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1.
John D. Mckinney George C. Cavanagh J. T. Bell A. S. Hoversland D. M. Nelson J. Pearson R. J. Selkirk 《Journal of the American Oil Chemists' Society》1973,50(3):79-84
A multifaceted cooperative research program involving industry, government and universities was initiated to determine the
effects of feeding lactating dairy cows rations containing various levels of cotton-seed and cottonseed meal that had been
naturally contaminated with aflatoxins. Evidence is presented that ammoniation of aflatoxin-contaminated cottonseed and cottonseed
meal eliminates the aflatoxins, producing a product safe for feeding to ruminants. The aflatoxin M1 content of milk samples of individual cows receiving rations containing (a) prime cottonseed meal, (b) aflatoxin contaminated
meal, and (c) aflatoxin contaminated meal that had ammoniation treatment is reported. Data comparing results with (d) prime
cottonseed, (e) aflatoxin contaminated seed, and (f) aflatoxin-contaminated seed that had ammoniation treatment are also reported.
None of the milk samples from cows fed ammoniated rations contained any detectable M1 by the modified Jacobson et al. methodology used. The sensitibity of the method in this laboratory is 0.1 μg M1/liter of milk. Under the conditions of this study, aflatoxin M1 levels are related to the levels of aflatoxin B1 consumed in the diet of the cows. Conversion ratios are reported. Aflatoxin M1 levels in the milk, relative to the time of the cows’ initial ingestion of aflatoxin B1, the persistence of M1 in the milk after discontinuing ingestion of B1, and disappearance of M1 under the conditions of the analytical methodology used relative to storage time and temperatures, are reported for liquid
milk and for frozen milk. Milk containing the highest level of aflatoxin M1 was treated with rennet. An 80:20 partion of aflatoxin M1 was observed between curd and whey, respectively. 相似文献
2.
ATM is a broadband fast-packet technology, but its modern technological base should make it less expensive than existing circuit switching systems once economies of scale are reached. The article examines the use of ATM to address the growth of emerging narrowband services such as frame relay. ATM's flexibility in supporting variable rates and levels of service make it an ideal network technology to carry multiple services. While B-ISDN services promise many benefits to users, major issues must be addressed before such services can be available on a large scale. Utilizing ATM as a backbone technology to support the growing capacity needs of emerging narrowband services could facilitate more rapid introduction of ATM into the network infrastructure and speed delivery of future BISDN services 相似文献
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4.
尽管近年来发展了一系列先进的BOD测量仪器和方法,但是传统的标准稀释法仍然是一种可靠的测定方法.主要讨论了BOD5测定中的影响因素及其造成的误差.通过试验和对BOD5计算公式的分析,对BOD5测定数据的探讨,提出一种简便的测定计算方法及测定试验中应该注意的问题,以减小测定误差,取得真实可靠的数据. 相似文献
5.
J. D. Mckinney 《Journal of the American Oil Chemists' Society》1981,58(12):A935-A937
A proposed rapid and versatile method of analysis for aflatoxins in cottonseed products using Waters Associates’ Sep- Pak
silica cartridge clean- up is presented. Samples are extracted with acetonitrile/ water azeotrope and a filtered aliquot is
evaporated to dryness. A toluene/acetonitrile (96:4) solution of the dry extract is applied to a Sep- Pak column. Gossypol
derivatives and other artifacts are eluted with chloroform/ethyl ether (1:4). The Sep- Pak is then mated with either a Romer
minicolumn for rapid minicolumn application or a small column of acid alumina deactivated with 4% water to produce a clean
extract for quantitation by thin layer chromatography or high pressure liquid chromatography. 相似文献
6.
L. J. Ashworth John Mckinney J. L. Mcmeans 《Journal of the American Oil Chemists' Society》1967,44(7):394-396
Normal constituents of seed coats and fibers of fuzzy cotton seeds were found which can interfere with aflatoxin analyses
of embryos (meats). Aflatoxins were partially or totally obscured in chromatograms prepared with extracts containing these
constituents. A blue fluorescing substance with an RF approximating that of aflatoxin B was found to be a normal constituent of seed coats and fibers. This substance differs from
aflatoxins in several ways: it fades quickly from thin-layer chromatograms exposed to ultraviolet light, disappearing within
an hour; it does not form complexes with acetic acid- and formic acidthionyl chloride solutions or with trifluoroacetic acid;
it does not have the characteristic ultraviolet absorption bands of aflatoxins. 相似文献
7.
Reviews the book, The psychology of the criminal act and punishment by G. Zilboorg (see record 1954-08875-000). This book examines the motivation and consequences of punishment of the criminal and points to the "curative powers of healthy self-punishment which never becomes hostility." The author presents excellent suggested courtroom ethics for the representatives of the behavior sciences. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
8.
Reviews the book, An outline of abnormal psychology rev. ed., edited by G. Murphy and Arthur J. Bachrach (see record 1955-02647-000). This is not just another book on abnormal psychology, as the title may suggest, but a collection of readings which may be used either to supplement existing texts, or alone, as an aid to stimulating insight and understanding in the searching layman. As psychology's role in the community continues to be enlarged, there will be more and more need for authentic, readable, and relevant books such as this for the average reader. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
9.
Studies of commercial PSZ show that fractography is quite feasible. Although the fracture was predominately transgranular, it commonly originated from grain-boundary facets. This behavior indicates that strengths are controlled by energies less than those for polycrystalline fracture and are limited by grain boundaries. Appropriate heat treatment under reducing conditions gave strengths up to ≅ 600 MPa; Stoichiometry appears to be important . 相似文献
10.
John D. Mckinney 《Journal of the American Oil Chemists' Society》1975,52(6):213-213
The official Association of Official Analytical Chemists’ and American Oil Chemists’ Society’s methods for aflatoxin assay
of cottonseed products utilize 20% lead acetate solution to remove gossypol, fatty acids, and traces of lipids as insoluble
lead derivatives. The substitution of a 20% zinc acetate solution containing a trace of a trivalent metal chloride to precipitate
zinc derivatives yields, in some cases, superior cleanup of interfering compounds of primary extracts. 相似文献