The Comparative Enzymology of Lactic Dehydrogenases. II. Properties of the Crystalline HM3Hybrid from Chicken Muscle and of H2M2Hybrid and H4Enzyme from Chicken Liver*

Biochemistry ◽  
1964 ◽  
Vol 3 (4) ◽  
pp. 522-530 ◽  
Author(s):  
Thomas P. Fondy ◽  
Amadeo Pesce ◽  
Irwin Freedberg ◽  
Francis Stolzenbach ◽  
Nathan O. Kaplan
1979 ◽  
Vol 21 (3) ◽  
pp. 352-365 ◽  
Author(s):  
Clarence H. Suelter ◽  
Debra Thompson ◽  
Gerard Oakley ◽  
Mary Pearce ◽  
H.David Husic ◽  
...  

2006 ◽  
Vol 89 (2) ◽  
pp. 369-373 ◽  
Author(s):  
Suxia Zhang ◽  
Jinhui Zhou ◽  
Jianzhong Shen ◽  
Shuangyang Ding ◽  
Jiancheng Li

Abstract A rapid and sensitive gas chromatography (GC) method was developed to detect chloramphenicol in chicken tissues. The extracted samples were cleaned up using the immunoaffinity column prepared by coupling antichloramphenicol monoclonal antibody with cyanogen bromide-activated Sepharose 4B. The dynamic column capacity of chloramphenicol was 3265 ng/mL gel. The eluate was evaporated to dryness, and residues were derivatized and determined by GC with a microcell electron capture detector. Average recoveries were 86.6 to 96.9 for chicken muscle and 74.3 to 96.1 for chicken liver. The limit of quantitation of the method was 0.05 ng/g for chicken muscle and 0.1 ng/g for chicken liver.


1966 ◽  
Vol 49 (4) ◽  
pp. 712-714
Author(s):  
John M Vanderen ◽  
E G Jaworski

Abstract A method, based on the fluorescence of ethoxyquin in iso-octane following a purification procedure, has been developed for the determination of ethoxyquin in egg yolk, chicken muscle, and chicken liver. Ethoxyquin is extracted from tissue with iso-octane and then transferred to dilute sulfuric acid by extraction. The acid is neutralized with sodium hydroxide, and the ethoxyquin is re-extracted by iso-octane. The fluorescence of this solution is then measured. This method gave recoveries of ethoxyquin from egg yolks, muscle, and liver ranging from 60 to 90%, depending upon the tissue and ethoxyquin concentration. The precision of the method is good, with an average standard deviation of 0.04 ppm for samples containing 0.50–2.50 ppm ethoxyquin.


Author(s):  
Soichiro Arai ◽  
Yuh H. Nakanishi

Although many electron microscopic studies on extracted chromatin have provided considerable information on chromatin condensation induced by divalent cations, there is only a little literature available on the effects of divalent cations on chromatin structure in intact nuclei. In the present study, the effects of Mg2+ on chromatin structure in isolated chicken liver nuclei were examined over a wide concentration range of Mg2+ by scanning electron microscopy.Nuclei were prepared from chicken liver by the method of Chauveau et al. with some modifications. The nuclei were suspended in 25 mM triethanolamine chloride buffer (pH7.4) with 1 mM EDTA or in the buffer with concentrations of MgCl2 varying from 1 to 50 mM. After incubation for 1 min at 0°C, glutaraldehyde was added to 1.8% and the nuclei were fixed for 1 h at 4°C. The fixed nuclei were mixed with 15% gelatin solution warmed at about 40°C, and kept at room temperature until the mixture set. The gelatin containing the nuclei was fixed with 2% glutaraldehyde for 2-4 h, and cut into small blocks. The gelatin blocks were conductive-stained with 2% tannic acid and 2% osmium tetroxide, dehydrated in a graded series of ethanol, and freeze-cracked with a razor blade in liquid nitrogen.


2017 ◽  
Vol 95 (4) ◽  
pp. 1565
Author(s):  
T. Xing ◽  
X. Zhao ◽  
P. Wang ◽  
H. Chen ◽  
X. Xu ◽  
...  

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