نتایج جستجو برای: air freezing index

تعداد نتایج: 610968  

Journal: Desert 2007
A. Khalili, H. Rahimi Z. Agha Shariatmadari

Depth of frost penetration is one of the main indices in agriculture, civil and transportation engineering. Soil temperature is a function of several factors including: topography, solar radiation, air temperature, moisture content and other physical properties of soil such as thermal capacity, coefficient of heat conductivity, and specific heat. The main objective of the present paper is to de...

Journal: :Korean journal for food science of animal resources 2014
Su Kyung Ku Ji Yun Jeong Jong Dae Park Ki Hong Jeon Eun Mi Kim Young Boong Kim

In this study, the physicochemical and sensory quality characteristics due to the influence of various thawing methods on electro-magnetic and air blast frozen pork were examined. The packaged pork samples, which were frozen by air blast freezing at -45℃ or electro-magnetic freezing at -55℃, were thawed using 4 different methods: refrigeration (4±1℃), room temperature (RT, 25℃), cold water (15℃...

ژورنال: علوم آب و خاک 2001
جعفر ناظم‌ السادات, سیدمحمد , سپاسخواه, علیرضا , محمدی, شهرام ,

In the Islamic Republic of Iran, the occurrence of chilling and freezing stresses have frequently caused great damages to crops and horticultural products. In southern Fars Province (south Iran) the cultivation of citrus orchards is popular and the economic losses due to injury from chilling and freezing stresses may exceed billions of Rials annually. The drop of ambient air temperature (above ...

Journal: :تحقیقات نظام سلامت 0
شهرام نظری کارشناس ارشد، گروه مهندسی بهداشت محیط، دانشکده بهداشت، دانشگاه علوم پزشکی قم، قم، ایران اسرافیل عسگری کارشناس ارشد، گروه مهندسی بهداشت محیط، دانشکده بهداشت، دانشگاه علوم پزشکی ارومیه، ارومیه، ایران رحیم عالی ده چناری استادیار، گروه مهندسی بهداشت محیط، دانشکده بهداشت، دانشگاه علوم پزشکی ارومیه، ارومیه، ایران

background: given the increasing importance of suspended particles and reporting weather conditions in the amount of ultraviolet radiation in many countries, in this study, the data of the maximum amounts of pollution by suspended particles with the size of 10, 2.5 and1 microns (pm10, pm2.5, pm1) which were reported in 1-hour time-series and global ultraviolet index (uvi) were used to predict t...

2013
Wenceslao Canet María Dolores Alvarez María Estrella Tortosa A. Ferreira

Results are presented of the effect of freezing followed by thawing (air and water immersion, both at environmental temperature) and cooking (traditional boiling in a covered pot) on quality profile (in terms of objective texture, colour, chlorophylls and pheophytins and sensory attributes) and structure of green beans (cv. Win). Freezing was carried out at three different rates by forced conve...

2005
NEMATODE PANAGROLAIMUS DAVIDI D. A. WHARTON I. M. BROWN

1. When free of surface water in air or liquid paraffin, the antarctic nematode Panagrolaimus davidi is freezing intolerant but avoids freezing by supercooling. 2. Survival of long-term exposure is enhanced by sub-zero temperatures compared with controls maintained at 99% relative humidity and 15 °C. 3. In water the nematodes are seeded by exogenous ice nucleation and a proportion are freezing ...

جعفر ناظم‌ السادات, سیدمحمد , سپاسخواه, علیرضا , محمدی, شهرام ,

In the Islamic Republic of Iran, the occurrence of chilling and freezing stresses have frequently caused great damages to crops and horticultural products. In southern Fars Province (south Iran) the cultivation of citrus orchards is popular and the economic losses due to injury from chilling and freezing stresses may exceed billions of Rials annually. The drop of ambient air temperature (above ...

2016
J. L. Pérez-Díaz M. A. Álvarez-Valenzuela F. Rodríguez-Celis

Freezing, melting, evaporation and condensation of water are essential ingredients for climate and eventually life on Earth. In the present work, we show how surface freezing of supercooled water in an open container is conditioned and triggered-exclusively-by humidity in air. Additionally, a change of phase is demonstrated to be triggered on the water surface forming surface ice crystals prior...

2007
Stephen D. Davis R. Brandon Pratt Frank W. Ewers Anna L. Jacobsen

A shift in chaparral species composition occurs from coastal to inland sites of the Santa Monica Mountains of southern California. Past studies have attributed this pattern to differential adaptations of chaparral species to gradients in moisture and solar radiation. We examined an alternate hypothesis, that shifts in species composition from coastal to inland sites is a result of differential ...

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