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- ³æºÅ: 557161
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2Â¥2008-05-15 17:24:49
chengcj.2008
ÖÁ×ðľ³æ (ÖªÃû×÷¼Ò)
- ·ÒëEPI: 9
- Ó¦Öú: 113 (¸ßÖÐÉú)
- ½ð±Ò: 12448
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lijihn(½ð±Ò+2,VIP+0):»¹¿ÉÒÔ
lijihn(½ð±Ò+2,VIP+0):»¹¿ÉÒÔ
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ÎÒרҵ²»ÊÇÌ«¶Ô¿Ú,ÊÔһϰÉ: Research results indicated that natural moisturizing factors (NMF) were present in the stratum corneum of human skin, and NMF contain amino acids which are quite similar to the components of sericin. Therefore, sericin has good moisture-keeping property and skin moistening performance. Further study showed that sericin had the following functions except moisture keeping property: antioxidant, inhibiting tyrosine kinase thus inhibiting formation of melanin, activating skin cells, stimulating their regeneration, antitumor, anti-ageing, promoting gastro-intestinal digestion as well as skin care and beauty. Cosmetics using sericin as additives have been on the market in Japan, which include body moisturizer, face cleanser, face milk, body wash, hair shampoo, hair care cream, etc. More than 90% of the 18 amino acids in sericin can be absorbed, and over 17% of the amino acids are necessary for humans, which is higher than common foods. So, sericin can be used as good food additives. Sericin may function as antioxidants in foodstuffs because it inhibits the activity of polyphenol oxidase. Also, sericin promotes the absorption of zinc, iron, magnesium, calcium. ˮƽÓÐÏÞ, ¾ÍÒëÕâÒ»¶Î°É. |
3Â¥2008-05-17 14:21:38
chengcj.2008
ÖÁ×ðľ³æ (ÖªÃû×÷¼Ò)
- ·ÒëEPI: 9
- Ó¦Öú: 113 (¸ßÖÐÉú)
- ½ð±Ò: 12448
- É¢½ð: 3622
- ºì»¨: 6
- Ìû×Ó: 5873
- ÔÚÏß: 581.5Сʱ
- ³æºÅ: 548215
- ×¢²á: 2008-04-18
- רҵ: ÓлúºÏ³É
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lijihn(½ð±Ò+15,VIP+0):ËäÈ»·ÒëµÄ²»ÔõÑù£¬µ«»¹ÊÇҪллÄ㡣гæ
lijihn(½ð±Ò+15,VIP+0):ËäÈ»·ÒëµÄ²»ÔõÑù£¬µ«»¹ÊÇҪллÄ㡣гæ
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µÚ¶þ¶Î: In recent years, functionalization and application of dendrimers has been concerned, especially the preparation of metal nano-particles contained in dendrimers. However, its application in sensors is seldom reported. Bustos E B et al. has prepared hydroxy terminated G5 dendrimer in which Ir, Pt and Rh nano-particles were packed respectively, then, these particles were immobilized in glassy-carbon electrode surface and used as current detector in HPLC. The detection limit of this detector decreased apparently commpared with that of UV-Vis detector. Frank N C et al. has prepared PAMM dendrimer containing gold nano-particle for the first time, and cobalt iron cyanide can also be packed in dendrimers to obtain PAMM dendrimer containing gold and cobalt iron cyanide nano-particles. The consecutive membrane modified electrode of polyviny acid/PAMM dendrimers containing gold and cobalt iron cyanide nano-particles was prepared via LLB self-assembly by using indium tin oxide as matrix electrode. Glucose oxidase and bovine serum albumin(BSA) were immobilized in modified electrode with the aid of glutaraldehyde linker, and the determination of glucose was implemented successfully. |
4Â¥2008-05-17 17:16:51














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