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Search Results: 1 - 10 of 493021 matches for " E.N. de;Carvalho "
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Plantas daninhas em mandiocais (Manihot esculenta Crantz) na regi?o mineradora de Diamantina (Alto Jequitinhonha), Minas Gerais
Alcantara, E.N. de;Carvalho, D.A. de;
Planta Daninha , 1983, DOI: 10.1590/S0100-83581983000200007
Abstract: a survey of weeds occurring in cassava crops was carried out in the mining region of diamantina, mg. the counties of carbonita, itamarandiba and capelinha were used in the survey and considered to be representative of the region. the degree of abundance and the frequency of weed species were determined. the weeds were identified and most of them are being preserved in the herbarium esal, of the escola superior de agricultura de lavras, mg. the results showed the occurrence of 45 weed species belonging to 19 families, being 16 dycots, 2 monocots and 1 pteridophyta. the families compositae, gramineae, malvaceae, leguminosae, rubiaceae and convolvulaceae and the species acanthospermum australe, sida rhombifolia e borreria alata occurred with high frequency.
FOUNDATIONS OF THE NEW SOUTH AFRICA
E.N. De Agrela
Scientia Militaria : South African Journal of Military Studies , 2012, DOI: 10.5787/25-1-269
Abstract: As a history teacher to Forms 4 and 5 (Standard 9 and 10), John Pampallis found that "a pressing need for a general textbook to cover the South African section of our syllabus" existed. Pampallis set out to document the history of South Africa and the fruits of his labour emerged in the form of his book Foundations of the New South Africa which is written from refreshingly different perspective.
Study of the embryofeto-toxicity of Crown-of-Thorns (Euphorbia milii) latex, a natural molluscicide
Souza, C.A.M.;de-Carvalho, R.R.;Kuriyama, S.N.;Araujo, I.B.;Rodrigues, R.P.;Vollmer, R.S.;E.N., Alves;Paumgartten, F.J.R.;
Brazilian Journal of Medical and Biological Research , 1997, DOI: 10.1590/S0100-879X1997001100011
Abstract: the crude latex of crown-of-thorns (euphorbia milii var. hislopii) is a potent plant molluscicide and a promising alternative to the synthetic molluscicides used in schistosomiasis control. the present study was undertaken to investigate the embryofeto-toxic potential of e. milii latex. the study is part of a comprehensive safety evaluation of this plant molluscicide. lyophilized latex (0, 125, 250 and 500 mg/kg body weight) in corn oil was given by gavage to wistar rats (n = 100) from days 6 to 15 of pregnancy and cesarean sections were performed on day 21 of pregnancy. the numbers of implantation sites, living and dead fetuses, resorptions and corpora lutea were recorded. fetuses were weighed, examined for external malformations, and fixed for visceral examination, or cleared and stained with alizarin red s for skeleton evaluation. a reduction of body weight minus uterine weight at term indicated that e. milii latex was maternally toxic over the dose range tested. no latex-induced embryolethality was noted at the lowest dose (125 mg/kg) but the resorption rate was markedly increased at 250 mg/kg (62.5%) and 500 mg/kg (93.4%). a higher frequency of fetuses showing signs of delayed ossification (control: 17.4%; 125 mg/kg: 27.4% and 250 mg/kg: 62.8%; p<0.05 vs control) indicated that fetal growth was retarded at doses $mvd$:face("symbol") 3 125 mg latex/kg body weight. no increase in the proportion of fetuses with skeletal anomalies was observed at the lowest dose but the incidence of minor skeletal malformations was higher at 250 mg/kg body weight (control: 13.7%; 125 mg/kg: 14.8%; 250 mg/kg: 45.7%; p<0.05 vs control). since a higher frequency of minor malformations was noted only at very high doses of latex which are embryolethal and maternally toxic, it is reasonable to conclude that this plant molluscicide poses no teratogenic hazard or, at least, that this possibility is of a considerably low order of magnitude
Interactions between intracellular Ca2+ stores: Ca2+ released from the NAADP pool potentiates cADPR-induced Ca2+ release
Chini, E.N.;
Brazilian Journal of Medical and Biological Research , 2002, DOI: 10.1590/S0100-879X2002000500005
Abstract: cells possess multiple intracellular ca2+-releasing systems. sea urchin egg homogenates are a well-established model to study intracellular ca2+ release. in the present study the mechanism of interaction between three intracellular ca2+ pools, namely the nicotinic acid adenine dinucleotide phosphate (naadp), the cyclic adp-ribose (cadpr) and the inositol 1',4',5'-trisphosphate (ip3)-regulated ca2+ stores, is explored. the data indicate that the naadp ca2+ pool could be used to sensitize the cadpr system. in contrast, the ip3 pool was not affected by the ca2+ released by naadp. the mechanism of potentiation of the cadpr-induced ca2+ release, promoted by ca2+ released from the naadp pool, is mediated by the mechanism of ca2+-induced ca2+ release. these data raise the possibility that the naadp ca2+ store may have a role as a regulator of the cellular sensitivity to cadpr.
The choice of strategic alternatives to building the capacity of rail
E.N. Chupir
Marketing ì Mened?ment Innovacìj , 2012,
Abstract: The article is devoted to theoretical aspects of the choice of an enterprise development strategy. It is proposed matrix of strategic choice areas for development.
Integrated investment- innovation processes groups of companies: essence and sequence
E.N. Chupyr
Marketing ì Mened?ment Innovacìj , 2012,
Abstract: The authors elucidate the nature, content and implementation stages of an integrated investment -innovation process.
Human factors that derail extension services delivery in developing countries: implications for policy
E.N. Ajani
International Journal of Agricultural Research, Innovation and Technology : IJARIT , 2012,
Abstract: The paper examines human factors derailing extension services delivery in developing countries. Poor management of rewards and incentives; quality of work life; poor assessment system; limited quality of human resource; inadequate extension support training materials; inconsistencies of government programmes; inadequate staff training and poor extension programme evaluation were viewed as major constraints. Considering the role of extension to agricultural development, the paper recommends that efforts should be made by the various stakeholders in agricultural extension services to improve the capability of human resources involved in extension services and highlights the need for government agricultural programmes to be consistent to enable the beneficiaries of such programmes derive the benefits that will boost productivity in agriculture.
Assessment of use of indigenous maize storage practices among farmers in anambra state, Nigeria
E.N. Ajani
International Journal of Agricultural Research, Innovation and Technology : IJARIT , 2012,
Abstract: The study assessed the use of indigenous maize storage practices among farmers in Anambra State, Nigeria. Data for the study was collected by the use of interview schedule from a sample of 60 respondents. Percentage, mean score and standard deviation were used for analyzing data collected for the study. Results revealed that the farmers were using indigenous technologies such as baskets, aerial (over fire) in the kitchen, bare floors, among others in storing maize. The respondents indicated that they stored maize cobs undehusked in order to overcome wastage and obtained information about indigenous storage of maize from parents and fellow farmers. Major problems militating against effective storage of maize include: attack of pests such as rodents and weevils, diseases, termite attack and use of poor quality storage materials. The respondents indicated that use of materials free from termite, clearing of surroundings against fire disaster; use of durable materials treated with insecticides will help to solve the problems. The study recommends that provision of appropriate and affordable storage structures should be made available to the maize farmers in order to avoid wasting of the produce under storage. This will help to ensure food security among rural farm households.
Interactions between intracellular Ca2+ stores: Ca2+ released from the NAADP pool potentiates cADPR-induced Ca2+ release
Chini E.N.
Brazilian Journal of Medical and Biological Research , 2002,
Abstract: Cells possess multiple intracellular Ca2+-releasing systems. Sea urchin egg homogenates are a well-established model to study intracellular Ca2+ release. In the present study the mechanism of interaction between three intracellular Ca2+ pools, namely the nicotinic acid adenine dinucleotide phosphate (NAADP), the cyclic ADP-ribose (cADPR) and the inositol 1',4',5'-trisphosphate (IP3)-regulated Ca2+ stores, is explored. The data indicate that the NAADP Ca2+ pool could be used to sensitize the cADPR system. In contrast, the IP3 pool was not affected by the Ca2+ released by NAADP. The mechanism of potentiation of the cADPR-induced Ca2+ release, promoted by Ca2+ released from the NAADP pool, is mediated by the mechanism of Ca2+-induced Ca2+ release. These data raise the possibility that the NAADP Ca2+ store may have a role as a regulator of the cellular sensitivity to cADPR.
Trends in adjuvant development for vaccines: DAMPs and PAMPs as potential new adjuvants
Miyaji, E.N.;Carvalho, E.;Oliveira, M.L.S.;Raw, I.;Ho, P.L.;
Brazilian Journal of Medical and Biological Research , 2011, DOI: 10.1590/S0100-879X2011007500064
Abstract: aluminum salts have been widely used in vaccine formulations and, after their introduction more than 80 years ago, only few vaccine formulations using new adjuvants were developed in the last two decades. recent advances in the understanding of how innate mechanisms influence the adaptive immunity opened up the possibility for the development of new adjuvants in a more rational design. the purpose of this review is to discuss the recent advances in this field regarding the attempts to determine the molecular basis and the general mechanisms underlying the development of new adjuvants, with particular emphasis on the activation of receptors of innate immune recognition. one can anticipate that the use of these novel adjuvants will also provide a window of opportunities for the development of new vaccines.
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