توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱Investigation of yield stress of Zn doped La2O3 nano crystallites with using Williamson–Hall equation and Hall– Petch effect
نویسنده(ها): ، ،
اطلاعات انتشار: سومین همایش ملی تکنولوژی های نوین در شیمی، پتروشیمی و نانو ایران، سال
تعداد صفحات: ۸
Nanocrystalline materials have been the subject of widespread research over the past couple of decades. However, it should be realized that a full understanding of the structure, thermal stability, and properties of these novel materials is not yet available. A number of issues and concerns still need to be solved.In the present work, the Zn doped La2O3 nanocrystallites have been synthesized with sol–gel method. Strain and yield stress of samples have been studied by XRD (X–Ray Diffraction), X–Powder software, Hall–Petch effect and Williamson– Hall equation.The obtained results show that a sample with molar ratio of Zn\La: 1\4 has lower strain and therefore higher yield stress respect with the other present samples, meaning, they have good mechanical stability<\div>

۲Experimental pathogenicity of shrimp, Penaeus vannamei exposed to monodon baculovirus (MBV)
اطلاعات انتشار: IRANIAN JOURNAL OF FISHERIES SCIENCES، چهاردهم،شماره۲، Apr ۲۰۱۵، سال
تعداد صفحات: ۸
The objective of our study was to explain the histopathological changes of monodon baculovirus (MBV) in hepatopancreas and midgut tissues of the cultured Penaeus vannamei. Five–hundred and forty juvenile of P. vannamei with average size of 7.99±0.54 g and 3600 post larvae 10–15 were distributed to 18 glass aquariums (50×50×60cm) with 100L well aerated water per each aquarium as water borne MBV (group A) and food borne MBV (Group B) and one control group (C), in triplicates. Also, 3600 post larvae were dedicated for water borne exposure (D) based on one time immersion exposure in 24 h without water exchange and the untreated group was studied as control in triplicates. The specific pathological sign of MBV was observed as a multiple intranuclear eosinophilic occlusion bodies (OBs) in hepatopancreas and midgut tissues. Our result indicates that the severity of the MBV infection is more considerable in post larvae than juvenile stage and confirms that MBV can be an invasive pathogen for shrimp culture industry in Iran.
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