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Preparation of Titanium Microfiltration Membrane by Field-flow Fractionation Deposition
Wang QiangBing,Tang HuiPing,Zhang QianCheng,Qiu QunFeng,Wang JianYong 한국분말야금학회 2006 한국분말야금학회 학술대회논문집 Vol.2006 No.1
The primary aim pursued by the preparation of separation membrane is the preparation of the membrane thin as well as with no defect. The field-flow fractionation deposition is a new molding technology which can overcome the traditional disadvantages such as multi-preparation to the preparation of great area of separation membrane with no defect. Therefor the mainly ingredients which influence the appearance and performance of titanium membrane layer are investigated by scanning electricity mirror (SEM) as well as porous material testing instrument: powder performance prepared and confected; selection of supporting body; sintering system such as temperature and time. It is shown that the membrane thickness can be controlled at or so; the filtration precision mainly rests with powder performance and selection of supporting body and little sintering system
Jiatai Gu,Zhenzhen Quan,Liming Wang,Hongnan Zhang,Ni Wang,Xiaohong Qin,Rongwu Wang,Jianyong Yu 한국섬유공학회 2022 Fibers and polymers Vol.23 No.6
Membranes with the functions of waterproofness and breathability are of great interest due to their huge scientificand commercial value in many practical applications. However, designing such membranes with a desirable performance bysimple and efficient fabrication process remains a tremendous challenge. Herein, novel binary structured composite fibrousmembranes were developed for waterproof and breathable applications via simple one-step multi-jet electrospinningtechnology. This composite membranes were made up of polyvinylidene fluoride (PVDF) and polyacrylonitrile (PAN). PVDF was incorporated into the PAN fiber matrix as a modifier to improve the hydrophobic behavior of fibers. Meanwhile,PVDF microspheres/fibers were employed as building blocks to orderly embed in PAN/PVDF fiber framework, impartingthe composite membranes with fluffy micro-nano hierarchical structures. Consequently, with the integrated features of robusthydrophobicity as well as elaborate fiber-microsphere binary structure, the resultant composite membranes exhibitedsynergistically modest waterproof and breathable performances with the hydrostatic pressure of 18.04 kPa, water vaportransmittance (WVT) rate of 4.65 kg m-2 d-1, and air permeability of 64.19 mm s-1. This simple preparation process andunique composite structure may provide a new insight to design and fabricate waterproof and breathable membranes forvariously potential applications, including the protective clothing, separation membrane, and filter.
The updated role of exosomal proteins in the diagnosis, prognosis, and treatment of cancer
Wang Xinyi,Huang Jing,Chen Wenjie,Li Genpeng,Li Zhihui,Lei Jianyong 생화학분자생물학회 2022 Experimental and molecular medicine Vol.54 No.-
Exosomes are vesicles encompassed by a lipid bilayer that are released by various living cells. Exosomal proteins are encapsulated within the membrane or embedded on the surface. As an important type of exosome cargo, exosomal proteins can reflect the physiological status of the parent cell and play an essential role in cell–cell communication. Exosomal proteins can regulate tumor development, including tumor-related immune regulation, microenvironment reconstruction, angiogenesis, epithelial–mesenchymal transition, metastasis, etc. The features of exosomal proteins can provide insight into exosome generation, targeting, and biological function and are potential sources of markers for cancer diagnosis, prognosis, and treatment. Here, we summarize the effects of exosomal proteins on cancer biology, the latest progress in the application of exosomal proteins in cancer diagnosis and prognosis, and the potential contribution of exosomal proteins in cancer therapeutics and vaccines.
A Study of the Dynamic Characteristics of Red Sandstone Residual Soils Based on SHPB Tests
Tong Wang,Zhanping Song,Jianyong Yang,Qiang Zhang,Yun Cheng 대한토목학회 2021 KSCE JOURNAL OF CIVIL ENGINEERING Vol.25 No.5
To explore the response characteristics of soil under dynamic loads, cyclic impact tests with varying axial compressions and impact velocities were conducted using SHPB tests. The test results were analyzed to study the mechanical properties and energy dissipation characteristics due to impact loads. In terms of mechanical properties, for the same impact times, the peak stress of the specimen with axial compression was found to be greater than that without axial compression, but the final strain was lower than that without axial compression, indicating that axial compression affects the peak stress and final strain of the specimen. The dynamic stress strengthening of the specimen under cyclic impact loads has also been analyzed. In terms of energy dissipation, the effects of axial compression, impact velocity, and impact times on the ratios of dissipated energy, reflected energy, and transmitted energy to incident energy were compared, and it was found that the ratio of the dissipated energy did not exceed 24% under any condition. In terms of damage evolution, the damage variable gradually decreases with an increase in impact times. A critical value of the damage variable was determined, above which the transmittance continued to decrease, the reflectivity gradually increased, and the dissipation rate remained stable.
Jianming Wang,Siqi Luan,Jianyong Zhu,Xiaodong Mao,Junqiang Wu 한국항공우주학회 2021 International Journal of Aeronautical and Space Sc Vol.22 No.2
The flow field structure of a single injection port fluidic thrust vectoring nozzle was studied by introducing secondary flow injection in the expansion section of the two-dimensional convergent-divergent nozzle. To determine the motion characteristics of unsteady flow in a shock-induced fluidic vectoring nozzle, detached eddy simulation was conducted to simulate the three-dimensional flow field, and the flow mechanism in the nozzle was analyzed. Fourier mode decomposition was used to analyze the pressure coefficient on the symmetrical surface of the nozzle. Results show three natural frequencies in the flow field of the shock-induced fluidic vectoring nozzle. The first-order mode corresponding to frequency f1 = 512.8 Hz mainly illustrates the oscillation of shock waves. The second-order mode corresponding to frequency f2 = 2825 Hz illustrates the shedding of vortices. The third-order mode corresponding to frequency f3 = 4650 Hz is similar to the second-order mode; however, the spatial scales of vortices decrease.
Chemical constituents from the fruiting bodies of Cryptoporus volvatus
Junchi Wang,Guangzhi Li,Na Lv,Li Gao,Liangang Shen,Jianyong Si 대한약학회 2016 Archives of Pharmacal Research Vol.39 No.6
New drimane-type sesquiterpene cryptoporol A(1), cryptoporic acid derivative 60-cryptoporic acid E methylester (2), and pseudouridine derivative cryptoporineA(3), aswell as a known ergosterol 5a,8a-epidioxy-22E-ergosta-6,22-dien-3b-ol (4), were isolated from a 90 % alcoholextract of the fruiting bodies of Cryptoporus volvatus. Thestructures of these compounds were established by spectroscopicanalysis and circular dichroism. 5a,8a-epidioxy-22Eergosta-6,22-dien-3b-ol (4) exhibited antiviral activityagainst porcine reproductive and respiratory syndrome virus,and all compounds showed weak antioxidant activities.
Illuminating the hepatotoxic mechanism of norcantharidin in rats using metabolomics analysis
Cheng Weina,Chen Qihong,Wang Xiaoning,Liu Liu,Li Xiaofei,Duan Cancan,Zhang Jianyong 대한독성 유전단백체 학회 2023 Molecular & cellular toxicology Vol.19 No.3
Norcantharidin (NCTD) has multiple antitumor effects. However, NCTD can induce significant hepatotoxicity and the mechanism of hepatotoxicity is not clear for now.This study aimed to explore the hepatotoxicity of NCTD in rat by ultra-performance liquid chromatography (UPLC) quadrupole time-of-flight (Q-TOF)-MS (UPLC/Q-TOF-MS) metabolomics.Serum biochemical indices including alanine aminotransferase (ALT) and total bilirubin (T-BIL) were significantly increased. Histopathological and ultrastructure results revealed that hepatocytes were damaged. Furthermore, the metabolomics results showed that 11 metabolites in serum and 8 metabolites in liver were differential metabolites for NCTD hepatotoxicity. Four metabolic pathways including the sphingolipid metabolism, purine metabolism, arachidonic acid metabolism, and glycerophospholipid metabolism were the key metabolic pathways related to NCTD hepatotoxicity.The metabolomics analysis in this study reveal new clues on the hepatotoxicity mechanism of NCTD in rats. These findings have potential applications in the toxicity study of NCTD.
Guangzhi Li,Junchi Wang,Xiaojin Li,Jianguo Xu,Zhao Zhang,Jianyong Si 대한약학회 2018 Archives of Pharmacal Research Vol.41 No.6
20-Z auraptene (1) is a synthesized monoterpenecoumarin with anticancer activity against human gastriccancer cells. In order to find new potential anticancer agent,Mucor polymorphosporus was used to transform cis-auraptene. Four new terpene coumarins with notable changesin the skeletal backbone, 20-Z auraptene A-D (2–5), wereobtained and evaluated for their antiproliferative effectsagainst human normal gastric epithelium cells and humangastric cancer cells. These new compounds showed selectivecytotoxic activity against MGC-803 cells with IC50values from 0.78 ± 0.13 to 10.78 ± 1.83 lM and thetherapeutic index could also be significantly improved(TI = 59.0) compared with that of 1 (TI = 5.5). Thestructures of these metabolites were elucidated throughextensive spectroscopic methods, and the possible biotransformationpathway of 1 by Mucor polymorphosporuswas also proposed. Furthermore, the mechanism of theantiproliferative effects against MGC-803 cells of the mostpotent compound, 20-Z auraptene A (2), was characterized. Annexin V/PI staining and abnormal expression of apoptosis-related protein suggested that compound 2 inducesapoptosis in gastric cancer MGC-803 cells. Therefore, it ispossible that compound 2 has the potential to be applied ingastric cancer therapy.