Newsletter - Annals of the Brazilian Academy of Sciences

ISSUE 57

AABC - volume 94.3 2022

  
 
 

 
 

A total of 61 articles were published in this issue of the Annals of the Brazilian Academy of Sciences (AABC). The areas with the most contributions are Microbiology (Mcbio - 9), Animal Science (AnSci – 9), Ecosystems (Ecosy - 8), and Engineering Sciences (EnSci - 8), followed by Health Sciences (HeSci – 6), Biomedical Sciences (BmSci - 5), and Chemical Sciences (ChSci – 4). Papers focusing on Cellular and Molecular Biology (CeMoBio - 3), Forestry Science (FoSci – 2), Mathematical Sciences (MaSci - 2), Geosciences (Geosci - 2), Crop Science (CrSci - 2), and Soil Science (SoiSci - 1) can also be found.

As always it is very difficult to choose the highlights. In Microbiology, there is a study on the use of an enzyme-synthesizing microorganisms for bioremediation in landfills, the ecology of some fungi in the Amazon Forest, and a review of studies on diatom developed in Brazil.

The present issue of the AABC has also a study on zooplankton variation on the southern coast of Brazil, selective logging and its effects in the Amazon, and the description of a new species of fern in a reserve in Argentina (Ecosy). Animal Science shows and endemicity analysis of a particular fauna of fishes affected by an environmental disaster due to the rupture of a dam and the effects of management practices in the quality of meat production.

Among the important papers in Health Sciences is a study on molecular markers for the detection of malignant gliomas, which represent most of brain tumors in the adult Brazilian population. Other contributions focus on the immune response of Coronavac, potential new sources of an antimicrobial drug, and a review of the distribution of leptospirosis.

I would also like to draw attention to a study on the application of a biologically based surfactant to control termite species in edifications (ChSci), spectrometry signatures of the Araguainha impact structure (Geosci), and the effects of climate change in marginal savannas in Central Brazil (FoSci).

As always, I wish to point out that since 2000 all papers published by the AABC can be downloaded free of charge from the SciELO platform and that the previous editions of the AABC Newsletter are available at the ABC website.

We invite you to scroll through the text and click on the title of the article that interests you! Please share this newsletter and the papers published by the AABC with your students and colleagues!

 

Alexander W. A. Kellner
Editor-in-Chief

  
       
 

 

  
 

MATHEMATICAL SCIENCES

  
       
 

1- Continuous Probability Distributions generated by the PIPE Algorithm

LUIS G.B. PINHO, JUVÊNCIO S. NOBRE & GAUSS M. CORDEIRO

This paper proposes the use of an evolutionary algorithm applied to symbolic mathematics as a viable modeling tool. Given a data set of continuous data and a set of mathematical symbols, the algorithm aims for developing a probability density function for the data using the mathematical symbols provided while restraining the length of the mathematical expression for the function. Results of tests with real data reveal models with good likelihood and greater parsimony compared to traditional and modern probability density functions.

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2- Division of Power Series: Recursive and Non-Recursive Formulas

PANTERS RODRÍGUEZ-BERMÚDEZ

Power series are important in mathematics to approximate differentiable functions by polynomials of arbitrary order. These approximations have applications in many problems of physics and engineering and operating with power series becomes crucial. In this paper we propose a new formula to divide power series. We develop two versions of the formula: a recursive and a non recursive one, the latter aiming to reduce the computational cost for high-order series truncation. To use the non-recursive formula we define certain fundamental sets of summation indexes. Additional non-trivial information about effects of repetition of the indexes are needed and contabilized within a coefficient gamma in the formula, we explain how to calculate this coefficient for each summation index by constructing appropriate mappings between the fundamental sets of indexes previously defined.

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CHEMICAL SCIENCES

  
       
 

3-  Hydrolysis of macauba kernel oil: ultrasound application in the substrates pre-emulsion step and effect of the process variables

HELOÍSA DA SILVA, MIRIAN FEITEN, DJÉSSICA RASPE & CAMILA DA SILVA

Experimental data from the application of ultrasound as a previous step of pre-emulsion of substrates in the hydrolysis reaction of macauba kernel oil are demonstrated. The effect of ultrasound in the pre-emulsion of the substrates was evaluated on the free fatty acid content, as well as the process variables (reaction time, percentage of catalyst and buffer solution) were investigated in the hydrolysis step, in maximizing the production of free fatty acids. In addition, the reuse of the enzyme in this process was evaluated. These results contribute to the improvement of future investigations, approaching little explored strategies for this process.

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4- Magnetic alignment of rhodamine/magnetite dual-labeled microtubules probed with inverted fluorescence microscopy

HENRIQUE EISI TOMA, DANIEL OLIVEIRA & FERNANDO M. DE MELO

As a possible route for manipulating the biological structures involved in the cellular machinery, dual-labeled microtubules have been successfully generated by incubating a tubulin mix of 7:3 biotinylated-tubulins and rhodamine-tubulins. After treating with superparamagnetic nanoparticles bearing streptavidin groups, the microtubules were successfully monitored by fluorescence microscopy, allowing to perform their controlled  orientation and alignment  in the presence of a magnetic field.  

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5- Comparative study on eucalyptol and camphor rich essential oils from rhizomes of Hedychium spicatum Sm. and their pharmacological, antioxidant and antifungal activities

AVNEESH RAWAT, MANJU RAWAT, OM PRAKASH, RAVENDRA KUMAR, HIMANSHU PUNETHA & DHARMENDRA S. RAWAT

H. spicatum Sm. is a near endemic species, erect, stout and perennialrhizomatous herb of family Zingiberaceae. It has been used in various traditional therapies like bronchitis, indigestion, eye disease, inflammations and diarrhea.This endangered but traditionally and medicinally important herb has shown diversification in molecular and chemical level in respect of the reported biological activities. From this perspective, it becomes significant to look at the chemical compositional differences in the essential oils of H. spicatum collected from different altitudinal locations. This study compares the chemical variation of oils collected from Tarai region of Pantnagar and with that of Nainital. Furthermore, the variability was also checked in respect to various pharmacological, antioxidant and antifungal activities. The study aims to facilitate the researchers to work out for more detailed mechanisms related to the activities of the essential oils taking into consideration the synergistic effects of the identified compounds.

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6- Synthesis of N-acyl glycine surfactant from palm oil as green repellent and toxicant to termite (Microcerotermes diversus)

SYAMIMI N.F. SAZALEE, NUR A.A.A. RUSLAN, NURHAMIZAH NORDIN, WAHIZATUL A. AZMI, VICIT R.E. SUK, MISNI MISRAN, TAN S. YONG, KOAY K. TEIK & POH W. CHIA

The Microcerotermes Diversus termite species is the most destructive termite that causes serious economic damage to wooden products in buildings. Different approaches have been known to control this termite, with mainly encompass the use of hazardous chemicals. However, these approaches have caused negative impacts to the ecosystem. Thus, this study describes, for the first time synthesis of the bio-based surfactant, N-acyl glycine surfactant derived from palm oil as alternative approach in termite control (Microcerotermes diversus). The current work is of interest to future scientists to meet the goal for a more sustainable chemistry in the near future.

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BIOMEDICAL SCIENCES

 
       
 

7-Schinus terebinthifolia Raddi leaf lectin is an antiangiogenic agent for Coturnix japonica embryos

ARDILLES J.C.A. SANTOS, VICTOR F.S. ARAÚJO, RAYSSA P.M. FRANÇA, EVA L.A. SILVA, WELTON A. ALMEIDA, THAMARA F. PROCÓPIO, PATRÍCIA M.G. PAIVA, THIAGO H. NAPOLEÃO, EDBHERGUE V.L. COSTA, ROMILDO A. NOGUEIRA & EMMANUEL V. PONTUAL

Angiogenesis is the budding of new blood vessels, important in several processes, including the development of embryos and growth of tumors. Here, we evaluated if a protein (the lectin named SteLL) isolated from leaves of Brazilian pepper tree could interfere with angiogenesis. For this, we used the in vivo model of yolk sac membrane of Japanese quail embryos. The results showed that SteLL (decreased the angiogenesis within yolk sac membrane. This inhibition of vessels formation decreased blood supply to the embryos. The findings implicate SteLL as an antiangiogenic agent and add to the panel of biological activities of this protein.

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8- Antagonistic activity of Lactiplantibacillus plantarum 6.2 extracted from cocoa fermentation and its supernatant on Gardnerella vaginalis

LOUISE P. RAMOS, MILENA E. DE ALMEIDA, HERBERT P.S. FREIRE, WALLACE F.B. PESSOA, RACHEL P. REZENDE & CARLA C. ROMANO

Vaginosis is predominantly caused by vaginal dysbiosis. Gardnerella vaginalis contributes significantly to bacterial vaginosis, which causes an ecological imbalance in vaginal microbiota and presents with the depletion of Lactobacillus sp. We investigated the applicability of Lactiplantibacillus plantarum 6.2 (Lpb 6.2), a strain of lactobacilli isolated from cocoa fermentation, and its cell-free supernatant on G.vaginalis. We discovered that the culture supernatant of Lp 6.2 have a strong antagonistic activity against G.vaginalis and decreased and displace G. vaginalis from the site of attachment to vaginal cells. Thus, the Lpb 6.2 strain is a good probiotic for treating bacterial vaginosis.

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9- Exosomes carried miR-181c-5p alleviates neuropathic pain in CCI rat models

YU ZHANG, GUANGYAO YE, JINGSONG ZHAO, YUEBO CHEN, LINGSI KONG, CHAOXU SHENG & LIYONG YUAN

Mesenchymal stem cells(MSCs) derived exosomes(Exos) is one of the most promising candidate for the treatment of neuropathic pain(NP). Here we investigated the therapeutic effect and mechanism of exosomal miR-181c-5p(ExomiR-181c-5p) on a rat model of NP induced by sciatic nerve chronic constriction injury(CCI). Our study demonstrate that miR-181c-5p expression was obviously decreased in a time-dependent manner in CCI rats. ExomiR-181c-5p internalized by microglia cells and inhibit the secretion of inflammation factors.ExomiR-181c-5p Intrathecal administration alleviated NP and neuroinflammation response in CCI rats. ExomiR-181c-5p may be a valid alternative for the treatment of NP.

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10- Farnesol modulation of Rhodotorula mucilaginosa in biofilm and planktonic forms

ISABELE C. JARROS, FLÁVIA F. VEIGA, JAKELINE L. CORRÊA, ISABELLA L.E. BARROS, RAISSA B. PEDROSO, MELYSSA NEGRI & TEREZINHA I.E. SVIDZINSKI

Nowadays an increase in the number of human invasive infections by Rhodotorula mucilaginosa, has been described, with an overall mortality rate attributed of 15%. In addition, it is known biofilm is the preferred lifestyle of clinical pathogens, which provides high resistance to antifungal agents. Farnesol has been found to play an important role in the growth and regulation of Candida biofilms, but it was scarcely known for Rhodotorula spp. Our results show that farnesol exerts a modulating activity also in biofilm formed by R. mucilaginosa, which could have a role in the etiophysiopathogenesis of infections by this yeast.

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11- Hyperphagia and hyperleptinemia induced by low-protein, high-carbohydrate diet is reversed at a later stage of development in rats.

MENDALLI FROELICH, SUELEM A.F. LEMES, MAÍSA P.S. ELIAS, ANA PAULA S.S. OLIVEIRA, PATRICIA C. LISBOA, JOSÉ RICARDO DE SOUZA, EGBERTO G. MOURA, FHELIPE J.S. ALMEIDA, MAYARA P. PEREIRA, MARCIA Q. LATORRACA & NAIR H. KAWASHITA

This study investigated whether increased food intake after 15 days of low-protein, high-carbohydrate (LPHC) and its normalization in the later period of development change the content of key proteins related to leptin or adiponectin signaling in the hypothalamus. LPHC diet (6% protein for 15 days) reduced hypothalamic leptin action by diminishing ObRb and POMC levels, leading to hyperphagia and adiposity body. Medium-term administration (45 days) of LPHC diet or reverting to control diet (LPHC diet for 15 days followed by control diet for another 30 days) restored the levels of these proteins, thereby improving body lipid mass rearrangement in adulthood.

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HEALTH SCIENCES

 
       
 

12- Gliomas molecular markers: importance in treatment, prognosis and applicability in brazilian health system

JÉSSICA S. SOLDATELLI, IURI M. DE OLIVEIRA, MAXIMILIANO C. KNEUBIL & JOÃO ANTONIO P. HENRIQUES

Malignant gliomas represent 80% of adult primary brain tumors. The early detection through the sensitive and specific molecular tumor markers IDH-1/2, 1p/19q, MGMT, ATRX, TERT, H3, EGFR, BRAF and Ki67 analysis improves gliomas diagnosis, prognosis as well as staging, assessment of therapeutic response and detection of recurrence. This review demonstrates which biomarkers are used in the clinical practice for glioma and the steps in the requesting process for their examination in the Brazilian Public Health System (SUS) scope, through partnerships between specialized health centers and clinical analysis laboratories, clarifying the necessary subsidies for more integral, equal and universal SUS service.

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13- Memory elicitation, T-cell response and antibody production: an independent study of an inactivated entire virus vaccine (Coronavac)

GUILHERME ANTONIO DE SOUZA-SILVA, RODRIGO CESAR A. DE AQUINO, GEORON F. DE SOUSA, BÁRBARA RAFAELA S. BARROS, MARÍLLIA RAPHAELLA C.F. DE LIMA, LEONARDO C.O. CRUZ, BIANCA F. SÃO MARCOS, ANNA JÉSSICA D. SILVA, APARECIDA VIRGÍNIA S. TALES, MADI V. DINIZ, MÔNICA MARIA C. LIMA, IGOR W.A. DE SÁ, FÁBIO A.C. RODRIGUES, EDSON B. DE SOUZA, ARIONE V. DO NASCIMENTO, AMANDA M. VIEIRA, BRUNO M. DE CARVALHO, EVÔNIO B. CAMPELO JÚNIOR, ANTONIO C. DE FREITAS & CRISTIANE M.L. DE MELO

The aim of this study was to analyze the immune response of these professionals immunized with CoronaVac in the first and second doses. Blood samples were collected after the first and second doses of the vaccine and used to investigate hematological, biochemical, and immunological parameters. Post-first dose immunological phenotypic memory profiles (T CD4+, TCD8+ and CD19+) showed a significant increase. The production of IgM and IgG after vaccination showed increased values between doses. CoronaVac showed activation of APCs monocytes, memory response of T and B lymphocytes, with immunoglobulins production. This set of responses is characterized by the Th2/Th17 immunological profile.  

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14- A Systematic Review of the geographic distribution of pathogenic Leptospira serovars in the Americas, 1930-2017

ERICKA S. BROWNE, JOÃO LUIS R. CALLEFE, EROS R.S. DE JESUS, CAIO G. ZEPPELINI, CLEBER CREMONESE & FEDERICO COSTA

Leptospirosis is an important public health problem caused by Leptospira. The article objective is to characterize the geographic distribution of pathogenic leptospira serovars in the Americas through a systematic review of the literature between 1930-2017. Bovines, equines and dogs where the most frequently studied domestic species. However, a large diversity including 80 species of wild animals were studied. Icterohaemorrhgiae, Canicola, Pomona and Grippotyphosa were the most common serovars.The Results indicate a large concentration of studies in Latin America, with emphasis on Brazil, in wild mammals and three main domestic animal groups.  

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15- Differential Proteomic and Genomic Comparison of Resistance Mechanism of Pseudomonas aeruginosa to Cefoperazone Sodium/Sulbactam Sodium

SHUANGQI CAI, KEXING ZHANG, FEI WEI, LEI YANG, DEZHI SONG, JIN LUO, HONG HUANG, XINGXIN GAO, GANG DU, JINLIANG KONG & YIQIANG CHEN

In this study, we retrospectively analyzed the drug resistance of P.a isolated at the First Affiliated Hospital of Guangxi Medical University. Drug-resistant P.a strains were constructed, then wild-type (WT) and drug-resistant (DR) strains were compared and determined differences in genes and proteins between DR and WT strains. Based on the discovery of differential proteins and genes, it helps to improve the clinical treatment against P.a and will become the key to clinical control and reduction of P.a infections, what's more, it is therefore of great value, and the basis for further research on bacterial drug resistance.

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16- Peptides DLL37-1 and LL37-1, an alternative to inhibit biofilm formation in clinical isolates of Staphylococcus aureus and Staphylococcus epidermidis

MARYL LORENA SEGURA ALBA, ANDREA TATIANA DURÁN-RODRIGUEZ, LUZ MARY SALAZAR PULIDO, JAVIER ESCOBAR-PÉREZ, SERGIO ALEJANDRO GUTIÉRREZ, JEANNETTE NAVARRETE OSPINA, GLADYS PINILLA BERMÚDEZ & LILIANA CONSTANZA MUÑOZ MOLINA

Staphylococcus aureus and Staphylococcus epidermidis have microbial surface components recognizing adhesive matrix molecules (MSCRAMM) adhesion proteins that enhance their biofilm formation ability, as well as virulence factors that influence morbidity and mortality in hospital settings. In this work, four peptides analogous of the peptide LL-37 that were evaluated to inhibit biofilm formation and its action potential on the expression of MSCRAMM proteins in clinical isolates through different tests, such as crystal violet, PCR and qPCR. In this study, it was evidenced that of the peptides DLL37-1  at a 5 µM concentration was an efficacious antimicrobial agent and depicted greater biofilm inhibition in both bacterial species.

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17- Antimycobacterial and anti-inflammatory activities of fractions and substances from Erythrina verna Vell focusing on dual severe TB treatment approach

THATIANA L.B.V. SIMÃO, GABRIELA V. AGUIAR, AMARO C. RAMOS, GLAUBER P. DA SILVA, MICHELLE F. MUZITANO, ELENA LASSOUNSKAIA & RODRIGO R. DE OLIVEIRA

Much is said of the Brazilian biodiversity and its importance for the preserve of the life. Plants are used as medicinal source by millennial different civilization. The secondary metabolites produced by the plants are targets of the pharmacy industry in the drug production used in the anticancer and antimicrobial therapies, beyond of using as anti-inflammatory drugs. The article Antimycobacterial and anti-inflammatory activities of fractions and substances from Erythrina verna Vell focusing on dual severe TB treatment approach shows importance of the secondary metabolites as source of the new antimicrobial drugs.

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CELLULAR AND MOLECULAR BIOLOGY

 
       
 

18- Effects of moderate alcohol consumption on behavior and neural systems of Wistar rats

RAFAEL CONTE, CAROLLINE M.S. ZANGIROLAME, DENISE R. GOBBO, LAÍS DA S. PEREIRA, CARLOS E. PANFILIO, REJANE D. REGINATO, LUCIANA L.S. MALUF, DEBORA A. SCERNI & ISABEL C. CÉSPEDES

Alcohol consumption can induce health harms even while consumed in low doses. This study evaluated the effects of moderate doses regarding behavior and neurochemical markers. Rats that consumed alcohol chronically and intermittently showed slightly lower anxiety behaviors. Also, brain areas related to reward and stress processing showed altered function. Thus, it can be concluded that moderate doses of alcohol induce brain and behavioral changes related to alcohol use disorder.

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19- Phytochemical screening and phytocytotoxic effects of the tropical Myrcia vittoriana (Myrtaceae)

LOREN CRISTINA VASCONCELOS, TATIANA T. CARRIJO, ALDINO NETO VENANCIO, THAMMYRES A. ALVES, AMÉLIA CARLOS TULER, RENAN K. HOLLUNDER, MÁRIO LUÍS GARBIN, LUCIANO MENINI & MILENE M. PRAÇA-FONTES

Allelopathy is the ability of a plant to affect the germination and growth of other plants through the release of compounds into the environment. A previous study suggested that Myrcia vittoriana could show allelopathic activity on neighboring species in a Restinga plant community. We investigated the phytotoxic potential of M. vittoriana through the phytocytotoxic activity of its leaves on the initial development and cell cycle of model plants. The results confirmed the phytotoxic effect of M. vittoriana. The synergistic effects of the metabolites found in the extracts and essential oil can explain these findings.

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20- Anatomy and development of the edible fruits of Cordiera concolor (Rubiaceae)

MARINA D. JUDKEVICH, ROBERTO M. SALAS & ANA M. GONZALEZ

Cordiera concolor is a species belonging to the Gardenieae complex (Rubiaceae).  Most of the species of this complex has fleshy fruits, with seeds imbedded in a pulp, which historically was considered of a placental nature. In order to establish the origin of the gelatinous tissue surrounding the seeds in the fruit of C. concolor, anatomical studies of flowers and fruits at different stages of development were carried out. As a result, it was found that this tissue is formed by mesocarp and endocarp and not by placental tissue as occurs in other species of the Gardenieae complex.

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MICROBIOLOGY

 
       
 

21- In vitro comparison between antimicrobial and antibiofilm effects of Green Propolis and Baccharis dracunculifolia against Staphylococcus pseudintermedius isolate

EUNICE V. BARBOSA, YASMIM M. ASSUMPÇÃO, IZABEL M. TEIXEIRA, RENATA F.A. PEREIRA, VICTOR P. RIBEIRO, JAIRO K. BASTOS, CLARISSA V. CARDOSO, MAÍRA H.T. LIBERAL, BRUNO A. PENNA & LEANDRO M. ROCHA

Bees are seriously threatened by the combined effects of climate change and intensive agriculture. Green propolis, are common to treat canine bacterial infections. Staphylococcus pseudintermedius is considered the most common opportunistic pathogen in canine pyoderma. To evaluate the possibility of using Baccharis dracunculifolia extract to replace Green Propolis in the treatment of these infections, both were compared. Both extracts showed similar results inhibiting bacterial growth and biofilm formation.  Futher studies are needed, but the results indicate that Baccharis dracunculifolia extract could be an alternative to the Green Propolis extract in the treatment of staphylococci infections.

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22- Biotechnological potential of microorganisms from landfill leachate: isolation, antibiotic resistance and leachate discoloration

LETICIA A.A. GARCETE, JOHANA E.R. MARTINEZ, DAHIANA B.V. BARRERA, RAFAELLA C. BONUGLI-SANTOS & MICHEL R.Z. PASSARINI

Landfills are considered a risk to human health and the environment. The use of enzyme-synthesizing microorganisms recovered from leachate can be a promising technique in bioremediation processes of toxic compounds. Forty bacteria and fifteen fungi were isolated from leachate from the Foz do Iguaçu landfill. Of these, six bacteria showed resistance to at least one antibiotic tested and six fungi showed resistance to the antimycotic nystatin. A bacterium and a fungus were able to decolorize 19.15% and 25.26% of the leachate, respectively. The results demonstrated the potential of using leached microorganisms as bioremediation tools.

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23-The influence of the microwave oven on the production of solid culture medium and quality of microbial growth

LUANA C.G. BAZANA, ÂNDERSON R. CARVALHO, MANOELA MACE & ALEXANDRE M. FUENTEFRIA

The proper cultivation and growth of microorganisms are essential for clinical microbiology on the isolation of pathogens and antimicrobial susceptibility tests. However, the robust growth of these microorganisms is conditional on the quality of the constituents of these media. This article showed that the manufacturing process of the Sabouraud dextrose agar solid medium influences the growth of fungi such as Cryptococcus and Microsporum. The usage of the microwave oven as an alternative to the autoclave in the preparation of the culture medium avoids prolonged exposure to heat and the exacerbated degradation of the nutrient sources contained in the culture medium.

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24-“Hitchhicking with invertebrates”: two reports of epibiosis by peritrich ciliates on ostracods and hydrachnid mites in tanks of epiphytic bromeliads from south Brazil

EDUARDO MALFATTI, ERMINDA C.G. COUTO, PEDRO M.A. FERREIRA & LAURA R.P. UTZ

Bromeliads are a diverse group of plants, and many of their species are able to retain water and organic matter, providing a habitat for several organisms. In our study, collecting water of epiphytic bromeliads from southern Brazil, we found two associations between aquatic invertebrates and peritrich ciliates. These associations are called epibiosis, and it’s a way of organisms dispersal in these environments. We compared the frequency of Lagenophrys sp. attached to ostracods and the association between Rhabdostyla sp. and hydrachnid mites. Ostracods and Lagenophrys sp. shown a stronger association, suggesting ostracds can serve as dispersers of these peritrich ciliates.

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25- Wood-inhabiting macrofungi Hymenochaetales and Polyporales (Basidiomycota) in the Amazon Forest: relationship the abiotic factors and substrate colonization

DOUGLAS M. COUCEIRO & SHEYLA REGINA M. COUCEIRO

The important knowledge about the ecology of the Polyporales and Hymenochaetaceae fungi is essential for the conservation and preservation of the forest and other species in view of the important role that these organisms perform in ecosystems. However, the dispersion and colonization of new substrates by these fungi are being negatively affected with the increase in forest fragmentation, mainly due to logging, fires and the advancement of agribusiness. In the Amazon Forest, this scenario is worrying and shows that field research to understand the ecological cycle of fungi and their relationships, especially in areas that are not yet known, are of great relevance and necessary to maintain the functioning of the forest.

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26- 177 years of diatom studies in Brazil: knowledge, gaps, and perspectives

STÉFANO ZORZAL-ALMEIDA, ELTON A. LEHMKUHL, GISELE C. MARQUARDT, KRYSNA S. MORAIS, MATEUS S. TRANCOSO & ANGELA M. SILVA-LEHMKUHL

Diatoms are microalgae characterized by a silica shell, similar in appearance to glass armor. This group is among the most diverse organisms on Earth, with estimates of up to 100,000 species, which have existed since the Cretaceous. However, knowledge about the true biodiversity of the group in Brazil is an early stage. The studies started almost 180 years ago, but the most intense development started a few decades ago. Many new species to the science have been described in the country, and there is a tendency for this number to be increasing.

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27- Anti-Leishmania amazonensis activity of the marine sponge Dercitus (Stoeba) latex (Porifera) from São Pedro and São Paulo Archipelago, Pernambuco, Brazil

ANNA L.S. BARRETO, ARIADNE N. ALONSO, DANIEL C. DE MORAES, JOSÉ A.R. CURVELO, KILDARE MIRANDA, MARISTELA B. PORTELA, ANTÔNIO FERREIRA-PEREIRA, THAIS SOUTO-PADRÓN & ROSANGELA MARIA DE A. SOARES

Leishmaniasis is a neglected infectious disease that affects animals and humans in tropical and subtropical regions. Despite recent advances in treatment methodology, its management remains unsatisfactory mainly due to the high toxicity and the increased drug resistance. In attempt to circumvent this issue this work evaluate the activity of an aqueous extract of a marine sponge Dercitus (Stoeba) latex against the etiological agent of this disease, Leishmania amazonensis. Results revealed that  this extract was able to disrupt meaningful cellular components and inhibit enzymes associated with parasite virulence reinforcing the use of natural products as a promising alternative for infection treatment.

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28-Autochthonous endophytic bacteria from Musa sp. controls Fusarium oxysporum f. sp. cubense under in vitro conditions

MARIA J. MARTINS, ADELICA A. XAVIER, ISABELLE C. CARDOSO, DANIELA F. SILVEIRA, REGINA C.F. RIBEIRO, SAMY PIMENTA & SILVIA NIETSCHE

The present study shows the relevance of the bioprospecting bacteria that could be candidates for biological control of the pathogens that causes drastic economic and quality losses in banana crops. Among the isolates tested Bacillus spp., (EB37) was the most effective in reducing Fusarium oxysporum f. sp. cubense spores’ germination in the mixed solution test and was effective in reducing the number of spores/cm2 in paired and volatile tests. This result is particularly important to develop commercially efficient and successful biocontrol strategies against plant pathogens.

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29- Investigation of factors related to biofilm formation in Providencia stuartii

SIVONEIDE M. DA SILVA, BÁRBARA A. RAMOS, RAFAEL A.Q.C. DE SÁ, MÁRCIA V. DA SILVA, MARIA T.S. CORREIA & MARIA B.M. DE OLIVEIRA

Providencia stuartii is one of the Enterobacteriaceae species of medical importance associated with various infections. This study investigated the cellular hydrophobicity of clinical isolates of P. stuartii. It also analyzed genes related to the fimbrial adhesin and compared with other Enterobacteriaceae. The examined isolates to form biofilm and had a practically hydrophilic cell surface profile. However, fimH and mrkD genes were not found in P. stuartii, unlike observed in literature. These results show that this pathogen has specificities regarding for biofilm formation, which makes it difficult to destabilize the infectious process and increases its permanence in hospital units.

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ECOSYSTEMS

 
       
 

30- Zooplankton variability and possible oceanographic anomalies from 1996 to 2009 on the south coast of Brazil

CHARRID RESGALLA JUNIOR

The analysis of 14 years of sampling data on the zooplankton community in southern Brazil showed a tendency toward increased density and reduced species richness that could be a response to a prolonged period of negative sea surface temperature (SST) anomalies in the Pacific Ocean and the ENSO phenomenon. The persistence of the La Niña phenomenon between 2001 and 2008 was associated with a higher incidence of stress from southwest winds and a greater reach of the front of the La Plata River plume. This case may be an example that climate change can lead to regional cooling of oceanographic conditions. 

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31- Comparative cypsela morphology in Campuloclinium DC. and contributions to Eupatorieae tribe (Asteraceae) systematics

DANILO MARQUES, RAFAEL O. FRANCA, GABRIELA E. FARCO & JULIANA MARZINEK

Cypselae are the small fruits of the sunflower family, formally named Asteraceae. The anatomical and morphological studies with these fruits have given new evolutionary perspectives, and it helped in the delimitation of many hierarchical levels within the family. In Eupatorieae (Asteraceae Tribe), there are many uncertainties about the Campuloclinium circumscription. Therefore, we evaluated through morphology and anatomy characteristics that could elucidate the delimitation of this genus. Our study demonstrated that stipitate cypselae and trichome distribution are characteristics with synapomorphy potential to Campuloclinium. Furthermore, trichome types present in fruits are diagnostic characters of two species, Campuloclinium campoclinoides and C. hirsutum.

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32- Floral biology and reproductive system of physic nut (Jatropha curcas L., Euphorbiaceae) in ‘Recôncavo da Bahia’, Brazil

LUIS F. DE-FARIAS, SIMONE A. SILVA, LIDYANNE Y.S. AONA & FAVÍZIA F. DE OLIVEIRA

In this manuscript aspects of the floral and reproductive biology of Jatropha curcas were studied in Cruz das Almas/BA. The work proved that the morphological and phenological aspects are strategies to guarantee the reproductive success of this plant. The species is perennial, monoecious, and self-compatible, where reproduction can occur by self-pollination or cross-pollination. However, natural pollination obtained more fruit. We suggest performing artificial pollination between 8 and 9:30am to obtain more fruits, due to the flowers being receptive to pollination. The results supply valuable information that will contribute to the development of hybridization and genetic improvement programs for this species.

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33- Chironomus columbiensis (Diptera: Chironomidae) as test organism for aquatic bioassays: Mass rearing and biological traits

MILTON L. MONTAÑO-CAMPAZ, LUCIMAR G-DIAS & BEATRIZ TORO-RESTREPO

Chironomidae are aquatic insects that have become an ideal model in laboratory tests to evaluate the toxic effect of different pollutants because have great ecological relevance and their rearing in the laboratory has low cost. However, the use of chironomids as test organisms depends on the standardization of protocols for the rearing under laboratory conditions and expanding knowledge of its biology. Therefore, in this study, we standardize the culture of C. columbiensis and analyze its life cycle under laboratory conditions.

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34- Does selective logging affect litter deposition rates in central Brazilian Amazonia?

JARLESON L. BARREIROS, NAIARA S. DE OLIVEIRA, RICARDO A.S. CERBONCINI & LOURI KLEMANN JUNIOR

The search for ways of sustainable exploitation of natural resources is necessary to prevent irreversible impacts of human activities on ecosystems. Tropical forests hold crucial resources to human society, but sudden changes in their ecological balance may threaten their existence. Reduced-impact logging may be an alternative for sustainable development in the Amazon, as it had no intense effects on litter deposition - a fundamental ecosystem process for nutrient cycles.

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35- Structural and histochemical aspects in leaves of six species of Anemia (Anemiaceae) occurring in rocky outcrops

PEDRO G. DE MORAES NETO, NATÂNIA P.P. DA SILVA, ANA CATARINA S. FURTADO & ANA CARLA FEIO

In this article we gather information and species of Anemia not yet investigated from the anatomical point of view, occurring in extreme environments, such as rocky outcrops. Currently, in the Amazon, there are no groups or researchers studying anatomy applied to ferns, something not unlike the world scenario. It is important to emphasize that Journals with good acceptance for works with ferns are increasingly restricted, making the Anais da Academia Brasileira de Ciências a magazine of paramount importance for all of us who work for the biological knowledge of this group.

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36- Amauropelta yabotiensis (Thelypteridaceae), a new species from Biosphere Yabotí Reserve (Misiones, Argentina) and its taxonomic relationships

AGUSTINA YAÑEZ, GONZALO J. MARQUEZ, DANIELA OCAMPO TERRAZA & M. MÓNICA PONCE

A new species of fern, Amauropelta yabotiensis (Thelypteridaceae), was found growing in the Esmeralda Provincial Park, into the Yabotí Biosphere Reserve (Prov. Misiones, Argentina). The species was found during an expedition through the southern portion of the Yabotí-miní stream, a floristically unexplored area. In this article the species is described and illustrated, its taxonomic affinities and geographic distribution are analyzed, and a distribution map and a key to distinguish it from other Amauropelta species from Misiones province are provided. This new finding highlights the importance of the Yabotí Reserve as a reservoir of biodiversity in the region.

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37- Bibliometric analysis of peer-reviewed literature on the Patos Lagoon, southern Brazil

FABIANA G. BARBOSA & MARIANNA LANARI

Bibliometric analysis is a powerful tool to quantify and characterize the scientific literature, identifying knowledge gaps and providing ideas for further studies. By investigating studies conducted in the Patos Lagoon (southern Brazil), one of the largest chocked coastal lagoons in the world, we found 360 articles published, with a significant increase from 2004. The increasing number of studies was simultaneous to the establishment of a Long-Term Ecological Research Network’s study site in the estuarine area of the lagoon, as well as national collaborative efforts, corroborating the importance of long-term projects to the comprehension of the functioning of dynamic coastal systems.  

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GEOSCIENCES

  
       
 

38-  Gamma-ray spectrometry of the Araguainha impact structure, Brazil: Additional insights into element mobilization due to hydrothermal alteration

EMILSON P. LEITE, JOHANN LAMBERT, MARCOS ALBERTO R. VASCONCELOS, ALVARO P. CRÓSTA & ALESSANDRO BATEZELLI

We present the analysis of airborne and ground gamma-ray spectrometry signatures of the Araguainha impact structure, located in central Brazil, the largest impact structure in South America with 40 km diameter. The airborne data are total gamma-ray counts per second collected along flight lines spaced 1 km apart. The ground gammaray data are concentrations of potassium, uranium, and thorium isotopes calculated from radiations measured in three individual channels. The objectives are to distinguish lithologies within the structure, which have naturally distinctive radiogenic signatures, and identify potential post-impact hydrothermal alteration zones, as indicated by high K concentrations.

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39- Analysis of meteorological variables interaction associated with the environment of formation of Amazonian squall lines

CLÊNIA R. ALCÂNTARA, IZANA O. CARNEIRO & GABRIELLE B. OLIVEIRA

Relationships among meteorological variables with formation and propagation of Amazonian squall lines (ASL) is analyzed. 2005 year is verified by counting ASL cases to understand how variation of these variables influences their formation environment. Results show an increase in humidity on days with ASL, with highest occurrence during the wettest months. System propagation seems to be strongly related to moisture content that reaches the coast. A relationship between continent/ocean temperature gradient and ASL amount and types is also demonstrated. Such information is relevant because of the great importance of these systems and given the difficulty of predicting them.

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ANIMAL SCIENCE

 
       
 

40- Endemicity Analysis of the Ichtyofauna of the Rio Doce Basin, Southeastern Brazil

LUISA M. SARMENTO-SOARES, RONALDO F. MARTINS-PINHEIRO & MARÍA DOLORES CASAGRANDA

The Rio Doce is one of the most important freshwater systems of Brazil and has been strongly damaged by a burst of a Fundão tailing dam, in 2015. Empirical studies are much needed to better understand the impact of this environmental tragedy. Here, we compiled, curated and analyzed distributional records of 208 fish species present in the Rio Doce basin, to describe their geographic distribution and areas of endemism along the basin. We hope the data and results presented will contribute to future evaluations of the Rio Doce and will help to orient actions towards the restoration of the basin.

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41- First record of a sea anemone of genus Bunodosoma with two oral discs: a clue to asexual reproduction?

JOSÉ GUILHERME A. DA SILVA JUNIOR, RAFAEL ANTÔNIO BRANDÃO & PAULA B. GOMES

Different reproductive strategies that may occur on individuals of the same species may explain the success of sea anemones (Cnidaria:Actiniaria) in colonizing different ecosystems. We provide the first record of a Bunodosoma specimen with two oral discs and discuss the possibility of asexual reproduction in this genus.One individual of Bunodosoma cangicum was found in Carneiros beach with two fully individualized oral discs but with column and pedal disc still connected. Our finding may represent a clue to longitudinal fission in Bunodosoma. The absence of data regarding asexual reproduction in Bunodosoma suggests that it might be rare in this genus.

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42- A new wild strain of Caenorhabditis elegans associated with Allograpta exotica (Syrphidae) in Argentina: an update of its ecological niche and worldwide distribution

AUGUSTO SALAS, JOSÉ MATÍAS RUSCONI, MARGARITA ROCCA, FLORENCIA DÍAZ LUCAS, DARÍO BALCAZAR & MARÍA FERNANDA ACHINELLY

Caenorhabditis elegans is a free-living nematode used as a model organism in various scientific assays. This work describes for the first time a wild strain for Argentina (ARGLP1900) found in association with Allograpta exotica, a predator with potential biological control against aphids, in horticultural crops.

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43- Main altered characteristics in the meat of young cattle of different sexual conditions supplemented in tropical pasture

ODILENE DE S. TEIXEIRA, DIEGO S. MACHADO, LUCAS B. PEREIRA, NATHÁLIA P. REIS, CAMILLE C. DOMINGUES, JOHN L. KLEIN, JONATAS CATTELAM, JOSÉ L. NÖRNBERG, DARI C. ALVES FILHO & IVAN L. BRONDANI

Management practices that violate the physical integrity of animals, like surgical castration, are seen as worrisome. In this sense, our research addresses in depth that the immunocastration method is an alternative to surgical castration in cattle finished on pasture. Through the analysis of principal components, we showed that the qualitative characteristics of the meat: i) subcutaneous fat thickness; ii) instrumental color of the meat; iii) cooking loss, and; vi) softness (shear force) are the main characteristics that differ between surgically castrated or immunocastrated cattle and non-castrated cattle.

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44- Spinitectus asperus and Klossinemella iheringi, intestinal nematodes of Prochilodus lineatus (Pisces, Prochilodontidae) from the alluvial plain of the Middle Paraná River, Argentina

SILVINA B. CHEMES, SILVIA H. GERVASONI, LILIANA M. ROSSI & MARÍA DE LOS ANGELES P. LIZAMA

In this work, the association of Prochilodus lineatus with endohelminths in two isolated lakes of the alluvial plain of the middle Paraná River, Argentina, was studied. Two species of gastrointestinal nematodes were found: Spinitectus asperus (Cystidicolidae) and Klossinemella iheringi (Atractidae), being S. asperus the one with the highest prevalence and average intensity. This is the first record of K. iheringi in the middle Paraná River, as well as the southernmost record of S. asperus. 

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45- Threatened birds, climate change, and human footprint: protected areas network in Neotropical grassland hotspot

JUAN A. SARQUIS, ALEJANDRO R. GIRAUDO, MAXIMILIANO A. CRISTALDI & VANESA ARZAMENDIA

Climate change and Human footprint produce a synergic effect on Species distribution. Some bird species may adapt and stay, but others will have to look for new shelters. Entre Rios (Argentina) has 17 threatened bird species. This province has 50% (and increasing) of their lands with agriculture or livestock. Using Species Distribution Models and ZONATION could give researchers and decision makers tools to find and protect some important birds’ areas allowing mitigation processes. We found areas that are and will be important for these threatened species. The province will be able to offer shelter for threatened birds’ species in the present and future.

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46- Wintertime tales: How the lizard Liolaemus lineomaculatus endures the temperate cold climate of Patagonia, Argentina

NICOLÁS R. CECCHETTO, SUSANA M. MEDINA, FLORENCIA BAUDINO & NORA R. IBARGÜENGOYTÍA

In cold environments, ectotherms must find ways to endure throughout the coldest months of the year. We evaluated the cold hardiness and potential winter refuges of two lizard populations of Liolaemus lineomaculatus, from a temperate site and a cold site. Species remained several hours at their Supercooling Point (SCP), suggesting they can supercool. Potential winter refuges showed that lizards using these refuges would spend almost no time at all at temperatures close to or below their SCP. Liolaemus lineomaculatus developed physiological mechanisms that can help them survive when temperatures drop sharply, even when lizards are in suitable shelters.

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47- High taxonomic turnover and functional homogenization of rotifer communities in an amazonian river

EWERTTON S. GADELHA, BÁRBARA DUNCK, NADSON R. SIMÕES, EDUARDO T. PAES & ALBERTO AKAMA

Patterns of beta diversity of plankton communities in rivers have been mainly determined by hydrological factors that alter the dispersion and composition of species and traits. Taxonomic turnover and functional nestedness over time were observed as well as functional homogenization, which was arguably due to the hypereutrophic condition of the river. This study demonstrated that this Guamá River stretch presented low environmental dissimilarity and hypereutrophic waters, which benefited the establishment of a community of species with high taxonomic turnover over time, but with low functional dissimilarity and loss of some functions related to the functional traits evaluated in the ecosystem.

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48- Embryonic and post-embryonic development of the spider Polybetes pythagoricus (Sparassidae): A biochemical point of view

SOFIA ROMERO, ALDANA LAINO, GABRIEL MOLINA, MÓNICA CUNNINGHAM & CARLOS FERNANDO GARCIA

The analysis of energy expenditure during development is of special interest because it determines the survival of the offspring. In this study, we analyzed the changes in the content of proteins, lipids and carbohydrates, as well as the variation of lipovitelin and hemocyanin during the development of the spider Polybetes pythagoricus. Our results show that lipovitelins and phospholipids represent the main source of energy during embryonic and post-embryonic development. Lipovitellin apolipoproteins are gradually consumed, but then depleted after dispersal. Phosphatidylethanolamine is mainly consumed during the post-embryonic period. Finally, the concentration of hemocyanin begins to increase in the postembryonic stages.

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CROP SCIENCE

  
       
 

49- Diagrammatic scale for quantification of severity of white thread blight disease in yerba mate (Ilex paraguariensis Saint Hilaire)

MANUELA L. VERESCHUK, FACUNDO G. DOMINGUEZ, ADRIANA E. ALVARENGA & PEDRO D. ZAPATA

The evaluation of disease severity is an important decision for adoption of strategies and tactics for disease control. Visual quantification based on a diagrammatic scale can be a practical and efficient strategy. Therefore, the objective of this work was to elaborate and to validate a diagrammatic scale to estimate the severity of white thread blight disease caused by Ceratobasidium niltonsouzanum in yerba mate (Ilex paraguariensis). The scale may be of interest to research performing studies on estimation of productivity losses and decision-making for the management of this disease in yerba-mate cultivation.

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50- Development of anthocyanin markers: gene mapping, genomic analysis and genetic diversity studies in Ipomoea species

CARLA M. ARIZIO, SABRINA M. COSTA-TÁRTARA, IGNACIO M. ZUNINO & MARÍA M. MANIFESTO

The paper exposes the development of molecular tools on candidate genes involved in the metabolic pathway of anthocyanins, one of the main pigments in Ipomoea batata which possess an important antioxidant action in human health. We developed highly informative molecular markers since their codominant nature. They are useful to analyze genetic diversity and detect homologous chromosomes and unify different linkage maps. Also, transferability within the Ipomoea gender was tested.

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SOIL SCIENCE

 
       
 

51- Arbuscular mycorrhizal fungi community in coffee agroforestry, consortium and monoculture systems

WELLUMA T. BARROS, PATRÍCIA A.B. BARRETO-GARCIA, ORIVALDO JOSÉ SAGGIN JÚNIOR, RAFAEL N. SCORIZA & MAICON S. DA SILVA

Understanding the effects of different production systems on arbuscular mycorrhizal fungi can help to interpret interactions between their components and to define management strategies. Our study was conducted on soils under three coffee production systems and in a native forest located in the Bahia state, Brazil. Soil samples were collected at two times of the year. Number of spores and average richness did not show differences between the systems, only between seasons. The AMF community was shown to be related to the plant species composition of the system, which was reflected in the dissimilarity of heterogeneous systems in relation to the coffee monoculture system.

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FORESTRY SCIENCE

 
       
 

52- Climate change effects on marginal savannas from central-north Brazil

JOXLEIDE M. DA COSTA-COUTINHO, MÁRIO AUGUSTO G. JARDIM, LEONARDO S. MIRANDA & ANTONIO ALBERTO JORGE F. CASTRO

This study estimated the potential effects of climate change on peripheral plant diversity by predicting the distribution of species from Cerrado of Northern Brazil. Ecological niche modeling was used to provide present and future projections of responses in terms of occurrence of ten woody species based on four algorithms and four future climate change scenarios for the year 2050. Even in the most pessimistic scenarios, most species presented an expansion of potential occurrence areas, suppressing or cohabiting with species of adjacent biomes. The analysis of habitats in relation to anthropized areas and PAs demonstrate low future effectiveness in the protection of these savannas.

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53- Association between forest resources and water availability: temporal analysis of the Serra Azul stream sub-basin

DÉBORA J. DUTRA, MARCOS A.T. ELMIRO & SÓNIA M.C. RIBEIRO

Ecosystem services are essential for maintaining natural environmental conditions and anthropic actions, such as deforestation, can cause disturbances in processes, generating impacts on the environment, such as water crisis events in hydrographic basins. Thus, this work uses a landscape-scale analysis to explore the associations between changes in land use and water availability in the Serra Azul stream basin. We investigated the land use transitions from 2013 to 2018 and the results show that the region has been subjected to several impacts associated with the deforestation areas resulting from landscape transformations throughout the region.

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ENGINEERING SCIENCES

  
       
 

54- The Effect of Fermentation Time and Yogurt Bacteria on the Physicochemical, Microbiological and Antioxidant Properties of Probiotic Goat Yogurts

ECEM AKAN

In this study, effect of monoculture of some probiotic bacteria (Lactobacillus casei, Lactobacillus acidophilus, Bifidobacterium lactis) and their combination with yogurt bacteria (Streptococcus thermophilus and Lactobacillus delbrueckii subsp. bulgaricus) on yogurt fermentation was determined. Yogurt samples were followed regular intervals during fermentation time. Acidification kinetics, hardness values, viability levels of probiotic and yogurt bacteria, antioxidant activities (measured using DPPH and ABTS methods) and the total free amino acid content parameters were investigated during fermentation of yogurts The effects of the yogurt culture and fermentation time on these parameters were then examined.

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55-Solid waste generation model validation and economic loss estimation due lack of recycling

CAIO T. ÁSPET, DAVID M. DIAS, CARLOS B. MARTINEZ & ANTONIO C. PARANHOS

We present a mathematical model to estimate the generation of solid waste and the economic loss due to lack of recycling that allows projecting the mass of waste to be generated by inhabitants from socioeconomic indicators such as per capita income, social classes, and population size in a given urban territory. The model showed strong adherence when compared to the actual mass of waste collected in a case study of a Brazilian state capital. This tool can provide support for the economic evaluation of projects and public policies executed in Brazilian cities of up to 1.000.000 inhabitants.

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56- Spatial analysis of microclimatic variables in compost-bedded pack barn with evaporative tunnel cooling

RAFAELLA R. ANDRADE, ILDA DE FÁTIMA F. TINÔCO, FLÁVIO A. DAMASCENO, GABRIEL A.S. FERRAZ, LETÍCIA CIBELE S.R. FREITAS, CECÍLIA DE FÁTIMA S. FERREIRA, MATTEO BARBARI & CARLOS G.S. TELES JUNIOR

In this study, we aimed to assess the spatial variability of microclimate inside a closed compost-bedded pack barn (CBP) with a negative ventilation system during summer and winter. The research was carried out in a CBP located in the Zona da Mata region, Minas Gerais, Brazil. For each of the stations analyzed, the following environmental mean variables observed inside a CBP were measured: air dry-bulb temperature, air relative humidity, and windspeed, Temperature-Humidity index, and specific enthalpy. The kriging maps showed that the most critical housing conditions in the thermal environment were found, mainly, from the central part of the CBP, close to the exhaust fans. The analyses also pointed out that the system presented temperature gradients along the length. Probably due to the lack of thermal insulation of the material used to close the sides of the CBP, it did not allow spatial thermal uniformity for both seasons.

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57- The Effects of Electric Field and Ultrasound Pretreatments on the Drying Time and Physicochemical Characteristics of the Zucchini Chips

AHSEN R. ERGÜN

In the food industry drying technology is using for several purposes espacially in fruit and vegetables. New electrical methods such as electroplasmolysis and ultrasound technology for improving the food quality are used as a pretreatment. Zucchini which is consumed in several recipes, rich in water content and low solutes. This study aimed to show the effect of both ultrasound and electroplasmolysis and the synergistic effect of these applications as a pretreatment during the production of zucchini chips. Zucchini slices dried faster after electrical and ultrasonic pretreatments. The synergistic effect increased the greenness and protected color.

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58- Viability of Probiotics, Rheological and the Sensorial Properties of Probiotic Yogurts Fortified with Aqueous Extracts of Some Plants

ECEM AKAN, OKTAY YERLIKAYA, OZGE YILDIZ BAYRAM & OZER KINIK

In this research, we aimed to evaluate the effects of various medicinal and aromatic plant aqueous extracts on physicochemical, rheological, sensorial properties of probiotic yogurts and the viability of yogurt bacteria and probiotic bacteria during the storage period.  Consequently, aqueous extracts of some plants such as garlic, basil and thyme have successfully used in probiotic yogurt production and all yogurt samples containing plants have the enough probiotic counts to show therapeutic effect on human health.

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59- Infrared reflectance techniques applied to silica particles diameter determination - theoretical and experimental data

RACHEL F. MAGALHÃES, ALEXANDRA H. DE BARROS, MARCIA M. TAKEMATSU, ALAN PASSERO, MILTON F. DINIZ, JAIRO SCIAMARELI & RITA C.L. DUTRA

This manuscript presents an alternative and accurate methodology by infrared spectroscopy in the mid and near infrared regions for the determination of silica particle diameter, which is usually performed by laser diffraction particle size analyzer. The results by FT-IR spectroscopy were considered relevant and the article was selected for publication.

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60- Tracking and impact point of survey rocket by Telemetry and Slant-Range device

NILTON R. CANTANHEDE, EWALDO EDER CARVALHO, PAULO FERNANDES DA SILVA JÚNIOR & JONAS DE JESUS BARROS

In the current scenario, the development of rockets has shown to be a promising and competitive market, both from a scientific point of view, as well as from a financial and economic point of view. Regarding the technological aspects, there is an academic production with research related to the flight dynamics of launch vehicles, the application of navigation systems, lines of studies focusing on the composition of substances aimed at the propulsion of engines, transmission and reception means of onboard signals from ground rockets and studies related to the means of tracking rockets and satellites. From an economic point of view, there is a growth in the production chain for the technological development of nano satellite and rocket projects, not only by government agencies, but also by Startups, which present innovative ideas associated with academic society. Within this context, it is believed that many academic researches associated with the Aerospace Area can be added to the productive market as problem solutions.

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61- Starch and whey protein isolate films including an aroma compound stabilized by nanocellulose

ECE SOGUT & ATIF CAN SEYDIM

The use of aroma compounds in different applications is hindered due to their low stability. Nanoemulsions might improve the stability of aromas to provide efficient resistance during processing, to control the release rate, as well as for better stability and hiding unwanted flavors or enhancing flavor properties. Nanocellulose was used to efficiently stabilize bergamot oil, which is widely used as a flavoring agent, inside polymeric matrices such as whey protein isolate and starch. The results of this study showed that the produced films including bergamot oil nanoemulsions can be used aroma release mediums while enhancing the functionality of bergamot oil.

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All abstracts of the publications were provided by the respective authors.

  
     
       
 
 

 

Annals of the Brazilian Academy of Sciences
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