COMPARISON OF 13C CPMAS NMR AND CHEMICAL TECHNIQUES FOR MEASURING THE DEGREE OF DECOMPOSITION IN VIRGIN AND CULTIVATED PEAT PROFILES

1987 ◽  
Vol 67 (1) ◽  
pp. 187-198 ◽  
Author(s):  
C.M. PRESTON ◽  
S.-E. SHIPITALO ◽  
R. L. DUDLEY ◽  
C. A. FYFE ◽  
S. P. MATHUR ◽  
...  
Keyword(s):  
Organic Soils ◽  
13C Cpmas Nmr ◽  
Chemical Changes ◽  
Chemical Effects ◽  
Peat Profile ◽  
Plough Layer ◽  
Size Diminution ◽  
Physical Changes ◽  
Natural Decomposition ◽  
C Nmr

Solid-state 13C CPMAS NMR was used to examine organic soils from virgin, 5-yr and 15-yr cultivated sites. In agreement with previous studies using other techniques, the chemical effects of cultivation were essentially confined to the plough layer. Cultivated sites had less carbohydrate, and increased lipid and methoxyl carbon; these changes were similar to those found with depth, due to natural decomposition. Changes in aromatic and phenolic carbon with depth or years of cultivation were small. When the NMR data were compared with other indicators of decomposition, there were no correlations between the pyrophosphate index and NMR parameters. Rubbed fiber correlated positively with carbohydrate, and negatively with lipid. This study supports the use of rubbed fiber as a routine indicator of the degree of decomposition, and the use of 13C CPMAS NMR for elucidating chemical changes in organic soils. It also illustrates the need to separate more clearly chemical changes occurring during decomposition or cultivation, from purely physical changes due to drying, compaction, and particle size diminution. Key words: 13C NMR, degree of composition, peat profile, organic soils

Explaining trajectories of chemical changes during decomposition of tropical litter by 13C-CPMAS NMR, proximate and nutrients analysis

2018 ◽  
Vol 436 (1-2) ◽  
pp. 13-28 ◽  
Author(s):  
Tushar C. Sarker ◽  
Giulia Maisto ◽  
Anna De Marco ◽  
Francesco Esposito ◽  
Speranza C. Panico ◽  
...  
Keyword(s):  
13C Cpmas Nmr ◽  
Chemical Changes

scholarly journals Effect of Carbonized Tangerines Prepared Using Plasma as Fertilizer: Case Study—Lettuce Farming

2021 ◽  
Vol 14 (1) ◽  
pp. 243
Author(s):  
Soo-Young Moon ◽  
Hyeon Soo Kim ◽  
Daehee Jang ◽  
Ji-Young Lee
Keyword(s):  
Good Alternative ◽  
Leaf Length ◽  
Growth Characteristics ◽  
Untreated Plot ◽  
Chemical Changes ◽  
Before And After ◽  
Length Width ◽  
Physical Changes ◽  
By Products

This study investigates the soil chemical changes and crop growth characteristics after treatment with carbonized tangerines prepared using plasma. To determine the effect of the carbonized tangerines on crop, four test plots were treated with chaff charcoal or different ratios of coco peat and carbonized tangerines. Lettuce was grown on the plots, and the chemical changes in soil and physical changes in the lettuce were observed. Chemical changes in the soil before and after the carbonized tangerine treatments were very similar to those before and after chaff charcoal treatment. Lettuce leaf length, width, weight, and count in carbonized tangerine-treated plots significantly increased than those in the untreated plot. Our results found that the carbonization of tangerines using plasma can be a good alternative for processing many by-products generated during cultivation. In addition, the possibility of using carbonized tangerines as biochar has been explored.

scholarly journals Cigarette Butt Decomposition and Associated Chemical Changes Assessed by 13C CPMAS NMR

PLoS ONE ◽  
2015 ◽  
Vol 10 (1) ◽  
pp. e0117393 ◽  
Author(s):  
Giuliano Bonanomi ◽  
Guido Incerti ◽  
Gaspare Cesarano ◽  
Salvatore A. Gaglione ◽  
Virginia Lanzotti
Keyword(s):  
13C Cpmas Nmr ◽  
Chemical Changes ◽  
Cigarette Butt

THE ESTABLISHMENT OF SYNCHRONY BETWEEN SUBSURFACE LAYERS AND ESTIMATION OF OVERALL SUBSIDENCE OF CULTIVATED ORGANIC SOILS BY A PALYNOLOGICAL METHOD

1982 ◽  
Vol 62 (2) ◽  
pp. 427-431 ◽  
Author(s):  
S. P. MATHUR ◽  
M. P. LÉVESQUE ◽  
P. J. H. RICHARD
Keyword(s):  
Bimodal Distribution ◽  
Organic Soil ◽  
Tsuga Canadensis ◽  
Organic Soils ◽  
Soil Profiles ◽  
Subsurface Layers ◽  
Physical Changes ◽  
Cultivated Soils

Pollen profiles of Tsuga canadensis in a virgin and two cultivated areas of a bog revealed the bimodal distribution characterized by easily recognizable minima, thus establishing synchrony between specific layers of the three organic soil profiles. This knowledge allowed estimation of overall subsidence of the cultivated soils, and would facilitate comparisons between subsurface layers now determinable as synchronous. Such comparisons should help determine the extent and depth of temporal biochemical and physical changes in subsurface layers of cultivated organic soils.

scholarly journals SAMANYA SHODHANA OF RAW VANGA BY DHALANA METHOD WITH SPECIAL REFERENCE TO RASTARANGINI: PHARMACEUTICO-ANALYTICAL STUDY FROM ASHVIN RURAL AYURVED COLLEGE, MANCHIHILL, SANGAMNER, MAHARASHTRA

2020 ◽  
Vol 8 (7) ◽  
pp. 3886-3889
Author(s):  
Supriya A. Giri ◽  
Ravindra Atram ◽  
Smita Kolte ◽  
Sanjeev Lokhande
Keyword(s):  
Special Reference ◽  
Analytical Study ◽  
Chemical Change ◽  
Chemical Changes ◽  
Physical Chemical ◽  
Before And After ◽  
Physical Changes

Background: Shodhana is a process which separate mala by doing Peshana, Khalana, Mardana, Dhala-na, Nirvapana, Swedhana etc. Objective: To study the physical, chemical changes in raw Vanga before and after Samanya Shodhana. Materials & Methods: In the present study, Vanga Shodhana is carried out by Dhalana method in different media as Taila, Takra, Gomutra, Aranala, Kulattha Kwatha for 7 times. Results and Conclusions: Physical changes take place in metal useful for further process. Removal of zinc and lead from the raw Vanga shows the importance of Malavicchedana property of Shodhana. Vanga un-dergoes the oxidation as a chemical change which quickens the further process of Jarana and Marana

Climate Change Impacts on Surface Water Quality

2017 ◽  
pp. 322-340 ◽  
Author(s):  
Never Mujere ◽  
William Moyce
Keyword(s):  
Climate Change ◽  
Water Quality ◽  
Water Discharge ◽  
Surface Water Quality ◽  
Climate Change Impacts ◽  
Nutrient Concentrations ◽  
Chemical Changes ◽  
Physical Changes ◽  
Physical And Chemical ◽  
Impacts Of Climate Change

Climate change affects water resources through changes in evaporation, groundwater recharge, temperature, runoff and rainfall. Such changes affect the mobilization of nutrients, distribution and mobility of pollutants in freshwater systems. The direct and indirect climate change impacts on water quality comprise biological, physical and chemical changes. Biological changes include pathogenic microbes in water. Physical changes include increased water temperature, reduced river and lake ice cover, more stable vertical stratification and less mixing of water of deep-water lakes, and changes in water discharge, affecting water level and retention time. Chemical changes include increased nutrient concentrations, water color and decreased oxygen content. However, few scientific works have been recently published on the impacts of climate change on water quality modification. This chapter fills a real gap because there has been no comprehensive review on climate change and river water quality to date. It focuses on the expected water quality impacts of climate change.

Climate Change Impacts on Surface Water Quality

2017 ◽  
pp. 97-115
Author(s):  
Never Mujere ◽  
William Moyce
Keyword(s):  
Climate Change ◽  
Water Quality ◽  
Water Discharge ◽  
Surface Water Quality ◽  
Climate Change Impacts ◽  
Nutrient Concentrations ◽  
Chemical Changes ◽  
Physical Changes ◽  
Physical And Chemical ◽  
Impacts Of Climate Change

Climate change affects water resources through changes in evaporation, groundwater recharge, temperature, runoff and rainfall. Such changes affect the mobilization of nutrients, distribution and mobility of pollutants in freshwater systems. The direct and indirect climate change impacts on water quality comprise biological, physical and chemical changes. Biological changes include pathogenic microbes in water. Physical changes include increased water temperature, reduced river and lake ice cover, more stable vertical stratification and less mixing of water of deep-water lakes, and changes in water discharge, affecting water level and retention time. Chemical changes include increased nutrient concentrations, water color and decreased oxygen content. However, few scientific works have been recently published on the impacts of climate change on water quality modification. This chapter fills a real gap because there has been no comprehensive review on climate change and river water quality to date. It focuses on the expected water quality impacts of climate change.

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