scholarly journals Action mode of cuminaldehyde against Staphylococcus aureus and its application in sauced beef

LWT ◽  
2022 ◽  
Vol 155 ◽  
pp. 112924
Author(s):  
Hui Li ◽  
Mao Zhang ◽  
Keren Agyekumwaa Addo ◽  
Yigang Yu ◽  
Xinglong Xiao
2020 ◽  
pp. 100794
Author(s):  
Hong Yan ◽  
Yingying Lu ◽  
Xin Li ◽  
Yanglei Yi ◽  
Xin Wang ◽  
...  

2021 ◽  
Vol 94 ◽  
pp. 103632
Author(s):  
Shaoying Gong ◽  
Peng Fei ◽  
Qi Sun ◽  
Ling Guo ◽  
Liange Jiang ◽  
...  

Author(s):  
Masaatsu Koike ◽  
Koichi Nakashima ◽  
Kyoko Iida

Penicillin exerts the activity to inhibit the peptide cross linkage between each polysaccharide backbone at the final stage of wall-peptidoglycan biosynthesis of bacteria. Morphologically, alterations of the septal wall and mesosome in gram-positive bacteria, which were occurred in early time after treatment with penicillin, have been observed. In this experiment, these alterations were cytochemically investigated by means of silver-methenamine staining after periodate oxidation, which is applied for detection of localization of wall mucopolysaccharide.Staphylococcus aureus strain 209P treated with 100 u/ml of penicillin G was divided into two aliquotes. One was fixed by Kellenberger-Ryter's OSO4 fixative at 30, 60 and 120 min after addition of the antibiotic, dehydrated through alcohol series, and embedded in Epon 812 (Specimen A). The other was fixed by 21 glutaraldehyde, dehydrated through glycolmethacrylate series and embedded in glycolmethacrylate mixture, according to Bernhard's method (Specimen B).


Author(s):  
Margaret Hukee

Gold labeling of two antigens (double labeling) is often done on two section surfaces separated by section thickness. Whether labeling is done on both sides of the same section or on two parallel surfaces separated by section thickness (PSSST), comparable results are dependent on an equal number of epitopes being exposed at each surface. We propose a method to study protein labeling within the same field of proteins, by examining two directly adjacent surfaces that were split during sectioning. The number of labeling sites on adjacent surfaces (AS) were compared to sites on PSSST surfaces in individual bacteria.Since each bacteria needed to be recognizable in all three section surfaces, one-hole grids were used for labeling. One-hole grids require a supporting membrane and excessive handling during labeling often ruptures the membrane. To minimize handling, a labeling chamber was designed that is inexpensive, disposable, minimizes contamination, and uses a minimal amount of solution.


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