Results 91 to 100 of about 5,918,604 (240)

Facilitating the Isolation of Polar Natural Products: Mild 1,1′‐Carbonyldiimidazole‐Enabled Method for Derivatization of Acids and Alcohols

open access: yesEuropean Journal of Organic Chemistry, Volume 28, Issue 28, July 29, 2025.
In this work, 1,1′‐carbonyldiimidazole, a relatively inexpensive reagent with inherently low toxicity, is utilized to activate polar natural products containing carboxylic acids and alcohols to enable the formation of less polar species (N‐acylimidazoles and N‐acyloxymidazoles).
Moses M. Mutungi   +3 more
wiley   +1 more source

Ice Cores from the St. Elias Mountains, Yukon, Canada: Their Significance for Climate, Atmospheric Composition and Volcanism in the North Pacific Region [PDF]

open access: yes, 2014
A major achievement in research supported by the Kluane Lake Research Station was the recovery, in 2001 –02, of a suite of cores from the icefields of the central St.
Bourgeois, Jocelyne   +12 more
core   +4 more sources

Excited‐State Basicity Diverts the Site‐Selectivity of Aromatic Deuteration: Application to the Late‐Stage Labeling of Pharmaceuticals

open access: yesAngewandte Chemie International Edition, Volume 64, Issue 25, June 17, 2025.
We present a metal‐free method for aromatic deuterium labeling via photoexcitation in deuterated HFIP. This approach leverages the enhanced basicity of excited‐state aromatics to achieve selective hydrogen isotope exchange at challenging positions. Demonstrated on complex drug molecules, this efficient strategy provides a valuable tool for isotope ...
Eva Rivera‐Chao   +5 more
wiley   +1 more source

Organic composition of carbonaceous aerosols in an aged prescribed fire plume

open access: yes, 2007
International audienceAged smoke from a prescribed fire (dominated by conifers) impacted Atlanta, GA on 28 February 2007 and dramatically increased hourly ambient concentrations of PM2.5 and organic carbon (OC) up to 140 and 72 ?g m?3, respectively.
Hu, Y. T.   +5 more
core   +3 more sources

In vitro Anti-inflammatory Effect of Carthamus lanatus L. [PDF]

open access: yes, 2003
The anti-inflammatory activity of four total extracts, their fractions and two main constituents (α-bisabolol β-D-fucopyranoside and luteolin 7-O-glucoside) of Carthamus lanatus L.
Atta-Ur-Rahman   +6 more
core   +2 more sources

Metabolomic and Genomic Analysis of Bioactive Compounds of Phacidium infestans Karsten DSM 5139 Cultivated on Pinus sylvestris Needles

open access: yesEnvironmental Microbiology Reports, Volume 17, Issue 3, June 2025.
Phacidium infestans DSM 5139 was studied for its ability to penetrate pine needles and overcome their inhibitory compounds. Using mass spectrometry and genome mining, we identified the biological and molecular strategies enabling nutrient acquisition and resilience against chemical stress, providing insights into the survival mechanisms of this cold ...
Chahira Zerouki   +5 more
wiley   +1 more source

Folate-conjugated nanoparticles as a potent therapeutic approach in targeted cancer therapy [PDF]

open access: yes, 2015
The selective and efficient drug delivery to tumor cells can remarkably improve different cancer therapeutic approaches. There are several nanoparticles (NPs) which can act as a potent drug carrier for cancer therapy.
Bahrami, B.   +8 more
core   +1 more source

Assessment of Metabolome Variation in Field‐Grown Lettuce in Context to Its Different Types and Soil Types as Analyzed via GC‐MS Analysis and Using of Chemometric Tools

open access: yeseFood, Volume 6, Issue 2, April 2025.
Lettuce (Lactuca sativa L.) is one of the most important ready‐to‐eat vegetables widely consumed worldwide owing to its myriad nutritional and health benefits. A total of 111 peaks were identified via gas chromatography‐mass spectrometry. ABSTRACT Lettuce (Lactuca sativa L.) is one of the most important ready‐to‐eat vegetables widely consumed worldwide
Mostafa H. Baky   +3 more
wiley   +1 more source

Identification of the proto-inkstone by organic residue analysis: a case study from the Changle Cemetery in China

open access: yesHeritage Science, 2018
The inkstone is a specific writing implement in China that was popularized since the Han Dynasty (202 BC–AD 220). A rectangular/round grinding plate accompanied with a grinding stone is considered as a kind of proto-inkstone.
Meng Ren, Renfang Wang, Yimin Yang
doaj   +1 more source

Smart Hydrogels for Sustainable Agriculture

open access: yesEcoMat, Volume 7, Issue 4, April 2025.
The core properties and key attributes of hydrogels for agricultural applications have attracted significant attention. Hydrogels can serve as platforms for self‐watering systems, controlled pesticide delivery, and slow‐release fertilizers, addressing challenges associated with conventional agricultural practices.
Jungjoon Park, Weixin Guan, Guihua Yu
wiley   +1 more source

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