|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | TiO_(2) Nanocrystals Grown on Graphene as Advanced Photocatalytic Hybrid Materials显示文摘A graphene/TiO_(2) nanocrystals hybrid has been successfully prepared by directly growing TiO_(2) nanocrystals on graphene oxide(GO)sheets.The direct growth of the nanocrystals on GO sheets was achieved by a two-step method,in which TiO_(2) was first coated on GO sheets by hydrolysis and crystallized into anatase nanocrystals by hydrothermal treatment in the second step.Slow hydrolysis induced by the use of EtOH/H2O mixed solvent and addition of H2SO4 facilitates the selective growth of TiO_(2) on GO and suppresses growth of free TiO_(2) in solution.The method offers easy access to the GO/TiO_(2) nanocrystals hybrid with a uniform coating and strong interactions between TiO_(2) and the underlying GO sheets.The strong coupling gives advanced hybrid materials with various applications including photocatalysis.The prepared graphene/TiO_(2) nanocrystals hybrid has superior photocatalytic activity to other TiO_(2) materials in the degradation of rhodamine B,showing an impressive three-fold photocatalytic enhancement over P25.It is expected that the hybrid material could also be promising for various other applications including lithium ion batteries,where strong electrical coupling to TiO_(2) nanoparticles is essential. | Yongye Liang Hailiang Wang Hernan Sanchez Casalongue Zhuo Chen Hongjie Dai | 2010 | Nano Research2010，3，10： | 57 |
| 2 | 纤维素催化转化为高附加值化学品的研究进展(英文)显示文摘Currently,under huge pressure from energy demands and environmental problems,much attention is being paid to biomass conversion,which will play an important role in meeting the requirements for a sustainable society.As the most abundant biomass on earth, cellulose is usually used as the first research target for biomass conversion.In this review,the recalcitrant structure of cellulose is discussed and non-catalytic hydrolysis by hot-compressed water and catalytic hydrolysis using solid acids are then considered.We also review the catalytic conversion of cellulose into valuable chemicals including hexitols(sorbitol and mannitol),ethylene glycol,and related compounds using various heterogeneous catalysts. | Hirokazu KOBAYASHI Atsushi FUKUOKA | 2011 | 催化学报2011，32，5： | 13 |
| 3 | CHEMICAL CONSTITUENTS OF LONICERA MACRANTHOIDES HAND.-MAZZ Ⅰ.STRUCTURE OF MACRANTHOISIDE I显示文摘A new bisdesmosidic triterpene saponin,macranthoiside I,wasisolated from L.macranthoides.Its structure was determinedby chemical degradation and spectroscopic analysis. | Min CHEN Si Qi LUO Hui Ting LI Shanghai Institute of Pharmaceutical Industry Shanghai,200040 | 1990 | Chinese Chemical Letters1990，1，3： | 11 |
| 4 | SALVIANOLIC ACID G,A CAFFEIC ACID DIMER WITH A NOVEL TETRACYCLIC SKELETON显示文摘Salvianolic acid G,a caffeic acid dimer with a noveltetracyclic skeleton was isolated from the roots of Salviamiltiorrhiza.Its structure was elucidated by chemical and spectralanalysis,especially by 2D NMR analysis. | Chun Bo AI Lian Niang LI Institute of Materia Medica,Chinese Academy of Medical Sciences,Beijing 100050,China | 1991 | Chinese Chemical Letters1991，2，1： | 10 |
| 5 | Biodrying of municipal solid waste with high water content by combined hydrolytic-aerobic technology显示文摘The high water content of municipal solid waste(MSW)will reduce the effciency of mechanical sorting,consequently unfavorable for beneficial utilization.In this study,a combined hydrolytic-aerobic biodrying technology was introduced to remove water from MSW.The total water removals were proved to depend on the ventilation frequency and the temporal span in the hydrolytic stage. The ventilation frequency of 6 times/d was preferable in the hydrolytic stage.The hydrolytic span should not be prolonged more than 4 d.At this optimal scenario,the final water content was 50.5%reduced from the initial water content of 72.0%,presenting a high water removal effciency up to 78.5%.A positive correlation was observed between the organics losses and the water losses in both hydrolytic and aerobic stages(R=0.944,p<0.01).The evolutions of extracellular enzyme activities were shown to be consistent with the organics losses. | ZHANG, Dongqing HE, Pinjing SHAO, Liming JIN, Taifeng HAN, Jingyao | 2008 | Journal of Environmental Sciences2008，20，12： | 10 |
| 6 | Gas chromatography-mass spectrometry method for determination ofβ-propiolactone in human inactivated rabies vaccine and its hydrolysis analysis显示文摘A simple method was established for the determination of β-propiolactone(BPL) in human inactivated rabies vaccine by gas chromatography-mass spectrometry(GC-MS). The determination was performed on an Agilent HP-INNOWAX(30 m ? 0.32 mm i.d., 0.25 mm) capillary column at the temperature of 80 °C.Electrospray ionization(ESI) was used by selective ion detection at m/z 42. The temperature for ESI source and inlet was set at 230 °C and 200 °C, respectively. Helium was used as the carrier gas at a flow rate of 25.1 m L/min. The total run time was 8 min. Acetonitrile and other components in the sample did not interfere with the determination of BPL. The results showed good linearity of BPL in the range of0.50–10.01 μg/mL, with the limit of detection and the limit of quantification of 0.015 μg/mL and0.050 μg/mL, respectively. Satisfactory precision was achieved for the current developed method. The method was applied to detect 6 batches of vaccine samples, and the results indicated that the target analyte BPL was present in three batches of unpurified samples, but was not detected in the purified samples, indicating the test samples were qualified. The established method was proved to be simple,versatile and sensitive, which can meet the requirements of quality control of BPL in human inactivated rabies vaccine. | Shuo Lei Xun Gao Yang Sun Xiangyong Yu Longshan Zhao | 2018 | Journal of Pharmaceutical Analysis2018，8，6： | 5 |
| 7 | Co-Co304@carbon core-shells derived from metal-organic framework nanocrystals as efficient hydrogenevolution catalysts显示文摘Controllable pyrolysis of metal-organic frameworks (MOFs) in confined spacesis a promising strategy for the design and development of advanced functionalmaterials. In this study, Co-C0304@carbon composites were synthesized viapyrolysis of a Co-MOFs@glucose polymer (Co-MOFs@GP) followed by partialoxidation of Co nanoparticles (NPs). The pyrolysis of Co-MOFs@GP generated acore-shell structure composed of carbon shells and Co NPs. The controlled partialoxidation of Co NPs formed Co-Co304 heterojunctions confined in carbon shells.Compared with Co-MOFs@GP and Co@carbon-n (Co@C-n), Co-C0304@carbon-n(Co-Co304@C-n) exhibited higher catalytic activity during NaBH4 hydrolysis.Co-C0304@C-II provided a maximum specific H2 generation rate of5,360 mL.min-l.gco-1 at room temperature due to synergistic interactionsbetween Co and C0304 NPs. The Co NPs also endowed Co-C0304@C-n with theferromagnetism needed to complete the magnetic momentum transfer process. | Yanyan Liu Guosheng Han Xiaoyu Zhang Congcong Xing Chenxia Du Huaqiang Cao Baojun Li | 2017 | Nano Research2017，10，9： | 5 |
| 8 | Preparation of Highly Crystalline Microcrystalline Cellulose by Hydrolysis of Cellulose with Phosphotungstic Acid显示文摘Phosphotungstic acid(H_3PW_(12)O_(40), HPW), a kind of solid acid, is widely used for hydrolyzing cellulose to prepare microcrystalline cellulose(MCC). MCC is usually used in food, synthetic leather, chemical and pharmaceutical industries. The use of response surface methodology(RSM)can help avoid the random error caused by single factor experimental design,reduce test times and cost, and improve quality. The RSM was used in this study to determine the following optimal process conditions: H^+ molar quantity, 31 mmol/L; reaction temperature, 93℃; reaction time, 2 h; and solid to liquid ratio, 1∶38. Under these conditions, the crystallinity of MCC was77.4%. Thus, the use of RSM allows the preparation of MCC with higher performance and increased crystallinity. | Jing Wang JinBao Li MeiYun Zhang ShunXi Song DanDan Qiang | 2018 | Paper And Biomaterials2018，3，1： | 5 |
| 9 | Carbon disulfide hydrolysis over Fe-Cu/AC catalyst modified by cerium and lanthanum at low temperature显示文摘A series of coal-based active carbon(AC) catalysts loaded by Fe-Cu,Fe-Cu-Ce and Fe-Cu-La were prepared by the sol-gel method for carbon disulfide(CS2) hydrolysis and their performances for CS2 hydrolysis in a fixed-bed reactor were investigated in this work.The results showed that the kind of rare earth oxide and its content had obvious effect on hydrolysis removal of CS2.The effects of temperature,space velocity,CS2 concentration and O2 concentration were also discussed respectively.Furthermore,the suitable operating conditions were obtained.It was found that the poisoning of hydrolysis active sites could result in the formation of sulfuric acid on the catalyst surface. | 何丹 易红宏 唐晓龙 宁平 王红妍 赵顺征 | 2010 | Journal of Rare Earths2010，28，S1： | 5 |
| 10 | Correlating Fe source with Fe-N-C active site construction: Guidancefor rational design of high-performance ORR catalyst显示文摘Pyrolyzed Fe-N_X/C materials derived from Fe-doped ZIF-8 are recently emerged as promising alternatives to noble metal platinum-based catalysts towards oxygen reduction reaction(ORR) and elucidating the dependacne of Fe source on the active site structure and final ORR performance is highly desirbale for further development of these materials. Here, we designed and synthesized a series of Fe-N-C catalysts using ZIF-8 and various iron salts(Fe(acac)_3, FeCl_3, Fe(NO_3)_3) as precusors. We found that the iron precursors,mainly the molecular size, hydrolysis extent, do play a major role in determining the final morphology of Fe, namely forming the Fe-Nx coordination or Fe_3C nanoparticles, as well as the site density, therefore,significantly affecting the ORR activity. Among the three iron sources, Fe(acac)_3 is most advantageous to the preferential formation of single-atom Fe-Nx active sites and the derived catalyst demonstrated best ORR performance. | Liqin Gao Meiling Xiao Zhao Jin Changpeng Liu Jianbing Zhu Junjie Ge Wei Xing | 2018 | Journal of Energy Chemistry2018，27，6： | 4 |
| 11 | Service life prediction of AP/Al/HTPB solid rocket propellant with consideration of softening aging behavior显示文摘The aging behavior of softening composite solid propellant was investigated by measuring its mechanical and ballistic prosperities during prolonged storage at elevated and room temperatures. Accelerated aging was conducted at 65 °C for 231 days while the normal aging was performed at 25 ± 3 °C and relative humidity less than 50% for 8 years. The mechanical properties were obtained from uniaxial tensile tests for the aged propellant specimens while the ballistic properties were determined from static firing tests of subscale motors aged for 112 days at 65 °C. The mechanical results show that the maximum tensile strength and Young's modulus initially increase and subsequently decrease with increasing aging time, while the maximum tensile strain generally increases with increasing aging time. The ballistic properties like burning rate show a small change which cannot affect the ballistic performance. The experimental results show that the changes in the mechanical properties are significant during the aging period, but the burning rate does not undergo significant changes. From this study, it is observed that the propellant ages through a combination of reactions like post-cure, oxidative cross-linking, chain scission, and hydrolysis. The chain scission and the hydrolysis effect are the most significant process, which makes the propellant soft and extendible. The observed aging mechanism has been modeled using an exponential function with two terms which can describe the complex behavior of the aging. By applying Arrhenius equation,the activation energy values were obtained based on the propellant mechanical properties. The shelf life of this propellant formulation at 25 °C is predicted to be 13 years using the modulus as failure criteria and control parameter. | Walid M.ADEL Guozhu LIANG | 2019 | Chinese Journal of Aeronautics2019，32，2： | 4 |
| 12 | HETEROPHYLLIN-A AND B,TWO CYCLOPEPTIDES,FROM THE ROOTS OF PSEUDOSTELLARIA HETEROPHYLLA显示文摘Two cyclopeptides,heterophyllin A and B,have been isolated from the rootsof Pseudostellaria heterophylla.Their structures were elucidated by chemical,spectroscopic,and enzymatic methods. | Ning Hua TAN Shou Xun ZHAO a Department of Phytochemistry,China Pharmaceutical University,Nanjing,210009 Jun ZHOU Hong Jie ZHANG De Zu WANG Chang Xiang CHEN Xiao Zhu LIU b Laboratory of Phytochemistry,Kunming Institute of Botany,Academia Sinica,Kunming,650204 | 1992 | Chinese Chemical Letters1992，3，8： | 4 |
| 13 | Highly Efficient Synthesis of Environmentally Friendly Ag-modified TiO2 Nanoflowers to Enhance Photocatalytic Performance显示文摘Ag-modified TiO2 nanoflowers were prepared using a two-step process. The experimental process is green and free from contamination and can be synthesized directly at room temperature. Compared with pure TiO2, Ag-modified TiO2 enhances the absorption of visible light and effectively promotes the detachment of photoelectron pairs, Ag-TiO2 has a significantly enhanced visible light response activity to photodecomposition of methyl orange(MO). It is shown that the strong interaction between Ag nanoparticles and TiO2 enhances the photocatalytic activity of TiO2 nanoflowers. The self-made open-air reactor was used to test the photocatalytic performance of different samples. The results showed that Ag-modified TiO2 nanoflowers had excellent photodegradation ability. After repeated photodegradation of MO, Ag-modified TiO2 nanoflowers showed good stability. | 李洋 CAI Lun WU Hongbiao HUANG Qilin DU Yiming LIU Shiqiu SHENG Zongqiang CHEN Changzhao | 2019 | Journal of Wuhan University of Technology(Materials Science)2019，34，6： | 3 |
| 14 | Optimization and kinetic studies for enzymatic hydrolysis and fermentation of colocynthis vulgaris Shrad seeds shell for bioethanol production显示文摘The key process parameters for the hydrolysis and fermentation of Colocynthis vulgaris Shrad seeds shell(CVSSS)were optimized using the Box-Behnken Design(BBD)of Response Surface Methodology(RSM).Kinetic study was also carried out.The proximate analysis of the CVSSS was done by the method of the Association of Organic and Applied Chemistry(AOAC).Enzymatic hydrolysis was experimented by using Aspergillus Niger as a crude enzyme isolated from soil at sawdust dump site and screened for cellulosic activities.Factors that affected the hydrolysis of the CVSSS were screened by using the Greco-Latin square design of experiment.However,for Saccharomyces cerevisiae,factors that affected the fermentation of the CVSSS were screened by using the same Greco-Latin square design of experiment.Meanwhile,the result of the proximate analysis revealed that the CVSSS had 73.54%cellulose which could be converted to bioethanol.It was established that temperature,pH and time had significant effect on hydrolysis,while the optimum results were obtained at 46.8℃,3.32 d,5.68 and 59.87%for temperature,time,pH and glucose yield,respectively.Temperature,yeast dosage,pH and time had significant effect on fermentation,while the optimum results from optimization were found to be 33.58℃,7.0,3.55 d,1.65 g per 50 mL and 25.6%for temperature,pH,time,yeast dosage and ethanol yield,respectively.The kinetics of both the enzymatic hydrolysis and fermentation agreed with the Michealis-Menten kinetic model with the correlation coefficients(R^(2))of 0.9708 and 0.8773,respectively.However,from the error analysis,the experimental and predicted values had a very good relationship as described by Michaelis-Menten model. | Igwilo Christopher Nnaemeka Egbuna Samuel O Onoh Maxwell I Asadu OChristain Onyekwulu Chinelo S | 2021 | Journal of Bioresources and Bioproducts2021，6，1： | 3 |
| 15 | Oscillating Cellulase Adsorption and Enhanced Lignocellulose Hydrolysis upon Ultrasound Treatment显示文摘We investigated the effects of ultrasound treatment on cellulase adsorption and lignocellulose hydrolysis.The activity of cellulase remained constant upon lowpower ultrasound treatment(<120 W) and decreased using high-power ultrasound(>280 W).Oscillating cellulase adsorption occurred upon ultrasound treatment with any intensity.The maxima for desorption and adsorption were41.9 and 83.1%,respectively,during 1 h of 90 W ultrasound treatment at 50 °C.A comparison between the shorttime with long-time ultrasound experiments indicated that ultrasound treatment tended to desorb cellulase from substrate.However,ultrasound treatment also led to further surface erosion of biomass,which increased cellulase accessibility.These joint actions of ultrasound treatment induced the oscillating adsorption of cellulase.The increase in cellulase accessibility caused by ultrasound treatment led to a significant enhancement in lignocellulose hydrolysis. | Rongxin Su Renjun Yang Yang Jifeng Ruoyu Du Renliang Huang Wei Qi Zhimin He | 2017 | Transactions of Tianjin University2017，23，1： | 3 |
| 16 | Pretreatment of agricultural residues by supercritical CO_2 at 50–80 °C to enhance enzymatic hydrolysis显示文摘Various agricultural crop residues including corn stover,corn cob,and sorghum stalk with a moisture content of 75 wt%were subjected to a long pretreatment(12–60 h)with supercritical CO_2(scCO_2),at low temperature(50–80°C)and a pressure of 17.5–25.0 MPa.The sugar yields from the enzymatic hydrolysis(EH)of the pretreated samples were as much as three-to fourfold greater than those afforded by the raw materials.However,when pretreatment was conducted within a short time(e.g.0.5 h),as previously reported in the literature,only a slight increase in the EH sugar yields was observed.The proposed sc CO_2pretreatment mechanism demonstrated the role of moisture in the system.Wetting,softening,and swelling were observed to mainly affect the lignocellulose when a suitable amount of water was added.Finally,the samples were analysed by X-ray diffraction and scanning electron microscopy,before and after pretreatment,to investigate the changes in the microscopic structure of the biomass. | Meng-jiao Zhao Qin-qin Xu Guo-min Li Qiao-zhi Zhang Dan Zhou Jian-zhong Yin Hua-shu Zhan | 2019 | Journal of Energy Chemistry2019，28，4： | 3 |
| 17 | Species analysis methods for hydrolysis polymerization of aluminum显示文摘SpeciesanalysismethodsforhydrolysispolymerizationofaluminumFengLi,LuanZhaokun,TangHongxiaoResearchCenterforEcoEnvironmenta... | Feng Li, Luan Zhao kun, Tang Hong xiao Research Center for Eco Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China | 1998 | Journal of Environmental Sciences1998，10，1： | 3 |
| 18 | Bioactive peptides: A review显示文摘Bioactive peptides(BP)are organic substances formed by amino acids joined by covalent bonds known as amide or peptide bonds.Although some BP exist free in its natural source,the vast majority of known BP are encrypted in the structure of the parent proteins and are released mainly by enzymatic processes.Some BP have been prepared by chemical synthesis.BP play a significant role in human health by affecting the digestive,endocrine,cardiovascular,immune,and nervous systems.BP are considered the new generation of biologically active regulators;they can prevent oxidation and microbial degradation in foods and also improve the treatment of various diseases and disorders,thus increasing the quality of life.The growing interest in BP has incentivized the scientific community and the food industry to exploring the development of new food additives and functional products based on these peptides.The present review highlights the recent findings on the identification,bioassays,and use of BP,as well as their potential use as food additives and in the development of functional products. | Adrián Sánchez Alfredo Vázquez | 2017 | Food Quality and Safety2017，1，1： | 3 |
| 19 | The Effect of Hydrolysis with Neutrase on Molecular Weight,Functional Properties,and Antioxidant Activities of Alaska Pollock Protein Isolate显示文摘In this study, the Alaska pollock protein isolate(APPI) was hydrolyzed by Neutrase for 20, 40, 80, 120, 160, 200, and 240 min. Hydrolysates with different molecular weights were produced and they were named as H1–H7. Furthermore, the effects of hydrolysis on the average molecular weights, functional properties(solubility, oil-holding capacities, foaming activities, and emulsifying properties), and antioxidant activities(1, 1-diphenyl-2-picrylhydrazyl, superoxide, and hydroxyl free radical-scavenging activities) were determined. It was found that when the degree of hydrolysis(DH) increased, the average molecular weights of the hydrolysates decreased significantly. The functional properties of APPI were also significantly improved. The hydrolysates of APPI exhibited better solubility, emulsifying activities, and foaming activities. Hydrolysates with low molecular weights(<1 kDa) had better solubility, oil-holding capacities, and emulsifying activities, while hydrolysates with higher molecular weights(>1 kDa) had better foaming activities. In addition, the hydrolysates exhibited excellent antioxidant properties, while the inhibition values of 1, 1-diphenyl-2-picryl hydroxyl(DPPH), superoxide, and hydroxyl free radical-scavenging activities, were 85.22%, 53.56%, and 75.00% respectively, when the concentration of the hydrolysates was 5.0 mg mL^(-1). The lower the average molecular weight was, the higher was the antioxidant activity. These results indicated that hydrolysis with Neutrase is an effective method for improving the functional and antioxidant properties of APPI. The hydrolysates of APPI displayed great potentials to be used as natural antioxidants in protein-rich aqueous foods such as nutrient supplements and sports beverages. | LIU Chuyi MA Xiaoming CHE Shuai WANG Changwei LI Bafang | 2018 | Journal of Ocean University of China2018，17，6： | 3 |
| 20 | Effects of hydrolysis and bacterial degradation in the cells on hydrocarbons and biomarkers generated by pyrolysis of green alga Chlorella protothecoides显示文摘The relative contents of normal alkanes and isoprenoid alkanes from pyrolysed products of green alga Chlorella protothecoides increased when the algal cell subject to hydrolysis and bacterial degradation were used. Their value of C 23 -/C 24 + and the rate of Pr/C 17 increased greatly whereas the contents of C 20 alkenes were remarkably low compared with that from untreated sample (as control). These results are more analogous to the formation process of hydrocarbons derived from algae in natural geological environment. | Qingyu Wu Bin Zhang Yitao Song Guoying Sheng Jiamo Fu | 1998 | Chinese Science Bulletin1998，43，9： | 3 |
您所在的机构暂未开通此部分的功能，请联系管理员