نتایج جستجو برای: yield loss threshold

تعداد نتایج: 743381  

A.R. Sepaskhah H. Parvizi

ABSTRACT- In recent years, intensive drought has caused a severe yield reduction in rain-fed trees. Increasing runoff of low amount rainfall can be used to provide partial water requirement of rain-fed trees. To achieve this objective, some strategies including gravel removal (G), rill construction across to slope (R) and applying of baking soda (S) and their effects on runoff, rainfall infiltr...

A Firoozi chahak , AA Alinaghi Langari , MH Beheshti,

Background: Taxi drivers have the most important role in the public transport services. They are exposed to various harmful agents and occupational hazards. Noise is a harmful occupational factors and hearing loss is its most important effect. Protection of drivers against hearing loss is essential. This study was performed to determine the prevalence of hearing loss among taxi and agency drive...

Journal: :پژوهش های تولید گیاهی 0
حسن مکاریان عضو هیئت علمی دانشکده کشاورزی دانشگاه شاهرود عباس روحانی عضو هیئت علمی دانشکده کشاورزی دانشگاه فردوسی مشهد

estimation of weed damage threshold is essensial in site-specific weed control programs. this experiment was conducted to determine the spatial distribution of weeds damage threshold in two wheat feilds. data related to weed biomass and crop yield were collected from sampling at 120 and 135 points of the first and second fields respectively based on a 4×4 m grid at research field of agricultura...

Journal: :iranian journal of basic medical sciences 0
akram pourbakht department of audiology, faculty of rehabilitation, rehabilitation research center, iran university of medical sciences, tehran, iran

objective(s): noise-induced hearing loss (nihl) is the major cause of acquired hearing loss.  celecoxib, a cyclooxygenase-2 (cox-2) inhibitor, is a non- steroidal anti- inflammatory drug (nsaid) with known antioxidant and antineoplastic activity. therefore, we monitored the extent of temporary noise- induced threshold shifts (tts) and cochlear damage caused by high level 4- khz noise exposure t...

2014
Fan Wu Zheng Hai Huang Xin Yan Guanghua Chen

Three basic auditory abilities were measured in 21 visually impaired college students and 21 sighted college students with same age and gender composition. The measurement consists of the hearing level of 11 tones, masking thresholds of same 11 tones masked by 80dB narrow band noises and frequency difference limens (FDL) of 3 tones. The results indicate that all the three auditory abilities of ...

ژورنال: طب کار 2017
برخورداری, ابوالفضل, جعفری, سید محمد, دهقانی, علی, زارع سخویدی, محمد جواد, کارگر شورکی, فاطمه,

Introduction: Noise-induced hearing loss (NIHL) is a major problem in industrialized and developing countries. Trend of industrialization and lack of proper protective equipment lead to an increased frequency of noise-related disorders especially NIHL. This study was conducted to investigate noise pollution and the frequency of NIHL in workers of one of the ceramic industries. Materials and ...

Journal: :international journal of occupational and environment medicine 0
sa moussavi-najarkola department of occupational health, school of medical sciences, tarbiat modares university, tehran a khavanin department. of occupational health, school of medical sciences, tarbiat modares university, tehran r mirzaei department of occupational health, health promotion research center, zahedan university of medical sciences, zahedan m salehnia department of anatomical sciences, school of medical sciences, tarbiat modares university, tehran a muhammadnejad cancer research center, iran cancer institute, tehran university of medical sciences, tehran m akbari department of audiology, school of rehabilitation, iran university of medical sciences, tehran

background: noise-induced hearing loss (nihl) is one of the most common occupational illnesses. most of the studies on nihl were conducted at high noise levels that people are rarely exposed to but in industries. the function of the outer hair cells (ohcs) is impaired after exposure to industrial noise. distortion product otoacoustic emissions (dpoaes) are useful in examination of noise-induced...

اصغری پور, محمدرضا, خمری, عیسی, سیروس مهر, علیرضا, عشقی زاده, حمیدرضا, پورابراهیمی, محیل,

This study was designed and implemented to investigate the yield and agronomic characteristics in three differently maturing corn (Zea mays L.) hybrids (SC704, SC500, and SC260) using four nitrogen (N) levels (0, 80, 160, and 240 kg N ha-1, from Urea, N= 45%). The experiments were conducted in Zabol (South-West of Iran) and Isfahan (Central Iran) in 2014 and 2015, respectively, using a split-pl...

Journal: :International Review of Economics & Finance 2004

بهنود, فتح االله, فراهانی, فرهاد, گودرزی, محمدتقی,

Introduction & Objective: Meningogenic hearing loss remains the most common cause of acquired postnatal childhood sensorineural hearing loss. Hearing loss occurs in 6-37% after meningitis. The object of this study was evaluation of frequency of post meningitic hearing loss in the patients who hospitalized in the hospitals of Hamadan during 1996-2006. Also we attended to conclude that routine ...

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