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4Â¥2009-07-10 18:23:31
lijz013
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2Â¥2009-07-10 18:20:56
monitor2885
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gaohaiyan(½ð±Ò+10,VIP+0):ллÄãµÄÈÈÐÄ£¬ºÇºÇ 7-12 15:09
gaohaiyan(½ð±Ò+10,VIP+0):ллÄãµÄÈÈÐÄ£¬ºÇºÇ 7-12 15:09
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Îȶ¨ÐÔ¿¼²ì±íÃ÷£¬AÔÚ505nm´¦µÄÎü¹â¶È²»ÊÜζȣ¬Ê±¼ä£¬pHÖµµÈÓ°Ïì¡£ÒÔ505nm´¦µÄÎü¹â¶ÈΪָ±ê£¬¿¼²ìÁËζȣ¬Ê±¼ä£¬pHÖµ£¬ÒÒ´¼Å¨¶È¶Ô¶ùAÌáȡЧ¹ûµÄÓ°Ï죬ȷ¶¨AµÄÌáÈ¡Ìõ¼þΪ70¡æ£¬40min£¬pH=10£®ÒÔAºÍÈýÂÈ»¯ÌúµÈΪÖ÷ÒªÔÁÏ£¬¿¼²ìÁËȾɫζȣ¬Ê±¼ä£¬pHÖµµÈ¶Ô°×É«êóţëȾɫЧ¹ûµÄÓ°Ïì¡£½á¹û±íÃ÷£¬ÔÚpHΪ9£¬Î¶È60¡æ£¬È¾É«Ê±¼äΪ30minµÄÌõ¼þÏ£¬¿É½«°×É«êóţëȾΪÀ¶É«¡£AÒѱ»ÁÐΪʳƷÌí¼Ó¼ÁÔö²¹Æ·ÖÖ£¬±¾ÊµÑé½á¹û±íÃ÷A×÷ΪÌìÈ»ÎÞ¶¾È¾·¢¼ÁµÄÖ÷³É·Ö¾ßÓÐÁ¼ºÃµÄÓ¦ÓÃǰ¾°¡£ Stability analysis showed that absorbance of A at 505nm had nothing with temperature, time, pH value, etc. Taken absorbance at 505nm as indicator, the impacts of some factors such as temperature, time, pH, ethanol concentration on extraction of A were studied. The optimization condition was to extract A at 70¡æ, 40min, pH=10. Then A and ferric chloride were selected to be as the main raw materials and this study also determined the key performances of dyeing temperature, time, and pH value to white yak hair coloration. The results showed that at pH=9, temperature 60¡æ, 30min for staining, a white yak hair could be dyed into blue. A has been classified as supplement in a food additive species. The experimental results showed that A, as main component of natural non-toxic dyes, will possess an excellent prospect in application. |

3Â¥2009-07-10 18:22:12
lixiaod001
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gaohaiyan(½ð±Ò+5,VIP+0):ллÄãµÄÈÈÐÄ 7-12 15:09
qingfeng877680(½ð±Ò+0,VIP+0):Ðֵܣ¬¿´µ½Äã³£À´·Ò뻥Öú°æÓ¦Öú£¬¸ÐлÄãµÄÖ§³Ö£¬µ«ÊÇ£¬ÈôÊÇÓ÷Ò빤¾ß·ÒëµÄÄÚÈÝ£¬ÇëÔÚÌû×Óǰ±êÃ÷¡¾»úÆ÷·Òë¡¿£¬Ð»Ð»ÄúµÄºÏ×÷£¡ 7-11 15:25
gaohaiyan(½ð±Ò+5,VIP+0):ллÄãµÄÈÈÐÄ 7-12 15:09
| Stability study shows that, A Division of the absorbance at 505nm from the temperature, time, pH value and so on. Department of absorbance to 505nm as an index of temperature, time, pH, ethanol concentration on the extraction of abuse effects of A to determine the extraction conditions for A to 70 ¡æ, 40min, pH = 10. To A and ferric chloride as the main raw material, etc., visited the dyeing temperature, time, pH value of the white yak hair coloring effect. The results showed that in pH 9, temperature 60 ¡æ, time for staining under the conditions of 30min, a white Yak hair can be dyed blue. A has been identified as a food additive added to the species, the experimental results show that as a natural non-toxic dyes A principal component of a good application prospects. |
5Â¥2009-07-11 14:34:44














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