المؤلفون: Wang, Shumin, Jiang, Zhiyan, Li, Xuejun, Sun, Chenghui, Zhang, Yixing, Xiao, Zhen

المصدر: Frontiers in Pediatrics ; volume 11 ; ISSN 2296-2360

مصطلحات موضوعية: Pediatrics, Perinatology and Child Health

الوصف: Background To investigate the relationship between serum Lactate dehydrogenase (LDH) and refractory Mycoplasma pneumoniae pneumonia (RMPP) in juvenile individuals. Methods Search Chinese databases and English databases. The retrieval time limit is from the establishment of the database to 2022-04-27. And screening and inclusion of relevant diagnostic test literature. The QUADAS-2 method was used to evaluate the quality of the included literature. The random effects model was used to combine sensitivity, specificity, likelihood ratio, diagnostic odds ratio, summary receiver operating characteristic curve, and area under summary receiver operating characteristic curve to evaluate the prediction value of LDH for RMPP. Subgroup analyses were used to explore sources of heterogeneity. Results ① A total of 29 literatures that met the criteria were included in the study, and the quality of the literature was medium and high, with a total of 702,2 patients. ② The combined sensitivity, specificity, positive likelihood ratio, negative likelihood ratio, diagnostic odds ratio, and area under the curve of the studies were: 0.75 (95% CI = 0.73–0.76), 0.73 (95% CI = 0.72–0.74), 3.61 (95% CI = 2.86–4.56), 0.30 (95% CI = 0.23–0.39), 13.04 (95% CI = 8.24–20.63), and 0.85(95% CI = 0.82–0.88). ③ The results of subgroup analysis showed that Compared with the subgroup with LDH threshold ≤400 IU/L, the AUC increased from 0.84 (95% CI = 0.80–0.87) to 0.89 (95% CI = 0.86–0.91). Conclusions The serum LDH has good accuracy for the diagnosis of RMPP and can serve as a diagnostic marker for RMPP.

الإتاحة: https://doi.org/10.3389/fped.2023.1094118Test

المؤلفون: Guo, Kailiang, Liu, Shuang, Men, Yong, Li, Lin, Hu, Jiajia, Xu, Junzhe, Sun, Chenghui, Wei, Gaixia, Wang, Jinguo, He, Shan, Wu, Bin, Huang, Xiaohui

المصدر: Reaction Kinetics, Mechanisms & Catalysis; Jun2024, Vol. 137 Issue 3, p1701-1720, 20p

مستخلص: Herein, we prepared Pd nanoparticle (NP) catalysts using XC-72 carbon supports through a tailored deposition–precipitation method. Our primary objective was to unravel the size effects of Pd NPs on hydrogenation of tetraacetyldibenzylhexaazaisowurtzitane (TADBIW), a pivotal intermediate for synthesis of high energy density materials hexanitrohexaazaisowurtzitane (CL-20). The controlled modulation of Pd NP size ranged from a mere 1.8 nm to 7.4 nm. Remarkably, our investigations into TADBIW hydrogenation unveiled a fascinating trend: the ultrasmall-sized Pd NPs with a diameter of 1.8 nm exhibited excellent yield and reaction rates. In stark contrast, their larger-sized counterparts demonstrated diminished catalytic activities. To disclose the size-dependent nature, various characterization techniques were employed, including XRD, TEM, XPS, CO and H2 pulse chemisorption. The comprehensive analysis revealed that the ultrasmall-sized Pd possessed more positively charged sites and exhibited higher dispersion. This unique configuration facilitated an accelerated adsorption of hydrogen and the electron-rich substrate TADBIW. Notably, this phenomenon led to a reduction in the activation energy through a thermodynamic effect, thereby enhancing overall catalytic performance. Our results strongly suggested that the ultrasmall-sized Pd NPs can exert a dominated influence on the physical and chemical states of the active sites, playing a key role in triggering the adsorption and activation of the substrate TADBIW. These findings not only deepen our understanding of the intricate connections between Pd NP size and catalytic activity but also open new avenues for advancing the design and optimization of catalysts in the hydrodebenzylation methodologies and synthesis of related compounds. [ABSTRACT FROM AUTHOR]

: Copyright of Reaction Kinetics, Mechanisms & Catalysis is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

المؤلفون: Xu, Lele, Sun, Chenghui, Liang, Chen, Yang, Jinsong, Yuan, Xinxin, Chen, Minghai

المساهمون: Double Thousand Plan of Jiangxi Province

المصدر: New Journal of Chemistry ; volume 48, issue 1, page 55-66 ; ISSN 1144-0546 1369-9261

الوصف: High-rate carbon nanotube/magnetic-sheet composites are in situ synthesized by fluidized bed for EMA. An RL value of −40.0 dB is achieved at a frequency of 5.0 GHz.

الإتاحة: https://doi.org/10.1039/d3nj04378aTest
http://pubs.rsc.org/en/content/articlepdf/2024/NJ/D3NJ04378ATest

المؤلفون: Zhang, He, Yan, Shixiong, Wang, Li, Sun, Chenghui, Cui, Jiwen

المساهمون: National Natural Science Foundation of China

المصدر: Measurement Science and Technology ; volume 35, issue 6, page 065021 ; ISSN 0957-0233 1361-6501

الوصف: The machining accuracy of the axis position and spatial angle of the array microholes with high aspect ratio on the components of the high-end equipment manufacturing industry will directly affect the performance of the whole machine. A method of tilt hole axis adjustment is proposed in this paper. It utilizes geometric optimization and minimum zone theory to measure the position and spatial angle of the hole axis. This addresses the slight angle error that occurs after correcting the inclined hole axis using visual techniques. Based on the minimum zone criterion for the cylindricity error, the evaluation model is re-established through the inner and the outer loop and spatial projection, which includes roundness evaluation of the projection curve by an improved particle swarm optimization (PSO) algorithm and elliptic fitting by a geometric parameter method, so as to obtain the optimal solution of the axis vector and spatial angle. Experimental comparison with the theory above shows that the precision of the method proposed is better than that of the least squares method and the traditional PSO algorithm based on the minimum zone criterion. The research results indicate that the precision of the tilt angle is better than 0.03°, and simultaneously the rotation angle is better than 0.1° in the range of 1°. This experiment verifies the effectiveness and accuracy of the proposed method.

الإتاحة: https://doi.org/10.1088/1361-6501/ad330aTest

المؤلفون: Liao, Jiaxian, Wei, Dongyan, Sun, Chenghui, Yang, Yuqi, Wei, Yinxia, Liu, Xinhui

المساهمون: Hechi Science and Technology Plan Project

المصدر: BMC Nephrology ; volume 23, issue 1 ; ISSN 1471-2369

مصطلحات موضوعية: Nephrology

الوصف: Background Hemodialysis (HD) is the most important renal replacement therapy for patients with end-stage kidney disease (ESKD). Systemic inflammation is a risk factor of mortality in HD patients. Neutrophil-to-lymphocyte ratio (NLR), monocyte-to-lymphocyte ratio (MLR), and platelet-to-lymphocyte ratio (PLR) are new inflammatory markers. However, previous studies have inconsistent conclusions about the predictive value of NLR, MLR and PLR on mortality of HD patients. The aim of this study was to establish an inflammation scoring system by including NLR, MLR and PLR, and evaluate the association between the inflammation score and all-cause and cardiovascular mortality in HD patients. Methods In this single center retrospective cohort study, 213 incident HD patients from January 1, 2015 to December 31, 2020 were included. Baseline demographic and clinical data and laboratory measurements were collected. According to the optimal cut-off values, NLR, MLR and PLR were assigned 0 or 1 point, respectively. Then, the inflammation score was obtained by adding the NLR, MLR and PLR scores. All patients were followed until July 31, 2021. The associations of the inflammation score with all-cause and cardiovascular mortality were assessed by multivariable-adjusted Cox models. Results Of 213 patients, the mean (± SD) age was 56.8 ± 14.4 years, 66.2% were men, and 32.9% with diabetes. The primary cause of ESKD was mainly chronic glomerulonephritis (46.5%) and diabetic nephropathy (28.6%). The median inflammation score was 2 (interquartile range = 1–3). During a median 30 months (interquartile range = 17–50 months) follow-up period, 53 patients had died, of which 33 deaths were caused by cardiovascular disease. After adjusting for demographics, primary diseases and other confounders in multivariable model, the inflammation score = 3 was associated with a hazard ratio for all-cause mortality of 4.562 (95% confidence interval, 1.342–15.504, P = 0.015) and a hazard ratio for cardiovascular mortality of 4.027 (95% confidence ...

الإتاحة: https://doi.org/10.1186/s12882-022-03020-1Test

المؤلفون: Li, Xuejun, Jiang, Zhiyan, Xiao, Zhen, Liu, Xiuxiu, Wang, Shumin, Liu, Anqi, Sun, Chenghui

المصدر: Pharmacological Research - Modern Chinese Medicine ; volume 4, page 100128 ; ISSN 2667-1425

الإتاحة: https://doi.org/10.1016/j.prmcm.2022.100128Test
https://api.elsevier.com/content/article/PII:S2667142522000884?httpAccept=text/xmlTest
https://api.elsevier.com/content/article/PII:S2667142522000884?httpAccept=text/plainTest

المؤلفون: Bao, Lingxiang, Liang, Honggang, Zhang, Haonan, Yan, Zhiyuan, Sun, Chenghui, Pang, Siping

المصدر: IOP Conference Series: Materials Science and Engineering ; volume 772, issue 1, page 012101 ; ISSN 1757-8981 1757-899X

الوصف: This work represents a green and facile approach for the polystyrene supported nickel catalysed deprotection of allylic tertiary amine. The careful instrumental investigations with XPS, TEM, TGA, XRD and ICP-AES precisely characterized the developed heterogeneous catalyst. Cheap metal, mild reaction conditions, good yields as well as the reusability of the catalyst made this method more environmentally friendly.

الإتاحة: https://doi.org/10.1088/1757-899x/772/1/012101Test

المؤلفون: Fei, Teng, Sun, Chenghui, He, Chunlin, Pang, Siping

المساهمون: National Natural Science Foundation of China, BIT

المصدر: Energetic Materials Frontiers ; volume 1, issue 1, page 26-33 ; ISSN 2666-6472

الإتاحة: https://doi.org/10.1016/j.enmf.2020.06.001Test
https://api.elsevier.com/content/article/PII:S2666647220300038?httpAccept=text/xmlTest
https://api.elsevier.com/content/article/PII:S2666647220300038?httpAccept=text/plainTest

المؤلفون: Zhang, Wenjin, Yang, Yiling, Shi, Shaoyi, Pang, Siping, Li, Yuchuan, Sun, Chenghui

المصدر: Physical Chemistry Chemical Physics (PCCP); 8/14/2023, Vol. 25 Issue 30, p20168-20172, 5p

مستخلص: Selective regulation of stability and density via isomerism is a promising strategy for developing energetic materials. In this work, we selectively introduced dinitromethyl groups at different positions of 4-nitro-1,2,3-triazole. The regional heterogeneity endows a high crystal density by virtue of the dense packing; on the other hand, it changes the charge distribution in the molecule, and reinforces the hydrogen bonding interactions, all of which stabilize the material. The resulting compounds exhibit excellent detonation properties and impact sensitivity that are comparable to those of HMX (Dv = 9250 m s⁻¹ and IS = 10 J). [ABSTRACT FROM AUTHOR]

: Copyright of Physical Chemistry Chemical Physics (PCCP) is the property of Royal Society of Chemistry and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

المؤلفون: Zhang, Rui, Shen, Yitong, He, Juanxia, Zhang, Chenyan, Ma, Yelin, Sun, Chenghui, Song, Xiaopan, Li, Li, Zhang, Sisi, Biró, János Barnabás, Saifi, Farheen, Kaló, Péter, Chen, Rujin

مصطلحات موضوعية: QK10 Plant physiology / növényélettan

الوصف: Symbiotic interactions between legumes and rhizobia lead to the development of root nodules and nitrogen fixation by differentiated bacteroids within nodules. Differentiation of the endosymbionts is reversible or terminal, determined by plant effectors. In inverted repeat lacking clade legumes, nodule-specific cysteine-rich (NCR) peptides control the terminal differentiation of bacteroids. Medicago truncatula contains ∼700 NCR-coding genes. However, the role of few NCR peptides has been demonstrated. Here, we report characterization of fast neutron 2106 (FN2106), a symbiotic nitrogen fixation defective (fix−) mutant of M. truncatula. Using a transcript-based approach, together with linkage and complementation tests, we showed that loss-of-function of NCR343 results in impaired bacteroid differentiation and/or maintenance and premature nodule senescence of the FN2106 mutant. NCR343 was specifically expressed in nodules. Subcellular localization studies showed that the functional NCR343-YFP fusion protein colocalizes with bacteroids in symbiosomes in infected nodule cells. Transcriptomic analyses identified senescence-, but not defense-related genes, as being significantly upregulated in ncr343 (FN2106) nodules. Taken together, results from our phenotypic and transcriptomic analyses of a loss-of-function ncr343 mutant demonstrate an essential role of NCR343 in bacteroid differentiation and/or maintenance required for symbiotic nitrogen fixation.

وصف الملف: text

العلاقة: http://real.mtak.hu/175166/1/kiad454.pdfTest; Zhang, Rui and Shen, Yitong and He, Juanxia and Zhang, Chenyan and Ma, Yelin and Sun, Chenghui and Song, Xiaopan and Li, Li and Zhang, Sisi and Biró, János Barnabás and Saifi, Farheen and Kaló, Péter and Chen, Rujin (2023) Nodule-specific cysteine-rich peptide 343 is required for symbiotic nitrogen fixation in Medicago truncatula. PLANT PHYSIOLOGY. ISSN 0032-0889 (In Press)

الإتاحة: https://doi.org/10.1093/plphys/kiad454Test
http://real.mtak.hu/175166Test/
http://real.mtak.hu/175166/1/kiad454.pdfTest