Beer Digestions for Metal Determination by Atomic Spectrometry and Residual Organic Matter

2004 ◽  
Vol 144 (1-3) ◽  
pp. 183-190 ◽  
Author(s):  
Dolores Bellido-Milla ◽  
Anabel O�ate-Ja�n ◽  
Jose M. Palacios-Santander ◽  
Dolores Palacios-Tejero ◽  
Mar�a P. Hern�ndez-Artiga
Keyword(s):  
Organic Matter ◽  
Atomic Spectrometry ◽  
Metal Determination ◽  
Residual Organic Matter

CHANGES OF MICROPARTICLES AND BACTERIA IN GAPPEI-SYORI JOHKASOU AND RESIDUAL ORGANIC MATTER IN WATER OF THE TREATED WATER TANK

2018 ◽  
Vol 74 (7) ◽  
pp. III_415-III_422
Author(s):  
Yasushi ISHIGURO ◽  
Guangyu CUI ◽  
Tomonari FUJISAWA ◽  
Katsuhito YASUFUKU ◽  
Shinya OKUMURA ◽  
...  
Keyword(s):  
Organic Matter ◽  
Water Tank ◽  
Treated Water ◽  
Residual Organic Matter

The ignition at low temperatures of the organic matter in soils

1938 ◽  
Vol 28 (3) ◽  
pp. 393-400 ◽  
Author(s):  
J. S. Hosking
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Low Temperature ◽  
Low Temperatures ◽  
Carbonaceous Material ◽  
Volatile Constituents ◽  
Final Reaction ◽  
Major Reaction ◽  
Residual Organic Matter

The low temperature ignition of soil organic matter has been investigated for temperatures ranging from 100 to 500° C.Appreciable losses are found to occur below 100° C.; up to 200° C. heating results essentially in the distillation of volatile constituents, while between this temperature and 300° C. destructive distillation is the major reaction. These reactions are responsible for the removal of 85% of the soil organic matter.By 300° C. the greater part of the residual organic matter consists of carbonaceous material, and the final reaction is simple ignition of this material.Two hours’ heating of the soil at 450° C. or about half an hour at 500° C. are recommended for the removal of 99% of the soil organic matter.

Assessment of indigeneity in fossil organic matter: amino acids and stable isotopes

1991 ◽  
Vol 333 (1268) ◽  
pp. 367-374 ◽  
Keyword(s):  
Amino Acids ◽  
Stable Isotopes ◽  
Organic Matter ◽  
New Technologies ◽  
Trophic Position ◽  
Stable Carbon Isotope ◽  
Nitrogen Isotope ◽  
Alternative Methods ◽  
Stable Carbon ◽  
Residual Organic Matter

Whereas the presence of amino acids in fossil materials is clearly related to biosynthesis, an indigenous relationship with the fossil may be suspect. At present, attempts to establish the indigeneity of amino acids in fossils are based on distribution and stereochemistry. However, fossil systems are not closed and racemization may be retarded in organic materials within a fossil matrix. The advent of new technologies has resulted in alternative methods for evaluating the authenticity of fossil organic matter. A comparison of the stable carbon isotope compositions of the D- and L-enantiomers of individual amino acids facilitates the evaluation of indigeneity. Here we report the application of this method for determining the origin(s) of amino acids in fossils and extraterrestrial samples. Further, nitrogen isotope compositions of fossil materials should reflect trophic order, with increasing enrichment in 515N with progression up the food chain. Establishment of the trophic position of a fossil would further reinforce the appraisal of indigeneity based on the isotopic composition of its residual organic matter. Results of initial studies on Cretaceous age vertebrates which are consistent with the suggested feeding morphologies of these organisms are also presented.

A comparison of the mineralization of nitrogen and of sulphur from decomposing organic materials

1960 ◽  
Vol 11 (6) ◽  
pp. 960 ◽  
Author(s):  
NJ Barrow
Keyword(s):  
Carbon Dioxide ◽  
Organic Matter ◽  
Nitrate Nitrogen ◽  
Inorganic Nitrogen ◽  
Plant Materials ◽  
Wide Range ◽  
Sulphate Sulphur ◽  
Microbial Residues ◽  
Residual Organic Matter ◽  
Native Organic Matter

The decomposition of a wide range of plant materials added to soil waa studied by measuring the production of carbon dioxide, and changes in the concentrations of ammonium and nitrate nitrogen and sulphate sulphur. The amount of sulphur mineralized depended on the sulphur content and the carbon/sulphur (C/S) ratio of the organic matter in much the same way as the amount of inorganic nitrogen depended on the nitrogen content and the carbon/nitrogen (C/N) ratio. For any given C/S or C/N ratio the sulphur or nitrogen mineralized varied within quite wide limits. With a 12 week decomposition period, initial C/S ratios of 200 and 420 were the minimum and maximum values at which no mineralization of sulphur occurred. The corresponding values for nitrogen were 16 and 44. Calculations indicated that the microbial residues from easily decomposed materials had a C/N ratio of 6–7 and a C/S ratio of 50–60, but with the residual organic matter from the more resistant materials the ratios were wider. Where large quantities of nitrogen were mineralized the decomposition of the native organic matter was stimulated.

Fabrication of attapulgite/carbon composites from spent bleaching earth for the efficient adsorption of methylene blue

RSC Advances ◽  
2015 ◽  
Vol 5 (48) ◽  
pp. 38443-38451 ◽  
Author(s):  
Jie Tang ◽  
Bin Mu ◽  
Li Zong ◽  
Maosong Zheng ◽  
Aiqin Wang
Keyword(s):  
Methylene Blue ◽  
Organic Matter ◽  
Low Cost ◽  
Bleaching Earth ◽  
Carbon Composites ◽  
Carbon Precursor ◽  
One Dimensional ◽  
One Step ◽  
Available Carbon ◽  
Residual Organic Matter

In this work, one-dimensional attapulgite/carbon composites were prepared by a one-step carbonization process using the residual organic matter of spent bleaching earth as a low-cost available carbon precursor.

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