Dear Theint theint Win

Pls. find the attached files, may help in your research, good luck

http://microbeonline.com/voges-proskauer-test-principle-procedure-results/

http://www.sciencedirect.com/science/article/pii/S156673670700324X

https://en.wikipedia.org/wiki/Glucose_phosphate_broth

https://en.wikipedia.org/wiki/Voges%E2%80%93Proskauer_test

https://tools.thermofisher.com/content/sfs/manuals/IFU21200.pdf

https://catalog.hardydiagnostics.com/cp_prod/Content/hugo/MR-VPBroth.htm

http://www.sciencedirect.com/science/article/pii/S1026309811000708

http://link.springer.com/article/10.1007/BF00326609

https://www.sigmaaldrich.com/content/dam/sigma-aldrich/docs/Sigma/General_Information/1/90.pdf

https://www.bd.com/europe/regulatory/Assets/IFU/Difco_BBL/211383.pdf

http://www.microbiologyinfo.com/voges-proskauer-vp-test-principle-reagents-procedure-and-result/

https://en.wikipedia.org/wiki/1-Naphthol

Regards

Prof. Houda Kawas