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Reclassification of Xanthomonas Isolates Causing Bacterial Leaf Spot of Euphorbia pulcherrima
Bin Li,Rongrong Yu,Yu Shi,Ting Su,Fang Wang,Muhammad Ibrahim,Guanlin Xie,Yanli Wang,Guochang Sun 한국식물병리학회 2011 Plant Pathology Journal Vol.27 No.4
Bacterial leaf spot of Euphorbia pulcherrima has been reported in many countries. Characterization by polyphasic approaches indicated that the isolates from India, USA and New Zealand could be distinguished based on rep-PCR profiles and gyrB phylogenies, while the Chinese isolates should be ascribed to Xanthomonas axonopodis pv. poinsettiicola.
Reclassification of Xanthomonas Isolates Causing Bacterial Leaf Spot of Euphorbia pulcherrima
Li, Bin,Yu, Rongrong,Shi, Yu,Su, Ting,Wang, Fang,Ibrahim, Muhammad,Xie, Guanlin,Wang, Yanli,Sun, Guochang The Korean Society of Plant Pathology 2011 Plant Pathology Journal Vol.27 No.4
Bacterial leaf spot of Euphorbia pulcherrima has been reported in many countries. Characterization by polyphasic approaches indicated that the isolates from India, USA and New Zealand could be distinguished based on rep-PCR profiles and gyrB phylogenies, while the Chinese isolates should be ascribed to Xanthomonas axonopodis pv. poinsettiicola.
Caihong Qin,Rongrong Liu,Chaochao Jiang,Mengke Guo,Rui Yu,Jiayu Huang,Wenwen Bai,Xiaoqing Dang 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.122 No.-
Non-thermal plasma coupling Fe2+ containing liquid-phase catalysis (NTP-LC/ Fe2+) can effectively reusethe byproduct ozone (O3) of NTP in LC/ Fe2+ for volatile organic compounds (VOCs) degradation. However,the low recycling rate of Fe2+/Fe3+ resulted in poor catalytic effect of the coupling system. In this study,the chelator protocatechuic acid (PCA) was added to LC/Fe2+ to enhance the removal of representativeVOC acetone. The results showed that adding PCA increased the acetone removal efficiency to 91% andkept O3 100% removed within 180 min. The mechanism of PCA-enhanced acetone degradation was thatPCA accelerated the Fe3+/Fe2+ cycle by generating PCA-Fe3+ chelates, which prevented the Fe3+ from precipitationand promoted the production of OH and O2 - for acetone oxidation.
Long Yan,Ying Yu,Kaijiang Kang,Zhikai Hou,Min Wan,Weilun Fu,Rongrong Cui,Yongjun Wang,Zhongrong Miao,Xin Lou,Ning Ma 대한신경과학회 2022 Journal of Clinical Neurology Vol.18 No.5
Background and Purpose Intracranial vertebrobasilar atherosclerotic stenosis (IVBAS) is a major cause of posterior circulation stroke. Some patients suffer from stroke recurrence despite receiving medical treatment. This study aimed to determine the prognostic value of a new score for the posterior communicating artery and the P1 segment of the posterior cerebral artery (PCoA-P1) for predicting stroke recurrence in IVBAS. Methods We retrospectively enrolled patients with severe IVBAS (70%–99%). According to the number of stroke recurrences, patients were divided into no-recurrence, single-recurrence, and multiple-recurrences groups. We developed a new 5-point grading scale, with the PCoA-P1 score ranging from 0 to 4 based on magnetic resonance angiography, in which primary collaterals were dichotomized into good (2–4 points) and poor (0 or 1 point). Stroke recurrences after the index stroke were recorded. Patients who did not experience stroke recurrence were compared with those who experienced single or multiple stroke recurrences. Results From January 2012 to December 2019, 176 patients were enrolled, of which 116 (65.9%) had no stroke recurrence, 35 (19.9%) had a single stroke recurrence, and 25 (14.2%) had multiple stroke recurrences. Patients with single stroke recurrence (odds ratio [OR]= 4.134, 95% confidence interval [CI]=1.822–9.380, p=0.001) and multiple stroke recurrences (OR=6.894, 95% CI=2.489–19.092, p<0.001) were more likely to have poor primary collaterals than those with no stroke recurrence. Conclusions The new PCoA-P1 score appears to provide improve predictions of stroke recurrence in patients with IVBAS
Lei Zhang,Fengqiong Yu,Qian Hu,Yuxi Qiao,Rongrong Xuan,Gongjun Ji,Chunyan Zhu,Chunlan Cai,Kai Wang 대한신경정신의학회 2020 PSYCHIATRY INVESTIGATION Vol.17 No.9
Objective Attentional biases toward emotional scenes may represent vulnerability and maintenance factors in depression. Antidepressant therapy may improve cognitive function and reduce depression, and is considered as the mechanism of action of antidepressants. Therefore, we conducted an eye-tracking test to examine whether selective serotonin re-uptake inhibitor (SSRI) antidepressants can reduce negative attentional biases and elicit clinical responses in depression. Methods Twenty first-episode depressive patients freely viewed three types of pictures that depicted different emotional scenes (i.e., positive-control, neutral-control, and negative-control) for 4,000 ms while their eye movements were monitored. The attentional bias to different emotional scenes was assessed before and after eight weeks of SSRI treatment using the eye-tracking method. The control group included a group of healthy individuals. Results The results revealed that first-episode depressive patients oriented their gaze more frequently to negative images and less to happy images, compared to controls. Importantly, the attentional bias in depressive patients was regulated after eight weeks of SSRI treatment. Patients showed an increased tendency to fixate on positive images and a decreased tendency to focus on negative images. Conclusion This suggests that SSRI antidepressants decrease vulnerability to negative images, while having an effect on attention in respect to positive images.
( Lixiang Chen ),( Cong Wang ),( Shun Li ),( Xin Yu ),( Xue Liu ),( Rongrong Ren ),( Wenwen Liu ),( Xiaojing Zhou ),( Xiaonan Zhang ),( Xiaohui Zhou ) 한국미생물 · 생명공학회 2016 Journal of microbiology and biotechnology Vol.26 No.4
Chlamydiae, obligate intracellular bacteria, are associated with a variety of human diseases. The chlamydial life cycle undergoes a biphasic development: replicative reticulate bodies (RBs) phase and infectious elementary bodies (EBs) phase. At the end of the chlamydial intracellular life cycle, EBs have to be released to the surrounded cells. Therefore, the interactions between Chlamydiae and cell death pathways could greatly influence the outcomes of Chlamydia infection. However, the underlying molecular mechanisms remain elusive. Here, we investigated host cell death after Chlamydia infection in vitro, in L929 cells, and showed that Chlamydia infection induces cell necrosis, as detected by the propidium iodide (PI)-Annexin V double-staining flow-cytometric assay and Lactate dehydrogenase (LDH) release assay. The production of reactive oxygen species (ROS), an important factor in induction of necrosis, was increased after Chlamydia infection, and inhibition of ROS with specific pharmacological inhibitors, diphenylene iodonium (DPI) or butylated hydroxyanisole (BHA), led to significant suppression of necrosis. Interestingly, live-cell imaging revealed that Chlamydia infection induced lysosome membrane permeabilization (LMP). When an inhibitor upstream of LMP, CA-074-Me, was added to cells, the production of ROS was reduced with concomitant inhibition of necrosis. Taken together, our results indicate that Chlamydia infection elicits the production of ROS, which is dependent on LMP at least partially, followed by induction of host-cell necrosis. To our best knowledge, this is the first live-cell-imaging observation of LMP post Chlamydia infection and report on the link of LMP to ROS to necrosis during Chlamydia infection.
Bin Li,Yuan Fang,Guoqing Zhang,Rongrong Yu,Miaomiao Lou,Guanlin Xie,Yanli Wang,Guochang Sun 한국식물병리학회 2010 Plant Pathology Journal Vol.26 No.3
The Burkholderia cepacia complex isolates causing bacterial fruit rot of apricot were characterized by speciesspecific PCR tests, recA-HaeIII restriction fragment length polymorphism (RFLP) assays, rep-PCR genomic fingerprinting, recA gene sequencing, and multilocus sequence typing (MLST) analysis. Results indicated that the isolates Bca 0901 and Bca 0902 gave positive amplifications with primers specific for B. vietnamiensis while the two bacterial isolates showed different recARFLP and rep-PCR profiles from those of B. vietnamiensis strains. In addition, the two bacterial isolates had a higher proteolytic activity compared with that of the non-pathogenic B. vietnamiensis strains while no cblA and esmR marker genes were detected for the two bacterial isolates and B. vietnamiensis strains. The two bacterial isolates were identified as Burkholderia seminalis based on recA gene sequence analysis and MLST analysis. Overall, this is the first characterization of B. seminalis that cause bacterial fruit rot of apricot.
Li, Bin,Fang, Yuan,Zhang, Guoqing,Yu, Rongrong,Lou, Miaomiao,Xie, Guanlin,Wang, Yanli,Sun, Guochang The Korean Society of Plant Pathology 2010 Plant Pathology Journal Vol.26 No.3
The Burkholderia cepacia complex isolates causing bacterial fruit rot of apricot were characterized by speciesspecific PCR tests, recA-HaeIII restriction fragment length polymorphism (RFLP) assays, rep-PCR genomic fingerprinting, recA gene sequencing, and multilocus sequence typing (MLST) analysis. Results indicated that the isolates Bca 0901 and Bca 0902 gave positive amplifications with primers specific for B. vietnamiensis while the two bacterial isolates showed different recA-RFLP and rep-PCR profiles from those of B. vietnamiensis strains. In addition, the two bacterial isolates had a higher proteolytic activity compared with that of the non-pathogenic B. vietnamiensis strains while no cblA and esmR marker genes were detected for the two bacterial isolates and B. vietnamiensis strains. The two bacterial isolates were identified as Burkholderia seminalis based on recA gene sequence analysis and MLST analysis. Overall, this is the first characterization of B. seminalis that cause bacterial fruit rot of apricot.
Average Modeling and Control of Module Multilevel Converter
Zhang, GuoJu,Chen, Yao,Qi, Lisa,Yu, Rongrong,Pan, Jiuping The Korean Institute of Electrical Engineers 2014 The Journal of International Council on Electrical Vol.4 No.2
Modular Multilevel Converter (MMC) has presents great potential in high power quality, low operation loss, scalability and high reliability, which make MMC a good choice for DC transmission, MV drive and other HV or MV applications. This paper describes the average modeling and control of MMC. Firstly, the operation principles of MMC are analyzed, based on which the average MMC model is deduced. Secondly, the control methods for DC voltage control, circulating current suppression, and capacitor voltage balancing, etc are developed. Finally, the effectiveness of the proposed average model is verified by comparing the simulation results of an MVDC distribution system using detailed MMC models. The correctness of the designed control methods also demonstrated through simulation. It is also proven to be feasible of using MMC in MVDC applications.
CDH17 nanobodies facilitate rapid imaging of gastric cancer and efficient delivery of immunotoxin
Jingbo Ma,Xiaolong Xu,Chunjin Fu,Peng Xia,Ming Tian,Liuhai Zheng,Kun Chen,Xiaolian Liu,Yilei Li,Le Yu,Qinchang Zhu,Yangyang Yu,Rongrong Fan,Haibo Jiang,Zhifen Li,Chuanbin Yang,Chengchao Xu,Ying Long,J 한국생체재료학회 2022 생체재료학회지 Vol.26 No.4
Background: It is highly desirable to develop new therapeutic strategies for gastric cancer given the low survival rate despite improvement in the past decades. Cadherin 17 (CDH17) is a membrane protein highly expressed in cancers of digestive system. Nanobody represents a novel antibody format for cancer targeted imaging and drug delivery. Nanobody targeting CHD17 as an imaging probe and a delivery vehicle of toxin remains to be explored for its theragnostic potential in gastric cancer. Methods: Naïve nanobody phage library was screened against CDH17 Domain 1-3 and identified nanobodies were extensively characterized with various assays. Nanobodies labeled with imaging probe were tested in vitro and in vivo for gastric cancer detection. A CDH17 Nanobody fused with toxin PE38 was evaluated for gastric cancer inhibition in vitro and in vivo. Results: Two nanobodies (A1 and E8) against human CDH17 with high affinity and high specificity were successfully obtained. These nanobodies could specifically bind to CDH17 protein and CDH17-positive gastric cancer cells. E8 nanobody as a lead was extensively determined for tumor imaging and drug delivery. It could efficiently co-localize with CDH17-positive gastric cancer cells in zebrafish embryos and rapidly visualize the tumor mass in mice within 3 h when conjugated with imaging dyes. E8 nanobody fused with toxin PE38 showed excellent anti-tumor effect and remarkably improved the mice survival in cell-derived (CDX) and patient-derived xenograft (PDX) models. The immunotoxin also enhanced the anti-tumor effect of clinical drug 5-Fluorouracil. Conclusions: The study presents a novel imaging and drug delivery strategy by targeting CDH17. CDH17 nanobodybased immunotoxin is potentially a promising therapeutic modality for clinical translation against gastric cancer.