Results 11 to 20 of about 2,998 (248)

Nuclear magnetic resonance study of the influence of the liquid nitrogen freeze‐thaw process on the pore structure of anthracite coal

Energy Science & Engineering, 2020
In recent years, liquid nitrogen (LN2) fracturing technology has been applied in coalbed methane (CBM) development. However, the impact of the liquid nitrogen freeze‐thaw process on the pore structure of anthracite coal has not yet been systematically ...
Yapei Chu, Haitao Sun, Dongming Zhang, Guo Yu   +3 more
doaj   +1 more source

3D visualization of hydraulic fractures using micro-seismic monitoring: Methodology and application

Petroleum, 2022
In this paper, a new 3D visualization technical method was developed for hydraulic fractures using micro-seismic monitoring. This technical method consists of four steps: i. interpret the geologic hydraulic fracture model based on seismic source location
Chenghua Ou, Chenggang Liang, Zhaoliang Li, Li Luo, Xiao Yang   +4 more
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The Bacterial Nucleoid: From Electron Microscopy to Polymer Physics—A Personal Recollection

Life, 2023
In the 1960s, electron microscopy did not provide a clear answer regarding the compact or dispersed organization of the bacterial nucleoid. This was due to the necessary preparation steps of fixation and dehydration (for embedding) and freezing (for ...
Conrad L. Woldringh
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Study on the pore evolution law of anthracite coal under liquid nitrogen freeze‐thaw cycles based on infrared thermal imaging and nuclear magnetic resonance

Energy Science & Engineering, 2019
The waterless fracturing method with liquid nitrogen (LN2) as the fracturing fluid has been proposed and successfully applied in coalbed methane (CBM) production in recent years.
Yapei Chu, Dongming Zhang
doaj   +1 more source

Getting a Grip on the Adhesion Mechanism of Epiphytic Orchids – Evidence From Histology and Cryo-Scanning Electron Microscopy

Frontiers in Forests and Global Change, 2021
Plants and animals evolve different attachment structures and strategies for reversible or permanent adhesion to different substrate types. For vascular epiphytes, having the ability to permanently attach to their host plants is essential for ...
Jessica Y. L. Tay, Gerhard Zotz, Gerhard Zotz, Stanislav N. Gorb, Helena J. R. Einzmann   +4 more
doaj   +1 more source

Connectivity of pores in shale reservoirs and its implications for the development of shale gas: A case study of the Lower Silurian Longmaxi Formation in the southern Sichuan Basin

Natural Gas Industry B, 2020
The unconnected gas-bearing pores in shale gas reservoirs may be transformed into “potential recoverable pores” after large scale hydraulic fracturing.
Haijie Zhang, Yuqiang Jiang, Keming Zhou, Yonghong Fu, Zheng Zhong, Xuemei Zhang, Lin Qi, Zhanlei Wang, Zengzheng Jiang   +8 more
doaj   +1 more source

Experimental study on the seepage characteristics of bituminous coal under the conditions of liquid nitrogen fracturing

Energy Science & Engineering, 2019
In coalbed methane (CBM) exploitation, liquid nitrogen (LN2) fracturing has attracted much attention as a promising and effective means to enhance coal seam permeability.
Shuai Chen, Lei Zhang, Cun Zhang, Mengqian Huang   +3 more
doaj   +1 more source

Investigation of Fracture Evolution and Failure Characteristics of Rocks under High-Temperature Liquid Nitrogen Interaction

Geofluids, 2023
The utilization of liquid nitrogen as a sustainable and water-free fracturing medium exhibits immense promise in engineering applications. In this investigation, Brazilian split tests and acoustic emission tests were conducted to explore the impact of ...
Linchao Wang, Yi Xue, Xuyang Shi, Zhihao Zhang, Xue Li, Lin Zhu, Ruifu Liu, Lin Sun, Caifang Wu, Songbao Feng   +9 more
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Factors controlling the mechanical properties degradation and permeability of coal subjected to liquid nitrogen freeze-thaw

Scientific Reports, 2017
Freeze-thaw induced fracturing coal by liquid nitrogen (LN2) injection exerts a significant positive effect on the fracture permeability enhancement of the coal reservoir.
Lei Qin, Cheng Zhai, Shimin Liu, Jizhao Xu   +3 more
doaj   +1 more source

Methods of preparing flower stem samples for scanning electron microscopy

Ornamental Horticulture, 2015
Brazil has great capacity for expansion in the floriculture sector. Studies on postharvest cut flowers contribute to development of the sector, helping to maintain the quality of domestic production.
Poliana Cristina Spricigo, Jéssica Prada Trento, Joana Dias Bresolin, Viviane Faria Soares, Viviane Faria Soares, Luiz Francisco De Mattêo Ferraz, Marcos David Ferreira   +6 more
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