The Hertz Corporation

About: The Hertz Corporation is a based out in . It is known for research contribution in the topics: Population & Soil water. The organization has 9562 authors who have published 11044 publications receiving 447929 citations. The organization is also known as: Hertz Rental Car & Hertz Rent-a-Car.

Solubility of Oxygen in Water

Abstract: THE rate at which self-purification can occur in waters polluted by oxidizable organic matter may depend largely on the rate at which oxygen from the air is dissolved by the water. In natural water the rate of solution is influenced by many variable factors; but Adeney and Becker1 have stated that for constant conditions, and for a uniformly mixed body of water, it is proportional to the difference between the concentration of oxygen in solution and the saturation or equilibrium concentration. Unfortunately, the absolute saturation values are not known with great precision; indeed, some of the values published by several independent investigators differ by as much as 0.4 part of oxygen per million at temperatures in the range 0°–35° C. The most generally accepted values are, however, those quoted by the American Public Health Association in “Standard Methods for Examination of Water and Sewage”2; these are based on gasometric determinations by C. J. J. Fox3.

Kinetic studies in the chemistry of rubber and related materials. III. Thermochemistry and mechanisms of olefin oxidation

Abstract: A new estimate of the O—O bond strength in hydroperoxides is reported, based on a determination of the heats of oxidation of ethyl linoleate and linolenate. This value is employed, together with other known bond strengths and resonance energies, to estimate the heats of a number of alternative oxidation reactions of olefins. By considering the effects of the olefin structure on these heats of reaction, it is possible to see how structural differences can lead to the formation of different oxidation products. The discussion is confined to primary products of the oxidation chain, but, even so, a considerable diversity of behavior is shown to be possible. The final material may include simple monomeric hydroperoxides, polymers with varying amounts of oxygen incorporated in the chain, cyclic peroxides, and scission products. The very limited experimental evidence available falls generally into line with expectation.

Rapid Method for the Estimation of Octanol / Water Partition Coefficient (Log Poct) from Gradient RP-HPLC Retention and a Hydrogen Bond Acidity Term (Sigma alpha2H)

Abstract: We propose a rapid method for the measurement of octanol/water partition coefficients (log P(oct)) via fast gradient reversed phase retention and the calculation of the hydrogen bond acidity of the compounds. The cycle time of the generic gradient HPLC method is 5 minutes. The general solvation equation obtained for the log Poct values and the fast gradient Chromatographic Hydrophobicity Indices with acetonitrile (CHI(ACN)) and methanol

Mosaic diseases of the Cucumber.

Abstract: Summary. Three cucumber mosaic diseases of this country and the causal viruses are described. The first disease, green-mottle mosaic (cucumber virus 3), and the second, yellow mosaic (cucumber virus 4), are not transmissible to solanaceous plants. Cucumber virus 3, on cucumber, causes a dark green mottle with blistering and distortion of the leaves, but the fruit is not usually marked; while cucumber virus 4 gives rise to a distinct type of leaf-mottle, yellow to silver-white in colour, and the fruit may be seriously marked. The third disease, yellow-mottle mosaic (cucumber virus 1), is characterised by a diffuse yellow mottle of cucumber leaves and fruit and is transmissible to solanaceous plants. Cucumber viruses 3 and 4 are described for the first time. Notes are given on fern leaf of tomato, insect vectors and control measures.