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Search Results: 1 - 10 of 422537 matches for " Z.M.; Trujillo "
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Metodologías para la extracción de virus provenientes de semillas de caraota (Phaseolus vulgaris L.) y frijol (Vigna unguiculata (L.) Walp.).
Pe?a P.,Z.M.; Trujillo,G.;
Revista de la Facultad de Agronomía , 2006,
Abstract: in venezuela from 1980 the presence of pathogenic microorganisms like bacterium, fungi and virus has been indicated in most of the seeds of studied fabaceas, includes: commercial, registered, foundation, experimental; the used methods to guarantee the health of the seed, do not include tests that allow to extract the virus, do not exist registries nor knowledge in general of the introduction of viruses diseases seed borne in our country, in spite of the relevance of this form of transmission. more of 50% of the important diseases in bean (phaseolus vulgaris l.) and in cowpea (vigna unguiculata (l.) walp.) more than 15 virus, seed borne transmission. for that reason, a volume was taken from 53 samples of seeds of bean and cowpea experimental, certified and common type originating of the states aragua, falcón, guárico, lara, portuguesa, and sucre as well as of argentina, chile, colombia, canada and the usa; to be processed in the extraction of virus. two protocols were used for virus extraction: the first one, an observation of viral symptoms in the first fully expanded trifoliate leaf; the second a mechanical inoculation of indicator plants using seed flour. both methodologies confirmed the presence of virus. for bean seeds, 25% of the total experimental type showed viral infection, bean seeds certified 28,6%, bean common 23,1% and 16,6% of the total imported seeds. in cowpea seed, viral infection was detected in common seed (55,5%). the methodologies verify the percentage of viral infection of the material of sowing of different areas from the country and its application will lead to establish controls that prevent the dissemination and use of material with a high viral degree of contamination.
Metodologías para la extracción de virus provenientes de semillas de caraota (Phaseolus vulgaris L.) y frijol (Vigna unguiculata (L.) Walp.). Extraction methodologies of seed borne viruses in beans (Phaseolus vulgaris L.) and cowpea (Vigna unguiculata (L.) Walp.).
Z.M. Pe?a P.,G. Trujillo
Revista de la Facultad de Agronomía , 2006,
Abstract: En Venezuela desde 1980 se ha se alado la presencia de microorganismos patógenos como bacteria, hongos y virus en la mayoría de las semillas de leguminosas estudiadas, incluye: comercial, registrada, fundación, experimental; y los métodos empleados para garantizar la sanidad de la semilla, no incluyen pruebas que permitan extraer los virus, no existen registros ni conocimiento en general de la introducción de enfermedades virales vía semilla en nuestro país, a pesar de la relevancia de esta forma de transmisión. Más del 50% de las enfermedades importantes en caraota (Phaseolus vulgaris L.) y en fríjol (Vigna unguiculata (L.) Walp.) más de 15 virus, se trasmiten por semillas. Por ello, se tomó un volumen de 53 muestras de semillas de caraota y fríjol tipo experimental, certificada y común provenientes de los Estados Aragua, Falcón, Guarico, Lara, Portuguesa, y Sucre así como de Argentina, Chile, Colombia, Canadá y USA; para ser procesadas en la extracción de virus. Empleando dos protocolos, el primero, la observación de síntomas virales en la primera hoja trifoliada plenamente expandida y el segundo, la inoculación mecánica de plantas indicadoras con harina de semillas; ambos confirmaron la presencia de virus. En caraota tipo experimental el 25% resultaron con infección viral, en caraota certificada el 28,6%, en caraota común el 23,1% y en semilla importada en el 16,6% presentó infección viral. En cuanto a fríjol, se detectó infección viral en semilla común (55,5 %). Las metodologías comprueban el porcentaje de infección viral del material de siembra de diferentes áreas del país y su aplicación conducirá a establecer controles que impidan la diseminación y uso de material con un alto grado de contaminación viral. In Venezuela from 1980 the presence of pathogenic microorganisms like bacterium, fungi and virus has been indicated in most of the seeds of studied fabaceas, includes: commercial, registered, foundation, experimental; the used methods to guarantee the health of the seed, do not include tests that allow to extract the virus, do not exist registries nor knowledge in general of the introduction of viruses diseases seed borne in our country, in spite of the relevance of this form of transmission. More of 50% of the important diseases in bean (Phaseolus vulgaris L.) and in cowpea (Vigna unguiculata (L.) Walp.) more than 15 virus, seed borne transmission. For that reason, a volume was taken from 53 samples of seeds of bean and cowpea experimental, certified and common type originating of the States Aragua, Falcón, Guárico, Lara, Portuguesa, and Sucre
Childhood Abuse among Children Involved in Prostitution in Malaysia
Z.M. Lukman
The Social Sciences , 2013,
Abstract: The current study is aim to investigate the link between childhood abuse and the involvement of children in prostitution. Two methods of data collection were used in this study; that is semi-structured interview and narrative interview. Altogether, 63 young women safeguarded from prostitution in two rehabilitation centres participated in this study as respondents. The findings suggest that the vast majority of prostituted young women in this sample are being emotionally and physically abused and half of them are being sexually abused during childhood before they were drawn into prostitution. Around 67% of respondents were found to have suffered from multiple abuse types. Furthermore, the majority of respondents (78.8%) did suffer from multiple negative feelings like feel hurt and angry, depressed, disowned by the family, dirty, useless and wanting revenge.
ANISOTROPY OF (1× 1)-SURFACE FREE ENERGIES OF CRYSTALS
Z.M.,Yu
金属学报(英文版) , 2001,
Abstract: 1. IntroductionInterest in the surface free energy (SFE) of crystals is increasing as a consequence ofmodern experiments in the fields such as crystal growth, crystalline morphology, equilibra-tion of grain boundaries, sintering, adsorption and surface catalysis and .t.1--2].It is well known that the SFE of a crystal is generally dependent on the orientation ofthe surface3]. Some previous works have been done to calculate and measure the SFEl4--8].But, a generally theoretical method is s…
Marketing research-level marketing and logistics operation of the machine-building enterprises of Khmelnitsky region
Z.M. Andrushkevich
Marketing ì Mened?ment Innovacìj , 2011,
Abstract: The article defines the role of marketing research in the analysis of marketing and logistics industries. The necessity of conducting regular market research. Presents the results of market research to determine the level of marketing and logistics activities of industrial enterprises of Khmelnitsky region, identified weaknesses practical use of marketing and logistics functions in the enterprise.
The Effect of Cowpea Oligosaccharides on Gas Production in Adult Rats
Z.M. Ofuya
Asian Journal of Plant Sciences , 2006,
Abstract: The effect of cowpea oligosaccharides and oligosaccharide free meal on gas production in adult female weanling rats was studied. The pattern of hydrogen produced in 24 h when some other rats were fed raw cowpea meal was also studied. In the study on the pattern of hydrogen produced in 24 h in rats fed raw cowpea meal, maximum rate of hydrogen production occurred between 2-8 h. There was considerable variability in the amount of hydrogen produced between rats. After 8 h, hydrogen production declined. When adult rats were fed a basal diet, a diet containing oligosaccharide free (OFR) meal and OFR plus the alcoholic extract; the basal diet produced an average of 1.3 mL H2 over an 8 h period. Diets containing OFR resulted in a three-fold increase in gas production whereas the addition of cowpea alcoholic extract to the OFR resulted in a higher but variable hydrogen production. The oligosaccharides were responsible for approximately 50% of the total gas produced when whole cowpeas were ingested. The highest rate of hydrogen production was found to occur between 2-7 h after feeding.
EFFECT OF IMMUNOMODULATOR DARAPRIM ON POTENTIATION OF VACCINE PROTECTION OF LEISHMANIA MAJOR IN BALB/c MICE
M Keshavarzi,Z.M. Hassan
Iranian Journal Of Allergy, Asthma and Immunology , 2003,
Abstract: In this study, a crude leishmanial antigen, was prepared by sonicating Leishmania major promastigotes used to induce immunity in BALB/c mice against cutaneous leishmaniasis. Correlation between the route of antigen injection and the efficacy of induced protection was examined. To enhance the effectiveness of the antigen, an immunostimulant drug, daraprim (pyrimethamine), was administered simultaneously with the antigen. The experiment demonstrated that simultaneous intraperitoneal injection of the antigen and daraprim resulted in protection from subsequent development of cutaneous lesions. Results of lymphocyte proliferation from mice immunized with either the antigen or antigen-daraprim mixture showed a signficant response to the antigen. The results suggest that daraprim can be used in prophylaxis programs to enhance the effectiveness of vaccines for cutaneous leishmaniasis.
The Effect of the Dexamethsone on Sperm Characteristic and Testosterone Level on Awassi Rams
Z.M.Y. Alkass
Journal of Animal and Veterinary Advances , 2012,
Abstract: The aim of this study, was to determine the effects of dexamethasone on sperm characteristics (volume, mass motility, individual motility, sperm concentration, osmotic pressure) and testosterone activity of serum. In this study, 9 healthy Awassi rams, at the age of 3-5 years and weighing between 50-60 kg, were used. The rams were randomly divided into 2 groups (4 in control group and 5 in treatment group). Dexamethasone was administered intramuscularly at a dose of 4 mg ram 1 once weekly for 3 weeks, semen samples were collected from the rams 2, 24 and 48 h after each injection weekly and examined for sperm characteristics. The results showed that the use of dexamethasone caused significant (p<0.05) increase in semen volume, mass motility and individual sperm motility as compared to the control group. There was no significant correlation (p<0.05) in semen osmotic pressure and sperm concentration. Blood samples were collected from the ram before treatment, after 10 and 25 days of treatment and examined for serum testosterone. The result showed there are significant difference (p<0.05) after 25 days after treatment when compared with the control group.
Thermal stability of properties in silver – rare earth metals alloys
W. G?uchowski,Z.M. Rdzawski
Journal of Achievements in Materials and Manufacturing Engineering , 2008,
Abstract: Purpose: The objective of this work was to investigate the changes taking place in the structure and properties of Ag-La (0.5%) and Ag-mishmetal (1 and 4%) alloys caused by severe plastic deformation compared to the Ag+(7.5 wt %)Cu alloy and pure Ag materials.Design/methodology/approach: Tests were made with the samples obtained casting and further plastic working included KOBO extrusion process and drawing. Wires were annealed in temperature range 50-500oC. The mechanical properties (at room temperature, elevated temperature and after annealing) and microstructure were examined (by the optical, scanning and transmission electron microscopy with EDS and electron diffraction analysis).Findings: Structure of the extruded material was fine and homogenous. The alloys with an addition of lanthanum or mishmetal had high electrical conductivity, which was decreasing with an increase in the content of alloy additives. Fine coherent precipitates were found on the preferred planes in the silver matrix.Practical implications: The alloy with an addition of La or mishmetal could be considered, after further investigations, as a material suitable for use in the production of electrical or electronic components operating at elevated temperatures or exposed to temperature changes.Originality/value: This work has demonstrated that the properties of newly designed silver alloys with an addition of La or mishmetal exhibit temperature stability. It can be concluded from this study that an addition of rare earth metals to silver gives three main benefits: deoxidation during melting in an open furnace, very fine structure and precipitation hardening. The dispersion hardening with coarse particles (size about several μm) is very small. The wire made from this material could be easily produced by the developed processing methods, without the need to use annealing operations.
Fresh-Brine Water Effect on the Basic Engineering Properties of Lisan Marl-Dead Sea-Jordan
Z.M. Mansour,M.R. Taha,Z. Chik
Journal of Applied Sciences , 2008,
Abstract: A recent and largest dike body constructed in Lisan peninsula, Jordan to retain the brine pumped from the Dead Sea is composed of marl. Investigating the properties of the marl and the influence of using brine/fresh water on the engineering behavior of this material is important, particularly during the design and construction stage in order to identify, evaluate and avert unforeseen problems. Techniques to be used to determine the engineering properties of Lisan Marl shall take into consideration the presence of soluble minerals in this soil. The properties considered in this study were mineralogy, grain size distribution, consistency limits, moisture content-dry density relationship (Proctor test), specific gravity and unconfined compressive strength. The results showed that brine water significantly increased the maximum dry density, while the optimum moisture content, liquid limit and the fine particles were decreased upon using brine for sample treatment compared with tests fresh/distilled water. The unconfined compressive strength recorded higher values upon molding the samples with fresh water.
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