Synergistic effects of three traditional herbs green tea,mulberry leaf and corn silk on glucose uptake level of L6 myoblasts and the hypoglycemic mechanism

Background:Green tea,mulberry leaf and corn silk are traditional herbs used in the prevention and treatment of diabetes in China for a long time,but their synergistic hypoglycemic effects and mechanisms remain unclear.Methods:The effective components of green tea,mulberry leaf and corn silk were extracted and enriched.Mixture design of experiments was used to study the influences of different combinations on the cell viability and glucose uptake level of L6 myoblasts,so as to determine the optimal synergistic hypoglycemic combination.The possible hypoglycemic mechanism of the optimal synergistic combination was explored by cytotoxicity assay,glucose uptake assay,and western blot.Results:Three polyphenol enrichment fractions of the herbs,30%ethanol elution fraction of green tea(GT),50%ethanol elution fraction of mulberry leaf(ML)and 60%ethanol elution fraction of corn silk(CS)were obtained.The antioxidant activities of GT-30%,ML-50%and CS-60%were superior to those of crude extracts,and showed strong potential inα-amylase andα-glucosidase inhibition activities.The optimal synergistic combination of crude extracts G7(crude extract of green tea:crude extract of mulberry leaf:crude extract of corn silk=1:5:3),polyphenol enrichment fractions R3(GT-30%:ML-50%:CS-60%=1:7:1)and monomers X2(epigallocatechin gallate:morusin:formononetin=3:1:2)were selected,respectively.G7,R3,and X2 showed promoting effects on the cell viability and glucose uptake of L6 myoblasts within the detected concentration range.In addition,G7,R3,and X2 could increase the expression levels of p-PI3K/PI3K and p-Akt/Akt in L6 myoblasts,and promote the translocation of Glut4,but G7 and R3 showed more significant effects.Conclusion:The synergistic hypoglycemic effects of green tea,mulberry leaf and corn silk had the characteristics of multiple-components and multiple-targets with p-PI3K/PI3K,p-Akt/Akt and the translocation of Glut4 signal pathways involved.The three traditional herbs might have the potential to be combined used for the prevention and treatment of diabetes based on the synergistic hypoglycemic effects.

Robust Waterborne Polyurethane/Wool Keratin/Silk Sericin Freeze-Drying Composite Membrane for Heavy Metal Ions Adsorption

Wool keratin(WK)and silk sericin(SS)have the ability to interact with metal ions.In order to take advantage of this potential,a novel environmentally friendly waterborne polyurethane(WPU)/WK/SS membrane named as WPU&WK&SS membrane with crosslinked structure was constructed by freeze-drying via self-assembly style.Surface morphology and chemical structure characterization were investigated by scanning electron microscopy(SEM)and Fourier transform infrared spectroscopy(FT-IR).In addition,the adsorption experiments of Cu2+and Cr6+were performed to evaluate the adsorption of WPU&WK&SS membrane,including adsorption kinetics,adsorption isotherm models and various factors affecting adsorption.Further investigation indicates that the maximum adsorption capacity of Cu2+and Cr6+can reach 54.21 mg·g-1and 85.21 mg·g-1,respectively,which are higher than most of the reported adsorbents.Through adsorption kinetics and thermodynamic analysis,it is find that the pseudo-second-order kinetic equation and the Langmuir adsorption isotherm model are more suitable for the static adsorption of Cu2+and Cr6+by WPU&WK&SS membrane.

THE EFFECTS OF PLASMA-INDUCED GRAFT COPOLYMERIZATION WITH ACRYLIC ACID ON THE STRUCTURE AND DYEING PROPERTIES OF MULBERRY SILK

The effects of plasma-induced graft copolymerization with acrylic acid (AAc) on the structure and dyeing properties of mulberry silk are investigated. Through the transmission infrared spectroscopy(IR) , attenuated total reflection infrared spectroscopy(ATR-IR) and X-ray photoelectron spectroscopy(XPS) studies, changes of the surface structure and composition are observed. The results show that plasma-induced graft copolymerization has a different meehanism from that of chemical graft copolymerization. The plasma graft copolymerization brings AAc branch polymers into the surface of silk through the initiation of some kinds of oxygen and nitrogen groups created by plasma. That is just the reason that the dyeing ability and color fastness of plasma-grafted silk for cationic dyestuff increase and its mechanical properties have not been changed significantly.

EFFECT OF ELASTOMER ON WRINKLE RECOVERY OF SILK AND SILK/WOOL BLEND FABRICS

An investigation is described in which various polyfunctional elastomers( cationic methylaminopolysiloxane,nonic concentrated glyoxal resin and anionicpolyurethane etc. ) were applied on silk,wool and silk/ wool blend fabrics forimprovement wrinkle recovery.A study on this paper describes wrinkle recovery oftreated fabrics by the thermobench method,and ascertains reason which elastomerimproves wrinkle recovery of silk and silk/ wool blend fabrics according as results ofthe DSC,the SEM and the acid or alkali resistance.

WRINKLE RECOVERY OF WOOL AND WOOL/SILK BLENDS

The wrinking properties of light-weight woven fabrics mabe from wool and a range ofwool/silk blends have been assessed using the“Thermobench”test method.The effects ofageing/annealing,and of interyarn and interfibre friction,have been compared for the vani-ous fabrics.The results of attemps to improve wrinkle recovery by chemical modification arepresented,and possible directions for future work are considered.

Production of Silk & Wool Blended Worsted Cloth

Wool & silk blended fancy suiting is desinged. Through trial-production with silk sliver and Australian wool top, the spinning technology is investigated, and the relationship of spinning technology, blending ratio and yam construction is discussed.

饲料与桑叶饲喂的家蚕蚕丝品质分析

为明确人工饲料饲喂和桑叶饲喂对家蚕蚕丝品质的影响,借助扫描电子显微镜、氨基酸分析仪、电感耦合等离子体发射光谱仪、傅里叶变换红外光谱仪、二维广角X射线衍射仪等,系统性地对2种饲喂方式获得的蚕丝的形态、组成、结构与性能进行分析。结果表明:与桑叶饲喂所获得的蚕丝相比,人工饲料饲喂所获得的蚕丝在外观、蛋白质组分方面无显著差异,而在元素含量、脯氨酸含量、二级结构、结晶度等方面存在差异;大量元素中,除Na和Si外,其余元素在人工饲料饲喂蚕丝中的含量均显著低于桑叶饲喂蚕丝,微量元素Al、Cr、B在人工饲料饲喂蚕丝中含量低于桑叶饲喂蚕丝,而Fe、Mn、Zn、Cu元素的含量反之;脯氨酸在人工饲料饲喂蚕丝中的含量显著高于桑叶饲喂蚕丝;饲料饲喂蚕丝中β转角结构含量大于桑叶饲喂蚕丝,而无规则卷曲结构含量相反,其结晶度也较桑叶饲喂蚕丝的降低5.1%;人工饲料饲喂蚕丝具有更高的平均断裂应变,而桑叶饲喂蚕丝具有更高的断裂强度,但二者差异并不显著;虽然桑叶饲喂蚕丝与人工饲料饲喂蚕丝在部分元素、氨基酸和二级结构上存在一定差异,但反映到蚕丝力学性能上其差异并不显著,说明家蚕蚕丝品质受饲喂方式的影响不显著,人工饲料饲喂具有替代桑叶饲喂家蚕的可能性。

绢丝/毛/棉色纺纱的组成调控与性能分析

绢丝质地柔软光滑、手感舒适,在服装与家居纺织品等领域中得到了广泛应用,是中国绢纺产业的重要产品之一;然而,目前绢丝织物生产仍存在高能耗、高排污问题,且产品竞争力不足。为此,采用低污染的色纺技术对绢丝进行精确配色,并引入羊绒、羊毛、棉等纤维组分,制备色泽独特且性能优异的色纺纱,以满足市场多样化的需求。通过调控纱线中纤维组成与配比,探究其对混纺色纱条干、机械性能及色牢度的影响规律。通过引入不同颜色与配比的各类纤维后,纤维间的优势互补提升了绢丝系列产品的机械性能、色牢度,完善了绢丝产品性能的不足,实现了绢丝系列产品的多样化,减少了绢纺业的生产能耗与排污。

铜氨溶液法定量分析蚕丝/羊毛混合物

为了准确测定蚕丝/羊毛混合物中纤维含量,选用铜氨溶液试剂定量分析蚕丝/羊毛混合物。选择试验温度、振荡频率、振荡时间为试验因素,羊毛含量测试值与实际值的绝对差值为试验指标,首先采用单因素试验法确定各试验因素的较优范围,然后在较优范围内选择各试验因素进行三水平正交试验,通过对试验数据的分析得到最优试验条件,最后使用最优试验条件测试纯羊毛织物,计算得到羊毛的修正系数。结果表明:铜氨溶液法定量分析蚕丝/羊毛混合物的最优试验条件为试验温度40℃、振荡频率150 r/min、振荡时间40 min;羊毛的修正系数(d值)为0.9989,该方法操作简便,结果准确,重复性好。

基于显微共焦拉曼光谱技术的桑蚕丝及其织物的鉴别与分析

利用显微共焦拉曼光谱技术对桑、柞蚕丝的纤维及其织物进行鉴别,分析桑蚕丝织物的种类、颜色对拉曼光谱检测法的影响。结果显示:同品种不同产地的蚕丝间拉曼光谱没有明显差异;桑蚕丝与柞蚕丝的主要区别是二者酰胺III带的主峰位置分别出现在1229 cm^(-1)和1240 cm^(-1),β-折叠构象的特征峰位置分别出现在1084cm^(-1)和1094cm^(-1),且柞蚕丝的拉曼光谱在905 cm^(-1)处有一独有特征峰,因此通过显微共焦拉曼光谱技术可以实现桑、柞蚕丝之间的有效鉴别;桑蚕丝织物种类不影响其拉曼测试结果,而桑蚕丝织物颜色是影响其拉曼测试结果的主要因素。

蚕丝/羊毛织物的儿茶素同色染色

采用儿茶素对蚕丝织物和羊毛织物进行同浴染色,探讨媒染剂种类、媒染剂用量、染料用量、染色温度和染色时间对两种织物染色同色性的影响。得到蚕丝织物和羊毛织物同色性媒染的最佳工艺为:明矾5 g/L,儿茶素6%(omf),pH=5.5,浴比1∶50,80℃同浴媒染30 min。采用该工艺染色的织物色牢度优良,蚕丝织物的抗紫外性能大大提高。

氯化钙/乙醇法定量分析桑蚕丝混纺产品的研究

采用氯化钙/乙醇法对桑蚕丝/羊毛、桑蚕丝/黏胶纤维二组分混纺产品进行定量分析,并与75%硫酸法和次氯酸钠法定量分析结果进行对比。结果表明:氯化钙/乙醇法对羊毛、黏胶纤维基本无损伤,羊毛、黏胶纤维的质量修正系数均为1.00;氯化钙/乙醇法定量分析较优条件为浴比1150、温度70℃、振荡时间30 min,该方法操作简便、省时高效;相较于75%硫酸法和次氯酸钠法,氯化钙/乙醇法定量分析结果偏离幅度更小、与标准值更接近、准确性更高;氯化钙/乙醇法所用试剂对人体和环境无毒害作用,是绿色环保试剂,符合当今绿色可持续发展理念。

桑蚕丝织物蒸汽脱胶工艺及其性能

针对桑蚕丝织物常规脱胶方法脱胶时效低且脱胶废液污染环境等问题,提出采用一种高效无污染的蒸汽处理方法对桑蚕丝双绉织物进行脱胶,通过对蒸汽脱胶工艺的温度和时间进行探究,并选择脱胶完全的两种蒸汽脱胶工艺与常规碳酸钠脱胶法处理得到的桑蚕丝织物性能对比分析。结果表明:在105℃和110℃条件下,织物脱胶率与脱胶时间呈线性正相关,在115、120、125℃条件下,织物脱胶率与脱胶时间呈对数函数关系;当蒸汽温度为125℃,脱胶处理45 min的蒸汽脱胶工艺得到的织物力学性能最优,悬垂性能略差,其微观形貌和二级结构均未受到明显影响,且脱胶总时长缩短了45.83%。该蒸汽脱胶工艺对桑蚕丝双绉织物的脱胶具有可行性和可控性,并提高了脱胶效率,同时可为代替传统脱胶工艺提供理论参考。

丝毛混纺织物一浴法同色染色工艺

为实现丝毛混纺织物的一浴法同色染色,通过对毛纱和蚕丝的分浴及同浴染色实验,分析了温度对两种纱线染料上染情况的影响,发现在染色温度为85℃时,两种纱线同浴染色的同色性可以达到较好的水平。在此染色温度下,研究了一浴法常规染色工艺中pH值、元明粉质量浓度和保温时间对混纺织物同色性和染料上染率的影响。探索出可进一步提高织物同色性的一浴法低温延长染色工艺,并通过正交试验进行了工艺优化。最佳工艺参数为:染浴pH=5、酸性染料B 4%(o.w.f.)、匀染剂S 0.5 g/L、渗透剂F 0.5 g/L、元明粉50 g/L、40℃保温40 min、85℃保温20 min。

紫蓝草对桑蚕丝的染色性能

采用水浴提取的紫蓝草色素对桑蚕丝织物进行染色。阐述了桑蚕丝织物采用紫蓝草色素染色的前处理和染色过程,分析染色温度、染色时间和染浴pH值对桑蚕丝织物染色效果的影响。通过K/S值的对比,寻找最佳染色条件,并探究紫蓝草色素染色的桑蚕丝织物的耐水洗色牢度和耐日晒色牢度。试验结果表明,紫蓝草色素对桑蚕丝织物染色的最佳工艺为:明矾前媒染工艺,明矾质量浓度10 g/L,浴比1∶100,染液pH值10.0,染色温度30℃,染色时间30min。

抗紫外剂改性石榴皮色素及其功能性染色

为提高蚕丝织物的功能性和附加值,文章采用抗紫外剂改性天然染料石榴皮色素染色蚕丝织物。通过单因素实验确定改性反应最佳pH值,探讨了改性反应的机理,研究了染浴pH值对织物染色性能及抗紫外性能的影响。结果表明,染浴pH值分别为3.0、4.0、5.0、6.0时,相同pH值染浴中,改性后石榴皮色素染色织物的K/S值高于改性前。染浴pH值分别为3.0、4.0、5.0、6.0、7.0时,改性后石榴皮色素染色织物的抗紫外性能显著提高,相同pH值染浴中UPF比值在1.87~2.57。染浴pH值为3.0时,改性前、后石榴皮色素染色织物的K/S值均较高,耐皂洗色牢度及耐摩擦色牢度达4~5级,UPF值分别为24.54和10.73。

微波辐照后的真丝纤维结构及其性能研究

利用微波辐照对真丝纤维的热效应和非热效应作用 ,对不同的丝纤维———桑蚕丝、柞蚕丝进行了改性研究 ,探索其结构与性能的变化规律 。

脂肪酶在纺织工业中的应用

从脂肪酶的特点及其应用范围出发,对目前脂肪酶在纺织工业中的应用研究进行了综述。主要介绍了脂肪酶在羊毛纤维毡缩性的改善、丝绸纤维上的油脂和蜡质的去除、棉纤维的脱浆以及涤纶纤维性能的改善等方面的作用及研究进展。探讨了脂肪酶在纺织工业应用研究中存在的几个问题,并对其在纺织工业中的进一步应用做了展望。

烘煮茧工艺及雌雄性别对茧丝质的影响

蚕品种茧丝纤度、伸长率性状具有相对的稳定性,改变烘煮茧工艺条件对其性能影响不显著,雄蚕茧纤度明显比雌蚕茧细;降低等速干燥温度有利于提高茧丝强力;延长减速干燥时间可显著提高出丝率,雄蚕茧的出丝率显著高于雌蚕茧。

木薯蚕丝结构与性能表征

为研究木薯蚕丝的结构和性能,采用扫描电镜、红外光谱、X射线衍射、力学性能等仪器与测试方法对桑蚕丝、柞蚕丝及木薯蚕丝的结构和性能进行对比研究。结果表明:木薯蚕丝的形貌结构与柞蚕丝相似,木薯蚕丝表面有纵向的条纹及块状或颗粒状的结晶物,横截面面积较大且扁平,而桑蚕丝表面光滑,横截面较圆整;木薯蚕丝与柞蚕丝中存在Ala-Ala-Ala结构,而桑蚕丝不存在,可利用特征吸收峰区分不同品种蚕丝;木薯蚕丝既有α-螺旋结构,又有β-折叠结构,并以β-折叠结构为主,显示出了高度的结晶β-折叠结构;桑蚕丝、柞蚕丝、木薯蚕丝的线密度分别为3.13、6.13、4.18 dtex;木薯蚕丝的断裂强度、断裂伸长率均高于桑蚕丝,与柞蚕丝接近,具有优异的力学性能。