从人发中提取胱氨酸的比色分析测定方法

从人发中提取的胱氨酸，需要对其含量进行测定。本文提出了用比色分析测定胱氨酸的含量，此法与国家标准ＧＢ１２９６－７７方法进行比较，其变异系数为１．０３－１．１７％，可以用于胱氨酸生产的控制分析中。     

新试剂4－（5－硝基－2－吡啶偶氮）－间苯二酚分光光度法测定人发中的微量锌

用新试剂４－（５－硝基－２－吡啶偶氮）－间苯二酚（５－ＮＯ２－ＰＡＲ）分光光度法测定了人发中微量锌。络合物的表观摩尔吸光系数为１．１９×１０５Ｌ·ｍｏｌ－１·ｃｍ－１。络合比为Ｚｎ２＋：５－ＮＯ２－ＰＡＲ＝１：２。标准加入的回收率在９６％～１０５％之间。方法用于人发中锌含量的测定，结果令人满意。     

从毛发水解制取胱氨酸后母液中提取L－精氨酸的研究

本文研究了从毛发水解制取胱氨酸后母液中提取Ｌ－精氨酸的方法，产品质量稳定，收率较高。为工业生产提供了依据。     

从毛发水解制取胱氨酸后母液中提取L—精氨酸的研究

本文研究了从毛发水解制以胱氨酸后母液中提取Ｌ－精氨酸的方法，产品质量稳定，收率较高，为工业生产提供了依据。     

Cu(Ⅱ)对DApEM-V(Ⅴ)-H_3PO_4-Mn(Ⅱ)-OP阻抑作用的研究

在酸性介质中Ｃｕ（Ⅱ）能阻抑试剂ＤＡｐＥＭ与Ｖ（Ⅴ）的显色反应。研究了该反应的动力学参数,表观速度常数２．９１×１０－３ｓ－１,表观活化能为５２．８４ｋＪ·ｍｏｌ－１。从而建立了一种测微量Ｃｕ（Ⅱ）的动力学光度法。Ｃｕ（Ⅱ）含量在１．０～８．０μｇ·２５ｍＬ－１范围内,与ｌｇＡ０Ａ呈良好线性,表观摩尔吸光系数为１．１７×１０５Ｌ·ｍｏｌ－１·ｃｍ－１,检出限１．３４×１０－１０ｇ·Ｌ－１,该方法用于人发样品中Ｃｕ的测定,ＲＳＤ％为０．４３％～０．４５％,回收率为９６％～９９％。     

Mo（Ⅵ）与Tiron的显色反应及应用研究

研究了Ｍｏ（Ⅵ）与Ｔｉｒｏｎ的反应，发现在ｐＨ４．０的ＨＡｃ－ＮａＡｃ介质中形成１：１配合物，该配合物在２５２ｎｍ、３１５ｎｍ有两个吸收峰，而在可见光区无吸收峰。测得ε２５２＝６．９×１０￣３Ｌ·ｍｏｌ－１·Ｃｍ－１，ε３１５＝３．５×１０３Ｌ·ｍｏｌ－１·Ｃｍ－１。据此建立了测定Ｍｏ（Ⅵ）的方法，在２５２ｎｍ和３１５ｎｍ处的线性范围分别为１．６×１０－６ｍｏｌ·Ｌ－１～２．Ｏ×１０－４ｍｏｌ·Ｌ－１和３．２×１０－４ｍｏｌ·Ｌ－１～２．０×１０－４ｍｏｌ·Ｌ－１。检出限分别为８．Ｏ×１０－７ｍｏｌ·Ｌ－１和１．６×１０－６ｍｏｌ·Ｌ－１．ＰＯ＿４￣３＋、ＳｉＯ＿３￣２－对测定无干扰，而Ｗ（Ⅵ）、Ｖ（Ⅴ）、Ｆｅ（Ⅲ）等有干扰。该法试用于有机磷合钼聚多酸盐样品的测定，结果满意，方法回收率９６％～１０２％，变异系数≤１．ｌ％（ｎ＝１２）。     

从人发中提取胱氨酸的比色分析测定方法

从人发中提取的胱氨酸，需要对其含量进行测定。本文提出用比色分析测定胱氨酸的含量。此法与国家标准ＧＢ１２９６—７７方法进行比较，其变异系数为１０３～１１７％。可以用于胱氨酸生产的控制分析中。     

L—半胱氨酸的电化学还原制备（Ⅰ）

研究了包括电极材料，电解方式和电流在内的几个因素对Ｌ－胱氨酸电化学还原为Ｌ－半胱氨酸的影响。结果表明，经处理后的Ｓｎ能明显地提高反应速率；恒电位电解可使Ｌ－半胱氨酸的产率和电流效率分别达到９８％和１００％；恒电流电解的适宜电流密度为１２－１６Ａ；ｄｍ＾２，产率和电流效率各为９７．６－９８．５％和７０－７８％；分段控制电流法的产率为９６．４％，电流效率为９２％。     

硫代硫酸盐法添加氯化钠和十二烷基磺酸钠浸取金矿

对湖北氧化铁型金矿进行了Ｎａ２Ｓ２Ｏ３法添加ＮａＣｌ而不加Ｃｕ２＋的浸取条件优化研究,当［Ｓ２Ｏ２－３］＝０．８ｍｏｌ／Ｌ、［ＮＨ３］＝１～２ｍｏｌ／Ｌ、［ＮａＣｌ］＝１．０ｍｏｌ／Ｌ、浸取温度５０℃、浸取时间为３ｈ时,浸出率达到９８％．对广东河台、山东招远硫化金矿进行了浸取研究,当［Ｓ２Ｏ３２－］＝０．８ｍｏｌ／Ｌ、［ＮＨ３］＝２ｍｏｌ／Ｌ、［ＮａＣｌ］＝１．０ｍｏｌ／Ｌ、十二烷基磺酸钠１１．０ｍｏｌ／Ｌ、浸取温度５０℃、浸取时间３ｈ时,浸取率分别达到９６％和９３％．     

示波极谱法同时测定日用瓷中的微量溶出铅,镉

在４％ 的醋酸体系,碘化钾—磺基水扬酸—抗坏血酸底液中,Ｐｂ２＋ 、Ｃｄ２＋ 与Ｉ－ 形成络离子,在滴汞电极上形成灵敏度很高的吸附催化波,Ｐｂ２＋ 、Ｃｄ２＋ 的峰电位分别为－ ０．５４Ｖ和－ ０．７０Ｖ,应用二阶导数测峰电流表明,线性良好,Ｐｂ２＋ 、Ｃｄ２＋ 的检出限分别为７．０μｇ·Ｌ－１ 、５．７μｇ·Ｌ－１ ,方法的相对标准偏差为１．６４％ 、６．０４ ％ 。实验表明该方法可以满足日用陶瓷中的溶出铅、镉的测定要求,方法令人满意。     

Efficient production of l-lactic acid from chicken feather protein hydrolysate and sugar beet molasses by the newly isolated Rhizopus oryzae TS-61

The aim of this study was to investigate production of l-lactic acid from molasses and chicken feather protein hydrolysate (CFP) by the newly isolated Rhizopus oryzae TS-61. R. oryzae TS-61 was capable of utilizing molasses sucrose and CFP as carbon and nitrogen sources, respectively. In contrast to yeast extract and ammonium sulfate, CFP had potential not only to prevent excessive pH changes and foaming but also to provide smaller uniform pellet formation in during fermentation. Thanks to these properties, it was concluded that CFP might have resulted in higher l-lactic acid production than the other two nitrogen sources (yeast extract and ammonium sulfate). At the end of 42-h optimal cultivation period, the highest (38.5 g/L) and lowest (28.8 g/L) concentrations of l-lactic acid were obtained with CFP and ammonium sulfate, respectively. This is the first report on use of waste chicken feather as a lactic acid production substrate. In addition, a new R. oryzae strain, being capable of using molasses sucrose as carbon source in order to produce l-lactic acid, was isolated.     

Compatibilities and properties of poly lactide/poly (methyl acrylate) grafted chicken feather composite: Effects of graft chain length

Surface modified poly(methyl acrylate) (PMA) grafted chicken feather fiber was applied as a reinforcement for polylactide (PLA)-based composite film. The PMA grafted feather fiber with different PMA lengths were obtained for surface initiated Cu(0)-mediated reversible-deactivation radical polymerization. PLA-based composite films with different unmodified or PMA-grafted chicken feather fiber loading were prepared by solvent casting. Grafting PMA onto feather fiber enhanced interfacial bonding. Cracks and voids between matrix and fiber were eliminated. Thermal stability of these films also improved after introducing PMA. Feather fiber with high graft ratio showed worse dispersity in PLA due to its self-aggregation. The heterogeneous nucleation agent behavior of feather grafted with longer PMA was also suppressed. Tensile tests showed that after modification, tensile strength and modulus was able to increase twice at 20% fiber loading. However, increasing PMA length improved break elongation but strength and modulus would drop slightly. These results indicated that grafting short PMA chain onto feather fiber surface was an effective and optimized method to improve dispersity and mechanical properties especially for higher filler loading.     

Self‐driven graft polymerization of vinyl monomers on poultry chicken feathers in the absence of initiator/catalyst

An efficient and simple method for graft copolymerization of powdered chicken feather (CF) with vinyl monomers without any free radical initiator is reported. Various vinyl monomers such as glycidyl methacrylate (GMA), styrene (S), and methyl methacrylate (MMA); (20–60 wt % with respect to CF) were successfully grafted to chicken feather (CF) by using sodium dodecyl sulfate (SDS, 0.086–0.5 mmol) in the absence of any catalyst or initiator. Most likely, the hydrophilicity, hydrophobicity, and complex forming properties of chicken feather keratin with surfactant molecules were responsible for efficient grafting of polymers on CF surface. The effect of polymerization conditions, such as monomer concentration, temperature, and time of reaction, on the grafting parameters such as monomer conversion, grafting efficiency, and molar grafting ratio were studied. The described method showed a good potential of using low cost, easily accessible poultry chicken feathers as grafting material and self catalyzing agent for graft copolymerization with vinyl monomers to produce low cost commodity plastic for various end uses. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134, 44645.     

利用文蛤壳制备复合氨基酸螯合钙

初步研究利用文蛤壳酸解制得钙盐,与鸡羽毛酶解成的复合氨基酸结合制备复合氨基酸螯合钙的工艺。重点探讨文蛤壳酸解酸的选择及温度的确定,鸡羽毛的酶解工艺和复合氨基酸螯合钙的螯合条件。结果表明：文蛤壳利用盐酸的效果比较好,酸解温度为110℃;鸡羽毛的最佳酶解条件为：8％木瓜酶,固液比为1：22,pH值9．5,酶解时间16小时;氨基酸钙螯合反应的最佳条件为：反应温度50℃。反应时间30rain,pH=5．0,氨基酸与钙盐的配体摩尔比为3：1。本研究废物被充分利用,工艺简单可行。     

鸡毛角蛋白的制备及其护发性能

采用还原C法提取了鸡毛角蛋白,考察了反应时间和温度对角蛋白产率和黏度影响。采用傅里叶变换红外光谱仪对提取物进行了表征。利用透析得到的角蛋白对头发进行处理,考察了其保湿及抗紫外线的效果。结果表明:当温度70℃、时间4 h时能够制得产率和黏度均较为理想的角蛋白溶液。红外谱图表明提取物为β-折叠结构的角蛋白。经角蛋白处理后的头发具有较好的保湿性,紫外谱图表明浓度6.7 g/L的羽毛角蛋白溶液对波长200～350 nm的紫外线有较好的吸收作用。     

Utilizing discarded plastic bags as matrix material for composites reinforced with chicken feathers

High‐ density polyethylene (HDPE) in used plastic bags was reinforced with chicken feathers to develop composites in an effort to add value and reduce the amount of the plastics and feathers disposed in landfills. Feathers are biodegradable, derived from renewable resource, and are inexpensive and HDPE in plastic bags is mostly discarded in landfills. Utilizing feathers as reinforcement for HDPE composites will provide an opportunity to develop environmentally friendly composites. In this research, HDPE plastic bags were reinforced with chicken feathers and the flexural, tensile and acoustic properties were studied. It was found that incorporating feathers substantially improved the flexural properties and tensile modulus. At the optimum condition, the HDPE‐feather (50/50) composites had flexural strength of 13.9 MPa and stiffness of 0.45 N/mm compared to 9.8 MPa and 0.29 N/mm for 100% HDPE. The 50/50 HDPE‐feather composite had similar tensile strength but more than twice the tensile modulus of neat HDPE. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013     

Effect of chicken‐feather protein‐based flame retardant on flame retarding performance of cotton fabric

A new kind of eco‐friendly chicken‐feather protein‐based phosphorus–nitrogen‐containing flame retardant was synthesized successfully with chicken‐feather protein, melamine, sodium pyrophosphate, and glyoxal. And its structure was characterized by Fourier transform infrared spectroscopy, and the thermogravimetry of the agent was analyzed. Then the flame retarding performances of the chicken‐feather protein‐based flame retardant and in combination with the borax and boric acid in application to a woven cotton fabric were investigated by the vertical flammability test and limited oxygen index test. In addition, the surface morphologies of the treated and untreated fabrics were conducted by the scanning electron micrographs (SEM), and the thermogravimetric analyses of the treated and untreated cotton were explored, and the surface morphologies of char areas of the treated and untreated fabrics after burnt were tested by the SEM. The results showed that the flame retardancy of the cotton fabric treated by the chicken‐feather protein‐based flame retardant in combination with borax and boric acid was improved further, and the combination of the chicken‐feather protein‐based flame retardant and borax and boric acid could facilitate to form a homogenous and compact intumescing char layer, and the combination of them plays a good synergistic effect in the improvement of the flame retardancy of the treated cotton fabric. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131, 40584.     

Light‐weight polypropylene composites reinforced with whole chicken feathers

Light‐weight composites reinforced with whole chicken feathers have better flexural strength than composites reinforced with feather fibers (barbs) and nearly thrice higher tensile strength and seven times higher tensile modulus than composites reinforced with powdered chicken feather quill. Chicken feathers are not only inexpensive and abundantly available but also have unique properties such as low density and hollow centers that make them preferable as reinforcement materials, especially for light‐weight composites. However, the traditional methods of developing composites do not provide the flexibility of using feathers in their native form as reinforcement. So far, the components in feathers such as barbs or quills have been used separately and/or feathers have been mechanically processed to destroy their native form in order to use feathers as reinforcement in composites. A new method of making composites using nonwoven webs as matrix allows the incorporation of reinforcing materials in their native form such as whole chicken feathers to develop composites. This research shows that whole chicken feathers can be used as reinforcement in composites with better flexural, tensile, and acoustic properties than composites made from processed chicken feathers. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010     

Comparative study of the structure and properties of wool treated by a chicken‐feather keratin agent,plasma, and their combination

Wool was treated by a chicken‐feather keratin agent, plasma, and their combination. These treated wools were characterized with Fourier transform infrared spectroscopy and scanning electron microscopy. The performance properties, such as the antifelting performance, wettability, and dyeability, of these treated fibers were tested. The results show that the antifelting performance, wettability, and dyeability of the wool modified by plasma combined with the chicken‐feather keratin were improved. This joint treatment technology is an environmentally friendly green ecological finishing technique. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2011     

Graft modification of methyl acrylate onto chicken feather via surface initiated Cu(0)-mediated reversible-deactivation radical polymerization

In this study, chicken feather was functionalized with 2-Bromoisobutyryl bromide (BIBB) where methyl acrylate (MA) was grafted through Cu(0)-mediated reversible-deactivation radical polymerization (RDRP) catalyzed by copper wire. Feather-g-PMAs with three different target degrees of polymerization (Dp) were prepared fast. Besides, molecular mass of PMA was closely associated with the theoretical value; PMA also exhibited relatively low polydispersity (~1.17). The catalyst was removed through simple washing, and thus a colorless product was yielded. However, Cu(0)-mediated RDRP in the presence of the unmodified chicken feather caused the loss of control. Feather-g-PMA with a short graft chain exhibited a uniform interface coated on the feather fiber. Because the grafted PMA and the feather substrate had a strong interaction, and the graft ratio was less, there was only one stage of decomposition, and no glass transition temperature was detected. We detected a rough surface on feather-g-PMA with a longer graft chain and observed the glass transition of PMA and obviously two stages of decomposition. After densely graft, the hydrophilicity of chicken feather decreased. These feather-g-PMAs exhibited better compatibility in organic solvents (e.g., acetone and toluene). © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136, 48246.