Results 51 to 60 of about 8,638 (163)

Exploring natural sunscreens: UVB protection and antioxidant properties in gadusol‐rich fish roes extracts

Photochemistry and Photobiology, EarlyView.
Gadusol‐rich extracts provide effective UVB protection and antioxidant activity in HaCaT cells and C. elegans, highlighting their potential as natural photochemoprotective agents for pharmaceutical and cosmetic applications. It also demonstrates remarkable in vitro antioxidant capacity and thermal stability over time.
Rocío Isla Naveira, Gabriela Hollmann, José María Monserrat, Ana Paula S. Votto, Julie Medeiros da Silveira, Andressa Mai Matsumoto, Lais Zortéa, Andy Joel Taipe Huisa, Agueda E. Massa, M. Sandra Churio   +9 more
wiley   +1 more source

Tuning High Temperature Performance Through Targeted Halide Substitution in a Bis(Imino)Pyridine‐Iron Ethylene Polymerization Catalyst

Journal of Applied Polymer Science, Volume 143, Issue 11, March 15, 2026.
Through systematic developments in catalyst design, we report a series of exceptionally active on iron catalysts for the polymerization of ethylene that can run at high operating temperature forming highly linear polyethylene waxes with narrow dispersity and high levels of vinyl chain ends that could be influenced by the operating temperature.
Elizabeth Ogbe, Yanping Ma, Yizhou Wang, Gregory A. Solan, Qiuyue Zhang, Tongling Liang, Wen‐Hua Sun   +6 more
wiley   +1 more source

Efficient Microwave‐Assisted Hydrolytic Recycling of Poly(L‐Lactic Acid)

ChemSusChem, Volume 19, Issue 5, 13 March 2026.
Microwave‐assisted hydrolysis of poly(lactic acid) promoted by a zinc catalyst. A highly efficient procedure performed under mild reaction conditions and in the absence of solvents aligning with green chemistry principles. Poly(L‐Lactic acid) (PLLA) is a bio‐based and biodegradable thermoplastic polymer widely recognized as a leading sustainable ...
Federica Santulli, Maëlie Chauvin, Rosaria Schettini, Marina Lamberti, Frédéric de Montigny, Christophe M. Thomas, Mina Mazzeo   +6 more
wiley   +1 more source

Asymmetric Negishi and Kumada Couplings

Advanced Synthesis &Catalysis, Volume 368, Issue 5, 3 March 2026.
This review summarizes asymmetric Negishi and Kumada cross‐coupling reactions from the 1980s through 2025. It examines enantioselective and enantiospecific transformations catalyzed by nickel, palladium, and cobalt complexes , highlighting ligand design, mechanistic insights, and applications in constructing complex chiral molecules and natural ...
Rui‐Heng Wang, Aishun Ding, Ramon Rios
wiley   +1 more source

Beyond Cocrystals: Hierarchical Functional Assemblies via Noncovalent Synthesis

Advanced Science, Volume 13, Issue 13, 3 March 2026.
Non‐covalent interactions (NCIs) drive the formation of organic cocrystals with diverse structures and tunable optoelectronic properties. This review explores the essential factors governing these properties, highlighting how the sequential nucleation of cocrystals leads to the self‐assembly of organic hierarchical structures (OHSs).
Ya‐Nan Zhu, Jin Feng, Ying‐Xin Ma, Hong‐Tao Lin, Li‐Wei Xie, Qi‐Liang Peng, Xue‐Dong Wang   +6 more
wiley   +1 more source

Synthesis and Spectroscopic Identification Of A New Series Of Biologically Active 2-Iminothiazolidine-4-One Derivatives

Science Journal of University of Zakho, 2014
A series of 2-amino-5-(substituted phenyl) 1,3,4- thiadiazol have been synthesized through the reaction of  thiosemicarbazide with substituted  benzoic acids in the presence of phosphoroxy chloride readily undergo  nucleophilic addition – elimination ...
Hashim J. Azeez, Venos S. Abdulla
doaj  

One‐Dimensional Covalent Organic Framework: Synthesis and Photoelectronic Applications

Advanced Energy and Sustainability Research, Volume 7, Issue 3, March 2026.
The functional monomer structures, synthetic strategies, and the related applications of one‐dimensional covalent organic frameworks, as well as their current challenges and future development directions, have been summarized and prospected. One‐dimensional covalent organic frameworks (1D COFs) are linear porous materials constructed from organic units
Xuxin Fan, Yang Xiong, Shuang Zhang, Enrui Li, Yao Yang, Qichun Zhang, Xianglin Yu, Junbo Li   +7 more
wiley   +1 more source

A new variant of the Friedlander reaction in the synthesis of 7,8-dihydro-6H-furo[2,3-b] quinolin-5-ones [PDF]

Известия Саратовского университета. Новая серия: Серия Химия. Биология. Экология
Hydrogenated derivatives of acridine exhibit various types of biological activity – their antibacterial, antitumor, antiviral, psychoactive properties are known. Using the example of heteroanalogs of tacrine, a known cholinesterase inhibitor, it is
Zotova, Irina Sergeevna, Куличихина , Яна Юрьевна, Ковыгин, Юрий Александрвич   +2 more
doaj   +1 more source

Decoding pH‐Driven Phase Transition of Lipid Nanoparticles

Small, Volume 22, Issue 14, 6 March 2026.
Ionizable aminolipids govern lipid nanoparticle (LNP) function through environment‐dependent protonation. Constant‐pH molecular dynamics reveal intrinsic, apparent, and surface pKa${\rm pK}_{\text{a}}$ values within LNP‐mimetic membranes, demonstrating that the LNP lipid environment induces a pronounced downward pKa${\rm pK}_{\text{a}}$ shift exceeding
Marius F.W. Trollmann, Rainer A. Böckmann   +1 more
wiley   +1 more source

Synthesis of 7-Acyl-2,4-disubstituted Pteridines by Radical Nucleophilic Substitution and Displacement Reactions

Pteridines, 2004
2,4-Disubstituted pteridine derivatives (1-3) react with acyl radicals very selectively in position 7 by a nucleophilic Substitution mechanism (4-10).
Döring Thomas, Boruah Romesh C., Pfleiderer Wolfgang   +2 more
doaj   +1 more source