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Two New Isosteroid Alkaloids from Fritillaria monatha Migo（Ⅲ）

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Chinese Chemical Letters 2006年第5期17卷 631-634页

作者： hong Ning LIU Fei LI Yong ming luo Wei Feng ZHU Jiangxi University of Traditional Chinese Medicine Nanchang 330004

Two new isosteroid alkaloids, named pengbeimine A and pengbeimine C, were isolated from the fresh bulbs of FritiUaria monatha Migo. Their structures were determined by spectral methods, and were proved by X-ray diffra... 详细信息

关键词： Fritillaria monatha Migo isosteroid alkaloids pengbeimine A pengbeimine C.

Differential measurement of atmospheric refraction using a telescope with double fields of view

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Research in Astronomy and Astrophysics 2015年第10期15卷 1742-1750页

作者： Yong Yu Jian-Jun Cao Zheng-hong Tang Hao luo ming Zhao Shanghai Astronomical Observatory Chinese Academy of Sciences University of Chinese Academy of Sciences

For the sake of advancing theoretical research about atmospheric refrac- tion, the atmospheric refraction observed at lower angles of elevation is still worth analyzing and exploring. In some engineering applications, objects with a larger zenith distance must sometimes be observed. Carrying out observational research on atmospheric refraction at lower angles of elevation has an important significance. However, it has been considered difficult to measure the atmospheric refraction at lower angles of elevation. A new idea for determining atmospheric refraction by utilizing differential measurement with double fields of view is proposed. Taking the observational principle used by the HIPPARCOS satellite as a reference, a prototype with double fields of view was developed. In August 201 3, experimental observations were carried out and atmospheric refractions at lower angles of elevation were obtained by the prototype. The measured value of atmospheric refraction at a zenith distance of 78.8° was 240.23″±0.27″, and the feasibility of differential measurement of atmospheric refraction with double fields of view was verified. Limitations of the prototype, such as inadequate ability to gather light, lack of accurate meteorological data recording, and a low level of automation in observation and data processing, are pointed out, which need to be improved in subsequent work.

关键词： astrometry -- atmospheric effects -- methods: observational

Precision Work-piece Detection and Measurement Combining Top-down and Bottom-up Saliency

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International Journal of Automation and computing 2018年第4期15卷 417-430页

作者： Jia Sun Peng Wang Yong-Kang luo Gao-ming Hao hong Qiao Institute of Automation Chinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100190China

In this paper, a fast and accurate work-piece detection and measurement algorithm is proposed based on top-down feature extraction and bottom-up saliency estimation. Firstly, a top-down feature extraction method based on the prior knowledge of work- pieces is presented, in which the contour of a work-piece is chosen as the major feature and the corresponding template of the edges is created. Secondly, a bottom-up salient region estimation algorithm is proposed, where the image boundaries are labelled as background queries, and the salient region can be detected by computing contrast against image boundary. Finally, the calibration method for vision system with telecentric lens is discussed, and the dimensions of the work-pieces are measured. In addition, strategies such as image pyramids and a stopping criterion are adopted to speed-up the algorithm. An automatic system embedded with the proposed detection and measurement algorithm combining top-down and bottom-up saliency （DM-TBS） is designed to pick out defective work-pieces without any manual auxiliary. Experiments and results demonstrate the effectiveness of the proposed method.

关键词： Work-pieces detection salient region estimation top-down and bottom-up saliency(TBS) calibration visual measurement.

Purification and Characterization of a Novel Tetradecapeptide from Ginseng Polypeptides with Enhancing Memory Activity for Mice

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Chemical Research in Chinese Universities 2013年第4期29卷 638-641页

作者： luo Hao-ming JIANG Rui-zhi YANG Xiao-hong CHEN Ying-hong hong Tie WANG Ying School of Pharmaceutical Sciences Jilin University Changchun 130021 P R. China Jilin Academy of Chinese Medicine and Material Medical Science Changchun 130012 P. R. China

Aiming at isolating and investigating the active ingredients of the aqueous extract from Panax ginseng which showed enhancing memory activity, the authors characterized one ingredient. To separate the oligosaecharides and polypeptides, a DEAE-Sephadex A-50 colum was used. The enhanced memory activity in mice was studied by Mirros water maze tesk in mice. The dose of oligosacchrides, polypeptides or Piracetam was 30 mg/kg per day with intraperitoneal administration. The oligosaccharides did not show enhancing memory effect, but polypeptides did show. This result demonstrates that the active ingredients of the aqueous extract from Panax ginseng which showed enhancing memory effect was polypeptides. The purification of the polypeptides was performed on a Sephadex G-25 column. A novel tetradeeapeptide was purified from the polypeptides and its structure was determined by liquid chromatography-eleetrospray ionization-quadrupole-time of flight-mass spectrometry（LC-ESI-Q-TOF-MS） with the amino acid sequence of Lys-Ser-Leu-Thr-Leu-Thr-Ser-Ser-Leu-Ser-Tyr-Thr-Asp-Ser.

关键词： Panax ginseng Polypeptide Tetradecapeptide Enhanced memory activity Liquid chromatography-tandemmass spectrometry(LC-MS/MS)

Steroidal alkaloids from the bulbs of Fritillaria monatha

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Chinese Chemical Letters 2008年第5期19卷 544-546页

作者： hong Ning Liu Fei Li Yong ming luo Wei Feng Zhu Jiangxi University of Traditional Chinese Medicine Nanchang 330004 China

Two new Steroidal alkaloids, named pengbeisine A and pengbeisine B, were isolated from the fresh bulbs of Fritillaria monatha Migo. along with a known alkaloid. The structures were characterized as 22,26-imino-17, 23-oxido-5α-jerv-6-oxo-2α,3β-diol and 22, 26-imino-17, 23-oxido-5α-jerv-6-oxo-2β,3α-diol on the basis of spectroscopic methods.

关键词： Fritillaria monatha Migo Steroidal alkaloids Pengbeisine A Pengbeisine B

Allelopathic potential of Rhus chinensis on seedling growth of radish,semen cassiae and black soyabean

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Journal of Forestry Research 2015年第2期26卷 273-279页

作者： Long-yuan Liu hong-zhi He Shi-ming luo Hua-shou Li School of Chemistry and Chemical Engineering Guangdong Pharmaceutical University Key Laboratory of Tropical Agricultural Environment in South China the Ministry of AgriculturePeople’s Republic of ChinaSouth China Agricultural University

The allelopathic potential of Rhus chinensis Mill on seedling growth of radish（Raphanus sativus L.）,semen cassiae（seed of Cassia obtusifolia L.） and black soyabean [Glycine max（L.） Merr.] was investigated under laboratory *** water extracts of seed,leaf and bark of *** inhibited the germination and the growth of roots and shoots of radish,semen cassiae,and black *** increasing reductions in the germination and growth of roots and shoots were observed as the concentration of water extract increased in all *** order of allelopathic potentials of the three parts from *** plant on seed germination of these receptors was leaf [ seed [ ***,the inhibition of water extracts from *** seed on root activity of semen cassiae was more severe than from the other two *** allelopathic potential on the germination of radish was higher than that of black soyabean and semen *** integrated effect index for allelopathic potential of water extracts of leaf of *** on radish,semen cassiae and black soyabean seedling growth were-0.88,-0.93 and-0.98 *** results suggested that it is important to minimize the negative allelopathic potential of *** in agroforestry systems,and to exploit this traditional Chinese medicinal tree for the production of natural bio-pesticides.

关键词： Allelopathy Rhus chinensis Water extracts Seedling growth

Impact of community public health care on treatment effect,health cognition,and self-management in patients with type 2 diabetes

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World Journal of Clinical Cases 2025年第5期13卷 22-29页

作者： hong Shi Chun Liu hong-Yan luo Department of Infrastructure Operation West China Hospital of Sichuan UniversityChengdu 610041Sichuan ProvinceChina Department of Public Health Minzu Street Community Health Service CenterWuhan 430000Hubei ProvinceChina Caotang Community Health Service Center Chengdu 610031Sichuan ProvinceChina

BACKGROUND At present,China has become the country with the largest number of individuals with diabetes mellitus(DM)in the world,with a total of approximately 140 million patients,the majority of whom have type 2 DM(T2DM).Based on conven-tional nursing methods,community home care has important clinical significance in controlling blood sugar and disease *** To explore the impact of community public health nursing on treatment effect,health cognition,and self-management in patients with *** One hundred patients with T2DM were selected as the research *** patients were divided into either a conventional nursing group or community nursing(CN)group using the random number table *** conventional nursing group(50 cases)received routine care,while the CN group(50 cases)received community public health care in addition to routine care as that for the conventional nursing *** rate of excellent and good blood glucose control,fasting blood glucose before and after care,2-h postprandial blood glucose,health cognition,and self-management ability,and patient satisfaction were compared between the two *** The CN group had a higher rate of excellent blood sugar control than the conventional nursing group(88%vs 70%,P0.05).After nursing,fasting blood glucose and 2-h postprandial blood glucose were reduced to varying degrees in both groups,and both blood glucose levels in the CN group were lower than those of the conventional nursing group(P<0.05).Compared with the scores before care,the cognitive level score for diabetes and self-management ability score improved after care in both *** cognitive level and self-management ability of patients in the CN group were higher than those of the conventional nursing group(P<0.05).The overall satisfaction of the CN group was better than

关键词： Community public health care Type 2 diabetes Blood sugar control Self-management ability Cognition level

Optimized finite difference iterative scheme based on POD technique for 2D viscoelastic wave equation

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Applied Mathematics and Mechanics(English Edition) 2017年第12期38卷 1721-1732页

作者： hong XIA Zhendong luo School of Control and Computer Engineering North China Electric Power UniversityBeijing 102206China School of Mathematics and Physics North China Electric Power UniversityBeijing 102206China

This study develops an optimized finite difference iterative （OFDI） scheme for the two-dimensional （2D） viscoelastic wave equation. The OFDI scheme is obtained using a proper orthogonal decomposition （POD） method. It has sufficiently high accuracy with very few unknowns for the 2D viscoelastic wave equation. Existence, stability, and convergence of the OFDI solutions are analyzed. Numerical simulations verify efficiency and feasibility of the proposed scheme.

关键词： optimized finite difference iterative (OFDI) scheme viscoelastic wave equation proper orthogonal decomposition (POD) existence stability convergence numericalsimulation

High-temperature self-powered X-ray detection in a bilayered hybrid ferroelectric halide perovskite

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Science China Chemistry 2025年

作者： Yingying Zheng Panpan Yu Yunpeng Yao Shihai You Zeng-Kui Zhu Junhua luo School of Chemistry and Chemical Engineering Jiangxi Normal University Key Laboratory of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education Jiangxi Normal University School of Environmental and Material Engineering Yantai University Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China

X-ray detectors which convert X-ray irradiation into electrical signals play an important role in diverse applications including medical diagnosis, security examination, nondestructive inspection, personal X-ray dosimeters and fundamental research[1–5]. Recently, metal halide perovskites（MHP） have been developed as a promising family for X-ray detection contributing to their intrinsic advantages, e.g.,simple synthesis, efficient X-ray absorption and excellent semiconducting properties[5–10].

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