نتایج جستجو برای: ah3
تعداد نتایج: 44 فیلتر نتایج به سال:
Europe is coming to the end of its autumn-winter wave of the 2009 influenza A(H1N1) pandemic. Transmission has been continuing in the east and south-east of Europe, but the signs from other parts of Europe before Christmas indicated that the circulation of the pandemic influenza A(H1N1) virus was declining. Though as is to be expected the associated burden on hospitals and especially on intensi...
Early-age hydration with neutral or alkaline (0 M to 8 M) solutions was studied in calcium sulfoaluminate clinker (CSA) using isothermal conduction calorimetry, X-ray diffraction (both continuous and discontinuous, i.e., after detaining isopropanol) infrared spectroscopy. Hydration 0.1 NaOH observed be similar water. At the next highest concentration (1 M), however, reaction rate slower, due pr...
BACKGROUND It has been observed that, historically, strains of pandemic influenza led to succeeding seasonal waves, albeit with decidedly different patterns. Recent studies suggest that the 2009 A(H1N1)pdm09 pandemic has had an impact on the circulation patterns of seasonal influenza strains in the post-pandemic years. In this work we aim to investigate this issue and also to compare the relati...
Initial hydration and setting were continuously monitored in calcium sulfoaluminate clinker (KCSA) mixed with water or 2 M NaOH isothermal conduction calorimetry, ultrasonic pulse velocity (UPV) measurement, the Vicat apparatus, (in- ex-situ) X-ray diffraction. P-wave acceleration (ap) proved highly useful to detect very rapid initial reactions, not generally perceptible other techniques. Setti...
در این پایان نامه ابتدا از تراکم نین هیدرین و مشتقات دی کتونی مشتقات a3،b8-دی-هیدروکسی-2-متیل-4-اکسو-4،b8-دی هیدرو-ah3-ایندنو[1،2-b]فوران تهیه شد و سپس از طریق واکنش شکست اکسایشی آن ها توسط نمک پریدیک اسید مشتقات 5-متیل-3،3-دی اکسو-h3،h3-اسپیرو[فوران-2،1-ایزوبنزوفوران] سنتز شدند (طرح 1). طرح 1 در ادامه، مشتقات اسپیرو[ایزوبنزوفوران-1،?6-پیرولو[3،2-d]پیریمیدین] به صورت تک ظرف از طریق واک...
The sensitivity of rapid diagnostic kits to influenza B is lower than to influenza A. The cause-poor performance of the kit or the scarcity of viruses in type B specimens-has yet to be clarified. Using real-time PCR, we measured the amount of influenza viruses with nasopharyngeal aspirate fluid previously identified by virus isolation culture and passing the rapid diagnosis test by four types o...
Preparation of Micro-Iron Ore Tailings by Wet-Grinding and Its Application in Sulphoaluminate Cement
Herein, micro iron ore tailings (micro-IOTs) were prepared by wet-grinding and applied to improve sulphoaluminate cement (SAC) performance. The physicochemical properties of micro-IOTs investigated particle size analysis, XRD, XPS. hydrates trait the hydration mechanism micro-IOTs-SAC composite studied TGA, MIP, SEM. results demonstrated that with an average grain diameter 517 nm could be obtai...
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