Results 31 to 40 of about 224,478 (288)

A methionine‐lined active site governs carbocation stabilization and product specificity in a bacterial terpene synthase

FEBS Letters, EarlyView.
This study reveals a unique active site enriched in methionine residues and demonstrates that these residues play a critical role by stabilizing carbocation intermediates through novel sulfur–cation interactions. Structure‐guided mutagenesis further revealed variants with significantly altered product profiles, enhancing pseudopterosin formation. These
Marion Ringel, Carl P. O. Helmer, Shani Zev, Ronja Driller, Emily Buhr, Markus Reinbold, Renana Schwartz, Gabriel Foley, Mikael Boden, Daniel Garbe, Gerhard Schenk, Dan Thomas Major, Bernhard Loll, Thomas Brück   +13 more
wiley   +1 more source

Microstructural Evolution and Vacancy Defect Formation in Mn–Mo–Ni RPV Steel Under Low Cycle Fatigue: Insights From EBSD and PALS

Advanced Engineering Materials, EarlyView.
Low‐cycle fatigue damage in Mn–Mo–Ni reactor pressure vessel steel is examined using a combined electron backscatter diffraction and positron annihilation lifetime spectroscopy approach. The study correlates texture evolution, dislocation substructure development, and vacancy‐type defect formation across uniform, necked, and fracture regions, providing
Apu Sarkar, Dhanadeep Dutta, G. Bharat Reddy   +2 more
wiley   +1 more source

Cold cathodes based on carbonic nanostructured layered structures [PDF]

Технологія та конструювання в електронній апаратурі, 2013
The paper describes formation conditions for and the structure of diamond-like materials films used in the manufacture of layered cold cathodes of emission electronics devices.
A. F. Belyanin, V. V. Borisov, M. A. Timofeev, A. N. Lamskiy   +3 more
doaj   +1 more source

XPS ANALYSIS OF DIAMOND-LIKE CARBON FILMS

Вестник Северо-Кавказского федерального университета, 2022
The paper presents an analysis of the results of a study into diamond-like carbon films synthesized by plasma-chemical deposition from hydrocarbon sources: methane (СН4) and ethane (С2Н6).
Roman V. Pigulev, Konstantin I. Sidorov, Vitaliy A. Tarala, Sergey V. Lisitsyn, Elena N. Belyaeva, Maria V. Moskvicheva   +5 more
doaj  

THERMAL STABILITY STUDY OF DIAMOND-LIKE CARBON FILMS CONTAINING CRYSTALLINE DIAMOND NANOPARTICLES

Revista UniVap, 2014
Nanocrystalline diamond (NCD) particles are incorporated into diamond-like carbon (DLC) films in order to prevent NCD-DLC electrochemical corrosion. In the current paper, the thermal stability of these films was investigated.
Beatriz Campos Ramos, Marina Fernandes Stein, Vladimir Jesus Trava-Airoldi, Anderson Oliveira Lobo, Fernanda Roberta Marciano   +4 more
doaj   +1 more source

Diamond/diamond-like carbon coated nanotube structures for efficient electron field emission [PDF]

, 2005
The present invention is directed to a nanotube coated with diamond or diamond-like carbon, a field emitter cathode comprising same, and a field emitter comprising the cathode.
Dimitrijevic, Steven, Loutfy, Raouf O., Withers, James C.   +2 more
core   +1 more source

Simulations of diamond nucleation in carbon fullerene cores [PDF]

, 2001
Recent experiments have shown that heavy ion or electron irradiation induces the nucleation of diamond crystallites inside concentric nested carbon fullerenes, i.e., bucky onions. This suggests that the fullerene acts as a nanoscopic pressure shell.
Astala, R., Frauenheim, Th., Jungnickel, G., Kaukonen, M., Nieminen, Risto M.   +4 more
core   +1 more source

Tribological Performance of 60NiTi Alloy Under Varying Contact Conditions and Elevated Temperatures in Linear Reciprocating Sliding

Advanced Engineering Materials, EarlyView.
This study investigates the tribological response of 60NiTi alloy under dry, water‐lubricated and high‐temperature conditions. The alloy exhibits decreasing wear volume and friction with increasing temperature due to the formation of protective oxide layers. The work clarifies dominant wear mechanisms and demonstrates the suitability of 60NiTi for high‐
Anthony Onyebuchi Okoani, Miguel Angel Selles, Maziar Ramezani   +2 more
wiley   +1 more source

Diffusion in diamond-like carbon

Diamond and Related Materials, 2003
b ¨¨ Abstract The diffusion of carbon and five other elements in amorphous carbon (a-C) films was studied. One set of samples were sp 2 dominated a-C and the other set of samples were sp dominated tetrahedral amorphous carbon (ta-C).
Kroger, H., Ronning, Carsten, Hofsass, H., Neumaier, P., Bergmaier, A., Gorgens, L., Dollinger, Guenther   +6 more
openaire   +2 more sources

Diamondlike flakes [PDF]

, 1985
A carbon coating was vacuum arc deposited on a smooth surface of a target which was simultaneously ion beam sputtered. The bombarding ions have sufficient energy to create diamond bonds. Spalling occurs as the carbon deposit thickens.
Banks, B. A.
core   +1 more source