P-Hydroxy-benzoates

Ethy I-p-hydroxy benzoate Cyclohexyl bromide 3-(2 -Methylplperidino)propyl chloride... 

Then, 1.3 ml of glycerine are mixed with 0.5 ml of a 25% solution of methyl p-hydroxy-benzoate in ethanol, and 50 ml of distilled water are added. To the produced mixture are, after sterile filtration, added 10 ml of the stock solution 1, 2.5 ml of the stock solution 2 and 10 ml of the stock solution 3, after which 3.0 ml of sterile 0.1 N sodium hydroxide are added, and the mixture is filled up with sterile distilled water to a volume of 100 ml. The insulin will be precipitated amorphously by the admixture of the sodium hydroxide, and the produced suspension acquires the pH value of 7. It will contain approximately 1 gamma zinc per insulin unit. 

This enzyme [EC 1.14.13.2], also known as p-hydroxy-benzoate hydroxylase, catalyzes the reaction of 4-hydroxy-benzoate, NADPH, and dioxygen to produce proto-catechuate, NADP+, and water. FAD is used as a cofactor by this enzyme. The enzyme from Pseudomonas is very specific for the coenzyme substrate whereas 4-hy-droxybenzoate 3-monooxygenase (NAD(P)H) [EC... 

Ethyl 4-hydroxyben-zoate 4-hydroxyben-zoic acid ehyl ester ethyl p-hydroxy benzoate carboxyphenol Solid... 

Thiourea, methyl p-hydroxy-benzoate, ethyl p-hydroxybenzoate, n-propyl p-hydroxybenzoate, n-butyl p-hydroxybenzoate, propranolol, biphenyl, dibucaine... 

However, recent x-ray studies on p-hydroxybenzoate-p-hydroxybenzoate hydroxylase binary complex crystals clearly show the aromatic substrate is bound at the flavin 4a-5 edge and orthogonal to the isoalloxazine plane (29). Unless this binary complex structure is highly misinformative, it can be inferred that in the 02, p-hydroxy-benzoate, enzyme ternary active complex, oxygen transfer is in the 4a,5 region, not the la, 1 region of the bound FAD, which rules out la-OOH derivatives as important oxygenating intermediates for this enzyme. 

SYNS ASEPTOFORM P BETACIDE P BONOMOLD OP 4-HYDROXYBENZOIC ACID PROPYL ESTER p-HYDROXYBENZOIC ACID PROPYL ESTER NIPASOL p-OXYBENZOESAEUREPRO-PYLESTER (GERMAN) PARABEN PARj SEPT PASEPTOL PRESERVAL P PROPYL p-HYDROXY-BENZOATE n-PROP X p-HYDROXYBENZOATE PROPYLPARABEN (FCC) PROPYLPARASEPT PROTABEN P TEGOSEPT P... 

Because of the importance of longitudinal PLCs -class "alpha" according to (2(5) - in the development of high-modulus materials, a polyester easy to obtain and to modify was chosen as the rigid-rod type PLC component the Jackson and Kuhfuss (15) copolyester based on poly(ethylene terephthalate) (PET) and p-hydroxy-benzoate (PHB). The polyester can be prepared and... 

Sorbates, Benzoates and p-Hydroxy Benzoates (Parabens) Sulphur Dioxide and Sulphites Other Preservatives. 

Moir, C.J. and Eyles, M.J. 1992. Inhibition, injury and inactivation of four psy-chrotrophic foodbome bacteria by the preservatives methyl p-hydroxy-benzoate and potassium sorbate. Journal of Food Protection 55 360-366. 

Husain, M., B. Entsch, D.P. Ballou, V. Massey, and P.J Chapman. 1980. Fluoride elimination from substrates in hydroxylation reactions catalyzed by p-hydroxy-benzoate hydroxylase. /. Biol. Chem. 255 4189-4197. 

Bisphenol-A polycarbonate Poly[2,2 -(m-phenylene)-5,5 -bibenzimidazole] Poly(p-hydroxy benzoate)... 

Poly(p-hydroxy benzoate) 120.11 Poly(vinyl methyl ketone) 70.09... 

P-hydroxy benzoate hydroxylase b) 1.5 xl0-4MTPNH + 3.3 x 10-4M p-hydro-xybenzoate 213 213 ... 

Table 6. Some dimensions in potassium hydrogen di-p-hydroxy-benzoate hydrate...

Crystal salt, white powder. Insol in water. Marketed as suspension preserved with methyl and propyl p-hydroxy-benzoate stable and Fully active for at least one year at room temps. 

Standards methyl, ethyl, propyl and butyl p-hydroxy benzoates, benzo-phenone and diethylphthalate—1000 ppm in methanol. 

Interestingly, bitches in heat (Con/s lupus familiaris) use the same sex pheromone as some swallowtail butterflies methyl p-hydroxy-benzoate. (2)- 7-Dodecenyl acetate is not only a pheromone of more than 100 butterfly and moth species, but also of the female Asian elephant Elephas maxim us). This indicates that pheromones are among to the oldest tools in the evolution of communication. [163]... 

Zachmann et al. [124] have taken advantage of these suggestions, describing not a polymer blend but binary and ternary copolyesters prepared from poly(ethylene-terephthalate), poly (ethylene-naphthalene-2,6-dicarbonoxylate), and poly(p-hydroxy-benzoate). This example is very instructive and clearly shows the practical value of phase diagrams in general and especially of the procedure suggested above. 

Cutting is still used in the production of films from celluloid or poly(tetrafluoroethylene) intermediate forms. Stamping is only used for special parts. Recently, some engineering plastics have been reshaped by forging, for example, ultra-high-molar-mass poly(ethylene) or poly(p-hydroxy benzoate). 

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