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Structure-Preserving Mesh Simplification
( Zhuo Chen ),( Xiaobin Zheng ),( Tao Guan ) 한국인터넷정보학회 2020 KSII Transactions on Internet and Information Syst Vol.14 No.11
Mesh model generated from 3D reconstruction usually comes with lots of noise, which challenges the performance and robustness of mesh simplification approaches. To overcome this problem, we present a novel method for mesh simplification which could preserve structure and improve the accuracy. Our algorithm considers both the planar structures and linear features. In the preprocessing step, it automatically detects a set of planar structures through an iterative diffusion approach based on Region Seed Growing algorithm; then robust linear features of the mesh model are extracted by exploiting image information and planar structures jointly; finally we simplify the mesh model with plane constraint QEM and linear feature preserving strategies. The proposed method can overcome the known problem that current simplification methods usually degrade the structural characteristics, especially when the decimation is extreme. Our experimental results demonstrate that the proposed method, compared to other simplification algorithms, can effectively improve the quality of mesh and yield an increased robustness on noisy input mesh.
Chen Chen,Fu Xing,Zhuo Li,Ruohui Zhang 한국식물학회 2023 Journal of Plant Biology Vol.66 No.3
Invasive weeds that are poisonous to animals may affect the growth of neighboring palatable plants by releasing allelochemicals in degraded grasslands. Nitrogen (N) input may promote the growth of plants and alter the soil and plant nutrient content and their stoichiometric ratios. However, it is unclear how N addition mediates allelopathic effects of unpalatable weeds on adjacent plants. In this study, a greenhouse experiment was performed to detect the combined effects of root leachate of an invasive and unpalatable weed, Stellera chamaejasme, and N addition on the phenotypic traits and nutrient stoichiometry of a dominant grass, Leymus chinensis, in the Songnen grassland, China. The results showed that leachate addition had no significant effects on traits such as ramet number and biomass but significantly decreased total carbon (C) and the C:N ratio and increased total N in the shoots of L. chinensis. Furthermore, higher N addition changed the original allelopathic effects of the leachate by changing the soil pH, N and phosphorous availability, and microbial activity. This study emphasizes the significance of stoichiometry for detecting plant allelopathy. In particular, N deposition and plant allelopathy should be considered in assessing the relationships between invasive weeds and palatable plants in degraded grasslands.
Zhuo Chen,Guang Yang 한국유전학회 2010 Genes & Genomics Vol.32 No.4
The SINEs are short interspersed repetitive elements that propagate in eukaryotic genomes via transcription followed by reverse transcription. Recent genomic surveys have demonstrated that SINEs are active in shaping the architecture of genomes and therefore are powerful markers for studies of phylogeny and population biology. In the present study, a new protocol was developed to apply nonradioactive digoxigeninlabeling system into isolation of SINEs rapidly, safely, and efficiently. The application of this approach is illustrated with discovery of thirteen informative SINEs and a novel member of the t‐SINE family in the Omura’s whale (Balaenoptera omurai) and sperm whale (Physeter macrocephalus), which is the first record of t‐SINE in cetacean. Analysis of subfamilyspecific genetic variability and insertions/deletions strongly suggested the existence of some novel CHR‐2 SINE subfamilies in the cetacean genomes.
Study on the Isomerization of Maleic Acid to Fumaric Acid without Catalyst
Zhuo Gao,Wangmi Chen,Xiaoting Chen,Dali Wang,Shouzhi Yi 대한화학회 2018 Bulletin of the Korean Chemical Society Vol.39 No.8
Fumaric acid is an important food additive and industrial intermediate compound. The traditional methods of producing fumaric acid were catalyzed by maleic acid isomerization. In this study, isomerization of maleic acid in water without catalyst was investigated at elevated temperature, which addressed the problem of sewage discharge. HPLC analysis showed maleic acid converted into fumaric acid and small amount of malic acid simultaneously. The effects of concentration of maleic acid, reaction temperature, reaction time, and stirring on the yield of fumaric acid were investigated. The optimum reaction conditions were also explored. The results showed the isomerization of maleic acid reached equilibrium at about 1?h, stirring did not affect the reaction rate, and conversion due to the monomolecular mechanism. In order to achieve ?zero emission,? the recycle of filter liquor was also studied. The pH of filter liquor changing signifies the lower pH was in favor of the conversion of maleic acid to fumaric acid. The high yield and recyclability suggested that this process had promising application in fumaric acid production.
Yong-Ping Chen,Feng-Bin Lu,Da-Zhi Chen,Lu Chen,En-De Hu,Jin-Lu Wu,Hui Li,Yue-Wen Gong,Zhuo Lin,Xiao-Dong Wang,Ji Li,Xiao-Ya Jin,Lan-Man Xu 한국분자세포생물학회 2019 Molecules and cells Vol.42 No.12
MicroRNA-223-3p (miR-223-3p) is one of the potential microRNAs that have been shown to alleviate inflammatory responses in pre-clinical investigations and is highly encased in exosomes derived from bone mesenchymal stem cells (MSC-exosomes). MSC-exosomes are able to function as carriers to deliver microRNAs into cells. Autoimmune hepatitis is one of the challenging liver diseases with no effective treatment other than steroid hormones. Here, we examined whether MSC-exosomes can transfer miR-223-3p to treat autoimmune hepatitis in an experimental model. We found that MSC-exosomes were successfully incorporated with miR-223-3p and delivered miR-223-3p into macrophages. Moreover, there was no toxic effect of exosomes on the macrophages. Furthermore, treatments of either exosomes or exosomes with miR-223-3p successfully attenuated inflammatory responses in the liver of autoimmune hepatitis and inflammatory cytokine release in both the liver and macrophages. The mechanism may be related to the regulation of miR-223-3p level and STAT3 expression in the liver and macrophages. These results suggest that MSC-exosomes can be used to deliver miR-223-3p for the treatment of autoimmune hepatitis.
Prognostic Model Built on Blood-based Biomarkers in Patients with Metastatic Colorectal Cancer
He, Wen-Zhuo,Jiang, Chang,Yin, Chen-Xi,Guo, Gui-Fang,Rong, Ru-Ming,Qiu, Hui-Juan,Chen, Xu-Xian,Zhang, Bei,Xia, Liang-Ping Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.17
Background: We had previously showed that the neutrophil lymphocyte ratio (NLR), ${\gamma}$-glutamyl transpeptidase (GGT) and carcinoembryonic antigen (CEA) are prognostic factors for metastatic colorectal cancer (mCRC) patients. In this study we developed a prognostic model based on these three indices. Materials and Methods: A total of 243 patients who were initially diagnosed as mCRC between 2005 and 2010 in the Sun Yat-sen University Cancer Center were studied. The endpoint was overall survival (OS). Results: NLR>3, elevated GGT and elevated CEA were confirmed as independent risk factors which could predict poor prognosis. Patients could be divided into three groups according to the number of risk factors they had. Those with two or three were defined as the high risk group, individuals with one risk factor as the modest risk group and patients without risk factor as the low risk group. The OS values for these three groups were 16.2 months (2.80~68.8), 24.2 months (4.07~79.0), and 37.2 months (12.6~87.8), respectively (p<0.001). Conclusions: We developed a simple but useful model based on NLR, GGT and CEA to provide prognostic information to clinical practice in highly selected mCRC patients. Further prospective and multi-center studies are warranted to test our model.