نتایج جستجو برای: ppp model

تعداد نتایج: 2107193  

اثر تاخیر تروپوسفر بعنوان یکی از منابع خطا در کار با سامانه های تعیین‌موقعیت ماهواره‌ای است. این خطا که منشا فیزیکی دارد و ماهیت آن مانع از حذف کامل آن با استفاده از مدل‌ها می‌شود، یکی از موثرترین خطاها در سامانه‌های ماهواره‌ای است که چشم‌پوشی از آن و یا برآورد نشدن صحیح آن تاثیر بسیار زیادی در دقت تعیین موقعیت دارد. از آنجا که در هیدروگرافی بیشترین استفاده از سامانه‌های GNSS در حالت کینماتیک...

2015
Xiongjian Rao Xiaotao Duan Weimin Mao Xuexia Li Zhonghua Li Qian Li Zhiguo Zheng Haimiao Xu Min Chen Peng G. Wang Yingjie Wang Binghui Shen Wen Yi

The pentose phosphate pathway (PPP) plays a critical role in macromolecule biosynthesis and maintaining cellular redox homoeostasis in rapidly proliferating cells. Upregulation of the PPP has been shown in several types of cancer. However, how the PPP is regulated to confer a selective growth advantage on cancer cells is not well understood. Here we show that glucose-6-phosphate dehydrogenase (...

2013
M. Kamrul Hassan Ruhul Salim

Relative population growth affects relative prices through the so-called BalassaSamuelson (BS) mechanism and that in turn impacts PPP. This paper empirically investigates the relationship between PPP exchange rate and relative population growth in a panel of 80 selected countries. Following the Balassa-Samuelson hypothesis this paper argues that relative population growth affects nominal wages ...

Journal: :AJNR. American journal of neuroradiology 1999
R Willinsky M Goyal K terBrugge W Montanera

BACKGROUND AND PURPOSE Tortuous, engorged veins can be identified on the venous phase of the brain circulation in patients with venous congestion related to an intracranial dural arteriovenous fistula (DAVF). The term pseudophlebitic pattern (PPP) has been used to describe this finding. The purpose of this study was to determine the prevalence of PPP in patients with intracranial DAVF and to an...

Journal: :European journal of cardio-thoracic surgery : official journal of the European Association for Cardio-thoracic Surgery 2011
Francesco Santini Francesco Onorati Mariassunta Telesca Fabio Patelli Giorgio Berton Gianluigi Franchi Giuseppe Faggian Alessandro Mazzucco

OBJECTIVE Acute lung injury still accounts for postoperative mortality after cardiopulmonary bypass (CPB). The safety and the efficacy of pulsatile pulmonary perfusion (PPP) during CPB were analyzed. Preliminary results of the first PPP trial in human beings are reported. METHODS Thirty low-risk coronary artery bypass grafting (CABG) patients were prospectively randomized to receive PPP with ...

Journal: :Journal of neurochemistry 1995
O Ben-Yoseph D M Camp T E Robinson B D Ross

Cerebral pentose phosphate pathway (PPP) activity has been linked to NADPH-dependent anabolic pathways, turnover of neurotransmitters, and protection from oxidative stress. Research on this potentially important pathway has been hampered, however, because measurement of regional cerebral PPP activity in vivo has not been possible. Our efforts to address this need focused on the use of a novel i...

Journal: :Dermatology online journal 2017
Dagmar Wilsmann-Theis Arnd Jacobi Yvonne Frambach Sandra Philipp Ansgar Weyergraf Tillmann Schill Kirsten Steinz Sascha Gerdes Rotraut Mössner

BACKGROUND Palmoplantar pustulosis (PPP) is a recalcitrant chronic inflammatory skin disease. Data relevant for the medical care of patients with PPP are scarce. Thus, the aim of this work was to investigate the disease burden, clinical characteristics, and comorbidity of PPP patients in Germany. PATIENTS AND METHODS PPP patients were examined in a crosssectional study at seven specialized ps...

Journal: :Japanese journal of medicine 1991
M Miura Y Nomoto H Sakai

Diffuse proliferative glomerulonephritis without IgA deposits (DPGN) in patients with pustulosis palmaris et plantaris (PPP) is described. This association has not been previously reported. Although PPP was resolved transiently after tonsillectomy, it was worsened coincidently at the time of exacerbation of DPGN. Improvement of proteinuria and PPP was observed after antiplatelet therapy. It was...

Journal: :Molecules 2015
Juanjuan Yi Zhenyu Wang Haina Bai Xiaojin Yu Jing Jing Lili Zuo

In this study, an efficient purification method for the polyphenols of Pinus koraiensis pinecone (PPP) has been developed. AB-8 resin was verified to offer good adsorption and desorption ratio for PPP. Response surface methodology (RSM) indicated that the optimized purification parameters for PPP were 1.70 mg GAE/mL phenolic sample concentration, 22.00 mL sample volume, and 63.00% ethanol conce...

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