Results 51 to 60 of about 115,119 (281)

Counterion Dependent Side‐Chain Relaxation Stiffens a Chemically Doped Thienothiophene Copolymer

Advanced Functional Materials, EarlyView.
Oxidation of a thienothiophene copolymer, p(g3TT‐T2), via different doping strategies and dopant molecules resulted in materials with similar oxidation levels and a high electrical conductivity of ≈100 S cm−1. However, mechanical properties varied significantly, with sub‐glass transition temperatures and elastic moduli spanning from –44°C to –3°C and ...
Mariavittoria Craighero, Meghna Jha, Elsa Veronica Flores‐Vela, Joost Kimpel, Andreas Schaefer, Jiali Guo, Jesika Asatryan, Alberto Peinador Veiga, Shuichi Haraguchi, Per‐Anders Carlsson, Jaime Martín, Mariano Campoy‐Quiles, Christian Müller   +12 more
wiley   +1 more source

Severity of 2005 Caribbean Bleaching

, 2016
Shown here is an image that plots the accumulated heat stress that corals in the Caribbean experienced in 2005 and compares it with the conditions in 2010. Reports indicated widespread bleaching.
National Oceanic and Atmospheric Administration (NOAA)
core   +2 more sources

Comparative evaluation to composite resin bleaching using ozone-enhanced low-concentration hydrogen peroxide

Scientific Reports
To assess the effectiveness of bleaching tea-stained composite resin utilizing low concentration of hydrogen peroxide followed by ozone (7%HP and ozone) compared with high concentration of HP alone (30%HP).
Mahmoud K. AL-Omiri, Dania Sa’ed Hussam Abuherra, Khaled M. AL-Omiri, Ali Y. Alsaeed, Mohammad Alamri, Ali M. Alqahtani, Saleh Ali Alqahtani, Ghadeer Saleh Alwadai, Naif Abogazalah, Edward Lynch   +9 more
doaj   +1 more source

X‐Functionality–Driven Photocatalytic Hydrogen Evolution in 2D 4‐X‐PEA2SnI4 Perovskites

Advanced Functional Materials, EarlyView.
We report a water‐based synthesis of 2D 4‐X‐PEA2SnI4 perovskite microcrystals with prominent photocatalytic (PC) activity for H2 production. The synergy between organic functionalization and HI‐derived iodide scavenges holes suppress octahedral distortion, and favor electron accumulation, enabling a PC H2 evolution ∼20 µmol·g−1 and long‐term stability ...
Taeyeon Kim, Gayoung Seo, Seong Yeon Park, Juwon Jang, Yunho Ahn, Samiksha Mukesh Jain, Samrat Das Adhikari, Harumi Correa‐Leiva, Ignacio Utreras‐Asenjo, Oscar A. Douglas‐Gallardo, Carina Pareja‐Rivera, Kayoung Cho, Byeongsung Kim, Jhonatan Rodriguez‐Pereira, Eunseo Choi, JaeHong Park, Jin Ho Bang, Danilo H. Jara‐Quinteros, Sixto Giménez, Seog Joon Yoon, Andrés F. Gualdrón‐Reyes, Iván Mora‐Seró   +21 more
wiley   +1 more source

Effect of pH conditioners on tooth bleaching

Clinical and Experimental Dental Research, 2019
The purpose of this study was to evaluate the effect of pH conditioners on tooth bleaching using hematoporphirin‐stained paper and artificially discolored bovine tooth model.
Yuki Ito, Masayuki Otsuki, Junji Tagami
doaj   +1 more source

High-concentration carbamide peroxide can reduce the sensitivity caused by in-office tooth bleaching: a single-blinded randomized controlled trial

Journal of Applied Oral Science, 2018
Objectives A single-blinded, randomized, parallel clinical trial evaluated the use of 37% carbamide peroxide (CP) on bleaching effectiveness and tooth sensitivity reported by patients undergoing in-office tooth bleaching, in comparison with the results ...
Aline Carvalho PEIXOTO, Savil Costa VAEZ, Natalia Andrade de Resende PEREIRA, Carla Nogueira da Silva SANTANA, Karla Danielly Alves SOARES, Ana Clara Teles Roriz ROMÃO, Lorena Fernandes FERREIRA, Paulo Ricardo Saquete MARTINS-FILHO, André Luis FARIA-E-SILVA   +8 more
doaj   +1 more source

Structure‐Guided Dynamical Mechanics in Bioinspired Double Twisted Laminated Thin Films

Advanced Functional Materials, EarlyView.
This work explores a dynamic mechanistic study of crack propagation and puncture testing via real‐time monitoring of crack initiation, propagation, and termination through nature‐inspired single and double twisted architectures fabricated from cellulose nanocrystals.
Justin Brackenridge, Olivia Harper, Jaejun Lee, Sergio Gonzalez‐Munoz, Vladimir V. Tsukruk   +4 more
wiley   +1 more source

Annual program review chemical pulping and bleaching.

, 1997
"March 24, 1997."Environmentally compatible production of bleached chemical pulp: project F013 / T.J. McDonough ... [et al.] ; Fundamentals of bleaching chemistry: project F015 / D. Dimmel ... [et al.] ; High efficiency bleaching / Art J.
Courchene, Charles E., Ragauskas, Arthur J., Welder, Catherine Owens, Althen, Elizabeth, Allison, Lenong, Rudie, Alan W., Shakhet, Alexander R., Dimmel, Donald R., Rawat, Nidhi, Sealey, James E., II, Moe, Storker, McDonough, Thomas Joseph   +11 more
core   +1 more source

Effect of the Purple Corn Beverage “Chicha Morada” in Composite Resin during Dental Bleaching

Scientifica, 2016
During dental bleaching the staining potential of the surface would increase. This study aims to evaluate the staining susceptibility of one bleached composite resin after the exposure to three different beverages: Peruvian purple corn based beverage ...
Eric Dario Acuña, Leyla Delgado-Cotrina, Francisco Aurelio Rumiche, Lidia Yileng Tay   +3 more
doaj   +1 more source

Evaluating the effectiveness of using ClO2 bleaching as substitution of traditional Cl2 on PCDD/F reduction in a non-wood pulp and paper mill using reeds as raw materials

Green Energy & Environment, 2018
The effectiveness of ClO2 bleaching as a replacement for conventional Cl2 bleaching, which is intensively practiced in developing countries, to reduce polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) in non-wood pulp and paper mills has not ...
Lili Yang, Liping Fang, Linyan Huang, Yuyang Zhao, Guorui Liu   +4 more
doaj   +1 more source