Results 111 to 120 of about 9,013 (298)

EXPERIMENTAL INVESTIGTION OF THE FRETTING PHENOMENON-DEPENDENCE OF NUMBERS CYCLES [PDF]

Fiabilitate şi Durabilitate
Fretting is now fully identified as a small amplitude oscilatory motion which induces a harmonic tangential force between two surfaces in contact.It is related to three main loadings, i.e. fretting-wear, fretting-fatigue and fretting corrosion.Fretting
Ştefan GHIMIȘI
doaj  

TRANSITION IN THE FRETTING PHENOMENON BASED ON THE VARIABILE COEFFICIENT OF FRICTION [PDF]

Fiabilitate şi Durabilitate, 2010
Fretting is now fully identified as a small amplitude oscilatory motion which induces a harmonic tangential force between two surfaces in contact. It is related to three main loadings, i.e. fretting-wear, fretting-fatigue and fretting corrosion.Fretting
Stefan GHIMIŞI
doaj  

One‐Step Preparation of Lanthanide‐Doped Polyurea Multicolor Microspheres for Versatile Fluorescent Applications

Advanced Science, EarlyView.
Lanthanide‐doped polyurea microspheres are prepared via a facile one‐step precipitation polymerization. They exhibit strong hydrogen‐bonding and coordination interactions with excellent properties, including multicolor emission, high quantum yield (75.3%), remarkable stability, redispersibility, and biocompatibility.
Guiyu Zhang, Xiaoxia Yu, Xinhui Wang, Xiang Zheng Kong, Xiangling Gu, Jitao Liu, Shusheng Li, Xiaoli Zhu, Lianbao Cao, Xubao Jiang   +9 more
wiley   +1 more source

Estimación del límite de fatiga bajo condiciones de fretting [PDF]

, 2002
La evidencia experimental muestra que bajo condiciones de fatiga por fretting, los primeros es-tadios de la propagación de las grietas están fuertemente influenciados por el gradiente de tensiones existente en el material en las proximidades del contacto.
Domínguez Abascal, Jaime, García-Lomas Jung, Francisco Javier, Navarro Robles, Alfredo, Vallellano Martín, Carpóforo   +3 more
core  

Membrane Fusion‐Mediated Cytosolic Delivery of Threose Nucleic Acids via Homotypic Nanoparticles Overcomes Drug Resistance in Triple‐Negative Breast Cancer

Advanced Science, EarlyView.
This study introduces a biomimetic “nanofusion” platform that integrates the biostability of threose nucleic acids (TNA) with homotypic cell‐membrane cloaking to combat drug‐resistant TNBC. By leveraging a non‐canonical membrane‐fusion pathway for direct cytosolic delivery, the platform bypasses endosomal sequestration. To achieve potent AKT2 silencing
Wei Zheng, Tristan Juin Han Chang, Xinchao Li, Zhongqi Zhou, Chung Tin, Kenward Vong, Pierre Karam, Pik Kwan Lo   +7 more
wiley   +1 more source

A review of conducting polymers in electrical contact applications

, 2007
A review of recent developments in fretting studies in electrical contacts is presented, focusing on developments in conducting polymer surfaces. Fretting is known to be a major cause of contact deterioration and failure; commonly exhibited as the ...
Lam, Liza, McBride, J.W.
core  

Synthesis of Cyclopropene‐Modified Fatty Acids Allows Single‐Cell Quantification of Uptake by Immune Cells

Angewandte Chemie, EarlyView.
Cyclopropene fatty acids have been made that allow the study of fatty acid uptake in complex mixtures of immune cells with single cell resolution and combined with metabolic and proteomic analysis so that for the first time nutrient uptake can be correlated to the phenotype of single immune cell.
Luuk Reinalda, Graham A. Heieis, Laura Bogue Edgerton, Kristine Bertheussen, Diana Torres‐García, Marouane el Boujadayni, Kas Steuten, Jeroen M. Punt, Wouter P. F. Driever, Connor Corrigan, Xinyuan Wang, Bart Everts, David Finlay, Mario van der Stelt, Sander I. van Kasteren   +14 more
wiley   +2 more sources

Cholesterol Laundry of Cell Membrane and Fatty Liver by Detergent Liposomes to Improve Anti‐Cancer Drug Responsiveness of Patient Liver Tissues

Advanced Science, EarlyView.
Cholesterol‐enriched plasma membranes in hepatocellular carcinoma impede drug penetration. Cholesterol (+)‐liposomes act as membrane‐specific detergents, extracting cholesterol and reducing barrier function without cytotoxicity. Following endocytosis, cholesterol transfers from endosomes to liposomes and is metabolized in the ER.
Chansik Kim, Joo Kyung Noh, Sewoom Baek, Seung Eun Yu, Jueun Kim, Seongyo Lee, Youngji Oh, Dai Hoon Han, Seyong Chung, Hak‐Joon Sung   +9 more
wiley   +1 more source

Algunas consideraciones sobre la fatiga por fretting y sus paliativo [PDF]

, 2000
En este trabajo se presenta un análisis de las condiciones de trabajo de los sistemas sometidos a fatiga por fretting, se hace una revisión de los paliativos más usuales empleados para reducir el dañ.o del fretting y se analizan las condiciones en que ...
Domínguez Abascal, Jaime
core  

Unraveling G‐Quadruplex and i‐Motif Coexistence Within a Double‐Stranded DNA

Angewandte Chemie, EarlyView.
The relative thermodynamic profiles of G‐quadruplex (G4), i‐Motif (iM), and the duplex counterpart tune the simultaneous G4 and iM formation within a double‐stranded (ds) DNA. ABSTRACT DNA can transiently fold into variable arrangements, which are expected to exploit regulatory functions. Guanine‐rich sequences can fold into G‐quadruplexes (G4s), while
Davide Auricchio, Michele Ghezzo, Uroš Zavrtanik, Luca Bertini, Valeria Libera, Riccardo Rigo, Jurij Lah, Claudia Sissi   +7 more
wiley   +2 more sources