Results 61 to 70 of about 51,192 (201)

Seasonal Phytochemical Variation and Bioactivity of Artemisia herba‐alba: Comparative Evaluation of Essential Oils and Phenolic Extracts With Antioxidant, Tyrosinase Inhibitory and In Silico Studies

Chemistry &Biodiversity, Volume 23, Issue 9, September 2026.
Artemisia herba‐alba: Phytochemistry and bioactivity of essential oils and phenolic extracts. ABSTRACT This study estimated the effect of seasonal variation on the chemical composition and biological activities of Artemisia herba‐alba hydroalcoholic extract and essential oil, focusing on antioxidant and tyrosinase inhibitory activities.
Alia Djekidel, Boulanouar Bakchiche, Hadjira Guenane, Imededdine Kadi, Hicham Gouzi, Ilyas Yildiz, Süleyman M. Çelik, Ramazan Erenler, Mosad A. Ghareeb, Stefania Garzoli   +9 more
wiley   +1 more source

A Perspective of Soy Isoflavones on Analytical, Biological, and Chemical Attributes

Legume Science, Volume 8, Issue 3, September 2026.
ABSTRACT This review covers key aspects of soybean (Glycine max), with a particular focus on its isoflavone content and biological properties. Soybeans maintain their position as both a nutraceutical and a pharmaceutical crop, with a broad range of dietary items used worldwide, including soy milk, fermented soy products, and various dietary supplements.
Sristy Suman, Joydeep Chatterjee, Gaurav Joshi, Raj Kumar, Muhammad Wahajuddin   +4 more
wiley   +1 more source

The synthesis of 4H-pyran containing hemispherands via pyrylium salts [PDF]

Tetrahedron Letters, 1986
Two new hemispherands 2a and 2b containing a central 4H-pyran unit were synthesized via appropiately substituted 2,6-phenyl pyrylium salts; largest ΔGo values of complexation of 2a and 2b with different alkali picrates are found for Na+ and K+.
Dijkstra, Pieter J., van Steen, B.J., Hams, B.H.M., den Hertog, H.J., Reinhoudt, David   +4 more
openaire   +2 more sources

Dual-site synergistic copper-polyoxoniobate: Ultralow-energy mechanochemical synthesis of bioactive 4H-pyrans

Nano Research
A copper-polyoxoniobate cluster (Cu-PONb) featuring Lewis acid/base dual sites was developed for the ultralow-energy mechanochemical synthesis of pharmacologically relevant 2-amino-3-cyano-4H-pyrans (ACPs).
Jiaqi Qin, Hongrui Tian, Weina Cai, Hui Chen, Zouguang Han, Yanfeng Bi, Baokuan Chen   +6 more
doaj   +1 more source

Organobase-catalyzed three-component reactions for the synthesis of 4H-2-aminopyrans, condensed pyrans and polysubstituted benzenes

Beilstein Journal of Organic Chemistry, 2014
Novel routes for the preparation of 2-amino-4H-pyran-3-carbonitrile 9, amino-arylbenzoic acid ester derivatives 13a,b, 2-aminotetrahydro-4H-chromene-3-carbonitrile 18, 3-amino-4-cyanotetrahydronaphthalene-2-carboxylic acid ester 26 and 4-amino-3,5 ...
Moustafa Sherief Moustafa, Saleh Mohammed Al-Mousawi, Maghraby Ali Selim, Ahmed Mohamed Mosallam, Mohamed Hilmy Elnagdi   +4 more
doaj   +1 more source

A Review on Green Synthetic Approaches in the Development of Quinoline Analogues

ChemistrySelect, Volume 11, Issue 33, 1 September 2026.
This review highlights recent advances in environmentally friendly approaches, including metal‐free systems, solvent‐free approaches, microwave, and ultrasonic‐assisted techniques, organo‐ and biocatalysis, ionic liquids, nanoparticle catalysis, electrochemical, and photocatalytic strategies for the synthesis of quinoline scaffolds.
Demis Zelelew, Ajay Bissessur, Parvesh Singh, Hogantharanni Govender   +3 more
wiley   +1 more source

Pääkaupunkiseudun 4H-yhdistyksen nuorisotoiminta : menetelmiä Dogsitter-nuorten osaamisen vahvistamiseksi

, 2021
4H on Suomen suurimpia lasten ja nuorten järjestöjä. Pääkaupunkiseudulla toimii 4H:n suurin paikallisyhdistys, joka tarjoaa harrastuksia, töitä ja yrittäjyyttä alueen lapsille ja nuorille.
Nissinen, Roosamari
core  

Nutritional quality traits in pea seed: Current knowledge and opportunities for genetic improvement

Annals of Applied Biology, Volume 189, Issue 2, September 2026.
This comprehensive review on nutritional traits in pea (Pisum sativum L.) summarizes the literature on genetic improvement of this highly nutritious and environmentally sustainable crop for different end‐uses. Abstract Pea is a major pulse crop valued for its high protein, carbohydrate, and mineral content, as well as its agronomic role in sustainable ...
Ahmed O. Warsame, Janneke Balk
wiley   +1 more source

A Green, Facile, and Efficient Synthesis of 4H-Benzo[b]pyrans Using 2,2’-Bipyridine as a Recyclable Organocatalyst

A Green, Facile, and Efficient Synthesis of 4H-Benzo[b]pyrans Using 2,2’-Bipyridine as a Recyclable ...
Farhad Shirini (703231), Mandana Momenpour Surchani (17874199), Omid Goli-Jolodar (5905964), Hassan Tajik (5905967)   +3 more
core   +1 more source

Facile and sustainable approach to the synthesis of 4H-pyrans using efficient pyrazolium ionic liquids functionalized silica nanocomposites catalysts

Journal of Saudi Chemical Society
The development of sustainable and multifunctional catalytic systems is of paramount importance in advancing green synthetic methodologies. In this study, a type of novel functional ionic liquids functionalized silica nanocomposites, based on a ...
Yulin Hu, Peixi Li, Yongting Zhao, Xiaobing Liu   +3 more
doaj   +1 more source