中国科学院机构知识库网格系统: 检索

High-precision potassium isotope analysis using the Nu Sapphire collision cell (CC)-MC-ICP-MS 期刊论文 OAI收割
SCIENCE CHINA-EARTH SCIENCES, 2022, 页码: 12
作者: Li, Wenjun; Cui, Mengmeng; Pan, Qiqi; Wang, Jing

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收藏 | 浏览/下载：74/0 | 提交时间：2022/07/18

CC-MC-ICP-MS Potassium isotopes Geostandards Sample-standard bracketing method Low energy path

Quantitative proteomics reveals Shexiang Baoxin Pill exerts cardioprotective effects by preserving energy metabolism in a rat model of myocardial infarction 期刊论文 OAI收割
JOURNAL OF ETHNOPHARMACOLOGY, 2021, 卷号: 266, 页码: 10
作者: Yu, Feng; Yu, Yue; Tian, Saisai; Zhou, Yanting; Chen, Xiangling

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收藏 | 浏览/下载：68/0 | 提交时间：2021/05/24

Shexiang baoxin pill Cardiovascular disease LC-MS/MS Quantitative proteomics Energy metabolism

On the Terrestrial Gamma Ray Flashes Preceding Narrow Bipolar Events 期刊论文 OAI收割
Geophysical Research Letters, 2021, 卷号: 48, 页码: e92160
作者: HXMT

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收藏 | 浏览/下载：31/0 | 提交时间：2022/02/08

low frequency magnetic sferics narrow bipolar events (NBEs) relativistic feedback mechanism Terrestrial Gamma ray Flashes (TGFs) Abstract: Narrow bipolar events (NBEs) are occasionally reported to occur within a few ms after Terrestrial Gamma ray Flashes (TGFs), while the formation mechanism remains mysterious partially due to the lack of sufficient observations. Here, nine more TGFs of this scenario are reported with concurrent LF sferics and lightning location data. The gamma ray production in these TGFs preceded the occurrence of NBEs by a minimum of 60 µs up to 13.5 ms, and no other fast leader discharge was found within 20 ms before the TGF. The TGF preceded positive NBEs occurred at altitudes of 8.6-11 km in thunderstorms, likely in the high electric field (E field) region of lightning initiation. The analyses show that the NBE preceding TGFs bear harder energy spectrum with larger proportion of high energy photons than EIP related TGFs produced in association with lightning leader. Our findings support the relativistic feedback mechanism of gamma ray generation in the large scale thunderstorm E field.

Constraining the X-Ray-Infrared Spectral Index of Second-timescale Flares from SGR 1935+2154 with Palomar Gattini-IR 期刊论文 OAI收割
The Astrophysical Journal, 2020, 卷号: 901, 页码: L7
作者: HXMT

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收藏 | 浏览/下载：25/0 | 提交时间：2022/02/08

Radio transient sources Magnetars Soft gamma-ray repeaters 2008 992 1471 Astrophysics - High Energy Astrophysical Phenomena Astrophysics - Instrumentation and Methods for Astrophysics Abstract: The Galactic magnetar SGR 1935+2154 has been reported to produce the first example of a bright millisecond-duration radio burst (FRB 200428) similar to the cosmological population of fast radio bursts (FRBs). The detection of a coincident bright X-ray burst represents the first observed multiwavelength counterpart of an FRB. However, the search for similar emission at optical wavelengths has been hampered by the high inferred extinction on the line of sight. Here, we present results from the first search for second-timescale emission from the source at near-infrared (NIR) wavelengths using the Palomar Gattini-IR observing system in the J band, enabled by a novel detector readout mode that allows short exposure times of ?0.84 s with 99.9% observing efficiency. With a total observing time of ?12 hr (?47,728 images) during its 2020 outburst, we place median 3Ҡlimits on the second-timescale NIR fluence of ?18 Jy ms (13.1 AB mag). The corresponding extinction-corrected limit is ?125 Jy ms for an estimated extinction of A_J = 2.0 mag. Our observations were sensitive enough to easily detect an NIR counterpart of FRB 200428 if the NIR emission falls on the same power law as observed across its radio to X-ray spectrum. We report nondetection limits from epochs of four simultaneous X-ray bursts detected by the Insight-HXMT and NuSTAR telescopes during our observations. These limits provide the most stringent constraints to date on fluence of flares at 10¹⁴ Hz, and constrain the fluence ratio of the NIR emission to coincident X-ray bursts to R_NIR ? 0.025 (fluence index ?0.35).

Microseismic investigation of mining-induced brittle fault activation in a Chinese coal mine 期刊论文 OAI收割
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES, 2019, 卷号: 123, 页码: -
作者: Cheng, Guanwen; Li, Lianchong; Zhu, Wancheng; Yang, Tianhong; Tang, Chunan

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收藏 | 浏览/下载：35/0 | 提交时间：2020/04/08

MS (microseismic) monitoring Buried brittle fault activation MS energy b-value Focal mechanism

Enzyme-assisted extraction and liquid chromatography-inductively coupled plasma mass spectrometry for the determination of arsenic species in fish 期刊论文 OAI收割
JOURNAL OF CHROMATOGRAPHY A, 2018, 卷号: 1573, 页码: 48-58
作者: Liu, Yanfang; Guo, Zhimou; Zhu, Jianhua; Liang, Xinmiao; Zhao, Fa

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收藏 | 浏览/下载：49/0 | 提交时间：2019/06/20

Fish Arsenic species Protease Ammonium carbonate Kinetic energy discrimination HPLC-ICP-MS

Deconvoluting AMP-activated protein kinase (AMPK) adenine nucleotide binding and sensing 期刊论文 OAI收割
JOURNAL OF BIOLOGICAL CHEMISTRY, 2017, 卷号: 292, 期号: 30, 页码: 12653-12666
作者: Gu, Xin; Yan, Yan; Novick, Scott J.; Kovach, Amanda; Goswami, Devrishi

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收藏 | 浏览/下载：31/0 | 提交时间：2019/01/08

AMP AMP-activated kinase (AMPK) ATP energy metabolism protein kinase CBS HDX-MS NADPH

A Strategy Combining Higher Energy C-Trap Dissociation with Neutral Loss- and Product Ion-Based MSn Acquisition for Global Profiling and Structure Annotation of Fatty Acids Conjugates 期刊论文 OAI收割
JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY, 2017, 卷号: 28, 期号: 3, 页码: 443-451
作者: Bi, Qi-rui; Hou, Jin-jun; Yang, Min; Shen, Yao; Qi, Peng

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收藏 | 浏览/下载：55/0 | 提交时间：2019/01/08

Neutral loss based Ms-3 acquisition Product ion based Ms-4 acquisition Fatty acid conjugates Venenum bufonis Higher-energy C-trap dissociation Linear ion-trap quadrupole Orbitrap mass spectrometry

Multiple reaction monitoring of GC/MS/MS analysis of terpanes and its application to petroleum exploration 期刊论文 OAI收割
PETROLEUM SCIENCE AND TECHNOLOGY, 2017, 卷号: 35, 期号: 2, 页码: 134-140
作者: Qian, Yu; Wang, Zuodong; Tuo, Jincai; Zhang, Mingfeng; Wu, Chenjun

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收藏 | 浏览/下载：33/0 | 提交时间：2017/11/17

Collision Energy Gc Ms Mrm-gc Ms Ms Petroleum Exploration Terpanes

Targeted cofactor quantification in metabolically engineered E-coli using solid phase extraction and hydrophilic interaction liquid chromatography-mass spectrometry 期刊论文 OAI收割
JOURNAL OF CHROMATOGRAPHY B-ANALYTICAL TECHNOLOGIES IN THE BIOMEDICAL AND LIFE SCIENCES, 2016, 卷号: 1014, 页码: 107-115
作者: Li, Zhucui; Yang, Afang; Li, Yujing

收藏 | 浏览/下载：39/0 | 提交时间：2016/06/23

SPE HILIC-MS Cofactor Targeted metabolome Energy metabolism Isobutanol production