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Hard carbon derived from rice husk as low cost negative electrodes in Na-ion batteries 预览
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作者 Maria K.Rybarczyk Yunming Li +3 位作者 Mo Qiao Yong-Sheng Hu Maria-Magdalena Titirici Marek Lieder 《能源化学:英文版》 SCIE EI CAS CSCD 2019年第2期17-22,共6页
Here,we report the synthesis of hard carbon materials(RH) made from natural rice husk through a single pyrolysis process and their application as an anode in sodium-ion batteries.The studies show that the electrochemi... Here,we report the synthesis of hard carbon materials(RH) made from natural rice husk through a single pyrolysis process and their application as an anode in sodium-ion batteries.The studies show that the electrochemical properties of RHs are affected by the treatment temperatures,which determine the materials morphology,in particular,their degree of graphitization and extent of continuous channels(nanovoids).The latter are accessible to sodium ions and significantly contribute to charge storage capacity of the produced anodes.The RHs obtained at 1600 °C deliver the highest reversible capacity of276 mAh g-1 mainly due to insertion of sodium ions into the nanovoids.This work deepens the basic understanding of the influence of the carbonization temperature on the sodium storage mechanism. 展开更多
关键词 Nanovoids in RICE husk SUSTAINABLE energy STORAGE Na-ion BATTERIES
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Chemical Constituents and Antitumor Activities of Walnut Green Husk 预览
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作者 Fulin YAN Tiantian YIN 《药用植物研究(英文版)》 2019年第2期17-20,24共5页
[Objectives] To identify chemical constituents and antitumor activities of walnut green husk.[Methods] The column chromatography and recrystallization were used to isolate 13 compounds from walnut green husk, and thei... [Objectives] To identify chemical constituents and antitumor activities of walnut green husk.[Methods] The column chromatography and recrystallization were used to isolate 13 compounds from walnut green husk, and their structures were identified by modern spectroscopy.[Results] The 13 kinds of compounds isolated from walnut green husk were identified as 3, 5-dimethoxy-4-hydroxy benzene carbonic-7-O-β-D-pyranglucose(1), myricananin F(2),β-stitosterol(3), oleanolic acid(4), regiolone(5), asiatic acid(6), hederagenin(7),β-daucosterin(8),(4 R)-4,8-dihydroxy-α-tetralone-4-O-β-D-glucopyranoside(9), 3β, 23-dihydroxy-urs-12-en-28-oic acid(10), ursolic acid(11), syringc acid(12), and Juglanoside B(13). Among these, compounds 1, 2, 6, 7, 9, and 10 were all isolated from this genus of plant for the first time.[Conclusions] Through screening for antitumor activity in vitro, it was found that compound 4 showed strong growth inhibitory activity against the proliferation of human hepatoma cells(HepG-2), and compound 9 had certain growth inhibitory activity against the proliferation of human breast cancer cells(MCF-7). 展开更多
关键词 WALNUT green husk JUGLANDACEAE CHEMICAL constituents ANTITUMOR ACTIVITIES
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Effect of removing silica in rice husk for the preparation of activated carbon for supercapacitor applications
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作者 Dechen Liu Wenli Zhang Weimin Huang 《中国化学快报:英文版》 SCIE CAS CSCD 2019年第6期1315-1319,共5页
Renewable biomass-derived activated carbons have attracted attentions for supercapacitor applications. Rice husk is a kind of abundant biomass, which has been studied for the preparation of hierarchical activated carb... Renewable biomass-derived activated carbons have attracted attentions for supercapacitor applications. Rice husk is a kind of abundant biomass, which has been studied for the preparation of hierarchical activated carbons. Rice husk is rich in silica. Silica in rice husk affects the formation of pore structure in the KOH activation process, which further affects the electrochemical performance of the resultant activated carbon for supercapacitors. In this paper, the effects of silica in rice husk on the activation process were investigated. When the silica in rice husk is not removed, KOH preferentially reacts with silica to produce silicate, which hinders the formation and enlargement of mesopores;the obtained activated carbon exhibits high microporous ratio, high specific area (up to 3263 m^2/g), high specific capacitance (315 F/g at 0.5 A/g), but poor rate capability (51.7%capacitance retention with increasing the current density from 0.5 A/g to 20 A/g). When the silica in rice husk is removed, the pores produced by the removal of silica are etched to mesopores in activation process;the obtained activated carbon exhibits high mesoporous ratio, relative high specific surface area of 2804 m2/g and relative high capacitance of 278 F/g at 0.5 A/g with excellent rate capability (76.6%capacitance retention with increasing the current density from 0.5 A/g to 20 A/g). 展开更多
关键词 SILICA Rice husk KOH activation PORE structure Supercapactiors
CO2气氛下谷壳热解炭物化结构演变特性 预览
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作者 王严严 董继先 +1 位作者 张斌 娄瑞 《陕西科技大学学报》 CAS 2019年第3期47-52,共6页
以农林废弃物谷壳为原料,在600℃~850℃范围内进行了慢速热解得到热解炭,并又以CO2为气化剂进行了气化实验,运用SEM、BET和XRD等检测仪器对气化前后热解炭得率、吸附能力、比表面积、表面形貌以及结晶度等理化性质进行了表征分析.结果表... 以农林废弃物谷壳为原料,在600℃~850℃范围内进行了慢速热解得到热解炭,并又以CO2为气化剂进行了气化实验,运用SEM、BET和XRD等检测仪器对气化前后热解炭得率、吸附能力、比表面积、表面形貌以及结晶度等理化性质进行了表征分析.结果表明:CO2气化后热解炭得率下降,且在750℃时下降更快;气化后热解炭孔结构发育更加完全,表面孔数量丰富均匀,吸附能力提高,比表面积在温度为850℃时,高达302.9192m^2/g;气化前后,热解炭微晶直径(La)变化不大,但结晶度(CrI)、微晶平均堆积厚度(Lc)都有所减小,说明气化加快了反应过程中热解炭芳香层结构的分解. 展开更多
关键词 谷壳 热解炭 气化剂 结晶度
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Strength and compressibility behaviors of expansive soil treated with coffee husk ash 预览
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作者 M.K.Atahu F.Saathoff A.Gebissa 《岩石力学与岩土工程学报:英文版》 CSCD 2019年第2期337-348,共12页
Various factors can affect the durability of roads,such as the strength of sub-grade,the quality of the subbase and base course,the environments and properties of the soil used.Particularly,roads built on expansive so... Various factors can affect the durability of roads,such as the strength of sub-grade,the quality of the subbase and base course,the environments and properties of the soil used.Particularly,roads built on expansive soil are susceptible to early damage due to the swelling and shrinkage characteristics of this kind of soil under changing moisture conditions.The most common technique used to improve the properties of problematic soil is stabilization with additives.Using waste materials to improve the properties of expansive soil is a recent trend in soil stabilization.This study deals with the treatment of expansive soil with coffee husk ash(CHA).Coffee husk is a by-product of coffee production,and CHA is the resulting ash after burning it.In this study,the bearing capacity and compressibility characteristics of expansive soil(specifically black cotton(BC)soil)stabilized with varying percentages of CHA(5%,10%,15%,and 20%)are investigated.Then,scanning electron microscopy(SEM)and energy dispersive X-ray(EDX)were used to analyze the influence of CHA on surface morphology and chemical composition of the studied soil.The results showed that the soil treated with CHA is generally improved in terms of strength.Addition of 20%CHA increases the bearing capacity of the soil by three-fold.In addition,the morphological studies of the soil samples treated with 10%and 15%CHA indicated the formation of hydrated particles and cementitious compounds as a result of the reaction between the soil and CHA.This indicates the potential usage of CHA as a stabilization agent and subsequently,it can address the disposal and environmental concerns related to coffee husk. 展开更多
关键词 Black cotton(BC)soil COFFEE husk Stabilization California bearing ratio(CBR) CONSOLIDATION SCANNING electron microscopy(SEM)
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大曲酱香型白酒生产中辅料的应用研究 预览
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作者 涂昌华 汪地强 +2 位作者 吉小超 王成叶 王宗强 《酿酒科技》 2019年第8期72-74,共3页
简要介绍了谷壳、稻草和封窖泥等辅料在大曲酱香型白酒生产中的作用、选用标准以及应用方法。
关键词 谷壳 稻草 封窖泥
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Strategies for Fermentable Sugar Production by Using Pressurized Acid Hydrolysis for Rice Husks 预览
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作者 Giovanni B.PEDROSO Michael R.PHILIPPSEN +2 位作者 Loisleini F.SALDANHA Raiara B.ARAUJO Ayrton F.MARTINS 《水稻科学:英文版》 CSCD 2019年第5期319-330,共12页
This study investigated the use of leftover biomass(rice husks)as the raw material for the biotechnological production of platform chemicals and biopolymers.Following the biorefinery concept,different acid hydrolysate... This study investigated the use of leftover biomass(rice husks)as the raw material for the biotechnological production of platform chemicals and biopolymers.Following the biorefinery concept,different acid hydrolysates were studied and resulted into a wide range of treatment strategies.Chemometrics were applied throughout the procedures in multivariate experimental conditions.By using the best hydrolytic conditions of 6.0%H3PO4,135ºC(45 MPa)and reaction time of 62 min,21.0 g/L sugar hydrolysates were produced;by using the best hydrolytic condition of 4.5%HNO3,135ºC/35 min,16.1 g/L sugar hydrolysates were produced;and with the hydrolysates use of 1.5%H2SO4 and 1.5%HCl,135ºC/62 min,18.2 and 17.8 g/L sugar hydrolysates were produced,respectively.The highest productivity,in terms of fermentable sugars,reached 68%of integral cellulose/hemicellulose fraction and surpassed those found in the literature,with regard to the processing of rice husks,by considering just one step process.Sulfuric hydrolysate,detoxified with active carbon,was used to prove this proposal viability,resulting in a fermentation substrate for A.terreus(ATCC10020)and R.radiobacter(LMG196)strains(natural producers of bioproducts),which certified the feasibility of the proposal.The production of fermentable sugars from leftover biomass should encourage a search for new bioconversion routes,which can result in economic and environmental benefits and a spread of knowledge. 展开更多
关键词 BIOREFINERY multivariate design pressurized acid hydrolysis rice husk SUGAR
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去苞叶对玉米子粒脱水过程的影响 被引量:1
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作者 李璐璐 谢瑞芝 +3 位作者 王克如 明博 侯鹏 李少昆 《作物杂志》 北大核心 2018年第2期114-117,共4页
为明确苞叶层数对玉米子粒脱水过程的影响,2015—2016年以郑单958和先玉335为试验材料,设置乳熟期(授粉后25-26d)不同程度去苞叶处理,分析苞叶层数对子粒含水率的影响。结果显示:(1)去除1层、2层和3层苞叶后,子粒含水率与同一... 为明确苞叶层数对玉米子粒脱水过程的影响,2015—2016年以郑单958和先玉335为试验材料,设置乳熟期(授粉后25-26d)不同程度去苞叶处理,分析苞叶层数对子粒含水率的影响。结果显示:(1)去除1层、2层和3层苞叶后,子粒含水率与同一时期不去苞叶对照差异不显著;去除4~6层苞叶后,子粒脱水过程受到不同程度的影响;去除全部苞叶后,子粒含水率在测定期间始终显著低于对照处理,2个品种表现一致。(2)去除全部苞叶后,郑单958和先玉335百粒干重显著下降,降幅为9.77%~13.29%和15.40%-16.37%,而其他去苞叶处理的百粒干重与对照无显著差异。结论:去除全部苞叶后显著降低百粒干重,生产中应慎重过早扒去全部苞叶;适当减少苞叶层数有利于子粒脱水,且不降低子粒重量,在选育脱水快、适合机械粒收的品种时应予以考虑。 展开更多
关键词 玉米 苞叶 苞叶层数 子粒含水率
不同类群玉米自交系苞叶性状的差异分析 预览
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作者 贺文姝 张海波 +3 位作者 孙宏蕾 阮燕晔 崔震海 张立军 《华中农业大学学报》 CSCD 北大核心 2018年第4期30-35,共6页
为改良苞叶性状、选育适合机械收获籽粒的玉米品种,测定了我国五大类群玉米在2种不同环境下的苞叶性状,分析各性状的遗传特性和各个类群之间苞叶性状的差异及环境对各个类群不同苞叶性状的影响。结果表明:苞叶性状主要受遗传因素控制且... 为改良苞叶性状、选育适合机械收获籽粒的玉米品种,测定了我国五大类群玉米在2种不同环境下的苞叶性状,分析各性状的遗传特性和各个类群之间苞叶性状的差异及环境对各个类群不同苞叶性状的影响。结果表明:苞叶性状主要受遗传因素控制且变异广泛,其中苞叶长度具有高遗传力,苞叶数量、苞叶总厚度和苞叶宽度具有中等遗传力;苞叶长度与苞叶宽度达极显著正相关;不同类群间玉米苞叶性状存在显著差异,其中苞叶长度差异最显著,苞叶宽度和苞叶数量次之,苞叶总厚度无显著差异;除兰卡斯特苞叶总厚度外,各个类群的苞叶性状受环境的影响较小。因此,在育种中多数苞叶性状可直接进行遗传改良,并且以一个性状为主目标的改良可达到与之相关的其他苞叶性状改良的效果;兰卡斯特和唐四平头的苞叶数量不多且长度适中,可作为苞叶性状改良的重要种质来源。 展开更多
关键词 玉米 苞叶 籽粒含水量 苞叶覆盖度 遗传特性 相关分析
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河南南阳地产绿米稻壳中花青素的提取工艺研究 预览
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作者 孙美玲 梁月洋 +1 位作者 王红朵 张仲鸣 《中国农学通报》 2018年第18期71-76,共6页
旨在探索水稻品种‘南阳绿米’稻壳中花青素的最适提取条件。利用0.1 mol/L的盐酸乙醇连续提取3次,依据530、620、650 nm波长下的光吸收值和Greey公式计算出花青素含量,分析了乙醇浓度、温度、提取时间和料液比等单因素对提取量的影响;... 旨在探索水稻品种‘南阳绿米’稻壳中花青素的最适提取条件。利用0.1 mol/L的盐酸乙醇连续提取3次,依据530、620、650 nm波长下的光吸收值和Greey公式计算出花青素含量,分析了乙醇浓度、温度、提取时间和料液比等单因素对提取量的影响;在此基础上,设计了四因素三水平的正交试验,并利用正交分析法确定最优化的提取条件组合。结果表明,最佳提取效果的条件组合为乙醇浓度60%、温度60℃、提取时间为9 h、料液比为1:20,在此条件下,100 g稻壳可提取的花青素量为588.41 mg,由此推测,‘南阳绿米’的稻壳中可得到约13 kg/hm^2的花青素。因此,‘南阳绿米’稻壳中的花青素含量值得提取,‘南阳绿米’是一个具有附加经济效益的新品种,值得推广种植。 展开更多
关键词 南阳绿米 稻壳 花青素 提取工艺 酸化乙醇
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基于DPPH清除自由基的两面针果壳提取物抗氧化活性评价
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作者 黄周锋 蒋珍藕 +2 位作者 胡筱希 陆国寿 赖茂祥 《中医药导报》 2018年第21期75-77,共3页
目的:对两面针果壳提取物抗氧化活性进行初步评价。方法:通过测定两面针果壳中3种提取物对DPPH自由基的清除能力,以半数清除浓度(IC50)值作为评价清除DPPH自由基能力的指标。结果:两面针果壳水提取(IC501.68 mg/mL)强于80%乙醇... 目的:对两面针果壳提取物抗氧化活性进行初步评价。方法:通过测定两面针果壳中3种提取物对DPPH自由基的清除能力,以半数清除浓度(IC50)值作为评价清除DPPH自由基能力的指标。结果:两面针果壳水提取(IC501.68 mg/mL)强于80%乙醇提取物的DPPH自由基清除能力(IC502.93 mg/mL),挥发油清除自由基能力不明显。结论:两面针果壳起抗氧化作用的物质可能与水溶性物质有关,本实验方法简便、快捷,为两面针扩大药用部位提供实验依据。 展开更多
关键词 两面针 果壳 DPPH自由基 抗氧化活性
谷壳作为Pb(Ⅱ)离子吸附剂的改性剂优选 预览
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作者 汤琪 涂胜 +3 位作者 王孝华 刘攀 李传强 吴晓燕 《应用化工》 CSCD 北大核心 2017年第5期871-874,共4页
对比了改性剂改性谷壳对Pb2+的吸附效果。改性碱化谷壳对Pb2+的吸附率高于改性未碱化谷壳。各种改性谷壳对Pb2+的吸附率高低排序为:苯胺改性谷壳〉环氧氯丙烷加乙二胺改性谷壳〉双氧水改性谷壳〉乙二胺改性谷壳〉甲醛改性谷壳〉高... 对比了改性剂改性谷壳对Pb2+的吸附效果。改性碱化谷壳对Pb2+的吸附率高于改性未碱化谷壳。各种改性谷壳对Pb2+的吸附率高低排序为:苯胺改性谷壳〉环氧氯丙烷加乙二胺改性谷壳〉双氧水改性谷壳〉乙二胺改性谷壳〉甲醛改性谷壳〉高锰酸钾改性谷壳〉双氧水加乙二胺改性谷壳〉环氧氯丙烷改性谷壳〉硝酸改性谷壳〉柠檬酸改性谷壳〉磷酸改性谷壳。综合兼顾对Pb2+的吸附效果,改性工艺环保性、复杂性,成本高低,各种改性剂的综合性能优劣排序为:双氧水〉高锰酸钾〉苯胺〉柠檬酸〉甲醛〉硝酸〉磷酸〉双氧水加乙二胺〉环氧氯丙烷〉乙二胺〉环氧氯丙烷加乙二胺。双氧水是综合性能最好的改性剂。 展开更多
关键词 谷壳 Pb(Ⅱ) 优选 改性剂
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Processing Methods of Alkaline Hydrolysate from Rice Husk 预览
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作者 Olga D.AREFIEVA Liudmila A.ZEMNUKHOVA +1 位作者 Anastasia A.KOVSHUN Anna V.KOVEKHOVA 《水稻科学:英文版》 CSCD 2017年第4期235-240,共6页
This paper devoted to finding processing methods of alkaline hydrolysate produced from rice husk pre-extraction, and discusses alkaline hydrolysate processing schemed and disengagement of some products: amorphous sili... This paper devoted to finding processing methods of alkaline hydrolysate produced from rice husk pre-extraction, and discusses alkaline hydrolysate processing schemed and disengagement of some products: amorphous silica of various quality, alkaline lignin, and water and alkaline extraction polysaccharides. Silica samples were characterized: crude(air-dried), burnt(no preliminary water treatment), washed in distilled water, and washed in distilled water and burnt. Waste water parameters upon the extraction of solids from alkaline hydrolysate dropped a few dozens or thousand times depending on the applied processing method. Color decreased a few thousand times, turbidity was virtually eliminated, chemical oxygen demanded about 20–136 times; polyphenols content might decrease 50% or be virtually eliminated. The most prospective scheme obtained the two following solid products from rice husk alkaline hydrolysate: amorphous silica and alkaline extraction polysaccharide. Chemical oxygen demand of the remaining waste water decreased about 140 times compared to the silica-free solution. 展开更多
关键词 碱性水解 水解物 加工方法 无定形二氧化硅 化学需氧量 预处理方法 碱提取 水解处理
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Corn Husk Fiber Preparation and Morphology with Alkali Treatment 预览
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作者 严涛海 李永贵 +2 位作者 张默涵 蒋金华 陈南梁 《东华大学学报:英文版》 EI CAS 2016年第4期574-578,共5页
The corn husks were usually discarded as useless materials,after alkali treatment from which the corn husk fiber was obtained. The corn husk fiber included half degumming corn husk bundle fiber and corn husk single fi... The corn husks were usually discarded as useless materials,after alkali treatment from which the corn husk fiber was obtained. The corn husk fiber included half degumming corn husk bundle fiber and corn husk single fiber. This study found that corn husk single fiber was a kind of cellulose fiber,and was obtained with the fully alkali treatment technique,the process of which was NaOH concentration 0.15 g/mL,temperature at 80℃,and reaction time about 2.5 h. The morphologies of corn husk single fibers presented nature convolutions along with the fiber axis. They were closed at both ends,and they had a pentagram cavity and oval-shaped crosssection. They were flat shape,the fineness of the fibers was close to cotton fiber,and the mechanical properties of the fibers were similar to hemp fiber. So the corn husk fibers could be predicted that they could be used in textile industry because their properties were very close to cotton fiber or flax fiber. 展开更多
关键词 corn husk FIBER alkali treatment MORPHOLOGY PROPERTY
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稻谷壳制备石墨烯纳米片及结构表征 预览 被引量:5
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作者 程金生 万维宏 +1 位作者 陈信炎 郑启祥 《农业工程学报》 EI CAS CSCD 北大核心 2015年第12期288-294,共7页
为了充分利用南方丰富的稻谷壳资源,制备附加值较高的石墨烯纳米材料。该文采用稻谷壳可再生资源经高温炭化、过筛、透析等工艺等制备活性炭,将其在高纯氩保护下高温催化石墨化后制备的石墨微晶作为石墨烯的新型碳源。应用具有较大离子... 为了充分利用南方丰富的稻谷壳资源,制备附加值较高的石墨烯纳米材料。该文采用稻谷壳可再生资源经高温炭化、过筛、透析等工艺等制备活性炭,将其在高纯氩保护下高温催化石墨化后制备的石墨微晶作为石墨烯的新型碳源。应用具有较大离子半径的硫酸根离子(0.295 nm)为插层剂预处理该石墨微晶,经水热及微波工艺制备石墨烯纳米片。采用透射电镜、扫描电镜、原子力显微镜、红外光谱、拉曼光谱及X射线衍射(X-ray diffraction spectroscopy,XRD)等技术对样品进行了形貌、结构和谱学等表征。原子力图表明,该石墨烯纳米片厚度范围为0.8~1.75 nm,为单层或双层石墨烯;由红外光谱可以观察到1 550 cm-1左右的石墨烯特征碳碳双键骨架振动峰。但未观察到传统Hummers氧化及水合肼法常出现,与石墨烯氧化后缺陷度有关的3 000~3 600 cm-1之间峰及1 250 cm-1左右振动峰。XRD数据显示所制备材料在24.7°亦具有石墨烯特征峰。拉曼光谱分析则显示,该方法所制备材料的与石墨烯层数相关的2D峰峰高接近G带的2倍,而与石墨烯缺陷度有关的D带峰峰高较小。该方法可成功制备单层或双层石墨烯纳米片,研究结果为高效制备基于稻谷壳可再生资源的石墨烯开辟了一条新路。 展开更多
关键词 废弃物 活性炭 工艺 稻谷壳 石墨烯
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文冠果果壳化学成分的分离与鉴定 被引量:5
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作者 万国盛 任宇豪 +3 位作者 高慧媛 白爽 袭荣刚 王晓波 《沈阳药科大学学报》 CAS CSCD 北大核心 2015年第1期18-21,共4页
目的对文冠果(Xanthoceras sorbifolium Bunge)果壳的化学成分进行研究,以期更好地开发利用文冠果果壳。方法采用制备薄层色谱、反复硅胶柱色谱、Sephadex LH-20柱色谱、开放ODS柱色谱和制备高效液相色谱等方法进行分离纯化,根据理化... 目的对文冠果(Xanthoceras sorbifolium Bunge)果壳的化学成分进行研究,以期更好地开发利用文冠果果壳。方法采用制备薄层色谱、反复硅胶柱色谱、Sephadex LH-20柱色谱、开放ODS柱色谱和制备高效液相色谱等方法进行分离纯化,根据理化性质和波谱数据分析对化合物进行结构鉴定。结果共分离得到8个化合物,分别鉴定为对苯二酚(hydroquinone,1)、对羟基苯乙腈(4-hydroxybenzylcyanide,2)、花椒毒素(xanthotoxin,3)、木犀草素(luteolin,4)、山柰酚(kaempferol,5)、柚皮素-7-O-β-D-葡萄糖苷(naringenin-7-O-β-D-glucopyranoside,6)、槲皮苷(quercitrin,7)、二氢红花菜豆酸-3'-O-β-D-葡萄糖苷(dihydrophaseicacid-3'-O-β-D-glucopyranoside,8)。结论化合物1~4、6、8为首次从文冠果属植物中分离得到。 展开更多
关键词 文冠果 果壳 化学成分 结构鉴定
阳离子改性茧衣的吸附性研究 预览
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作者 王蜀 刘祖兰 +2 位作者 蒋瑜春 孙礼 张袁松 《蚕学通讯》 2013年第1期19-22,共4页
为了拓展茧衣在过滤和废水处理领域的应用,对茧衣进行阳离子接枝改性,测试了改性茧衣对活性染料和细菌的吸附性及稳定性。通过染液Abs值和染液颜色的变化以及平板茵落数来判断改性茧衣对染料和细菌的吸附作用。结果表明:改性茧衣对... 为了拓展茧衣在过滤和废水处理领域的应用,对茧衣进行阳离子接枝改性,测试了改性茧衣对活性染料和细菌的吸附性及稳定性。通过染液Abs值和染液颜色的变化以及平板茵落数来判断改性茧衣对染料和细菌的吸附作用。结果表明:改性茧衣对活性染料和细菌的吸附效果明显,有较强抑茵效果;经高温高压处理后的改性茧衣对染料和细菌的吸附作用没有大的影响。该研究结果为茧衣在吸附材料、过滤材料、废水处理等方面的应用提供了有益的借鉴和参考。 展开更多
关键词 茧衣 阳离子改性 吸附 细菌
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5种籼稻品种谷壳中游离态和结合态酚类物质含量及其抗氧化活性比较 预览 被引量:30
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作者 李青 张名位 +6 位作者 张瑞芬 魏振承 邓媛元 唐小俊 张业辉 李武 马永轩 《中国农业科学》 CAS CSCD 北大核心 2012年第6期 1150-1158,共9页
【目的】比较不同水稻品种谷壳中游离态和结合态酚类物质的含量、组成及其抗氧化活性差异。【方法】选用5个代表性的南方籼稻品种,分析其谷壳中的游离态和结合态总酚、总黄酮含量,采用高效液相色谱法分析其单体酚类的组成及含量,采用铁... 【目的】比较不同水稻品种谷壳中游离态和结合态酚类物质的含量、组成及其抗氧化活性差异。【方法】选用5个代表性的南方籼稻品种,分析其谷壳中的游离态和结合态总酚、总黄酮含量,采用高效液相色谱法分析其单体酚类的组成及含量,采用铁离子还原能力(FRAP,Ferric reducing ability of plasma)和ABTS(2,2'-联氨-二-3-乙基-苯并噻唑-6-磺酸,2,2′-azino-bis-3-ethylbenzothiazoline-6-sulphonic acid)自由基清除能力两种方法评价其体外抗氧化能力差异。【结果】5个不同籼稻品种谷壳的游离酚、结合酚和总酚含量分别介于42.8—123.0、260.9—325.2和320.2—398.3 mg GAE/100 g DW,其结合态酚占总酚含量百分比平均为78.9%;游离态黄酮、结合态黄酮和总黄酮含量分别介于34.0—58.0、47.9—64.4和82.0—115.7 mg CE/100 g DW,其结合态黄酮占总黄酮含量的百分比平均为56.4%;稻壳中的酚类物质主要为没食子酸、原儿茶酸、绿原酸、香草酸、咖啡酸、丁香酸、香豆酸和阿魏酸,其中游离态酚类物质以丁香酸和香豆酸为主,平均含量分别为25.09μg.g-1DW和31.21μg.g-1DW;结合态酚类物质以香豆酸含量为主,平均含量为2141.61μg.g-1DW。稻壳游离态、结合态和两者合计FRAP抗氧化能力值分别介于37.7—106.0、217.9—281.0和269.3—370.3 mg TE/100 g DW,其结合态占总FRAP百分比平均为77.3%;稻壳游离态、结合态和两者合计ABTS抗氧化能力值分别介于26.3—85.8、67.2—111.9和93.4—155.2 mg TE/100 g DW,其结合态占总ABTS百分比平均为64.8%。【结论】稻壳中含有较丰富的酚类物质,具有较强的抗氧化活性。稻壳总酚、总黄酮含量、单体酚组成及其抗氧化活性均以结合态形式为主,且有显著的品种间差异。提示水稻谷壳可以作为一种潜在的天然抗氧化剂资源进行开发利用。 展开更多
关键词 水稻品种 谷壳 酚类物质 抗氧化活性
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谷壳制备的白炭黑研制Ce-MEL分子筛及其吸附性能的研究 被引量:2
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作者 南小英 成岳 +1 位作者 潘顺龙 李杰文 《中国陶瓷》 CAS CSCD 北大核心 2012年第2期 21-23,共3页
以谷壳制备的白炭黑为硅源、四丁基溴化铵(TBAOH)为模板剂,按0.05Na2O∶SiO2∶0.35TBAOH∶40H2O∶(0.001-0.1)Ce(NO)3.6H20的摩尔比,170℃下水热晶化48h合成了Ce-MEL分子筛,并采用XRD、SEM等手段对合成分子筛进行表征。吸附性能... 以谷壳制备的白炭黑为硅源、四丁基溴化铵(TBAOH)为模板剂,按0.05Na2O∶SiO2∶0.35TBAOH∶40H2O∶(0.001-0.1)Ce(NO)3.6H20的摩尔比,170℃下水热晶化48h合成了Ce-MEL分子筛,并采用XRD、SEM等手段对合成分子筛进行表征。吸附性能结果表明,Ce-MEL分子筛的投加量为2.5g/L、pH为7、振荡时间为2h时吸附效果较好,脱色率达到88.5%。 展开更多
关键词 谷壳 白炭黑 Ce-MEL 吸附 阳离子红X-5GN
由谷壳制备的二氧化硅合成MCM-49分子筛及性能研究 被引量:1
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作者 李燕孙 成岳 +3 位作者 苏晓渊 潘顺龙 冯茂华 江舟 《中国陶瓷》 CAS CSCD 北大核心 2010年第11期35-37,48共4页
利用谷壳制备的二氧化硅为硅源、六亚甲基亚胺(HMI)为模板剂,按SiO2∶0.5HMI∶0.033Al2O3∶0.36NaOH∶40H2O的摩尔比,采用静态水热合成法合成了具有MWW层状结构的MCM-49分子筛,并采用XRD、TEM等手段对合成分子筛进行了表征。研究了所... 利用谷壳制备的二氧化硅为硅源、六亚甲基亚胺(HMI)为模板剂,按SiO2∶0.5HMI∶0.033Al2O3∶0.36NaOH∶40H2O的摩尔比,采用静态水热合成法合成了具有MWW层状结构的MCM-49分子筛,并采用XRD、TEM等手段对合成分子筛进行了表征。研究了所合成的分子筛对阳离子红X-5GN的吸附性能,考察了分子筛的投加量、反应环境的pH值、吸附时间等因素对吸附阳离子红X-5GN模拟染料废水的影响。在MCM-49分子筛的投加量为1.4g/L,pH为10,振荡时间为60min的实验条件下,脱色率以及降解率分别达到了69%和70.1%,取得了良好的效果。 展开更多
关键词 谷壳 白炭黑 MCM-49 吸附 阳离子红X-5GN
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