VNU Journal of Science: Natural Sciences and Technology最新文献_第3页

Selective Transformation of Isoeugenol to Licarin A using HKUST-1 Catalyst 利用 HKUST-1 催化剂将异丁香酚选择性转化为利卡灵 A

VNU Journal of Science: Natural Sciences and Technology Pub Date : 2023-11-22 DOI: 10.25073/2588-1140/vnunst.5613

Do Van Dang, Nguyen Kim Oanh, Dang Van Long, Le Thanh Son

引用次数: 0

Cytotoxic and Antimicrobial Secondary Metabolites from Penicillium hetheringtonii IMBC-NMTP04 hetheringtonii青霉IMBC-NMTP04的细胞毒性和抗菌次级代谢物

VNU Journal of Science: Natural Sciences and Technology Pub Date : 2023-09-07 DOI: 10.25073/2588-1140/vnunst.5439

T. Quang, Le Ngoc Anh, N. Ngoc, L. Vien, Do Hoang Anh, Nguyen Thi Huong, T. H. Hanh, N. X. Cuong, N. Ngan, Nguyen Quang Trung, N. H. Nam

{"title":"Cytotoxic and Antimicrobial Secondary Metabolites from Penicillium hetheringtonii IMBC-NMTP04","authors":"T. Quang, Le Ngoc Anh, N. Ngoc, L. Vien, Do Hoang Anh, Nguyen Thi Huong, T. H. Hanh, N. X. Cuong, N. Ngan, Nguyen Quang Trung, N. H. Nam","doi":"10.25073/2588-1140/vnunst.5439","DOIUrl":"https://doi.org/10.25073/2588-1140/vnunst.5439","url":null,"abstract":"Chemical investigation of the sesame-associated fungal strain Penicillium hetheringtonii IMBC-NMTP04 resulted in isolation of five compounds, penicitrinone A (1), dihydrocitrinin (2), janthinone (3), coniochaetone B (4), and 9-oxo-10(E),12(E)-octadecadienoic acid (5). Their chemical structures were elucidated by spectroscopic methods, including 1D and 2D NMR and mass spectra in comparison with the literature data. Compound 1 showed modest cytotoxicity toward LNCaP, HepG2, MCF-7, KB, SK-Mel-2, and HL-60 human cancer cell lines, with IC50 values ranging from 60.1 to 84.2 mM while 5 was cytotoxic toward only HL-60 cell line (IC50 = 71.6 mM). All the compounds significantly inhibited E. faecalis, S. enterica, and C. albicans growth, with MIC values ranging from 12.5 to 50.0 mM. Compounds 2, 4, and 5 suppressed the growth of B. cereus, while both 1 and 2 showed antimicrobial effect against E. coli, with the same MIC value of 200 mM. This is the first time to report the chemical constituents of Penicillium hetheringtonii and the antimicrobial effect of 2–4.","PeriodicalId":23524,"journal":{"name":"VNU Journal of Science: Natural Sciences and Technology","volume":"42 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78436765","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Zinc Ions Implantation on the Surface of Commercial Papers for Antibacterial and Antifungal Applications 商业纸表面锌离子注入的抗菌和抗真菌应用

VNU Journal of Science: Natural Sciences and Technology Pub Date : 2023-09-05 DOI: 10.25073/2588-1140/vnunst.5545

Hanh Mai, Khai Quang Dao, Hieu Chi Hoang, Tam Trong Nguyen, Duong Hoang Nguyen

引用次数: 0

Synthesis of Nd - Glutamate complex for Paris polyphylla Smith stimulant application Nd -谷氨酸配合物的合成及其在多叶植物刺激中的应用

VNU Journal of Science: Natural Sciences and Technology Pub Date : 2023-09-05 DOI: 10.25073/2588-1140/vnunst.5549

Do Minh The

引用次数: 0

Synthesis of CeO2 -Pr2O3 Composites Applying for the Growth of Paramignya trimera 应用于三聚氰胺生长的CeO2 -Pr2O3复合材料的合成

VNU Journal of Science: Natural Sciences and Technology Pub Date : 2023-09-03 DOI: 10.25073/2588-1140/vnunst.5550

Tran Thi Thu Hien, Nguyen Thi Thu Ha, Do Minh The, Phan Phuoc Minh Hiep, Pham Thi Thanh Tam, Dang Thi Ngoc Ha, Nguyen Thi Kim Chi, P. Thạch, Mai Hung Thanh Tung, Nguyen Thi Phuong Le Chi, Tran Thi Thu Phuong, Nguyễn Trí Quốc

引用次数: 0

Sequencing Analysis of COI Genes Isolated from Vietnam’s Endemic Insect Species (Insecta: Plecoptera) for DNA Barcoding Database 越南特有昆虫COI基因序列分析(昆虫亚目:翅翅目

VNU Journal of Science: Natural Sciences and Technology Pub Date : 2023-08-30 DOI: 10.25073/2588-1140/vnunst.5513

N. Q. Huy, N. T. Huyen, Ha Thi Lan Anh, N. T. Uyen, Le Duc Viet, Dang Thi Lan Anh, Ho Thi Yen, T. Duc, Nguyen Van Vinh, C. T. Thu, Nguyen Van Sang

{"title":"Sequencing Analysis of COI Genes Isolated from Vietnam’s Endemic Insect Species (Insecta: Plecoptera) for DNA Barcoding Database","authors":"N. Q. Huy, N. T. Huyen, Ha Thi Lan Anh, N. T. Uyen, Le Duc Viet, Dang Thi Lan Anh, Ho Thi Yen, T. Duc, Nguyen Van Vinh, C. T. Thu, Nguyen Van Sang","doi":"10.25073/2588-1140/vnunst.5513","DOIUrl":"https://doi.org/10.25073/2588-1140/vnunst.5513","url":null,"abstract":"The Insecta are the most diverse group of animals on the planet. The diversity of Plecoptera aquatic insect order is used as an environmental and ecological indicator. The study of endemic species is important for confirming the national biodiversity and contributing to the determination of national sovereignty. Despite Vietnam being a biodiversity hotspot, the number of known insect species remains limited. As a result, DNA barcoding has been used as a cutting-edge technique to efficiently and rapidly classify biological species. The Cytochrome c oxidase subunit I (COI) gene is widely regarded as a standard barcode for animal classification. In this study, we amplified and sequenced a portion of the COI gene fragment with a molecular weight of 710 bp for eight insect species belonging to the order Plecoptera, endemic to Vietnam. When compared to the previously published sequences of other Plecoptera species, the results of COI gene sequence analysis showed a high divergence of at least 9.9%. Molecular analysis of the studied species accurately demonstrated their endemism and morphological similarities. This study contributes to the development of a DNA barcoding database for endemic insects in Vietnam.","PeriodicalId":23524,"journal":{"name":"VNU Journal of Science: Natural Sciences and Technology","volume":"18 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73705403","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of nanoclay on the fire resistance properties of epoxy-based intumescent retardant coatings for steel plate 纳米粘土对环氧基膨胀型钢板阻燃涂料耐火性能的影响

VNU Journal of Science: Natural Sciences and Technology Pub Date : 2023-08-30 DOI: 10.25073/2588-1140/vnunst.5553

Trung Do Dang

引用次数: 0

Microwave-Assisted, Ionic Liquid-Catalyzed Synthesis of 1,2-Disubstituted Benzimidazoles under Solvent-Free Conditions 微波辅助离子液体催化无溶剂条件下1,2-二取代苯并咪唑的合成

VNU Journal of Science: Natural Sciences and Technology Pub Date : 2023-07-11 DOI: 10.25073/2588-1140/vnunst.5407

D. Duc, L. Giang

引用次数: 0

Effects of Calcination Temperature on Photocatalytic Activity of WO3 Materials for Tetracycline Degradation in Aqueous Environment under Visible Light 可见光下煅烧温度对WO3材料光催化降解四环素活性的影响

VNU Journal of Science: Natural Sciences and Technology Pub Date : 2023-07-04 DOI: 10.25073/2588-1140/vnunst.5542

N. T. Huong, Nguyen Viet Khoa, Nguyen Thi Hanh, Hoang Thu Trang, Dang Quang Truong, Nguyen Chi Cuong, Nguyen Phuong Hoang Anh, Ngo Truc Quynh, Bui Thi Phuong Thao, Nguyen Thi Thu Hoai, Pham Thanh Dong

{"title":"Effects of Calcination Temperature on Photocatalytic Activity of WO3 Materials for Tetracycline Degradation in Aqueous Environment under Visible Light","authors":"N. T. Huong, Nguyen Viet Khoa, Nguyen Thi Hanh, Hoang Thu Trang, Dang Quang Truong, Nguyen Chi Cuong, Nguyen Phuong Hoang Anh, Ngo Truc Quynh, Bui Thi Phuong Thao, Nguyen Thi Thu Hoai, Pham Thanh Dong","doi":"10.25073/2588-1140/vnunst.5542","DOIUrl":"https://doi.org/10.25073/2588-1140/vnunst.5542","url":null,"abstract":"In the research, we successfully investigated effects of calcination temperature on the characteristics and photocatalytic activities of WO3 applying for degradation of antibiotics in aqueous environment under visible light. The crystal phases and optical properties of the synthesized WO3 nanoparticles were determined by an X-ray diffractometer (XRD), an UV-VIS diffuse reflectance spectroscopy (UV-VIS) and a photoluminescence spectroscopy (PL). The photocatalytic activities of the WO3 materials, which were calcinated at different temperatures, were studied via degradation of Tetracycline under visible light. Obtained results indicated that the orthorhombic phase was converted completely to monoclinic phase when the sample was calcinated at 500 oC. As compared to these WO3-300, WO3-400 and WO3-600 samples, the WO3-500 sample, which was calcinated at 500 oC, showed significant decrease in band gap energy and electron-hole recombination rate. Thus, the WO3-500 exhibited novel photocatalytic activity for Tetracycline degradation under visible light.","PeriodicalId":23524,"journal":{"name":"VNU Journal of Science: Natural Sciences and Technology","volume":"218 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75608446","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Characterization of Adipose‐derived Stem Cells from Breast Cancer Cell Transplanted Mice 乳腺癌细胞移植小鼠脂肪来源干细胞的表征

VNU Journal of Science: Natural Sciences and Technology Pub Date : 2023-07-03 DOI: 10.25073/2588-1140/vnunst.5330

T. T. Giang, N. Anh, N. Hiep, N. Nhung, Bui Van Ngoc, N. Hanh

{"title":"Characterization of Adipose‐derived Stem Cells from Breast Cancer Cell Transplanted Mice","authors":"T. T. Giang, N. Anh, N. Hiep, N. Nhung, Bui Van Ngoc, N. Hanh","doi":"10.25073/2588-1140/vnunst.5330","DOIUrl":"https://doi.org/10.25073/2588-1140/vnunst.5330","url":null,"abstract":"Mesenchymal stem cells (MCSs) from adipose tissue are reported to have a pronounced impact on tumor growth or suppression. However, so far, how the cancer cells affect the stem cells in vivo conditions has not been clarified. In this study, we evaluated the impact of breast cancer cells on the characteristics of adipose-derived stem cells (ADSCs) under in vivo conditions. ADSCs were obtained from Balb/c mice in three consecutive weeks after transplantation with 1×106 MCF7 cells. The results showed that the amount of ADSCs per one gram fat reduced over time, but that reduction was not significantly different. In fact, isolated ADSCs presenting specific MSC surface markers increased at the second passage, compared to the time of isolation. Particularly, they were highly positive for CD90 (a MSC indicator) and negative for CD45 (a hematopoietic marker). Moreover, in in vitro culture, ADSCs were successfully differentiated into adipocytes, which were detected by Oil Red O staining. This present experiment gives initial assessments of ADSC characteristics; however, further investigations are necessary to fully evaluate the differences in stem cell potency and immunophenotype caused by cancer cell transplantation.","PeriodicalId":23524,"journal":{"name":"VNU Journal of Science: Natural Sciences and Technology","volume":"17 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87790005","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0