[目的]探讨红景天[Rhodiola crenulata(Hook.f.et.Thoms.)H.Ohba]提取物对小鼠免疫功能的影响。[方法]将192只BALB/c小鼠随机分为4批,每批分为4组,分别为低、中、高3个剂量组和1个溶剂对照组,连续灌药(20 m l/kg.体重)30 d,测定各免疫...[目的]探讨红景天[Rhodiola crenulata(Hook.f.et.Thoms.)H.Ohba]提取物对小鼠免疫功能的影响。[方法]将192只BALB/c小鼠随机分为4批,每批分为4组,分别为低、中、高3个剂量组和1个溶剂对照组,连续灌药(20 m l/kg.体重)30 d,测定各免疫指标。[结果]高剂量组红景天提取物可提高小鼠碳廓清能力(P<0.05);中剂量和高剂量组能增强绵羊红细胞诱导小鼠DTH能力(P<0.05),促进NK细胞活性(P<0.05)和血清凝血素的生成(P<0.05),增加抗体生成细胞数的生成(P<0.05),并且能提高小鼠腹腔巨噬细胞吞噬鸡红细胞的能力(P<0.05),但对免疫器官/体重质量值和ConA诱导的小鼠脾淋巴细胞转化能力无显著影响。[结论]红景天提取物具有增强正常小鼠免疫力的功能,该研究为开发有食用价值的保健食品提供了试验依据。展开更多
本文基于产业内贸易理论,运用了格鲁贝尔--劳埃德(G-L)指数、Bruelhart边际产业内贸易指数以及Thom & Mc Dowell垂直和水平型产业内贸易指数,采用了UNCOMTRADE数据中中韩农产品贸易数据进行实证研究。结果显示中国和韩国农产品贸易...本文基于产业内贸易理论,运用了格鲁贝尔--劳埃德(G-L)指数、Bruelhart边际产业内贸易指数以及Thom & Mc Dowell垂直和水平型产业内贸易指数,采用了UNCOMTRADE数据中中韩农产品贸易数据进行实证研究。结果显示中国和韩国农产品贸易主要以产业间贸易为主,在产业内贸易内部,又主要是技术差异主导的垂直型产业内贸易,中韩两国农产品贸易结构存在着很强的互补性。因此,本文探索了中韩两国农产品贸易现状的原因,并提出了相应的政策建议。展开更多
In this paper, a criterion on the C^0-sufficiency for a function germ with non-isolated singularity is obtained analogously to that of Kuiper-Kuo for the case of isolated singularities. Moreover, the Kuiper Kuo condit...In this paper, a criterion on the C^0-sufficiency for a function germ with non-isolated singularity is obtained analogously to that of Kuiper-Kuo for the case of isolated singularities. Moreover, the Kuiper Kuo condition and the Thom condition for an analytic function germ with non-isolated singularity are proved to be equivalent.展开更多
This article first outlines the principle of a cognitive semiotics,and in this framework presents a sign classification taking into consideration the crucial importance of time.It then offers a stratified interpretati...This article first outlines the principle of a cognitive semiotics,and in this framework presents a sign classification taking into consideration the crucial importance of time.It then offers a stratified interpretation of the Lotmanian concept of semiosphere,and continues with a study of the contradiction holding between cultural and socio-functional meanings.This leads to an analysis of ethnic passions and ethnic identity,and finally to a new analysis of homo metonymicus,and the two underlying cognitive structures based on the genitive and the dative schemas,that orient the human imaginary,for better or for worse.展开更多
Iconicity and mimicry represent two distinct but related fields in semiotic studies. Academic history shows both fields have crossed the border between Nature and Culture and have thus blurred the distinction of the t...Iconicity and mimicry represent two distinct but related fields in semiotic studies. Academic history shows both fields have crossed the border between Nature and Culture and have thus blurred the distinction of the two domains in certain aspects. In terms of etymology and history of ideas, both terms are traceable to classical antiquity: one to Plato, the other to Aristotle. In modern research history, iconicity and mimicry have curiously converged in Peirce. For all their supposedly close relationship, the two areas have rarely crisscrossed and to date there has not been sufficient attention paid to "iconicity in mimicry" or "mimicry as icon"—except in biosemiotic studies, probably because of the empirical visibility, transparency and hence selfevidence of their identification. As to the fledgling applied science of biomimetics, for all its enviable achievements in engineering and industry, researchers in the field have shown little interest in the conceptual history of mimicry, let alone that of iconicity. The pages that follow will offer a philological excursus, which hopes to bring Peirce into rapport with Plato, and link current "biomimicry" to its classical prototype in Aristotle's writings on animals.展开更多
文摘[目的]探讨红景天[Rhodiola crenulata(Hook.f.et.Thoms.)H.Ohba]提取物对小鼠免疫功能的影响。[方法]将192只BALB/c小鼠随机分为4批,每批分为4组,分别为低、中、高3个剂量组和1个溶剂对照组,连续灌药(20 m l/kg.体重)30 d,测定各免疫指标。[结果]高剂量组红景天提取物可提高小鼠碳廓清能力(P<0.05);中剂量和高剂量组能增强绵羊红细胞诱导小鼠DTH能力(P<0.05),促进NK细胞活性(P<0.05)和血清凝血素的生成(P<0.05),增加抗体生成细胞数的生成(P<0.05),并且能提高小鼠腹腔巨噬细胞吞噬鸡红细胞的能力(P<0.05),但对免疫器官/体重质量值和ConA诱导的小鼠脾淋巴细胞转化能力无显著影响。[结论]红景天提取物具有增强正常小鼠免疫力的功能,该研究为开发有食用价值的保健食品提供了试验依据。
文摘本文基于产业内贸易理论,运用了格鲁贝尔--劳埃德(G-L)指数、Bruelhart边际产业内贸易指数以及Thom & Mc Dowell垂直和水平型产业内贸易指数,采用了UNCOMTRADE数据中中韩农产品贸易数据进行实证研究。结果显示中国和韩国农产品贸易主要以产业间贸易为主,在产业内贸易内部,又主要是技术差异主导的垂直型产业内贸易,中韩两国农产品贸易结构存在着很强的互补性。因此,本文探索了中韩两国农产品贸易现状的原因,并提出了相应的政策建议。
文摘In this paper, a criterion on the C^0-sufficiency for a function germ with non-isolated singularity is obtained analogously to that of Kuiper-Kuo for the case of isolated singularities. Moreover, the Kuiper Kuo condition and the Thom condition for an analytic function germ with non-isolated singularity are proved to be equivalent.
文摘This article first outlines the principle of a cognitive semiotics,and in this framework presents a sign classification taking into consideration the crucial importance of time.It then offers a stratified interpretation of the Lotmanian concept of semiosphere,and continues with a study of the contradiction holding between cultural and socio-functional meanings.This leads to an analysis of ethnic passions and ethnic identity,and finally to a new analysis of homo metonymicus,and the two underlying cognitive structures based on the genitive and the dative schemas,that orient the human imaginary,for better or for worse.
文摘Iconicity and mimicry represent two distinct but related fields in semiotic studies. Academic history shows both fields have crossed the border between Nature and Culture and have thus blurred the distinction of the two domains in certain aspects. In terms of etymology and history of ideas, both terms are traceable to classical antiquity: one to Plato, the other to Aristotle. In modern research history, iconicity and mimicry have curiously converged in Peirce. For all their supposedly close relationship, the two areas have rarely crisscrossed and to date there has not been sufficient attention paid to "iconicity in mimicry" or "mimicry as icon"—except in biosemiotic studies, probably because of the empirical visibility, transparency and hence selfevidence of their identification. As to the fledgling applied science of biomimetics, for all its enviable achievements in engineering and industry, researchers in the field have shown little interest in the conceptual history of mimicry, let alone that of iconicity. The pages that follow will offer a philological excursus, which hopes to bring Peirce into rapport with Plato, and link current "biomimicry" to its classical prototype in Aristotle's writings on animals.
