Results 21 to 30 of about 177,741 (266)

Geochemical characteristics of hydrogen, oxygen, carbon isotopes and REE of cenozoic dolomites in Well Xike 1, Xisha Islands, South China sea and the significance for dolomitization in island-reef areas

Frontiers in Earth Science, 2023
Due to the special tectonic background and complex geological evolution characteristics of the South China Sea, reef dolomite reservoirs (sush as Well Xike 1) are widely developed.
Xiaoyu Li, Xiaoyu Li, Zhiqiang Shi, Lu Han, Xiaolong Hu   +4 more
doaj   +1 more source

Absolute isotope ratios defining isotope scales used in isotope ratio mass spectrometers and optical isotope instruments [PDF]

Rapid Communications in Mass Spectrometry, 2020
Rationale The isotope delta is calculated from the isotope ratio of a sample and the absolute isotope ratio of the zero reference point defining each stable isotope international scale ( R std ). Therefore,
Grzegorz Skrzypek, Philip J. H. Dunn
openaire   +2 more sources

Contrasting Centennial‐Scale Climate Variability in High Mountain Asia Revealed by a Tree‐Ring Oxygen Isotope Record From Lahaul‐Spiti

Geophysical Research Letters, 2020
Glacier response analyses in High Mountain Asia have revealed that the glaciers from the Karakoram region were in balance or thickening while most from the other regions were thinning, the “Karakoram anomaly.” It is, however, not clear whether this ...
Shreyas Managave, P. Shimla, Ram R. Yadav, R. Ramesh, S. Balakrishnan   +4 more
doaj   +1 more source

Inhibition of cardiac PERK signaling promotes peripartum cardiac dysfunction

Scientific Reports, 2021
Peripartum cardiomyopathy (PPCM) is a life-threatening heart failure occurring in the peripartum period. Although mal-angiogenesis, induced by the 16-kDa N-terminal prolactin fragment (16 K PRL), is involved in the pathogenesis, the effect of full-length
Takashi Shimizu, Akashi Taguchi, Yoshiki Higashijima, Yasuharu Kanki, Ryo Nakaki, Yoshihiro Urade, Youichiro Wada   +6 more
doaj   +1 more source

Simplified bacterial denitrification method using Stenotrophomonas nitritireducens for nitrite dual isotope analysis in low-concentration environmental samples

Frontiers in Environmental Science
This study presents a simplified and optimized bacterial denitrification method using Stenotrophomonas nitritireducens for precise nitrite isotope analysis in low-concentration environmental samples.
Sushmita Deb, Dominika Lewicka-Szczebak
doaj   +1 more source

ISOTOPIC CONVERGENCE THEOREM [PDF]

Journal of Knot Theory and Its Ramifications, 2013
When approximating a space curve, it is natural to consider whether the knot type of the original curve is preserved in the approximant. This preservation is of strong contemporary interest in computer graphics and visualization. We establish a criterion to preserve knot type under approximation that relies upon pointwise convergence and convergence in
Li, Ji, Peters, Thomas J.
openaire   +3 more sources

Identification of karst water inflow sources in the main shaft of Lianhuashan, Jingxiang phosphate mine, Hubei Province

Shuiwen dizhi gongcheng dizhi
Karst mining areas are characterized by pronounced heterogeneity due to extensive karst development, making them particularly susceptible to water inrush and groundwater contamination during deep extension mining.
Si XU, Yang YU, Peipei LIAO, Zuxu CAI, Jiaqianlin LIU, Yanmei CHEN   +5 more
doaj   +1 more source

Author Correction: PERK participates in cardiac valve development via fatty acid oxidation and endocardial-mesenchymal transformation

Scientific Reports, 2021
An amendment to this paper has been published and can be accessed via a link at the top of the paper.
Takashi Shimizu, Kazuaki Maruyama, Takeshi Kawamura, Yoshihiro Urade, Youichiro Wada   +4 more
doaj   +1 more source

Hydrogeochemistry Characteristics of Groundwater in the Nandong Karst Water System, China

Atmosphere, 2022
The hydrogeochemical characteristics of groundwater are an important element in the study of the spatial and temporal variation of groundwater resources, which is crucial to water resources utilization, ecological environmental protection, and human ...
Xiuqun Zhu, Ling Liu, Funing Lan, Jun Li, Shitian Hou   +4 more
doaj   +1 more source

Hydrogeochemical characteristics of classical karst regions in Slovenia

Carsologica Sinica
Groundwater plays an important role in supplying drinking water, as well as supporting industrial and agricultural activities worldwide, especially in karst regions.
Ying MIAO, Cheng ZHANG, Prelovsek Mitja, Qiong XIAO   +3 more
doaj   +1 more source