نتایج جستجو برای: primary and secondary concentrations
تعداد نتایج: 16961641 فیلتر نتایج به سال:
Unsteady hydromagnetic generalised Couette flow of a viscous, incompressible and electrically conducting fluid between two horizontal parallel porous plates Darcian channel in the presence of a uniform transverse magnetic field taking Hall current and ion-slip into account in a rotating system is investigated. An exact solution of the governing equations is obtained by Laplace transform techniq...
In this study, the anesthetic effects of 2-phenoxyethanol (2-PE) on possible primary (cortisol level) and secondary (haematological indices and glucose level) stress responses were studied in silver carp (Hypophthalmichthys molitrix). Fish were first exposed to 0.1, 0.3, 0.5, 0.7 and 0.9 mL/L 2-PE, also the time to induction (deep anesthesia) and recovery were measured. At concentrations of 0.5, ...
An efficient method is described for the mild and rapid tetrahydropyranylation of alcohols and phenols using a catalytic amount of N-chlorosaccharin (1 mol %) and 3, 4-dihydro-2H-pyran under solvent-free condition at room temperature. Benzylic alcohols and phenols containing electron withdrawing or donating groups in various positions of phenyl ring, cinamyl alcohol, primary, ...
writing as a productive skill requires practice in the basic sub-skills of vocabulary and grammar. in fact, grammar has been viewed as the core of programs in writing classes to help the students put the elements of sentence together and combine sentences of specific lengths to come up with an error-free work of art. conceptualizing l2 writing in this way introduces writing as a product and enc...
this study sought to examine the effect of cooperative game on iranian students achievements in english alphabet learning. cooperative games are games, in which players or teams work together towards a common goal without defeating someone. the methodology used in this study was experimental. the population of the study was 60 female students from the grade one in secondary school in tabriz, ir...
این تحقیق به منظور آنالیز همزمان، جهت پایش 7 آفت کش غیر مجاز در خیار شهرستان دره شهر ، با استفاده از روش quechers پایه گذاری شده است. اساس روش برپایه استخراج، با استو نیتریل و پاکسازی نمونه تو سط ماده جاذب سطحی primary secondary amine وgraphite carbone black و شناسایی و تعیین مقدار با استفاده از دستگاه gc/ecd است. برای از بین بردن اثر ماتریکس منحنی کا لیبراسیون ، با استفاده از آنا لیز نمونه های...
ABSTRACT To study the prevalence of infertility, both primary and secondary, also outcome of pregnancy and uptake of medical services about that and some demographic factors in a given population of women. An interview-questionnaire survey of 1200 married women in the age group 40-50 who lived in the west of Tehran. Method of women selection was stratified random sampling. 26 questio...
The Hypertension is divided into two types: primary and secondary. the secondary type, is particularly due to renal and arterial origin and is mostly seen. In children the Secondary hypertension caused by malignancies is rare. This is a case of abdominal rhabdomyosarcoma with malignant hypertension.
Regression models coupled with time series data were used to analyze the contribution of primary and secondary sources to formaldehyde (HCHO) concentrations, as determined by statistical analogy to primary (carbon monoxide, CO) and secondary (ozone, O3) compounds measured simultaneously in Houston, TX. Time series analyses substantiated the need for statistical methods of analysis, given the co...
Objective The main objective of this survey was to determine the difference between primary and secondary infertility in Morocco and the associated factors among women, who are referred to public and private health centers in Morocco. MaterialsAndMethods In this cross-sectional study, 619 infertile women referring to public and private health centers in Marrakech-Safi region, were selected by s...
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