主题：【求助】(已应助，除两篇馆藏)兄弟求助4篇文献，谢谢！

1 ok.

Determination of biotin concentration by a competitive enzyme-linked immunosorbent assay (ELISA) method---JBiochemBiophysMet.pdf

4 ok.

A new assay method for biotin in blood, serum, urine, and tissues---AnalBiochem.pdf

3 电子版可用从1998年开始，请寻求馆藏。
参考：
http://content.karger.com/ProdukteDB/produkte.asp?Aktion=JournalHome&ProduktNr=224215&ContentOnly=false

2 not ok.
没有电子版，
参考：
http://journalseek.net/cgi-bin/journalseek/journalsearch.cgi?field=issn&query=0023-6764

除全文外的相关信息如下：
QUANTIFICATION AND LOWERING OF SERUM BIOTIN
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Author(s): ROSEBROUGH SF, HARTLEY DF
Source: LABORATORY ANIMAL SCIENCE    Volume: 45    Issue: 5    Pages: 554-557    Published: OCT 1995 
Times Cited: 6    References: 20   
Abstract: An enzyme-linked assay was developed to quantify serum biotin concentrations in experimental animals and humans. With this assay the effect on serum biotin concentration after intravenous injection of streptavidin or the addition of avidin to food was studied in rabbits and doffs. Intravenous injection of streptavidin reduced serum biotin values quickly but temporarily, in a dose-dependent manner in both species. Addition of avidin to the diet lowered biotin values approximately four- to fivefold in the rabbits, with resultant biotin concentrations similar to those of humans.
Document Type: Article
Language: English
KeyWords Plus: AVIDIN; PLASMA; STREPTAVIDIN; ASSAY; PHARMACOKINETICS; PROTEIN
Addresses: ROSEBROUGH, SF (reprint author), UNIV ROCHESTER, MED CTR, DEPT RADIOL, ROCHESTER, NY 14642 USA
Publisher: AMER ASSOC LABORATORY ANIMAL SCIENCE, 70 TIMBERCREEK DR, SUITE 5, CORDOVA, TN 38018
IDS Number: TB765
ISSN: 0023-6764

非常感谢楼上板油！