JNK,即c-Jun氨基末端激酶,是丝裂原活化蛋白激酶(mitogen activated protein kinase,MAPK)家族中一员。近些年有关它的研究一直相当活跃,它被发现与生物细胞增殖、凋亡、分化有着紧密联系,同时,许多疾病的发生也与它的活化密切相关。本...JNK,即c-Jun氨基末端激酶,是丝裂原活化蛋白激酶(mitogen activated protein kinase,MAPK)家族中一员。近些年有关它的研究一直相当活跃,它被发现与生物细胞增殖、凋亡、分化有着紧密联系,同时,许多疾病的发生也与它的活化密切相关。本文将通过详细阐述JNK信号通路与眼部结构所受各胞外刺激的关系,介绍最新研究进展,从而为治疗眼部疾病找到新的参考依据。展开更多
JS 1 is the water soluble polysaccharide isolated by alkaline from Hippophae rhamnoides L.. By means of IR, GC, GC MS, 13 C NMR, periodate oxidation, Smith degradation, mathylation analysis and partial acid hydrolysis...JS 1 is the water soluble polysaccharide isolated by alkaline from Hippophae rhamnoides L.. By means of IR, GC, GC MS, 13 C NMR, periodate oxidation, Smith degradation, mathylation analysis and partial acid hydrolysis etc., JS 1 is a kind of neutral heteropolysaccharide with many branches. It consists of Ara, Xyl, Gal and Glc in a molar ratio of 1∶6∶12∶4 in turn. Its basic structure consists of a main chain composed of(1→3) linked Xyl,(1→3) linked Gal and (1→3) linked Glc residues with side chains of (1→5) linked Xyl, (1→4) linked Gal and (1→6) linked Gal residues, attached to C 2 of Xyl and C 6 of Gal residues in the main chain.展开更多
对于高分辨率相机所成图像,数据量非常巨大,仅用软件压缩远远不能满足实时性要求。本文提出一种适于硬件实现图像压缩算法——整数双正交小波变换的提升算法,并用DSP(Digital Signal Processing)芯片实现该种算法。由于输入的图像的灰...对于高分辨率相机所成图像,数据量非常巨大,仅用软件压缩远远不能满足实时性要求。本文提出一种适于硬件实现图像压缩算法——整数双正交小波变换的提升算法,并用DSP(Digital Signal Processing)芯片实现该种算法。由于输入的图像的灰度值是整数,为减少误差,我们把滤波器的参数也设计成整数形式,这种小波的计算只需两个浮点运算和16个整数运算,降低运算的复杂度,减少存储空间,进而提高实时性。并结合SPIHT编码方法提高压缩比(可达到31.25)。展开更多
Carthamus tinctorius L. is a kind of Chinese traditional and herbal drugs. Polysaccharides as effective ingredients have extensive pharmaceutic values especially as the immune regulators. CTP is the water soluble poly...Carthamus tinctorius L. is a kind of Chinese traditional and herbal drugs. Polysaccharides as effective ingredients have extensive pharmaceutic values especially as the immune regulators. CTP is the water soluble polysaccharide isolated from the Carthamus tinctorius L.. By means of HPLC, partial hydrolysis with acid, periodate oxidation, Smith degradation, GC, methylation and GC-MS analysis, {}+{13}C NMR spectroscopy, the structure of CTP was identified. CTP is a kind of small molecular weight polysaccharide with many branches. The main chain of CTP is made up of(1→4)-linked-Glc with five side chains. They are(1→3,6), (1→6), (1→)-linked-Gal, (1→2)-linked-Glc, (1→6), (1→)-linked-Glc, and two(1→6)-linked-Glc respectively.展开更多
文摘JNK,即c-Jun氨基末端激酶,是丝裂原活化蛋白激酶(mitogen activated protein kinase,MAPK)家族中一员。近些年有关它的研究一直相当活跃,它被发现与生物细胞增殖、凋亡、分化有着紧密联系,同时,许多疾病的发生也与它的活化密切相关。本文将通过详细阐述JNK信号通路与眼部结构所受各胞外刺激的关系,介绍最新研究进展,从而为治疗眼部疾病找到新的参考依据。
文摘JS 1 is the water soluble polysaccharide isolated by alkaline from Hippophae rhamnoides L.. By means of IR, GC, GC MS, 13 C NMR, periodate oxidation, Smith degradation, mathylation analysis and partial acid hydrolysis etc., JS 1 is a kind of neutral heteropolysaccharide with many branches. It consists of Ara, Xyl, Gal and Glc in a molar ratio of 1∶6∶12∶4 in turn. Its basic structure consists of a main chain composed of(1→3) linked Xyl,(1→3) linked Gal and (1→3) linked Glc residues with side chains of (1→5) linked Xyl, (1→4) linked Gal and (1→6) linked Gal residues, attached to C 2 of Xyl and C 6 of Gal residues in the main chain.
文摘对于高分辨率相机所成图像,数据量非常巨大,仅用软件压缩远远不能满足实时性要求。本文提出一种适于硬件实现图像压缩算法——整数双正交小波变换的提升算法,并用DSP(Digital Signal Processing)芯片实现该种算法。由于输入的图像的灰度值是整数,为减少误差,我们把滤波器的参数也设计成整数形式,这种小波的计算只需两个浮点运算和16个整数运算,降低运算的复杂度,减少存储空间,进而提高实时性。并结合SPIHT编码方法提高压缩比(可达到31.25)。
文摘Carthamus tinctorius L. is a kind of Chinese traditional and herbal drugs. Polysaccharides as effective ingredients have extensive pharmaceutic values especially as the immune regulators. CTP is the water soluble polysaccharide isolated from the Carthamus tinctorius L.. By means of HPLC, partial hydrolysis with acid, periodate oxidation, Smith degradation, GC, methylation and GC-MS analysis, {}+{13}C NMR spectroscopy, the structure of CTP was identified. CTP is a kind of small molecular weight polysaccharide with many branches. The main chain of CTP is made up of(1→4)-linked-Glc with five side chains. They are(1→3,6), (1→6), (1→)-linked-Gal, (1→2)-linked-Glc, (1→6), (1→)-linked-Glc, and two(1→6)-linked-Glc respectively.
