Search results for: Xin-Zhi Wang

Items from 1 to 20 out of 31 results

article

Chemical profile and difference analysis of four parts of Strobilanthes sarcorrhiza by ultrafast flow liquid chromatography coupled with quadrupole‐time‐of‐flight mass spectrometry and multivariate statistical analysis

Zheng Tian, Yu Zhang, Xin‐zhi Wang, Xiao‐bing Cui, more

Biomedical Chromatography > 38 > 5 > n/a - n/a

Strobilanthes sarcorrhiza (CTS) is a medicinal plant with various pharmacological effects such as tonifying kidney and anti‐inflammatory. However, the chemical composition and difference of its four parts (leaves, stems, rhizomes, and root tubers) have been rarely reported. In this study, ultrafast flow liquid chromatography coupled with quadrupole‐time‐of‐flight MS was applied to analyze the chemical...

article

Influence of sulfur fumigation on the chemical profiles of Atractylodes macrocephala Koidz. evaluated by UFLC–QTOF–MS combined with multivariate statistical analysis

Xue Sun, Xiao-bing Cui, Hong-mei Wen, Chen-xiao Shan, more

Journal of Pharmaceutical and Biomedical Analysis > 2017 > 141 > C > 19-31

In the present study, the chemical compositions of Atractylodes macrocephala Koidz. (AMK) were analyzed systematically and influence of sulfur fumigation on the chemical profiles was evaluated by ultrafast flow liquid chromatography coupled with quadrupole-time-of-flight mass spectrometry (UFLC–QTOF–MS) combined with multivariate statistical analysis. 52 components were detected from non-fumigated...

article

Experimental study on permeability characteristics of calcareous soil

Xin-zhi Wang, Xing Wang, Jian-wen Chen, Ren Wang, more

Bulletin of Engineering Geology and the Environment > 2018 > 77 > 4 > 1753-1762

The artificial islands are covered by calcareous soil (CS) through hydraulic reclamation on coral reefs in the South China Sea. After construction of land reclamation, abundant rainwater infiltrates into the island and becomes groundwater. Therefore, the permeability of CS plays a critical role in the development of underground freshwater in islands. In this paper, a series of laboratory seepage experiments...

article

Determination of a natural DNMT1 inhibitor, peperomin E, in rat plasma by UFLC‐MS/MS and method application in a pharmacokinetic study

Xin‐zhi Wang, Hong‐mei Wen, Chuan Chai, Wen‐ying Zhang, more

Biomedical Chromatography > 31 > 8 > n/a - n/a

Peperomin E (PepE), a naturally occurring secolignan isolated from Peperomia dindygulensis, has drawn much attention recently owing to its anticancer and DNA methyltransferase 1 (DNMT1) inhibitory activity. Here, a simple and sensitive ultra‐fast liquid chromatography–tandem mass spectrometry method was developed and validated for the determination of PepE in rat plasma for the first time. Samples...

article

Investigation of engineering characteristics of calcareous soils from fringing reef

Xin-Zhi Wang, Xing Wang, Zong-Chuan Jin, Chang-Qi Zhu, more

Ocean Engineering > 2017 > 134 > C > 77-86

Engineering characteristics of calcareous soils are more peculiar due to the grain geometries, hardness and intraparticle voids. In the fringing reef in Sanya, calcareous soils were mixed with some terrestrial deposits, such as quartz sand and clay. In this paper, a series of laboratory and in-situ tests are conducted on calcareous soils to investigate the engineering characteristics and the effect...

article

Shear characteristics of calcareous gravelly soil

Xin-Zhi Wang, Xing Wang, Zong-Chuan Jin, Qing-Shan Meng, more

Bulletin of Engineering Geology and the Environment > 2017 > 76 > 2 > 561-573

Because of its angularity, crushability, and high void ratio, calcareous gravelly soil has peculiar geotechnical properties. A series of large-scale direct laboratory shear tests was conducted on calcareous gravelly soil taken from coral reefs in the South China Sea. This study aimed to investigate the shear characteristics of calcareous gravelly soil under conditions of varying gradation, water content,...

article

The natural secolignan peperomin E induces apoptosis of human gastric carcinoma cells via the mitochondrial and PI3K/Akt signaling pathways in vitro and in vivo

Xin-zhi Wang, Ying Cheng, Hao Wu, Na Li, more

Phytomedicine > 2016 > 23 > 8 > 818-827

Peperomin E (PepE) is a type of secolignan that is a major component of the plant Peperomia dindygulensis. It has been shown to exert anticancer effects in various cancer cell lines; however, the effects of PepE on human gastric cancer remain unexplored. The aim of this study was to investigate the effectiveness of PepE as a treatment of gastric cancer and to identify the underlying mechanisms of...

article

Arc–surface intersection method to calculate cutter–workpiece engagements for generic cutter in five-axis milling

Zhou-Long Li, Xin-Zhi Wang, Li-Min Zhu

Computer-Aided Design > 2016 > 73 > C > 1-10

Calculating cutter–workpiece engagements (CWEs) is essential to the physical simulation of milling process that starts with the prediction of cutting forces. As for five-axis milling of free form surfaces, the calculation of CWEs remains a challenge due to the complicated and varying engagement geometries that occur between the cutter and the in-process workpiece. In this paper, a new arc–surface...

article

Rapid Determination of Free Amino Acids, Nucleosides, and Nucleobases in Commercial Clam Species Harvested at Different Seasons in Jiangsu, China, Using UFLC-MS/MS

Xin-zhi Wang, Hao Wu, Na Li, Ying Cheng, more

Food Analytical Methods > 2016 > 9 > 6 > 1520-1531

In this study, a sensitive and rapid method for the simultaneous quantification of 17 nucleosides and nucleobases and 23 free amino acids in clam samples using ultra-fast liquid chromatography coupled with tandem mass spectrometry (UFLC-MS/MS) was developed. Sufficient separation of 40 analytes was achieved on an Acquity BEH Amide column (2.1 mm × 100 mm, 1.7 μm) in a single run of 15 min. The overall...

article

Study on pharmacokinetics of 3,4-divanillyltetrahydrofuran in rats by ultra-fast liquid chromatography/tandem mass spectrometry

Chen-xiao Shan, Xiao-bing Cui, Sheng Yu, Chuan Chai, more

Journal of Chromatography B > 2016 > 1008 > C > 250-254

3,4-Divanillyltetrahydrofuran is the main active ingredient of nettle root which can increase steroid hormones in the bloodstream for many of bodybuilders. To better understand its pharmacological activities, we need to determine its pharmacokinetic profiles. In this study, a rapid and sensitive ultra-fast liquid chromatography-tandem mass spectrometry (UFLC–MS/MS) method has been developed for the...

article

Mechanistic modeling of five-axis machining with a general end mill considering cutter runout

Zhou-Long Li, Jin-Bo Niu, Xin-Zhi Wang, Li-Min Zhu

International Journal of Machine Tools and Manufacture > 2015 > 96 > Complete > 67-79

The accurate and fast prediction of cutting forces in five-axis milling of free-form surfaces remains a challenge due to difficulties in determining the varying cutter-workpiece engagement (CWE) boundaries and the instantaneous uncut chip thickness (IUCT) along the tool path. This paper proposes an approach to predict the cutting forces in five-axis milling process with a general end mill considering...

article

Novel Method of Fabricating Individual Trays for Maxillectomy Patients by Computer‐Aided Design and Rapid Prototyping

Zhi Huang, Xin‐zhi Wang, Yue‐zhong Hou

Journal of Prosthodontics > 24 > 2 > 115 - 120

PurposeMaking impressions for maxillectomy patients is an essential but difficult task. This study developed a novel method to fabricate individual trays by computer‐aided design (CAD) and rapid prototyping (RP) to simplify the process and enhance patient safety. Materials and MethodsFive unilateral maxillectomy patients were recruited for this study. For each patient, a computed tomography (CT)...

article

Metabolite identification of liguzinediol in dogs by ultra-flow liquid chromatography/tandem mass spectrometry

Chen-xiao Shan, Wei Li, Hong-mei Wen, Xin-zhi Wang, more

Journal of Chromatography B > 2014 > 967 > Complete > 63-68

Ultra-flow liquid chromatography/quadrupole-time-of-flight mass spectrometry (UFLC/Q-TOF MS) method combined with metabolitepilot ^MT software was used for analysis of the metabolites of liguzinediol in dogs. Urine, bile, feces and plasma samples were collected after intravenous administration of 8mg/kg liguzinediol to healthy dogs. Besides liguzinediol, seven metabolites were detected and...

article

Formation and sedimentary evolution characteristics of Yongshu Atoll in the South China Sea Islands

Chang-qi Zhu, Yue Qin, Qing-shan Meng, Xin-zhi Wang, more

Ocean Engineering > 2014 > 84 > Complete > 61-66

An on-site comparison is made on the reef body shape and landform of the Yongshu Atoll in the South China Sea. Accordingly, the reef top of the Yongshu Atoll in the transverse direction is divided into six facies zones. In the longitudinal direction, the developmental model of the Yongshu Atoll has a stepwise, tower-like structure. The results of engineering geological drilling show that since the...

article

Thermal-mechanical response of microscale functional film for infrared window

Xing LIU, Xin-zhi WANG, Jia-qi ZHU, Jie-cai HAN

Transactions of Nonferrous Metals Society of China > 2014 > 24 > 6 > 1791-1799

Infrared window in hypersonic missile usually suffers complex aerodynamic force/heat during high-speed flight. A finite element method was adopted to simulate the thermal and stress response of microscale functional film for infrared window under different aerodynamic heats/forces conditions. Temperature and stress distribution were obtained with different heat fluxes. There is almost constant stress...

article

Qualitative and quantitative analyses of bioactive secolignans from folk medicinal plant Peperomia dindygulensis using UHPLC-UV/Q-TOF-MS

Xin-zhi Wang, Jing-yu Liang, Hong-mei Wen, Chen-xiao Shan, more

Journal of Pharmaceutical and Biomedical Analysis > 2014 > 94 > Complete > 1-11

Peperomia dindygulensis, with secolignans (SLs) as major bioactive constituents, is a commonly used traditional folk medicine in mainland China for treatment of stomach, liver, mammary, and esophageal cancers. However, to date, there is no method available for the qualitative and quantitative analyses of SLs in this medicinal plant. The purpose of this study was to establish a sensitive, selective,...

article

Simultaneous determination of five bioactive secolignans in rat plasma by LC–MS/MS for pharmacokinetic studies following oral administration of Peperomia dindygulensis Miq. extract

Xin-zhi Wang, Jing-yu Liang, Hong-mei Wen, Chen-xiao Shan, more

Journal of Chromatography B > 2014 > 944 > Complete > 82-89

A rapid and sensitive ultra fast performance liquid chromatography–tandem mass spectrometry method was developed for the simultaneous determination of five bioactive secolignans in Peperomia dindygulensis extract, including peperomin A, peperomin B, peperomin C, 4″-hydroxypeperomin B and 4″-hydroxypeperomin C in rat plasma. Arctigenin was used as the internal standard. The separation was performed...

article

A new β-carboline alkaloid from the seeds of Griffonia simplicifolia

Xin-Zhi WANG, Fei-Hua WU, Wei QU, Jing-Yu LIANG

Chinese Journal of Natural Medicines > 2013 > 11 > 4 > 401-405

To study the chemical constituents from the seeds of Griffonia simplicifolia Baill. The chemical constituents were isolated and purified by a combination of chromatographic materials including silica gel, Sephadex LH-20, and preparative TLC. Their structures were elucidated on the basis of MS and NMR data analysis. The cytotoxic activities were evaluated against HepG2 cancer cell line using the...

article

Stability assessment of an ancient landslide crossed by two coal mine tunnels

Yu-Yong Jiao, Zi-Hao Wang, Xin-Zhi Wang, Amoussou Coffi Adoko, more

Engineering Geology > 2013 > 159 > Complete > 36-44

In 2005, when two main tunnels were excavated in Faer Coal Mine, Guizhou Province, China, an unknown ancient landslide, subsequently named Dazhai landslide, was encountered. Roof caving, large convergence and severe support damage in the tunnels, as well as several ground subsidence occurred. The two tunnels have been kept stable after an inner supporting treatment in 2008. However, since a heavy...

article

Improvement of the U-shaped steel sets for supporting the roadways in loose thick coal seam

Yu-Yong Jiao, Liang Song, Xin-Zhi Wang, Amoussou Coffi Adoko

International Journal of Rock Mechanics and Mining Sciences > 2013 > 60 > Complete > 19-25

This paper aims at improving the traditional U-shaped steel sets to efficiently support and stabilize the roadways in loose thick coal seam. The proposed supporting structure is an integrated shed system which is based on backfilling of chemical grouting material behind yieldable steel sets, i.e., metal mesh plus backfilled chemical grouting material plus double resistant geomembrane plus U-shaped...

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INFONA - science communication portal

Search results for: Xin-Zhi Wang

Chemical profile and difference analysis of four parts of Strobilanthes sarcorrhiza by ultrafast flow liquid chromatography coupled with quadrupole‐time‐of‐flight mass spectrometry and multivariate statistical analysis

Influence of sulfur fumigation on the chemical profiles of Atractylodes macrocephala Koidz. evaluated by UFLC–QTOF–MS combined with multivariate statistical analysis

Experimental study on permeability characteristics of calcareous soil

Determination of a natural DNMT1 inhibitor, peperomin E, in rat plasma by UFLC‐MS/MS and method application in a pharmacokinetic study

Investigation of engineering characteristics of calcareous soils from fringing reef

Shear characteristics of calcareous gravelly soil

The natural secolignan peperomin E induces apoptosis of human gastric carcinoma cells via the mitochondrial and PI3K/Akt signaling pathways in vitro and in vivo

Arc–surface intersection method to calculate cutter–workpiece engagements for generic cutter in five-axis milling

Rapid Determination of Free Amino Acids, Nucleosides, and Nucleobases in Commercial Clam Species Harvested at Different Seasons in Jiangsu, China, Using UFLC-MS/MS

Study on pharmacokinetics of 3,4-divanillyltetrahydrofuran in rats by ultra-fast liquid chromatography/tandem mass spectrometry

Mechanistic modeling of five-axis machining with a general end mill considering cutter runout

Novel Method of Fabricating Individual Trays for Maxillectomy Patients by Computer‐Aided Design and Rapid Prototyping

Metabolite identification of liguzinediol in dogs by ultra-flow liquid chromatography/tandem mass spectrometry

Formation and sedimentary evolution characteristics of Yongshu Atoll in the South China Sea Islands

Thermal-mechanical response of microscale functional film for infrared window

Qualitative and quantitative analyses of bioactive secolignans from folk medicinal plant Peperomia dindygulensis using UHPLC-UV/Q-TOF-MS

Simultaneous determination of five bioactive secolignans in rat plasma by LC–MS/MS for pharmacokinetic studies following oral administration of Peperomia dindygulensis Miq. extract

A new β-carboline alkaloid from the seeds of Griffonia simplicifolia

Stability assessment of an ancient landslide crossed by two coal mine tunnels

Improvement of the U-shaped steel sets for supporting the roadways in loose thick coal seam

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