Results 91 to 100 of about 2,815,679 (232)

Proton magnetic resonance in coumarins

, 1962
The high resolution proton magnetic resonance spectra of AB, ABC and ABCD systems in fourteen coumarins have been studied. Chemical shifts and spin coupling constants for the protons in various positions in the benzo-α-pyrone ring have been obtained. The
Khetrapal, C. L., Govil, G., Dharmatti, S. S., Kanekar, C. R., Virmani, Y. P.   +4 more
core   +1 more source

Recent advances and prospects for high‐efficiency blue hot exciton organic light‐emitting diodes

FlexMat, EarlyView.
Blue organic light‐emitting diodes (OLEDs) face great challenges in achieving the balance between color purity, device efficiency, and stability. Hot exciton materials offer a solution by rapidly converting non‐emissive triplet excitons into singlet ones through a high‐lying reverse intersystem crossing process.
Xiaoen Shi, Shuyuan Ge, Futong Liu, Ping Lu   +3 more
wiley   +1 more source

Simultaneous determination of five active compounds in chimonanthus nitens by double-development HPTLC and scanning densitometry

Chemistry Central Journal, 2012
Background Chimonanthus nitens (family Calycanthaceae), Shanlamei in Chinese, is an unique species in China. The extract of dried leaves of Chimonanthus nitens has anti-inflammatory, antipyretic and antitussive effects.
Zhou Bin, Tan Miao, Lu Jing-feng, Zhao Jing, Xie Ai-feng, Li Shao-ping   +5 more
doaj   +1 more source

Pumpkin and chia seeds as functional foods and their application in different food products: A review

Food Biomacromolecules, EarlyView.
Abstract Functional foods have gained increasing attention for their capacity to promote health and reduce chronic‐disease risk beyond basic nutrition. Among plant‐based functional ingredients, pumpkin (Cucurbita spp.) and chia (Salvia hispanica L.) seeds are nutrient‐dense sources of proteins, unsaturated fatty acids, dietary fiber, tocopherols ...
Fatima Urooj, Fatima Javed, Abdul Mueez Ahmad, Laiba Younas, Sadia Ansar, Sumbal Raana, Muhammad Abdullah, Rimsha Amjad, Kashaf Basharat   +8 more
wiley   +1 more source

Dual Genotoxic and Antigenotoxic Effects of 3‐Benzoylcoumarins in Mammalian Cells

Journal of Applied Toxicology, EarlyView.
ABSTRACT Coumarins are phenolic compounds widely recognized for their diverse pharmacological activities and have attracted increasing attention as potential chemopreventive agents. In the present study, four known 3‐benzoylcoumarin derivatives [(1), (2), (3), and (4)] were evaluated for their cytotoxic, mutagenic, and antigenotoxic effects in Chinese ...
Leticia Helena Parreira, Evelyn Pinheiro de Mendonça, Aléxia Polo Siqueira, Cleydson Finotti Cordeiro, Elkin José Torres Sierra, Rudy Bonfilio, Diogo Teixeira Carvalho, Pollyanna Francielli de Oliveira   +7 more
wiley   +1 more source

Síntese de análogos e isósteros da escopoletina, uma cumarina bioativa isolada da espécie vegetal Polygala Sabulosa A. W. Bennett [PDF]

, 2012
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências Físicas e Matemáticas. Programa de Pós-Graduação em QuímicaRecentemente, nosso grupo de pesquisa relatou a presença das cumarinas 6-metoxi-7-preniloxicumarina e ...
Espíndola, Leandro
core  

From nature to nanoscale: advances, challenges, and preclinical translation of nanofiber drug delivery systems containing plant‐derived active ingredients

Journal of the Science of Food and Agriculture, EarlyView.
Abstract Since the early 1960s, nanotechnology has been a critical area of science, allowing for the development of sophisticated nanomaterials. Nanofibers, one of the most widely used nanotechnological drug delivery systems, have emerged as a highly versatile platform within modern pharmaceutical sciences.
Heybet Kerem Polat, Yasin Turanlı, Nihat Kurt, Sefa Gözcü, Emre Tunçel, Hilal Bacanak, Eren Aytekin, Sedat Ünal   +7 more
wiley   +1 more source

Coumarins from Peucedanum luxurians

, 2007
Ten coumarins were isolated from Peucedanum luxurians. The rare coumarins stenocarpin, stenocarpin isobutyrate, officinalin, officinalin isobutyrate, 8-methoxypeucedanin and the known xanthotoxin, isoimperatorin, bergaptene, peucedanin and cnidilin were ...
Chinou, I., Widelski, J., Magiatis, P., Glowniak, K., Fokialakis, N.   +4 more
core   +1 more source

Zinc triflate catalyzed solvent-free synthesis of coumarins

Discover Chemistry
The Pechmann condensation remains one of the most direct routes to coumarin frameworks; however, its efficiency is often compromised by harsh Brønsted acids or solvent effects.
S. S. Kale, N. K. Dhurve, Shaikh Tanveer, Mohammad Ali, Abhijit B. Ingle, Nilesh S. Shelke, Rohinee R. Dharamkar, Hemant S. Chandak   +7 more
doaj   +1 more source

Gradient‐Structured Polymer Fiber Mats for Broadly Tunable Multicolor and White Lasing

Laser &Photonics Reviews, EarlyView.
Hierarchically engineered electrospun fiber mats containing separated red, green, and blue dyes enable highly tunable multicolor and white random lasing. Spatially controlled dye distribution suppresses energy transfer, allowing precise color adjustment across wide color gamuts and accurate reproduction of daylight white standards.
Alina Szukalska, Kinga Halicka‐Stępień, Jastin Popławski, Katarzyna Kołodzińska, Michal Majkowski, Joanna Cabaj, Lech Sznitko   +6 more
wiley   +1 more source