Grow When Required
Mostrando 1-12 de 198 artigos, teses e dissertações.
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1. Effect of sulfonylurea tribenuron methyl herbicide on soil Actinobacteria growth and characterization of resistant strains
ABSTRACT Repeated application of pesticides disturbs microbial communities and cause dysfunctions on soil biological processes. Granstar® 75 DF is one of the most used sulfonylurea herbicides on cereal crops; it contains 75% of tribenuron-methyl. Assessing the changes on soil microbiota, particularly on the most abundant bacterial groups, will be a useful a
Braz. J. Microbiol.. Publicado em: 2018-03
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2. Lianas of Seasonally Dry Forest: Ecophysiology and Use in Restoration Ecology / Lianas da floresta estacional semidecidual: ecofisiologia e uso em restauração ecológica
Lianas are important components of the structure and dynamics in seasonally dry forests, but there are few studies on their ecophysiology and use in restoration ecology. The objective of this study was to evaluate the ecophysiology of seeds and juveniles of species of liana in the preferences for environmental regeneration and the variables involved in using
Publicado em: 2010
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3. Mapa auto-organizÃvel com campo receptivo adaptativo local para segmentaÃÃo de imagens
A new self-organizing map with variable topology is introduced for image segmentation. The proposed network, called Local Adaptive Receptive Field Self-organizing Map (LARFSOM) is based on the Self-organizing Map (SOM) and Grow When Required (GWR). The model main features are: adaptive final number of nodes, variable topology, new node insertion based on sim
Publicado em: 2007
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4. Edwardsiella ictaluri Encodes an Acid-Activated Urease That Is Required for Intracellular Replication in Channel Catfish (Ictalurus punctatus) Macrophages▿
Genomic analysis indicated that Edwardsiella ictaluri encodes a putative urease pathogenicity island containing the products of nine open reading frames, including urea and ammonium transporters. In vitro studies with wild-type E. ictaluri and a ureG::kan urease mutant strain indicated that E. ictaluri is significantly tolerant of acid conditions (pH 3.0) bu
American Society for Microbiology (ASM).
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5. Role for Emulsan in Growth of Acinetobacter calcoaceticus RAG-1 on Crude Oil
When Acinetobacter calcoaceticus RAG-1 was grown together with an emulsan-deficient mutant on crude oil, only the emulsan-producing RAG-1 was found to grow, regardless of whether the medium was supplemented with emulsan. The results suggested that the cell-associated form of the bioemulsifier is the biologically active species required for growth on crude oi
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6. Neisseria gonorrhoeae Heme Biosynthetic Mutants Utilize Heme and Hemoglobin as a Heme Source but Fail To Grow within Epithelial Cells
Many bacterial pathogens, including pathogenic neisseriae, can use heme as an iron source for growth. To study heme utilization by Neisseria gonorrhoeae, two heme biosynthetic mutants were constructed, one with a mutation in hemH (the gene encoding ferrochelatase) and one with a mutation in hemA (the gene encoding γ-glutamyl tRNA reductase). The hemH mutant
American Society for Microbiology.
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7. Sinorhizobium meliloti Cells Require Biotin and either Cobalt or Methionine for Growth
Sinorhizobium meliloti is usually cultured in rich media containing yeast extract. It has been suggested that some components of yeast extract are also required for growth in minimal medium. We tested 27 strains of this bacterium and found that none were able to grow in minimal medium when methods to limit carryover of yeast extract were used during inoculat
American Society for Microbiology.
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8. Glutamate is required to maintain the steady-state potassium pool in Salmonella typhimurium.
In many bacteria, accumulation of K+ at high external osmolalities is accompanied by accumulation of glutamate. To determine whether there is an obligatory relationship between glutamate and K+ pools, we studied mutant strains of Salmonella typhimurium with defects in glutamate synthesis. Enteric bacteria synthesize glutamate by the combined action of glutam
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9. A functional insulin-like growth factor I receptor is required for the mitogenic and transforming activities of the epidermal growth factor receptor.
When wild-type mouse embryo cells are stably transfected with a plasmid constitutively overexpressing the epidermal growth factor (EGF) receptor (EGFR), the resulting cells can grow in serum-free medium supplemented solely with EGF. Supplementation with EGF also induces in these cells the transformed phenotype (growth in soft agar). However, when the same EG
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10. Saccharomyces Cerevisiae S288c Has a Mutation in Flo8, a Gene Required for Filamentous Growth
Diploid strains of baker's yeast Saccharomyces cerevisiae can grow in a cellular yeast form or in filaments called pseudohyphae. This dimorphic transition from yeast to pseudohyphae is induced by starvation for nitrogen. Not all laboratory strains are capable of this dimorphic switch; many grow only in the yeast form and fail to form pseudohyphae when starve
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11. Oxygen-tolerant Strain of Chlorella sorokiniana
An oxygen-tolerant strain (OTS) of Chlorella sorokiniana was isolated by growing and continuously subculturing the oxygen-sensitive strain (OSS) in growth medium bubbled continuously with 95% O2-5% CO2. Under these conditions, 6 to 8 hr were required before the OSS began to grow. The growth rates of the OTS and the OSS were the same when grown in an atmosphe
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12. Aspergillus has distinct fatty acid synthases for primary and secondary metabolism
Aspergillus nidulans contains two functionally distinct fatty acid synthases (FASs): one required for primary fatty acid metabolism (FAS) and the other required for secondary metabolism (sFAS). FAS mutants require long-chain fatty acids for growth, whereas sFAS mutants grow normally but cannot synthesize sterigmatocystin (ST), a carcinogenic secondary m
The National Academy of Sciences of the USA.