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Α-Glucosidase inhibitors from the bark of Mangifera mekongensis
Abstract Background: Mangifera mekongensis (Anacardiaceae) is cultivated for its edible fruit and has been used in traditional Vietnamese medicine for its anti-aging properties and for treating diabetes, vermifuge, and dysentery. As part of a search for biologically active compounds with reduction of the rate of glucose absorption, a screening h...
6 trang | Chia sẻ: thanhle95 | Ngày: 08/07/2021 | Lượt xem: 642 | Lượt tải: 0
Tyrosinase inhibitory activity of flavonoids from Artocarpus heterophyllous
Abstract Background: Tyrosinase is an oxidoreductase that is very important in medicine and cosmetics because the excessive production of melanin causes hyperpigmentation. The development of novel, effective tyrosinase inhibitors has long been pursued. In preliminary tests, we found that an extract of the wood of Artocarpus heterophyllous (AH) p...
6 trang | Chia sẻ: thanhle95 | Ngày: 08/07/2021 | Lượt xem: 538 | Lượt tải: 0
Synthesis and antibacterial and antifungal activities of N-(tetra-O-acet yl-β-d-glucopyranosyl)thiosemicarbazones of substituted 4-formylsydnones
Abstract Background: Sydnone is a heterocycle that exhibits remarkable pharmacological activities, including antimicrobial, anti-inflammatory, analgesic, antipyretic and antioxidant activities. Thiosemicarbazones are of compounds that contain the –NHCSNHN=C< linkage group and are considerable interest because they exhibit important chemical prop...
14 trang | Chia sẻ: thanhle95 | Ngày: 08/07/2021 | Lượt xem: 541 | Lượt tải: 0
Responses of green algae and diatom upon exposure to chromium and cadmium
Abstract: In this study, the detrimental effects of trace metals on the growth of phytoplankton and the phytoremediation potential of microalgae from Vietnam are elucidated. Two green algae Scenedesmus accuminatus var biseratus and Scenedesmus protuberans, along with the diatom species Cyclotella sp., were exposed to chromium (Cr) and cadmiu...
5 trang | Chia sẻ: thanhle95 | Ngày: 08/07/2021 | Lượt xem: 501 | Lượt tải: 0
Các nhân tố ảnh hưởng đến quyết định mua nhà ở xã hội của người dân địa bàn tỉnh Vĩnh Long
Abstract The research model is proposed by the author with six factors: Location, Financial Situation, Architecture, Legal, Habitat and Social Influence affecting people's decision to buy social housing in the province of Vĩnh Long. By surveying 347 inhabitants in the province of Vinh Long bought apartments in the housing residential quarters, and...
9 trang | Chia sẻ: thanhle95 | Ngày: 08/07/2021 | Lượt xem: 846 | Lượt tải: 1
Purification of phosphogypsum for use as cement retarder by sulphuric acid treatment
Abstract. Phosphogypsum is a by-product of the wet phosphoric acid production. In this study, chemical compositions of phosphogypsum waste (PG) in Hai Phong diammonium phosphate plant (DAP1) and Lao Cai diammonium phosphate plant (DAP2) in Viet Nam were surveyed for the purpose of gypsum recovery by P2O5, F removal to meet TCVN11833 for use tre...
10 trang | Chia sẻ: thanhle95 | Ngày: 08/07/2021 | Lượt xem: 517 | Lượt tải: 0
Prevalence of classical Staphylococcal enterotoxin genes of Staphylococcus aureus isolated from ready-to-eat food in Ho Chi Minh City, Vietnam
Abstract Contamination of Staphylococcus aureus in ready-to-eat (RTE) food is a leading cause of foodborne illness in Vietnam. The aim of this study was to analyze the frequency of classical Staphylococcal enterotoxin genes (sea, seb, sec, sed, and see genes) in S. aureus strains isolated from ready-to-eat food in Ho Chi Minh, Vietnam (76 strai...
5 trang | Chia sẻ: thanhle95 | Ngày: 08/07/2021 | Lượt xem: 523 | Lượt tải: 0
Preparation of heterogeneous Fenton-type nano catalysts and their application to methylene blue degradation
ABSTRACT Introduction: Iron-based nanocatalysts are known as a new generation heterogeneous Fenton catalyst, replacing the traditional Fenton catalyst system which has many disadvantages in experimental processes and industrial applications. In this study, we focused on the preparation of iron nanoparticles and their use when embedded in traditi...
7 trang | Chia sẻ: thanhle95 | Ngày: 08/07/2021 | Lượt xem: 647 | Lượt tải: 0
Polyhydroxypregnane glycosides from Dregea volubilis
Abstract. Four known polyhydroxypregnane glycosides, dregeoside Da1 (1), volubiloside A (2), drevoluoside N (3), and volubiloside C (4) were isolated from the methanol extract of the leaves of Dregea volubilis (L.f.) Benth. ex Hook. f. Their structures were elucidated by 1D-, 2D-NMR, spectra and compared with those reported in the literature. At...
8 trang | Chia sẻ: thanhle95 | Ngày: 08/07/2021 | Lượt xem: 499 | Lượt tải: 0
Phương pháp điện di mao quản sử dụng detector độ dẫn không tiếp xúc (CE-C4D) và một số ứng dụng trong phân tích thực phẩm
BÀI báo giới thiệu về phương pháp điện di mao quản sử dụng detector độ dẫn không tiếp xúc và một số ứng dụng đã được nghiên cứu, phát triển trong phân tích thực phẩm ở Việt Nam. Các nhóm chất áp dụng bao gồm: oxalat, một số chất tạo ngọt (acesulfam kali, aspartam, cyclamat, saccharin) và bảo quản thực phẩm (acid citric, benzoic, sorbic). Nghiên cứ...
8 trang | Chia sẻ: thanhle95 | Ngày: 08/07/2021 | Lượt xem: 579 | Lượt tải: 0