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1.
用吸附法固定化培养紫草细胞   总被引:4,自引:0,他引:4  
采用生物活性载体 ,通过吸附固定化方式 ,结合液体石蜡原位萃取技术 ,培养紫草细胞。测定了细胞生长、底物消耗和产物合成的动力学 ,紫草宁产率为 0 .916 g/g干重细胞和 0 .95 3g/g干重接种细胞 ,分别为悬浮培养的 12 .7倍和 6 .3倍。同时 ,对吸附与包埋固定化方法进行了综合比较 ,探讨了吸附固定化方法的应用前景。  相似文献   

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利用大孔吸附树脂提取蜀葵花色素的研究   总被引:15,自引:0,他引:15  
研究利用大孔树脂吸附和分离蜀葵(Althaearosea(L.)Cavan)花红色素,比较了D-072、D-401、D-301-G、D-101、NKA-9、D-290、D-110七种树脂对该色素的静态吸附情况以及不同极性解吸剂对吸附色素的树脂洗脱的效果,从中选择出吸附和解吸效果最佳的树脂以及较适的解吸剂。结果表明:用D-401大孔吸附树脂作吸附剂,色素吸附率达91%;解吸剂用含0.1%HCl的60%酸化乙醇,色素可被充分洗脱下来,解吸效果较好;树脂通过回收再生后可重复利用。大孔吸附树脂法精制蜀葵花色素工艺相对简单,原料、试剂利用率较高。  相似文献   

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通过静态吸附解析实验,确定了利用大孔吸附树脂初步纯化唐古特白刺红色素的条件,并根据所得条件做了扩大实验。结果表明.X-5树脂的吸附能力最好,吸附率为76.85%,pH在1—3范围内对吸附效果无影响;较高的乙醇浓度和pH值有利于色素的解析,解析液以80%酸化乙醇(含1%HCI)效果最佳,解析时间为40min;扩大实验得到紫红色色素粉末,得率为1.24%,水溶性好,不含糖类、蛋白质等水溶性杂质;树脂通过回收再生可重复利用。本实验为色素产品的开发及白刺果实的综合利用提供了理论依据。  相似文献   

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羽粉水解液用颗粒活性炭层析脱色吸附氨基酸的研究   总被引:1,自引:0,他引:1  
本文分析测定了羽粉水解液在颗粒活性炭柱上层析脱色时柱前柱后液中的氨基酸含量。结果表明,颗粒活性炭在层析吸附羽粉水解液色素时对各种氨基酸都有不同程序的吸附,吸附的平均量为26.50%,尤其是对芳香族氨基酸,吸附量几乎为100%。  相似文献   

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X—5树脂吸附和分离萝卜红色素   总被引:15,自引:0,他引:15  
研究报道了X-5树脂吸附和分离萝卜红色素的方法。试验结果表明:在pH3.0-5.0时,树脂X-5时萝卜红色素具有较强的吸附能力和吸附选择性,其吸附容量为82.6mg/g树脂,吸附平衡时间30min,X-5树脂对产生萝卜异味的萝卜苷几乎不吸附,同时用50%的乙醇溶液洗脱,可获得90.8%以上的萝卜红色素。用该工艺生产的色素产品为深红色粉状,色价比国家标准提高了13倍。  相似文献   

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桑椹红色素纯化的动态吸附条件研究   总被引:12,自引:3,他引:9  
桑椹红色素是一种安伞、无毒的食用天然色素。本实验埘8种大孔吸附树脂进行筛选,然后通过单因素试验、正交试验和方差分析确定了吸附桑椹红色素的最佳操作条件。结果表明,LSA-21树脂对桑椹红色素的吸附和解吸性能较好;确定的最佳吸附条件为:料液浓度(以吸光度计)为0.425Abs,上柱速度3.5BV/h,料液pH1.57。  相似文献   

7.
研究了小球藻对Cd^2 的吸附动力学。研究表明,小球藻对Cd^2 有一定的吸附作用,在吸附的起始阶段,吸附速率较快,且随温度的升高吸附速率增大,吸附过程在20min内达到平衡。结果还表明,该吸附是简单的一级反应,并由此建立了吸附反应的速率方程,推算出吸附反应的活化能Ea=31.42kl/mol。  相似文献   

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通过考察真菌诱导子与吸附树脂对新疆紫草毛状根中萘醌积累的影响,获得真菌诱导子与吸附树脂对萘醌类物质积累的最佳处理,为规模化生产提供依据.以新疆紫草毛状根为试验材料,将黑曲霉、米曲霉诱导子及其混合诱导子、大孔吸附树脂添加到M-9培养基中,采用分光光度法测定毛状根总萘醌含量.试验结果表明:在毛状根培养10d时以2.5∶50的比例添加混合诱导子,总萘醌含量是对照的2.28倍;在此结果基础上,在培养第0天添加大孔吸附树脂NKA-9,总萘醌含量最高是对照的3.71倍;黑曲霉诱导子与米曲霉诱导子有协同效应;在生物反应器中添加混合诱导子及大孔吸附树脂NKA-9,其总萘醌含量是对照的4.17倍.米曲霉诱导子、混合诱导子对毛状根增殖有促进作用;同时添加大孔吸附树脂NKA-9及混合诱导子能提高毛状根总萘醌含量.生物反应器培养毛状根为今后利用新疆紫草毛状根规模化生产总萘醌提供了理论参考.  相似文献   

9.
紫色土中砷、磷的吸附-解吸和竞争吸附   总被引:6,自引:0,他引:6  
邹强  刘芳  杨剑虹 《应用生态学报》2009,20(6):1383-1389
采用批培养法研究了As、P在三峡库区典型土壤紫色土中的吸附-解吸特点及竞争吸附对As、P迁移活化的影响.结果表明:3种紫色土中As、P的吸附-解吸特点相似,等温吸附均符合Langmuir和Freundlich方程,As在酸性、中性和石灰性紫色土中的最大吸附量分别为1428.6、1250.0和1111.1 mg·kg-1;P在酸性、中性和石灰性紫色土中的最大吸附量分别为322.6、357.1和434.8 mg·kg-1;As、P吸附动力学过程为先快后慢,均符合一级动力学方程与Elovich方程,快速吸附段符合一级动力学方程,为交换吸附;慢速吸附阶段满足Elovich方程,可能属于深层吸附或专性吸附.As、P竞争吸附试验表明,As、P共存时P的吸附速度和吸附量均增强,而As的吸附速度和吸附量均降低,表明As的存在能明显增强紫色土对P的吸附作用,P的存在则明显抑制紫色土对As的吸附.  相似文献   

10.
大孔吸附树脂对乳清分离蛋白酶解物的吸附特性研究   总被引:2,自引:0,他引:2  
研究了大孔吸附树脂对乳清分离蛋白(WPI)酶解液的吸附特性。比较了6种大孔吸附树脂对WPI酶解物的静态吸附率与解吸附率。结果表明,DA201-C大孔吸附树脂最适合WPI酶解物的分离,其对WPI酶解液的动态吸附条件为:上样液浓度:10mg/mL;洗脱剂:75%乙醇溶液;洗脱剂流速:1BV/h。  相似文献   

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Comprises species occurring mostly in subtidal habitats in tropical, subtropical and warm-temperate areas of the world. An analysis of the type species, V. spiralis (Sonder) Lamouroux ex J. Agardh, a species from Australia, establishes basic characters for distinguishing species in the genus. These characters are (1) branching patterns of thalli, (2) flat blades that may be spiralled on their axis, (3) width of the blade, (4) primary or secondary derivation of sterile and fertile branchlets and (5) position of sterile and fertile branchlets on the thalli. Application of the latter two characters provides an important basic method for separation of species into three major groups. Osmundaria , a genus known only in southern Australia, was studied in relation to Vidalia , and its separation from the Vidalia assemblage is not accepted. Species of Vidalia therefore are transferred to the older genus name, Osmundaria. Two new species, Osmundaria papenfussii and Osmundaria oliveae are described from Natal. Confusion in the usage of the epithet, Vidalia fimbriala Brown ex Turner has been clarified, and Vidalia gregaria Falkenberg, described as an epiphyte on Osmundaria pro/ifera Lamouroux, is revealed to be young branches of the host, Osmundaria prolifera.  相似文献   

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Fifteen chromosome counts of six Artemisia taxa and one species of each of the genera Brachanthemum, Hippolytia, Kaschgaria, Lepidolopsis and Turaniphytum are reported from Kazakhstan. Three of them are new reports, two are not consistent with previous counts and the remainder are confirmations of very scarce (one to four) earlier records. All the populations studied have the same basic chromosome number, x = 9, with ploidy levels ranging from 2x to 6x. Some correlations between ploidy level, morphological characters and distribution are noted.  相似文献   

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Curcumin is the yellow pigment of turmeric that interacts irreversibly forming an adduct with thioredoxin reductase (TrxR), an enzyme responsible for redox control of cell and defence against oxidative stress. Docking at both the active sites of TrxR was performed to compare the potency of three naturally occurring curcuminoids, namely curcumin, demethoxy curcumin and bis-demethoxy curcumin. Results show that active sites of TrxR occur at the junction of E and F chains. Volume and area of both cavities is predicted. It has been concluded by distance mapping of the most active conformations that Se atom of catalytic residue SeCYS498, is at a distance of 3.56 from C13 of demethoxy curcumin at the E chain active site, whereas C13 carbon atom forms adduct with Se atom of SeCys 498. We report that at least one methoxy group in curcuminoids is necessary for interation with catalytic residues of thioredoxin. Pharmacophore of both active sites of the TrxR receptor for curcumin and demethoxy curcumin molecules has been drawn and proposed for design and synthesis of most probable potent antiproliferative synthetic drugs.  相似文献   

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正Dear Editor,In December 2019, a novel human coronavirus caused an epidemic of severe pneumonia(Coronavirus Disease 2019,COVID-19) in Wuhan, Hubei, China(Wu et al. 2020; Zhu et al. 2020). So far, this virus has spread to all areas of China and even to other countries. The epidemic has caused 67,102 confirmed infections with 1526 fatal cases  相似文献   

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