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Nuclide assignment for an isolated band observed in the 10B + 114Cd reaction
Yang Qing-Yu,Song Li-Na,Ma Ying-Jun,Yang Dong,Ma Ke-Yan,Wu Xiao-Guang,Zheng Yun,Li Cong-Bo 한국물리학회 2021 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.79 No.3
Three experiments based on the nuclear reactions 14N + 110Pd, 10B + 114Cd and 11B + 114Cd were performed. Coincidences between γ-rays emitted from these reactions were measured with the same detection array which consisted of 14 HPGe detectors. A new band structure was identified using an offline analysis of coincidence data. Because of the isomeric nature of the bandhead, the new band cannot be connected to any known state in any residual nuclei of the used reactions. To assign it to a specific nucleus, we evaluated the experimental population intensities of various known bands in known residual nuclei and investigated the entrance channel effects in the three different experiments. The population intensity patterns of the known bands were observed to exhibit regular systematics. Based on such experimental systematics, we suggest that the most reasonable nuclide assignment for the new band is the 120I nucleus.
( Qing-bo Yu ),( Qing Wang ),( Xue-xin Yan ),( Tian-liang Yang ),( Meng Yao ),( Kai Zhou ),( Xin-lei Huang ),( Jian-ping Chen ) 대한지질공학회 2019 대한지질공학회 학술발표회논문집 Vol.2019 No.2
The land subsidence poses a nonnegligible threat to production and life, especially in dredger fill area. The essence of land subsidence is soil consolidation. Better evaluation of the degree of soil consolidation presents significant progress for predicting land subsidence. In this study, SBAS-InSAR was conducted to Chenjia town, the typical dredger fill area in Chongming East Shoal, Shanghai. SAR data and precise Orbit data were collected from the ESA satellite Sentinel-1 in recent 2 years with approximately one month intervals. the relationship curve of cumulative subsidence with time is obtained after processing. On this basis, the final settlement and soil consolidation can be estimated by applying the method proposed by Professor Huang Wenxi of China. The results show that: The subsidence rate is faster than 20 mm/a; The estimated final settlement is 26.6-52.9 mm, and the corresponding consolidation degree is 54.6 % on average; Soil mass has not yet been fully consolidated and it still takes a long time to achieve stability. In conclusion, the method proposed in this study can provide a clearer understanding of the consolidation degree, and a new reference for the evaluation and prevention of land subsidence. Future research will focus on longer monitoring time to enrich and improve the method. Acknowledgements This work was financially supported by National Nature Science Foundation of China (Grant No: 41820104001, 41430642 and 41627801) and the Key Laboratory of Land Subsidence Monitoring and Prevention, Ministry of Land and Resources (Grant No. KLLSMP201801).
Jia-Yu Lv,Ning-Ning Zhang,Ya-Wei Du,Ying Wu,Tian-Qiang Song,Ya-Min Zhang,Yan Qu,Yu-Xin Liu,Jie Gu,Ze-Yu Wang,Yi-Bo Qiu,Bing Yang,Da-Zhi Tian,Qing-Jun Guo,Li Zhang,Ji-San Sun,Yan Xie,Zheng-Lu Wang,Xin 연세대학교의과대학 2021 Yonsei medical journal Vol.62 No.1
Purpose: The aim of this study was to compare the efficacy of liver transplantation (LT) and liver resection (LR) for hepatocellularcarcinoma (HCC) patients with portal vein tumor thrombus (PVTT) and to investigate risk factors affecting prognosis. Materials and Methods: A total of 94 HCC patients with PVTT type I (segmental PVTT) and PVTT type II (lobar PVTT) were involvedand divided into LR (n=47) and LT groups (n=47). Recurrence-free survival (RFS) and overall survival (OS) were comparedbefore and after inverse probability of treatment weighting (IPTW). Prognostic factors for RFS and OS were explored. Results: Two treatment groups were well-balanced using IPTW. In the entire cohort, LT provided a better prognosis than LR. Among patients with PVTT type I, RFS was better with LT (p=0.039); OS was not different significantly between LT and LR(p=0.093). In subgroup analysis of PVTT type I patients with α-fetoprotein (AFP) levels >200 ng/mL, LT elicited significantly longermedian RFS (18.0 months vs. 2.1 months, p=0.022) and relatively longer median OS time (23.6 months vs. 9.8 months, p=0.065). Among patients with PVTT type II, no significant differences in RFS and OS were found between LT and LR (p=0.115 and 0.335,respectively). Multivariate analyses showed treatment allocation (LR), tumor size (>5 cm), AFP and aspartate aminotransferase(AST) levels to be risk factors of RFS and treatment allocation (LR), AFP and AST as risk factors for OS. Conclusion: LT appeared to afford a better prognosis for HCC with PVTT type I than LR, especially in patients with AFP levels>200 ng/mL.
Two Androstane Derivatives from the Cultures of Fungus Marasmiellus ramealis (Bull.) Singer
Yang, Ning-Ning,Ma, Qing-Yun,Huang, Sheng-Zhuo,Dai, Hao-Fu,Guo, Zhi-Kai,Yu, Zhi-Fang,Zhao, You-Xing Korean Chemical Society 2014 Bulletin of the Korean Chemical Society Vol.35 No.11
A new androstane derivative, $4{\beta}$-methyl-15-oxa-$14{\beta}$-androstane-7-ene-$4{\alpha}$-carboxylic acid (1) and a known one $4{\beta}$-methyl-15-oxa-$14{\beta}$-androstane-7-ene-$4{\alpha}$-hydroxyl (2) were isolated from the EtOAc extract of the cultures of the fungus Marasmiellus ramealis (Bull.) Singer. Their structures were elucidated on the basis of 1D and 2D NMR as well as MS spectroscopic data analysis. The inhibitory activity of two isolates against acetylcholinesterase (AChE) revealed that compound 1 exhibited definitely inhibitory activity.
Synthesis, Antibacterial Activity, and Structure–Activity Relationship of Fusaric Acid Analogs
Qing-Yan Zhang,Yang Fei‐Yu,Liao Shang‐Gao,Wang Bing,Li Rui,Dong Yong‐Xi,Zhou Meng,Yang Yuan‐Yong,Xu Guo‐Bo 대한화학회 2021 Bulletin of the Korean Chemical Society Vol.42 No.4
Forty-one fusaric acid analogs possessing a pyridine carboxylic acid scaffold have been synthesized. The antibacterial activity results demonstrated that compounds 5b, 7b, 8c, and 8d displayed strong antibacterial activities against Staphylococcus aureus ATCC25923 with minimum inhibitory concentrations (MICs) of 4–16 μg/mL. Molecular docking study indicated that these compounds have strong hydrogen-bonding interactions with TyrRS. Meanwhile, 8c and 8d showed promising antibacterial activities against Pseudomonas aeruginosa ATCC9027. Compound 4 exhibited pronounced antibacterial activities against a clinically isolated multidrug-resistant strain of Escherichia coli (MIC: 64 μg/mL as compared 64 μg/mL of levofloxacin and 1024 μg/mL of ceftriaxone sodium). Moreover, compound 17e displayed strong synergistic antibacterial effect with levofloxacin against the multidrug-resistant strain, decreasing the MIC value of levofloxacin to 1/16 of its original MIC. No obvious cytotoxic activities against LO2 was observed for compounds 4, 5b, 8c, 8d, 17d, and 17e at 50 μM. The preliminary structure–activity relationship of fusaric acid analogs was also discussed.
Yang Liu,Guosong Chen,Yuerong Gao,Kefeng Fang,Qing Zhang,Qingqin Cao,Ling Qin,Yu Xing,Shuchai Su 한국원예학회 2021 원예과학기술지 Vol.39 No.4
Chinese chestnut (Castanea mollissima) is a woody plant species with important economic and ecological value and is widely cultivated for nut production. Due to its unique flowering structure, the identification of genes related to flower development is extremely important in Chinese chestnut, and MADS-box genes are directly involved in floral organ morphogenesis. In this study, we report a MADS-box gene family in Chinese chestnut. According to their gene structure and phylogenetic trees, 53 CmMADS proteins were identified and clustered into five groups in Chinese chestnut. The MIKC<SUP>C</SUP> group was further divided into 12 subgroups, and the BS subgroup was not found in Chinese chestnut. The classification and motif composition of Chinese chestnut MADS proteins were also analyzed. Additionally, we evaluated the expression of all the MADS-box genes in floral organs by quantitative real-time PCR. Overall, most of the type II genes had higher expression levels in the floral organs compared with leaves and cotyledons. These results provide valuable information for future studies of the regulation of MADS-box genes in Chinese chestnut during flower development.
Yu, Qing,Liu, Shan-Ling,Wang, He,Shi, Gang,Yang, Pei,Chen, Xin-Lian Asian Pacific Journal of Cancer Prevention 2013 Asian Pacific journal of cancer prevention Vol.14 No.11
In cervical cancer, one of the most common malignant tumors in women worldwide, miR-126 has been reported to exhibit decreased expression. However, its role in cervical cancer cell proliferation and drug sensitivity has remained relatively unexplored. Here, we compared the expression of miR-126 in cervical cancer tissues (n = 20) with that in normal cervical tissue (n = 20) using quantitative RT-PCR. The viability of Siha cervical cancer cells was further measured by MTT assay after transfection with miR-126 mimic (Siha-miR-126 mimic) or microRNA mimic negative control (Siha-miR mimic NC) and after treatment with various concentrations of bleomycin (BLM). IC50s were calculated, and the survival rates (SRs) of Siha cells were calculated. miR-126 expression in cervical cancer tissue was significantly decreased compared with that in normal cervical tissue (P < 0.01). The relative SRs of Siha-miR-126 mimic cells were also significantly decreased compared with those of Siha-miR mimic NC cells at 24-96 h after transfection. The IC50 of BLM in Siha-miR-126 mimic cells ($50.3{\pm}2.02{\mu}g/mL$) was decreased compared with that in Siha-miR mimic NC cells ($70.5{\pm}4.33{\mu}g/mL$) at 48 h after transfection (P < 0.05). Finally, the SRs of Siha-miR-126 mimic cells were significantly lower than those of SihamiR mimic NC cells after cultured in medium containing 40 ${\mu}g/mL$ BLM for 24-96 h (P < 0.05). These results suggest that miR-126 is expressed at low levels in cervical cancer. Upregulation of miR-126 inhibited cervical cancer cell proliferation and enhanced the sensitivity to BLM. Thus, miR-126 may represent a novel approach to cervical cancer treatment.
Rock bridge fracture model and stability analysis of surrounding rock in underground cavern group
Yu, Song,Zhu, Wei-Shen,Yang, Wei-Min,Zhang, Dun-Fu,Ma, Qing-Song Techno-Press 2015 Structural Engineering and Mechanics, An Int'l Jou Vol.53 No.3
Many hydropower stations in southwest China are located in regions of brittle rock mass with high geo-stresses. Under these conditions deep fractured zones often occur in the sidewalls of the underground caverns of a power station. The theory and methods of fracture and damage mechanics are therefore adopted to study the phenomena. First a flexibility matrix is developed to describe initial geometric imperfections of a jointed rock mass. This model takes into account the area and orientation of the fractured surfaces of multiple joint sets, as well as spacing and density of joints. Using the assumption of the equivalent strain principle, a damage constitutive model is established based on the brittle fracture criterion. In addition the theory of fracture mechanics is applied to analyze the occurrence of secondary cracks during a cavern excavation. The failure criterion, for rock bridge coalescence and the damage evolution equation, has been derived and a new sub-program integrated into the FLAC-3D software. The model has then been applied to the stability analysis of an underground cavern group of a hydropower station in Sichuan province, China. The results of this method are compared with those obtained by using a conventional elasto-plastic model and splitting depth calculated by the splitting failure criterion proposed in a previous study. The results are also compared with the depth of the relaxation and fracture zone in the surrounding rock measured by field monitoring. The distribution of the splitting zone obtained both by the proposed model and by the field monitoring measurements are consistent to the validity of the theory developed herein.