Results 71 to 80 of about 189,846 (385)

A procedure for the determination of proteolytic activity [PDF]

open access: yes, 1950
The difficulties introduced by the desire to maintain a constant pH during an enzyme-catalyzed hydrolysis of peptide-like substrates and at the same time to determine the extent of hydrolysis by an acid-base titration have been pointed out (1), but to ...
Iselin, Beat M., Niemann, Carl
core  

Hydroxymethylation as a Novel Environmental Biosensor [PDF]

open access: yesCurrent Environmental Health Reports, 2014
Beyond the genome, epigenetics has become a promising approach in understanding the interactions between the gene and the environment. Epigenetic regulation includes DNA methylation, histone modifications, and non-coding RNAs. Among these, DNA methylation, which is the addition of a methyl group to the fifth base of cytosine to produce 5-methylcytosine
Wan Yee Tang   +4 more
openaire   +3 more sources

Multifunctional Neural Probes Enable Bidirectional Electrical, Optical, and Chemical Recording and Stimulation In Vivo

open access: yesAdvanced Materials, EarlyView.
Convergence drawing is used to create flexible, microscale, multifunctional fiber‐based neural probes. Optimized materials selection enables individual devices to perform neural recording, electrical stimulation, optogenetics, fiber photometry, fluid delivery, and voltammetric neurotransmitter detection in rodents.
Nicolette Driscoll   +16 more
wiley   +1 more source

Freezing-tolerant and robust gelatin-based supramolecular conductive hydrogels with double-network structure for wearable sensors

open access: yesPolymer Testing, 2021
It is significant to design stretchable conductive hydrogels with high integrated mechanical and excellent anti-freezing performances for broadening their application fields. Herein, a freezing-tolerant and robust poly(N-hydroxymethyl acrylamide)/gelatin/
Jia Yang   +5 more
doaj  

Tetrahydrobiopterin analogues with NO-dependent pulmonary vasodilator properties [PDF]

open access: yes, 2011
Reduced NO levels due to the deficiency of tetrahydrobiopterin (BH4) contribute to impaired vasodilation in pulmonary hypertension Due to the chemically unstable nature of BH4 it was hypothesised that oxidatively stable analogues of BR, would be able to ...
Gibson, Colin   +4 more
core   +1 more source

Magnetically Controlled Reversible Photomagnetic Nanoactuators for Dynamic Contrast Enhancement in Optical Coherence Tomography

open access: yesAdvanced Materials, EarlyView.
Photomagnetic nanoactuators with ≈90% scattering efficiency in the second near‐infrared window are demonstrated to exhibit magnetic field‐controlled modulation of optical scattering and optical coherence tomography signals. These nanoactuators are reversibly assembled and disassembled under the external magnetic field modulation, enabling enhanced ...
Myeongsoo Kim   +5 more
wiley   +1 more source

Sterol synthesis. A simplified method for the synthesis of 32-oxygenated derivatives of 24,25-dihydrolanosterol.

open access: yesJournal of Lipid Research, 1981
A simplified method is described for the preparation of 14 alpha-hydroxymethyl-4,4-dimethyl-5 alpha-cholest-8-en-e beta-ol, 14 alpha-hydroxymethyl-4,4-dimethyl-5 alpha-cholest-7-en-3 beta-ol, and 14 alpha-hydroxymethyl-4,4-dimethyl-5-alpha-cholest-6-en-3
E J Parish, G J Schroepfer, Jr
doaj  

High‐Energy‐Density Aqueous Zinc‐Ion Batteries: Recent Progress, Design Strategies, Challenges, and Perspectives

open access: yesAdvanced Materials, EarlyView.
Strategies achieving high‐energy‐density aqueous zinc‐ion batteries are summarized and analyzed from both their separate advancements and the integrated effectiveness in this review. Then, perspectives are given for valuable guidance for further development of high‐energy‐density aqueous zinc‐ion batteries.
Mingcong Tang   +4 more
wiley   +1 more source

2-(Hydroxymethyl)pyridinium chloride

open access: yesActa Crystallographica Section E, 2008
In the title molecular salt, C6H8NO+·Cl−, the packing is consolidated by N—H...Cl and O—H...Cl hydrogen bonds, resulting in the formation of [010] chains of alternating cations and anions.
Leigh Anna M. Ottley   +2 more
doaj   +1 more source

Thiocoumarin Caged Nucleotides: Synthetic Access and Their Photophysical Properties

open access: yesMolecules, 2020
Photocages have been successfully applied in cellular signaling studies for the controlled release of metabolites with high spatio-temporal resolution.
Jiahui Ma   +11 more
doaj   +1 more source

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