نتایج جستجو برای: freezing

تعداد نتایج: 17778  

Journal: :آب و خاک 0
میان آبادی میان آبادی موسوی بایگی موسوی بایگی ثنایی نژاد ثنایی نژاد نظامی نظامی

abstract plants growth and development and physiological activities occur in a certain air temperature range. spit of this fact that zero temperature named as a freezing temperature, in agriculture meteorology, freezing happen in lower temperature which is different for plants that lead to their tissues damage. early autumn freezing cause damage to harvesting of cotton and sugar beet and affect...

Baninasab, Bahram, Gholami, Mahdiyeh, Mobli, Mostafa, Saadati, Safoora,

Abstract: Temperature is one of the most important factors limiting the production and distribution of olive. Different olive cultivars show diverse responses to low temperature and so, the selection of cold tolerant cultivars is the most effective method to avoid frost damages. The main purpose of this study was to compare freezing tolerance of seven olive cultivars and to investigate the rel...

D. Shuai H. Ye L. Hong-yu, W. Dong-mei

Different kinds of freezing-point regulators were evaluated to expand the freezing point zone of large yellow croaker, and several treatment methods such as ordinary atmospheric pressure, vacuum environment and injection during the process of penetration were compared to reveal the relationship of diffusion velocities, diffusion time and freezing point of the large yellow croaker. Results obtai...

Dong-mei , W., Hong-yu , L., Shuai , D., Ye, H.,

Different kinds of freezing-point regulators were evaluated to expand the freezing point zone of large yellow croaker, and several treatment methods such as ordinary atmospheric pressure, vacuum environment and injection during the process of penetration were compared to reveal the relationship of diffusion velocities, diffusion time and freezing point of the large yellow croaker. Results obtai...

Background and Objectives: Freezing under statically electric fields is one of the novel freezing methods to improve the quality of frozen products by controlling the nucleation process. The objective of this study was to investigate effects of freezing under electrostatic fields on the freezing parameters and microstructures of frozen button mushrooms. Materials and Methods: Mushroom samples w...

Masumeh Foroutan, Seyed Mahmood Fatemi

 We performed molecular dynamics simulations using the coarse-grained model to study the freezing behavior of pure water and 14% water-salt mixture in a wide range of temperatures for a very long time around 50 nanoseconds. For the salty water, an interface in nanoscale was used. For both systems, the f...

Western and North-Western regions of Iran feature very cold winters, a lot of snow, and freezing temperatures during most nights in December, January, February, and March. This directly influences the selection and applications of dimension stones in these areas. Freezing influences both mechanical and physical properties of rocks. Therefore, measuring the changes in values of these parameters ...

Journal: :The Journal of biological chemistry 2008
Weiqi Li Ruiping Wang Maoyin Li Lixia Li Chuanming Wang Ruth Welti Xuemin Wang

Changes in membrane lipid composition play important roles in plant adaptation to and survival after freezing. Plant response to cold and freezing involves three distinct phases: cold acclimation, freezing, and post-freezing recovery. Considerable progress has been made toward understanding lipid changes during cold acclimation and freezing, but little is known about lipid alteration during pos...

ژورنال: سلامت و محیط زیست 2011
علی محمدی, محمود, محوی, امیرحسین, مهدوی, مختار, ناصری, سیمین, یونسیان, مسعود,

Background and Objectives: Nowadays, most countries of the world have shortage of water due to many reasons such as population growth, rising of living standards, indiscriminate water use, and so on. Besides, in absence of adequate water resources, desalination of brackish and saline waters have been used to supply potable water. Freezing process is one of the methods which can be used to desal...

Journal: :محیط شناسی 0
مختار مهدوی دانشکدة بهداشت دانشگاه علوم پزشکی تهران، فوق لیسانس مهندسی بهداشت محیط سیمین ناصری دانشکدة بهداشت دانشگاه علوم پزشکی تهران، استاد گروه مهندسی بهداشت محیط امیرحسین محوی دانشکده بهداشت دانشگاه علوم پزشکی تهران، استادیار گروه مهندسی بهداشت محیط مسعود یونسیان دانشکدة بهداشت دانشگاه علوم پزشکی تهران، استاد گروه مهندسی بهداشت محیط محمود علیمحمدی دانشکدة بهداشت دانشگاه علوم پزشکی تهران، استادیار گروه مهندسی بهداشت محیط

today many countries have water shortage problems, so most of them compel to resort to desalination processes. this paper describes the effect of indirect contact freezing by external cooling for desalination of seawater and brackish water. although various types of processes are introduced for desalination and such processes as reverse osmosis (ro) and multi-effect distillation (med) are used ...

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