نتایج جستجو برای: سروتیپ o3
تعداد نتایج: 7720 فیلتر نتایج به سال:
An ozone exposure assessment study was conducted in a Southern California community. The Harvard ozone passive sampler was used to monitor cohorts of 22 and 18 subjects for 8 weeks during the spring and fall of 1994, respectively. Ozone exposure variables included 12-hr personal O3 measurements, stationary outdoor O3 measurements from a continuous UV photometer and from 12-hr Harvard active mon...
Ozone (O3) phytotoxicity has been reported on a wide range of plant species. However, scarce information has been provided regarding the sensitivity of semi-natural grassland species, especially those from dehesa Mediterranean grasslands, in spite of their great biological diversity and the high O3 levels recorded in the region. A screening study was carried out in open-top chambers (OTCs) to a...
Prostate cancer is the most common cause of cancer-related deaths in men. Current practices for treatment of prostate cancer are less than satisfactory because of metastasis and recurrence, which are primarily attributed to angiogenesis. Hence, anti-angiogenesis treatment is becoming a promising new approach for prostate cancer therapy. In addition to treating acute promyelocytic leukemia, arse...
Metal-support interfaces play a prominent role in heterogeneous catalysis. However, tailoring the metal-support interfaces to realize full utilization remains a major challenge. In this work, we propose a graceful strategy to maximize the metal-oxide interfaces by coating confined nanoparticles with an ultrathin oxide layer. This is achieved by sequential deposition of ultrathin Al2 O3 coats, P...
[1] A case of long-range transport of a biomass burning plume from Alaska to Europe is analyzed using a Lagrangian approach. This plume was sampled several times in the free troposphere over North America, the North Atlantic and Europe by three different aircraft during the IGAC Lagrangian 2K4 experiment which was part of the ICARTT/ ITOP measurement intensive in summer 2004. Measurements in th...
پانصد نمونه مدفوع از گوساله های زیر یکماه مبتلا به اسهال از هفت گاوداری شیری در اطراف تهران در طی یک دوره یکساله (از مهرماه 1377 تامهرماه 1378) جمع آوری گردیده و با استفاده از کیت الیزا از نظر روتاویروس گروه A مورد ارزیابی قرار گرفت. میزان شیوع عفونتهای روتاویروسی 8/28 درصد برآورد گردید. تعداد 24 نمونه مدفوع مثبت از نظر روتاویروسی گاوی به طور تصادفی انتخاب و با استفاده از پادتنهای تک بنیانی ضد ...
[1] An episodic simulation is conducted to characterize ozone (O3) formation and to investigate the dependence of O3 formation on precursors in the Houston-Galveston (HG) area using a regional chemical transport model (CTM). The simulated net photochemical O3 production rates, P(O3), in the Houston area are higher than those in most other U.S. urban cities, reaching 20–40 ppb hr 1 for the dayti...
Previous studies that used neonatal capsaicin (Cap) treatment to ablate C fibers indicate that C fibers act to inhibit lung damage and airway hyperresponsiveness after ozone (O3) exposure in rats. The purpose of this study was to determine 1) the role of tachykinins in these protective effects and 2) whether differences in minute ventilation (VE) during O3 exposure might account for the effect ...
Downward transport of ozone (O3) from the stratosphere can be a significant contributor to tropospheric O3 background levels. However, this process often is not well represented in current regional models. In this study, we develop a seasonally and spatially varying potential vorticity (PV)-based function to numerically assimilate upper tropospheric / lower stratospheric (UTLS) O3 in a chemistr...
[1] We investigated the potential effects of elevated ozone (O3) along with climate variability, increasing CO2, and land use change on net primary productivity (NPP) and carbon storage in China’s terrestrial ecosystems for the period 1961–2000 with a processbased Dynamic Land Ecosystem Model (DLEM) forced by the gridded data of historical tropospheric O3 and other environmental factors. The si...
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