7 research outputs found

    全蚕粉对免疫功能影响的实验研究

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    目的探讨全蚕粉对小鼠免疫功能的影响。方法观察全蚕粉对环磷酰胺所致免疫低下小鼠免疫器官指数、碳廓清功能和血清溶血素的影响。结果全蚕粉可增强正常小鼠免疫功能,显著提高免疫低下小鼠胸腺指数、脾脏指数、碳廓清能力和血清溶血素含量。结论全蚕粉对机体免疫功能有一定增强作用

    Tangut Fragments Newly Discovered at the National Library of China

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    This article introduces eight blockprint fragments in the Tangut script from the National Library of China. The fragments are mistakenly given shelf numbers with “Uighur Script 15,” because they have mingled with the other Old Uighur documents. One of the fragments belongs to a Tangut version of the Mūlasarvāstivāda Bhikṣuṇī Vinaya, a unique text among thus far known Tangut Buddhist scriptures: its backside was reused for a Tibetan Buddhist prayer. The other seven fragments all come from Volume 42 of the Mahāvaipulya Buddhāvataṃsaka Sūtra of the same version as the Lingwu 灵武 edition, printed in Hangzhou during the Yuan period. Although the provenance of these fragments cannot be fully elucidated, they were most probably discovered at the Dunhuang caves and brought to Beijing together with other Old Uighur fragments

    Production of top Quark pair at the large hadron collider(大型强子对撞机中顶夸克对的产生)

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    通过分析质心能量为8 TeV的质子-质子对撞实验,对大型强子对撞机上的ATLAS探测器,测量了顶夸克对产生过程pp→t的归一化微分散射截面,该实验数据对胶子部分子分布函数的确定非常重要.采用蒙特卡罗数值计算程序MadGraph以及CT10NNLO和CT14NNLO部分子分布函数,分别计算此过程的归一化微分散射截面,得到了与ATLAS实验相符的结果.进一步,用ATLAS实验数据和本文的理论计算结果,更新CT14NNLO部分子分布函数.结果显示,顶夸克对归一化微分散射截面对部分子分布函数不敏感.理论计算结果与ATLAS实验测量结果在误差范围内相符,该过程胶子部分子分布函数无明显变化

    博尔塔拉河流域土壤有机碳的空间结构分析[J]

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    利用描述性统计分析和地统计分析,对博尔塔拉河流域0—20cm深度土壤有机碳的空间分布特征进行了研究。结果表明:博尔塔拉河流域土壤有机碳符合正态分布;半方差函数分析表明,博河上部和下部有机碳较好地符合高斯模型分布,中部有机碳符合线型模型分布。块金值与基台值的比值表明博河上部土壤有机碳含量的空间相关性很弱,说明随机性因素(如施肥、耕作措施、种植制度等各种人为活动)引起的空间变异起主要作用;中部和下部土壤有机碳含量表现为中等空间相关性,表明结构性(如气候、母质、地形、土壤类型、自然因素等)因素和随机因素共同起作用。Kriging插值表明:(1)博尔塔拉河流域土壤有机碳的空间分布特征主要以斑块状为主,..
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