فضای باز مدارس ازجمله فضاهای مهم آن‌ها و محل فعالیت‌هایی چون بازی آموزش است دانش‌آموزان مهارت‌های تحصیلی، محیطی، اجتماعی را در آن می‌آموزند، بنابراین باید تابع مشخصاتی خاص پاسخ‌گوی همۀ نیازهای باشد. اینکه آسایش حرارتی از اساسی‌ترین نیاز برای حضور حیاط است، تأمین ضروری می‌نمایاند. تعیین محدودۀ امری پیچیده مشابه، بسته به تنوع افراد، تجربیات، انتظارات، فرهنگ، سن، جنسیت آن‌ها، متفاوت است. پژوهش حاض...

هدف: عدم توانایی ترمیم خود به‫خودی بافت غضروف به‫دنبال ایجاد آسیب‌ مفصلی، نیازمند یک رویکرد درمانی موثر است. اخیرا نقش وزیکول‌های خارج سلولی (EV) در ارتباطات و از طریق تنظیم فرایندهای مورد توجه قرار گرفته هدف این مطالعه، مقایسه غضروف­زایی EVهای مشتق هم‌کشتی کندروسیت/سلول بنیادی مزانشیمی با نسبت‌های 1 به 2 4 شرایط برون‌تنی مواد روش‌ها: راستا، سلول‌ها جداسازی مشخصه­یابی شدند. محیط‌های رویی سلول‌ه...

The most direct approach for measuring the exchange of biogenic volatile organic compounds between terrestrial ecosystems and the atmosphere is the eddy covari-ance technique. It has been applied several times in the last few years using fast response proton-transfer-reaction mass spectrometry (PTR-MS). We present an independent validation of this technique by applying it to measure the water v...

The potential effect of genetic modification on nutritional properties of potatoes transformed to improve resistance to a necrotic strain of Potato virus Y was determined in a rat experiment. Autoclaved tubers from four transgenic lines were included to a diet in the amount of 40% and compared with the conventional cv. Irga. The experiment lasted 3 weeks and special attention was paid to nutrit...

Incidence of 9 virulence-associated genes and genetic diversity was determined in 79 A. butzleri and 6 A. cryaerophilus isolates from pork, beef, and chicken meat. All A. butzleri isolates harboured the tlyA gene, and most of them carried ciaB, mviN, pldA, cadF, and cj1349 genes. ciaB was found to occur with higher frequency in poultry if compared with pork (p = 0.0007), while irgA was more fre...

Most ocean acidification (OA) experimental systems rely on pH as an indirect way to control CO2. However, accurate pH measurements are difficult to obtain and shifts in temperature and/or salinity alter the relationship between pH and pCO2. Here we describe a system in which the target pCO2 is controlled via direct analysis of pCO2 in seawater. This direct type of control accommodates potential...

Scientists have used numerous techniques to measure organismal metabolic rate, including assays of oxygen (O2) consumption and carbon dioxide (CO2) production. Relatively few studies have directly compared estimates of metabolic rate on the same groups of animals as determined by different assay methods. This study directly compared measures of the metabolic rate of three lines of Drosophila si...

Plants of Brassica juncea L. var. RLC-1 were exposed for 30 days to different concentrations (0, 0.2, 0.4, and 0.6 mM) of cadmium (Cd) to analyze the Cd uptake, H2O2 content, hormonal profiling, level of photosynthetic pigments (chlorophyll, carotenoid, and flavonoid), gaseous exchange parameters (photosynthetic rate, vapour pressure deficit, intercellular CO2 concentration, and intrinsic mesop...

A pvsB-vctA-irgA triple deletion mutant of Vibrio parahaemolyticus can utilize enterobactin under iron-limiting conditions by inducing a previously undescribed receptor, PeuA (VPA0150), in response to extracellular alkaline pH and enterobactin. In silico analyses revealed the existence of a two-component regulatory system operon, peuRS, immediately upstream of peuA, which constitutes an operon ...

O fósforo (P) é um importante nutriente para a produtividade da cultura do arroz. No entanto, ocorre baixa eficiência adubação nos solos Tocantins, e o aumento custos de insumos torna os fosfatos naturais uma alternativa econômica. objetivo deste trabalho foi avaliar características agronômicas na arroz (Oryza sativa) sob efeito doses fosfato natural reativo. experimento realizado em casa veget...