نتایج جستجو برای: when the temperature falls below zero degrees centigrade

تعداد نتایج: 16187438  

2015
Sergey V. Ershkov

Mathematical model of thermo-balance of Earth’s heat fluxes is suggested for such an estimation. Using well-known data (albedo of the Earth’s surface, constant of the heat radiation from the Sun per square meter of Earth’s outer atmosphere surface, etc.), we could conclude that the process of heating only by the Solar activity is not sufficient to obtain the real meaning of the temperature of E...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیراز - دانشکده علوم 1390

any change in the refractive index of a laser active medium can lead to serious degradation of beam quality, laser beam modes, laser performance and variation in the intensity distribution. alteration in the refractive index of laser active medium is especially notable in high power lasers. it is clear that in the laser beam production, the pumping agent induces a great amount of heat which...

Journal: :Journal of neuroscience methods 2004
Beat Alessandri Bernd M Hoelper Robert Behr Oliver Kempski

Intracranial temperature measurement may play a pivotal role for prognosis and treatment of neurological and neurosurgical patients. For reliable clinical application, accurate temperature readings are therefore necessary. We present an independent in vitro study investigating the accuracy and stability of three temperature probes. Eight Neurovent-P Temp (RN), eight Licox temperature sensors (L...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه بیرجند 1389

there has been a gradual shift of focus from the study of rule systems, which have increasingly been regarded as impoverished, … to the study of systems of principles, which appear to occupy a much more central position in determining the character and variety of possible human languages. there is a set of absolute universals, notions and principles existing in ug which do not vary from one ...

Journal: :Stroke 1990
H Minamisawa P Mellergård M L Smith F Bengtsson S Theander F Boris-Möller B K Siesjö

Our objectives were to study the loss of heat from ischemic brain and to devise a method of maintaining brain temperature. Reversible forebrain ischemia was induced by carotid clamping and exsanguination in 30 anesthetized and artificially ventilated rats. Rectal, skull, and brain temperatures were measured, confirming previous findings that brain temperature falls by 4-5 degrees C during 15 mi...

Journal: :Journal of critical dietetics 2023

The prevalence of food allergies and intolerances among adults, also known as hypersensitivities (FHSs), are on the rise. There is a gap in health services for this population. Increasing competencies care providers (HCPs) can start with an understanding problem from perspective those who live FHSs. A purposive, asset-based sample four women, perceived themselves living well FHSs, were intervie...

2008
Robert D. Field Samuel S. P. Shen

[1] Drought and sea surface temperature were examined as the causes of severe biomass burning C emissions in Indonesia for 1997–2006, obtained from the Global Fire Emissions Database. Eighteen predictor variables were considered under log linear and piecewise regression models. The predictor variables considered were precipitation totals of up to 6 months, output from two soil moisture models, ...

Journal: :international journal of environmental research 0
c. tisseuil université de toulouse, umr cnrs-ups 5174, evolution et diversité biologique (edb), 118 route de narbonne, 31062 toulouse cedex 4, france gh.r. roshan department of geography, golestan university, gorgan, iran t. nasrabadi graduate faculty of environment, university of tehran, tehran, iran g.a. asadpour department of geology, faculty of science, university of hormozgan, bandar abbas, iran

the present research focuses on the changes of urmia lake level. for this purpose, two timescales have been considered. the trend changes of temperature, precipitation rate and quantitative values of climate type for the observational period from 1968 to 2011 (past scale) and from 2011 to 2100 (future scale) have been analyzed. general circulation model (gcm) is considered for simulating the va...

Journal: :Applied and environmental microbiology 1999
J A Wouters F M Rombouts W M de Vos O P Kuipers T Abee

Low-temperature adaptation and cryoprotection were studied in the thermophilic lactic acid bacterium Streptococcus thermophilus CNRZ302. S. thermophilus actively adapts to freezing during a pretreatment at 20 degrees C, resulting in an approximately 1, 000-fold increased survival after four freeze-thaw cycles compared to mid-exponential-phase cells grown at an optimal temperature of 42 degrees ...

2003
Edvard I. Moser

Behaviorally induced brain temperature changes have significant effects on field potentials recorded in the hippocampal formation. All components of the field potential are slowed during cooling. Field excitatory postsynaptic potentials (fEPSPs) are often reduced, while the population spike is increased in this state. To investigate whether such synaptic alterations affect hippocampus-dependent...

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