Results 1 to 10 of about 1,918 (162)

Response surface methodology-optimized extraction of flavonoids from pomelo peels and isolation of naringin with antioxidant activities by Sephadex LH20 gel chromatography [PDF]

Current Research in Food Science, 2023
In this study, flavonoids were extracted from pomelo peels and naringin was isolated from the flavonoid extract. The effects of extraction parameters, namely, ethanol concentration, solid-to-liquid ratio, and extraction time, on the yield of flavonoids ...
Yuchen Shangguan, Jing Ni, Lili Jiang, Yang Hu, Chuanbo He, Ying Ma, Guohong Wu, Hejian Xiong   +7 more
doaj   +4 more sources

Neolignan Kadsurenin F Modulates Proteostatic Pathways and Possesses Potent Anti-Inflammatory Properties. [PDF]

Chem Biodivers
Abstract Kadsurenin F, a natural neolignan‐type compound, has been described as a constituent of various members of the Lauraceae family such as Aniba spp. or Nectandra spp., but can also be found in various Piper species such as Piper kadsura Ohwi (Piperaceae).
Evangelakou Z, Schwaiger S, Gianniou DD, Trougakos IP, Stuppner H.   +4 more
europepmc   +2 more sources

Dual Biological Potential: Anticancer and Antibacterial Activities of Bis-α, ω-Bifunctional Sphingolipids from the Marine Sponge Oceanapia ramsayi. [PDF]

ChemMedChem
Preparative work on Oceanapia ramsayi sponge specimens collected from the northeast South African coast (A) result in the isolation of four bifunctional sphingolipids (center). Bioassays of these compounds and their derivatives (B) show antimicrobial activity against bacterial pathogens and selective cytotoxicity to breast cancer tissue culture cell ...
Keneni DA, Njanje I, Kalinski JJ, Isaacs M, Swart T, Davison C, de la Mare JA, Dorrington RA.   +7 more
europepmc   +2 more sources

Activity of Compounds from Temperate Propolis against Trypanosoma brucei and Leishmania mexicana. [PDF]

Molecules, 2021
Ethanolic extracts of samples of temperate zone propolis, four from the UK and one from Poland, were tested against three strains and displayed EC values < 20 µg/mL.
Alotaibi A, Ebiloma GU, Williams R, Alfayez IA, Natto MJ, Alenezi S, Siheri W, AlQarni M, Igoli JO, Fearnley J, De Koning HP, Watson DG.   +11 more
europepmc   +7 more sources

Study on the preparation and enzyme inhibitory activity of polyphenols from Sargassum pallidum. [PDF]

PLoS ONE
This study aimed to obtain a high yield and purity of Sargassum pallidum polyphenol extracts (SPPE) and study its enzyme activity. Fresh Sargassum pallidum seaweed was selected for optimization of ultrasound-assisted extraction (UAE) conditions and ...
Haiyun Jiang, Li Kong, Hongguang Tang, Zhenzhen Wang, Caiping Liu, Jianhui Zhang, Yuxin Chen, Jinyang Shen, Yue Zhou   +8 more
doaj   +2 more sources

Two new sphingolipids from the stem bark of Synsepalum msolo (Sapotaceae)

Biochemistry and Biophysics Reports, 2021
Synsepalum msolo commonly known as Bang Bali in Bali-Nguemba, Cameroon is used in traditional medicine against various diseases. The leaves and stem bark extracts were subjected to silica gel and Sephadex LH20 column chromatography to yield pure ...
Ache Roland Ndifor, Njinga Ngaitad Stanislaus, Chi Godloves Fru, Ferdinand Talontsi, Turibio Kuiate Tabopda, Elisabeth Zeuko'o Menkem, Ngadjui Bonaventure Tchaleu, Yeboah Samuel Owusu   +7 more
doaj   +1 more source

FRACTIONATION OF HIGH AND LOW MOLECULAR WEIGHT COMPONENTS FROM WORT AND BEER BY ADSORPTION CHROMATOGRAPHY USING THE GEL SEPHADEX LH20 [PDF]

Journal of the Institute of Brewing, 1986
Column chromatography using the hydroxypropylated dextran gel Sephadex LH20 was used to fractionate the components of brewers' wort and beer. The elution profile of beer was investigated in detail and components identified. Fractions containing high molecular weight polypeptide material, small peptide material, free proline, phenylalanine, tyrosine and
C. J. Dale, J. S. Hough, T. W. Young
openaire   +1 more source

Thành phần hóa học của cao chiết ethyl acetate từ cây ba chẽ Desmodium triangulare (Retz.) Merr

Tạp chí Khoa học Đại học Cần Thơ, 2022
Trong nghiên cứu này, thành phần hóa học của cao chiết ethyl acetate từ thân và lá cây ba chẽ đã được nghiên cứu. Mẫu nguyên liệu khô được nghiền nhỏ, sau đó chiết bằng phương pháp ngấm kiệt với methanol thu được cao chiết thô.
Mai Phương Trang, Trần Thị Hồng Nhung, Nguyễn Ngọc Hiếu, Lê Thế Tâm, Vũ Đình Hoàng, Võ Thị Kiều Anh, Lê Đăng Quang, Nghiêm Đức Trọng, Nguyễn Thị Duyên, Bùi Thị Thu Trang, Phạm Gia Vũ, Nguyễn Cường Quốc, Trần Quang Đệ   +12 more
doaj   +1 more source

Rapid Unambiguous Structure Elucidation of Streptnatamide A, a New Cyclic Peptide Isolated from A Marine‐derived Streptomyces sp

Chemistry – A European Journal, Volume 29, Issue 56, October 9, 2023., 2023
An inspiring collaboration between pharmaceutical industry and academia enabled discovery, structure elucidation, and biosynthetic pathway analysis of streptnatamide A, a new cyclic peptide isolated from secondary metabolites of a marine invertebrate‐associated Streptomyces sp.
Jia‐Xuan Yan, Qihao Wu, Mitasree Maity, Doug R. Braun, Imraan Alas, Xiao Wang, Xing Yin, Yanlong Zhu, Bailey A. Bell, Scott R. Rajski, Ying Ge, Douglas D. Richardson, Wendy Zhong, Tim S. Bugni   +13 more
wiley   +1 more source

Two‐step isolation of the two major paraconic acids of Cetraria islandica

Journal of Separation Science, Volume 46, Issue 6, March 2023., 2023
The lichen Cetraria islandica is traditionally used as a demulcent for the symptomatic treatment of irritations of the mouth and throat and associated dry cough, as well as for the treatment of temporary loss of appetite. In addition to depsides and depsidones, thalli contain paraconic acids, a group of secondary metabolites commonly found in lichens ...
Eduardo Villicaña González, Stefan Schwaiger, Hermann Stuppner   +2 more
wiley   +1 more source