Results 71 to 80 of about 113,420 (306)

Compound-specific stable isotope analysis of nitrogen-containing intact polar lipids [PDF]

, 2015
Rationale Compound-specific isotope analysis (CSIA) of nitrogen in amino acids has proven a valuable tool in many fields (e.g. ecology). Several intact polar lipids (IPLs) also contain nitrogen, and their nitrogen isotope ratios have the potential to ...
Sinninghe Damsté, Jaap S., Schouten, Stefan, Svensson, Elizabeth, Organic geochemistry & molecular biogeology, Geochemistry, Organic geochemistry, Stam, Axel, Middelburg, Jack J.   +7 more
core   +1 more source

Investigation on hard‐rock breaking performance and auxiliary mechanism of picks assisted with both‐sided high‐pressure water jets

Deep Underground Science and Engineering, EarlyView.
This paper investigates the high‐pressure water jet‐pick combined rock‐breaking mode (HPC), which employs high‐pressure water jets to precut grooves on both sides of the picks. The rock‐breaking patterns and performance of the HPC method are obtained, and the auxiliary rock‐breaking mechanism of water jet grooving is revealed.
Jingjing Lu, Jiancheng Xiao, Hui Zhou, Xiao Ma, Congcong Hou, Jian Cui, Fujian Yang   +6 more
wiley   +1 more source

Insights into the influences of biochar on the fate and transport of pesticides in the soil environment: a critical review

Biochar
Pesticide misuse and overuse severely pollute agricultural soils, water, and crop yields, harming people and animals. This situation raises serious concerns about environmental pollution on a global scale. As an eco-friendly material for soil remediation,
Gratien Twagirayezu, Hongguang Cheng, Yanyou Wu, Hongyu Lu, Shenglan Huang, Xin Fang, Olivier Irumva   +6 more
doaj   +1 more source

Tracing nitrate sources with dual isotopes and long term monitoring of nitrogen species in the Yellow River, China

Scientific Reports, 2017
A heavy load of nitrogenous compounds reflects nutrient loss and influences water quality in large rivers. Nitrogenous concentrations and dual isotopes of nitrate were measured to ascertain the spatial and temporal distributions of nitrate transformation
Fu-Jun Yue, Si-Liang Li, Cong-Qiang Liu, Zhi-Qi Zhao, Hu Ding   +4 more
doaj   +1 more source

Ore Genesis of the Baishitouwa Quartz–Wolframite Vein-Type Deposit in the Southern Great Xing’an Range W Belt, NE China: Constraints from Wolframite In-Situ Geochronology and Geochemistry Analyses

, 2022
The Baishitouwa deposit is a medium-scale quartz–wolframite vein-type deposit in the southern Great Xing’an Range tungsten (W) belt. The W mineralization occurs mainly as veins and dissemination within the mica schist of the Mesoproterozoic ...
Wei Xie, Qingdong Zeng, Lingli Zhou, Zeng, Q., Wang, R., Lan, T., Xie, W., Jinjian Wu, Zhou, L., Tingguang Lan, Wu, J., Ruiliang Wang   +11 more
core   +1 more source

Generalized Matsuoka–Nakai criterion considering hydrostatic pressure dependence in the brittle–ductile region

Deep Underground Science and Engineering, EarlyView.
Three sets of strength data were selected, including hydrostatic pressure independent within the brittle region (HPI‐B), hydrostatic pressure dependent within the brittle region (HPD‐B), and hydrostatic pressure dependent within the brittle–ductile region (HPD‐BD). For HPI type, the failure envelope within the deviatoric plane remains constant.
Jiacun Liu, Junjie Xiao, Dongping Liu, Ying Xu   +3 more
wiley   +1 more source

Lytic viruses drive the decrease in polyphosphate-accumulating and phosphate-solubilizing potential of microbial communities with increasing reservoir age

Applied and Environmental Microbiology
River damming often leads to significant phosphorus enrichment in reservoir sediments and increases the risk of eutrophication with reservoir age. Microorganisms mediate critical steps of phosphorus cycling in ecosystems, and viruses are recognized as ...
Qiusheng Wu, Debin Wu, Jiayi Wang, Heng Wang, Jingjing Peng, Yuan Zhao, Jingan Chen, Quan Yuan   +7 more
doaj   +1 more source

Riverine Sediment Geochemistry as Provenance Fingerprints along the Eastern Coast of China: Constraint, Approach, and Application

, 2019
Sediment geochemistry is affected by sediment granularity and chemical partition, which may greatly influence the accuracy of sediment source identification.
Dan Zhang, Jing Chen, Ping Liu, Dandan Sun, Jie Chen, Bingdi Miao   +5 more
core   +1 more source

Experimental study on burning rate and flame geometry in construction tunnel fires under high geothermal conditions

Deep Underground Science and Engineering, EarlyView.
Abstract As tunnel construction advances in lengths and depths, the construction of tunnels in high geothermal environments has become increasingly common, raising significant fire risks. In this study, a 1:20 scale model tunnel test platform was constructed to investigate the effects of a high geothermal environment on fire behavior in tunnels during ...
Xiaoxian Fei, Maozhen Liu, Jiayi Ha, Linbo Du, Zhi Li, Yuhao Li, Chuangang Fan   +6 more
wiley   +1 more source

New Advances, Challenges, and Illustrations in Applied Geochemistry

Applied Sciences
The Special Issue ‘New Advances and Illustrations in Applied Geochemistry in China’ was organized for the presentation of ideas from the 9th National Conference on Applied Geochemistry in China held in Chengdu, Sichuan Province, in October 2023 [...]
Qingjie Gong, Zeming Shi
doaj   +1 more source