نتایج جستجو برای: دستگاههای gcو gcms

تعداد نتایج: 2946  

2015
C. H. Wu G. R. Huang H. J. Yu

Abstract. The occurrence of climate warming is unequivocal, and is expected to be experienced through increases in the magnitude and frequency of extreme events, including flooding. This paper presents an analysis of the implications of climate change on the future flood hazard in the Beijiang River basin in South China, using a variable infiltration capacity (VIC) model. Uncertainty is conside...

Journal: :UNESA Journal of Chemistry 2023

Suhu kolom Gas Chromatography-Mass Spectrometry (GCMS) merupakan salah satu variabel yang harus diperhatikan pada analisis senyawa kimia, agar terpisahkan dengan baik. Penelitian ini bertujuan untuk menentukan suhu terprogram optimum asam lemak menggunakan instrumen GCMS. Sampel digunakan berasal dari hasil ekstrak mikroalga Chlorella. Ekstrasi Chlorella dilakukan cara sonikasi selama 60 menit ...

2008
A. R. STINE N. Y. KRAKAUER

during the 1970s made possible the observation of the seasonally shifting patterns of global precipitation. It was not until recently, however, that the record could be considered long enough to investigate longer-term trends and the relationship between global precipitation and global warming. Using data from the Special Sensor Microwave Imager (SSM/I) instrument, Wentz et al. [2007] reported ...

2016
Jyoti Goutam R N Kharwar Vinod Kumar Tiwari Amrita Mishra Shweta Singh

Present work is directed toward the isolation and identification of biological active (antimicrobial) compound from metabolite extracted from endophytic fungus Emericella qaudrilineata(RS-5) (Accession number KC662361). Crude extracted from endophytic fungus Emericella qaudrilineata possessing antibacterial activity was subjected to bioassay guided fractionation in which toluene fraction exhibi...

2013
Farzin Shabani Lalit Kumar

Global climate model outputs involve uncertainties in prediction, which could be reduced by identifying agreements between the output results of different models, covering all assumptions included in each. Fusarium oxysporum f.sp. is an invasive pathogen that poses risk to date palm cultivation, among other crops. Therefore, in this study, the future distribution of invasive Fusarium oxysporum ...

2016
Justin T. Schoof Scott M. Robeson

Regional and local climate extremes, and their impacts, result from the multifaceted interplay between large-scale climate forcing, local environmental factors (physiography), and societal vulnerability. In this paper, we review historical and projected changes in temperature and precipitation extremes in the United States, with a focus on strengths and weaknesses of (1) commonly used definitio...

2008
Qiong Yang Qiang Fu John Austin Andrew Gettelman Feng Li Holger Vömel

[1] We quantify the vertical velocity and upward mass flux in the tropical lower stratosphere on the basis of accurate radiative heating rate calculations using 8-year Southern Hemisphere Additional Ozonesondes balloon-borne measurements of temperature and ozone and cryogenic frost-point hygrometer measured water vapor in the tropics (15 S—10 N). The impact of tropospheric clouds on the stratos...

2013
Nicola Scafetta

Global surface temperature records (e.g. HadCRUT4) since 1850 are characterized by climatic oscillations synchronous with specific solar, planetary and lunar harmonics superimposed on a background warming modulation. The latter is related to a long millennial solar oscillation and to changes in the chemical composition of the atmosphere (e.g. aerosol and greenhouse gases). However, current gene...

2013
Karthik Subbian Arindam Banerjee

There are several Global Climate Models (GCMs) reported by various countries to the Intergovernmental Panel on Climate Change (IPCC). Due to the varied nature of the GCM assumptions, the future projections of the GCMs show high variability which makes it difficult to come up with confident projections into the future. Climate scientists combine these multiple GCMs to minimize the variability an...

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