نتایج جستجو برای: stress variations

تعداد نتایج: 619594  

Journal: :Cement and Concrete Research 2021

Abstract The idea behind the present work is to assess robustness of fresh cement-based materials (i.e. their ability display same properties when submitted variations in way they are produced) from a generic and analytical point view. First, models literature relating components proportions yield stress combined into multi-scale physical approach compared our experimental measurements. In seco...

Journal: :The Journal of neuroscience : the official journal of the Society for Neuroscience 2005
T Y Zhang P Chrétien M J Meaney A Gratton

In rats, naturally occurring variations in maternal care contribute to the development of individual differences in the behavioral and neuroendocrine responses to stress during adulthood. The dopamine (DA) projection to the medial prefrontal cortex (mPFC) plays an important role in mediating stress responsivity and is thought to be involved also in regulating sensorimotor gating. In the present...

2013
Devy Widjaja Michele Orini Elke Vlemincx Sabine Van Huffel

Mental stress is a growing problem in our society. In order to deal with this, it is important to understand the underlying stress mechanisms. In this study, we aim to determine how the cardiorespiratory interactions are affected by mental arithmetic stress and attention. We conduct cross time-frequency (TF) analyses to assess the cardiorespiratory coupling. In addition, we introduce partial TF...

Journal: :international journal of advanced biological and biomedical research 2013
kobra saghafi jafar ahmadi ahmad asgharzadeh shiva bakhtiari

salinity is one of the most important abiotic stresses that limit crop growth and productivity. this study focuses on the effects of different strains of plant growth promoting rhizobacteria (pgpr) on the physiological responses of two wheat cultivars under normal and salt stress conditions. the wheat cultivars selected include one which is tolerant to salinity (kavir) and one which is sensitiv...

Journal: :علوم گیاهان زراعی ایران 0
نفیسه مهدی نژاد دانشجوی دکتری، پردیس کشاورزی و منابع طبیعی دانشگاه تهران، کرج منصور امیدی استاد، پردیس کشاورزی و منابع طبیعی دانشگاه تهران، کرج محمدرضا جلال کمالی محقق ارشد، مرکز بین المللی تحقیقات ذرت و گندم (cimmyt)، کرج محمدرضا نقوی استاد، پردیس کشاورزی و منابع طبیعی دانشگاه تهران، کرج براتعلی فاخری دانشیار، دانشکدۀ کشاورزی، دانشگاه زابل

to study and determine  effect of salinity on relationship between  agronomic  characteristics and grain yield, 167  of  the  seri/babax recombinant wheat inbred  lines (ril) together with two parents were evaluated using alpha latice design with two replications under two conditions (salt stress and normal), in zabol field station in 2011-12 cropping season. fourteen  traits  including: some a...

2017
Melisa I Barliana Shintya N Amalya Ivan S Pradipta Sofa D Alfian Arif SW Kusuma Tiana Milanda Rizky Abdulah

Daily life stress markedly affects the response toward stressful stimuli. DNA methy-lation is one of the factors that regulate this response, and is a normal mechanism of somatic cell growth, but its regulatory gene variations may cause alterations in the stress response. The aim of the present study was to investigate genotypic variants of the DNA methyltransferase 3A (DNMT3A) gene in 129 heal...

2006
Peter M. Shearer Germán A. Prieto Egill Hauksson

[1] We compute and analyze P wave spectra from earthquakes in southern California between 1989 and 2001 using a method that isolates source-, receiver-, and pathdependent terms. We correct observed source spectra for attenuation using both fixed and spatially varying empirical Green’s function methods. Estimated Brune-type stress drops for over 60,000ML = 1.5 to 3.1 earthquakes range from 0.2 t...

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