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Jing Chen,Qifang Ren,Chunshan Xu,Bin Chen,Shaohua Chen,Yi Ding,Zhen Jin,Wanmi Guo,Xinyu Jia 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.123 No.-
In this study, Ag2O/BiVO4/diatomite composite with p-n heterojunction structure was synthesized bysimple hydrothermal method with diatomite as carrier. It was found that under the action of hydrogenperoxide (H2O2), the imidacloprid (IMD) could be effectively degraded by the composite. Systemic evaluationswas conducted on effects of pH value, catalyst dosage, H2O2 concentration, initial IMD concentration,and anion on how effeciently this new photocatalytic composite can degrade IMD. The results showthat the p-n heterojunction formed between the two contact surfaces of Ag2O nanoparticle and BiVO4promotes the charge transfer between the interfaces, inhibits recombination of electrons and holes,and thus significantly improves the catalytic performance. The stability and reusability of Ag2O/BiVO4/diatomite composites were tested with ICP experiment and cyclic experiment. Active substancecapture experiment and ESR reveal the photocatalytic reaction mechanism and confirm that superoxideradical (O2), hydroxyl radical (OH), and h+ can promote the degradation of IMD. The degradation productsand the intermediates of IMD were identified through LC-MS, on a basis of which the possible transformationpathway was proposed. In situ synthesis of p-type Ag2O and n-type BiVO4 heterojunctioncomposites has opened a new direction for photocatalytic degradation of organic pollutants.
Feng Jian,Ren Jian,Fan Ren-Yi,Lei Jing 보안공학연구지원센터 2015 International Journal of u- and e- Service, Scienc Vol.8 No.7
Mobile application for campus is an integral part of the construction of wisdom campus. CampusService - a campus information service system is designed, and is comprised of three parts, Android client, Web client and server, which are all designed according to MVC pattern. C/S architecture is adopted between the Android client and the server, B/S architecture is adopted between the Web client and the server, and JSON is used as a unified data interface for accomplishing the interactions. The architectures of three parts are described, and key technologies are represented, including database access optimization, Android display, transaction management and authentication, among which database access optimization technology has two respects: using C3P0 to maintain connection pool and prefetching data based on their popularity. According to testing, the system implements functions of user management, intramural announcements, interaction with friends, activity participation, and campus maps, and it has good performance. The system provides an efficient platform for real-time communication among teachers, students and school authority.
Zhang, Yalong,Yi, Min,Ren, Jing,Zhai, Maolin,Ha, Hongfei The Polymer Society of Korea 2003 Macromolecular Research Vol.11 No.3
The dependence of electrical conductivity on concentrations of diallyldimethylammonium chloride (DADMAC) monomer, linear poly(DADMAC) and their mixture monomer/poly(DADMAC) in dilute aqueous solution exhibits a linear relationship. It was possible to calculate conversion of DADMAC polymerization by measuring its electric conductivity. Although the electrical conductivity of the poly(DADMAC) solution decreased with increasing its molecular weight, in the process of UV or ionizing radiation polymerization the molecular weight of the polymers could be kept constant in the case of fixed temperature, UV-luminous intensity or dose rate. Based on the method mentioned above, the kinetics of UV induced polymerization of DADMAC in aqueous solution was studied; the overall activation energy of polymerization of DADMAC in the water phase was calculated to be 18.8 kJ mol$^{-1}$ . ${\gamma}$-Radiation-induced polymerization of DADMAC in aqueous solution as a function of absorbed dose was studied as well. The conversion of DADMAC increased quickly with dose before 30 kGy and then increased slowly. The experimental data of both UV- and ${\gamma}$-induced polymerization were verified to be reliable by inverted ultracentrifugation method.
폴리(스티렌-이소부틸렌-스티렌) 삼중블록 공중합체의 합성, 분석 및 혈액적합성
Wen Li Guo,Ping Ren,Yi Bo Wu,Shu Xin Li,Jing Mao,Fei Xiao,Kang Li 한국고분자학회 2011 폴리머 Vol.35 No.1
The synthesis of well-defined poly(styrene-b-isobutylene-b-styrene) (SIBS) triblock copolymers was accomplished by cationic sequential block copolymerization of isobutylene (IB) with styrene (St) using 1,4-di(2-chloro-2-propyl)benzene (DCC)/TiCl4 /2,6-di-tert-butylpyridine(DtBP) as an initiating system in methyl chloride (CH3Cl)/methylcyclohexane(MeChx) (50/50 v/v) solvent mixture at -80 ℃. The triblock copolymers exhibited excellent thermoplastic and elastomeric characteristics. Tensile strengths and Shore hardness increased with increasing polystyrene (PS) content, while elongation at break decreased. The blood-compatibility of SIBS was assessed by SEM observation of the platelet adhesion, blood clotting time and haemolysis ratio. The haemolysis ratios were below 5% which met the medical materials standard. The platelet adhesion test further indicated that SIBS block copolymers had a good blood compatibility.
Microwave absorption and photocatalytic activity of MgxZn1−x ferrite/diatomite composites
Guo Wanmi,Wang Sulei,Ren Qifang,Jin Zhen,Ding Yi,Xiong Chun-Yu,Li Jinpeng,Chen Jing,Zhu Yuelei,오원춘 한국세라믹학회 2022 한국세라믹학회지 Vol.59 No.2
Mg x Zn 1−x ferrite/diatomite composites were synthesized by a two-step combination process (hydrothermal method and mechanical mixing method). The products were characterized by X-ray diff raction (XRD), scanning electron microscopy (SEM), Fourier transform infrared (FTIR), UV–visible absorption spectrum (UV–Vis), X-ray photoelectron spectroscope (XPS), and microwave vector network analyzer. The photocatalytic results showed that the degradation rate of Rhodamine B (RhB) was 50–90% after 90 min of visible light. At 2–18 GHz frequency, when the Mg–Zn ratio increases to 0.8, the refl ection loss of a single MgxZn 1−x ferrite reaches − 7.23 dB at 8.75 GHz frequency in 3.5 mm thickness while the ratio is 0.2, the refl ection loss at 10.23 GHz reaches − 4.07 dB. The photocatalytic performance of Mgx Zn 1−x ferrite /diatomite composite for the degradation of RhB and its microwave absorption performance as absorbent are studied. The importance of developing new functional coatings to improve human environment is discussed.
He, Jian-Rong,Xi, Jing,Ren, Ze-Fang,Qin, Han,Zhang, Ying,Zeng, Yi-Xin,Mo, Hao-Yuan,Jia, Wei-Hua Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.12
Purpose: Complement receptor 1 (CR1) is induced by Epstein-Barr virus (EBV) and may be a potential biomarker of nasopharyngeal carcinoma (NPC). We conducted the present study to evaluate the association of CR1 expression with clinicopathological features and prognosis of NPC. Methods: We enrolled 145 NPC patients and 110 controls. Expression levels of CR1 in peripheral blood mononuclear cells (PBMCs) were detected using quantitative real-time PCR and associations with clinicopathological features and prognosis were examined. Results: CR1 levels in the NPC group [3.54 (3.34, 3.79)] were slightly higher than those in the controls [3.33 (3.20, 3.47)] (P<0.001). Increased CR1 expression was associated with histology classification (type III vs. type II, P=0.002), advanced clinical stage (P=0.003), high T stage (P=0.017), and poor overall survival (HR, 4.89; 95% CI, 1.23-19.42; P=0.024). However, there were no statistically significant differences in CR1 expression among N or M stages. Conclusion: These findings indicate that CR1 expression in PBMCs may be a new biomarker for prognosis of NPC and a potential therapeutic target.
Xiao-Dan Yue,Jing-Yu Wang,Xin-Rong Zhang,Ju-Hong Yang,Chun-Yan Shan,Miao-Yan Zheng,Hui-Zhu Ren,Yi Zhang,Shao-Hua Yang,Zhen-Hong Guo,Bai Chang,Bao-Cheng Chang 대한의학회 2017 Journal of Korean medical science Vol.32 No.4
Sodium glucose co-transporter 2 (SGLT-2) inhibitors are newly developed but promising medicine for type 2 diabetes. However, patients with a different renal threshold for glucose excretion (RTG) may have a different reaction to this medicine. Therefore, the objective of this study was to investigate the characteristics of RTG and its impact factors in patients with type 2 diabetes mellitus (T2DM). The clinical and laboratory data of 36 healthy individuals and 168 in-hospital patients with T2DM were collected and analyzed, RTG was calculated using blood glucose (BG) measured by dynamic BG monitoring, urinary glucose excretion (UGE) and estimated glomerular filtration rate (eGFR). The characteristics of RTG were investigated. The risk factors for high RTG were analyzed using non-conditional logistic regression analysis. Our results found that RTG of the T2DM group was higher than that of the healthy individuals (P < 0.05); and 22.22% from the healthy individuals group but 58.33% from the T2DM group had high RTG. Age, duration of diabetes, body mass index (BMI), and homeostasis model assessment insulin resistance index (HOMA-IR) were independently associated with high RTG (P < 0.05). Further stratified analysis revealed that RTG in T2DM patients increased with age, duration of diabetes, and BMI. In conclusion, RTG is increased in patients with T2DM, especially in those with longer diabetic duration, higher BMI, and those who are older. Therefore, these patients may be more sensitive to SGLT-2 inhibitors.