Gessiel N. Scheidt- PhD
- Pós-Graduação em Biotecnologia at Federal University of Tocantins
Gessiel N. Scheidt
- PhD
- Pós-Graduação em Biotecnologia at Federal University of Tocantins
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58
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Introduction
Current institution
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January 2014 - present
July 2009 - present
Publications
Publications (58)
No Estado do Tocantins a cultura do arroz exerce influência marcante na economia, sendo uma das principais culturas produzidas, tornando o estado um dos maiores produtores do país. O objetivo do presente trabalho foi avaliar o efeito das doses do extrato de algas de água doce na qualidade fisiológica das sementes de arroz de uma cultivar comercial,...
Agricultural expansion is advancing on marginal soils (Plinthic soils), but the liming recommendation for this soil, especially for soybean cultivation, remains unknown. This study aimed to evaluate soybean (Glycine max) responses to limestone doses in concretionary soils (plinthic and/or petroplinthic). The experiment was carried out in the greenh...
Rizobácterias do gênero Bacillus que são encontrados na rizosfera vivem em colônias, promovem o crescimento vegetal e apresentam potencial para o controle de fitopatógenos através da liberação de compostos voláteis. Diante disso o objetivo do estudo foi avaliar a eficiência do Bacillus subtilis Bs10 na promoção de crescimento de plantas de tomate e...
A produção agrícola brasileira é considerada uma das maiores do mundo, devido ao seu tamanho territorial e o seu potencial em produzir grãos. Trichoderma spp. é um dos fungos mais pesquisados no Brasil, pois tem ocorrência natural em praticamente todos os tipos de solos, e por possuir uma versatilidade de ação próprias, podendo atuar como promotor...
The use of fungi to obtain chitin and chitosan has advantages such as handling, extraction, and production control, thus allowing to generate high quality chitosan. This study aimed to isolate and identify strains of Cunninghamella spp., and assess the production of biomass, chitin, and chitosan. We determined the macroscopic and microscopic phenot...
Agricultural crops have been increasingly attacked by microorganisms that cause low productivity and severe losses to producers. In this context, chemical products are no longer sufficient to control pathogens, leading to the introduction of biological inoculants that can inhibit unwanted microorganisms. However, these products must be formulated p...
A utilização de cloreto de sódio em produtos cárneos além do seu efeito sensorial e conservante confere a eles uma estabilidade, pois diminui o crescimento microbiano e as reações química de degradação, prolongando a vida de prateleira. Apesar de ser utilizado para conservação de vários produtos, o sal quando não estéril pode conter microrganismos...
The development of aquaculture guarantees the supply of animal protein of great nutritional value, contributing to food security. Currently one of the main problems faced is the occurrence of diseases, responsible for a worldwide economic loss, equivalent to US $ 9 billion per year. Aiming to increase resistance to diseases, increasing growth rates...
The savannah soil is characterized by a lower fertility level. Thus, the study aimed to evaluate the
effect of Trichoderma spp. inoculated in soil fertilized with natural phosphate in the growth of
rice under greenhouse conditions. Twelve Trichoderma spp. isolates from savannah soil and one
standard strain (T. harzianum) were used. The isolates wer...
The aim of this work was to verify the Bacillus subtilis efficiency in soybean growth promotion, cultivated in soil with and without natural phosphate fertilization under greenhouse conditions. Seven Bacillus subtilis isolates and B. subtilis cocktail were used. The seeds were inoculated by Bacillus subtilis strains at a concentration of 2 x 108 CF...
p class="Default">As potencialidades de utilização de métodos alternativos no controle de doenças de plantas são incessantemente estudadas e avaliadas por vários pesquisadores no mundo inteiro, com o objetivo de minimizar o impacto ambiental através da utilização de produtos naturais. Este trabalho teve como objetivo traçar o perfil fitoquímico pre...
This study aimed thermal evaluation (TG/DTG and DSC), mineral elements quantification by atomic absorption and caffeine content of native progenies of grass mate (Ilex paraguariensis St.), in order to complement the genetic evaluation of these progenies at field to allow the selection of more productive ones for sustainable exploitation of natural...
It has grown the search to find viable alternatives to mitigate or even solve the problems caused by contaminants such as heavy metals. The use of adsorbents biomass arises with the possibility of obtaining an efficient process and low operating cost. In this context, the adsorption separation processes present with wide
applicability. The use of r...
O solo é considerado um dos principais habitats para população e microorganismos com potencial biotecnológico e dentre estes, encontram-se os fungos da classe Zygomicetes, com destaque para os da ordem Mucolares do gênero Cunninghamella. Este estudo teve como objetivo isolar e caracterizar cepas do fungo do gênero Cunninghamella em solo no sul do e...
Resumo – O uso discriminado de agrotóxicos acarreta em uma grande prejuízo a saúdes das pessoas e do meio ambiente. O uso de novos métodos de combate a pragas se faz necessário para o equilíbrio da cadeia produtiva. A utilização de microrganismos no combate a pragas se faz como uma boa alternativa. O trabalho objetivou-se em avaliar o potencial de...
Linhagens de Trichoderma estão bem difundidas nos processos de controle de fitopatógenos, além disto, para promoção do desenvolvimento e crescimento das culturas onde são inoculados, estes benefícios dão-se pela gama de processos desempenhados por este organismo, os processos são classificados em parasitismo, antibiose e competição, além de secreta...
Due to its high agricultural productivity, Brazil is featured in the international scenario. In recent years, the
planted area had great growth, which directly determines the amount of agro-industrial wastes generated.
In addition to high productivity, the Brazilian energy matrix has no indicative as to the viability of
activities related to the re...
Physic nut had a great potential for biodiesel production and
presents higher oil content. The aim of this study was obtain
organogenesis in zygotic embryos and hypocotyls of physic
nut using 6-benzylaminopurine (BAP). Seeds were
disinfected and after then cotyledons were removed; they
were in vitro germinated at 0, 1, 2, 3, 4, 5 and 6 mg.L-1
BAP....
biomaterials. They are found in various sources such as algae, fungi, and the exoskeletons of arthropods. The first reports to be reported about in 1811 were chitin and chitosan on in 1859 and today are quite Relevant due to its wide range of applications including cosmetic field, environmental, food, pharmaceutical, dental and medical. The
countri...
Citric pulp bran was used for the first time as substrate for phytase synthesis under solid-state fermentation. An A. niger FS3 phytase strain was applied in optimization studies. A Plackett-Burman screening design identified significant physicochemical variables. These preselected variables were subsequently optimized using a central composite rot...
Fermentation parameters for phytase produc-tion in column-type bioreactor were monitored using a new data acquisition system. There are a number of studies reporting phytase production in flasks, but a lack of data about microorganism respiration behaviour during phytase production using column bioreactor. The objectives of this work were the monit...
The aim of this research was to evaluate the effect of the pre-culture of leaf explants and the effect of the culture medium for the Agrobacterium tumefaciens resuspension to the explant infection. The media, MS/2 (half strength) and MS N/2 (10.3 mM NH4NO3 and 9.4 mM KNO3) + PGR (1.0 μM TDZ (thidiazuron) and 0.1 μM NAA (1-Naphthaleneacetic acid)) w...
The aim of this work was to evaluate the growth of two clones of Eucalyptus saligna on salt-stress mediated by NaCl in hydroponics. Micropropagated plants of the clones p0 and p1 were acclimatizated and cultivated in hydroponics at 0 and 300 mM NaCl levels. The total length, volume, number, fresh mass and dry mass of the roots, the height,
fresh an...
A cabaça de garrafa tem importância econômica para pequenas e médias fazendas e grande potencial para aplicações industriais. Diferentes estratégias foram testadas para a germinação in vitro de sementes, como luminosidade, escarificação, embebição e adição de ANA (ácido naftalenoacético) e 2,4-D (ácido 2,4-diclorofenoxiacético) no meio de cultura....
Nidularium procerum and Nidularium innocentii belong to the family Bromeliaceae and have ornamental and medicinal characteristics. A procedure for the micropropagation for these bromeliads is described. Seedling explants were cultured on MS media (Murashige and Skoog, 1962), liquid and solid supplemented with 0, 2, 4 and 8μM BAP (6-benzylaminopurin...
The antimicrobial activity of a commercial probiotic culture, Lactobacillus sakei (ATCC 1521) at following concentrations (30, 42, 60, 78 and 90 μg/ml, 105 - 107UFC/mL), temperatures of interaction (4, 10, 20, 30, 37 °C) and initial pH (3.5, 4.0, 4.5, 5.0 and 5.5) were tested against three foodborne pathogens, Escherichia coli, Listeria monocytogen...
The bottle gourd has economial importance for small and medium farms and great potential for industrial applications. Different strategies were tested for the in vitro seed germination, as luminosity, scarification, imbibition and addition of ANA (naftalenoacetic acid) and 2,4-D (2,4-Dichlorophenoxyacetic acid) on the culture medium. Later on, noda...
A análise de crescimento tem sido usada por pesquisadores, na tentativa de explicar diferenças no crescimento, de ordem genética ou resultante de modificações do ambiente e constitui ferramenta eficiente para a identificação de ambientes favoráveis, além de identificar características que, no crescimento inicial, indiquem possibilidade de aumento n...
Development of new techniques for in vitro culture is necessary to optimize and reduce the production costs. The aim of this work was to introduce the bioreactor BIB® (Bioreactor of Immersion by Bubbles) and compare it with conventional culture
and bioreactor RITA® (Recipient with Automatized Temporary Immersion) for In vitro growth of M. alternifo...
This work aimed to evaluate the toxicity of some insecticides compounds on Aedes aegypti and Artemia salina larvae. Bioassays were carried out to evaluate the toxic effect after of 24 and 72 h using the compounds or associations. The LC10, LC50 and LC90 values were obtained and utilized for toxicity comparations. For Ae. aegypti, LC50 were 32.65 mg...
A aclimatização é a fase mais crítica da micropropagação em razão de vários fatores que podem impactar a sobrevivência das plantas. O objetivo deste trabalho foi estabelecer um protocolo de pré-aclimatização seguido de aclimatização em hidroponia para plantas micropropagadas de Eucalyptus saligna. A pré-aclimatização consistiu nos tratamentos: 1) c...
Citric pulp bran was used for the first time as substrate for phytase synthesis under solid-state fermentation. An A. niger FS3 phytase strain was applied in optimization studies. A Plackett-Burman screening design identified significant physicochemical variables. These preselected variables were subsequently optimized using a central composite rot...
The regeneration of transgenic plants of Eucalypt is the largest difficulty for the genetic transformation of this genus; in addition a low rate of transformed plants is reached. The aim of this research was to evaluate acetosyringone (3',5'-Dimethoxy-4'-hydroxyacetophenone) on the co-culture medium during genetic transformation of shoot tips of Eu...
Acclimatization is the most difficult stage of the micropropagation process due to several factors that can affect plant survival. The aim of this work was to develop a protocol for acclimatization of Eucalyptus saligna in hydroponics following a pre-acclimatization stage. The pre-acclimatization consisted of the treatments: 1) control (flasks cove...
The growth analysis has been used by researchers to explain differences in the growth, which can be caused for genetic factors or by environmental modifications and constitutes efficient tool for the identification of favorable environments, besides identifying characteristics in the initial growth, to indicate possibility in the increase of growth...
An efficient selective agent helps to obtain transgenic plants; the most used selective agent for genetic transformation of Eucalypt is kanamycin. The aim of this research was to determine ideal dose of kanamycin in shoot tip and cotyledon explants of E. saligna for use as selective agent in genetic transformation. Two experiments were carried out,...
Fermentation parameters for phytase production in column-type bioreactor were monitored using a new data acquisition system. There are a number of studies reporting phytase production in flasks, but a lack of data about microorganism respiration behaviour during phytase production using column bioreactor. The objectives of this work were the monito...
Aedes aegypti é inseto de grande interesse na Saúde Pública por transmitir o vírus da Dengue, Febre Amarela e Febre Hemorrágica da Dengue. No controle do mosquito utilizam-se inseticidas organoclorados, organofosforados, carbamatos e piretróides que guiam à seleção de insetos resistentes. A combinação de íons metálicos de transição, EDTA, STI e SAP...
The aim of this study was to establish in vitro seedlings from seeds of physic nut (Jatropha curcas L.). The disinfection experiment consisted in factorial arrangement (2x2x3), being seed with tegument and without tegument, liquid and semi solid (6 g L-1 agar) media and three concentrations of NaOCl (1%, 2.5% and 5% ). Seeds were imersed in 70% eth...
This work presents a statistical model of survival analysis for three pathogenic bacterial strains (Escherichia coli, Listeria monocytogenes and Staphylococcus aureus), when treated with neutralized and non-neutralized filtered supernatants broth from cultures of Lactobacillus acidhophilus, Lactobacillus rhamnosus and Lactobacillus sake. Survival a...
The research for new techniques of in vitro cultiva tion is being object of many studies around the wor ld, in order to optimize and decrease production costs of seedlings with agronomical interest. The main goal of this work was to compare different systems of in vitro cultivations using Ananas comosus L. Merril. So, the in vitro gr owth of the pl...
This work is based on the action of communities, with the example Seating Andalúcia in valuing the importance of natural resource management linked to their own desires, seeking to nature conservation and maintenance of biodiversity. Thus, enhance the collection of native fruit in areas of natural occurrence and provide technical assistance is qual...
The objective of this work was to compare different systems on in vitro multiplication of Oncidium leucochilum. The treatments were two types of bioreactors: RITA® and BIB®, both with temporary immersion (30 min each 2 h) and the conventional culture in liquid medium. Culture medium was MS supplemented with 1 mg.L-1 BAP, 0.25 mg.L-1 NAA and 5 μL.L-...
The objective of this work was to compare different systems on in vitro multiplication of Oncidium leucochilum. The treatments were two types of bioreactors: RITA ® and BIB ® , both with temporary immersion (30 min each 2 h) and the conventional culture in liquid medium. Culture medium was MS supplemented with 1 mg.L -1 BAP, 0.25 mg.L -1 NAA and 5...
A study was carried out to identify 11 isolated yeast strains from baru fruit using the commercial API20C AUX® system. Bioethanol production tests were carried out with all strains to identify a good producer. The results were interpreted with excellent identification. Preliminary results demonstrated that Candida guilliermondii and Candida pellicu...
RESUMO - (Plantas medicinais usadas pelas populações indígenas Kaiowá e Guarani na Reserva de Caarapó, Mato Grosso do Sul, Brasil). Estudo etnobotânico realizado com a população indígena Kaiowá/Guarani na Reserva de Caarapó (Mato Grosso do Sul, Brasil) mostrou que 34 espécies vegetais, distribuídas em 22 famílias, têm propriedades medicinais e são...
This ethnobotanical survey carried out with the Kaiowá and Guarani populations in the Caarapó Reserve (Mato Grosso do Sul, Brazil) showed that 34 plant species of 22 families with medicinal properties, are used for treating diverse pathologies. Local names in Portuguese and Guarani are provided, along with therapeutic indications, modes of preparat...
With regard to the new German Federal Law on soil protection as drafted by the German Federal Government a working group of the German Petroleum Industry Association (MWV) has formulated the following position paper on soil contamination by petroleum products. After a description of the various petroleum product groups and their different propertie...
Bei akuten viralen Enzephalitiden stehen die je nach Virusart in sehr unterschiedlichem Umfang ablaufenden direkten, gegen die zellulären Vitalfunktionen gerichteten viralen Mechanismen und immunologischen Wirtsreaktionen meist im Vordergrund ätiologischer Überlegungen zum Krankheitsgeschehen.
