نتایج جستجو برای: سورفکتانت sds

تعداد نتایج: 21615  

ژورنال: پژوهش نفت 2015

حفاری مخازن کم فشار، با مشکلات فنی و اقتصادی زیادی همراه است، به‌گونه‌ای که توسعه این میادین را غیراقتصادی می‌نماید. یکی از عمده مشکلات حفاری این چاه‌ها، هرزروی‌های کنترل ناپذیر در شکاف‌ها می‌باشد. امروزه در تکنولوژی‌های نوین حفاری از میکروحباب‌های پایدار با قطر بین 10 تا µm 100 به‌همراه پلیمر جهت رفع این مشکل استفاده می‌گردد. خصوصیات منحصر به فرد سیال پایه آبی شامل میکروحباب، یک اتصال درونی ال...

ژورنال: شیمی کاربردی 2017

     بیشتر ذخایر نفتی جهان در مخازن کربناته شکافدار می باشند که به دلیل حالت ترشوندگی و تراکم شبکه ماتریسی سنگ بازده برداشت نفت پایینی دارند اگر حالت ترشوندگی سنگ کربناته از حات نفت دوست به آب دوست تغییر یابد. بازده برداشت نفت  به دلیل آشام آّب به داخل سنگ اشباع شده از نفت به مقدار قابل ملاحظه ای افزایش می یابد. آب هوشمند می تواند ترشوندگی سنگ کربناته را از حالت نفت دوست به حالت خنثی-آب دوست تغی...

Journal: :Journal of the American Society for Mass Spectrometry 1999
E K Fridriksson B Baird F W McLafferty

Electrospray ionization/tandem mass spectrometry of proteins separated on sodium dodecylsulfate polyacrylamide gel electrophoresis (SDS-PAGE) gels is severely limited by the requirement that the protein be completely separated from the SDS. As shown here, the gaseous noncovalent SDS adducts of protonated proteins thus formed can be dissociated by infrared irradiation. ESI spectra from myoglobin...

1999
Uwe Roth Ernst Georg Haffner Thomas Engel Christoph Meinel

This paper introduces a new kind of Java-server, the Smart Data Server (SDS). It offers the accessing of data with function-calls to SDS-networks. This allows the building of lean clients with the shifting of functionality to the SDS-network. The server builds the middle-tier in a multi-tier architecture (Client SDS-Network Database). It offers a frame for easy-to-build environment-independent ...

2013
Wei Wang Shuixian Shen Xiaoping Luo Chunxiu Gong Xuefan Gu Yun Li Minlian Minlian Minlian Jin Bin Wu

Methods This phase IV open-label interventional study was performed on samples from 205 GHD children (175 subjects born AGA and 30 subjects SGA) of Chinese Han origin, recruited at 8 centers. All the subjects were given r-hGH for 4 weeks (0.033mg/kg/d).1536 SNPs were selected from 100 Candidate Genes involved in the GHIGFI axes, growth plate and other short stature-related diseases. We genotype...

Journal: :Applied and environmental microbiology 2007
Margrete Solheim Agot Aakra Heidi Vebø Lars Snipen Ingolf F Nes

Resistance to bile is a prerequisite property of the gastrointestinal bacterial flora. Bile acids are powerful detergents, and resistance to sodium dodecyl sulfate (SDS) has therefore often been considered relevant to studies of bile resistance. We have studied the effects of bovine bile (BB) and SDS on Enterococcus faecalis V583 by traditional growth studies and microarrays. Transcriptional re...

2017
Haoxuan Luo Yan Chen Baoguo Sun Ting Xiang Shijun Zhang

BACKGROUND Spleen-deficiency syndrome (SDS) in Traditional Chinese Medicine (TCM) played pivotal roles on the development of hepatocellular carcinoma (HCC). This study was performed to establish and evaluate HCC model in mice with SDS in TCM. MATERIAL AND METHODS A total of 90 C57BL/6 mice were randomized in six groups (n=15 for each group): A, Control group; B, SDS group; C, orthotopic HCC (...

Journal: :The journal of medical investigation : JMI 1999
Y Kaneda

OBJECTIVE This study was performed to provide psychometric data concerning the Zung Self-Rating Depression Scale (SDS) when administered to schizophrenics. METHODS The subjects were 110 schizophrenic inpatients (50 females and 60 males) who were diagnosed according to the DSM-IV criteria for schizophrenia. Informed consent was obtained from all subjects. RESULTS 1) Cronbach's alpha for the ...

Journal: :Gadjah Mada Journal of Psychology 2023

Self-Determination Scale (SDS) telah digunakan untuk mengukur determinasi diri, kesadaran terhadap diri sendiri, dan kesempatan menentukan pilihan tetapi belum terdapat penelitian yang menguji properti psikometri dari SDS. Penelitian ini bertujuan mengevaluasi validitas struktur internal SDS versi Indonesia. melibatkan 703 remaja berusia 12-21 tahun sedang menempuh pendidikan di Kota Surabaya. ...

Journal: :Work, organisation, labour & globalisation 2023

Self-reliant digital systems (SDS) can adapt to changing circumstances and environments, evaluate complex situations, make decisions optimise processes. In this context, work processes also change, since SDS are controlled by workers but partly out of control, that is, processing information independently without worker influence. It be expected handling interacting with impact workers’ percept...

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