Results 31 to 40 of about 177,361 (268)

Transient electromagnetic detection and numerical simulation analysis of the deformation characteristics of an old goaf in an alpine coal mine area

Frontiers in Earth Science, 2023
In this paper, Qinghai alpine mining area is taken as the research object to explore the deformation characteristics of overlying strata in alpine mining area, so as to prevent geological disasters caused by over-exploitation in alpine mining area.
Zhan-Xi Wei, Jian-Hui Dong, Jian-Hui Dong, Meng Zhao, Fei-Hong Xie, Ying-Jun Li, Ying-Jun Li, Ying-Jun Li, Lin Feng   +8 more
doaj   +1 more source

Water‐Compatible SuFEx‐Active Diazonium Linchpin Platform for Rapid Modular Diversification and On‐DNA Functionalization

Advanced Functional Materials, EarlyView.
Sulfur fluoride exchange (SuFEx) is a powerful click platform, yet water‐compatible multifunctional linchpins remain elusive. Here, we report decagram‐scalable diazonium linchpins that enable rapid Pd‐catalyzed diversification and direct, catalyst‐free on‐DNA ligation in aqueous media.
Seok Ju Hong, Dong Hyeon Kim, Yujin Lim, Yongseok Kwon, Sangkyu Lee, Han Yong Bae   +5 more
wiley   +1 more source

Study of the effect of iodine on the optical properties of unsaturated poly Styrene (PS) [PDF]

مجلة التربية والعلم, 2012
In this work, the effect of iodine (I) impurities on the optical properties of (PS) thin films studied, which prepared by spin coating method on glass Substrates with thickness (40,50,60)µm at room temperature.
Zahra Dabbagh
doaj   +1 more source

Detection of former goaf and analysis of deformation characteristics of overburden in Dameidong coal mine

Frontiers in Earth Science, 2023
In order to analyze the deformation of the old goaf in Dameidong Coal Mine and its influence on the surrounding rock and soil layer, it provides guidance for the prevention and control of geological disasters in the region.
Zhan-Xi Wei, Zhan-Xi Wei, Zhan-Xi Wei, Meng Zhao, Fei-Hong Xie, Sheng-Hong Cao, Sheng-Hong Cao, Sheng-Hong Cao, Jian-Hui Dong, Yang-Dan Dong   +9 more
doaj   +1 more source

Giant Magnetic Coercivity Driven by Spin‐Bag Ferromagnetism in Epitaxial Sr3YCo4O10+δ Films with Engineered 2D Oxygen Vacancy Ordering

Advanced Functional Materials, EarlyView.
A giant magnetic coercivity and a vertical shift of hysteresis loops are demonstrated in Sr3YCo4O10+δ epitaxial films. The hard magnetic behavior originates from ferromagnetic spin bags stabilized within a long‐range ordered oxygen‐vacancy structure.
Yanbin Chen, Roger Guzman, Xiaomin Jia, Jialu Wu, Xing Xu, Li Sun, Jinbo Pan, Shixuan Du, Myung‐Hwan Whangbo, Wu Zhou, Jing Ma, Ce‐wen Nan, Chonglin Chen   +12 more
wiley   +1 more source

Unsaturated fatty acids [PDF]

Proceedings of the Nutrition Society, 1999
There is good scientific evidence that dietary fatty acid composition is involved in the aetiology of many diseases. Increasing the supply of n−3 polyunsaturated fatty acids (PUFA) may reduce the risk of CHD. Several scientific organizations (for example, see Department of Health, 1991, 1994; British Nutrition Foundation, 1992; Scientific Committee for
openaire   +2 more sources

A Novel Modified Petroresin Particle (MPRP) With Enhanced Oil–Water Selectivity for Cold Production in Heavy Oil Reservoirs

Advanced Functional Materials, EarlyView.
A novel oil–water selective conformance control agent, MPRP, is prepared via hydrophilic grafting and mechanical granulation. MPRP uniformly disperses in water, cohesively expands upon aging, and readily dissolves in the oil phase. During conformance control, it selectively aggregates in water channeling pathways to form effective plugs without ...
Guang Zhao, Dongfang Lv, Chang Liu, Changxu Wu, Yifei Liu, Caili Dai, Huazhou Li   +6 more
wiley   +1 more source

Kinematic diffusion approach to describe recharge phenomena in unsaturated fractured chalk

Journal of Hydrology and Hydromechanics, 2017
When dealing with groundwater resources, a better knowledge of the hydrological processes governing flow in the unsaturated zone would improve the assessment of the natural aquifer recharge and its vulnerability to contamination.
Pastore Nicola, Cherubini Claudia, Giasi Concetta I.   +2 more
doaj   +1 more source

Bismuth‐Based Photocatalysts for Water Remediation: Design Strategies, Mechanisms, and Challenges

Advanced Functional Materials, EarlyView.
This review highlights representative design strategies for bismuth‐based semiconductor photocatalysts in solar‐driven water purification. Emphasis is placed on electronic structure regulation, oxygen‐vacancy engineering, and interfacial coupling to enable efficient full‐spectrum light utilization, improved charge separation, and selective oxidation in
Shan Liu, Yi Zhao, Liming Cai, Simin Long, Jing Kang, Jingkai Lin, Jimin Shen, Zhonglin Chen, Shaobin Wang, Huayang Zhang   +9 more
wiley   +1 more source

Contractancy and shear behavior of extremely loose structure soils with particle breakage in saturated and unsaturated conditions [PDF]

E3S Web of Conferences
Pumices with high pore voids of volcanic origin are distributed throughout Japan and are the causal layer of slope failures. In many cases of surface failures, it is difficult to assume that the resulting layers are fully saturated. The high waterholding
Sato Itsuki, Kuwano Reiko, Otsubo Masahide   +2 more
doaj   +1 more source