A5080894585- Advanced Chemical Physics Studies
- Industrial Technology and Control Systems
- Ammonia Synthesis and Nitrogen Reduction
- Higher Education and Teaching Methods
- Chinese history and philosophy
- Sports Analytics and Performance
- Spacecraft and Cryogenic Technologies
- Water Treatment and Disinfection
- Geoscience and Mining Technology
- Sports Dynamics and Biomechanics
- Gear and Bearing Dynamics Analysis
- Education and Work Dynamics
- Inorganic Fluorides and Related Compounds
- Sports Performance and Training
- Advanced Decision-Making Techniques
- Vibration Control and Rheological Fluids
- Environmental and Agricultural Sciences
- Geomechanics and Mining Engineering
- Advanced Algorithms and Applications
- Catalytic Processes in Materials Science
- Methane Hydrates and Related Phenomena
- Japanese History and Culture
- Advanced Sensor and Control Systems
- Diverse Aspects of Tourism Research
- Hydraulic Fracturing and Reservoir Analysis
Chongqing University
2024-2025
First Affiliated Hospital of Zhengzhou University
2022-2025
Harbin University of Science and Technology
2022-2024
China University of Mining and Technology
2022
China State Construction Engineering (China)
2022
Shandong Transportation Research Institute
2022
Zhengzhou University
2022
Zhejiang A & F University
2006-2022
Ministry of Housing and Urban-Rural Development
2020
University of Georgia
2017-2019
Intermittent fasting (IF) has received wide attention as an effective diet strategy. Existing studies showed that IF is a promising approach for weight control, improving insulin sensitivity and reducing type 2 diabetes mellitus (T2DM) prevalence. Twenty-eight 8-month-old male C57BL/6J mice were randomly divided into normal control group (NC), high-fat (HFD) HFD + group. Body (BW) food intake monitored weekly. After 20 weeks, the intraperitoneal glucose tolerance test (IPGTT), oral (OGTT),...
Nitrosamines are a class of carcinogenic, mutagenic, and teratogenic compounds generally produced from the nitrosation amine. This paper investigates mechanism for formation nitrosodimethylamine (NDMA) dimethylamine (DMA) by four common nitrosating agents (NO2–, ONOO–, N2O3, ONCl) in absence presence CO2 using DFT method. New insights provided into mechanism, emphasizing that interactions with amine both potentially important influencing role (catalyst or inhibitor). The as catalyst...
The drive to tackle teachers' support needs in the classroom has led a great increase demand for teaching assistant who can work variety of assignments, especially when it is difficult do only by teacher himself/herself. This study developed humanoid robot as provide teachers with necessary support, and applied particularly explain demonstrate two icebreaker games. To examine impact on learning, we carried out series experiments which students were organized learn rules games conditions: or...
The sustainable development of tourism is essential for revitalizing historically and culturally significant ancient villages in China. Despite the longstanding recognition relationship between spatial distribution village destinations their development, there a dearth longitudinal studies tourism. Using geographic information system (GIS) analysis method exploratory data model, this study explored spatial-temporal features over three important time nodes rural (in Zhejiang, China), as well...
Tertiary amines have been demonstrated to be capable of undergoing nitrosative cleavage produce carcinogenic N-nitrosamines. The reaction mechanism the nitrosation trimethylamine (TMA) N-nitrosodimethylamine (NDMA) was investigated at CBS-QB3 level theory. formation NDMA from TMA proposed initiated by an iminium ion, Me2N+═CH2. Two different mechanisms (NOH elimination and oxidation abstraction mechanism) leading Me2N+═CH2 were investigated, found mainly operative. This result indicates that...
The hydrogen abstraction reaction H2S + OH → H2O SH has been studied using the "gold standard" CCSD(T) method along with Dunning's aug-cc-pVXZ (up to 5Z) basis sets. For reactant (entrance) complex, predicts a HSH···OH hydrogen-bonded structure be lowest-lying, and other lower-lying isomers, including two-center three-electron hemibonded H2S···OH, have energies within 2 kcal/mol. similar situation is for product (exit) complex. With aug-cc-pV5Z single point at aug-cc-pVQZ geometry,...
Although evanescent at best, the bare dimers of elements Cr, Mo, and W have been identified as possible candidates for sextuple metal–metal bond. The corresponding dibenzene sandwich compounds Cr2(C6H6)2, Mo2(C6H6)2, W2(C6H6)2, satisfy ‘18-Electron Rule’, might achieve high-order bonds longer lifetimes same time. Twenty-two different DFT methods used to evaluate this possibility. Based on present Wiberg bond index molecular orbital analyses, however, only quadruple are predicted electronic...
The alkali-metal trihalides MX3 (M = Li, Na, K, Rb, and Cs; X Cl, Br, I) are systematically studied using coupled-cluster methods. Benchmarks CCSD(T) against diatomic experimental results suggest satisfactory performance for the weighted core-valence basis sets (new Cs) selected predicting reliable structures harmonic vibrational frequencies. An isomer search B3LYP functional yields a planar, yet asymmetric T-shaped Cs structure as global minimum all species. Much higher level computations...
Reliable biomarkers are needed to improve preeclampsia (PE) prediction accuracy. With the investigational tool of peptidomics, we aimed identify and validate potential serum peptide in cohorts suspected for PE development middle or late pregnancy.Totally 195 samples were prospectively collected from pregnant women with PE-related syndromes who followed up until delivery. Serum peptidomic analysis was performed discovery cohort 115 using matrix-assisted laser desorption ionization-time flight...
The mysterious F–F–F symmetric stretch frequencies for the MF<sub>3</sub> molecules continue to provide a great challenge theory and experiment.
Abstract Alkaline‐earth metallacyclopentadienes are an active area of research in synthetic chemistry, notable for their roles as precursors key cyclopentadiene derivatives. However, experimental characterization is limited due to challenging synthesis and subsequent isolation. Herein, we report systematic theoretical studies MC 4 H (M=Be, Mg, Ca, Sr, Ba) rings experimentally relevant complexes. Benchmarking against CCSD(T) experiment shows reasonable performance the B3LYP, BP86, M06‐2X...
Abstract Polymer flooding is of strategic importance to Daqing Oil Field. At present, the oil production by polymer more than 12 million tons per year. However, some problems still need be solved; fracturing in injection wells one these problems. After 40 conventional methods, results show that effective period less 3 months. This paper focuses on reasons this phenomenon (short period), how solve problem, what best operation procedure field and does it suit water also. From lab tests, was...
Transition metal complexes with terminal oxo and dioxygen ligands exist in oxidation reactions, many are key intermediates various catalytic biological processes. The prototypical oxo‐metal [(OC) 5 CrO, (OC) 4 FeO, 3 NiO] dioxygen‐metal carbonyls CrOO, FeOO, NiOO] studied theoretically. All three were found to have triplet ground states, metal‐oxo bond dissociation energies of 77 (CrO), 74 (FeO), 51 (NiO) kcal/mol. Natural orbital quantum theory atoms molecules analyses predict...
Buffer solutions were widely used for almost all the investigations concerning N‐nitrosodimethylamine (NDMA), a member of powerful mutagenic and carcinogenic compounds which are ubiquitous in environment. However, whether or how buffer matrixes influence NDMA formation is still unknown. The effect on from nitrosation dimethylamine (DMA) by nitrite (NaNO 2 ) was investigated at pH 6.4 four kinds solutions, that is, Na HPO 4 /C 6 H 8 O 7 , 3 (C 5 )/C NaH PO /NaOH, /Na . Our observations...
The ephemeral Criegee intermediate, first postulated over 70 years ago, has only recently been isolated in the gas phase. sulfur analogue of this canonical zwitterion, thioformaldehyde S-sulfide, eluded similar analysis; however, argon matrix isolation achieved ( Angew. Chem., Int. Ed. 2001 , 40 393 - 396 ). Here S-sulfide and its valence isomer dithiirane are examined with high-level coupled-cluster methods, including minimum-energy pathway for interconversion. Relative enthalpies...
Based on their highly sophisticated crossed-beam experimental studies of the Al + CO2 → AlO CO reaction, Honma and Hirata have directly challenged results earlier theoretical this system. We report high level It is shown that, consistent with Honma-Hirata conclusions, previous prediction a substantial barrier height for reaction was incorrect. However, structures possible intermediates, in agreement 1992 study Sakai, we find striking disagreement conclusion that O-C-O moiety nearly linear....
Download This Paper Open PDF in Browser Add to My Library Share: Permalink Using these links will ensure access this page indefinitely Copy URL DOI