نتایج جستجو برای: h30
تعداد نتایج: 182 فیلتر نتایج به سال:
The large differences between gas phase and solution phase basicities highlight the dramatic effects of solvation on ion chemistry. Strong aqueous acids such as HN03 can possess a proton affinity in the gas phase that is higher than that of H20. By clustering water molecules sequentially to a protonated nitric acid, the structure and properties of the ion will evolve towards the solvated form. ...
کانی شناسی بخش رس و ژئوشیمی خاکهای تشکیل شده از سنگ های مادری دگرگون و آذرین قلیایی در ناحیه لاهیجان
The mineralogical and geochemical composition of the soils of three representat ive pedons fanned on basaltic andesite, andes itic basalt and phyllite were investigated. Results by XRF showed that progressive weathering of rocks have been marked by gradual accumulation of AI, Fe, Ti, Mg. H30+ and depletion of Na, K, Ca and Si in the soi l; although, predominant clay, loss and gain trend of...
بودجه نقشی مهم در مدیریت و ادارة بخش عمومی ایفا می کند. یکی از مهم ترین اجزای بودجه پیش بینی درآمد است و بدون داشتن دقت لازم در پیش بینی درآمد، دولت ها در جلوگیری از کسری و آمادگی به منظور مقابله با آن ناتوان اند و مردم از کاهش خدمات ضروری و مهمی، همچون آموزش، بهداشت و ...، که دولت ارائه می کند، متحمل زیان خواهند شد. در این پژوهش فرضیة انتظارات عقلایی در پیش بینی دولت از درآمدهای مالیاتی به کار...
Pigs are important reservoirs of Shiga toxin-producing Escherichia coli (STEC). The entrance of these strains into the food chain implies a risk to consumers because of the severity of hemolytic uremic syndrome. This study reports the prevalence and characterization of STEC throughout the pork production chain. From 764 samples, 31 (4.05%) were stx positive by PCR screening. At farms, 2.86% of ...
Large-scale bacterial genome sequencing efforts to date have provided limited information on the most prevalent category of disease: sporadically acquired infections caused by common pathogenic bacteria. Here, we performed whole-genome sequencing and de novo assembly of 312 blood- or urine-derived isolates of extraintestinal pathogenic (ExPEC) Escherichia coli, a common agent of sepsis and comm...
Multidrug-resistant Escherichia coli infections are a growing public health concern. This study analyzed the possibility of contamination of commercial poultry meat (broiler and free-range) with pathogenic and or multi-resistant E. coli in retail chain poultry meat markets in India. We analyzed 168 E. coli isolates from broiler and free-range retail poultry (meat/ceca) sampled over a wide geogr...
Energetic oxygen precipitation is one possible explanation for the auroral molecular hydrogen emissions observed by the Voyager ultraviolet spectrometer. These ions deposit their energy in the Jovian thermosphere by means of ionization, dissociation, excitation, and heating processes. The photochemistry of both the neutral gas and the ionosphere is altered by the influx of atomic oxygen. The au...
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