Results 1 to 10 of about 203,252 (142)

Wastewater Characterization: Chemical Oxygen Demand or Total Organic Carbon Content Measurement? [PDF]

Molecules
The long time (2 h) required for measurement, expensive chemicals (Ag2SO4), and toxic reagents (K2Cr2O7, HgSO4) limit the application of the standard method for measuring the oxygen equivalent of organic content in wastewater (chemical oxygen demand, COD)
László Wojnárovits, Renáta Homlok, Krisztina Kovács, Anna Tegze, Ezsébet Takács   +4 more
doaj   +4 more sources

Dual-shale-content method for total organic carbon content evaluation from wireline logs in organic shale

Open Geosciences, 2017
Organic shale is one of the most important unconventional resources all around the world. Total organic carbon (TOC) content is an important evaluation parameter of reservoir hydrocarbon source quality.
Nie Xin, Wan Yu, Bie Fan
doaj   +2 more sources

Total organic carbon content logging prediction based on machine learning: A brief review

Energy Geoscience, 2023
The total organic carbon content usually determines the hydrocarbon generation potential of a formation. A higher total organic carbon content often corresponds to a greater possibility of generating large amounts of oil or gas.
Linqi Zhu, Xueqing Zhou, Weinan Liu, Zheng Kong   +3 more
doaj   +2 more sources

Prediction of Total Organic Carbon Content in Shale Based on PCA-PSO-XGBoost

Applied Sciences
Total organic carbon (TOC) content is an important parameter for evaluating the abundance of organic matter in, and the hydrocarbon production capacity, of shale. Currently, no prediction method is applicable to all geological conditions, so exploring an
Yingjie Meng, Chengwu Xu, Tingting Li, Tianyong Liu, Lu Tang, Jinyou Zhang   +5 more
doaj   +2 more sources

Characteristics of soil organic carbon and its components under long-term different crop rotation patterns. [PDF]

PLoS ONE
To clarify the effects of different crop rotation patterns on soil organic carbon content and its components, four treatments were set up: corn continuous cropping, soybean continuous cropping, corn-soybean rotation, and corn-soybean-potato rotation. The
Xingzhe Zhang, Chunguang Liu, Baicheng Wang, Dehai Xu, Xinrui Shi, Shuai Zhang, Bing Yang, Wenhui Wang, Xianghai Meng   +8 more
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Comparative Study on Total Organic Carbon Content Logging Prediction Method Based on Machine Learning

Cejing jishu
The lithology of the first member of the Maokou formation in the Middle Permian of Central Sichuan is complex and the longitudinal variation is large. There are many influencing factors and difficulty in the prediction of total organic carbon content, so
TANG Shengshou, YANG Bin, JIN Jiulong, LIU Hongrui, DAI Xingyu, PU Jincheng   +5 more
doaj   +2 more sources

The impact of long-term application of inorganic nitrogen fertilizers and manure on changes of selected properties of organic matter in sandy loam soil [PDF]

Journal of Central European Agriculture, 2017
The aim of the research was to assess the effect of long-term application of different doses of nitrogen fertilizers with or without manure to changes in the total organic carbon content, total nitrogen content, evaluation of dissolved organic carbon ...
Barbara MURAWSKA, Krystyna KONDRATOWICZ-MACIEJEWSKA, Ewa SPYCHAJ-FABISIAK, Szymon ROZANSKI, Tomasz KNAPOWSKI, Beata RUTKOWSKA   +5 more
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Characteristics and factors influencing soil organic carbon composition by vegetation type in spoil heaps

Frontiers in Plant Science, 2023
IntroductionThe variation of organic carbon content in spoil heaps is closely related to improving soil structure, maintaining soil fertility, and regulating soil carbon cycling balance.
Yiwen Yao, Yiwen Yao, Quanhou Dai, Quanhou Dai, Ruxue Gao, Ruxue Gao, Xingsong Yi, Xingsong Yi, Yong Wang, Yong Wang, Zeyin Hu, Zeyin Hu   +11 more
doaj   +1 more source

Short-term effects of different fertilization measures on water-stable aggregates and carbon and nitrogen of tea garden soil [PDF]

E3S Web of Conferences, 2020
In order to study the effects of different fertilization measures on spring tea soil in Southwest Sichuan, five treatments were set up, including no fertilization (CK), full chemical nitrogen fertilizer (CN), 50% nitrogen fertilizer +30% organic ...
Huang Shengjie, Chen Junpu, Ma Xinpeng, Guo Wentao, Yang Liu, Chen Yi’an, Huang Chengyi   +6 more
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The Characteristics of Organic Carbon in the Offshore Sediments Surrounding the Leizhou Peninsula, China

Frontiers in Earth Science, 2022
A total of 43 seafloor surface sediment samples collected from the offshore region surrounding the Leizhou Peninsula were analyzed in terms of the total organic carbon content (TOC), total nitrogen (TN), organic carbon isotope (δ13Corg) and sediment ...
Jia Xia, Jia Xia, Yongqiang Han, Jingqian Tan, Grace Awinmalsim Abarike, Zhiguang Song   +5 more
doaj   +1 more source