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تعداد نتایج: 6828622 فیلتر نتایج به سال:
Control of size and shape is a challenge in nanoparticle synthesis. Synthetic and biosynthetic (both extracellular and intracellular) methods are used to prepare silver nanoparticle (SNP). In this study, the behavior of three strains of Staphylococcus aureus (S. aureus) was investigated in the presence of silver nitrate intra- and extracellularly. S. aureus strains biosynthesized SNPs intracell...
Introduction: Exposure to 3, 4- methylenedioxymethamphetamine (MDMA) could lead to serotonergic system toxicity in the brain. This system is responsible for learning and memory functions. Studies show that MDMA causes memory impairment dose-dependently and acutely. The present study was designed to evaluate the chronic and acute effects of MDMD on spatial memory and acquisition of passive avoid...
Objective: Diabetic patients are more likely to be infected and are at the higher risk of morbidity and mortality in COVID-19 pandemic. The aim of this study was to compare the preventive behaviours and perceived risk of COVID-19 in women with and without type 2 diabetes mellitus (T2DM). Materials and Methods: The analytical cross-sectional study was conducted from June to July 2020 on 151 par...
One of the few general “theorems” of ecology is the statement that in a given habitat there can be no more species present than the number of limiting resources. Our aim is to examine several of the versions of this “theorem” present in the literature, to compare them and to consider the underlying assumptions and definitions so as to decide to what ecological situations the theorem is applicab...
There is much more to evaluation than collecting, analyzing, and interpreting scientific data in order to compare the outcomes of vious treatments. For the past 40 years, method-related discussions in the field of program evaluation have evolved to include models and reflections on the complex and multiple roles associated with the practice of evaluation. In fact, for Shadish, Cook, & Leviton, ...
the ability to speak two languages in the world is a remarkable achievement. there is a good reason to believe that bilingualism is the norm for the majority of people in the world because 70% of the earth’s population are supposed to be bilingual or multilingual. various investigations have shown that the native language impacts foreign word recognition, and this influence is adapted by the de...
nowadays, air pollution is a global problem that has had significant growth by technology development, population growth andindustrial development. industrial development brought natural resources deterioration, more manufacturing products, and more environmental pollutants. if pollutant won’t be controlled, human-being and wildlife will face the critical risks. significant release and critical...
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