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Copyright of Science & Technology of Food Industry is the property of Science & Technology of Food Industry Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Shipin Kexue/ Food Science is the property of Food Science Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

利用高时空分辨率观测资料、多普勒、风廓线雷达资料和数值预报产品对2015年浙江2次强对流天气进行对比诊断分析.这2次过程差异显著，分别是较大范围短时暴雨和冰雹大风过程.短时暴雨发生在西风槽与位于日本的台风对峙形势下，中低层有低涡切变线，水汽条件好，中尺度云团不断原地生成并滞留；冰雹大风过程发生在副高边缘，东风波西移形势下，0 ℃层高度适宜，风垂直切变弱，风廓线雷达低层水平风速增大.但两者也有共同点，从风廓线雷达的探测数据看，高度及垂直风速均可以较好地体现降水的开始和结束.因此，强对流天气预报中，天气形势、雷达资料和物理量场对区分不同类别强对流天气具有较好的指示意义.

Copyright of Shipin Kexue/ Food Science is the property of Food Science Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Cellular cholesterol is known to be under homeostatic control in nonsteroidogenic cells, and this intrigued us to understand how such control works in steroidogenic cells that additionally use cholesterol for steroid hormone synthesis. We employed primary culture of rat ovarian granulosa cells to study how steroidogenic cells adapt to acquire sufficient cholesterol to meet the demand of active steroidogenesis under the stimulation of gonadotropin follicle-stimulating hormone (FSH) and cytokine transforming growth factor (TGF)β1. We found that TGFβ1 potentiated FSH to upregulate scavenger receptor class B member I (SR-BI) and LDL receptor (LDLR), both functional in uptaking cholesterol as hHDL3 and hLDL supplementation enhanced progesterone production, and the effect of each lipoprotein was completely or partially blocked by SR-BI selective inhibitor BLT-1. Uptaken cholesterol could also be stored in lipid droplets. Importantly, LDLR and SR-BI responded to sterol with different sensitivity. Giving cells lipoproteins or 25-hydroxycholesterol downregulated Ldlr but not Scarb1; Scarb1 was ultimately downregulated by excessive sterol accumulation under 25-hydroxycholesterol and aminoglutethimide (inhibitor of steroidogenesis) cotreatment. Furthermore, transcription factors sterol regulatory element-binding protein (SREBP)-2 and liver receptor homolog (LRH)-1 crucially mediated Ldlr and Scarb1 differential response to sterol challenge. This study reveals that ovarian granulosa cells retain the cholesterol homeostatic control machinery like nonsteroidogenic cells, although during active steroidogenesis, they utilize SR-BI to evade such feedback control.

Copyright of Shipin Kexue/ Food Science is the property of Food Science Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Shipin Kexue/ Food Science is the property of Food Science Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In order to determine an easy leaf age(LA)diagnostic method of panicle differentiation stage of sorghum, the panicle differentiation of sorghum and the relationship between differentiation stage and LA and leaf age index(LAI)were investigated. Hybrid cultivar ‘Jinyunuo 3' and conventional cultivar ‘Guojiaohong 1' were used as materials planted in three sowing dates, the panicle differentiation stage and corresponding LA were recorded. The results were as follows:(1)The panicle differentiation could be divided into five stages, i. e. vegetative stage, elongation stage, panicle branch differentiation stage, spikelet and floret differentiation stage, gynoecium and stamen formation stage. The sterile spikelet with stalk could develop to gynoecium and stamen formation stage.(2)With the detention of sowing date, the starting date of panicle differentiation was advanced, and the growth duration shorted, and LA and LAI of each stage of panicle differentiation were decreased, but there were differences among varieties.(3)The relationship between the panicle differentiation stage and LAI conformed to linear regression correlation, with a formula of panicle differentiation stage(Yi)to LAI(Xi) of Yi=bXi+a.(4)With the detention of sowing date, the parameter b and |a| in formula of ‘Jinyunuo 3' were increased, while those of ‘Guojiaohong 1' were decreased. To sum up, it is viable to infer panicle differentiation stage applying LAI, and the results provide theoretical basis for sorghum cultivation index management. [ABSTRACT FROM AUTHOR]

Copyright of China Mechanical Engineering is the property of Editorial Board of China Mechanical Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Guihaia is the property of Guihaia Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)