scholarly journals Solubility of potassium benzoate and homoassociation of benzoic acid in acetone containing 5 mole percent DMSO

2017 ◽  
Author(s):  
S.T. Goga ◽  
Yu.V. Kholin ◽  
N.V. Efimova* ◽  
Yu.V. Isaenko ◽  
N.O. Mchedlov-Petrosyan
Keyword(s):  
Benzoic Acid ◽  
Mole Percent ◽  
Potassium Benzoate

scholarly journals Levels of Benzoic and Sorbic Acid Preservatives in Commercially Produced Ready to Serve Products in Sri Lanka

2019 ◽  
Vol 3 (2) ◽  
Keyword(s):  
Sri Lanka ◽  
Benzoic Acid ◽  
High Performance ◽  
Sorbic Acid ◽  
Reversed Phase ◽  
Food Preservation ◽  
Acetate Solution ◽  
Food Standards ◽  
Potassium Benzoate

Benzoic acid, sorbic acid are widely used for food preservation. The analyses of these preservatives in 100 different food products were performed. Therefore 100 samples including, 10 carbonated beverages, 20 jams, 10 jelly drinks, 10 jelly cups, 30 ready to serve drinks, 10 nectars, and 10 sauces were analysed by using high performance liquid chromatography. The HPLC determination of the preservatives was performed using a reversed – phase C18 column and UV detection at 235 nm. Flow rate approximately 1.2ml/min. Eluent for HPLC, mix 50 volume parts of Ammonium Acetate solution with 40 volume parts of methanol for HPLC and adjust to a pH of 4.5 to 4.6 with acetic acid. The preservative concentration in samples was used as external standards for sodium benzoate and potassium benzoate. Levels were compared with Food Act and Food Standards Regulation in Sri Lanka. Both benzoic acid and sorbic acid were detected in a range of 1120ppm to 30ppm and 582ppm to 16ppm respectively. Although 65% of the samples was not compliant with the Food Act and Food Regulations in Sri Lanka.

TEM characterization of proton-exchanged LiNbO3 optical waveguides

1986 ◽  
Vol 44 ◽  
pp. 480-481
Author(s):  
W. E. Lee
Keyword(s):  
Refractive Index ◽  
Benzoic Acid ◽  
Optical Waveguides ◽  
Total Internal Reflection ◽  
Index Of Refraction ◽  
Optical Measurements ◽  
Lithium Ions ◽  
Wide Channel ◽  
Tem Characterization

An optical waveguide consists of a several-micron wide channel with a slightly different index of refraction than the host substrate; light can be trapped in the channel by total internal reflection.Optical waveguides can be formed from single-crystal LiNbO3 using the proton exhange technique. In this technique, polished specimens are masked with polycrystal1ine chromium in such a way as to leave 3-13 μm wide channels. These are held in benzoic acid at 249°C for 5 minutes allowing protons to exchange for lithium ions within the channels causing an increase in the refractive index of the channel and creating the waveguide. Unfortunately, optical measurements often reveal a loss in waveguiding ability up to several weeks after exchange.

Bjerkandera adusta as a source of benzoic acid derivatives targeting 26S proteasome and cathepsins B&L

2019 ◽  
Author(s):  
K Georgousaki ◽  
N Tsafantakis ◽  
S Gumeni ◽  
V González-Menéndez ◽  
G Lambrinidis ◽  
...  
Keyword(s):  
Benzoic Acid ◽  
26S Proteasome ◽  
Bjerkandera Adusta ◽  
Benzoic Acid Derivatives
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