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Effects of different processing methods on the quality of Polygonatum cyrtonema Hua

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TMR Modern Herbal Medicine 2024年第2期7卷 28-34页

作者： Xin-Ning Zhang Shuang-Hui Shi Jun-Li Zhang Fan-Miao Kong Hai-Ting Zhu Si-Yuan Ma Yu-Feng Hu Ming-Rui Jiang Hui-nan Wang Meng-Lin Wang Xiao-Tong Wei Jing-qiu Zhang nan Sun Meng-Yu Chen Qian-Qian Liu Ying-Zi Wang School of Chinese Materia Medica Beijing University of Chinese MedicineBeijing 102488China

Background:In this study,we explored the effects of different processing methods on the quality of Polygonatum cyrtonema Hua(PC),and the role of Huangjiu in the processing ***:The sensory characteristics of the crude product,steamed product,and wine-processed product of PC were *** colorimeter was used to analyze the chromatic values of three different processed products on *** the same time,the contents of the water extract and alcohol extract were measured *** content of three different processing Polygonatum Polysaccharide(PCP)was determined using 0.2%anthrone-sulfuric *** correlation difference between the chromatic values and chemical composition of different PC products was analyzed using various analytical ***:The surface colors gradually deepened,the sweetness increased,the viscosity strengthened,and the tongue-numbing sensation disappeared after PC *** contents of extract and L^(*) gradually decreased from the crude to the steamed to the wine-processed product,consistent with the pattern of surface color ***,E^(*)ab gradually *** content of PCP was crude product>wine-processed product>steamed *** results of multivariate statistical analysis showed that the samples processed for crude,steamed,and wine-processed product were clustered into three *** correlation analysis showed that L^(*)and E^(*)ab were highly significant positively correlated with the content of PCP,and a*was significantly negatively correlated with the content of ***:The results showed that the wine-processed product had the best *** internal quality of the PC was correlated with its characteristics and chromatic *** this study,we investigated the internal and external quality of three different products of PC in order to provide a reference for further research on the impact of different processing methods on PC quality,the standardization of PC processing,and the

关键词： Polygonatum cyrtonema Hua different products chemical composition chromatic value characteristics

猫爪草活性多糖RTP-60-3V-Ⅲ化学结构及抗药物性肝损伤的作用

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中国新药杂志 2024年第4期33卷 360-371页

作者：姚蕙麻浩骆芙瑶顾嘉楠赵修南高月求单俊杰军事医学研究院毒物药物研究所北京100850 上海中医药大学曙光医院肝病科上海201203

目的:分离和纯化制备猫爪草的多糖成分RTP-60-3V-Ⅲ,研究其理化性质及化学结构特征,评价其对药物诱导肝细胞损伤的影响。方法:猫爪草粗多糖RTP-60经乙醇分级沉淀,DEAE纤维素、凝胶Sephdex G50和G-100柱色谱分离和纯化,获得分子量均一多... 详细信息

目的:分离和纯化制备猫爪草的多糖成分RTP-60-3V-Ⅲ,研究其理化性质及化学结构特征,评价其对药物诱导肝细胞损伤的影响。方法:猫爪草粗多糖RTP-60经乙醇分级沉淀,DEAE纤维素、凝胶Sephdex G50和G-100柱色谱分离和纯化,获得分子量均一多糖RTP-60-3V-Ⅲ。高效凝胶过滤法测定分子量分布,PMP衍生和毛细管电泳法测定单糖组成。采用高碘酸氧化-Smith降解和甲基化反应,再结合IR,NMR和GC-MS等技术对RTP-60-3V-Ⅲ进行化学结构特征的研究。采用MTT法评价RTP-60-3V-Ⅲ对阿托伐他汀、地塞米松、阿奇霉素、紫杉醇和利福平药物体外诱导LO2肝细胞损伤的影响。结果:RTP-60-3V-Ⅲ为葡聚糖,峰高分子量为4628 Da,骨架结构主要为→4,6)-α-D-Glcp-(1→以及α-D-Glcp-(1→,→4)-α-D-Glcp-(1→和→6)-α-D-Glcp-(1→这3种侧链。该多糖对阿托伐他汀、地塞米松、阿奇霉素、紫杉醇和利福平诱导的LO2细胞死亡具有明显的抑制活性,且呈良好的浓度-效应关系。结论:猫爪草多糖RTP-60-3V-III具有明显的抗药物性肝损伤活性,未来有望成为治疗药物肝损伤的候选药物。

关键词：猫爪草多糖化学结构药物性肝损伤

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南水北调工程通水对受水区农业用水的影响

自然资源学报 2024年第5期39卷 1222-1240页

作者：徐章星邱晓楠田贵良李祎雯河海大学商学院南京211100 生态文明建设与流域保护研究院南京210024 江苏长江保护与高质量发展研究基地南京210024

利用中国31个省(自治区、直辖市)2004—2021年面板数据,构建渐进双重差分模型,基于规模和结构双重视角,考察了南水北调工程通水对于受水区农业用水的影响。结果表明:(1)南水北调工程通水降低了受水区农业用水规模和农业用水占比,其中的... 详细信息

利用中国31个省(自治区、直辖市)2004—2021年面板数据,构建渐进双重差分模型,基于规模和结构双重视角,考察了南水北调工程通水对于受水区农业用水的影响。结果表明:(1)南水北调工程通水降低了受水区农业用水规模和农业用水占比,其中的作用机制为经济作物种植面积和比例的减少,以及粮食作物种植比例的增加;(2)相较于东线而言,南水北调工程通水对于受水区农业用水的负向影响在中线地区更为严重;(3)南水北调工程“通水间接返还农业用水”的效应存在,但现阶段被工程对受水区农业用水的直接效应所遮掩。因此,需要从战略高度清晰认识到南水北调工程通水对于受水区农业用水的影响,强化农业用水支撑,保障国家粮食安全,推动南水北调后续工程高质量发展。

关键词：南水北调工程通水农业用水渐进双重差分模型

Dissipation and residue of ethephon in maize field

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Journal of Integrative Agriculture 2015年第1期14卷 106-113页

作者： DONG Jian-nan MA Yong-qiang LIU Feng-mao JIANG Nai-wen JIAN qiu Department of Applied Chemistry College of ScienceChina Agricultural University Institute for the Control of Agrochemicals Ministry of Agriculture

A rapid and reliable method was developed for analysis of ethephon residues in maize, in combination with the investigation of its dissipation in field condition and stabilities during the sample storage. The residue analytical method in maize plant, maize kernel and soil was developed based on the quantification of ethylene produced from the derivatization of ethephon residue by adding the saturated potassium hydroxide solution to the sample. The determination was carried out by using the head space gas chromatography with flame ionization detector （HS-GC-FID）. The limit of quantification （LOQ） of the method for maize plant was 0.05, 0.02 mg kg-1 for maize kernel and 0.05 mg kg-1 for soil, respectively. The fortified recoveries of the method were from 84.6-102.6%, with relative standard deviations of 7.9-3.8%. Using the methods, the dissipation of ephethon in maize plant or soil was investigated. The half life of ethephon degradation was from 0.6 to 3.3 d for plant and 0.7 to 5.7 d for soil, respectively. The storage stabilities of ethephon residues were determined in fresh and dry kernels with homogenization and without homogenization process. And the result showed that ethephon residues in maize kernels were stable under-18℃ for 6 mon. The results were helpful to monitor the residue dissipation of ethephon in the maize ecosystem for further ecological risk assessment.

关键词： ethephon residue maize degradation storage stability

Variable phenotypes and outcomes associated with the MMACHC c.482G>A mutation:follow-up in a large CblC disease cohort

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World Journal of Pediatrics 2024年第8期20卷 848-858页

作者： Sheng-nan Wu Hui-Shu E Yue Yu Shi-Ying Ling Li-Li Liang Wen-Juan qiu Hui-Wen Zhang Rui-Xue Shuai Hai-Yan Wei Chi-Ju Yang Peng Xu Xi-Gui Chen Hui Zou Ji-Zhen Feng Ting-Ting Niu Hai-Li Hu Kai-Chuang Zhang De-Yun Lu Zhu-Wen Gong Xia Zhan Wen-Jun Ji Xue-Fan Gu Yong-Xing Chen Lian-Shu Han Department of Endocrinology and Metabolism Henan Key Laboratory of Children’s Genetics and Metabolic DiseasesChildren’s Hospital Affiliated to Zhengzhou UniversityHenan Children’s HospitalZhengzhou Children’s HospitalNo.255 Gangdu StreetZhengzhouChina Department of Pediatric Endocrinology and Genetics Fujian Children’s HospitalFuzhouChina The Center for Pediatric Liver Diseases Children’s HospitalFudan UniversityShanghaiChina Department of Pediatric Endocrinology/Genetics Shanghai Institute for Pediatric ResearchXinhua HospitalSchool of MedicineShanghai Jiao Tong UniversityNo.1665 Kongjiang RoadShanghaiChina Department of Pediatrics Second Affiliated Hospital of Naval Medical UniversityShanghaiChina Center of Neonatal Disease Screening Jining Maternal and Child Health Care HospitalJiningChina Center of Neonatal Disease Screening Jinan Maternal and Child Health Care HospitalJinanChina Center of Neonatal Disease Screening Shijiazhuang Maternal and Child Health Care HospitalShijiazhuangChina Center of Neonatal Disease Screening Shandong Maternal and Child Health Care HospitalJinanChina Center of Neonatal Disease Screening Hefei Maternal and Child Health Care HospitalHefeiChina

Background The aim of this study was to characterize the variable phenotypes and outcomes associated with the methylmalonic aciduria and homocystinuria type C protein gene(MMACHC)c.482G>A mutation in 195 Chinese cases with CblC *** We carried out a national,retrospective multicenter study of 195 Chinese patients with CblC disease attributable to the MMACHC c.482G>A variant either in a homozygous or compound heterozygous *** control group consisted of 200 patients diagnosed with CblC disease who did not possess the c.482G>A *** features,including disease onset,symptoms,biochemical metabolites,gene mutation,and follow-up outcomes were reviewed and analyzed in *** median follow-up period spanned 3 years and 8 months,with a range of 1 year and 2 months to 12 years and 10 *** Among 195 patients carrying the c.482G>A variant,125(64.1%)cases were diagnosed by newborn screening(NBS),60(30.8%)cases were detected due to disease onset,and 10(5.1%)cases were identified from sibling *** hundred and seventeen(93.6%)individuals who were diagnosed by NBS,and nine patients who came from sibling diagnoses remained asymptomatic in this *** 69 symptomatic patients of the c.482G>A group,more patients presented with later onset,and the top six common clinical symptoms at disease onset were developmental delay(59.4%),lower limb weakness and poor exercise tolerance(50.7%),cognitive decline(37.7%),gait instability and abnormal posture(36.2%),seizures(26.1%),and psychiatric and behavioral disturbances(24.6%).In the 159 symptomatic patients lacking c.482G>A variants,the most frequently observed clinical manifestations at disease onset included developmental delay(81.8%),lethargy and feeding difficulty(62.9%),lower limb weakness and poor exercise tolerance(54.7%),prolonged neonatal jaundice(51.6%),vomiting(47.2%),and seizures(32.7%).Before treatment,the levels of blood propionylcarnitine,propionylcarnitine/acetylcarnitine ratio

关键词： c.482G>A CblC disease MMACHC gene Newborn screening Outcome Use our pre-submission checklist Avoid common mistakes on your manuscript.

Maillard反应前体物质参与木质素微生物转化产物的FTIR光谱特性

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光谱学与光谱分析 2024年第4期44卷 1183-1190页

作者：曾玉萍王楠曹志伟宋岩郭洪鹏邱小成王帅吉林农业科技学院农学院吉林吉林132101

腐殖质(HS)是由各类前体物质缩聚而成,前体物质是调控HS形成的关键。Maillard反应前体物质能否对木质素转化、HS形成有促进作用有待验证。鉴于此,采用液体摇瓶培养法,以木质素培养液为研究对象,通过添加邻苯二酚、葡萄糖和甘氨酸的单一... 详细信息

腐殖质(HS)是由各类前体物质缩聚而成,前体物质是调控HS形成的关键。Maillard反应前体物质能否对木质素转化、HS形成有促进作用有待验证。鉴于此,采用液体摇瓶培养法,以木质素培养液为研究对象,通过添加邻苯二酚、葡萄糖和甘氨酸的单一及组合溶液,启动120 d的液体摇瓶培养,采用离心法收集上清液(细胞代谢产物)和沉淀(菌体残留物),分析两者性质并深入研究菌体残留物FTIR的光谱特性,系统评价各前体物质对木质素向HS转化的贡献。结果表明:(1)在木质素培养液中添加甘氨酸,历经液体摇瓶培养更有利于细胞代谢产物有机分子的缩合,使其结构趋于复杂,而邻苯二酚参与的4个处理及单独添加葡萄糖更易促进细胞代谢产物的降解,使其分子结构更加简单。与作为空白对照(CK)的无菌去离子水相比,外源添加Maillard反应前体物质能够促进细胞代谢产物矿化,使总有机碳(total organic carbon,TOC)含量下降,单一添加邻苯二酚能够使细胞代谢产物TOC含量始终高于其他处理;(2)添加Maillard反应前体物质可显著提升木质素微生物转化形成菌体残留物的回收率,单一添加邻苯二酚的菌体残留物回收率提升幅度最大,而邻苯二酚、葡萄糖和甘氨酸三者组合溶液对菌体残留物回收率的提升幅度最小,葡萄糖和甘氨酸的组合溶液使菌体残留物回收率在整个培养期间始终处于最高水平。添加Maillard反应前体物质使菌体残留物TOC含量的增加幅度小于CK,尽管如此,培养结束时,邻苯二酚参与的4个处理、葡萄糖和甘氨酸组合溶液的添加使菌体残留物TOC含量显著高于CK;(3)木质素经微生物转化形成的菌体残留物拥有羟基O—H、不对称脂族—CH_(3)、对称脂族—CH_(2)—、芳香碳C C及多糖类物质,与土壤胡敏酸有着相似的FTIR特征,但其分子缩合度尚无法达到土壤胡敏酸的复杂程度。各处理在完成培养后,菌体残留物中的羟基含量有着不同程度增加,而多糖含量有所下降,单一甘氨酸以及葡萄糖和甘氨酸组合溶液的添加使菌体残留物的脂族化程度提高,而邻苯二酚参与的4个处理及单独添加葡萄糖可使菌体残留物中的芳香碳比例进一步提高。综上,添加Maillard反应前体物质可促进细胞代谢产物矿化,使TOC含量下降、提高菌体残留物回收率,同时使其羟基含量增加、多糖含量降低,不同前体物质对菌体残留物脂族化和芳香化的影响规律不同,邻苯二酚参与的4个处理及单一添加葡萄糖可使菌体残留物中的芳香碳比例提高。

关键词： Maillard反应前体物质木质素菌体残留物 FTIR光谱

Microwave sintering of Ca_(0.6)La_(0.2667)TiO_3 microwave dielectric ceramics

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International Journal of Minerals,Metallurgy and Materials 2012年第3期19卷 245-251页

作者： Jia-mao Li Tai qiu College of Materials Science and Engineering Nanjing University of Technology Nanjing 210009 China School of Materials Science and Engineering Anhui University of Technology Ma＇anshan 243002 China

Ca0.6La0.2667TiO3 ceramics were prepared by conventional and microwave sintering techniques and their sinterability, microstructure, and microwave dielectric properties were investigated in detail for comparison. Densified Ca0.6La0.E667TiO3 ceramics were obtained by microwave sintering at 1350℃ for 30 min and by conventional sintering at 1450℃ for 4 h. An unusual phenomenon was found that some larger grains （grain size range： 8-10 pan） inclined to assemble in one area but some smaller ones （grain size range： 2-4 μm） inclined to gather in another area in the microwave sintered ceramics. The microwave dielectric properties of Ca0.6La0.2667TiO3 ceramics prepared by micro- wave sintering at 1350℃ were as follows＂ dielectric constant （er） = 119.6, quality factor （Qf） = 17858.5 GHz, and temperature coefficient of resonant fi＇equency （rf）= 155.5 ppm/℃. In contrast, the microwave dielectric properties of the ceramics prepared by conventional sintering at 1450℃ were er = 117.4, Qf= 13375 GHz, and rf= 217.2 ppm/℃.

关键词： pcrovskite microwave sintering microstructure dielectric properties

聚苯胺复合导电织物增强水凝胶传感器的制备与性能研究

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丝绸 2024年第10期61卷 69-78页

作者：夏娟朱晓阳毛迎吕汪洋李楠浙江理工大学纺织科学与工程学院杭州310018 浙江理工大学纺织纤维材料与加工技术国家地方联合工程实验室杭州310018

织物基柔性传感器因其柔软轻薄、灵敏度高,在可穿戴电子材料领域受到广泛关注。文章以涤氨纶混纺织物为基底材料,采用原位聚合法制备了聚苯胺(PANI)复合导电织物,再将聚乙烯醇(PVA)和壳聚糖(CS)共混制备的水凝胶涂覆于其表面,得到PANI... 详细信息

织物基柔性传感器因其柔软轻薄、灵敏度高,在可穿戴电子材料领域受到广泛关注。文章以涤氨纶混纺织物为基底材料,采用原位聚合法制备了聚苯胺(PANI)复合导电织物,再将聚乙烯醇(PVA)和壳聚糖(CS)共混制备的水凝胶涂覆于其表面,得到PANI复合导电织物增强的水凝胶传感器(PAC传感织物),并对其进行了表征和性能测试。结果表明,13%-PAC传感织物具有优异的导电性、耐低温性、抗疲劳性和抗菌性,当应变为210.8%时,其断裂强度达到8.2 MPa,灵敏度(GF)为0.461,对人体面部微表情、膝部和肘部的活动有较好的响应能力,有望应用于人体健康监测和柔性可穿戴传感器等领域。

关键词：柔性可穿戴传感器原位聚合法 PANI复合导电织物水凝胶人体运动监测

The effects of population aging on industrial structure upgrading: Empirical analysis of provincial and threshold characteristics in China

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