نتایج جستجو برای: respiration depth

تعداد نتایج: 199671  

2017
Tongxin Hu Long Sun Haiqing Hu Futao Guo

In boreal forests, fire is an important part of the ecosystem that greatly influences soil respiration, which in turn affects the carbon balance. Wildfire can have a significant effect on soil respiration and it depends on the fire severity and environmental factors (soil temperature and snow water equivalent) after fire disturbance. In this study, we quantified post-fire soil respiration durin...

Journal: :NeuroImage 2006
Rasmus M Birn Jason B Diamond Monica A Smith Peter A Bandettini

Subtle changes in a subject's breathing rate or depth, which occur naturally during rest at low frequencies (<0.1 Hz), have been shown to be significantly correlated with fMRI signal changes throughout gray matter and near large vessels. The goal of this study was to investigate the impact of these low-frequency respiration variations on both task activation fMRI studies and resting-state funct...

2003
Laura E. Scott-Denton Kimberlee L. Sparks Russell K. Monson

We examined soil respiration to determine what measurable environmental variables can be used to predict variation in soil respiration rates, spatially and temporally, at a high-elevation, mixed conifer, subalpine forest site at the Niwot Ridge Ameriflux Site in Colorado. For three summers, soil respiration rates were measured using soil collars and a portable gas-exchange system. Transects of ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه گیلان 1387

چکیده ندارد.

Journal: :British journal of anaesthesia 1972
P Suppan

Automatic anaesthesia using electroencephalographic assessment of depth was described by American authors in 1951 and 1954. A first paper (Soltero, Faulconer and Bickford, 1951) dealt with ether vaporization in a closed circuit with spontaneous respiration. A second communication (Kiersey, Faulconer and Bickford, 1954) was concerned with thiopentone anaesthesia during spontaneous respiration an...

Journal: :Indian journal of physiology and pharmacology 1972
K Seetha Devi L R Reddy

Stimulation of sciatic nerve produced a rise in arterial blood pressure followed by a fall with an increase in the rate and depth of respiration in dogs under pentobarbitone anaesthesia. Application of cotton swabs soaked with GABA in 0.9 % saline to the spinal cord at Ll and L. segments did not change the basal arterial pressure and respiratory rate, but elicited only the pressor effect of sci...

2015
Li-Chao Fan Ming-Zhen Yang Wen-Yan Han

Land-use change has a crucial influence on soil respiration, which further affects soil nutrient availability and carbon stock. We monitored soil respiration rates under different land-use types (tea gardens with three production levels, adjacent woodland, and a vegetable field) in Eastern China at weekly intervals over a year using the dynamic closed chamber method. The relationship between so...

2015
Lei Yu Yujie Wang Yunqi Wang Suqi Sun Liziyuan Liu

Separating the components of soil respiration and understanding the roles of abiotic factors at a temporal scale among different forest types are critical issues in forest ecosystem carbon cycling. This study quantified the proportions of autotrophic (RA) and heterotrophic (RH) in total soil (RT) respiration using trenching and litter removal. Field studies were conducted in two typical subtrop...

2014
Sylvia Andrzejewski Simon-Pierre Gravel Julie St-Pierre Michael N Pollak

Metformin is commonly used in the treatment of diabetes, however recently there is increasing interest in “repurposing” the drug for cancer prevention or treatment. Metformin is believed to act by inhibiting mitochondrial complex I, leading to activation of AMPK. Interestingly, metformin treatment is not associated with the serious health consequences that are seen with classic inhibitors of co...

Journal: :نشریه بازیافت آب 0
سید محمدعلی مسعودی مشهد، دانشگاه فردوسی، دانشکدة مهندسی جواد سرگلزایی مشهد، دانشگاه فردوسی، دانشکدة مهندسی ابوالفضل درودی مشهد، دانشگاه فنی وحرفه ای، دانشکدة ثامن الحجج

due to the population growth and human activities in the agricultural and industrial fields, healthy and sanitary water has become scarce. due to its high contamination load, environmental harms and water discharge standards, starch producing industry is regarded as one of the industries polluting water sources which its treatment and recovery remains important. in the present study, after fabr...

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