Structure Reports for 1953. vol. 17. W. B. Pearson, General Editor. Section Editors: W. B. Pearson (metals), J. Wyart (inorganic compounds), and J. Monteath Robertson (organic compounds). Published for the International Union of Crystallography by Oosthoek's, Utrecht, 1963. viii + 863 pp. Illus. $33.50

Science ◽  
1963 ◽  
Vol 141 (3576) ◽  
pp. 147-147
Author(s):  
A. Pabst
Keyword(s):  
Organic Compounds ◽  
Inorganic Compounds ◽  
International Union ◽  
General Editor

The Mode of Action of Disulfide Accelerators of Vulcanization

1937 ◽  
Vol 10 (1) ◽  
pp. 158-163
Author(s):  
W. Langenbeck ◽  
H. C. Rhiem
Keyword(s):  
Organic Compounds ◽  
Mode Of Action ◽  
Common Knowledge ◽  
Inorganic Compounds ◽  
Technical Problem ◽  
The Other ◽  
Rubber Industry ◽  
Organic Catalysis ◽  
Catalytic Power ◽  
Organic Catalysts

Abstract The catalytic power of organic compounds in general has up to the present time been studied much less extensively than that of inorganic compounds. For about the last ten years, however, the first author has, in collaboration with a number of his students, attempted to fill this gap, though so far efforts have been confined to explaining the mode of action of natural enzymes by means of comparative experiments with organic catalysts. As a result of this work, a theory based on experimental facts has been developed to explain in a satisfactory way the action of enzymes. The other phase of organic catalysis is, strictly speaking, a technical problem. Why for instance should it not be practicable to utilize organic catalysts more extensively than heretofore in industry? If this problem is to be attacked, it seems reasonable to start with the particular industry which already uses organic catalysts to the greatest extent. This is, of course, the rubber industry. The important accomplishments of the chemical industry with respect to the development of vulcanization accelerators is already common knowledge, and the important task at present is not simply to increase the great number of accelerators already known. A problem of more practical value would seem to be to study the mechanism of the acceleration of vulcanization, about which relatively little has been known heretofore.

Some Observations on Taeniid Ovicides: The Effects of Some Organic Compounds and Pesticides on Activity and Hatching

1967 ◽  
Vol 41 (2-3) ◽  
pp. 167-210 ◽  
Author(s):  
A. Mackie ◽  
I. W. Parnell
Keyword(s):  
Organic Compounds ◽  
Inorganic Compounds ◽  
Preliminary Screening ◽  
Insignificant Effect

The results are given of the preliminary screening of many organic compounds and pesticides and of a few inorganic compounds on the eggs of T. hydatigena and T. ovis.Over fifty of these chemicals had little, if any, effect on activity or on hatching, the majority of the others had only an insignificant effect. Moreover, many of the most effective were hindered by the protection of proglottids. Furthermore, some could not be used in practice.

Volatile organic compounds in barite-hosted fluid inclusions from the 3.5 Ga old Dresser Formation, Western Australia

2020 ◽  
Author(s):  
Volker Thiel ◽  
Jan-Peter Duda ◽  
Alfons M. van den Kerkhof ◽  
Joachim Reitner ◽  
Helge Mißbach
Keyword(s):  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Western Australia ◽  
Fluid Inclusions ◽  
Carbon Fixation ◽  
Solid Phase ◽  
Inorganic Compounds ◽  
Wide Range ◽  
Volatile Organic ◽  
Artefact Formation

<p>The c. 3.5 Ga Dresser Formation of the East Pilbara Craton (Western Australia) contains large amounts of blackish barite. These rocks produce an intense sulfidic odor when crushed, resulting from abundant primary fluid inclusions. In part, the black barites are interbedded with sulfidic stromatolites. Using Raman spectroscopy, microthermometry, and two different online GC–MS approaches, we characterized in detail the chemical composition of the barite-hosted fluid inclusions. Our GC–MS techniques were based on (i) thermodecrepitation at 150-250°C and (ii) solid phase microextraction (SPME)–GC–MS at reduced temperature (50°C), thereby minimizing external contamination and artefact formation. Major fluid inclusion classes yielded mainly H<sub>2</sub>O, CO<sub>2</sub>, and H<sub>2</sub>S in varying abundance, along with minor amounts of COS and  CS<sub>2</sub>, N<sub>2</sub>, and CH<sub>4</sub> (< 1%). Notably, we also detected a wide range of volatile organic compounds, including short–chain ketones and aldehydes, thiophenes, and various organic (poly)sulfides. Some of these compounds (CH<sub>3</sub>SH, acetic acid) have previously been invoked as initials agents for carbon fixation under primordial conditions, but up to now their presence had not been observed in Precambrian materials. Based on our findings, we hypothesize that hydrothermal seepage of organic and inorganic compounds during Dresser times provided both, catabolic and anabolic substrates for early microbial metabolisms.</p>

scholarly journals Application of forward osmosis membrane in nanofiltration mode to treat reverse osmosis concentrate from wastewater reclamation plants

2018 ◽  
Vol 77 (8) ◽  
pp. 1990-1997 ◽  
Author(s):  
Shahzad Jamil ◽  
Sanghyun Jeong ◽  
Saravanamuthu Vigneswaran
Keyword(s):  
Reverse Osmosis ◽  
Organic Compounds ◽  
Water Reuse ◽  
Inorganic Compounds ◽  
Forward Osmosis ◽  
Wastewater Reclamation ◽  
Permeate Flux ◽  
Acid Pretreatment ◽  
Inorganic Matter ◽  
Gac Adsorption

Abstract Reverse osmosis concentrate (ROC) from wastewater reclamation plants have high concentrations of organic and inorganic compounds, which have to be removed before its disposal. Forward osmosis (FO) and nanofiltration (NF) membranes were tested to treat the ROC for possible water reuse. This research investigated the combined and individual influence of organic and inorganic matter on the fouling of NF and FO membranes. The results revealed that the NF membrane removed most of the organic compounds and some inorganics. The study further highlighted that the FO membrane at NF mode removed the majority of the inorganic compounds and some organics from the ROC. A pretreatment of granulated activated carbon (GAC) adsorption removed 90% of the organic compounds from ROC. In addition, GAC adsorption and acid pretreatment of ROC improved the net water permeate flux by 17% when an FO membrane was used in the NF system. Acid treatment (by bringing the pH down to 5) helped to remove inorganic ions. Therefore, the resultant permeate can be recycled back to the RO water reclamation plant to improve its efficiency.

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