نتایج جستجو برای: carbon dioxide

تعداد نتایج: 313398  

Journal: :محیط زیست طبیعی 0
زینب رفیعی کارشناس ارشد، دانشکده مهندسی منابع طبیعی، دانشگاه صنعتی اصفهان نورالله میرغفاری دانشیار دانشکده مهندسی منابع طبیعی، دانشگاه صنعتی اصفهان سید حمید متین خواه استادیار دانشکده مهندسی منابع طبیعی، دانشگاه صنعتی اصفهان

increasing energy demands associated with economic growth and industrialization have resulted in dramatic increases in air pollution emissions. air pollution damages the plant mainly by disrupting cell homeostatic conditions.in the present study, diverse plant criteria indicating air pollution from different levels including cell biochemistry, leaf and tree crown in the plane-tree were determin...

Journal: :Analytical sciences : the international journal of the Japan Society for Analytical Chemistry 2011
Akira Ohashi Masahiro Sugaya Haeng-Boo Kim

A measuring method for the distribution behavior between supercritical carbon dioxide and water by a microchip was developed. A surface modification of the microchannel by dichlorodimethylsilane induced a spontaneous phase separation of the supercritical carbon dioxide and aqueous phases in the microchip. The maximum contact time of the aqueous phase to the supercritical carbon dioxide phase wa...

Journal: :Nature communications 2014
Dohyung Kim Joaquin Resasco Yi Yu Abdullah Mohamed Asiri Peidong Yang

Highly efficient and selective electrochemical reduction of carbon dioxide represents one of the biggest scientific challenges in artificial photosynthesis, where carbon dioxide and water are converted into chemical fuels from solar energy. However, our fundamental understanding of the reaction is still limited and we do not have the capability to design an outstanding catalyst with great activ...

Journal: :world journal of plastic surgery 0
ramtin kassir department of plastic surgery, hoag presbytarian university hospital, newport beach, ca, usa. johonna gilbreath department of plastic surgery, hoag presbytarian university hospital, newport beach, ca, usa. ali sajjadian 496 old newport blvd, suite #3, newport beach, ca 92663, usa.

rhinophyma is a severe late complication of rosacea, which is characterized by progressive hyperplasia of sebaceous glands and connective tissue involving the lower two-thirds of the nose. it can be an emotionally devastating disorder, and serve as a medium for occult cancers and other health problems. many surgical treatments have been advocated, as well as dermabrasion and laser therapy. in l...

Journal: :علوم گیاهان زراعی ایران 0
حسین اورکی دانشجوی دکتری، گروه زراعت، دانشکدة کشاورزی، دانشگاه تربیت مدرس سید علی مدرس ثانوی استاد، گروه زراعت، دانشکدة کشاورزی، دانشگاه تربیت مدرس اسکندر زند استاد، مؤسسة تحقیقات گیاه پزشکی کشور علی مختصی بیدگلی استادیار، گروه زراعت دانشکده کشاورزی دانشگاه تربیت مدرس

to study the effects of carbon dioxide enrichment on morphological, nutrient absorption and yield of wheat (triticum aestivum l. cv. pishtaz) under weed competitive pressure of wild oat (avena ludovicianal.), an experiment was conducted as a split plot based on a randomized completely block design during the 2013-2014 growing season at the research field of tarbiat modares university, iran. car...

Journal: :The Journal of clinical investigation 1960
F MANFREDI H O SIEKER

At present there is experimental and clinical evidence to support the view that alteration in alveolar oxygen tension has a direct effect on pulmonary circulation. Animal experimentation (1-4) and hemodynamic studies in human subjects (5-8) indicate that pulmonary vascular resistance increases and blood flow is thereby reduced in hypoxic areas of the lung. This is apparently a mechanism by whic...

2016
Khalid Ahmed Muhammad Shahbaz

This paper applies Pedroni's panel cointegration approach to explore the causal relationship between trade openness, carbon dioxide emissions, energy consumption and economic growth for the panel of newly industrialized economies (i.e. Brazil, India, China and South Africa) over 1 Corresponding author the period of 1970–2013. Our panel cointegration estimation results found majority of the vari...

2013

1.1 Carbon dioxide sequestration in sub-seabed geological formations is a process consisting of separation of carbon dioxide from industrial and energy-related sources, transport to an offshore geological formation, and long-term isolation from the atmosphere. This process is one option in a portfolio of mitigation actions for stabilization of atmospheric greenhouse gas concentrations with the ...

Journal: :British journal of anaesthesia 1956
W E LAWES

RECENTLY a great deal of attention has been focused on the problem of carbon dioxide accumulation during anaesthesia (Stead et ah, 1953; Harbord, and Lucas, 1953). A number of articles have appeared describing investigations on the actual figures for " alveolar air " or arterial carbon dioxide tensions found during anaesthesia. Ringrose et al. (1950) developed a carbon dioxide indicator showing...

Journal: :Science 2005
James Heath Edward Ayres Malcolm Possell Richard D Bardgett Helaina I J Black Helen Grant Phil Ineson Gerhard Kerstiens

Forests have a key role as carbon sinks, which could potentially mitigate the continuing increase in atmospheric carbon dioxide concentration and associated climate change. We show that carbon dioxide enrichment, although causing short-term growth stimulation in a range of European tree species, also leads to an increase in soil microbial respiration and a marked decline in sequestration of roo...

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