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HPLC-DAD法同时测定褐变金银花中15种活性成分含量

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时珍国医国药 2024年第5期35卷 1101-1105页

作者：孙丹于晓段言峰范剑张龙霏张芳张永清李佳刘玉红山东中医药大学药学院山东济南250355 山东医药技师学院山东泰安271016 普瑞特机械制造股份有限公司山东泰安271016

目的阐释褐变对金银花药材质量的影响。方法采用HPLC-DAD法比较褐变和正常金银花样品中15种成分(5种酚酸类成分、4种黄酮类成分、6种环烯醚萜苷类成分)的含量,采用SIMCA14.1软件进行主成分(PCA)、正交偏最小二乘法分析(OPLS-DA)。结果... 详细信息

目的阐释褐变对金银花药材质量的影响。方法采用HPLC-DAD法比较褐变和正常金银花样品中15种成分(5种酚酸类成分、4种黄酮类成分、6种环烯醚萜苷类成分)的含量,采用SIMCA14.1软件进行主成分(PCA)、正交偏最小二乘法分析(OPLS-DA)。结果褐变后,金银花中酚酸类成分、黄酮类成分及15种成分的总含量均显著下降,环烯醚萜苷类成分中断氧化马钱子苷、莫诺苷和獐牙菜苷含量及6种环烯醚萜苷类成分总含量也显著下降。PCA和OPLS-DA分析结果表明,正常样品与褐变样品各聚为一类,差异显著,VIP分析结果表明,绿原酸、异绿原酸A、断马钱子酸是区别正常样品和褐变样品的主要差异成分。结论褐变会导致金银花药材质量下降,在产地加工过程中应采用适宜方法降低褐变发生率,提升临床用金银花质量。

关键词：金银花褐变环烯醚萜苷酚酸黄酮

北祁连西段小关山金矿岩石年代学、火山岩地球化学特征及其地质意义

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甘肃地质 2024年第2期33卷 29-42页

作者：胡小春申瑞汤庆艳杨镇熙沈清杰郑亮英赵吉昌连志义甘肃省地质矿产勘查开发局第四地质矿产勘查院甘肃酒泉735000 甘肃省矿产资源勘查重点实验室甘肃酒泉735000 兰州大学地质科学与矿产资源学院甘肃兰州730000

小关山金矿位于北祁连造山带中段,通过岩石年代学研究,测得小关山一带玄武岩、玄武质安山岩铷—锶年龄分别为(455.8±1.9)Ma、(453.5±2.6)Ma,代表了火山岩的成岩年龄,花岗闪长岩LA-ICP-MS锆石U-Pb年龄为(433±2)Ma,代表了岩体侵位年龄... 详细信息

小关山金矿位于北祁连造山带中段,通过岩石年代学研究,测得小关山一带玄武岩、玄武质安山岩铷—锶年龄分别为(455.8±1.9)Ma、(453.5±2.6)Ma,代表了火山岩的成岩年龄,花岗闪长岩LA-ICP-MS锆石U-Pb年龄为(433±2)Ma,代表了岩体侵位年龄属早志留世,其成矿时代应晚于花岗闪长岩侵入年龄(433±2)Ma。地球化学特征表明分异性元素Pb、W、As、Sb、Au分布极不均匀,成矿概率极大,显示火山岩分异程度较高,属于玄武岩—玄武安山岩的范围,具有低铁、高铝特征,具岛弧和洋脊火山岩的特点。玄武岩稀土总量平均值为117.31×10^(-6),∑LREE/∑HREE比值1.8~5.07,∑Er-Lu=5.0×10^(-6)~15.0×10^(-6),∑Sm-Ho=18.0×10^(-6)~30.0×10^(-6),∑LaNd=55.0×10^(-6)~77.0×10^(-6),微量和稀土元素特征与弧后盆地玄武岩的特征相似,Ba/Th为11.3~40.7,表明岩浆过程中存在俯冲流体的加入,样品^(87)Sr/^(86)Sr的初始比值为0.7054047和0.705669,La/Yb(0.97~3.77)和Sm/Yb(0.97~2.16)比值表明小关山火山岩的形成与富集地幔高程度熔融作用有关。说明其形成在弧后和岛弧环境,受俯冲造山作用和碰撞造山作用的双向构造机制制约。岩体的侵位与含矿流体的运移过程中,含矿热源形成富集,石英细脉、蛋白石等的析出伴随着金属硫化物的带出,赋矿岩石明显发生硅化、黄铁矿、毒砂化,金元素的再次运移富集形成金矿体。

关键词：北祁连岛弧盆岩石年代学构造环境小关山金矿

Simple nonlinear model for the relationship between maize yield and cumulative water amount

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Journal of Integrative Agriculture 2017年第4期16卷 858-866页

作者： LIU Cheng SUN Bao-cheng TANG Huai-jun WANG Tian-yu LI Yu ZHANG Deng-feng XIE xiao-qing SHI Yun-su SONG Yan-chun YANG xiao-hong LI Jian-sheng Maize Research Center China Agricultural University Institute of Grain Crops Xinjiang Academy of Agricultural Sciences Institute of Crop Sciences Chinese Academy of Agricultural Sciences

Both the additive and multiplicative models of crop yield and water supply are polynomial equations, and the number of parameters increases linearly when the growing period is specified. However, interactions among multiple parameters occasionally lead to unreasonable estimations of certain parameters, which were water sensitivity coefficients but with negative value. Additionally, evapotranspiration must be measured as a model input. To facilitate the application of these models and overcome the aforementioned shortcomings, a simple model with only three parameters was derived in this paper based on certain general quantitative relations of crop yield （Y） and water supply （W）. The new model, Y/Y-W＊/（W＊＋w＊）, fits an S or a saturated curve of crop yield with the cumulative amount of water. Three parameters are related to biological factors： the yield potential （Y＊）, the water requirement to achieve half of the yield potential （half-yield water requirement, wh）, and the water sensitivity coefficient （k）. The model was validated with data from 24 maize lines obtained in the present study and 17 maize hybrids published by other authors. The results showed that the model was well fit to the data, and the normal root of the mean square error （NRMSE） values were 2.8 to 17.8% （average 7.2%） for the 24 maize lines and 2.7 to 12.7% （average 7.4%） for the 17 maize varieties. According to the present model, the maize water-sensitive stages in descending order were pollen shedding and silking, tasselling, jointing, initial grain filling, germination, middle grain filling, late grain filling, and end of grain filling. This sequence was consistent with actual observations in the maize field. The present model may be easily used to analyse the water use efficiency and drought tolerance of maize at specific stages.

关键词： yield water model maize water sensitivity drought tolerance

Concealed mesenteric ischemia after total knee arthroplasty:A case report

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World Journal of Clinical Cases 2021年第22期9卷 6515-6521页

作者： Sheng-Yang Zhang Bang-Jian He Hui-Hui Xu Miao-Miao xiao Jing-Jing Zhang Pei-Jian tong Qiang Mao Department of Orthopedics Shaoxing Hospital of Traditional Chinese MedicineShaoxing 312000Zhejiang ProvinceChina Department of Orthopedics and Traumatology The First Affiliated Hospital of Zhejiang Chinese Medical UniversityHangzhou 310006Zhejiang ProvinceChina Institute of Orthopedics and Traumatology The First College of Clinical MedicineZhejiang Chinese Medical UniversityHangzhou 310053Zhejiang ProvinceChina The Second People’s Hospital of xiaoshan District Hangzhou 311241Zhejiang ProvinceChina

BACKGROUND In critical care medicine,mesenteric ischemia(MI)is a life-threatening disease that can be present in both critically ill patients and those undergoing major *** the first time,we report a case of concealed MI with a long course after knee *** SUMMARY A male patient underwent left total knee arthroplasty for gouty arthritis and developed a persistent fever and persistently high levels of serum infection markers after *** was considered to have a periprosthetic site infection and treated with antibiotics and colchicine,periprosthetic debridement was performed,and the spacer was replaced,but no improvement was *** 54 d after arthroplasty,the patient developed gastrointestinal symptoms of nausea and vomiting,abdominal distention,and subsequently,cloudiness of consciousness,and hypotensive ***,the patient was diagnosed with ascending colonic mesentery ischemia with necrosis after laparotomy,which improved after right *** Concealed MI without gastrointestinal symptoms after major surgery is rare and easily *** surgeons need to be aware of this complication.

关键词： Concealed mesenteric ischemia Total knee arthroplasty Complication Case report

Mixed large and small cell neuroendocrine carcinoma of the stomach:A case report and review of literature

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World Journal of Clinical Cases 2022年第16期10卷 5502-5509页

作者： Ze-Feng Li Hai-Zhen Lu Ying-Tai Chen xiao-Feng Bai tong-Bo Wang He Fei Dong-Bing Zhao Department of Pancreatic and Gastric Surgical Oncology National Cancer Center/National Clinical Research for Cancer/Cancer HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100021China Department of Pathology National Cancer Center/National Clinical Research for Cancer/Cancer HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100021China

BACKGROUND Gastric neuroendocrine carcinoma(GNEC)is a rare histological subtype of gastric cancer,which is categorized into small cell and large cell neuroendocrine *** is characterized by strong invasiveness and poor *** large and small cell neuroendocrine carcinoma(L/SCNEC)is an extremely rare pathological type of gastric cancer,and there have been no reports on this situation until *** SUMMARY Herein,we first present a 57-year-old patient diagnosed with L/SCNEC of the stomach.A 57-year-old Chinese male presented with epigastric *** gastroscopic biopsy was performed,and pathological examination revealed that the cardia was invaded by *** patient underwent laparoscopic-assisted radical proximal subtotal gastrectomy and was diagnosed with L/*** refused adjuvant treatment and was followed up every 3 *** months after the operation,the patient showed no evidence of local recurrence or distant *** We advocate conducting further genomic studies to explore the origin of gastric large cell and small cell neuroendocrine carcinoma and using different chemotherapy schemes according to large or small cell neuroendocrine carcinoma of the stomach for clinical research to clarify the heterogeneity of GNEC and improve the prognosis of patients with GNEC.

关键词： Gastric cancer Neuroendocrine carcinoma Subtypes Tumorigenesis Treatments Case report

Serum microRNA-221 as a biomarker for diabetic retinopathy in patients associated with type 2 diabetes

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International Journal of Ophthalmology(English edition) 2018年第12期11卷 1889-1894页

作者： He-Nan Liu Xun Li Na Wu Meng-Meng tong Shuo Chen Shan-Shan Zhu Wei Qian xiao-Long Chen Department of Ophthalmology Shengjing Hospital China Medical University Department of Endocrinology Shengjing Hospital China Medical University Sino-Dutch Biomedical and Information Engineering School Northeastern University Department of Electrical and Computer Engineering College of Engineering University of Texas at El Paso

AIM: To investigate the candidate microRNA(miRNA), miR-221 as a novel biomarker for diabetic retinopathy(DR) in patients associated with type 2 diabetes(T2D).METHODS: The subjects involved were divided into four groups: healthy control(HC), no diabetic retinopathy(NDR), non-proliferative diabetic retinopathy(NPDR) and proliferative diabetic retinopathy(PDR) group. Serum miR-221 was validated by real-time quantitative reversetranscription polymerase chain reaction(qRT-PCR). Also, serum angiotensin II(Ang II) and vascular endothelial growth factor(VEGF) were examined by enzyme-linked immunosorbent assay. In addition, receiver operating characteristic(ROC) curve was performed to explore the diagnostic accuracy of miR-221, Ang Ⅱ and VEGF for DR in patients with T2D. Spearman’s rank correlation coefficient was executed to estimate the correlations of serum miR-221 with metabolic parameters and serum markers in patients with ***: Primarily, serum miR-221, Ang Ⅱ and VEGF were increased significantly in T2D patients compared to HC participant respectively, and progressive up-regulated in NDR, NPDR and PDR groups(P<0.001). Additionally, miR-221 in serum was remarkably positively correlatedwith metabolic parameters such as glycated hemoglobin(r=0.310, P=0.002) and homeostasis model assessment for insulin resistance(r=0.413, P<0.001), as well as serum markers for instance Ang Ⅱ(r=0.667, P<0.001) and VEGF(r=0.499, P<0.001). Furthermore, serum miR-221(AUC, 0.894; 95%CI, 0.833-0.955; P<0.001), Ang Ⅱ(AUC, 0.888; 95%CI, 0.828-0.949; P<0.001) and VEGF(AUC, 0.785; 95%CI, 0.695-0.875; P<0.001) had evidently diagnostic efficiency in DR, and miR-221 is the most effective among ***: Serum miR-221 as a potential biomarker could be related to not only occurrence but also progression for DR in patients with T2D. However, a prospective clinical trial is warranted.

关键词： microRNA-221 biomarker diabetic retinopathy type 2 diabetes

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我国茶叶拼配技术的发展与应用

中国茶叶 2024年第9期46卷 1-9页

作者：王硕邱桐姜青石震李俊贤李露青宋彦宁井铭戴前颖安徽农业大学茶与食品科技学院安徽合肥230036 安徽农业大学茶树生物学与资源利用国家重点实验室安徽合肥230036 安徽农业大学工学院安徽合肥230036

茶叶拼配是提升茶叶外观、口感,稳定茶产品品质,提高茶叶经济效益的重要工艺手段。拼配技术的发展也是中国茶产业发展的缩影,因此,对茶叶拼配技术的发展进行研究具有重要意义。文章概述了茶叶拼配的概念、茶叶拼配在茶产品上的应用、茶... 详细信息

茶叶拼配是提升茶叶外观、口感,稳定茶产品品质,提高茶叶经济效益的重要工艺手段。拼配技术的发展也是中国茶产业发展的缩影,因此,对茶叶拼配技术的发展进行研究具有重要意义。文章概述了茶叶拼配的概念、茶叶拼配在茶产品上的应用、茶叶拼配技术、设备等,提炼了茶叶拼配存在的问题,展望了未来的发展趋势,以期为茶叶拼配技术及其设备的发展提供参考。

关键词：茶叶拼配拼配应用拼配技术拼配设备

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鱼胶品种的DNA条形码鉴定方法研究

食品安全质量检测学报 2024年第3期15卷 232-239页

作者：姚丽锋张娟黎财慧张晴阳周臣清林靖丁琦游淑珠王小玉拱北海关技术中心珠海519015 广东产品质量监督检验研究院佛山528300

目的建立鱼胶种属鉴别的DNA条形码方法。方法使用不同试剂盒对鱼胶核酸提取效果进行评价和优化,筛选出适用于鱼胶的核酸提取方法,选取3对引物进行扩增对比,建立鱼胶种属鉴别的DNA条形码方法。基于建立的方法,对44份鱼胶样品进行特异性扩... 详细信息

目的建立鱼胶种属鉴别的DNA条形码方法。方法使用不同试剂盒对鱼胶核酸提取效果进行评价和优化,筛选出适用于鱼胶的核酸提取方法,选取3对引物进行扩增对比,建立鱼胶种属鉴别的DNA条形码方法。基于建立的方法,对44份鱼胶样品进行特异性扩增,并根据生命条形码系统(barcode of life data system,BOLD)进行物种鉴定,同时进行系统进化分析。结果对44份鱼胶样品的鉴定结果显示,样品分属8科,11属,15种,石首鱼科(15个)和尖吻鲈科(20个)占比79.5%。系统发育分析表明,同物种的不同个体都聚在了一起,同属以及同科不同属的物种也聚在一支,界限分明。序列比对和系统发育分析较一致确认鱼胶所属的鱼类种类。结论建立的方法能高效、准确地对鱼胶进行种属鉴定,研究结果可有效预防和降低鱼胶产品交易中的欺诈行为,也为促进我国鱼胶产品的高质量发展和进出口贸易的稳定发展提供有利的技术支持。

关键词：鱼胶 DNA条形码物种鉴定

Direct reuse of oxide scrap from retired lithium-ion batteries:advanced cathode materials for sodium-ion batteries

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Rare Metals 2023年第5期42卷 1603-1613页

作者： Miao Du Kai-Di Du Jin-Zhi Guo Yan Liu Vanchiappan Aravindan Jia-Lin Yang Kai-Yang Zhang Zhen-Yi Gu xiao-tong Wang Xing-Long Wu Faculty of Chemistry Northeast Normal UniversityChangchun130024China MOE Key Laboratory for UV Light-Emitting Materials and Technology Northeast Normal UniversityChangchun130024China Department of Chemistry Indian Institute of Science Education and Research(IISER)Tirupati517507India

The direct reuse of retired lithium-ion batteries(LIBs)cathode materials is one of the optimum choices for"waste-to-wealth"by virtue of sustainable and high economic *** the harmfulness of retired LIBs and the serious shortage of lithium resources,in this work,the spent oxide cathode materials after simple treatment are directly applied to the sodium-ion batteries(SIBs)and exhibit promising application possibilities in advanced *** spent oxide cathode shows an appropriate initial discharge capacity of 109 mAh·g^(-1)and exhibits transition and activation processes at a current density of 25 mA·g^(-1).Further,it demonstrates decent cycle performance and comparatively good electrode kinetics performance(the apparent ion diffusion coefficient at steady state is about 1×10^(-12)cm^(2)·s^(-1)).The"waste-towealth"concept of this work provides an economical and sustainable strategy for directly reusing the retired LIBs and supplies a large amount of raw material for the largescale application of SIBs.

关键词： Spent lithium-ion batteries(LIBs) Oxides Reuse Sodium-ion batteries(SIBs) Kinetics property