• Title, Summary, Keyword: Qingdao

Search Result 250, Processing Time 0.033 seconds

A novel preparation and formation mechanism of carbon nanotubes aerogel

  • Li, Shaolong;He, Yan;Jing, Chengwei;Gong, Xiubin;Cui, Lianlei;Cheng, Zhongyue;Zhang, Chuanqi;Nan, Fei
    • Carbon letters
    • /
    • v.28
    • /
    • pp.16-23
    • /
    • 2018
  • A novel, unique, and effective method for carbon nanotube (CNT) dispersion by the free arc stimulation is proposed. CNTs are introduced as an aerogel into the air space via the dispersion method and can be utilized as a solution by adding it to solvents. The volume of the original generated CNT aerogel with a high-volume expansion ratio displays a performance two orders of magnitudes better than that of raw CNTs, which is considered a powerful characterization of the dispersion effect. The CNT aerogel, which was observed by scanning electron microscopy also showed a satisfactory dispersion morphology. Its structure and properties were tested before and after dispersion by Raman spectroscopy and great consistency was observed, which proved that the CNTs were undamaged. This approach may greatly promote the large-scale application of CNTs.

Functional roles and mechanisms of ginsenosides from Panax ginseng in atherosclerosis

  • Xue, Qianqian;He, Ningning;Wang, Zhibin;Fu, Xiuxiu;Aung, Lynn Htet Htet;Liu, Yan;Li, Min;Cho, Jae Youl;Yang, Yanyan;Yu, Tao
    • Journal of Ginseng Research
    • /
    • v.45 no.1
    • /
    • pp.22-31
    • /
    • 2021
  • Atherosclerosis (AS) is a leading cause of cardiovascular diseases (CVDs) and it results in a high rate of death worldwide, with an increased prevalence with age despite advances in lifestyle management and drug therapy. Atherosclerosis is a chronic progressive inflammatory process, and it mainly presents with lipid accumulation, foam cell proliferation, inflammatory response, atherosclerotic plaque formation and rupture, thrombosis, and vascular calcification. Therefore, there is a great need for reliable therapeutic drugs or remedies to cure or alleviate atherosclerosis and reduce the societal burden. Ginsenosides are natural steroid glycosides and triterpene saponins obtained mainly from the plant ginseng. Several recent studies have reported that ginsenosides have a variety of pharmacological activities against several diseases including inflammation, cancer and cardiovascular diseases. This review focuses on describing the different pharmacological functions and underlying mechanisms of various active ginsenosides (Rb1,-Rd, -F, -Rg1, -Rg2, and -Rg3, and compound K) for atherosclerosis, which could provide useful insights for developing novel and effective anti-cardiovascular drugs.

Recovery Processes of Organic Acids from Fermentation Broths in the Biomass-Based Industry

  • Li, Qian-Zhu;Jiang, Xing-Lin;Feng, Xin-Jun;Wang, Ji-Ming;Sun, Chao;Zhang, Hai-Bo;Xian, Mo;Liu, Hui-Zhou
    • Journal of Microbiology and Biotechnology
    • /
    • v.26 no.1
    • /
    • pp.1-8
    • /
    • 2016
  • The new movement towards green chemistry and renewable feedstocks makes microbial production of chemicals more competitive. Among the numerous chemicals, organic acids are more attractive targets for process development efforts in the renewable-based biorefinery industry. However, most of the production costs in microbial processes are higher than that in chemical processes, among which over 60% are generated by separation processes. Therefore, the research of separation and purification processes is important for a promising biorefinery industry. This review highlights the progress of recovery processes in the separation and purification of organic acids, including their advantages and disadvantages, current situation, and future prospects in terms of recovery yields and industrial application.

Construction and Expression of an Eukaryotic Expression Vector Containing the IER3 Gene

  • Wang, Zhen;Yu, Hong-Sheng;Yao, Ru-Yong;Qiu, Wen-Sheng;Yue, Lu;Sui, Ai-Hua;Liu, Xiang-Ping;Liu, Shi-Hai
    • Asian Pacific Journal of Cancer Prevention
    • /
    • v.14 no.1
    • /
    • pp.507-510
    • /
    • 2013
  • Background: More and more research indicate that the immediately early response gene 3 (IER3) is involved inmany biological provesses, such as apoptosis and immunoreaction, as well as viral infection, tumorigenesis and tumour progression. Methods: Here we describe the construction of an eukaryotic expression vector containing IER3 gene and its expression in A549 cells as assessed through fluorescence microscopyand Western-blotting. Results: Fluorescence detection displayed that GFP in cytoplasm was high during 48 and 72 hours post-transfection. In addition, Western blotting showed significant increase in IER3 gene expression in the transfected cells compared with controls. Conclusion: The recombinate plasmid expression vector was constructed successfully, which may provide a basis for further exploration of function of IER3 in lung cancer.

Integration Sites and Genotype Distributions of Human Papillomavirus in Cervical Intraepithelial Neoplasia

  • Wang, Li;Dai, Shu-Zhen;Chu, Hui-Jun;Cui, Hong-Fei;Xu, Xiao-Yan
    • Asian Pacific Journal of Cancer Prevention
    • /
    • v.14 no.6
    • /
    • pp.3837-3841
    • /
    • 2013
  • Objectives: To analyse HPV integration prevalence and genotype distributions in cervical intraepithelial neoplasia (CIN) in east part of China, furthermore to assess preferential sites for common HPV integrations and provide baseline information for cervical abnormality screening and prevention. Methods: Integration of HPV in 113 paraffin-embedded cervical intraepithelial neoplasia samples was assessed using Gencap technology in Key Laboratory of Biotechnologies in BGI-Shenzhen. Results: 64 samples were HPV-integrated and as the cervical lesions increased, the integration rate became higher significantly (P=0.002). Fifteen different HPV genotypes were detected, 14 high-risk (16, 18, 31, 33, 51, 52, 56, 58, 66, 68) and 1 low-risk (11). The most common genotypes were HPV-16, 58, 33, 52, 66, and 56. Thirteen patients had co-integration involving mainly HPV-16 and 58. The frequency of HPV gene disruption was higher in L1 and E1 genes than in other regions of the viral genomes. Conclusion: Some 56.6% of CIN lesions in Qingdao had HPV integrations, and 67.2% of HPV-integrated patients were HPV-16 and 58, more prone to be integrated in younger patients below 45 years old. There exist preferential sites for HPV-16 and HPV-58 integration, and they are more likely to be disrupted in the L1 and E1 loci.

MoS2 Layers Decorated RGO Composite Prepared by a One-Step High-Temperature Solvothermal Method as Anode for Lithium-Ion Batteries

  • Liu, Xuehua;Wang, Bingning;Liu, Jine;Kong, Zhen;Xu, Binghui;Wang, Yiqian;Li, Hongliang
    • Nano
    • /
    • v.13 no.11
    • /
    • pp.1850135.1-1850135.8
    • /
    • 2018
  • A one-step high-temperature solvothermal approach to the synthesis of monolayer or bilayer $MoS_2$ anchored onto reduced graphene oxide (RGO) sheet (denoted as $MoS_2/RGO$) is described. It was found that single-layered or double-layered $MoS_2$ were synthesized directly without an extra exfoliation step and well dispersed on the surface of crumpled RGO sheets with random orientation. The prepared $MoS_2/RGO$ composites delivered a high reversible capacity of $900mAhg^{-1}$ after 200 cycles at a current density of $200mAg^{-1}$ as well as good rate capability as anode active material for lithium ion batteries. This one-step high-temperature hydrothermal strategy provides a simple, cost-effective and eco-friendly way to the fabrication of exfoliated $MoS_2$ layers deposited onto RGO sheets.

A Study on Urban Transformation and Modern Architecture Development of Qingdao in the Colonial Period (항구도시 칭다오의 식민지 시대 도시변천과 근대건축형성에 관한 연구)

  • Lee, Han-Seok;Song, Seog-Ki;Kim, Na-Young;Lu, Hongwei
    • Journal of Navigation and Port Research
    • /
    • v.34 no.5
    • /
    • pp.355-365
    • /
    • 2010
  • As a port city, Qingdao had been developed through the 4 stages during the first half of the 20th century. First stage is German Occupation period. In this period, the old downtown of Qingdao was formed and the existing architectural characteristics of Qingdao had been established. Second stage is the First Japanese Occupation period. Japanese transformed Qingdao into Japanese city and expanded city area to north and east. Third stage is Northern Warlords and the National Government period. In this period, Qingdao had been developed as an international city of world trade and vacation. Forth stage is the Second Japanese Occupation period. Japanese tried to change Qingdao as a military base for the invasion of the northern China.

Dietary Fibre and the Risk of Colorectal Cancer: a Case-Control Study

  • Song, Y;Liu, M;Yang, FG;Cui, LH;Lu, XY;Chen, C
    • Asian Pacific Journal of Cancer Prevention
    • /
    • v.16 no.9
    • /
    • pp.3747-3752
    • /
    • 2015
  • Background: Colorectal cancer is one of the most commonly occurring cancers in China. Dietary fibre has been thought to decrease the risk of colorectal cancer in Western countries. However, studies investigating the association between dietary fibre (particularly soluble and insoluble fibres) and colorectal cancer have hitherto been lacking in China. Objective: This case-control study examined the effect of dietary fibre intake on the risk of colorectal cancer, stratified by tumour site. Materials and Methods: The study included 265 cases (colon cancer, 105; rectal cancer, 144; colon and rectal cancer, 16) and 252 controls residing in Qingdao. A food frequency questionnaire that included 121 food items was used to collect dietary information. Odds ratio (OR) and 95% confidence intervals (CI) were calculated using unconditional logistic regression analysis. Results: For food groups, controls in the study consumed more vegetables, soy food and total fibre than did colorectal cancer patients (p<0.05). The intakes of fruit, meat and sea-food did not differ significantly between cases and controls. However, we did not find any association between soy food intake and colon cancer. We observed inverse associations between total fibre intake and colorectal, colon and rectal cancer (Q4 vs Q1: OR=0.44, 95%CI, 0.27-0.73; OR=0.40, 95%CI, 0.21-0.76; OR=0.52, 95%CI, 0.29-0.91). Vegetable fibre intake showed similar inverse associations (Q4 vs Q1: OR=0.51, 95%CI, 0.31-0.85; OR=0.48, 95%CI, 0.25-0.91; OR=0.53, 95%CI, 0.29-0.97). In addition, inverse associations were observed between soluble fibre and insoluble fibre and both colorectal cancer and colon cancer. No relationship was found between colorectal cancer and fruit, soy or grain fibre intakewhen the results were stratified by tumour site. Conclusions: The present study suggests that vegetable fibre and total fibre play very important roles in protecting against colorectal cancer. Soluble and insoluble fibres were inversely associated with only colorectal cancer and colon cancer.