Results 21 to 30 of about 14,844 (154)

Attempted DNA extraction from a Rancho La Brea Columbian mammoth (Mammuthus columbi): prospects for ancient DNA from asphalt deposits. [PDF]

, 2014
Fossil-bearing asphalt deposits are an understudied and potentially significant source of ancient DNA. Previous attempts to extract DNA from skeletons preserved at the Rancho La Brea tar pits in Los Angeles, California, have proven unsuccessful, but it ...
Farrell, Aisling B, Gold, David A, Harris, John M, Jacobs, David K, Robinson, Jacqueline, Thalmann, Olaf   +5 more
core   +1 more source

Ultrasound‐Assisted Epoxy Resin Curing Monitored by Impedance Spectroscopy

Polymer Engineering &Science, EarlyView.
Ultrasound enhances epoxy cure rates via localized heating without altering cure kinetics. Impedance spectroscopy provides a direct, non‐destructive measure of cure progression, enabling accurate mapping of degree of cure in real time. ABSTRACT Epoxy resins are widely used in aerospace and automotive manufacturing as structural adhesives and matrices ...
Daniel Csehngeri, Anoush Poursartip, Edmond Cretu   +2 more
wiley   +1 more source

Adhesion of Newly Developed Composite Resin Splinting Materials to Enamel: Effect of Enamel Surface Treatment

Dental Traumatology, EarlyView.
ABSTRACT Background/Aim To evaluate the shear bond strength (SBS) of newly developed composite resin materials intended for dental splinting to enamel and to determine whether phosphoric acid etching alone provides reliable adhesion. Material and Methods Four experimental materials (G‐Fix, Light Fix, Ortho Connect, and Ortho Connect Flow) were compared
Wonkyu Shin, Ji‐Soo Song, Hyuntae Kim, Wonjoon Moon, Teo Jeon Shin, Shin Hye Chung, Jin‐Soo Ahn, Hong‐Keun Hyun   +7 more
wiley   +1 more source

Curriculum Gaps in Periodontal Knowledge Among Medical Students: A Cross‐Sectional Study

European Journal of Dental Education, EarlyView.
ABSTRACT Introduction Periodontal disease is a major public health concern with well‐established systemic implications. Despite the increasing emphasis on the periodontal‐systemic health connection, the extent to which periodontal disease is integrated into medical education is still unclear.
Atanur Sarioglu, Tugrul Kirtiloglu
wiley   +1 more source

Evaluation of physical, chemical, and color‐matching properties of monochromatic resin composites: An in vitro study

European Journal of Oral Sciences, EarlyView.
Abstract The objectives of this study are to evaluate, in vitro, the microhardness, sorption, solubility, color stability, and color‐matching ability of monochromatic resin composites: Palfique Omnichroma / Tokuyama (Mono1) and Vittra APS Unique / FGM (Mono2) compared with the conventional resin composite: Filtek Z250 XT / Solventum (Conv).
Ericka dos Santos Lopes, Mayara Evelly Duarte de Lima, Emanuel Ewerton Mendonça Vasconcelos, Natália Gomes de Oliveira, Gabriela Queiroz de Melo Monteiro, Luís Felipe Espíndola‐Castro   +5 more
wiley   +1 more source

Stroke penumbra defined by an MRI-based oxygen challenge technique: 1. validation using [14C]2-deoxyglucose autoradiography [PDF]

, 2011
Accurate identification of ischemic penumbra will improve stroke patient selection for reperfusion therapies and clinical trials. Current magnetic resonance imaging (MRI) techniques have limitations and lack validation.
Barrie Condon, Celestine Santosh, Christopher McCabe, Craig A Robertson, I Mhairi Macrae, Keith W Muir, Kucinski T, Lindsay Gallagher, Maria del Rosario Lopez-Gonzalez, William M Holmes   +9 more
core   +1 more source

Post‐curing effects on mechanical properties staining resistance of a 3D‐printed resin versus a direct composite for definitive restorations

European Journal of Oral Sciences, EarlyView.
Abstract This study evaluated the mechanical performance and staining resistance of a three‐dimensional (3D)‐printed resin (VarseoSmile Crown Plus) subjected to different post‐curing times (0, 5, 10, 15, and 20 min), compared with a conventional nanofilled resin composite (Filtek Z350XT).
Bianca Rossi, Arthur Henrique Marques Massarenti, Giulia Gamero Pizzanelli, Márcia Valéria Gualberto Barbosa de Queiroz, Filipe Milazzo dos Santos, Matheus Kury, Adriano Fonseca Lima   +6 more
wiley   +1 more source

Practitioners' Perceptions of Augmented and Virtual Reality in Endodontic Treatment Planning: A Pilot Study

International Endodontic Journal, EarlyView.
ABSTRACT Aim To develop a streamlined software workflow for converting cone‐beam computed tomography (CBCT) data into augmented reality (AR) and virtual reality (VR) formats, and to evaluate dental practitioners' perceptions of these advanced visualisation modalities compared to conventional CBCT analysis for endodontic treatment planning.
Marcel Reymus, Nils Werner, Falk Schwendicke, Ralf Krug   +3 more
wiley   +1 more source

Calculation and Simulation Processing of Tooth Surface of Negative Pressure Angle Spiral Clutch

Jixie chuandong, 2019
The method of machining negative pressure angle spiral clutches with disc milling cutter and gear milling machine is studied. The mathematical model is established according to the characteristics of spiral clutches firstly, and the coordinate ...
Xu Zengjun Deng Jing Jiang Chuang Nie Shaowu
doaj  

Superradiance for atoms trapped along a photonic crystal waveguide [PDF]

, 2015
We report observations of superradiance for atoms trapped in the near field of a photonic crystal waveguide (PCW). By fabricating the PCW with a band edge near the D$_1$ transition of atomic cesium, strong interaction is achieved between trapped atoms ...
Goban, A., Hood, J. D., Hung, C. -L., Kimble, H. J., Muniz, J. A., Painter, O., Yu, S. -P.   +6 more
core   +4 more sources