نتایج جستجو برای: benzoquinone bq
تعداد نتایج: 6906 فیلتر نتایج به سال:
We have successfully demonstrated that a microflow reactor is extremely useful in controlling reactions involving an unstable o-benzoquinone. The key features of the method are an effective o-benzoquinone generation and its rapid use for the following reaction without decomposition in a microflow system.
Many clinically useful antitumor agents have a quinone group in their structure. A series of model compounds has been studied to determine if the quinone group is involved in the cytotoxic activity of these agents and to investigate the mechanism of this action. Hydrolyzed benzoquinone mustard, which contains a quinone group, produced significant cell kill of L5178Y lymphoblasts, whereas hydrol...
OBJECTIVES To compare caesium-137 concentrations in patients from the Western Isles Health Board, Glasgow area, and other parts of the Scottish mainland, and to investigate the source of 137Cs in patients from the Western Isles. DESIGN Study of hypertensive patients having electrolyte concentrations measured, including 137Cs. Interview by questionnaire of island subjects about intake of foods...
OBJECTIVE To evaluate the association between the International Prostate Symptom Score (IPSS) bother question (BQ) and a validated disease-specific quality-of-life questionnaire, the Benign Prostatic Hyperplasia (BPH) Impact Index (BPH-II), using the BPH Registry and Patient Survey database. PATIENTS AND METHODS The BPH Registry and Patient Survey is a multicentre, longitudinal, observational...
Increased endothelin-1-mediated vasoconstrictor tone has been linked to the etiology of a number of pathologies associated with human aging, including hypertension, congestive heart failure, and coronary artery disease. However, it is currently unclear whether aging, per se, is associated with enhanced endothelin-1 system activity. We hypothesized that endothelin-1 vasoconstrictor activity is g...
OBJECTIVE To determine the risk of lung cancer associated with exposure at home to the radioactive disintegration products of naturally occurring radon gas. DESIGN Collaborative analysis of individual data from 13 case-control studies of residential radon and lung cancer. SETTING Nine European countries. SUBJECTS 7148 cases of lung cancer and 14,208 controls. MAIN OUTCOME MEASURES Relat...
In this note we determine the Bernstein-Sato polynomial bQ(s) of a generic central arrangement Q = ∏k i=1 Hi of hyperplanes. We establish a connection between the roots of bQ(s) and the degrees of the generators for the top cohomology of the corresponding Milnor fiber. This connection holds for all homogeneous polynomials. We also introduce certain subschemes of the arrangement determined by th...
The objective: to compare treatment efficacy of pulmonary tuberculosis patients with multiple (MDR) and extensive drug resistance (XDR) using a standard chemotherapy regimen the containing bedaquiline. Subjects Methods. A retrospective study was conducted analyze outcomes in 219 MDR/XDR Mycobacterium (MTB) aged 18-75 years old who were treated in-patient out-patient facilities St. Petersburg from...
آشکار سازهای cr-39 بصورت وسیع در اندازگیری گاز رادن و دختران آن در هوا مورد استفاده قرار میگیرند . سعی شده است که با استفاده از شبیه سازی مونت کارلو امکان استفاده مستقیم cr-39 برای اندازگیری رادن و دختران آن در آب بررسی شود . باتصادفی فرض کردن موقعیت وزاویه ارسال ذرات آلفای رادن ودختران آن ضریب حساسیت آشکار ساز cr-39 در هوا , آب, هگزان,روغن زیتون و سیکلوهگزان محاسبه شده است. استفاده از cr-39 در...
The present study was carried out to determine the activity concentrations of 40K, 226Ra and 232Th in surface soil samples collected from twenty five different locations of Industrial Yanbu city located in western region of Saudi Arabia, using a NaI(Tl) gamma-ray spectrometer. The activity concentrations of 226Ra, 232Th and 40K in the soil samples from the studied area ranged from 25.21 Bq kg t...
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