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Wei-Qin Cai,Feng-Jun Zhang,Ying-Rui Wang,Dong-Cai Li 한국화학공학회 2022 Korean Journal of Chemical Engineering Vol.39 No.5
The construction of late-model non-noble metal catalysts with above average performance and stability isthe best choice to implement visible light decomposition of water for hydrogen production and solve the problem ofclean energy. Herein, novel ZnS nanoparticles (ZnS NPs) grown in situ on the surface of porous Ni@Trimellitic acid(Ni-TA) microspheres were successfully synthesized. The structure, optical properties, element composition and othersof ZnS/Ni-TA composites were systematically analyzed by experimental characterization. The experimental resultsshowed that pure ZnS showed very weak photocatalytic performance. However, the photocatalytic performance wasgreatly increased with the addition of Ni-TA. The yield of the best sample (3% ZnS/Ni-TA) reached 1,098 mol/g/h,about 12 times higher than that of ZnS. Among them, Ni-TA not only can be used as the main body of exotic metalnanoparticles, but also the porous channels can prevent the agglomeration of nanoparticles. The enhanced H2 yield ismainly attributed to the resulting tight interface contact and well-matched band position which are conducive to effectivecarrier separation; moreover, the electrons quickly diverted to the exposed edge of Ni-TA for reducing to producehydrogen. The combination of inorganic and new organic semiconductors provides an idea for hydrogen productionunder visible light.
Rui Qian,Yin Zheng‐Zhi,Cai Wenrong,Li Junyao,Wu Datong,Kong Yong 대한화학회 2022 Bulletin of the Korean Chemical Society Vol.43 No.5
A simple drug controlled delivery system is facilely designed for pH-responsive delivery of methotrexate (MTX), an anticancer drug. Aminated mesoporous silica nanoparticles (AMSNs) were first synthesized for the loading of MTX, and then the MTX-loaded AMSN (AMSN-MTX) was encapsulated with hyaluronic acid (HA) through electrostatic attractions. Successful preparation of the HAencapsulated AMSN-MTX (AMSN-MTX-HA) is confirmed by different characterizations such as scanning electron microscopy, Fourier transform infrared, x-ray diffraction, and so on. Because the protonation/deprotonation of HA is closely related to pH, the electrostatic interactions between HA and AMSN depend closely on the pH of the medium and thus pH-responsive delivery of MTX is achieved. The release kinetic data of MTX from the carrier fit well to Higuchi and Korsmeyer-Peppas models. Cell experiments indicate that the developed AMSN-MTX-HA displays high inhibitory effect on hepatoma (SMMC-7721) cells while the drug-free carrier of AMSN-HA has good biocompatibility.
( De Cai Jin ),( Ren Xing Liang ),( Qin Yun Dai ),( Rui Yong Zhang ),( Xue Liu Wu ),( Wei Liang Chao ) 한국미생물 · 생명공학회 2010 Journal of microbiology and biotechnology Vol.20 No.10
Rhodococcus sp. JDC-11, capable of utilizing di-n-butyl phthalate (DBP) as the sole source of carbon and energy, was isolated from sewage sludge and confirmed mainly based on 16S rRNA gene sequence analysis. The optimum pH, temperature, and agitation rate for DBP degradation by Rhodococcus sp. JDC-11 were 8.0, 30oC, and 175 rpm, respectively. In addition, low concentrations of glucose were found to inhibit the degradation of DBP, whereas high concentrations of glucose increased its degradation. Meanwhile, a substrate utilization test showed that JDC- 11 was also able to utilize other phthalates. The major metabolites of DBP degradation were identified as monobutyl phthalate and phthalic acid by gas chromatographymass spectrometry, allowing speculation on the tentative metabolic pathway of DBP degradation by Rhodococcus sp. JDC-11. Using a set of new degenerate primers, a partial sequence of the 3,4-phthalate dioxygenase gene was obtained from JDC-11. Moreover, a sequence analysis revealed that the phthalate dioxygenase gene of JDC-11 was highly homologous to the large subunit of the phthalate dioxygenase from Rhodococcus coprophilus strain G9.
Xiao-Rui Xu,Ming-Ming Zhu,Liang-Liang Li,Guang-Cai Zhang,Ye Zheng,Ting Li,Shou-Hui Sun 한국응용곤충학회 2015 Journal of Asia-Pacific Entomology Vol.18 No.1
The fallwebworm, Hyphantria cunea (Drury) (Lepidoptera: Arctiidae), is an invasive and important pest in China. Understanding the physiological–biochemical characteristics of the overwintering pupae is essential for its cold tolerance and potential distribution in the northeast of China. Results indicated that the supercooling point (SCP) of H. cunea overwintering pupae varied significantly among Jilin city (43°N, 126°E), Jilin Province, Shenyang (41.8°N, 123.4°E), Liaoning Province and Yingkou (40.39°N, 122.13°E), Liaoning Province. The average SCP in Jilin was the lowest (−23.49 ± 0.46 °C) in those of three areas. The water content in overwintering pupae had a significant positive correlation with the SCP (R = 0.848,P = 0.03). Contents of alanine (ALA) (26.00%), lysine (LYS) (30.51%) and arginine (ARG) (22.88%) in the overwintering pupae's hemolymph were higher than others. During the overwintering, the fat content in pupae's bodies decreased gradually. Analysis of variance (ANOVA) indicated that the content of trehalose in the body of H. cunea was remarkably different (P= 0.007) month by month, with the maximum in March (2.88 mg·mL−1) and the minimum (0.40 mg·mL−1) in November. Pearson's correlation test indicated that SCP had a significant negative correlation with the SOD enzyme activity (R = −0.850; P = 0.008). Thermal hysteresis activity (THA) of hemolymph was 0.68°C and 0.7–0.8°C for H. cunea pupae and larva, respectively, using differential scanning calorimetry, which suggests that the H. cunea can improve their cold tolerance through producing antifreeze proteins. These results could help us to predict the distribution of the H. cunea in the northeast of China.
Mai, Rui-Qin,Huang, Bo,Shen, Ling,Zhang, Guo-Hong,Hong, Liang-Li,Cai, Ying-Mu Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.12
Infection with human papillomavirus (HPV) could affect genesis of both cervical and esophageal cancers. The type-specific distribution of HPV in cervical cytology abnormalities of women has remained unclear in Shantou, an esophageal cancer high-incidence area of China. Data from 22,617 women who were subjected to cervical HPV DNA testing with simultaneous cervical cytological examination during 2009-2013 were therefore here retrospectively evaluated in a hospital-based study. Overall, 16.2% (3,584/22,114)of women with normal cytology were HR-HPV positive, with HPV-52 (4.07%) as the most common type followed by -16 (3.63%), and -58 (2.46%). Prevalence of HR-HPV was 50.3% (253/503) in women with cervical cytological abnormalities, of which in ASC-H 71.4%, ASC-US 39.1%, HSIL 80.3% and LSIL 73.7%. HPV-58 (14.12%) was the most common type for all cervical cytological abnormalities, followed by HPV-16 (13.72%), and -52 (12.72%), while the more common HPV-16 type in ASC-H (42.9%) and HSIL (36.1%), HPV-52 and -58 were the most common types for ASC-US (10.3%) and LSIL (25%), respectively. Multiple HPV co-infections were identified in 33.2% (84/253) cytology abnormalities with positive HR-HPV, and the highest prevalence of HPV-58/16 combination in HSIL (28.6%, 6/21) was observed. Our data indicated a relative high prevalence of HPV-58 and -52 in women with cervical cytological abnormalities, which should be considered in the development of next-generation vaccines for Shantou.