Results 21 to 30 of about 43,472 (265)

Symmetrically and Unsymmetrically Bridged Methylenebis(allopurinols): Synthesis of Dimeric Potential Anti-Gout Drugs

Molecules, 2007
Liquid-liquid phase transfer alkylation of 4-methoxy-pyrazolo[3,4-d]-pyrimidine (1a) with a dichloromethane/dibromomethane mixture (3:1, v/v) gave the regioisomeric methylenebis(heterocycles) 3a–5a.
Frank Seela, Martina Anders, Helmut Rosemeyer   +2 more
doaj   +1 more source

Seasonal Changes in Microbial Dissolved Organic Sulfur Transformations in Coastal Waters

Microorganisms, 2020
The marine trace gas dimethylsulfide (DMS) is the single most important biogenic source of atmospheric sulfur, accounting for up to 80% of global biogenic sulfur emissions.
Joanna L Dixon, Frances E Hopkins, John A Stephens, Hendrik Schäfer   +3 more
doaj   +1 more source

Concentrations, sources, and biological consumption of acrylate and DMSP in the tropical Pacific and coral reef ecosystem in Mo’orea, French Polynesia

Frontiers in Marine Science, 2022
Shallow-water coral reefs hold large quantities of acrylate and its precursor dimethylsulfoniopropionate (DMSP), but production and removal processes for these compounds are poorly characterized.
Lei Xue, David J. Kieber, Marta Masdeu-Navarro, Miguel Cabrera-Brufau, Pablo Rodríguez-Ros, Stephanie G. Gardner, Cèlia Marrasé, Rafel Simó   +7 more
doaj   +1 more source

An improved method for the preparation of unsaturated phosphatidylcholines: acylation of sn-glycero-3-phosphorylcholine in the presence of sodium methylsulfinylmethide

Journal of Lipid Research, 1977
An improved method for the partial chemical synthesis of unsaturated and radioactively labeled phosphatidylcholines is described. This procedure offers advantages over conventional acylation methods in that it can be carried out on a millimole or ...
T G Warner, A A Benson
doaj   +1 more source

Aspects of the microscopic structure of curcumin solutions with water-dimethylsulfoxide solvent. Molecular dynamics computer simulation study

Condensed Matter Physics, 2023
We explore some aspects of the microscopic structure of curcumin solutions with water-dimethylsulfoxide solvent of variable composition. Molecular dynamics computer simulations at isobaric-isothermal conditions are used for this purpose.
T. Patsahan, O. Pizio
doaj   +1 more source

Cytokinin downregulates Photosystem II photochemistry during prolonged darkness in a phytochrome B-dependent manner. [PDF]

New Phytol
Cytokinin–phyB signaling modulates PSII photochemistry during prolonged darkness. Summary Cytokinins (CKs) delay dark‐induced senescence, but how they tune photosynthetic function in darkness remains unclear. We investigated the effects of classical aromatic CK benzylaminopurine and CK‐derived compound 1‐(2‐methoxyethyl)‐3‐(1,2,3‐thiadiazol‐5‐yl)urea ...
Kábrtová V, Kučerová Z, Chamrád I, Lenobel R, Roudnický P, Skalák J, Hudeček M, Zavadil Kokáš F, Rác M, Vánská T, Nisler J, Hejátko J, Strnad M, Špundová M, Plíhal O.   +14 more
europepmc   +2 more sources

Method optimization of ocular patches

Journal of Pharmacy and Bioallied Sciences, 2012
The intraocular patches were prepared using gelatin as the polymer. Ocular patch were prepared by solvent casting method. The patches were prepared for six formulations GP1, GP2, GP3, GP4, GP5 and GP6.
Kamalesh Upreti, Prashant Dabral, Vinod Rana, Kumud Upadhyaya, Anjali Badhani   +4 more
doaj   +1 more source

Comparação de métodos diretos de extração e quantificação dos teores de clorofilas em folhas do capim-Tifton 85 Comparison of direct methods of extraction and chlorophyll contents quantification in leaves of Tifton 85 bermudagrass

Ciência Rural, 2010
O objetivo deste estudo foi verificar qual é o melhor protocolo para extração das clorofilas a, b e total (a + b) a ser aplicado em estudos com a gramínea forrageira Tifton 85 (Cynodon spp.). Os resultados revelaram que os melhores extratores, tomando-se
Élio Barbieri Junior, Roberto Oscar Pereyra Rossiello, Mirton José Frota Morenz, Roberta Cristiane Ribeiro   +3 more
doaj   +1 more source

Pore Morphology of Heavily Doped P-Type Porous Silicon

Proceedings, 2019
Tuning the pore diameter of porous silicon (PS) is essential for some applications such as biosensing, where the pore size can filter the entrance of some analytes or increase its sensitivity. However, macropore (>50 nm) formation on p-type silicon is
David Martín-Sánchez, Salvador Ponce-Alcántara, Jaime García-Rupérez   +2 more
doaj   +1 more source

Manajemen Ekstravasasi Kemoterapi Manajemen Ekstravasasi Kemoterapi [Extravasasion Chemoteraphy Management]

Jurnal Respirasi, 2019
Extravasation is a problem for patient receiving chemotherapy. This will cause pain, ulcer, necrosis and might be a permanent disability. Extravasation is a leakage of a fluid or medicine to the surrounding subcutaneous tissue of the vein or vascular ...
Nur Nubli Julian Parade, Isnu Pradjoko
doaj   +1 more source