Density Dependent Growth
Mostrando 1-12 de 334 artigos, teses e dissertações.
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1. Tolerance of cowpea cultivars to pre-emergence application of sulfentrazone
ABSTRACT Improved methods of weed control are required to support expansion of large-scale cowpea cultivation in mid-west Brazil. With the aim of testing our hypothesis that the tolerance of cowpea cultivars to sulfentrazone is dose- and genotype-dependent, we assessed the effects of increasing doses (0, 250, 500 and 1,000 g ha-1 of sulfentrazone) on the cul
Rev. Ceres. Publicado em: 2021-02
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2. Second hand tobacco smoke adversely affects the bone of immature rats
OBJECTIVES: To evaluate the influence of secondhand cigarette smoke exposure on longitudinal growth of the tibia of growing rats and some parameters of bone quality. METHODS: Forty female rats were randomly divided into four groups: control: rats were sham exposed; 30 days: rats were exposed to tobacco smoke for 30 days; 45 days: rats were exposed to tobac
Clinics. Publicado em: 2017-12
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3. Algicidal effects of aqueous leaf extracts of neem (Azadirachta indica) on Scenedesmus quadricauda (Turp.) de Brébission
The application of synthetic algaecides for the control of algae produces by-products that are sometimes toxic to the environment. There is a need for natural and cheap alternatives to synthetic algaecides. In the present study, we investigated the potential of aqueous crude extract of Azadirachta indica to inhibit the growth of Scenedesmus quadricauda. Phyt
Acta Bot. Bras.. Publicado em: 2016-03
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4. Evaluation of the antimicrobial activity of chitosan and its quaternized derivative on E. coli and S. aureus growth
Abstract Chitosan is largely known for its activity against a wide range of microorganisms, in which the most acceptable antimicrobial mechanism is found to include the presence of charged groups in the polymer backbone and their ionic interactions with bacteria wall constituents. This interaction suggests the occurrence of a hydrolysis of the peptidoglycans
Rev. bras. farmacogn.. Publicado em: 2016-02
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5. Influence of glyphosate in planktonic and biofilm growth of Pseudomonas aeruginosa
This study evaluated the impact of different concentrations of glyphosate (Rondup®) on planktonic and biofilm growth of P. aeruginosa. Aerobic and anaerobic cultures of P. aeruginosa ATCC®15442 inoculated in MHB + glyphosate (0.845 ppm, 1.690 ppm, 8.45 ppm, 16.90 ppm, 84.50 ppm, 169 ppm, 845 ppm, and 1690 ppm) and cultured in normoxia and anoxia, following
Braz. J. Microbiol.. Publicado em: 2014-09
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6. Soil structure and greenhouse gas production differences between row and interrow positions under no-tillage
No-tillage in Brazil is an efficient agricultural system that improves crop productivity whilst controlling erosion caused to the soil by degradation. However, there is some concern regarding soil compaction. Our objective was to determine whether the function of soil structure in sustaining crop growth was dependent on row and interrow positions in long-ter
Sci. agric. (Piracicaba, Braz.). Publicado em: 2014-04
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7. Effect of pH-induced nanopowder deagglomeration on sintering, microstructure and dielectric properties of Ba0.77Ca0.23TiO3 ceramics
Ba0.77Ca0.23TiO3 ceramics were produced in this work starting from nanopowders synthesized via a polymeric precursor method. By adjusting the pH values of the precursor solutions above 7, it was possible to prepare powders weakly aggregated and with a smaller particle size, both facts which traduced into an enhanced nanopowders' sintering process at comparat
Materials Research. Publicado em: 17/07/2012
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8. AvaliaÃÃo do potencial antitumoral e antiangiogÃnico de novos anÃlogos ftalimÃdicos da talidomida / EVALUATION OF THE ANTITUMOR AND ANTIANGIOGENIC POTENTIAL OF NEW FTHALIMIDES THALIDOMIDE ANALOGUES
The thalidomide was previously used to relieve gastric discomforts during pregnancy, and currently it is used for cancer treatment and inflammatory illnesses. Various phthalimides analogues of thalidomide have been researched for its antiangiogenic and immunemodulatory activity. In previous studies, these analogues showed absence of immunesuppressor activity
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 09/12/2011
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9. Idade e mudanças no crescimento da pescadinha amarela Macrodon atricauda (Günther, 1880) entre 1976 e 2009 no Sul do Brasil / Age and change in growth of the king weakfish Macrodon atricauda (Günther, 1880) between 1976 and 2009 in Souther Brazil.
The coastal demersal sciaenid Macrodon atricauda (Günther, 1880), formerly M. ancylodon (Bloch and Shneider, 1801) was sampled for ageing in four periods (1976-79, 1984-86, 1995-97 and 2006- 09) from commercial fishing and scientific surveys along Southern Brazil (Lat. 30S to 3440S). Maximum observed age was seven but no fish older than five years was sampl
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 15/03/2011
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10. Evaluation of bulk and surfaces absorption edge energy of sol-gel-dip-coating SnO2 thin films
The absorption edge and the bandgap transition of sol-gel-dip-coating SnO2 thin films, deposited on quartz substrates, are evaluated from optical absorption data and temperature dependent photoconductivity spectra. Structural properties of these films help the interpretation of bandgap transition nature, since the obtained nanosized dimensions of crystallite
Materials Research. Publicado em: 2010-12
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11. Intercellular contact-dependent survival of human A549, NCI-H596 and NCI-H520 non-small cell lung carcinoma cell lines
In the present study, we examined the relationship between cell phenotype and cell survival of three human non-small cell lung carcinoma cell lines (A549, NCI-H596 and NCI-H520). Cells in exponential growth at various densities were incubated for 24 h at 37ºC in a 5% CO2 humidified atmosphere and then exposed to UV radiation for 1 min (256 nm, 40 W, source-
Publicado em: 2010
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12. Vigilância etmológica e controle biológico de Lutzomyia longipalpis na Cidade de Mossoró, Rio Grande do Norte. / Surveillance etymological and biological control of Lutzomyia longipalpis in the town of Mossley, Rio Grande do Norte.
The use of biological control with entomopathogenic fungi is a viable alternative to control the vector of visceral leishmaniasis (VL). This study aimed a phlebotomine sandflies survey in Mossoró, Rio Grande do Norte, and its relation with the environmental variables, as well as to evaluate the effects of the fungi, Beauveria bassiana and Metharizium anisop
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 15/07/2009