A color standard for PH determination using a natural indicator by Alarcon, Adelaida F.

Hydrocracking and hydrotreating

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Energy the solar hydrogen alternative by Bockris, John O'M

The effect of pH on the coupling reaction of histidine with p-diazobenzenesulfonic acid [microform] by Benitez, Lita V. 1939-

The hydrogenation of vegetable oils and the production of vegetable ghee. by Patterson, H. B. W. (Henry Basil Wilberforce)

Hydrogen energy : a bibliography with abstracts

Buffers for pH and metal ion control by Perrin, D. D. (Douglas Dalzell) 1922-

The effect of hydrogen-ion concentration (pH value) on the stability and acceptability of dyed candied pomelo (Citrus maxima, Burm.) peelings [microform] by Abdon, Teresita Quiaoit 1938-

The effect of hydrogen-ion concentration (pH value) on the stability and acceptability of dyed candied pomelo (Citrus maxima, Burm.) peelings by Abdon, Teresita Quiaoit

Fourth conference on catalytic hydrogenation and analogous pressure reactions [papers]