نتایج جستجو برای: carbon percentage

تعداد نتایج: 412496  

Journal: :British journal of anaesthesia 1991
A B Lumb A J Petros J F Nunn

Using respiratory inductive plethysmography, we have measured rib cage and abdominal motion during isoflurane anaesthesia in 16 healthy day-surgery patients. Anaesthesia was induced with propofol and maintained with 1 MAC isoflurane in air-oxygen via a laryngeal mask. Measurements were taken during both resting ventilation and hyperpnoea induced by rebreathing carbon dioxide. For resting ventil...

Ali. A. Hosseini,, F. Ghaharpour, H. Rajaei ,

Abstract: In this paper‚ the physical and mechanical properties of Al nanocomposite reinforced with CNTs wereinvestigated. High purity Al powder and Carbon Nanotubes (CNTs) with different percentage were mixed by ballmilling method and the composite was fabricated by cold pressing followed by sintering technique. The variation ofdensity and hardness of composite with CNTcontent was investigated...

Journal: :Yakugaku zasshi : Journal of the Pharmaceutical Society of Japan 2008
Mohamed Abdel Nabi El-Ries Gehad Genidy Mohamed Ali Kamal Attia

The electrochemical oxidation of repaglinide has been carried out in Britton-Robinson buffer at carbon paste and glassy carbon electrodes. Repaglinide exhibits a well-defined irreversible oxidation peak over the entire pH range (2-11). Differential pulse voltammetry was used to determine repaglinide in pure form. The peak current varied linearly in the following ranges: 8.0 x 10(-7)-3.2 x 10(-6...

2000
J. L. MICHALEK N. H. F. FRENCH E. S. KASISCHKE R. D. JOHNSON J. E. COLWELL

Fire disturbance in boreal forests can release carbon to the atmosphere stored in both the aboveground vegetation and the organic soil layer. Estimating pyrogenic emissions of carbon released during biomass burning in these forests is useful for understanding and estimating global carbon budgets. In this work, we have developed a method to estimate carbon eƒ ux for the burned black spruce in an...

Journal: :Rapid communications in mass spectrometry : RCM 2011
Elizabeth R Hurrell Philip A Barker Melanie J Leng Christopher H Vane Peter Wynn Chris P Kendrick Dirk Verschuren F Alayne Street-Perrott

Stable isotope analysis of sedimentary carbon in lakes can help reveal changes in terrestrial and aquatic carbon cycles. A method based on a single, photosynthetic organism, where host effects are minimised, should offer more precision than carbon isotope studies of bulk lake sediments. Here we report the development of a systematic method for use on fossil lacustrine diatom frustules, adapted ...

Journal: :Journal of agricultural and food chemistry 2002
J Renée Brooks Nina Buchmann Sue Phillips Bruce Ehleringer R David Evans Mike Lott Luiz A Martinelli William T Pockman Darren Sandquist Jed P Sparks Lynda Sperry Dave Williams James R Ehleringer

The carbon isotope ratios (delta(13)C) of 160 beers from around the world ranged from -27.3 to -14.9 per thousand, primarily due to variation in the percentage of C(3) or C(4) plant carbon in the final product. Thirty-one percent of beers had a carbon signature of C(3) plants (barley, rice, etc.), whereas the remaining 69% contained some C(3)-C(4) mixture (mean of mixtures, 39 +/- 11% C(4) carb...

Water is prime requirement for surviving of any living beings.  The existence of surface water and groundwater sources are used for domestic, agriculture and industrial purposes in all over the world. Fresh water from both the water sources is highly contaminated in recent years because of rapid population growth, modern agriculture and industrial growth. Among them, contamination of water sour...

A. Gholamalizadeh Ahangar A. Shirmohammadi H. Allahyari T. Hadad

ABSTRACT - Vermicomposting with pomegranate pulp can not only prevent pollution of the environment but can also create jobs, generate added value and prevent the waste of energy and the country's capital. This factorial experiment was conducted in a completely randomized design. The first factor (a) in two levels contained neutralized pomegranate pulp with lime and non-neutralized pulp. The sec...

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