نتایج جستجو برای: gc and gcms

تعداد نتایج: 16832498  

ژورنال: :علوم و تکنولوژی محیط زیست 0
مژگان امتیازجو استادیار دانشگاه آزاد اسلامی واحد تهران شمال- دانشکده علوم و فنون دریایی *(مسئول مکاتبات) سیما صدیقی کارشناس ارشد آلودگی و حفاظت محیط زیست دریا دانشگاه آزاد اسلامی واحد تهران شمال مرجان امتیازجو دکتری بیوتکنولوژ‍ی دانشگاه usm مالزی

حوزه نفتی سیری واقع در خلیج فارس یکی از مناطق چهارگانه عملیات استخراج ، پالایش و انتقال نفت است .این حوزه به لحاظ انجام عملیات یاد شده در معرض بار آلودگی نفتی و هیدروکربن های آروماتیک چند حلقه ایpahs    می باشد. در این تحقیق میزان pahs   توسط gcms  در 8 ایستگاه انتخابی واقع در دو ترانسکت اندازه گیری شد.  با توجه به وجود آنتراسن در بیشتر ایستگاه های تحقیقاتی میکروارگانیسم های تجزیه کننده آنتراسن...

2013
KAREN M. SHELL

Climate sensitivity is generally studied using two types of models. Atmosphere–ocean general circulation models (AOGCMs) include interactive ocean dynamics and detailed heat uptake. Atmospheric GCMs (AGCMs) with slab ocean models (SOMs) cannot fully simulate the ocean’s response to and influence on climate. However, AGCMs are computationally cheaper and thus are often used to quantify and under...

Maryam Akhgari Mohammad javad Khodayar Seyed Majid Salimiasl, Zahra Mousavi,

Background:Extraction of drugs is one of the biggest concerns and the most important part of preparation and determination in forensic medicine. The lack of an easy, efficient and fast extraction method is the most important and most difficult problem despite the development of forensic centers and their being equipped with new diagnostic devices. In the present study, a comparison was conducte...

Journal: :International Journal of Disclosure and Governance 2023

Abstract This paper feeds the literature about investors’ reaction to release of going concern modified audit reports, which is abundant and controversial among scholars. Moving a step beyond solely detection abnormal stock returns at around event date, as done in only two previous studies on Italian setting, we perform an OLS multiple regression test informativeness CARs influence variables se...

The purpose of this study is the detection of lateral and vertical gradients of relative concentrations of compounds presented in oil. In addition, the detection allows us to assess potential drainage zones in a reservoir during the reservoir production by steam injection. In this paper, a new method for monitoring of steam chamber development in a 2D model was created and tested. The methodol...

2005
David A. Schwartz

Background: In most states, mental illness costs are an increasing share of Medicaid expenditures. Specialized depression care managers (CM) have consistently demonstrated improvements in patient outcomes relative to usual primary care (UC), but are costly and may not be fully utilized in smaller practices. A generalist care manager (GCM) could manage multiple chronic conditions and be more acc...

Journal: :Journal of Applied and Natural Science 2022

Alternaria porri causing purple blotch disease of onion is a destructive phytopathogen which causes severe loss in productivity. The present study aimed to unravel the antagonistic potential and efficacy volatile organic compounds produced by various Trichoderma spp. against A. through Gas chromatography-mass spectrometry (GCMS) analysis. Ten isolates species were isolated from rhizospheric soi...

Journal: :Journal of clinical microbiology 2015
Timothy J J Inglis Dorothee R Hahne Adam J Merritt Michael W Clarke

Solid-phase microextraction gas chromatography-mass spectrometry (SPME-GCMS) was used to show that dimethyl sulfide produced by Burkholderia pseudomallei is responsible for its unusual truffle-like smell and distinguishes the species from Burkholderia thailandensis. SPME-GCMS can be safely used to detect dimethyl sulfide produced by agar-grown B. pseudomallei.

2006
Michael Fox-Rabinovitz Jean Côté Bernard Dugas Michel Déqué John L. McGregor

[1] Variable resolution general circulation models (GCMs) using a global stretched grid with enhanced uniform resolution over the region(s) of interest have proven to be an established approach to regional climate modeling providing an efficient regional downscaling to mesoscales. This approach has been used since the early to mid-1990s by climate modeling groups from France, the United States,...

2010
NARESH DEVINENI A. SANKARASUBRAMANIAN

Recent research into seasonal climate prediction has focused on combining multiple atmospheric general circulation models (GCMs) to develop multimodel ensembles. A new approach to combining multiple GCMs is proposed by analyzing the skill levels of candidate models contingent on the relevant predictor(s) state. To demonstrate this approach, historical simulations of winter (December–February, D...

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