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Rare Metals 2022年第11期41卷 3654-3661页

作者： Lei Jiao Wenbo Wei Xiaofang Li Cheng-Bin Hong Shu-Guo Han Muhammad Imran Khan Qi-Long Zhu College of Chemistry and Materials Science Fujian Normal UniversityFuzhou350007China State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of Sciences(CAS)Fuzhou350002China Fujian Science and Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou350108China Research Institute of Sciences and Engineering(RISE) University of SharjahSharjah27272United Arab Emirates University of Chinese Academy of Sciences Beijing100049China

In order to realize electrochemical upgrading and improve the energy conversion efficiency,an ingenious strategy of constructing a thermodynamically favorable oxidation reaction to replace oxygen evolution reaction(OE... 详细信息

关键词： replace constructing glycol

Effect of exogenous spastin combined with polyethylene glycol on sciatic nerve injury

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Neural Regeneration Research 2019年第7期14卷 1271-1279页

作者： Yao-Fa Lin Zheng Xie Jun Zhou Hui-Hao Chen Wan-Wan Shao Hao-Dong Lin Department of Orthopedics Changzheng Hospitalthe Second Military Medical University Department of Orthopedics the Second People's Hospital of Karamay

Polyethylene glycol can connect the distal and proximal ends of an injured nerve at the cellular level through axonal fusion to avoid Wallerian degeneration of the injured distal nerve and promote peripheral nerve regeneration.However,this method can only prevent Wallerian degeneration in 10% of axons because the cytoskeleton is not repaired in a timely fashion.Reconstruction of the cytoskeletal trunk and microtubule network has been suggested to be the key for improving the efficiency of axonal fusion.As a microtubule-severing protein,spastin has been used to enhance cytoskeletal reconstruction.Therefore,we hypothesized that spastin combined with polyethylene glycol can more effectively promote peripheral nerve regeneration.A total of 120 male Sprague-Dawley rats were randomly divided into sham,suture,polyethylene glycol,and polyethylene glycol + spastin groups.In suture group rats,only traditional nerve anastomosis of the end-to-end suture was performed after transection of the sciatic nerve.In polyethylene glycol and polyethylene glycol + spastin groups,50 μL of polyethylene glycol or 25 μL of polyethylene glycol + 25 μL of spastin,respectively,were injected immediately under the epineurium of the distal suture.Sensory fiber regeneration distance,which was used to assess early nerve regeneration at 1 week after surgery,was shortest in the suture group,followed by polyethylene glycol group and greatest in the polyethylene glycol + spastin group.Behavioral assessment of motor function recovery in rats showed that limb function was restored in polyethylene glycol and polyethylene glycol + spastin groups at 8 weeks after surgery.At 1,2,4 and 8 weeks after surgery,sciatic functional index values and percentages of gastrocnemius muscle wet weight were highest in the sham group,followed by polyethylene glycol + spastin and polyethylene glycol groups,and lowest in the suture group.Masson staining was utilized to assess the morphology of muscle tissue.Morphological changes in skeletal muscle were detectable in suture,p

关键词： nerve regeneration peripheral nerves Wallerian degeneration polyethylene glycol axonal fusion spastin peripheral nerve injuries Masson staining microtubule neural regeneration

Improvement of low temperature activity and stability of Ni catalysts with addition of Pt for hydrogen production via steam reforming of ethylene glycol

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Green Energy & Environment 2019年第3期4卷 300-310页

作者： Xingling Zhao Kai Wu Weiping Liao Yingxiong Wang Xiaoning Hou Mingshan Jin Zhanghuai Suo Hui Ge Institute of Applied Catalysis Yantai University30 Qingquan RoadYantai 264005ShangdongChina State Key Laboratory of Coal Conversion Institute of Coal ChemistryChinese Academy of SciencesTaiyuan 030001ShanxiChina

Hydrogen production by steam reforming of ethylene glycol(EG) at 300℃ was investigated over SiO2 and CeO2 supported Pt–Ni bimetallic catalysts prepared by incipient wetness impregnation methods. It was observed that impregnation sequence of Pt and Ni can affect the performance of catalysts apparently. Catalyst with Pt first and then Ni addition showed higher EG conversion and H2 yield owing to the Ni enrichment on the surface and the proper interaction between Pt and Ni. It was observed that although SiO2 supported catalysts exhibited better activity and H2 selectivity, CeO2 supported ones had better stability. This is attributed to the less coke formation on CeO2. Increasing Pt/Ni ratio enhanced the reaction activity, and Pt3–Ni7 catalysts with 3 wt% Pt and 7 wt% Ni showed the highest activity and stability. Ni surficial enrichment facilitated the C-C bond rupture and water gas shift reactions;and Pt addition inhibited methanation reaction. Electron transfer and hydrogen spillover from Pt to Ni suppressed carbon deposition. These combined effects lead to the excellent performance of Pt3–Ni7 supported catalysts.

关键词： Ethylene glycol Steam reforming Pt–Ni bimetallic catalyst Hydrogen production Synergistic effect

Effect of poly(ethylene glycol) molecular weight on CO_2/N_2 separation performance of poly(amide-12-b-ethylene oxide)/poly(ethylene glycol) blend membranes

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Journal of Energy Chemistry 2019年第1期28卷 39-45页

作者： Shichao Feng Jizhong Ren Dan Zhao Hui Li Kaisheng Hua Xinxue Li Maicun Deng State Key Laboratory of Biochemical Engineering Institute of Process Engineering Chinese Academy of Sciences National Laboratory for Clean Energy Dalian Institute of Chemical Physics Chinese Academy of Sciences

Membranes from block copolymer poly(amide-12-b-ethylene oxide)(Pebax1074) and its blends with different molecular weight poly(ethylene glycol)(PEG)(200, 400, 600, 1500, 4600 and 8000) were prepared. The thermal properties and structures of Pebax1074/PEG blend membranes were characterized by DSC and SEM, and the gas permeation properties of CO_2 and N_2 were also investigated at different temperatures. For Pebax1074/PEG blend membranes with low molecular weight PEG(MW≤ 600), higher gas permeabilities than Pebax1074 were achieved. The permeability increased with the increase of PEG molecular weight. The addition of low molecular weight PEG resulted in decrease in activation energy of permeation. For Pebax1074/PEG blend membranes with high molecular weight PEG(MW≥ 1500), due to the melt of PEO phase crystals, the gas permeation properties of blend membranes were temperaturedependent, which could be divided into crystalline region, transition region and amorphous region according to two different transition temperatures. PEG molecular weight and operation temperature determined different gas permeation properties of Pebax1074/PEG blend membranes in three regions. The activation energies of permeation in crystalline region were larger than those in amorphous region.

关键词： Poly(amide-12-b-ethylene oxide) Polyethylene glycol Blend membrane Carbon dioxide separation

Effect of temperature on corrosion behavior of 3003 aluminum alloy in ethylene glycol–water solution

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Chinese Journal of Aeronautics 2016年第4期29卷 1142-1150页

作者： Chen Xin Tian Wenming Li Songmei Yu Mei Liu Jianhua School of Material Science and Technology Beihang University

The effect of temperature on the corrosion behavior of 3003 aluminum alloy in ethylene glycol–water solution was investigated by potentiodynamic polarization and electrochemical impedance spectroscopy(EIS) techniques. The surface characterization was observed and determined by scanning electron microscopy(SEM), atomic force microscopy(AFM) and energy dispersive spectrometer(EDS). The results demonstrate that the anodic aluminum dissolution and the cathodic oxygen reduction were accelerated by the increased temperature. However, as temperature was over60 °C, the solubility and concentration of oxygen decreased, resulting in the inhibition of cathodic reaction. The cathodic reaction rate of 3003 aluminum alloy rose to the maximum at 60 °C. The Warburg impedance in Nyquist diagram diminished and then was replaced by a negative capacitance caused by the absorption of intermediate corrosion product on electrode. On the other hand,after potentiodynamic measurements, 3003 aluminum alloy suffered pitting corrosion. The dissolution of aluminum alloy around secondary phase particles expanded both horizontally and vertically.

关键词： 3003 aluminum alloy Corrosion behavior Electrochemical measure ments Ethylene glycol Temperature

Efficacy of 1.2L polyethylene glycol plus ascorbic acid for bowel preparations

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World Journal of Clinical Cases 2019年第4期7卷 452-465页

作者： Hiroyuki Tamaki Teruyo Noda Masahiro Morita Akina Omura Atsushi Kubo Chikara Ogawa Toshihiro Matsunaka Mitsushige Shibatoge Department of Gastroenterology Takamatsu Red Cross Hospital

BACKGROUND A low-volume polyethylene glycol(PEG) solution that combines ascorbic acid with PEG-based electrolyte solution(PEG-ASC) is gaining mainstream acceptance for bowel preparation due to reduced volume and improved taste.Although several reports showed that bowel preparation with PEG-ASC volume lower than 2.0 L with laxative agents could be an alternative to traditional preparation regimen, the cleansing protocols have not been fully investigated.AIM To evaluate the cleansing efficacy of 1.2 L PEG-ASC solution comparing with 2.0 L PEG electrolyte(PEG-ELS) for bowel preparations.METHODS A randomized, single-blinded, open-label, single-center, non-inferiority study was conducted. In total, 312 Japanese adult patients(aged > 18 years) who underwent colonoscopy were enrolled. Patients were randomly allocated to bowel lavage with either 1.2 L of PEG-ASC solution with at least 0.6 L of an additional clear fluid(1.2 L PEG-ASC group) or 2.0 L of PEG-ELS(PEG-ELS group). Then, 48 mg of sennoside was administered at bedtime on the day before colonoscopy, and the designated drug solution was administered at the hospital on the day of colonoscopy. Bowel cleansing was evaluated using the Boston Bowel Preparation Scale(BBPS). The volume of fluid intake and required time for bowel preparation were evaluated. Furthermore, compliance, patient tolerance,and overall acceptability were evaluated using a patient questionnaire, which was assessed using a visual analog scale.RESULTS In total, 291 patients(1.2 L PEG-ASC group, 148; PEG-ELS group, 143) completed the study. There was no significant difference in successful cleansing, defined as a BBPS score ≥ 2 in each segment, between the two groups(1.2 L PEG-ASC group, 91.9%; PEG-ELS group, 90.2%; 95%CI:-0.03-0.09). The required time for bowel preparation was significantly shorter(164.95 min ± 68.95 min vs 202.16 min± 68.69 min, P < 0.001) and the total fluid intake volume was significantly lower(2.23 L ± 0.55 L vs 2.47 L ± 0.56 L, P < 0.001) in the 1.2 L PEG-ASC group than in the

关键词： Ascorbic acid Bowel preparation Colonoscopy Efficacy Polyethylene glycol Tolerability

Revealing the roles of components in glucose selective hydrogenation into 1,2-propanediol and ethylene glycol over Ni-MnO_x-ZnO catalysts

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Journal of Energy Chemistry 2019年第11期28卷 15-19页

作者： Yifan Zan Gai Miao Hao Wang Lingzhao Kong Yaping Ding Yuhan Sun Department of Chemistry Shanghai UniversityShanghai 200444China CAS Key Laboratory of Low-Carbon Conversion Science and Engineering Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201210China

MnOx-promoted Ni-based catalyst supported by ZnO was developed to selectively hydrogenate glucose into polyols in water at 523 K with a yield of 64.9%. Using glucose, sorbitol, glycerol and LA as the rawmaterials, the roles of nickel, ZnO and MnOx were investigated. The results show that nickel provided a new pathway of glucose to sorbitol and played an important role in the hydrogenation of C3 intermediates to 1,2-propanediol(1,2-PDO). The high yield of 1, 2-PDO was attributed to effective C–C bond cleavage performance of ZnO support promoted by MnOx. ZnO and MnOx contribute to the conversion of glycerol to lactic acid(LA) and LA to 1, 2-PDO, respectively. A concise pathway for hydrogenation of glucose over Ni-based catalyst was proposed.

关键词： Glucose Hydrogenation 1, 2-Propanediol Ethylene glycol Ni-based catalyst

Efficacy of 0.5-L vs 1-L polyethylene glycol containing ascorbic acid as additional colon cleansing methods for inadequate bowel preparation as expected by last stool examination before colonoscopy

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World Journal of Clinical Cases 2019年第1期7卷 39-48页

作者： Joon Hyun Cho Eun Joo Goo Kyeong Ok Kim Si Hyung Lee Byung Ik Jang Tae Nyeun Kim Division of Gastroenterology and Hepatology Department of Internal Medicine Yeungnam University College of Medicine

BACKGROUND No consensus has been reached in patients suspected of having inadequate bowel preparation regarding optimal salvage methods, which negatively affects the efficacy and quality of colonoscopy. The most ideal and reasonable rescue option involves early suspicion and identification of patients with inadequate preparation before sedation, additional oral ingestion of a suitable preparation formulation, and same-day colonoscopy.AIM To compare 0.5-L and 1-L polyethylene glycol containing ascorbic acid(PEG +Asc) as additional bowel cleansing methods after a 2-L split-dose PEG + Asc regimen in patients with expected inadequate bowel preparation before colonoscopy.METHODS Individuals with expected inadequate bowel preparation based on last stool form, such as turbid liquid, particulate liquid, or liquid with small amounts of feces, were randomized to either a 0.5-L PEG + Asc group or a 1-L PEG + Asc group. The primary endpoint was bowel preparation as assessed using the Aronchick bowel preparation scale(ABPS) and Boston bowel preparation scale(BBPS) scores. The secondary endpoints were cecal intubation time, withdrawal time, polyp detection rate(PDR), adenoma detection rate(ADR), individual compliance with additional PEG + Asc, and patient satisfaction.RESULTS Initially, 98 patients were included, but 8 were later excluded due to withdrawal of consent to participate in the study. Adequate bowel preparation(as assessed by ABPS) was observed in 80.9%(38/47) of subjects in the 0.5-L group and in88.4%(38/43) of subjects in the 1-L group(P = 0.617). Mean total BBPS was 6.7 points in the 0.5-L group and 7.0 points in the 1-L group(P = 0.458). ADRs and PDRs were similar in the two groups, and cecal intubation and withdrawal times were not significantly different. However, mean patient satisfaction score was significantly higher in the 0.5-L group(P = 0.041).CONCLUSION The bowel cleaning efficacy of additional 0.5-L PEG + Asc was not inferior to that of 1-L PEG + Asc. Additional 0.5-L PEG + Asc is worthwhile when inade

关键词： Inadequate bowel preparation Additional colon cleansing Colonoscopy Polyethylene glycol

Evaluation of a chitosan-polyethylene glycol paste as a local antibiotic delivery device

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世界骨科杂志：英文版 2017年第2期8卷 130-141页

作者： Cheyenne S Rhodes Christopher M Alexander Joel M Berretta Harry S Courtney Karen E Beenken Mark S Smeltzer Joel D Bumgardner Warren O Haggard J Amber Jennings Department of Biomedical Engineering University of Memphis Department of Medicine University of Tennessee Health Science CenterVeterans Affairs Medical Center Department of Microbiology and Immunology University of Arkansas for Medical Sciences

AIM To investigate the efficacy of a chitosan/polyethylene glycol blended paste as a local antibiotic delivery device, particularly in musculoskeletal wounds.METHODS Acidic(A) chitosan sponges and neutralized(N) chitosan/polyethylene glycol(PEG) blended sponges were combined in ratios of 3A:2N, 1A:1N, and 2A:3N; then hydrated with phosphate buffered saline to form a chitosan/PEG paste(CPP). Both in vitro and in vivo studies were conducted to determine the potential CPP has as a local antibiotic delivery device. In vitro biocompatibility was assessed by the cytotoxic response of fibroblast cells exposed to the experimental groups. Degradation rate was measured as the change in dry mass due to lysozyme based degradation over a 10-d period. The antibiotic elution profiles and eluate activity of CPP were evaluated over a 72-h period. To assess the in vivo antimicrobial efficacy of the CPP, antibiotic-loaded paste samples were exposed to subcutaneously implanted murine catheters inoculated with Staphylococcus aureus. Material properties of the experimental paste groups were evaluated by testing the ejection force from a syringe, as well as the adhesion to representative musculoskeletal tissue samples.RESULTS The highly acidic CPP group, 3A:2N, displayed significantly lower cell viability than the control sponge group. The equally distributed group, 1A:1N, and the highly neutral group, 2A:3N, displayed similar cell viability to the control sponge group and are deemed biocompatible. The degradation studies revealed CPP is more readily degradable than the chitosan sponge control group. The antibiotic activity studies indicated the CPP groups released antibiotics at a constant rate and remained above the minimum inhibitory concentrations of the respective test bacteria for a longer time period than the control chitosan sponges, as well as displaying a minimized burst release. The in vivo functional model resulted in complete bacterial infection prevention in all catheters treated with the antibiotic loaded CPP samples. Al

关键词： Chitosan Polyethylene glycol Paste Local antibiotic delivery Biofilm Bacterial infection

Pilot study on efficacy of reduced cathartic bowel preparation with polyethylene glycol and bisacodyl

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World Journal of Gastroenterology 2013年第4期19卷 561-568页

作者： Zhi-Yuan Chen He-Song Shen Ming-Yue Luo Chai-Jie Duan Wen-Li Cai Hong-Bing Lu Guo-Peng Zhang Yang Liu Jerome Z Liang Department of Radiology the Sixth Affiliated Hospital of Sun Yat-Sen University Department of Radiology Guangdong Provincial Hospital of Traditional Chinese Medicine Research Center of Biomedical Engineering Graduate School at ShenzhenTsinghua University Department of Radiology Massachusetts General Hospital and Harvard Medical SchoolBostonMA 02114United States Department of Biomedical Engineering The Fourth Military Medical University Departments of Radiology and Computer Science State University of New York at Stony BrookNew YorkNY 11794United States

AIM:To evaluate the efficacy of reduced cathartic bowel preparation with 2 L polyethylene glycol(PEG)-4000 electrolyte solution and 10 mg bisacodyl enteric-coated tablets for computed tomographic colonography(CTC).METHODS:Sixty subjects who gave informed consent were randomly assigned to study group A,study group B or the control group.On the day prior to CTC,subjects in study group A were given 20 mL 40% wt/vol barium sulfate suspension before 3 mealtimes,60 mL 60% diatrizoate meglumine diluted in 250 mL water after supper,and 10 mg bisacodyl enteric-coated tablets 1 h before oral administration of 2 L PEG-4000 electrolyte solution.Subjects in study group B were treated identically to those in study group A,with the exception of bisacodyl which was given 1 h after oral PEG-4000.Subjects in the control group were managed using the same strategy as the subjects in study group A,but without administration of bisacodyl.Residual stool and fluid scores,the attenuation value of residual fluid,and discomfort during bowel preparation in the three groups were analyzed statistically.RESULTS:The mean scores for residual stool and fluid in study group A were lower than those in study group B,but the differences were not statistically significant.Subjects in study group A showed greater stool and fluid cleansing ability than the subjects in study group B.The mean scores for residual stool and fluid in study groups A and B were lower than those in the control group,and were significantly different.There was no significant difference in the mean attenuation value of residual fluid between study group A,study group B and the control group.The total discomfort index during bowel preparation was 46,45 and 45 in the three groups,respectively,with no significant difference.CONCLUSION:Administration of 10 mg bisacodyl enteric-coated tablets prior to or after oral administration of 2 L PEG-4000 electrolyte solution enhances stool and fluid cleansing ability,and has no impact on the attenuation value of residual fluid or the discomfort

关键词： Colorectal cancer Screening Computed tomographic colonography Polyethylene glycol Bisacodyl