Results 111 to 120 of about 291,669 (391)

The Hierarchical Structure of Sheep Wool and Its Impact on Physical Properties

open access: yesAdvanced Functional Materials, EarlyView.
Sheep wool, a prevalent α‐keratinous fiber, is an essential model for studying protein‐based fibers. Its genetic diversity across breeds enables the establishment of multiscale structure‐property relationships, uncovering previously elusive insights into wool's hierarchical structure.
Serafina R. France Tribe   +9 more
wiley   +1 more source

Chain Length of Amphipathic-Type Thioesters Dramatically Affects Reactivity in Aqueous Amidation Reactions with Cysteine Esters

open access: yesSynOpen, 2017
The reaction of five amphipathic-type thioesters, CH3(CH2) m COS(CH2) n COONa (m + n = 12), with cysteine hexyl, butyl, and ethyl esters were studied in aqueous medium.
Ikumi Otomo   +3 more
doaj   +1 more source

Iridium-catalyzed reductive Ugi-type reactions of tertiary amides

open access: yesNature Communications, 2018
Amides are ubiquitous in the fine chemical, agrochemical and pharmaceutical industries, but are rarely exploited as substrates for homologous amine synthesis.
Lan-Gui Xie, D. Dixon
semanticscholar   +1 more source

Smart Nanogels as Enzyme‐Driven Nanomotors for Navigating Viscous Physiological Barriers

open access: yesAdvanced Functional Materials, EarlyView.
Two families of urease‐powered nanomotors (NMs), with and without a p‐(2‐hydroxyethyl methacrylate) (p‐HEMA) shell, have been successfully prepared. Both types exhibit effective motion in highly viscous synovial fluid media at low urea concentrations (25 mM).
David Esporrín‐Ubieto   +6 more
wiley   +1 more source

Synthesis of (S)-1-(2-chloroacetyl)pyrrolidine-2-carbonitrile: A key intermediate for dipeptidyl peptidase IV inhibitors

open access: yesBeilstein Journal of Organic Chemistry, 2008
An alternative and practical synthesis of (S)-1-(2-chloroacetyl)pyrrolidine-2-carbonitrile was achieved. Reaction of L-proline with chloroacetyl chloride was followed by conversion of the carboxylic acid moiety of the resulting N-acylated product into ...
Santosh K. Singh   +2 more
doaj   +1 more source

USE OF DIFFERENT EXTENDERS TO CRYOPRESERVATION OF MANGALARGA MARCHADOR SPERM

open access: yesCiência Animal Brasileira, 2015
The techniques applied to animal reproduction such as artificial insemination, transfer and in vitro production of embryos, heat synchronization and induction, and gametes cryopreservation have been more utilized in veterinary practice each day ...
Jessica Neri Nascimento   +3 more
doaj   +1 more source

Enzyme‐Regulated Extended Swelling of Hydrogels for Dehiscence‐Less Tissue Expansions

open access: yesAdvanced Functional Materials, EarlyView.
An interpenetrating hydrogel network with swelling under regulation by enzymatic degradation (INSURED) is fabricated to avoid dehiscence. INSURED remains structurally intact post‐implantation, while HYAL injection enables control over the onset and rate of swelling.
Byung Ik Park   +10 more
wiley   +1 more source

Constituintes químicos fixos e voláteis dos talos e frutos de Piper tuberculatum Jacq. e das raízes de P. hispidum H. B. K. Fixed and volatile chemical constituents from stems and fruits of Piper tuberculatum Jacq. and from roots of P. hispidum H. B. K.

open access: yesActa Amazonica, 2008
Os óleos essenciais dos frutos e talos finos de Piper tuberculatum e das raízes de P. hispidum, coletados no estado de Rondônia, foram obtidos por hidrodestilação e analisados por GC e GC-MS. Foram identificados como constituintes majoritários, nos óleos
Valdir Alves Facundo   +5 more
doaj   +1 more source

DENTA: A Dual Enzymatic Nanoagent for Self‐Activating Tooth Whitening and Biofilm Disruption

open access: yesAdvanced Functional Materials, EarlyView.
The nanoapatite with dual enzymes (DENTA) accumulates in dentinal tubules, reducing hypersensitivity caused by dental nerve exposure and facilitating continuous ROS generation through salivary glucose for effective, long‐term whitening. The dentin structures remain non‐destructive due to the low concentration of ROS, demonstrating excellent cell ...
Junseok Kim   +13 more
wiley   +1 more source

Ionic Control of Microstructure and Lubrication in Charged, Physically Cross‐Linked Hydrogels

open access: yesAdvanced Functional Materials, EarlyView.
Here, charged, physically cross‐linked poly(methacrylamide‐co‐methacrylic acid) hydrogels stabilized by a short‐range attractive, long‐range repulsive potential is investigated. This work uncovers how salt addition alters not only swelling, but also the microstructure and dynamics, near‐surface stiffness and charge, and ultimately, its lubricity. Salts
Alexander Deptula   +1 more
wiley   +1 more source

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