资源类型

期刊论文 100

会议视频 1

年份

2024 1

2023 14

2022 14

2021 6

2020 9

2019 5

2018 7

2017 9

2016 2

2015 5

2014 3

2012 3

2011 2

2010 3

2009 3

2008 4

2007 5

2005 1

2002 1

2001 1

展开 ︾

关键词

人工影响天气 2

发展趋势 2

NASICON 1

“trade-off”效应 1

亚麻屑纤维素 1

产业发展 1

产氧缝合线 1

亲/疏水界面修饰 1

人工增雨 1

人工消雾 1

人工防雹 1

人群流动系数 1

伤口 1

保持电缆 1

修正方法 1

免疫调节细胞 1

全层氧气递送 1

共进化 1

冲击强化 1

展开 ︾

检索范围：

排序： 展示方式：

Enhanced permeability and biofouling mitigation of forward osmosis membranes via grafting graphene quantum dots

《化学科学与工程前沿（英文）》 2023年 第17卷 第10期   页码 1470-1483 doi: 10.1007/s11705-023-2329-5

摘要： In this paper, graphene oxide quantum dots with amino groups (NH2-GOQDs) were tailored to the surface of a thin-film composite (TFC) membrane surface for optimizing forward osmosis (FO) membrane performance using the amide coupling reaction. The results jointly demonstrated hydrophilicity and surface roughness of the membrane enhanced after grafting NH2-GOQDs, leading to the optimized affinity and the contact area between the membrane and water molecules. Therefore, grafting of the membrane with a concentration of 100 ppm (TFC-100) exhibited excellent permeability performance (58.32 L·m–2·h–1) compared with TFC membrane (16.94 L·m–2·h–1). In the evaluation of static antibacterial properties of membranes, TFC-100 membrane destroyed the cell morphology of Escherichia coli (E. coli) and reduced the degree of bacterial adsorption. In the dynamic biofouling experiment, TFC-100 membrane showed a lower flux decline than TFC membrane. After the physical cleaning, the flux of TFC-100 membrane could recover to 96% of the initial flux, which was notably better than that of TFC membrane (63%). Additionally, the extended Derjaguin–Landau–Verwey–Overbeek analysis of the affinity between pollutants and membrane surface verified that NH2-GOQDs alleviates E. coli contamination of membrane. This work highlights the potential applications of NH2-GOQDs for optimizing permeability and biofouling mitigation of FO membranes.

关键词： forward osmosis membrane     graphene oxide quantum dots     graft modification     anti-fouling membrane     XDLVO theory    

HTML PDF 收藏

Risk factors for chronic graft-versus-host disease after anti-thymocyte globulin-based haploidentical

Meng Lv, Xiaohui Zhang, Lanping Xu, Yu Wang, Chenhua Yan, Huan Chen, Yuhong Chen, Wei Han, Fengrong Wang, Jingzhi Wang, Kaiyan Liu, Xiaojun Huang, Xiaodong Mo

《医学前沿（英文）》 2019年 第13卷 第6期   页码 667-679 doi: 10.1007/s11684-019-0702-z

摘要： Chronic graft-versus-host disease (cGVHD) is a major complication following unmanipulated haploidentical hematopoietic stem cell transplantation (haplo-HSCT). We aimed to identify the risk factors for cGVHD in patients who underwent anti-thymocyte globulin-based haplo-HSCT for acute myeloid leukemia ( =280). The diagnosis of cGVHD was in accordance with the National Institutes of Health consensus criteria. A total of 169 patients suffered from cGVHD. The patients who had 3 loci mismatched had a higher 8-year incidence of cGVHD (total, 66.0% vs. 53.7%, =0.031; moderate to severe, 42.4% vs. 30.1%, =0.036) than the patients who had 1 to 2 loci mismatched. The patients who had maternal donors had a higher 8-year incidence of moderate to severe cGVHD (49.2% vs. 32.9%, =0.024) compared with the patients who had other donors. The patients who had grades III to IV acute GVHD (aGVHD) had higher 8-year incidence of cGVHD (total, 88.0% vs. 50.4%, <0.001; moderate to severe, 68.0% vs. 27.0%, <0.001) compared with the patients without aGVHD. In multivariate analysis, grades III to IV aGVHD was the only independent risk factor for cGVHD. Thus, further interventions should be considered in patients with severe aGVHD to prevent cGVHD.

关键词： acute graft-versus-host disease     chronic graft-versus-host disease     National Institutes of Health consensus criteria     acute myeloid leukemia     anti-thymocyte globulin    

HTML PDF 收藏

Performance and synergistic effect of phenolic and thio antioxidants in ABS graft copolymers

Gongsheng LI, Xuhong GUO, Wang NA, Diancheng HAO, Mingyao ZHANG, Huixuan ZHANG, Jun XU

《化学科学与工程前沿（英文）》 2011年 第5卷 第1期   页码 26-34 doi: 10.1007/s11705-010-0531-8

摘要： The synergistic effect of phenolic and thio antioxidants on the stabilization of acrylonitrile-butadiene-styrene (ABS) graft copolymers has been studied. Three commercial antioxidants Irganox245, Irganox1076 and dilauryl thiodipropionate (DLTP) were selected. Formulations based on hindered phenols and secondary antioxidant DLTP were prepared. Stabilization was monitored in terms of changes in the functional groups (oxidation products), tensile properties and yellowness index. Differential scanning calorimetry (DSC) and thermogravimetry (TG) were also used to assess the stability. The results indicated that the combination of Irganox245 and DLTP showed much better stabilization effect than the individual components due to the strong synergistic effect. Only weak synergism could be observed in the formulation that contained Irganox1076 and DLTP. Irganox1076 and Irgnox1076/DLTP exhibited similar behaviors between antioxidants with the highest and lowest efficiencies.

关键词： antioxidant     ABS graft copolymers     synergistic effect    

HTML PDF 收藏

Separation of epigallocatechin-3-gallate from crude tea polyphenols by using Cellulose diacetate graft

Hong ZHU, Peiyong QIN

《化学科学与工程前沿（英文）》 2011年 第5卷 第3期   页码 330-338 doi: 10.1007/s11705-010-1104-6

摘要： This study demonstrates a new Cellulose diacetate graft -cyclodextrin (CDA- -CD) copolymer asymmetric membrane prepared by a phase inversion technique for the separation of (-)-epigallocatechin-3-gallate (EGCG) from other polyphenols in crude tea. The graft copolymer, CDA- -CD, was synthesized by prepolymerization of cellulose diacetate (CDA) and 1,6-hexamethylene-diisocyanate (HDI), which was then grafted with -cyclodextrin ( -CD). Surface and cross-section morphologies of the CDA- -CD membranes were analyzed by using scanning electron microscopy (SEM). Fourier transform infrared spectroscopy (FT-IR) indicated that the -CD was grafted onto the CDA by chemical bonding. The influences of the HDI/CDA mass ratio and the catalyst mass fraction on the -CD graft yield were investigated. The optimum conditions of a HDI/CDA mass ratio of 0.35 g·g and a catalyst mass fraction of 0.18 wt-% produced a -CD graft yield of 26.51 wt-%. The effects of the -CD graft yield and the concentration of the polymer cast solution on the separation of EGCG were also investigated. Under optimum conditions of a -CD graft yield of 24.21 wt-% and a polymer concentration of 13 wt-%, the purity of EGCG increased from 26.51 to 86.91 wt-%.

关键词： (-)-epigallocatechin-3-gallate (EGCG)     tea polyphenols     CDA-β-CD    

HTML PDF 收藏

Gene and protein expression of proteinase-activated receptor-1, 2 in a murine model of acute graft host

Quan LI MD , Weiming LI MD , Ping ZOU MD , Jian ZHANG BM ,

《医学前沿（英文）》 2009年 第3卷 第3期   页码 309-315 doi: 10.1007/s11684-009-0043-4

摘要： Proteinase-activated receptors (PARs) are a novel subclass of seven transmembrane-spanning, G protein-coupled receptors. PAR-1 and PAR-2 are widely expressed in a variety of cells and are found to be involved in many physiological and pathological processes including inflammation and immune response. However, little is known about the function of PAR-1, 2 in acute graft host disease (GVHD). In the present study, we first detected the expression of PAR-1, 2 protein and mRNA in a murine model of acute GVHD using the methods of immunohistochemistry, Western blot and quantitative real-time polymerase chain reaction (PCR). Syngeneic hematopoietic stem cell transplantation (HSCT) mice served as controls. The relative gene expression level of PAR-1 was significantly increased in the skin, liver, small intestine of allogeneic HSCT mice (in skin: 0.039±0.013 0.008±0.002 of controls, =0.009; in liver: 0.165±0.006 0.017±0.006 of controls, =0.004; in small intestine: 0.215±0.009 0.016±0.002 of controls, =0.003), but not in the stomach, lung and kidney of allogeneic HSCT mice (>0.05). PAR-2 mRNA expression in the liver and small intestine of allogeneic HSCT mice (in liver: 0.010±0.002 0.003±0.001 of controls, =0.008; in small intestine: 0.006±0.001 0.003±0.001 of controls, =0.024) was increased significantly, but PAR-2 mRNA expression in the other organs (>0.05) was not found to be significantly elevated. PAR-1, 2 protein expression was in accordance with the mRNA expression, as shown by Western blot. Using immunohistochemistry the present study demonstrated that there was strong PAR-1, 2 immunoreactivity in the epithelial cell and vascular endothelial cell of target organs of acute GVHD. Our findings of markedly increased expression of PAR-1, 2 in target organs of acute GVHD suggest that PAR-1 and PAR-2 may play an important role in the pathogenesis of acute GVHD.

关键词： graft vs host disease     proteinase-activated receptor     murine model     hematopoietic stem cell transplantation    

HTML PDF 收藏

Sustainable functionalization and modification of materials via multicomponent reactions in water

《化学科学与工程前沿（英文）》 2022年 第16卷 第9期   页码 1318-1344 doi: 10.1007/s11705-022-2150-6

摘要： In materials chemistry, green chemistry has established firm ground providing essential design criteria to develop advanced tools for efficient functionalization and modification of materials. Particularly, the combination of multicomponent reactions in water and aqueous media with materials chemistry unlocks a new sustainable way for constructing multi-functionalized structures with unique features, playing significant roles in the plethora of applications. Multicomponent reactions have received significant consideration from the community of material chemistry because of their great efficiency, simple operations, intrinsic molecular diversity, and an atom and a pot economy. Also, by rational design of multicomponent reactions in water and aqueous media, the performance of some multicomponent reactions could be enhanced by the contributing “natural” form of water-soluble materials, the exclusive solvating features of water, and simple separating and recovering materials. To date, there is no exclusive review to report the sustainable functionalization and modification of materials in water. This critical review highlights the utility of various kinds of multicomponent reactions in water and aqueous media as green methods for functionalization and modification of siliceous, magnetic, and carbonaceous materials, oligosaccharides, polysaccharides, peptides, proteins, and synthetic polymers. The detailed discussion of synthetic procedures, properties, and related applicability of each functionalized/modified material is fully deliberated in this review.

关键词： materials     multicomponent reactions     modification     functionalization     water    

HTML PDF 收藏

An investigation on modification mechanism of CH

Qiang XIN, Shanghong HUANG

《结构与土木工程前沿（英文）》 2017年 第11卷 第3期   页码 293-300 doi: 10.1007/s11709-017-0403-0

摘要： Rising oil price has brought huge cost pressure for low grade highway construction, and it is urgent to find alternative resources. At the same time, there are nearly 50000–60000 tons of low temperature coal output in inner Mongolia region, China, which has high toxicity and high polluting. To make the low temperature coal be applicable for road constructions, the formaldehyde is used as cross linking agent, the concentrated sulfuric acid is used as catalyst, and the chemical modification of low temperature coal tar pitch in Inner Mongolia region is investigated. The road performance (softening point, penetration and ductility) of modified low temperature coal are tested. Results shown that the road performance of modified low temperature coal is increased significantly. Modification mechanism of low temperature coal is studied by Scanning Electron Microscopy and other analytical tools. Results show that, in the modified low temperature coal, resin content increases and the resin fiber diameter becomes larger with the increasing of formaldehyde content.

关键词： low temperature     coal tar pitch     modification     road performance    

HTML PDF 收藏

Synthesis and thermosensitive behavior of dextran graft copolymers containing poly (N-vinylcaprolactam

SHI Huangying, CHEN Wenjuan, ZHANG Liming

《化学科学与工程前沿（英文）》 2007年 第1卷 第1期   页码 72-75 doi: 10.1007/s11705-007-0015-7

摘要： New graft copolymers were synthesized by grafting N-vinylcaprolactam onto dextran. Their composition and structure were investigated by elemental analyses, infrared spectra and thermogravimetric analyses. By optical transmittance measurements, it was found that the aqueous solutions of these graft copolymers showed a temperature-dependent transmittance change due to the introduction of thermosensitive poly (-vinylcaprolactam) graft chains. Moreover, the lower critical solution temperature (LCST) of the graft copolymer in aqueous solution was dependent on its grafting extent and concentration. The LCST value was found to increase with the increase of the grafting extent and decrease with the increase of the copolymer concentration. With these stimuli-response properties, such polysaccharide derivative may hold potential applications in biomedicine and biotechnology.

关键词： transmittance     copolymer concentration     LCST     temperature     elemental    

HTML PDF 收藏

Research progress on low dielectric constant modification of cellulose insulating paper for power transformers

《化学科学与工程前沿（英文）》 2023年 第17卷 第8期   页码 991-1009 doi: 10.1007/s11705-022-2259-7

摘要： Because of the increase in the transmission voltage levels, the demand for insulation reliability of power transformers has increasingly become critical. Cellulose insulating paper is the main insulating component of power transformers. To improve the insulation level of ultrahigh voltage transformers and reduce their weight and size, reducing the dielectric constant of oil-immersed cellulose insulating paper is highly desired. Cellulose is used to produce power-transformer insulating papers owing to its excellent electrical properties, renewability, biodegradability and abundance. The dielectric constant of a cellulose insulating paper can be effectively reduced by chemical or physical modification. This study presents an overview of the foreign and domestic research status of the use of modification technology to reduce the dielectric constant of cellulose insulating papers. All the mentioned methods are analyzed in this study. Finally, some recommendations for future modified cellulose insulating paper research and applications are proposed. This paper can provide a reference for further research on low dielectric constant cellulose insulating paper in the future.

关键词： low dielectric constant     chemical and physical modification     cellulose insulating paper     transformer     nanomaterials.    

HTML PDF 收藏

Crystal modification of rifapentine using different solvents

Kun ZHOU, Jun LI, Jianhong LUO, Dongsheng ZHENG,

《化学科学与工程前沿（英文）》 2010年 第4卷 第1期   页码 65-69 doi: 10.1007/s11705-009-0302-6

摘要： Rifapentine crystals with different habits were prepared by recrystallization from selected solvents, such as methanol, ethanol, chloroform, and acetic acid. Scanning electron microscopy, X-ray powder diffractometry, infrared spectrometry, and differential scanning calorimetry were used to investigate the physicochemical characteristics of the prepared crystals. The comparative dissolution behaviors of the newly developed crystals and of rifapentine without being treated were also studied. Results show that the newly developed crystals were different from each other with respect to physical properties but were identical chemically. Needle-shaped crystals were obtained from methanol, ethanol, and chloroform solvents, and the block-shaped crystals were obtained from acetic acid solvent. X-ray diffraction spectra and differential scanning calorimetry investigation on those developed crystals clearly indicate that rifapentine has different crystal structure modification. When the crystal was obtained from acetic acid, the change of crystal habit was originated from the crystal structure modification. The dissolution rate of newly developed crystals was found to be higher than that of rifapentine without being treated. However, the modified crystal obtained from acetic acid shows the lower dissolution rate than crystals obtained from other solvents.

关键词： identical     scanning calorimetry     different     comparative dissolution     structure modification    

HTML PDF 收藏

Surface modification techniques of membranes to improve their antifouling characteristics: recent advancements

《化学科学与工程前沿（英文）》 2023年 第17卷 第12期   页码 1837-1865 doi: 10.1007/s11705-023-2347-3

摘要： Surface modification techniques of membranes to improve their antifouling characteristics: recent advancements and developments

关键词： Surface modification techniques    

HTML PDF 收藏

Graft versus host disease after liver transplantation: A case report

Peng-Ji GAO, Xi-Sheng LENG, Dong WANG, Guang-Ming LI, Lei HUANG, Jie GAO, JI-Ye ZHU,

《医学前沿（英文）》 2010年 第4卷 第4期   页码 469-472 doi: 10.1007/s11684-010-0120-8

摘要： In documenting clinical experience in the diagnosis and treatment of graft host disease (GVHD), we retrospectively analyzed data of one case that has developed GVHD after liver transplantation. This patient exhibited fever, skin rash, and diarrhea on day 9 after liver transplantation. His liver function was normal. Skin biopsy showed scattered keratinocytes accompanied by satellite-like lymphocyte infiltration and basal cell liquefaction degeneration. After carefully analyzing the complications, we took the strategy of decreasing the dose of tacrolimus. Thereafter, the patient’s temperature decreased to normal, his skin rashes subsided, and his diarrhea was relieved. This case suggests that reducing the dosage of immunosuppressive agents can be an effective strategy for GVHD after liver transplantation.

关键词： liver transplantation     graft versus host disease    

HTML PDF 收藏

免疫调节细胞生物学及其在急性移植物抗宿主病预防或治疗中的临床应用 Review

Bruce R. Blazar

《工程（英文）》 2019年 第5卷 第1期   页码 98-105 doi: 10.1016/j.eng.2018.11.016

摘要：

预防和治疗移植物抗宿主病（GVHD）最常见的方法是尝试耗竭或抑制能介导或支持同种异体反应的T细胞；但这会导致T细胞受体功能缺陷，并因此对感染和肿瘤复发高度敏感。通常通过广泛使用反应性抗体来实现耗竭，而功能损坏通常在使用需长期给药（一般为6个月或更长时间）且具有明显副作用的药物后发生，这种药物可能不会导致供体T细胞对耐调节方案且携带宿主同种抗原的细胞产生耐受性（即无反应性）。随着对免疫系统稳态认识的深化，我们已能鉴定和表征具有免疫调节功能的细胞群。虽然这种细胞群通常比较少见，但可通过分离和扩增此类细胞的方法在移植后晚期增补供体移植物或进行输注，来抑制GVHD。本文将探讨GVHD模型中的生物学和临床前概念验证，以及现已发展至临床测试阶段的免疫调节细胞疗法对GVHD的疗效。

关键词： 移植物抗宿主病（GVHD）     免疫调节细胞     细胞疗法    

HTML PDF 收藏

Reducing biliary complications in adult-to-adult living donor liver transplantation using right lobe graft

YAN Lunan, WEN Tianfu, WANG Wentao, YANG Jiayin, XU Mingqing, CHEN Zheyu, WU Hong

《医学前沿（英文）》 2008年 第2卷 第2期   页码 130-133 doi: 10.1007/s11684-008-0024-z

摘要： The aim of this paper is to summarize our experience of using right lobe liver grafts to reduce biliary complications in adult-to-adult (A-A) living donor liver transplantation (LDLT). From January 2002 to October 2007, 124 adult patients underwent living donor liver transplantation using right lobe grafts at the West China Hospital, Sichuan University Medical School, China. There was no death in all donors. Biliary reconstruction for 178 hepatic duct orifices from 124 donor grafts was performed which included 106 reconstructions of duct-to-duct anastomoses and 72 cholangiojejunostomy. Nine recipients had biliary complications including six bile leakages (four from the anastomotic site and two from the cut surface of the liver graft) and three biliary strictures. With the improved techniques for biliary reconstruction, we have achieved good results in 124 recipients of A-A LDLT. We ascribe our success to the introduction of microsurgical techniques and the use of fixed operators which help in decreasing the biliary complications of LDLT.

关键词： microsurgical     October     improved     success     transplantation    

HTML PDF 收藏

RNA m6A modification and its function in diseases

null

《医学前沿（英文）》 2018年 第12卷 第4期   页码 481-489 doi: 10.1007/s11684-018-0654-8

摘要：

N6-methyladenosine (m6A) is the most common post-transcriptional RNA modification throughout the transcriptome, affecting fundamental aspects of RNA metabolism. m6A modification could be installed by m6A “writers” composed of core catalytic components (METTL3/METTL14/WTAP) and newly defined regulators and removed by m6A “erasers” (FTO and ALKBH5). The function of m6A is executed by m6A “readers” that bind to m6A directly (YTH domain-containing proteins, eIF3 and IGF2BPs) or indirectly (HNRNPA2B1). In the past few years, advances in m6A modulators (“writers,” “erasers,” and “readers”) have remarkably renewed our understanding of the function and regulation of m6A in different cells under normal or disease conditions. However, the mechanism and the regulatory network of m6A are still largely unknown. Moreover, investigations of the m6A physiological roles in human diseases are limited. In this review, we summarize the recent advances in m6A research and highlight the functional relevance and importance of m6A modification in in vitro cell lines, in physiological contexts, and in cancers.

关键词： RNA modification     m6A     immunity     cancer     epigenetics    

HTML PDF 收藏

标题 作者 时间 类型 操作

Enhanced permeability and biofouling mitigation of forward osmosis membranes via grafting graphene quantum dots

期刊论文

Risk factors for chronic graft-versus-host disease after anti-thymocyte globulin-based haploidentical

Meng Lv, Xiaohui Zhang, Lanping Xu, Yu Wang, Chenhua Yan, Huan Chen, Yuhong Chen, Wei Han, Fengrong Wang, Jingzhi Wang, Kaiyan Liu, Xiaojun Huang, Xiaodong Mo

期刊论文

Performance and synergistic effect of phenolic and thio antioxidants in ABS graft copolymers

Gongsheng LI, Xuhong GUO, Wang NA, Diancheng HAO, Mingyao ZHANG, Huixuan ZHANG, Jun XU

期刊论文

Separation of epigallocatechin-3-gallate from crude tea polyphenols by using Cellulose diacetate graft

Hong ZHU, Peiyong QIN

期刊论文

Gene and protein expression of proteinase-activated receptor-1, 2 in a murine model of acute graft host

Quan LI MD , Weiming LI MD , Ping ZOU MD , Jian ZHANG BM ,

期刊论文

Sustainable functionalization and modification of materials via multicomponent reactions in water

期刊论文

An investigation on modification mechanism of CH

Qiang XIN, Shanghong HUANG

期刊论文

Synthesis and thermosensitive behavior of dextran graft copolymers containing poly (N-vinylcaprolactam

SHI Huangying, CHEN Wenjuan, ZHANG Liming

期刊论文

Research progress on low dielectric constant modification of cellulose insulating paper for power transformers

期刊论文

Crystal modification of rifapentine using different solvents

Kun ZHOU, Jun LI, Jianhong LUO, Dongsheng ZHENG,

期刊论文

Surface modification techniques of membranes to improve their antifouling characteristics: recent advancements

期刊论文

Graft versus host disease after liver transplantation: A case report

Peng-Ji GAO, Xi-Sheng LENG, Dong WANG, Guang-Ming LI, Lei HUANG, Jie GAO, JI-Ye ZHU,

期刊论文

免疫调节细胞生物学及其在急性移植物抗宿主病预防或治疗中的临床应用

Bruce R. Blazar

期刊论文

Reducing biliary complications in adult-to-adult living donor liver transplantation using right lobe graft

YAN Lunan, WEN Tianfu, WANG Wentao, YANG Jiayin, XU Mingqing, CHEN Zheyu, WU Hong

期刊论文

RNA m6A modification and its function in diseases

null

期刊论文