The nitrogen cycle in shallow water sediment systems of rice fields Part II: Fractionation and bio-availability of organic nitrogen compounds

Hydrobiologia ◽  
1988 ◽  
Vol 159 (2) ◽  
pp. 203-210 ◽  
Author(s):  
Carlos Bonetto ◽  
F. Minzoni ◽  
H. L. Golterman
Keyword(s):  
Shallow Water ◽  
Nitrogen Cycle ◽  
Organic Nitrogen ◽  
Rice Fields ◽  
Nitrogen Compounds ◽  
Shallow Water Sediment

Utilization of organic nitrogen compounds by yeasts of the genusSaccharomyces

1968 ◽  
Vol 34 (1) ◽  
pp. 153-158 ◽  
Author(s):  
T. A. LaRue ◽  
J. F. T. Spencer
Keyword(s):  
Organic Nitrogen ◽  
Nitrogen Compounds

scholarly journals Modeling Nitrogen Decrease in Water Lettuce Ponds from Waste Stabilization Ponds

2018 ◽  
Vol 31 ◽  
pp. 04004
Author(s):  
Gitta Agnes Putri ◽  
Sunarsih
Keyword(s):  
Organic Nitrogen ◽  
Nitrogen Transformation ◽  
Rate Of Change ◽  
Nitrogen Compounds ◽  
Water Lettuce ◽  
Waste Stabilization Ponds ◽  
Stabilization Ponds ◽  
Waste Stabilization ◽  
Bacterial Uptake ◽  
Nitrate And Nitrite

This paper presents about the dynamic modeling of the Water Lettuce ponds as a form of improvement from the Water Hyacinth ponds. The purpose of this paper is to predict nitrogen decrease and nitrogen transformation in Water Lettuce ponds integrated with Waste Stabilization Ponds. The model consists of 4 mass balances, namely Dissolved Organic Nitrogen (DON), Particulate Organic Nitrogen (PON), ammonium (NH4+), Nitrate and Nitrite (NOx). The process of nitrogen transformation which considered in a Water Lettuce ponds, namely hydrolysis, mineralization, nitrification, denitrification, plant and bacterial uptake processes. Numerical simulations are performed by giving the values of parameters and the initial values of nitrogen compounds based on a review of previous studies. Numerical results show that the rate of change in the concentration of nitrogen compounds in the integration ponds of waste stabilization and water lettuce decreases and reaches stable at different times.

scholarly journals Analysis of the chemical composition of organic aerosol at the Mt. Sonnblick observatory using a novel high mass resolution thermal-desorption proton-transfer-reaction mass-spectrometer (hr-TD-PTR-MS)

2010 ◽  
Vol 10 (6) ◽  
pp. 13969-14011 ◽  
Author(s):  
R. Holzinger ◽  
A. Kasper-Giebl ◽  
M. Staudinger ◽  
G. Schauer ◽  
T. Röckmann
Keyword(s):  
Proton Transfer ◽  
Mass Spectrometer ◽  
Thermal Desorption ◽  
Organic Nitrogen ◽  
Transfer Reaction ◽  
Proton Transfer Reaction ◽  
Reaction Mass ◽  
High Mass ◽  
Nitrogen Compounds ◽  
High Mass Resolution

Abstract. For the first time a high mass resolution thermal desorption proton transfer reaction mass spectrometer (hr-TD-PTR-MS) was deployed in the field to analyze the composition of the organic fraction of aerosols. We report on measurements from the remote Mt. Sonnblick observatory in the Austrian alps (3108 m a.s.l.) during a 7 week period in summer 2009. A total of 638 mass peaks in the range 18–392 Da were detected and quantified in aerosols. An empirical formula was tentatively attributed to 464 of these compounds by custom-made data analysis routines which consider compounds containing C, H, O, N, and S atoms. Most of the other (unidentified) compounds must contain other elements – most likely halogenated compounds. The mean total concentration of all detected compounds was 1.1 μg m−3. Oxygenated hydrocarbons constitute the bulk of the aerosol mass (75%) followed by organic nitrogen compounds (9%), inorganic compounds (mostly NH3, 8%), unidentified/halogenated (3.8%), hydrocarbons (2.7%), and organic sulfur compounds (0.8%). The measured O/C ratios are lower than expected and suggest a significant effect from charring. A significant part of the organic nitrogen compounds is non volatile. Organic carbon concentrations measured with TD-PTR-MS were about 25% lower than measurements on high volume filter samples.

scholarly journals The Influence of the Organic Matter of Sewage Sediments on Biological Activity of Microorganisms which Carry Out the Transformations of Carbon and Nitrogen Compounds

2013 ◽  
Vol 62 (4) ◽  
pp. 445-452
Author(s):  
IZABELLA PISAREK ◽  
KATARZYNA GRATA
Keyword(s):  
Organic Matter ◽  
Biological Activity ◽  
Organic Nitrogen ◽  
Soil Microorganisms ◽  
Natural Habitat ◽  
Transformation Process ◽  
Nitrogen Compounds ◽  
Soil Environment ◽  
Carbon And Nitrogen ◽  
Cellulolytic Microorganisms

Soil microorganisms play an important role in the organic matter transformation process. The soil microorganisms also are in symbiotic relationship with plants. At the same time, soil microorganisms are sensitive to both anthropogenic and natural habitat changes. Particular characteristics of organic matter (the C:N relation, pH, the content the content of assimilated nutrients, the xenobiotics etc.) modify the biotic conditions of the soils. This particularly concerns the microorganisms which carry out the changes in the mineral and organic nitrogen compounds and the transformation of the external organic matter. The first aim of this work was to assess the influence of the sewage sediments and the manure on the phytosanitary potential of the soil environment. The second aim of this article was to estimate the number and activity of microorganisms which carry out the transformation of carbon and nitrogen compounds. This work showed the stimulating effect of the external organic matter both on the number and on the activity of most of the physiological groups. The manure mainly stimulated ammonificators, amylolitic microorganisms and Azotobacter sp. The sewage sediments mainly stimulated ammonificators, nitrifiers of I phase and cellulolytic microorganisms. The statistically significant impact of the physio-chemical soil habitat on the biological activity of the analyzed groups of microbes was also noted.

The autotrophic nutrition of symbiotic marine coelenterates with special reference to hermatypic corals. I. Movement of photosynthetic products between the symbionts

1971 ◽  
Vol 178 (1050) ◽  
pp. 111-129 ◽  
Keyword(s):  
Amino Acids ◽  
Organic Nitrogen ◽  
Sea Water ◽  
Nitrogen Compounds ◽  
Organic Substances ◽  
Low Concentrations ◽  
Steady Rate ◽  
Hermatypic Corals ◽  
Photosynthetic Products ◽  
Related Compounds

When symbiotic coelenterates, especially hermatypic corals, were incubated in the light in sea water containing NaH 14 CO 3 , small quantities of fixed 14 C were released from the tissues at a steady rate over 4 h. The rate of release was greatly increased in the presence of glycerol, glucose and alanine; the additional 14 C released was in the same substance as that added to the medium. The following related compounds had little or no effect on 14 C release : ethylene glycol, sorbose, fructose, glucosamine, glycine, proline, serine and glutamic acid. Such results have been previously reported in other symbiotic systems, and the substances causing the specific release of fixed 14 C are believed to be those which move from the autotrophic to the heterotrophic symbiont. This belief is supported here by previous observations that glycerol, glucose and alanine are among the most important organic substances released by freshly isolated zooxanthellae. Ammonium chloride increased the amount of fixed 14 C released by corals into alanine media, possibly due to conversion of ammonia to amino acids by zooxanthellae. Appreciable release of 14 C fixed in the dark also occurred into alanine solutions. These results suggest possible roles of zooxanthellae in supplying organic nitrogen compounds to the host cell at night as well as during the day. The involvement of zooxanthellae in ‘recycling’ nitrogen compounds within the association may help to explain the success of corals in seas poor in nutrients. There was substantial utilization of external glycerol and glucose when supplied at either high or low concentrations. Corals may well be able to utilize some of the small amounts of organic matter dissolved in sea water in the natural environment.

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