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Non-sampling estimation of waste composition based on incineration flue gas pollutant fingerprints and machine learning approach 认领 引用 被引量：1
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作者 Yaping Qi Pinjing He +1 位作者 Fan Lü Hua Zhang 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2026年第4期417-429,共13页
Understanding mixed waste composition is crucial for controlling pollutants in incineration flue gas.Real-time detection of pollutants is challenging owing to the complexity and heterogeneity of mixed waste,complicati... Understanding mixed waste composition is crucial for controlling pollutants in incineration flue gas.Real-time detection of pollutants is challenging owing to the complexity and heterogeneity of mixed waste,complicating incineration optimization and pollutant control.This study introduces a novel method to rapidly predict mixed waste composition using waste incineration flue gas“fingerprint”and machine learning regression models,bypassing traditional sampling processes.A comprehensive“fingerprint”dataset was established via incineration experiments with various mixed waste compositions,featuring multiple waste components and their associated flue gas pollutant concentrations.Predictive performance was compared for five machine learning models,including extreme gradient boosting tree(XGBOOST),K-nearest neighbor(KNN),random forest(RF),light gradient boosting machine(LGBM),and support vector regression(SVR).After feature importance analysis optimization,RF and XGBOOST models achieved the best performance,with R2values exceeding 0.92 for key waste types.The accuracy of the models in predicting waste composition was significantly improved compared to that without optimization.Beyond predictive accuracy,the proposed method enables near real-time waste composition estimation,offering significant advantages for dynamic adjustment of feedstock and operating parameters.This facilitates intelligent incineration control,enhances energy efficiency,and supports proactive pollution management at the emission source. 展开更多
关键词 Waste incineration Flue gas pollutant fingerprint Machine learning Feature important analysis Pollution control
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Effects of pegylated interferon on T cell receptor fingerprints in chronic hepatitis B patients with/without surface antigen clearance 认领 引用
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作者 Kun-Yan Hao Lei Tang +4 位作者 Guo-Bing Chen Wei Guo Zhan-Hui Wang Li-Peng Mao Yue-Cheng Yu 《World Journal of Hepatology》 2026年第7期73-84,共12页
BACKGROUND Chronic hepatitis B(CHB)remains a critical global health challenge,with few patients achieving spontaneous clearance of hepatitis B surface antigen(HBsAg),which is a key indicator of functional cure.T cell ... BACKGROUND Chronic hepatitis B(CHB)remains a critical global health challenge,with few patients achieving spontaneous clearance of hepatitis B surface antigen(HBsAg),which is a key indicator of functional cure.T cell plays an important role in HBsAg clearance.AIM To compare T cell receptor(TCR)fingerprints between patients with or without HBsAg clearance after pegylated interferon alpha-2b(PegIFNα-2b)added on nucleos(t)ide analogues(NAs).METHODS In this observational study,peripheral blood mononuclear cells(PBMCs)were isolated from six comparable CHB patients who achieved HBsAg clearance(Group-C)or not(Group-NC)after 48 weeks of PegIFNα-2b added to NA therapy.Patients in Group-C and Group-NC had comparable age,gender,baseline hepatitis B virus(HBV)DNA,HBsAg,hepatitis B envelop antigen(HBeAg),total bilirubin,alanine aminotransferase(ALT)and cirrhosis status.All patients had received at least one year of NA before PegIFNα-2b therapy.TCR repertoire profiles(fingerprints)were screened and compared by RNA sequencing and bioinformation analysis between the two groups.RESULTS Six male patients without cirrhosis were enrolled in this study,with three patients in each group.200 ng of RNA from each PBMC sample was extracted for standard RNA sequencing for construction of a complementary DNA library.Baseline levels of HBsAg,HBeAg,HBV DNA(0.05).It was found that compared to Group-NC,Group-C had significantly higher TCR diversity in bothαandβchain,including more unique clonotypes(P=0.017,P=0.038 respectively),more repertoire overlap(P=0.002,P=0.002 respectively),a broader complementarity-determining region3 length distribution,and higher Chao1 index(P=0.016,P=0.048 respectively).CONCLUSION Patients with HBsAg clearance had a more diverse and robust T cell response,which may correlate with HBsAg clearance status.These immune signatures may serve as potential reference indicators for PegIFNα-2b treatment response in CHB patients. 展开更多
关键词 Hepatitis B surface antigen clearance Pegylated interferonα-2b T cell receptor diversity Complementaritydetermining region 3 RNA sequencing Fingerprints
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Triphenylamine-Based Schiff Base Compounds for the Latent Fingerprints Visualization 认领 引用
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作者 Chen Fafen Chen Chunlin +7 位作者 Peng Zhi Zhang Bangcui Luo Haiyan Li Shan Gao Shulin Wang Jianfei Li Xiangguang Yang Yanhua 《有机化学》 SCIE CAS CSCD 北大核心 2025年第11期4185-4194,共10页
To further advance the development of the fluorescent dyes for latent fingerprint imaging,two triphenylamine-based Schiff base compounds containing a benzimidazole group(TPA-BZI)and a phenyl unit(TPA-Ph)were designed ... To further advance the development of the fluorescent dyes for latent fingerprint imaging,two triphenylamine-based Schiff base compounds containing a benzimidazole group(TPA-BZI)and a phenyl unit(TPA-Ph)were designed and synthesized.Photoluminescence experiments revealed that both compounds exhibited solvatochromism and intramolecular charge transfer(ICT)characteristics in six organic solvents.Additionally,they showed aggregation-induced emission(AIE)in CH3OH/water mixtures and solid-state fluorescence.These phenomena were further elucidated through time-dependent density functional theory(TD-DFT)calculations.It was also found that the two compounds could be used for latent fingerprints imaging,and could easily distinguish the details of fingerprints from Ⅰ to Ⅲ levels,which could provide the preliminary evidence to match personal identification. 展开更多
关键词 Schiff bases triphenylamine-based compounds aggregation-induced emission latent fingerprints imaging
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The evaluation of latent fingerprints exposed to different snow conditions and their usability in forensics 认领 引用
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作者 Michal Soták Mária Chovancová +1 位作者 Petra Svábová Radoslav Benus 《Forensic Sciences Research》 CSCD 2025年第4期77-84,共8页
Second level dactyloscopic markants(minutiae)are irregularities in the course of the friction ridge skin used for personal identification because of their high variability.Individual uniqueness is affected by the high... Second level dactyloscopic markants(minutiae)are irregularities in the course of the friction ridge skin used for personal identification because of their high variability.Individual uniqueness is affected by the high number of minutiae and their random distribution within the friction ridge skin.The combination of various environmental factors,e.g.,snow,soil environment,and direct sunlight,can affect the quality of fingerprints.The aim of this study was to analyze the influence of snow under two different conditions(natural snowfall and immersion in the snow)within various time intervals on fingerprints.A total of 265 groomed latent distal fingerprints were taken from a Caucasian male from Slovakia.Latent fingerprints were taken only from one participant,as the composition of sweat,i.e.,the sweat-fat substance,varies from person to person,which could influence the results.Subsequently,obtained latent fingerprints were developed using small particle reagent.We evaluated the decrease in the number of minutiae on latent fingerprints exposed to the destructive influence of snow.The results confirmed that snow has a significant effect on the quality of latent fingerprints,as a decrease in the average number of minutiae on latent prints was observed after only 2 h of exposure to snow conditions.After snow exposure,usable fingerprints for identification decreased,whilst non-usable ones increased,with 53.33%of non-usable fingerprints resulting from natural snowfall exposure.After exposure of latent fingerprints to snow immersion,98.13%of non-usable fingerprints were found.The results can help improving personal identification efficiency. 展开更多
关键词 forensic sciences personal identification dermatoglyphics latent fingerprints degradation environmental factors snow conditions forensic anthropology usability
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Optimization of a DNA extraction protocol from fingerprints for the analysis of nuclear STR and mitochondrial DNA genetic profiles 认领 引用 被引量：2
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作者 Yolanda Loarce Pilar Rubio +5 位作者 Almudena Sánchez-Sanz Ariadna Higuera Jose A.Rodríguez-Pascual Julián Blanco Esperanza Gutiérrez-Redomero Juan M.González 《Forensic Sciences Research》 CSCD 2025年第1期36-47,共12页
Most of the cells found in fingerprints belong to the cornified barrier of the epidermis(stratum corneum),lack nuclei and cytoplasmic organelles,and are filled with keratin.Nuclear and mitochondrial DNA is degraded an... Most of the cells found in fingerprints belong to the cornified barrier of the epidermis(stratum corneum),lack nuclei and cytoplasmic organelles,and are filled with keratin.Nuclear and mitochondrial DNA is degraded and embedded in the keratin mesh,a very resistant protein that is difficult to remove during DNA extraction.In this work,we studied the possible negative effect of keratin on Polymerase Chain Reaction(PCR)reactions and the influence of keratinase and proteinase K on the extraction of DNA from fingerprints.The role of glycogen in the DNA yield during the precipitation step and the importance of washing the obtained DNA with 70%ethanol were also studied.DNA was extracted from 96 fingerprints corresponding to recent prints and stored for 0,1,5,and 18 months from six individuals.No differences were observed in the concentration of extracted DNA or in the number of nuclear Short Tandem Repeat(STR)alleles in the genetic profiles of fingerprints stored during different times.However,sex differences were observed in both the concentration of DNA obtained and the number of nuclear STR alleles detected,being lower in females than in males.In 80%of the fingerprints genetic profiles were obtained with at least half of the STR nuclear markers and,in 50%of the fingerprints genetic profiles were obtained with more than 90%of the markers,which would allow an unambiguous identification of the donor.In all fingerprints where mitochondrial DNA was analyzed,complete sequencing of the HV1 and HV2 regions was possible,which increases the accuracy of the results obtained.The optimized protocol allowed obtaining a complete STR nuclear genetic profile of a 20-year-old palmprint. 展开更多
关键词 keratinase latent fingerprint STR analysis HV1 mtDNA analysis HV2 mtDNA analysis forensic DNA typing
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Prediction of second-order rate constants between carbonate radical and organics by deep neural network combined with molecular fingerprints 认领 引用 被引量：5
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作者 Peizhe Sun Huixin Ma +2 位作者 Shangyu Li Hong Yao Ruochun Zhang 《Chinese Chemical Letters》 SCIE CAS CSCD 2022年第1期438-441,共4页
Carbonate radical is among the most important environmental relevant reactive species which govern the transformation and fate of pharmaceutical contaminants(PCs).However,reaction rate constants between carbonate radi... Carbonate radical is among the most important environmental relevant reactive species which govern the transformation and fate of pharmaceutical contaminants(PCs).However,reaction rate constants between carbonate radical and most of the PCs have not been experimentally determined,and quantitative structural-activity relationships(QSARs)have not been established for rate estimation.This study applied Max Min data processing method and used molecular fingerprints(MF)as the input of a deep neural network(DNN)to predict the rate constants between carbonate radical and organic compounds.MF parameters and the hyper-structure of the DNN were adjusted to yield satisfactory accuracy of rate prediction.The vector length of 512 bits with radius of 1 for MF and 5 hidden layers gave the best performance.The optimized MaxMin-MF-DNN model was compared with some of the most commonly used QSARs and machine learning methods,including random data splitting,molecular descriptors,supporting vector machine,decision tree,etc.Results showed that the MF-DNN model out-performed the other methods by more than 10%increase in prediction accuracy.Applying this MF-DNN model,we estimated reaction rates between carbonate radical and pharmaceuticals used in human medicine(1576)and veterinary practice(390).Among them,46 drugs were identified as fast-reacting compounds,suggesting the important relations of their environmental fate with carbonate radical. 展开更多
关键词 Deep neural network Carbonate radical Molecular fingerprints QSAR Pharmaceuticals
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Visualization of latent fingerprints using Prussian blue thin films 认领 引用 被引量：8
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作者 Gang Qin Mei-Qin Zhang +4 位作者 Yang Zhang Yu Zhu Shou-Liang Liu Wen-Jin Wu Xue-Ji Zhang 《Chinese Chemical Letters》 SCIE CAS CSCD 2013年第2期173-176,共4页
Received 15 November 2012 Received in revised form 5 December 2012 Accepted 12 December 2012 Available online 20 January 2013
关键词 Forensic sciencePrussian blueElectrodepositionLatent fingerprints
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Study and Application of Fingerprints of Ginkgo biloba Leaves Preparations 认领 引用 被引量：6
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作者 徐亚萍 姚彤炜 《Journal of Chinese Pharmaceutical Sciences》 CAS 2005年第1期43-50,共8页
Aim To establish a method for determination of Ginkgo biloba L, its extractand preparations with HPLC fingerprints, so as to control the quality of the preparations. MethodsHPLC-DAD method was used to determine the co... Aim To establish a method for determination of Ginkgo biloba L, its extractand preparations with HPLC fingerprints, so as to control the quality of the preparations. MethodsHPLC-DAD method was used to determine the constituents in preparations. Diamonsil? C18 (200mm X 4.6 mm, 5 μm) was used as analytical column, and acetonitrile/KH_2PO_4 was used as mobilephase with gradient elu-tion. The column temperature was at 24 ℃. The HPLC profile of chemicalconstituents of control sample and preparations were analyzed using similarity software. Results Thefingerprints of different preparations from different companies were slightly different because ofthe different preparing procedures. Mean while, the fingerprints of different batches of the samepreparation from the same company were similar to each other and the technology of each preparationwas stable. Conclusion This method is accurate, reproducible , simple, and can be used as ananalytical method for the routine quality control of Ginkgo biloba preparations. 展开更多
关键词 ginkgo biloba high-performance liquid chromatography fingerprints similarity
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Optimization of high pressure machine decocting process for Dachengqi Tang using HPLC fingerprints combined with the Box–Behnken experimental design 认领 引用 被引量：7
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作者 Rui-Fang Xie Zhi-Na Shi +3 位作者 Zhi-Cheng Li Pei-Pei Chen Yi-Min Li Xin Zhou 《Journal of Pharmaceutical Analysis》 CAS 2015年第2期110-119,共10页
Using Dachengqi Tang（DCQT） as a model, high performance liquid chromatography（HPLC）fingerprints were applied to optimize machine extracting process with the Box–Behnken experimental design. HPLC fingerprints were... Using Dachengqi Tang（DCQT） as a model, high performance liquid chromatography（HPLC）fingerprints were applied to optimize machine extracting process with the Box–Behnken experimental design. HPLC fingerprints were carried out to investigate the chemical ingredients of DCQT; synthetic weighing method based on analytic hierarchy process（AHP） and criteria importance through intercriteria correlation（CRITIC） was performed to calculate synthetic scores of fingerprints; using the mark ingredients contents and synthetic scores as indicators, the Box–Behnken design was carried out to optimize the process parameters of machine decocting process under high pressure for DCQT. Results of optimal process showed that the herb materials were soaked for 45 min and extracted with 9 folds volume of water in the decocting machine under the temperature of 140 1C till the pressure arrived at 0.25 MPa;then hot decoction was excreted to soak Dahuang and Mangxiao for 5 min. Finally, obtained solutions were mixed, filtrated and packed. It concluded that HPLC fingerprints combined with the Box–Behnken experimental design could be used to optimize extracting process of traditional Chinese medicine（TCM）. 展开更多
关键词 Dachengqi Tang HPLC fingerprints Box–Behnken design Synthetic weighing method
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Nutritional Compositions of Maca Grown in Ebian and HPLC Fingerprints of Macaene and Macamide 认领 引用 被引量：4
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作者 陈建 夏陈 +1 位作者 朱永清 栢凤女 《Agricultural Science & Technology》 CAS 2016年第4期947-950,共4页
In the present study, the nutritional compositions of maca which was grown in a mountain area at an elevation of 2 200-2 800 m of Ebian County,Sichuan Province were measured, and then HPLC analysis on two representati... In the present study, the nutritional compositions of maca which was grown in a mountain area at an elevation of 2 200-2 800 m of Ebian County,Sichuan Province were measured, and then HPLC analysis on two representative active compounds（macaene and macamide） in the maca sample was performed.The results revealed that there were 24.20% total protein, 18.40% total amino acids（including 3.84% arginine）, 42.80% total sugars, 1.36% fat and kinds of minerals（including 1.14% potassium） in Ebian maca. HPLC fingerprints of macaene and macamide of Ebian maca were similar to those of Peru maca. The results suggested that maca could be cultivated with good quality in some mountain areas with an altitude1 000 m lower than the origin place in Peru. 展开更多
关键词 Maca Nutritional compositions Macaene Macamide HPLC fingerprints
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An improved calibrated normalized resolution product(r*') and the application in HPLC fingerprints of soy isoflavone extract 认领 引用 被引量：1
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作者 沈卫阳 卞娟 +1 位作者 刘斐烨 彭水芳 《Journal of Chinese Pharmaceutical Sciences》 CAS CSCD 2015年第3期177-184,共8页
In this paper, we proposed a novel resolution criterion（improved calibrated normalized resolution product, r＊＇） to evaluate separation quality of fingerprints. By comparing with the calibrated normalized resolutio... In this paper, we proposed a novel resolution criterion（improved calibrated normalized resolution product, r＊＇） to evaluate separation quality of fingerprints. By comparing with the calibrated normalized resolution product（r＊） and the hierarchical chromatographic response function（HCRF）, the validity of this criterion was demonstrated by experimental chromatograms. The soy isoflavone extract was selected as the analytical object. The initial and end percentages of methanol and elution time affecting gradient elution were tested by orthogonal design. The final optimized conditions were as follows. It was detected by UV absorbance at 254 nm, column temperature was maintained at 36 oC, solvent A was 0.1%（v/v） acetic acid, solvent B was methanol, gradient elution was from 34% to 65% B in a linear gradient in 25 min, and the flow-rate was set at 1.0 m L/min. In addition, the main ingredients of the soy isoflavone extract were confirmed by LC-ESI/MS. 展开更多
关键词 Improved calibrated normalized resolution product Fingerprints Soy isoflavones LC-ESI/MS
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One pot synthesis of TiO_2:Eu3+ hierarchical structures as a highly specific luminescent sensing probe for the visualization of latent fingerprints 认领 引用 被引量：8
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作者 K.R.Venkatesha Babu C.G.Renuka +2 位作者 R.B.Basavaraj G.P.Darshan H.Nagabhushana 《Journal of Rare Earths》 SCIE EI CAS CSCD 2019年第2期134-144,共11页
In the present work, TiO2:Eu3+ (1 mol%e11 mol%) nano powders(NPs) were prepared via a facile one-pot hydrothermal method by using Epigallocatechin Gallate(EGCG) as bio-surfactant. The optimized TiO2:Eu3+ (5 mol%... In the present work, TiO2:Eu3+ (1 mol%e11 mol%) nano powders(NPs) were prepared via a facile one-pot hydrothermal method by using Epigallocatechin Gallate(EGCG) as bio-surfactant. The optimized TiO2:Eu3+ (5 mol%) NPs can be used as fluorescent labeling agent for visualizing of latent fingerprints(LFPs) on various porous and non-porous surfaces. The obtained results exhibit well defined ridge details with high sensitivity, selectivity, and low background hindrance which show greater advantages as compared to conventional powders. We demonstrated the viability of high-performance security labels thorough excellent luminescence for practical anti-mimetic applications. Morphology of the prepared samples is highly dependent on pH, concentration of the bio-surfactant, temperature and time durations.Photoluminescence(PL) emission spectra exhibit intense red emission at ~ 615 nm due to electric dipole transition(~5 D_0/~7 F_2). Photometric(CIE and CCT) results clearly show the intense warm red emission of the optimized samples. Therefore, this work offers a superior and universal luminescent label, which can be applied to visualize miniature LFPs particulars for individualization and consequently display great prospective in forensic investigation. 展开更多
关键词 Nano powder Photoluminescence Latent fingerprints Bio-surfactant Rare earths
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Simultaneous extraction of level 2 and level 3 characteristics from latent fingerprints imaged with quantum dots for improved fingerprint analysis 认领 引用 被引量：7
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作者 Yuqin Li Chaoying Xu +2 位作者 Chang Shu Xiandeng Hou Peng Wu 《Chinese Chemical Letters》 SCIE CAS CSCD 2017年第10期1961-1964,共4页
Fingerprints are unique and life-long to everyone, so they occupy very important statuses in forensic science. However, due to the limit of current imaging technologies and instruments, recognition and matching of fin... Fingerprints are unique and life-long to everyone, so they occupy very important statuses in forensic science. However, due to the limit of current imaging technologies and instruments, recognition and matching of fingerprints are mostly based on their level 2 structures（bifurcation, crossover, and etc.）.Moreover, in real-world cases, fingerprints collected in the field are often incomplete or damaged, which adds further difficulty in fingerprint analysis. Quantum dots（QDs） are superior fluorescent imaging agents for latent fingerprints, which can provide both level 2 and level 3（sweat pores） details. Here, we used red-emitting N-acetylcysteine-capped Cd Te QDs as imaging agent for staining of eccrine LFPs. The numbers of level 2 and level 3 features that can be mapped are significantly larger than those obtained by cyanoacrylate fuming, a standard technique being adopted at forensic scene. Therefore, the level 2 and level 3 characteristics from QD-staining were simultaneously extracted for improved fingerprint analysis.A preliminary fingerprint matching based modified Pore Matching algorithm was thus developed based on the integration of both level 2 and level 3 characteristics. Satisfactory results of fingerprint matching were obtained, demonstrating the advantage of the QD-staining for advanced fingerprint analysis. 展开更多
关键词 Quantum dots Latent fingerprints Sweat pore Fluorescent imaging Fingerprint matching
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Vitellaria paradoxa nutshells from seven sub-Saharan countries as potential herbal medicines for treating diabetes based on chemical compositions, HPLC fingerprints and bioactivity evaluation 认领 引用 被引量：2
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作者 LI Da XIAO Jian-Qi +7 位作者 LIU Wen-Yuan ZHANG Chao-Feng AKIHISA Toshihiro ABE Masahiko MASTERS Eliot-T. ZHAI Wei-Wei FENG Feng ZHANG Jie 《Chinese Journal of Natural Medicines》 SCIE CAS CSCD 2019年第6期446-460,共15页
The aim of the study was to determine the feasibility of the Vitellaria paradoxa nutshell as a new medicinal resource for treating diabetes. A total of forty-one compounds were identified by HPLC-DAD-Q-TOF-MS and phyt... The aim of the study was to determine the feasibility of the Vitellaria paradoxa nutshell as a new medicinal resource for treating diabetes. A total of forty-one compounds were identified by HPLC-DAD-Q-TOF-MS and phytochemical methods in V. paradoxa nutshell methanol extract. Based on HPLC fingerprints, four characteristic constituents were quantified and the origin of twenty-eight V. paradoxa nutshells from seven sub-Saharan countries was compared, which were classified into three groups with chemometric method. Twenty-eight samples contained high total phenolic content, and exhibited moderate-higher antioxidant activity and strong α-glucosidase inhibitory activity. Furthermore, all fractions and isolated compounds were evaluated for their antioxidant and α-glucosidase inhibitory activities, and α-glucosidase inhibitory action mechanism of four characteristic constituents including protocatechuic acid, 3, 5, 7-trihydroxycoumarin,(2 R, 3 R)-(+)-taxifolin and quercetin was investigated via molecular docking method, which were all stabilized by hydrogen bonds with α-glucosidase. The study provided an effective approach to waste utilization of V. paradoxa nutshell, which would help to resolve waste environmental pollution and provide a basis for developing potential herbal resource for treating diabetes. 展开更多
关键词 Vitellaria paradoxa HPLC fingerprints Antioxidant activity α-Glucosidase inhibitory activity Molecular docking
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Digital capture of fingerprints in a disaster victim identification setting:a review and case study 认领 引用 被引量：4
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作者 Bryan T.Johnson John A.J.M.Riemen 《Forensic Sciences Research》 CSCD 2019年第4期293-302,共10页
Identification of victims following a mass fatality is conducted by collecting and analysing a series of scientific identifiers and contextual information of each decedent.Recently,there has been a paradigm shift dema... Identification of victims following a mass fatality is conducted by collecting and analysing a series of scientific identifiers and contextual information of each decedent.Recently,there has been a paradigm shift demanding that this complex identification process be accelerated to meet the needs of the surviving families,politicians and even the media.Postmortem fingerprint identification is a fast and efficient means of victim identification,and through the use of new advances in technology,the digital capture of fingerprints in a disaster victim identification(DVI)setting will play a strong role.This paper provides an overview of current technology and explains how this technology can adapt to current DVI procedures.The Malaysian Airlines Flight 17(MH17)incident is a recent example of a DVI event that utilized new digital fingerprint capture technology and further demonstrates why such technology is warranted in future mass fatality operations. 展开更多
关键词 Forensic sciences disaster victim identification postmortem fingerprints digital fingerprint capture INTERPOL DVI ridgeology
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Analysis of GC×GC fingerprints from medicinal materials using a novel contour detection algorithm:A case of Curcuma wenyujin 认领 引用 被引量：1
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作者 Xinyue Yang Yingyu Sima +2 位作者 Xuhuai Luo Yaping Li Min He 《Journal of Pharmaceutical Analysis》 SCIE CAS CSCD 2024年第4期542-551,共10页
This study introduces an innovative contour detection algorithm,PeakCET,designed for rapid and efficient analysis of natural product image fingerprints using comprehensive two-dimensional gas chromatogram(GC×GC).... This study introduces an innovative contour detection algorithm,PeakCET,designed for rapid and efficient analysis of natural product image fingerprints using comprehensive two-dimensional gas chromatogram(GC×GC).This method innovatively combines contour edge tracking with affinity propagation(AP)clustering for peak detection in GC×GC fingerprints,the first in this field.Contour edge tracking signif-icantly reduces false positives caused by“burr”signals,while AP clustering enhances detection accuracy in the face of false negatives.The efficacy of this approach is demonstrated using three medicinal products derived from Curcuma wenyujin.PeakCET not only performs contour detection but also employs inter-group peak matching and peak-volume percentage calculations to assess the compositional similarities and differences among various samples.Furthermore,this algorithm compares the GC×GC fingerprints of Radix/Rhizoma Curcumae Wenyujin with those of products from different botanical origins.The findings reveal that genetic and geographical factors influence the accumulation of secondary metabolites in various plant tissues.Each sample exhibits unique characteristic components alongside common ones,and vari-ations in content may influence their therapeutic effectiveness.This research establishes a foundational data-set for the quality assessment of Curcuma products and paves the way for the application of computer vision techniques in two-dimensional(2D)fingerprint analysis of GC×GC data. 展开更多
关键词 GC×GC Image fingerprints Contour detection Clustering of mass spectra Curcuma products
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Molecular Fingerprints of Soil Organic Matter in a Typical Freshwater Wetland in Northeast China 认领 引用 被引量：8
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作者 LI Zhe ZHANG Zhongsheng +5 位作者 XUE Zhenshan SONG Xiaolin ZHANG Hongri WU Haitao JIANG Ming LYU Xianguo 《Chinese Geographical Science》 SCIE CSCD 2019年第4期700-711,共12页
Natural wetlands are known to store huge amounts of organic carbon in their soils. Despite the importance of this storage,uncertainties remain about the molecular characteristics of soil organic matter(SOM), a key fac... Natural wetlands are known to store huge amounts of organic carbon in their soils. Despite the importance of this storage,uncertainties remain about the molecular characteristics of soil organic matter(SOM), a key factor governing the stability of soil organic carbon(SOC). In this study, the molecular fingerprints of SOM in a typical freshwater wetland in Northeast China were investigated using pyrolysis gas-chromatography/mass-spectrometry technology(Py-GC/MS). Results indicated that the SOC, total nitrogen(TN),and total sulfur contents of the cores varied between 16.88% and 45.83%, 0.93% and 2.82%, and 1.09% and 3.79%, respectively. The bulk δ^13C and δ^15N varied over a range of 9.85‰, between –26.85‰ and –17.00‰, and between –0.126‰ and 1.002‰, respectively. A total of 134 different pyrolytic products were identified, and they were grouped into alkyl(including n-alkanes(C:0) and n-alkenes(C:1),aliphatics(Al), aromatics(Ar), lignin(Lg), nitrogen-containing compounds(Nc), polycyclic aromatic hydrocarbons(PAHs), phenols(Phs), polysaccharides(Ps), and sulfur-containing compounds(Sc). On average, Phs moieties accounted for roughly 24.11% peak areas of the total pyrolysis products, followed by Lg(19.27%), alkyl(18.96%), other aliphatics(12.39%), Nc compounds(8.08%), Ps(6.49%), aromatics(6.32%), Sc(3.26%), and PAHs(1.12%). Soil organic matter from wetlands had more Phs and Lg and less Nc moieties in pyrolytic products than soil organic matters from forests, lake sediments, pastures, and farmland.δ^13 C distribution patterns implied more C3 plant-derived soil organic matter, but the vegetation was in succession to C4 plant from C3 plant. Significant negative correlations between Lg or Ps proportions and C3 plant proportions were observed. Multiple linear analyses implied that the Ar and Al components had negative effects on SOC. Alkyl and Ar could facilitate ratios between SOC and total nitrogen(C/N), while Al plays the opposite role. Al was positively related to the ratio of dissolved organic carbon(DOC) to SOC. In summary, SOM of wetlands might characterize by more Phs and lignin and less Nc moieties in pyrolytic products. The use of Pyrolysis gas-chromatography/mass-spectrometry(Py-GC/MS) technology provided detailed information on the molecular characteristics of SOM from a typical freshwater wetland. 展开更多
关键词 molecular fingerprint soil organic matter pyrolysis gas-chromatography/mass-spectrometry freshwater marsh Northeast China
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Development of the fingerprints of crude Pu-erh tea and ripened Pu-erh tea by high-performance liquid chromatography 认领 引用 被引量：20
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作者 张梁 李宁 +2 位作者 车彦云 马治中 屠鹏飞 《Journal of Chinese Pharmaceutical Sciences》 CAS 2011年第4期352-359,共8页
A simple and accurate high-performance liquid chromatography（HPLC）method to generate the fingerprints of crude Pu-erh tea（CPT）and ripened Pu-erh tea（RPT）is described.A suitable chromatographic system was establi... A simple and accurate high-performance liquid chromatography（HPLC）method to generate the fingerprints of crude Pu-erh tea（CPT）and ripened Pu-erh tea（RPT）is described.A suitable chromatographic system was established using a linear gradient elution with acetonitrile and water containing 0.6% formic acid as the mobile phase and a detection wavelength of 300 nm.HPLC analysis identified 24 common peaks among RPT and 21 common peaks among CPT.This study revealed that crude Pu-erh tea and ripened Pu-erh tea contained some similar major constituents,but with distinctive peaks,which may be caused by the difference in the fermentation process.This HPLC fingerprint method could be used to evaluate and authenticate crude Pu-erh tea and ripened Pu-erh tea. 展开更多
关键词 HPLC fingerprint Pu-erh tea Quality control
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Development of the fingerprints for the quality evaluation of Viscum coloratum by high performance liquid chromatography 认领 引用 被引量：8
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作者 Yun-Li Zhao Rong-Hua Fan +3 位作者 Hong-Xia Yuan Miao Yu Kai-Shun Bi Zhi-Guo Yu 《Journal of Pharmaceutical Analysis》 CAS 2011年第2期113-118,共6页
A high-performance liquid chromatography coupled ultraviolet （HPLC-UV） method was developed for a chemical fingerprint analysis of Viscum coloratura. Eighteen peaks were selected as the common peaks and Homoeriodict... A high-performance liquid chromatography coupled ultraviolet （HPLC-UV） method was developed for a chemical fingerprint analysis of Viscum coloratura. Eighteen peaks were selected as the common peaks and Homoeriodictyol-7-O-β-D-apiosiyl-（1→2）-β-D-glucoside was used as a reference. The relative areas of common peaks were used for hierarchical clustering analysis and similarity calculation. Thirty-seven samples collected from different sources were classified into five groups. The similarities of 21 batches Viscum coloratura samples were beyond 0.90. The results obtained suggest that the chromatographic fingerprint can efficiently identify Viscum coloratum. Additionally, the fingerprints can then be used to evaluate the correlation between Viscum coloratura and hosts. 展开更多
关键词 Viscum coloratum quality high-performance liquid chromatography fingerprint
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Synthesis of D-A typed AIE luminogens in isomeric architecture and their application in latent fingerprints imaging 认领 引用
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作者 Peijuan Zhang Qifei Shen +8 位作者 Yu Zhou Fengyi He Bo Zhao Zhi Wang Ruohan Xu Yanzi Xu Zhiwei Yang Lingjie Meng Dongfeng Dang 《Chinese Chemical Letters》 SCIE CAS CSCD 2023年第8期365-369,共5页
Among the emitters in powder dusting to visualize the latent fingerprints(LFPs),aggregation-induced emission luminogens(AIEgens)are well employed for their high brightness and resistance to photobleaching.However,the ... Among the emitters in powder dusting to visualize the latent fingerprints(LFPs),aggregation-induced emission luminogens(AIEgens)are well employed for their high brightness and resistance to photobleaching.However,the serious background interference and low resolution still limit their fast development.Therefore,to further enhance the signal-to-noise ratio in LFPs imaging,especially to improve the analysis for level 3 details,donor-acceptor(D-A)typed AIEgens of DTPA-2,3-P,DTPA-2,5-P and DTPA-2,6-P are designed here.It is observed that strong emission covering from 450nm to 650nm can be obtained for all these molecules,especially that a high PLQY value of 10.06%in solids is achieved in DTPA-2,3-P.This is much higher than that of the other two cases(0.80%and 0.51%).By utilizing the DTPA-2,3-P in powder dusting,fluorescence imaging of LFPs can be clearly captured on both smooth and rough substrates.Moreover,confocal laser scanning microscope(CLSM)enables us to achieve high-resolution LFPs imaging in both 2D and 3D views,providing more detailed information of fingerprints pores in width,distance,distribution,and shapes.The results here demonstrate that highly emissive AIEgen of DTPA-2,3-P could be an excellent candidate for the visualization of fingerprints,thus providing the potential application in criminal investigation in the future. 展开更多
关键词 Aggregation-induced emission Fluorescence imaging Latent fingerprints Powder dusting Organic emitters
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