Chi Weigela, thuộc họ Kim ngân (Caprifoliaceae) được sử dụng rộng rãi trong y học cổ truyền tại các nước châu Á. Các hợp chất saponin phân lập từ chi Weigela có nhiều hoạt tính sinh mạnh như kháng oxy hóa, viêm và ung thư. Nghiên cứu đã tạo cao chiết ethanol loài florida “Jean’s Gold” bằng phương pháp xuất hỗ trợ vi sóng. Hai tách dựa trên sắc ký hiện đại. Cấu trúc hóa của này xác định là olean...

The Widom–Rowlinson model (or the Area-interaction model) is a Gibbs point process in Rd with formal Hamiltonian defined as volume of ∪x∈ωB1(x), where ω locally finite configuration points and B1(x) denotes unit closed ball centred at x. also tuned by two other parameters: activity z>0 related to intensity inverse temperature β≥0 strength interaction. In present paper we investigate phase trans...

Two new spirostane glycosides, named polygokingiaside A (1) and B (2), 6 known (25 R)-26- O-( β-d-glucopyranosyl)-furost-5-en-3 β,22 α,26-triol 3- O-β-d-glucopyranosyl-(1→4)- β-d-galactopyranoside (3), S)-26- O-β-d-glucopyranosyl-(1→2)- β-d-glucopyranosyl-(1→4)- (4), (5), (23 S,25 R)-spirostan-5-en-3 β,23-dihydroxy-12-one-3- (6), (24 β,24-dihydroxy-12-one-3- (7), β-hydroxy-12-one-3- (8), were i...

In the present paper, we report crystal structures of four types ([A(1)H][A(2)H]Y, [A(1)H]3[A(2)H]Y2, A(1)H[A(2)H···A(2)]Y, and A(1)H[A(1)H···A(2)]Y) mixed salts containing sulfate anion (Y = SO42−) amino acids A, i.e., sarcosine (Sar), dimethylglycine (DMG), betaine (Bet), β-alanine (β-Ala), l-proline (l-Pro): (β-AlaH)(DMGH)SO4·2H2O (I), (β-AlaH)(BetH)SO4 (II), (β-AlaH)(l-ProH)SO4 (III), (BetH...

background: extended spectrum β-lactamases (esbls) and ampc β-lactamases enzyme are major sources of resistance to β-lactam antibiotics especially in enterobacteriaceae such as escherichia coli and klebsiella pneumoniae. increasing frequency of the co-existence of esbls with ampc-β-lactamases in bacteria is a serious threat for treating bacterial infections. conclusions: outbreak of isolates co...

During recent years, there was growing demand in using microalga valuable products such as β-carotene in health care. β-Carotene has anti-cancer and anti-aging properties for human. In Dunaliella salina cells, β-carotene has a major protecting role for biomolecules, when the production of reactive oxygen species elevated. In the present study, we investigated the influence of the four most effe...