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¡¾×ÊÔ´¡¿½ºÌå½ðÊé "Colloidal Gold. A new perspective for cytochemical
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×öÃâÒß½ºÌå½ðʱ¿´µ½µÄÒ»¸öС²á×Ó£¬×î½ü³£Ôڲο¼ÎÄÏ×ÖгöÏÖ¡£ÍÐUSµÄÅóÓÑÃèµÄ¡£Ï£ÍûÓÐÓ㺠Beesley, J. (1989). "Colloidal Gold. A new perspective for cytochemical marking." Royal Microscopical Society Handbook No 17; Oxford University Press: Oxford, U.K. ˳±ãÎÊÎÊ´ó¼Ò²â½ºÌå½ðµÄPHÓÃʲô²âµÄ£¬PHÊÔÖ½»¹ÊÇPH¼Æ£¿²»ÖªÓÐûÓиßÈËÓùýgel-filledµÄPHµç¼«£¿ÏÖÔÚÎÒµÄÎÊÌâÊÇÕâÑùµÄ£¬²â½ºÌå½ðÈÜҺʱ£¬ÓÃPHÊÔÖ½ºÍPH¼Æ£¨ÉϺ££©»áÏà²î2¸öPHµ¥Î»¡£ºÜ¿ÉÄÜÊÇÕâ¸öÆÕͨPH¼Æ±»¶ÂµôÁË¡£ÔçÆÚµÄ¾µäÎÄÏ×Öн¨Òé²â½ºÌå½ðʱÓÃgel-filledµÄPHµç¼«¡£ËûÃÇÊÇÈç´ËÃèÊöµÄ£º 1.Beesley, J. (1989) £ºThe pH ofthe colloid is an important factor in these reactions. It is inadvisable to use pH paper for estimating the pH of the sol because this method is not sufficiently accurate. A pH electrode is the preferred equipment but the gold sol will plug the pores unless suitable precautions are taken. Electrode damage is prevented by the addition of a few drops of 1 per cent aqueous polyethylene glycol (MW 20000) or carbowax-M to a few millilitres of the colloid before measuring the pH (Lucocq and Roth 1985). This stabilized colloid must be discarded after the pH measurement is taken. Alternatively, a gel-filled combination electrode may be used, in which case contact between the gold sol and the electrode should be kept to a minimum. 2.Geoghegan, W. and G. Ackerman (1977).£ºTo check the pH of colloidal gold two drops of 1% polyethylene glycol (PEG) MW. 20,000 were added to 10 ml of colloidal gold to stabilize it before the pH electrode was inserted. Failure to stabilize the gold before measuring pH results in the porus plug or wick of the electrode becoming plugged with colloidal gold, presumably flocculated by the KC1 in the electrode (we found estimates made with pH paper to vary by as much as 0.5 units). 3. The pH of the colloidal gold was measured with a gel-filled combination electrode(Bradley-James Corp., Santa Anna,CA) which has the advantage of having a low electrolyte flow rate.Other types of electrodes were not used since they were quickly plugged by the colloidal gold at the electrode solution junction http://d.namipan.com/d/3abac25d79018f30a8a1e2983a4c2d68c9e1bd4cd3f64500 ֮ǰµÄÎļþÃû±»ËµÊÇÎÞЧ£¬ÖØÃüÃûÔÙѹËõÁË£¬Ó¦¸Ã¿ÉÒÔÏÂÁË¡£²»ºÃÒâ˼°¡¡£¹þ¹þ¡£ [ Last edited by dylee on 2010-8-28 at 23:07 ] 2013,MAY update ֮ǰµÄ¸½¼þʧЧ£¬ÏÖÓÃľ³æ×Ô´øµÄ¹¤¾ßÉÏ´«²¹ÉÏ¡£ENJOY IT.[ Last edited by dylee on 2013-5-14 at 11:14 ] |
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