|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Influence of the post-treatment of HZSM-5 zeolite on catalytic performance for alkylation of benzene with methanol显示文摘The porous material HZSM-5 zeolite with micro-mesopore hierarchical porosity was prepared by post-treatment(combined alkali treatment and acid leaching) of parent zeolite and its catalytic performance for benzene alkylation with methanol was investigated. The effect of post-treatment on the textural properties was characterized by various techniques(including ICP-AES, XRD, nitrogen sorption isotherms, SEM, NH3-TPD, Py-IR and TG). The results indicated that the post-treatment could modify the structural and acidic properties of HZSM-5 zeolite. In this procedure, not only additional mesopores were created by selective extraction of silicon but also the acidity was tuned. Consequently, the modified HZSM-5 zeolite showed larger external surface area with less acid sites as compared to the parent zeolite. It was found out that the modified zeolite exhibited a higher benzene conversion and xylene selectivity for alkylation of benzene with methanol as well as excellent life span of the catalyst than conventional ones. This can be explained by the facts that the presence of additional mesopores improved the diffusion property in the reactions. Furthermore, the modified zeolite showed an appropriate Br?nsted acidity for effective suppression of the side reaction of methanol to olefins, thus reduced the accumulation of coke on the HZSM-5 zeolite, which was favorable for the catalyst stability. In comparison with the parent HZSM-5 zeolite,the modified zeolite by alkali treatment and acid leaching showed better performance for the benzene alkylation with methanol. | Qingtao Wang Wenwen Han Hualei Hu Jinghui Lyu Xiaolong Xu Qunfeng Zhang Hongjing Wang Xiaonian Li | 2017 | Chinese Journal of Chemical Engineering2017，25，12： | 13 |
| 2 | Recombinant vaccine containing an RBD-Fc fusion induced protection against SARS-CoV-2 in nonhuman primates and mice显示文摘The novel coronavirus SARS-CoV-2 has infected more than 104 million individuals and resulted in more than 2.2 million deaths worldwide as of February 7,2021(https://covid19.who.int).The COVID-19 pandemic highlights the need for safe and effective vaccines against SARS-CoV-2 infection. | Shihui Sun Lei He Zhongpeng Zhao Hongjing Gu Xin Fang Tiecheng Wang Xiaolan Yang Shaolong Chen Yongqiang Deng Jiangfan Li Jian Zhao Liang Li Xinwang Li Peng He Ge Li Hao Li Yuee Zhao Chunrun Gao Xiaoling Lang Xin Wang Guoqiang Fei Yan Li Shusheng Geng Yuwei Gao Wenjin Wei Zhongyu Hu Gencheng Han Yansong Sun | 2021 | Cellular & Molecular Immunology2021，18，4： | 5 |
| 3 | Production of aryl oxygen-containing compounds by catalytic pyrolysis of bagasse lignin over LaTi0.2Fe0.8O3 prepared by different methods显示文摘To realize the resource and high-value utilization,a new approach,named bagasse lignin(BL) used to produce aryl oxygen-containing compounds by catalytic pyrolysis over perovskite,was proposed,LaTi0.2Fe0.8O3(LTF) samples prepared by the sol-gel method(SG) and the solid-state reaction method(SS)were characterized.The catalytic action on BL pyrolysis was performed by the test of TG-DTG and the evaluation of the fixed bed micro-reactor,the components and contents of the products were determined.The results show that LTF samples have cubic perovskite phase,LTF prepared by SG(LTF-SG) is porous with larger specific surface area than LTF prepared by SS(LTF-SS).During the pyrolysis of BL,the addition of LTF lowers the pyrolysis temperature and the activation energy,the contents of CO2 and CO in gaseous products reduce by 4.6%-8.0% and 30.7%-34.3%,respectively,the total content of aryl oxygencontaining compounds(including phenolics,guaiacols,syringols and phenylates) in liquid products increases from 62 wt% to more than 72 wt%,and LTF-SG shows better catalytic performance.LTF samples have nice phase and catalytic stabilities for BL pyrolysis after five successive redox cycles. | Haiying Wang Hongjing Han Enhao Sun Yanan Zhang Jinxin Li Yanguang Chen Hua Song Hongzhi Zhao Yue Kang | 2020 | Journal of Rare Earths2020，38，1： | 5 |
| 4 | Production of aryl oxygen-containing compounds from catalytic pyrolysis of bagasse lignin over LaTixFe1xO3显示文摘A new approach,named production of aryl oxygen-containing compounds from the catalytic pyrolysis of bagasse lignin(BL) over perovskite oxide,was proposed,A series of LaTixFe1-xO3(LTF-x) samples were prepared by the solid state reaction method.The crystal phase and morphology of LTF-x were characterized by XRD and SEM respectively.Catalytic pyrolysis performance of LTF-x was performed by TG-DTG and the distribution patterns of gaseous,liquid and solid products from BL was investigated using a fixed-bed micro-reactor.The optimal reaction conditions were determined:the pyrolysis temperature was 600℃,the mass ratio of mBL:mLTF-0.2 was 3:1,the veloeity of earrier gas was 100 ml·min-1.The gaseous produets were mainly eomposed of CO2,CO,CH4 and CnHm(n=2-4,m=2 n+2 or m=2 n),The main aryl oxygen-containing compounds in liquid products were phenolics,guaiacols,syringols and phenylates,the rest were benzenes,furans,esters and carboxylic acid.The total contents of aryl oxygencontaining compounds were from 62% up to more than 72% under the action of the perovskite.Moreover,the LTF-0.2 sample had nice regenerability. | Haiying Wang Hongjing Han Enhao Sun Yanan Zhang Jinxin Li Yanguang Chen Hua Song Hongzhi Zhao | 2019 | Chinese Journal of Chemical Engineering2019，27，8： | 4 |
| 5 | Influence of calcination temperature for LaTi0.2Fe0.8O3 on catalytic pyrolysis of bagasse lignin显示文摘LaTi(0.2)Fe(0.8)O3(LTF)was prepared by the sol-gel method,and the effects of calcination temperature on the structure and properties were investigated,A new method of preparing aryl oxygen-containing compounds from bagasse lignin(BL)by the catalytic pyrolysis over LTF was proposed.The results show that LTF has cubic crystal phase and porous structure and its optimal calcination temperature is 800℃(LTF-800).In the test for catalytic pyrolysis of BL,with the addition of LTF-800,the yield of liquid product reaches the maximum;the contents of phenolics,guaiacols,syringols,phenylates and furans increase obviously,while those of benzenes,esters and carboxylic acid decrease.The total content of aryl oxygencompounds(including phenolics,guaiacols,syringols and phenylates)in liquid product is more than 74 wt%with the addition of LTF-800,larger than that obtained by single BL pyrolysis(62 wt%).LTF could avoid oxygen-containing functional groups from being excessively destroyed.It has nice regeneration performance by controlled combustion of char even after 5 cycles. | Haiying Wang Hongjing Han Yanan Zhang Jinxin Li Yanguang Chen Hua Song Enhao Sun Hongzhi Zhao Mei Zhang Dandan Yuan | 2019 | Journal of Rare Earths2019，37，8： | 3 |
| 6 | Basic fibroblast growth factor protects against influenza A virus-induced acute lung injury by recruiting neutrophils显示文摘Influenza virus (IAV)infection is a major cause of severe respiratory illness that affects almost every country in the world.IAV infections result in respiratory illness and even acute lung injury and death,but the underlying mechanisms responsible for IAV pathogenesis have not yet been fully elucidated.In this study,the basic fibroblast growth factor 2 (FGF2)level was markedly increased in H1N1 virus-infected humans and mice.FGF2,which is predominately derived from epithelial cells,recruits and activates neutrophils via the FGFR2-PI3K-AKT-NFKB signaling pathway.FGF2 depletion or knockout exacerbated influenzaassociated disease by impairing neutrophil recruitment and activation.More importantly,administration of the recombinant FGF2 protein significantly aUeviated the severity of IAV-induced lung injury and promoted the survival of IAV-infected mice.Based on the results from experiments in which neutrophils were depleted and adoptively transferred,FGF2 protected mice against IAV , infection by recruiting neutrophils.Thus,FGF2 plays a critical role in preventing IAV-induced lung injury,and FGF2 is a promising potential therapeutic target during IAV infection. | Keyu Wang Chengcai Lai Tieling Li Cheng Wang Wei Wang Bing Ni Changqing Bai Shaogeng Zhang Lina Han Hongjing Gu Zhongpeng Zhao Yueqiang Duan Xiaolan Yang Li Xing Lingna Zhao Shanshan Zhou Min Xia Chengyu Jiang Xiliang Wang Penghui Yang | 2018 | Journal of Molecular Cell Biology2018，10，6： | 3 |
| 7 | A new gain-of-function OsGS2/GRF4 allele generated by CRISPR/Cas9 genome editing increases rice grain size and yield显示文摘Grain size is one of the most important factors affecting rice grain quality and yield,and attracts great attention from molecular biologists and breeders.In this study,we engineered a CRISPR/Cas9 system targeting the miR396 recognition site of the rice GS2 gene,which encodes growth-regulating factor 4(OsGRF4)and regulates multiple agronomic traits including grain size,grain quality,nitrogen use efficiency,abiotic stress response,and seed shattering.In contrast to most previous genome editing efforts in which indel mutations were chosen to obtain null mutants,a mutant named GS2^(E) carrying an in-frame 6-bp deletion and 1-bp substitution within the miR396-targeted sequence was identified.GS2^(E) plants showed increased expression of GS2 in consistent with impaired repression by miR396.As expected,the gain-of-function GS2^(E) mutant exhibited multiple beneficial traits including increased grain size and yield and bigger grain length/width ratio.Thousand grain weight and grain yield per plant of GS2^(E) plants were increased by 23.5%and 10.4%,respectively.These improved traits were passed to hybrids in a semidominant way,suggesting that the new GS2^(E) allele has great potential in rice improvement.Taken together,we report new GS2 germplasm and describe a novel gene-editing strategy that can be widely employed to improve grain size and yield in rice.This trait-improvement strategy could be applied to other genes containing miRNA target sites,in particular the conserved miR396-GRF/GIF module that governs plant growth,development and environmental response. | Wenshu Wang Weipeng Wang Yanlin Pan Chao Tan Hongjing Li Ya Chen Xingdan Liu Jing Wei Nian Xu Yu Han Han Gu Rongjian Ye Qi Ding Chonglie Ma | 2022 | The Crop Journal2022，10，4： | 3 |
| 8 | Catalytic depolymerization of calcium lignosulfonate by NiMgFeO_x derived from sub-micron sized NiMgFe hydrotalcite prepared by introducing hydroxyl compounds显示文摘A new method for regulating the synthesis of Ni Mg Fe hydrotalcites(NMF LDHs) with the addition of hydroxyl compounds was proposed. A series of NMF LDHs were prepared by the above method, and then were calcined to obtain the Ni Mg FeOx(NMFOx) samples. The NMFOxsamples were characterized by XRD,SEM, TG-DTG, XPS and CO2-TPD, respectively. The catalytic performance of NMFOxfor depolymerizing calcium lignosulfonate(CLS) was evaluated by hydrothermal reaction. The results showed that the addition of hydroxyl compounds favored reducing the particle sizes of NMF LDHs. For the depolymerization of CSL, the yield of liquid product increased from 45% to 75.8% with the addition of NMFOx-ethanol(NMFOxET). The liquid products were mainly phenolics, aromatics, ketones and esters. The total selectivity of oxy-containing compounds was over 90.6%, among them, the phenolics were approximately 35.2%. The valence of Ni and Fe, crystalline phase and basicity almost remained unchanged. The NMFOx-ET samples were recycled for the depolymerization of CLS, moreover, the NMFOx-ET samples had high activity and stability after 4 cycles. | Hongjing Han Jinxin Li Haiying Wang Feng Xue Yanguang Chen Yanan Zhang Yizhen Wang Mei Zhang | 2019 | Chinese Journal of Chemical Engineering2019，27，8： | 3 |
| 9 | The outcomes of pregnancies after laparoscopic surgeries for pathologic changes on distal oviduct:A systematic review and meta-analysis显示文摘Objective This systematic review and meta-analysis were aimed to summarize the body of evidence on the prognosis after laparoscopic surgeries for pathological conditions on distal oviducts,then,furthermore,to evaluate prognostic factors for pregnancy outcomes.Methods We conducted a systematic review and meta-analysis to summarize the body of evidence on this topic,with the review question formulated as“what is the prognosis after the laparoscopic fimbrioplasty,salpingostomy,or salpingoneostomy for patients with pathologic conditions on the distal oviducts.”We searched Medline and EMBASE on June 1st,2020.Two investigators(HH and ZY)independently screened the references of all retrieved records for potentially eligible studies by firstly,through titles and abstract,and then full-text.A study would be included if it was a primary study reporting pregnancy outcomes of patients after laparascopic surgery.A meta-analysis of the rates of pregnancy,ectopic pregnancy,live birth,and miscarriage was performed using a random effect model.Results We identified 3861 records and included 21 reports with 2473 participants.The pooled estimate for the pregnancy rate was 35.1%(95%CI:30.7%–39.7%,I^(2)=78%,low certainty).The pooled estimates for the live birth rate,ectopic pregnancy rate,and miscarriage were 24.4%(95%CI:20.2%–28.8%,I^(2)=58%;1154 participants;low certainty),6.2%(95%CI:4.4%–8.2%,I^(2)=61%;2363 participants;low certainty),and 4.6%(95%CI:2.8%–6.9%,I^(2)=10%;544 participants;low certainty).Our analyses suggested that the more damaged tubal was associated with a decreased pregnancy rate,and patients with moderate or severe adhesion had lower pregnancy rates compared with patients with mild pelvic adhesion.Conclusion We estimated the pregnancy rate,ectopic pregnancy rate,and miscarriage rate of patients with distal tubal pathology after the laparoscopic fimbrioplasty or salpingostomy.Low certainty evidence suggested that laparoscopic surgery can restore the tubal function and cure infertility and should be considered as an alternative to in vitro fertilization.Tubal damage stage and adhesion are associated with worse pregnancy outcomes. | Hongjing Han Yuan Zhang Xiaoming Yu Xingbang Zheng Antoine Watrelot Jing Guan | 2021 | Gynecology and Obstetrics Clinical Medicine2021，1，1： | 0 |
| 10 | La and Sr Composite Oxides-modified Graphite Felt for Aqueous Organic Redox Flow Batteries显示文摘In this study,aqueous organic redox flow batteries(AORFBs)with NaCl as supporting electrolyte were investigated.In AORFBs,the chlorine evolution reaction should be retarded,not the hydrogen evolution reaction.To enhance the catalytic activity of the graphite fel(GF)electrode,the metal oxides were proposed to decorate on the GF surface.Among the loading oxides,significant enhancement of the mass transfer and reaction activity was obtained by the presence of LaSrOx nanoparticles.X-Ray photoclectron spectroscopy and contact angle measurements revealed that the content of oxygen-containing groups and the hydrophilicity were remarkably inereased.After the electrode assem-bled in the battery,the LaSrO/GF electrode presented huge enhancement of the battery performance,obviously increasing in the battery capacity and efficiency.At a current of 50 Am/cm^(2),the energy efficiency(EE)of the battery increased from 54.76%to 61.37%by the LaSrO/GF electrode.Furthermore,the cyclability of the system tested that no obviously fading was observed after 100 cycles,signifying the excellent stability of the LaSrOx/GF electrode. | WANG Hui LI Dan CHEN Liuping HAN Hongjing | 2020 | Chemical Research in Chinese Universities2020，36，6： | 0 |
| 11 | Production of phenolic compounds in catalytic pyrolysis of bagasse lignin in the presence of Ca_(0.5)Pr_(0.5)FeO_(3)显示文摘Herein,sodium dodecylbenzene sulfonate(SDBS)was used as a template to control the synthesis of Ca_(0.5)Pr_(0.5)FeO_(3).Its microstructure,composition,and morphology were detected via X-ray diffraction(XRD),Fourier transform infrared spectroscopy(FT-IR),and scanning electron microscopy(SEM).The properties of catalyzing bagasse lignin(BL)pyrolysis were determined by thermogravimetric analysis(TG)test and evaluation of a fixed bed alumina microreactor.The results show that the sample Ca_(0.5)Pr_(0.5)FeO_(3)regulated by SDBS has a cubic crystal phase,and the addition of SDBS does not cause phase transition.Moreover,when the SDBS concentration is 0.10 mol/L,the particle size is 200-500 nm and the specific surface area is 11.26 m^(2)/g.The yields of gas,liquid,and solid products in the BL catalytic pyrolysis are 39.58 wt%,26.76 wt%and 32.36 wt%,respectively.The contents of CO_(2)and CO decrease from 54.07%and 4.98%to 45.29%and 3.23%,respectively.The liquid products are mainly guaiacol,syringol,and phenol,and the total selectivity of phenols is 83.67%,accompanied by a small amount of non-aromatic oxygen-containing compounds(five-membered ring(furan)or ester).Compared with the BL pyrolysis and Ca_(0.5)Pr_(0.5)FeO_(3)catalytic pyrolysis products,the selectivity of guaiacol compounds increases by43.26%,while those of syringol compounds and phenylketones decrease by 30.08%and 3.39%,respectively.The selectivity of 2,6-dimethoxyphenol is 28.37%.After five catalytic pyrolysis-regeneration cycles,the characteristic peaks of the catalyst do not change significantly and the particles are uniform,suggesting that the catalyst has good crystal phase stability and regeneration stability. | Hongjing Han Qin Ge Mei Zhang Yanguang Chen Haiying Wang Yanan Zhang Yizhen Wang Hua Song Chunlei Zhang | 2022 | Journal of Rare Earths2022，40，2： | 0 |
| 12 | Chemical looping conversion of methane via Fe_(2)O_(3)-LaFeO_(3)calcined from LaFe-MOF precursor显示文摘The effective utilization of natural gas resources is a promising option for the implementation of the'dual carbon'strategy.However,the capture of carbon dioxide with relatively lower concentration after the combustion of natural gas is the crucial step.Fortunately,the lattice oxygen is used for chemical cycle conversion of methane to overcome the shortcomings mentioned above.A method was proposed to synthesize perovskite for methane cycle conversion using metal organic framework as a precursor.Morphology and pore structure of Fe_(2)O_(3)-LaFeO_(3)composite oxides were regulated by precursor synthesis conditions and calcination process.Moreover,the chemical looping conversion performance of methane was evaluated.The results showed that the pure phase precursor of La[Fe(CN)_(6)]·5H_(2)O was synthesized with the specific surface area of 23.91 m^(2)·g^(-1)under the crystallization of 10 h and the pH value of10.5.Fe_(2)O_(3)-LaFeO_(3)was obtained by controlled calcination of La[Fe(CN)_(6)]·5H_(2)O and Fe_(2)O_(3)with variable mass ratio.The selectivity of CO_(2)can reach more than 99%under the optimal parameters of methane chemical looping conversion:m(Fe_(2)O_(3)):m(LaFeO_(3))=2:1,the reaction temperature is 900℃,the lattice oxygen conversion is less than 40%.Fe_(2)O_(3)-LaFeO_(3)still has good phase and structure stability after five redox reaction and regeneration cycles. | Jitong Deng Yongjun Zhang Xiaopeng Wang Wei Zhang Hongjing Han Haiying Wang Huimin Yuan Yanan Zhang Yanguang Chen | 2023 | Chinese Journal of Chemical Engineering2023，62，10： | 0 |
| 13 | Retroperitoneal para-aortic ectopic pregnancies:A review of reported cases显示文摘Objective:To gain insights into the diagnosis and treatment of retroperitoneal para-aortic ectopic pregnancies(RPEP).Methods:We conducted a review of the existing literature from the web of science,PubMed,and CNKI using the search terms'ectopic pregnancy'and'retroperitoneal.'The present review follows the Preferred Reporting Items for Systematic Reviews and Meta-Analysis(PRISMA)guidelines.Results:After applying the inclusion and exclusion criteria,we included a total of 54 relevant works,encompassing 55 cases.The studies have revealed that a history of artificial abortion,embryo transfer,salpingectomy,and uterine cavity operation,accounted for 65.5%(36/55)of the cases.Typical symptoms of RPEP include abdominal pain(43.6%,24/55)and vaginal bleeding(36.4%,20/55),with only 32.7%(18/55)of cases being asymptomatic.The most common sites of RPEP are the abdominal aorta and the inferior vena cava(74.5%,41/55).There were no statistically significant differences in the incidence of acute abdomen,diameter of the pregnancy sac,number of surgeries,and the time for postoperative hcG to normalize in different pregnant site.The most effective imaging examination for RPEP was found to be abdominal ultrasound(72.7%,40/55),and the most commonly used treatment method was laparoscopy surgery(55.3%,21/38).Conclusion:It is crucial to consider the possibility of RPEP when a pregnancy mass cannot be located during routine examinations.Expanding the scope of the scan may significantly expedite diagnosis and treatment. | Junxiang Ren Hongjing Han | 2023 | Gynecology and Obstetrics Clinical Medicine2023，3，4： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员