نتایج جستجو برای: temperature and potential temperature

تعداد نتایج: 16992075  

Journal: :پژوهش های جغرافیای طبیعی 0
سید کاظم علوی پناه محمدرضا سراجیان کمال خدایی

the highest temperatures of the world are recorded in dry and warm climates. this can especially be observed in deserts, where vegetations and soil moisture are very low. as a result, the soil surface receives high thermal energy and its temperature rises up. the lut desert has the above characteristics, making it a suitable environment to prepare land surface temperature (lst) models. objectiv...

So far, several models have been proposed for estimating different climate parameters, but due to the lack of valid and long-term data in some meteorological stations, some models have been difficult to use. The SIMETAV V.1.0 model has been developed in cooperation with the University of California Davis and the Water Resources Authority of California in 2005. The SIMETAW model is a new and inn...

ژورنال: علوم آب و خاک 2020

Given the climatic changes and threats to food security in recent years, they have have become a major issue in agricultural climatology. The present study aimed to investigate the status of agricultural climate suitable for the cultivation of rice in the light of the influential climatic conditions in the past. Given the effect of temperature and the amount of precipitations on rice growth and...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه رازی - دانشکده علوم 1392

a novel acrylic acid-functionalized fe3o4 magnetic nanoparticle with a core-shell structure was developed for utilization as a heterogeneous organosuperacid in chemical transformations. the structural, surface, and magnetic characteristics of the nanosized catalyst were investigated by various techniques such as transmission electron microscopy (tem), thermogravimetric analysis (tga), and ft-ir...

Journal: :iranian journal of pharmacology and therapeutics 0
a. pandurangan rl. khosa s. hemalatha

the methanol extract of ichnocarpus frutescens r.br. root (meif) was evaluated for its anti-pyretic potential on normal body temperature and yeast-induced pyrexia in albino rats. yeast suspension (10 ml/kg body wt.) increased rectal temperature 19 h after subcutaneous injection. the meif, at doses of 100, 200, and 300 mg/kg body wt., p.o., produced significant reduction in normal body temperatu...

Journal: :علوم گیاهان زراعی ایران 0
آرش مامدی دانشجوی کارشناسی ارشد علوم و تکنولوژی بذر، پردیس کشاورزی و منابع طبیعی دانشگاه تهران رضا توکل افشاری استاد، گروه زراعت و اصلاح نباتات، پردیس کشاورزی و منابع طبیعی دانشگاه تهران نیازعلی سپهوند استادیار، مؤسسة تولید و اصلاح بذر و نهال، کرج مصطفی اویسی استادیار گروه زراعت و اصلاح نباتات، پردیس ابوریحان، دانشگاه تهران

quinoa (chenepodium quinoa willd) is a grain-like crop which has a high production potential in iran. due to its seeds high nutritional value, it is compared with milk by the fao. in order to study the effects of temperatures on seed germination of quinoa seeds under salinity stress conditions, an experiment was conducted in seed lab of the university of tehran in karaj. temperatures regimes in...

Journal: :آب و خاک 0
نسرین سیاری محمد بنایان امین علیزاده محمدباقر بهیار

abstract accurate prediction of hourly minimum temperature is required for various crop models which simulate photosynthesis and transpiration. such data can be used for crop protection and reducing the crops injuries due to freezing as well. our objective of this study is employing trigonometric and pattern recognition (k-nn) approaches to evaluate their potential in prediction of hourly tempe...

Journal: :Ergonomics 2002
June J Pilcher Eric Nadler Caroline Busch

A meta-analysis to mathematically summarize the effect of hot and cold temperature exposure on performance was completed. The results from 515 effect sizes calculated from 22 original studies suggest that hot and cold temperatures negatively impact performance on a wide range of cognitive-related tasks. More specifically, hot temperatures of 90 degrees F (32.22 degrees C) Web Bulb Globe Tempera...

Farhad Forouharmajd, Hasan Ebrahimi, Siamak Pourabdian,

Background and Aim: Considering the great advances and extensive use of cell phones and its effects on the human communications and interactions, investigation of potential negative effects of cell phones on the users' health is necessary. The aim of this study was to determine the effect of the distance between cell phones and brain tissue on the temperature of the central and gray matters of ...

Journal: :iranian journal of basic medical sciences 0
elham khodaverdi department of pharmaceutics, school of pharmacy, mashhad university of medical sciences, mashhad, iran pharmaceutical research center, avicenna institute, mashhad university of medical sciences, mashhad, iran omid rajabi department of pharmaceutics, school of pharmacy, mashhad university of medical sciences, mashhad, iran pharmaceutical research center, avicenna institute, mashhad university of medical sciences, mashhad, iran farshad farhadi department of pharmaceutics, school of pharmacy, mashhad university of medical sciences, mashhad, iran afshin jalali department of pharmaceutics, school of pharmacy, mashhad university of medical sciences, mashhad, iran

objective(s) physiological changes in the body may be utilized as potential triggers for controlled drug delivery. based on these mechanisms, stimulus-responsive drug delivery has been developed. materials and methods in this study, a kind of poly (n-isopropylacrylamide-acrylamide) membrane was prepared by radical copolymerization. changes in swelling ratios and diameters of the membrane were i...

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