Results 61 to 70 of about 50,342 (276)

Effect of IAA on coumarins synthesis in Angelica dahurica under soil compactness stress

Scientific Reports
Angelica dahurica (Hoffm.) Benth. & Hook.f. ex Franch. & Sav (A. dahurica) is widely used in food, medicine and other applications due to its rich content of starch and secondary metabolites and is grown on a large scale in southwestern and northern ...
Xinglong Zhu, Xiaoyan Chen, Chengfeng Huang, Yongfeng Zhou, Tao Zhou, Qinghua Wu, Jin Pei   +6 more
doaj   +1 more source

Triphenylphosphine Mediated Synthesis of Functionalized Benzo-Fused Coumarins from Some OH Acids and Dialkyl Acetylene Dicarboxylate

Journal of Chemistry, 2013
Benzo-fused coumarins are prepared from 4-quinolinol by treatment with PPh3 and dialkyl acetylenedicarboxylate. Angular coumarins are prepared from 3-isoquinolinol and 7-hydroxyl coumarine with PPh3 and dialkyl acetylenedicarboxylate.
Bita Mohtat, Semiramis Nahavandian, Maryam Razaghi, Saeedeh Farsijani, Hoorieh Djahaniani   +4 more
doaj   +1 more source

A Family of Styrylcoumarins: Synthesis, Spectroscopic, Photophysical and Photochemical Properties [PDF]

, 2013
A new family of 5-styrylcoumarins exhibit E–Z isomerization around the Cα[DOUBLE BOND]Cβ bond with large extinction coefficients, medium-lived excited states, and moderate fluorescence quantum yields (see picture).
Borges, Bouas-Laurent, Chang, Del Nero, Gordo, Harayama, Irie, Jung, Katerinopoulos, Kim, Lee, Lin, Martins, Martins, Minkin, Molander, Schiedel, Seixas de Melo, Smith, Smith, Valente, Yu   +21 more
core   +1 more source

Do's and Don'ts When Visiting Circularly Polarized Luminescence

Advanced Optical Materials, EarlyView.
This perspective presents our insights into the principles, challenges, and opportunities of circularly polarized luminescence (CPL). Highlighting key concepts such as the dissymmetry factor (glum) and molecular design strategies, we discuss advances in CPL efficiency, emerging NIR emitters, solid‐state applications, and the growing role of theory and ...
Rafael G. Uceda, Sandra Míguez‐Lago, Carlos M. Cruz, Sara P. Morcillo, Luis Álvarez de Cienfuegos, Víctor Blanco, Araceli G. Campaña, Maria Ribagorda, Delia Miguel, Juan M. Cuerva   +9 more
wiley   +1 more source

Wash‐Free Multi‐Target Super‐Resolution Microscopy With Photocaged DNA Labels

Angewandte Chemie, EarlyView.
Photocaged DNA labels enable wash‐free multi‐target super‐resolution microscopy. A single type of DNA–fluorophore imager strand hybridizes to two orthogonal light‐responsive docking strands, whose hybridization state can be modulated with light from “ON” to “OFF” and vice versa.
Nina Kaltenschnee, Marina S. Dietz, Laurell F. Kessler, Yunqing Li, Janik Kaufmann, Alexander Heckel, Mike Heilemann   +6 more
wiley   +2 more sources

Changes in cell ultrastructure and morphology of Arabidopsis thaliana roots after coumarins treatment

Acta Societatis Botanicorum Poloniae, 2014
The ultrastructure and morphology of roots treated with coumarin and umbelliferone as well as the reversibility of the coumarins effects caused by exogenous GA, were studied in Arabidopsis thaliana.
Ewa Kupidłowska
doaj   +1 more source

Characterization of Dimethylsulfoxide / Glycerol Mixtures: A Binary Solvent System for the Study of "Friction-Dependent" Chemical Reactivity

, 2016
The properties of binary mixtures of dimethylsulfoxide and glycerol, measured by several techniques, are reported. Special attention is given to those properties contributing or affecting chemical reactions.
Angulo, Gonzalo, Brucka, Marta, Gerecke, Mario, Grampp, Günter, Jeannerat, Damien, Milkiewicz, Jadwiga, Mitrev, Yavor, Radzewicz, Czesław, Rosspeintner, Arnulf, Vauthey, Eric, Wnuk, Paweł   +10 more
core   +2 more sources

The effect of chalcogen substitution on the structure and spectroscopy of 4,7-dimethyl-2: H -chromen-2-one/thione analogues [PDF]

, 2017
4,7-Dimethyl-2H-chromen-2-one (1) and its novel sulfur analogue 4,7-dimethyl-2H-chromen-2-thione (2) were synthesized and fully characterized by spectroscopic methods and mass spectrometry. The crystal structure of compound 2 has been determined by X-ray
Delgado Espinosa, Zuly Yuliana, Echeverría, Gustavo Alberto, Erben, Mauricio Federico, Mahmood, Shamsul, Piro, Oscar Enrique, Saeed, Aamer   +5 more
core   +2 more sources

Nature‐Inspired Surface Modification Strategy Reverses the Autophagic Flux Impairment of Mitochondrial Transplantation for Attenuating Ischemic Strokes

Advanced Science, EarlyView.
The functionalized starch modifies the mitochondrial surface and encapsulates resveratrol into the cavity of helices, facilitating a novel mitochondrial transplantation platform (MLSR). Upon internalization in recipient cells, MLSR triggers mitophagy and maintains positive autophagic flux through RIP1/RIP3 pathway inhibition.
Nisha Wang, Qiyang Ding, Lei Shi, Ji Xia, Shuyue Zhang, Chenxin Jian, Yixiao Yan, Xiuhua Luo, Jiarui Wang, Ming Cheng, Yiqiong Jia, Hao Tian, Wei Gao   +12 more
wiley   +1 more source

Near‐Infrared‐Light‐Driven Photochemistry and Photocatalysis: Mechanisms, Recent Applications, and Opportunities in Organic Synthesis and Biology

Angewandte Chemie, EarlyView.
This minireview highlights recent advances in catalyst development and mechanistic strategies that enable photochemical and photocatalytic reactivity under 700–1000 nm NIR light, emphasizing how long‐wavelength excitation expands opportunities in both synthetic chemistry and biology.
Santosh K. Pagire, Wesley J. Olivier, Debabrata Maiti, Alex C. Bissember   +3 more
wiley   +2 more sources