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Id: biblio-843176
Autor: Chávez-Ambriz, Lluvia A; Hernández-Morales, Alejandro; Cabrera-Luna, José A; Luna-Martínez, Laura; Pacheco-Aguilar, Juan R.
Título: Aislados de Bacillus provenientes de la rizósfera de cactus incrementan la germinación y la floración en Mammillaria spp. (Cactaceae) / Bacillus isolates from rhizosphere of cacti improve germination and bloom in Mammillaria spp. (Cactaceae)
Fonte: Rev. argent. microbiol;48(4):333-341, dic. 2016. ilus, tab.
Idioma: es.
Resumo: Las cactáceas son la vegetación característica de las zonas áridas en México, donde las lluvias son escasas, la evapotranspiración es elevada y la fertilidad de los suelos es baja. Las plantas han desarrollado estrategias fisiológicas como la asociación con microorganismos en la zona de la rizósfera para incrementar la captación de nutrientes. En el presente trabajo se obtuvieron 4 aislados bacterianos de la rizósfera de Mammillaria magnimamma y Coryphantha radians, los que fueron nombrados como QAP3, QAP19, QAP22 y QAP24 e identificados genéticamente como pertenecientes al género Bacillus. Estos aislados exhibieron in vitro propiedades bioquímicas como solubilización de fosfatos, producción de ácido indolacético y actividad ACC deaminasa, que se relacionan con la promoción del crecimiento de las plantas. Dicha promoción fue ensayada inoculando semillas de M. magnimamma y evaluando luego algunos parámetros. Se encontró que todos los aislados incrementaron la germinación desde un 17% hasta un 34,3% (con respecto a las semillas testigo sin inocular); el aislado QAP24 fue el que presentó el mayor efecto en este sentido y permitió la germinación de todas las semillas viables (84,7%) 3 días antes que en el testigo. La inoculación de este aislado en plantas de Mammillaria zeilmanniana mostró un efecto positivo sobre la floración: en 2 meses dentro del período de un año se detectó un incremento en el número de plantas en floración con respecto a las plantas testigo, de hasta el 31,0% en uno de ellos. Se concluye que los aislados de Bacillus spp. caracterizados poseen potencial para ser empleados en programas de conservación de especies vegetales de zonas áridas.

Cacti are the most representative vegetation of arid zones in Mexico where rainfall is scarce, evapotranspiration is high and soil fertility is low. Plants have developed physiological strategies such as the association with microorganisms in the rhizosphere zone to increase nutrient uptake. In the present work, four bacterial isolates from the rhizosphere of Mammillaria magnimamma and Coryphantha radians were obtained and named as QAP3, QAP19, QAP22 and QAP24, and were genetically identified as belonging to the genus Bacillus, exhibiting in vitro biochemical properties such as phosphate solubilization, indoleacetic acid production and ACC deaminase activity related to plant growth promotion, which was tested by inoculating M. magnimamma seeds. It was found that all isolates increased germination from 17 to 34.3% with respect to the uninoculated control seeds, being QAP24 the one having the greatest effect, accomplishing the germination of viable seeds (84.7%) three days before the control seeds. Subsequently, the inoculation of Mammillari zeilmanniana plants with this isolate showed a positive effect on bloom, registering during two months from a one year period, an increase of up to 31.0% in the number of flowering plants compared to control plants. The characterized Bacillus spp. isolates have potential to be used in conservation programs of plant species from arid zones.
Descritores: Bacillus/isolamento & purificação
Bacillus/classificação
Adaptação Biológica/fisiologia
Conservação dos Recursos Naturais/métodos
Cactaceae/microbiologia
Rizosfera
Inoculantes Agrícolas/crescimento & desenvolvimento
-Germinação/efeitos dos fármacos
Flores/efeitos dos fármacos
Parâmetros de Referência/métodos
Tipo de Publ: Ensaio Clínico Controlado
Estudo de Avaliação
Responsável: AR635.1 - FCVyS - Servicio de Información y Documentación


  2 / 209 LILACS  
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Id: biblio-1055419
Autor: Bernardo, Bernardete da Silva; Ramos, Rodrigo Ferraz; Callegaro, Kelly; Daroit, Daniel Joner.
Título: Co-production of Proteases and Bioactive Protein Hydrolysates from Bioprocessing of Feather Meal
Fonte: Braz. arch. biol. technol;62:e19180621, 2019. graf.
Idioma: en.
Projeto: CNPq.
Resumo: Abstract: Feather meal conversion through submerged cultivations with Bacillus strains (CL33A, CL14) yielded proteases and protein hydrolysates. After 4-day (CL33A) and 10-day (CL14) cultivations, protease activities reached 461 U/mL; hydrolysates presented antioxidant (radicals-scavenging, 57-77%; Fe2+-chelation, 14-28%; Fe3+-reduction) and antidiabetic (dipeptidyl peptidase-IV inhibition, 49-52%) potentials. The obtained bioproducts present prospective commercial/industrial applications.
Descritores: Bacillus
Biotecnologia/métodos
Hipoglicemiantes
Antioxidantes
-Biodegradação Ambiental
Responsável: BR1.1 - BIREME


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Id: biblio-1045993
Autor: Zeeshan, Nadia; Naz, Saher; Naz, Shumaila; Afroz, Amber; Zahur, Muzna; Zia, Safia.
Título: Heterologous expression and enhanced production of ß-1, 4-glucanase of Bacillus halodurans C-125 in Escherichia coli
Fonte: Electron. j. biotechnol;34:29-36, july. 2018. ilus, tab, graf.
Idioma: en.
Projeto: Higher Education Commission, Pakistan (HEC).
Resumo: Background: Recombinant DNA technology enables us to produce proteins with desired properties and insubstantial amount for industrial applications. Endo-1, 4-ß-glucanases (Egl) is one of the major enzyme involved in degradation of cellulose, an important component of plant cell wall. The present study was aimed at enhancing the production of endo-1, 4-ß-glucanases (Egl) of Bacillus halodurans in Escherichia coli. Results: A putative Egl gene of Bacillus Halodurans was expressed in E. coli by cloning in pET 22b (+). On induction with isopropyl-b-D-1-thiogalactopyranoside, the enzyme expression reached upto ~20% of the cell protein producing 29.2 mg/liter culture. An increase in cell density to 12 in auto-inducing LB medium (absorbance at 600 nm) enhanced ß-glucanase production up to 5.4 fold. The molecular mass of the enzyme was determined to be 39 KDa, which is nearly the same as the calculated value. Protein sequence was analyzed by CDD, Pfam, I TASSER, COACH, PROCHECK Servers and putative amino acids involved in the formation of catalytic, substrate and metal binding domains were identified. Phylogenetic analysis of the ß-glucanases of B. halodurans was performed and position of Egl among other members of the genus Bacillus producing endo-glucanases was determined. Temperature and pH optima of the enzyme were found to be 60°C and 8.0, respectively, under the assay conditions. Conclusion: Production of endo-1, 4 ß-glucanase enzymes from B. halodurans increased several folds when cloned in pET vector and expressed in E. coli. To our knowledge, this is the first report of high-level expression and characterization of an endo-1, 4 ß-glucanases from B. halodurans.
Descritores: Bacillus/enzimologia
Celulases/biossíntese
-Temperatura
Estabilidade Enzimática
Expressão Gênica
Parede Celular/enzimologia
Reação em Cadeia da Polimerase
Clonagem Molecular
Celulases/isolamento & purificação
Celulases/metabolismo
Escherichia coli/metabolismo
Células Vegetais/enzimologia
Concentração de Íons de Hidrogênio
Hidrólise
Responsável: CL1.1 - Biblioteca Central


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Id: biblio-1254696
Autor: Li, Feng; Xie, Yingjie; Gao, Xiang; Shan, Mingxu; Sun, Changchao; Dong Niu, Yan; Shan, Anshan.
Título: Screening of cellulose degradation bacteria from Min pigs and optimization of its cellulase production
Fonte: Electron. j. biotechnol;48:29-35, nov. 2020. ilus, tab, graf.
Idioma: en.
Projeto: Open Project of Northeastern Science Inspection Station and China Ministry of Agriculture Key; . Laboratory of Animal Pathogen Biology; . China Agriculture Research System.
Resumo: BACKGROUND: Cellulose as a potential feed resource hinders its utilization because of its complex structure, and cellulase is the key to its biological effective utilization. Animal endogenous probiotics are more susceptible to colonization in the intestinal tract, and their digestive enzymes are more conducive to the digestion and absorption of feed in young animals. Min pigs are potential sources of cellulase probiotics because of the high proportion of dietary fiber in their feed. In this study, the cellulolytic bacteria in the feces of Min pigs were isolated and screened. The characteristics of enzymes and cellulase production were studied, which provided a theoretical basis for the rational utilization of cellulase and high-fiber food in animal production. RESULTS: In our study, 10 strains of cellulase producing strains were isolated from Min pig manure, among which the M2 strain had the best enzyme producing ability and was identified as Bacillus velezensis. The optimum production conditions of cellulase from strain M2 were: 2% inoculum, the temperature of 35°C, the pH of 5.0, and the liquid loading volume of 50 mL. The optimum temperature, pH and time for the reaction of cellulase produced by strain M2 were 55°C, 4.5 and 5 min, respectively. CONCLUSIONS: Min pigs can be used as a source of cellulase producing strains. The M2 strain isolated from feces was identified as Bacillus velezensis. The cellulase from M2 strain had a good activity and the potential to be used as feed additive for piglets.
Descritores: Porco Miniatura
Bactérias/enzimologia
Celulase/biossíntese
-Bacillus
Fibras na Dieta
Probióticos
Digestão
Fezes
Ração Animal
Limites: Animais
Responsável: CL1.1 - Biblioteca Central


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Texto completo SciELO Chile
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Id: biblio-950732
Autor: Kabir, Md Golam; Rahman, Md Monsor; Ahmed, Nazim Uddin; Fakruddin, Md; Islam, Saiful; Mazumdar, Reaz Mohammad.
Título: Antioxidant, antimicrobial, toxicity and analgesic properties of ethanol extract of Solena amplexicaulis root
Fonte: Biol. Res;47:1-12, 2014. graf, tab.
Idioma: en.
Resumo: BACKGROUND: This study was subjected to investigate different pharmacological properties of ethanol extract ofSolena amplexicaulis root. RESULTS: The extract contains flavonoid, alkaloid, saponin and steroid compounds. The extract exhibited excellent antioxidant activity in DPPH radical scavenging activity. The extract also showed potent activity in brine shrimp lethality bioassay. The LC50 value was found to 44.677 µg/ml. The extract showed better anti-bacterial activity against gram-negative bacteria. In antifungal assay, the maximum 79.31% of anti-mycotic activity was observed against Aspergillus ochraceus while minimum 44.2% against Rhizopus oryzae. MIC value ranged between 1500 - 3000 µg/ml. The extract was found moderately toxic with a 24-hr LD50 value of 81.47 mg/kg in Swiss albino mice. The degree of inhibition by the ethanolic extract of the root was found less than that of standard analgesic drug diclofenac sodium. The extract also showed moderate anti-inflammatory and antinociceptive activity and anti-diabetic property. Reducing power of the extract was comparable with standard ascorbic acid. Moderate in vitro thrombolytic activity, lipid peroxidation inhibition property, metal chelating ability and stress-protective activity was also observed. CONCLUSION: Ethanol extract of Solena amplexicaulis root can be valuable for treatment of different diseases.
Descritores: Extratos Vegetais/farmacologia
Sequestradores de Radicais Livres/farmacologia
Raízes de Plantas/química
Cucurbitaceae/química
Analgésicos/farmacologia
Anti-Infecciosos/farmacologia
-Artemia/efeitos dos fármacos
Aspergillus/efeitos dos fármacos
Saccharomyces cerevisiae/efeitos dos fármacos
Shigella/efeitos dos fármacos
Bacillus/efeitos dos fármacos
Extratos Vegetais/química
Peroxidação de Lipídeos/efeitos dos fármacos
Testes de Sensibilidade Microbiana
Quelantes/farmacologia
Substâncias Redutoras/farmacologia
Fibrinolíticos/farmacologia
Hipoglicemiantes/farmacologia
Dose Letal Mediana
Anti-Inflamatórios/farmacologia
Antibacterianos/farmacologia
Antifúngicos/farmacologia
Antioxidantes/farmacologia
Limites: Animais
Camundongos
Responsável: CL1.1 - Biblioteca Central


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Id: biblio-829669
Autor: Romero, Cintia Mariana; Vivacqua, Cristian Germán; Abdulhamid, María Belén; Baigori, Mario Domingo; Slanis, Alberto Carlos; Allori, María Cristina Gaudioso de; Tereschuk, María Laura.
Título: Biofilm inhibition activity of traditional medicinal plants from Northwestern Argentina against native pathogen and environmental microorganisms
Fonte: Rev. Soc. Bras. Med. Trop;49(6):703-712, Dec. 2016. tab, graf.
Idioma: en.
Projeto: Agencia de Promoción Científica y Tecnológica; . Programa de Investigación de la Universidad Nacional de Tucumán.
Resumo: Abstract: INTRODUCTION: Plants have been commonly used in popular medicine of most cultures for the treatment of disease. The in vitro antimicrobial activity of certain Argentine plants used in traditional medicine has been reported. The aim of this study was to investigate the antimicrobial, anti-biofilm, and anti-cell adherence activities of native plants (Larrea divaricata, Tagetes minuta, Tessaria absinthioides, Lycium chilense, and Schinus fasciculatus) collected in northwestern Argentina. METHODS: The activities of the five plant species were evaluated in Bacillus strains and clinical strains of coagulase-negative Staphylococcus isolated from northwestern Argentina and identified by 16S rDNA. RESULT: Lycium chilense and Schinus fasciculatus were the most effective antimicrobial plant extracts (15.62µg/ml and 62.50µg/ml for Staphylococcus sp. Mcr1 and Bacillus sp. Mcn4, respectively). The highest (66%) anti-biofilm activity against Bacillus sp. Mcn4 was observed with T. absinthioides and L. divaricate extracts. The highest (68%) anti-biofilm activity against Staphylococcus sp. Mcr1 was observed with L. chilense extract. T. minuta, T. absinthioides, and L. divaricata showed percentages of anti-biofilm activity of between 55% and 62%. The anti-adherence effects of T. minuta and L. chilense observed in Bacillus sp. Mcn4 reflected a difference of only 22% and 10%, respectively, between anti-adherence and biofilm inhibition. Thus, the inhibition of biofilm could be related to cell adherence. In Staphylococcus sp. Mcr1, all plant extracts produced low anti-adherence percentages. CONCLUSION: These five species may represent a source of alternative drugs derived from plant extracts, based on ethnobotanical knowledge from northwest Argentina.
Descritores: Plantas Medicinais/química
Staphylococcus/efeitos dos fármacos
Bacillus/efeitos dos fármacos
Extratos Vegetais/farmacologia
Biofilmes/efeitos dos fármacos
-Argentina
Plantas Medicinais/classificação
Testes de Sensibilidade Microbiana
Adesão Celular/efeitos dos fármacos
Biofilmes/crescimento & desenvolvimento
Anacardiaceae/química
Tagetes/química
Lycium/química
Larrea/química
Microbiologia Ambiental
Limites: Humanos
Responsável: BR1.1 - BIREME


  7 / 209 LILACS  
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Id: biblio-1132203
Autor: Gois, Ian Mateus; Santos, Alana Mayara; Silva, Cristina Ferraz.
Título: Amylase from Bacillus sp. Produced by Solid State Fermentation Using Cassava Bagasse as Starch Source
Fonte: Braz. arch. biol. technol;63:e20170521, 2020. tab, graf.
Idioma: en.
Resumo: Abstract Amylases are enzymes involved in starch hydrolysis, generating the most diverse products, such as maltose, glucose and dextrins. This work aimed the study of the production of amylolytic enzymes via solid-state fermentation (SSF) using "crueira", an essentially starchy cassava residue, as substrate-support and Bacillus sp. as microorganism. For the implementation of the experimental part, a Central Composite Design (CCD) with three variables (initial moisture, pH and temperature) was made. Each test was examined at 24, 48 and 72 hours by the method of starch dextrinizing activity. The optimum production conditions were 60% initial moisture, pH 6 and 37 °C. The maximum yield was 437.76 U/g in 72 hours of fermentation. The optimum temperature of enzyme performance was 65 °C. The pH optimum range was 4 to 6. The Co2 +, Ca2 + and K+ ions positively influenced the activity of enzymes and the Fe2+ ion had no effect on enzymatic activity. On the other hand, the ions Hg2+, Zn2+, Cu2+, Mn2+ and Mg2+ adversely influenced enzymatic activity. Therefore, producing amylases from Bacillus sp. and using crueira as a substrate is possible.
Descritores: Bacillus/enzimologia
Manihot/metabolismo
Amilases/biossíntese
-Amido/metabolismo
Análise de Variância
Fermentação
Limites: Animais
Responsável: BR1.1 - BIREME


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Id: biblio-1153295
Autor: Abdelkrim, Tifrit; El-Mokhtar, Drici Amine; Radia, Abiayad; Bouziane, Abbouni.
Título: Screening and Characterization of Bacillus Strains Producing Highly Thermostable Amylase from Various Hot Springs of Algeria
Fonte: Braz. arch. biol. technol;64:e21190020, 2021. tab, graf.
Idioma: en.
Resumo: HIGHLIGHTS Screening extremophile Bacillus strains from various Hot Springs Characterization Of Bacillus Strains Producing Highly Thermostable Amylase Genetic identification of the best strains

Abstract Currently thermostable Amylase represents a broad biotechnological interest and desired by a various industries. In this study, forty-six bacterial strains belonging to the genus Bacillus were isolated from various hot springs in the North West of Algeria based on their ability to degrade starch and produce amylase in Starch Agar medium. The majority of isolates showed a positive amylolytic activity. In order to select the most thermostables amylase the effect of temperature on enzymes was estimated, therefore the study of amylase thermostability was culminated by the selection of Four Strains having an interesting optimum of activity and range of stability, reaching 75 °C for the strains HBH1-2, HBH1-3, HBH3-1and 85 °C for the strain HC-2, This indicates that the Enzyme produced by retained strains have optimum activity at high temperature. The identity of the selected strains was established on the basis of the morphological, biochemical characteristics and phylogenetic position as determined by 16S Ribosomal DNA gene sequencing. The whole strains belonged to the genus Bacillus and their phylogeny were also reported in this study.
Descritores: Bacillus/isolamento & purificação
Bacillus/classificação
Fontes Termais/microbiologia
Amilases
-Filogenia
Bacillus/genética
RNA Ribossômico 16S
Argélia
Temperatura Alta
Tipo de Publ: Revisão
Responsável: BR1.1 - BIREME


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Id: biblio-1146421
Autor: Toledo, Adrieli Gorlin; Souza, Juliete Gomes de Lara de; Silva, Jéssica Patrícia Borges da; Favreto, Wagner Alex Jann; Costa, Willian Ferreira da; Pinto, Fabiana Gisele da Silva.
Título: Chemical composition, antimicrobial and antioxidant activity of the essential oil of leaves of Eugenia involucrata DC / Composição química, atividade antimicrobiana e antioxidante do óleo essencial das folhas de Eugenia involucrata DC
Fonte: Biosci. j. (Online);36(2):568-577, 01-03-2020. tab.
Idioma: en.
Resumo: In the Myrtaceae family, the species Eugenia involucrata DC., popularly known as "cerejeira-do-mato", is traditionally used for the antidiarrheal and digestive action of its leaves. However, no studies were found in the literature regarding its antimicrobial and antioxidant potential. In this context, the objective of the present study was to determine the chemical composition by gas chromatography coupled to mass spectrometry (GC-MS) to evaluate the antimicrobial activity by the broth microdilution technique and the antioxidant activity by the 2,2-diphenyl-1-picryl-hydrazila (DPPH) method of the essential oil of E. involucrataleaves. GC-MS identified 28 compounds, all sesquiterpenes, corresponding to 89.41% of the essential oil. The antimicrobial activity of the essential oil was observed for all Gram-positive bacteria tested (Staplylococcus epidermidis, Enterococcus faecalis,Bacillus subtilis and Staplylococcus aureus) and for yeast Candida albicans. The essential oil presented a reduction capacity of DPPH up to 66.81%, evidencing its antioxidant potential. It is suggested that the antimicrobial and antioxidant action of E. involucrata essential oil is related to the presence of the major compounds, elixene (26.53%), ß-caryophyllene (13.16%), α-copaene (8.41%) and germacrene D (7.17%).

Na família Myrtaceae, a espécieEugenia involucrata DC. popularmente denominada "cerejeira-do-mato" é conhecida tradicionalmente pela ação antidiarreica e digestiva de suas folhas. Contudo, na literatura não foram encontrados trabalhos referentes ao seu potencial antimicrobiano e antioxidante. Neste contexto, o objetivo do presente estudo foi determinar a composição química por cromatografia gasosa acoplada a espectrometria de massas (CG-EM) e avaliar a atividade antimicrobiana pela técnica de microdiluição em caldo e a atividade antioxidante pelo método do 2,2-difenil-1-picril-hidrazila (DPPH) do óleo essencial das folhas de E. involucrata. A CG-EM identificou 28 compostos, todos sesquiterpenos, correspondendo a 89,41% do óleo essencial. A atividade antimicrobiana do óleo essencial foi observada para todas as bactérias Gram-positivas testadas (Staplylococcus epidermidis, Enterococcus faecalis,Bacillus subtilise Staplylococcus aureus) e para a levedura Candida albicans. O óleo essencial apresentou capacidade redutora de radicais DPPH de até 66,81%, evidenciando sua potencialidade antioxidante. Sugere-se que a ação antimicrobiana e antioxidante do óleo essencial de E. involucrata esteja relacionada à presença dos compostos majoritários, elixeno (26,53%), ß-cariofileno (13,16%), -copaeno (8,41%) e germacreno D (7,17%).
Descritores: Myrtaceae
Eugenia
Anti-Infecciosos
Antioxidantes
-Espectrometria de Massas
Bacillus
Bactérias
Produtos Biológicos
Candida albicans
Óleos
Destilação
Cromatografia Gasosa
Enterococcus faecalis
Compostos Orgânicos Voláteis
Responsável: BR396.1 - Biblioteca Central


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Id: biblio-1146668
Autor: Blanco, Neder Henrique Martinez; Barbosa, Danilo Ferreira Ramirez; Graichen, Felipe André Sganzerla.
Título: Antagonistic microorganisms and nitrogen fertilization in control of tomato southern blight
Fonte: Arq. Inst. Biol;88:e00502019, 2021. ilus, graf.
Idioma: en.
Projeto: Coordenação de Aperfeiçoamento de Pessoal de Nível Superior; . Universidade Estadual de Mato Grosso do Sul/FUNDECT.
Resumo: The present study assessed the efficacy of formulated biocontrol agents and nitrogen fertilization on southern blight control. Antagonism test in vitro was performed to assess the inhibitory activity of Bacillus methylotrophicus and Trichoderma asperellum against the growth of Sclerotium rolfsii. Tomato seedlings were transplanted into the substrate added with ammonium nitrate doses and inoculated with the formulated biocontrol agents Ônix (B. methylotrophicus) or Quality (T. asperellum). Subsequently, seedlings were inoculated with S. rolfsii. Plant mortality, shoot and root weight were assessed 11 days after the last inoculation. Agents had effective inhibitory activity against S. rolfsii; thus, they could reduce southern blight severity when combined with ammonium nitrate. However, plant mortality was not reduced by them.(AU)
Descritores: Bacillus
Trichoderma
Lycopersicon esculentum
-Técnicas In Vitro
Controle Biológico de Vetores
Compostos de Amônio
Responsável: BR1942.1 - NID - Biblioteca - Núcleo de Informação e Documentação



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