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Hydrothermal Scenario for Amino Acids and Sulfur-Containing Amino Acids Formation.
IF 1.2 4区 化学
Acta Chimica Slovenica Pub Date : 2025-03-05 DOI: 10.17344/acsi.2024.9098
Sofia Slavova, Nina Stoyanova, Sonya Harizanova, Ivayla Dincheva, Mila Rusanova, Sofiya Ivanovska, Venelin Enchev
{"title":"Hydrothermal Scenario for Amino Acids and Sulfur-Containing Amino Acids Formation.","authors":"Sofia Slavova, Nina Stoyanova, Sonya Harizanova, Ivayla Dincheva, Mila Rusanova, Sofiya Ivanovska, Venelin Enchev","doi":"10.17344/acsi.2024.9098","DOIUrl":"10.17344/acsi.2024.9098","url":null,"abstract":"<p><p>The chemical evolution of amino acids, especially sulfur-containing ones, requires appropriate conditions and natural sources to provide starting prebiotic compounds. In the present study hydrothermal vents, volcanoes and oceans were chosen as a plausible environment, where prebiotic reactions take place. The suggested reaction network starts only with three compounds - water, hydrogen cyanide/formamide and hydrogen sulfide. The present study suggests one-pot hydrothermal experiment in laboratory conditions to demonstrate some vital prebiotic precursors formation. The reaction pathways from starting molecules to amino acids were modelled at SCS-MP2/cc-pVDZ/SMD level of the theory. The calculated energetic characteristics facilitate the determination of the plausible reaction pathways for amino acids - glycine, serine and alanine, along with sulfur-containing ones - cysteine and homocysteine under hydrothermal scenario.</p>","PeriodicalId":7122,"journal":{"name":"Acta Chimica Slovenica","volume":"72 1","pages":"205-216"},"PeriodicalIF":1.2,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143662091","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Analytical Validation and Greenness Assessment of HPLC-DAD Method for Methylxanthines Analysis.
IF 1.2 4区 化学
Acta Chimica Slovenica Pub Date : 2025-03-03 DOI: 10.17344/acsi.2024.8971
Omar J Portillo-Castillo, Paola Cobos-Cervantes, Norma C Cavazos-Rocha, Rocío Álvarez-Román, Luis Alejandro Pérez-López, Cecilia Delgado-Montemayor, Graciela Granados-Guzmán
{"title":"Analytical Validation and Greenness Assessment of HPLC-DAD Method for Methylxanthines Analysis.","authors":"Omar J Portillo-Castillo, Paola Cobos-Cervantes, Norma C Cavazos-Rocha, Rocío Álvarez-Román, Luis Alejandro Pérez-López, Cecilia Delgado-Montemayor, Graciela Granados-Guzmán","doi":"10.17344/acsi.2024.8971","DOIUrl":"10.17344/acsi.2024.8971","url":null,"abstract":"<p><p>In this study, a simple, and eco-friendly high-performance liquid chromatography-diode array detection (HPLC-DAD) method was developed and validated for analyzing methylxanthines, including theobromine (TB), theophylline (TF), and caffeine (CF). This method demonstrated excellent performance using a mobile phase of water and ethanol in a core-shell Kinetex® C18 column. The method was linear (1-100 µg mL-1), exhibiting high precision and accuracy with relative standard deviations below 2.67% and recoveries ranging from 98.17% to 108.23%. The detection and quantification limits ranged from 0.19-0.26 µg mL-1 and 0.64-0.87 µg mL-1, respectively. We applied this method to analyze powdered lemon-flavored beverages enriched with black or green tea extracts. CF was detected exceeding 1.62 g kg-1. The proposed method showed excellent greenness, evidenced by the Analytical Eco-Scale, Analytical GREEnness metric (AGREE) calculator, and ComplexGAPI.</p>","PeriodicalId":7122,"journal":{"name":"Acta Chimica Slovenica","volume":"72 1","pages":"180-194"},"PeriodicalIF":1.2,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143662015","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Upcycling of plastic waste into multi-walled carbon nanotubes as efficient organic dye adsorbent.
IF 1.2 4区 化学
Acta Chimica Slovenica Pub Date : 2025-03-03 DOI: 10.17344/acsi.2025.9145
Gordana Bogoeva-Gaceva, Meri Sokolovska, Viktor Stefov, Metodija Najdoski, Sebastijan Kovačič
{"title":"Upcycling of plastic waste into multi-walled carbon nanotubes as efficient organic dye adsorbent.","authors":"Gordana Bogoeva-Gaceva, Meri Sokolovska, Viktor Stefov, Metodija Najdoski, Sebastijan Kovačič","doi":"10.17344/acsi.2025.9145","DOIUrl":"https://doi.org/10.17344/acsi.2025.9145","url":null,"abstract":"<p><p>Multi-walled CNTs with an average diameter of about 80 nm, a length of several micrometers and surface area (SBET) of 100 m2 g-1 were obtained by pyrolysis of low-density polyethylene waste. The potential of the resulting MWCNTs material to purify water containing organic dyes was tested with Bezaktiv Blau HE-RM (BB) and Bezaktiv Rot S-3B (BR) reactive dyes. 200 mg L-1 MWCNT material was used to follow the adsorption of 30 mg L-1, 40 mg L-1, 50 mg L-1 and 60 mg L-1 BB and BR at pH 3 and a temperature of ~25 oC. The results have shown that this material has a high potential as a sorbent, and its adsorption capacity of 257 mg g-1 (for Bezaktiv Blau HE-RM) and 213 mg g-1 (for Bezaktiv Rot) is close to some commercial MWCNTs and functionalized MWCNT-based adsorbents. The adsorption process was very fast, reaching 80-90 % of the dye removal in 10-15 minutes, and the equilibrium time was reached in 40-60 minutes. The adsorption isotherm showed that the Langmuir model was more suitable than the Freundlich model for describing the adsorption properties of the pollutants.</p>","PeriodicalId":7122,"journal":{"name":"Acta Chimica Slovenica","volume":"72 1","pages":"154-163"},"PeriodicalIF":1.2,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143661848","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Structures and properties of phenylethanoid glycosides from Barleria prionitis Linn.: Insights from theoretical and experimental investigations.
IF 1.2 4区 化学
Acta Chimica Slovenica Pub Date : 2025-03-01 DOI: 10.17344/acsi.2024.9018
Onesy Keomanykham, Hue Van Nguyen, Hoa Le Thi Phuong, Ha Nguyen Xuan, Bounnam Xangyaorn, Hue Minh Thi Nguyen, Quang Dang
{"title":"Structures and properties of phenylethanoid glycosides from Barleria prionitis Linn.: Insights from theoretical and experimental investigations.","authors":"Onesy Keomanykham, Hue Van Nguyen, Hoa Le Thi Phuong, Ha Nguyen Xuan, Bounnam Xangyaorn, Hue Minh Thi Nguyen, Quang Dang","doi":"10.17344/acsi.2024.9018","DOIUrl":"10.17344/acsi.2024.9018","url":null,"abstract":"<p><p>From the whole plant of Barleria prionitis Linn. collected in Laos, six phenylethanoid glycosides, acetylmartynoside A (1), martynoside (2), 3-O-methylpoliumoside (3), isoaceteoside (4), leucosceptoside A (5), 2-(3-hydroxy-4-methoxyphenyl)-ethyl-O-(α-l-rhamnosyl)-(1-3)-O-(α-l-rhamnos-yl)-(1-6)-4-O-E-feruloyl-β-d-glucopyranoside (6) were isolated. Their structures were elucidated by 1D and 2D NMR and mass spectra. In addition, the antioxidant activity of compounds 1-6 was investigated. All of the compounds showed Keap1 protein inhibitory effect with binding affinity in the range of -9.639 - -9.084 kcal/mol and moderate DPPH free radical scavenging activity with their IC50 values in the range of 110-389 μM. Furthermore, the predicted toxicity results of all of them indicated a level of 5 and a high LD50 value (LD50 = 5000 mg/kg), which showed low toxicity and high safety for oral consumption in humans.</p>","PeriodicalId":7122,"journal":{"name":"Acta Chimica Slovenica","volume":"72 1","pages":"195-204"},"PeriodicalIF":1.2,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143661564","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Synthesis and Characterization of Tetraarylphenazine and Tetraaryldibenzo[b,i]phenazine.
IF 1.2 4区 化学
Acta Chimica Slovenica Pub Date : 2025-03-01 DOI: 10.17344/acsi.2025.9186
Liang-Hong Hu, Qian Cai Liu
{"title":"Synthesis and Characterization of Tetraarylphenazine and Tetraaryldibenzo[b,i]phenazine.","authors":"Liang-Hong Hu, Qian Cai Liu","doi":"10.17344/acsi.2025.9186","DOIUrl":"https://doi.org/10.17344/acsi.2025.9186","url":null,"abstract":"<p><p>Phenazine and 6,13-diazapentacene are nitrogen-containing linear heterocycles that have attracted significant attention in the fields of organic electronics, and materials science. A straightforward strategy has been developed to construct 1,4,6,9-tetraarylphenazines and 5,7,12,14-tetraaryl-6,13-diazapentacenes with 1,4,6,9-tetrabromophenazine and 5,6,12,14-tetrabromo-6,13-dihydrodibenzo[b,i]phenazine as the key intermdiates, which were obtained easily from the bromination of phenazine and 6,13-dihydrodibenzo[b,i]phenazine, respectively. While the Pd-132 catalyzed ligand-free Suzuki couplings between above ascribed intermediates and various arylboronic acids were performed to afford directly tetraarylphenazines or tetraaryl-6,13-diazapentacenes by sequent oxidations. All of the new compounds are fully characterized by spectroscopy.</p>","PeriodicalId":7122,"journal":{"name":"Acta Chimica Slovenica","volume":"72 1","pages":"171-179"},"PeriodicalIF":1.2,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143661738","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Synthesis, Crystal Structures and Catalytic Oxidation Property of Two Copper(II) Complexes Derived from 5-Bromo-2-((2-piperazin-1-ylethylimino)methyl)phenol.
IF 1.2 4区 化学
Acta Chimica Slovenica Pub Date : 2025-03-01 DOI: 10.17344/acsi.2025.9182
Ya Liu, Qiwen Yang, Shuang Wang, Runhan Liu, Haodong Yu, Wenhong Xu, Yuwei Ning
{"title":"Synthesis, Crystal Structures and Catalytic Oxidation Property of Two Copper(II) Complexes Derived from 5-Bromo-2-((2-piperazin-1-ylethylimino)methyl)phenol.","authors":"Ya Liu, Qiwen Yang, Shuang Wang, Runhan Liu, Haodong Yu, Wenhong Xu, Yuwei Ning","doi":"10.17344/acsi.2025.9182","DOIUrl":"https://doi.org/10.17344/acsi.2025.9182","url":null,"abstract":"<p><p>Two new copper(II) complexes, [Cu(HL)(ONO2)]NO3 (1) and [CuCl(HL)]Cl∙H2O (2), where HL is the zwitterionic form of the Schiff base 5-bromo-2-((2-piperazin-1-ylethylimino)methyl)phenol (HL), have been prepared. The Schiff base and two complexes were characterized by IR and UV-Vis spectroscopy. In addition, the free Schiff base was characterized by 1H NMR spectroscopy. Structures of the complexes were further confirmed by single crystal X-ray diffraction. The Cu atoms in the complexes are in square planar coordination. Crystal structures of both copper complexes are stabilized by hydrogen bonds. The complexes have high catalytic activity for the epoxidation of styrene, with conversions and selectivity over 90%.</p>","PeriodicalId":7122,"journal":{"name":"Acta Chimica Slovenica","volume":"72 1","pages":"164-170"},"PeriodicalIF":1.2,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143661822","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Developing Chemical Literacy in Non-Formal Learning Environments: A Systematic Literature Review.
IF 1.2 4区 化学
Acta Chimica Slovenica Pub Date : 2025-02-28 DOI: 10.17344/acsi.2024.9108
Alenka Dražić, Iztok Devetak
{"title":"Developing Chemical Literacy in Non-Formal Learning Environments: A Systematic Literature Review.","authors":"Alenka Dražić, Iztok Devetak","doi":"10.17344/acsi.2024.9108","DOIUrl":"10.17344/acsi.2024.9108","url":null,"abstract":"<p><p>The study examines the development of chemical literacy in non-formal learning environments based on a systematic literature review conducted between 2010 and 2023. Non-formal education serves as a valuable complement to the formal school system, enabling the exploration of topics often overlooked in formal curricula due to rigid regulations or teachers' lack of expertise. The review included 236 primary articles, of which 19 met strict inclusion criteria. The results indicate that the most employed approaches in non-formal education are inquiry-based learning, laboratory work with an emphasis on independent experimental activities, and science camps. Non-formal education significantly contributes to the development of chemical literacy, fosters interest in science, and improves attitudes toward chemistry. The authors highlight the need for further research in this field and greater integration of non-formal approaches into formal education to enhance the scientific literacy of young learners.</p>","PeriodicalId":7122,"journal":{"name":"Acta Chimica Slovenica","volume":"72 1","pages":"145-153"},"PeriodicalIF":1.2,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143662050","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Manganese, cobalt, nickel and zinc complexes with pyrazine-2-carboxylic acid.
IF 1.2 4区 化学
Acta Chimica Slovenica Pub Date : 2025-02-21 DOI: 10.17344/acsi.2024.9095
Saša Petriček
{"title":"Manganese, cobalt, nickel and zinc complexes with pyrazine-2-carboxylic acid.","authors":"Saša Petriček","doi":"10.17344/acsi.2024.9095","DOIUrl":"https://doi.org/10.17344/acsi.2024.9095","url":null,"abstract":"<p><p>New complexes of zinc (1), manganese(II) (2 and 2a), cobalt(II) (3) and nickel(II) chloride (4), with pyzaH (pyrazine-2-carboxylic acid) were synthesized. The pyzaH molecules are coordinated as monodentate ligands only through heterocyclic nitrogen in 1, 2 and 3, as shown by single crystal X-ray diffraction analysis. The chloride ions are coordinated as terminal ligands in 1, [ZnCl2(pyzaH)2]×2H2O, but act as bridging ligands in the 1D complexes [MCl2(pyzaH)2]n×2nH2O (M = Mn, 2, Co, 3). The supramolecular architectures of the complexes differ due to the coordination of the chlorides, the hydrogen bonds and the parallel stacking arrangements of the pyzaH molecules. In contrast to the isolated crystals of 1, 2 and 3, the manganese(II) (2a) and nickel(II) (4), compounds do not contain water.  According to the IR spectra and the results of thermal analyzes, the proposed formula is [MCl2(pyzaH)2]. Powder X-ray and thermal analysis results demonstrate the isostructural nature of complexes 2a and 4. The low thermal stability of 1 is due to the monodentate coordination of pyzaH in 1. Thermal decomposition of 1, 2a and 4 in air produces oxides MO (M = Mn, Ni, Zn).</p>","PeriodicalId":7122,"journal":{"name":"Acta Chimica Slovenica","volume":"72 1","pages":"133-144"},"PeriodicalIF":1.2,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143662094","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Synthesis and Antibacterial Activity of Vanillic Acid Derivatives Containing Indole Structure.
IF 1.2 4区 化学
Acta Chimica Slovenica Pub Date : 2025-02-11 DOI: 10.17344/acsi.2024.9106
Jianlong Zhang, Qiang Liu, JiLiang Hu, ZhongQiang Zhang, QingMei Zhou, JiaBao Luan, Yue Wang, WeiWei Liu
{"title":"Synthesis and Antibacterial Activity of Vanillic Acid Derivatives Containing Indole Structure.","authors":"Jianlong Zhang, Qiang Liu, JiLiang Hu, ZhongQiang Zhang, QingMei Zhou, JiaBao Luan, Yue Wang, WeiWei Liu","doi":"10.17344/acsi.2024.9106","DOIUrl":"10.17344/acsi.2024.9106","url":null,"abstract":"<p><p>Using indole-2-carboxylic acid and vanillic acid as raw materials, a series of 11 novel compounds (7a-7k) were synthesized by chemically linking indole-2-carboxylic acid and vanillic acid through an aminothioureido group. The antibacterial activity of these compounds against Vibrio harveyi and Vibrio parahaemolyticus was evaluated using the agar perforating method.  The results indicated that compounds 7g-7j exhibited superior antibacterial activity against both strains compared to the positive control, with 7g showing the best performance. Structure-activity relationship analysis suggested that alkylation of the nitrogen atom in the indole ring could enhance the antibacterial effect, and shorter carbon chains were associated with better antibacterial activity.</p>","PeriodicalId":7122,"journal":{"name":"Acta Chimica Slovenica","volume":"72 1","pages":"127-132"},"PeriodicalIF":1.2,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143661736","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
High-pressure ultrasonic-assisted extraction of cannabinoids from industrial hemp leaves: Structure analysis and antioxidant activity.
IF 1.2 4区 化学
Acta Chimica Slovenica Pub Date : 2025-02-07 DOI: 10.17344/acsi.2024.8822
Hang Li, Tian-Xiao Yang, Qingsheng Zhao, Yuan Zhu, Bing Zhao
{"title":"High-pressure ultrasonic-assisted extraction of cannabinoids from industrial hemp leaves: Structure analysis and antioxidant activity.","authors":"Hang Li, Tian-Xiao Yang, Qingsheng Zhao, Yuan Zhu, Bing Zhao","doi":"10.17344/acsi.2024.8822","DOIUrl":"10.17344/acsi.2024.8822","url":null,"abstract":"<p><p>Cannabinoids are very valuable natural products of industrial hemp. In this work, the high-pressure ultrasonic-assisted extraction (HUE) technique was employed for the first time to extract cannabinoids from industrial hemp leaves. A maximum extraction yield (60.02 ± 0.09 mg/g) was obtained through the single-factor experiments, which was much higher compared to ultrasonic-assisted extraction (UE, 42.88 ± 0.02 mg/g) and stirring extraction (SE, 35.35 ± 0.07 mg/g). The optimized HUE conditions were: extraction time was 40 min, EtOH concentration was 60%, extraction temperature was 60℃, ultrasonic power was 400 W, RL/S was 20 mL/g, stirring rate was 400 rpm, and extraction pressure was 0.6 MPa. The total phenolic content (TPC, 244.36 ± 0.84 mg GAE/g extract) and the total flavonoids content (TFC, 0.27 ± 0.02 mg RE/g extract) of the HUE extract were also the highest. The HUE mechanism was revealed to some extent by several characterizations including surface morphology that HUE could deeply destroy the structure of leave particles. Furthermore, the in vitro antioxidant activity of HUE extract was the best among the three extracts. The EC50 values against DPPH and ABTS were 0.28 mg/mL and 0.25 mg/mL, respectively. In summary, this work confirmed that HUE was a suitable method for extracting cannabinoids and the obtained extract with a high content of cannabinoids had great application values.</p>","PeriodicalId":7122,"journal":{"name":"Acta Chimica Slovenica","volume":"72 1","pages":"34-44"},"PeriodicalIF":1.2,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143662088","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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