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Justyna Widomska, Witold K Subczynski
Macular xanthophylls (MXs) are distinguished from other dietary carotenoids by their high membrane solubility and preferential transmembrane orientation. Additionally, these properties enhance the chemical and physical stability of MXs in the eye retina, and maximize their protective activities. The effectiveness of MXs' protection is also enhanced by their selective accumulation in the most vulnerable domains of retinal membranes. The retina is protected by MXs mainly through blue-light filtration, quenching of the excited triplet states of potent photosensitizers, and physical quenching of singlet oxygen...
June 14, 2018: Experimental Eye Research
Renata Suellen Galvão da Silva-Costa, Andressa Eveline de Lima Ribeiro, Isauremi Vieira de Assunção, Raimundo Fernandes de Araújo Júnior, Aurigena Antunes de Araújo, Gerlane Coelho Bernardo Guerra, Boniek Castillo Dutra Borges
OBJECTIVES: To study the intensity of inflammatory infiltrate and production of interleukin-1β (ll-1β), tumor necrosis factor-β (TNF-β), fibroblast growth factor-2 (FGF-2), glutathione peroxidase (GPX), and osteocalcin in response to in-office tooth bleaching in rats. MATERIAL AND METHODS: Twenty male Wistar rats were randomized into four groups (n=5) according to the received treatment (tooth bleaching or no treatment - control) and the period of euthanasia after treatment (24 h or 10 days)...
June 11, 2018: Journal of Applied Oral Science: Revista FOB
João Lima Rodrigues, Patrícia Souza Rocha, Silvia Letícia de Souza Pardim, Ana Cláudia Vieira Machado, André Luis Faria-E-Silva, Paulo Isaías Seraidarian
This controlled randomized clinical trial evaluated the effect of associating at-home and in-office bleaching procedures on tooth sensitivity (TS) and bleaching effectiveness. Forty patients subjected to on session of in-office bleaching with 38% peroxide hydrogen. Subsequently, the patients were randomly allocated to receive a second session of in-office bleaching or to use a tray containing 10% carbamide peroxide delivered during 7 consecutive days. The worst TS score reported during or after each bleaching procedure was recorded using a verbal rating scale and TS risk (score different from 0) was calculated...
March 2018: Brazilian Dental Journal
Sônia Saeger Meireles, Marilia Leão Goettems, Kaline Silva Castro, Fábio Correia Sampaio, Flávio Fernando Demarco
This study aimed to evaluate the effect on oral health-related quality of life (OHRQoL) of two treatment protocols for dental fluorosis in individuals enrolled in a randomized clinical trial. Seventy volunteers, who lived in a fluorosis endemic area in Brazil, and had at least four maxillary anterior teeth showing fluorosis with a Thylstrup and Fejerskov index from 1 to 7, were randomized into two treatment groups (n= 35): GI- enamel microabrasion; or GII- microabrasion associated with at-home bleaching. Microabrasion was performed using 37% phosphoric acid and pumice, and at-home tooth bleaching with 10% carbamide peroxide in a tray...
March 2018: Brazilian Dental Journal
Eduardo Robles, Javier Fernández-Rodríguez, Ananda M Barbosa, Oihana Gordobil, Neftali L V Carreño, Jalel Labidi
These data and analyses support the research article "Production of cellulose nanoparticles from blue agave waste treated with environmentally friendly processes" Robles et al. [1]. The data and analyses presented here include fitted curves for selected carbons of the 13 C CP-MAS NMR analysis; SEM images of the raw and bleached fibers, graphics with chemical composition and visual images of the fibers throughout the process.
June 2018: Data in Brief
Amr Alraies, David K Cole, Jeremy S Rees, Carl Glasse, Nigel Young, Rachel J Waddington, Alastair J Sloan
OBJECTIVES: Dietary stains can be adsorbed into the dentin of teeth. Using Orange II as a model dietary stain, this study investigated the strength of its interaction with the mineral and protein components of dentin matrix and how hydrogen peroxide (H2 O2 ) treatment influences this interaction. METHODS: Dentin slices were prepared from human teeth and were either deproteinized (5.6% sodium hypochlorite, 12 days), demineralised (0.5 M EDTA, 3 days) or left as intact control samples...
June 9, 2018: Journal of Dentistry
J R SoutoMaior, Sld de Moraes, Caa Lemos, Bc do E Vasconcelos, Majr Montes, E P Pellizzer
OBJECTIVE: A systematic review and meta-analyses were performed to evaluate the efficacy of tooth color change and sensitivity of teeth following in-office bleaching with and without light gel activation in adult patients. METHODS: This review was registered at PROSPERO (CRD 42017060574) and is based on the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA). Electronic systematic searches of PubMed/MEDLINE, Web of Science, and the Cochrane Library were conducted for published articles...
June 12, 2018: Operative Dentistry
S A AlZain
Context: The effect of home bleaching on surfaces of dental cements is controversial. Aim: The aim of this study was to microscopically evaluate and compare the effect of different concentrations of carbamide peroxide (CP) home bleaching agents on the surface of zinc phosphate cement. Materials and Methods: Forty 10 mm × 2 mm specimens of zinc phosphate cement were prepared following the manufacturer's directions. All specimens were immersed in artificial saliva at 37°C for 24 h...
June 2018: Nigerian Journal of Clinical Practice
Dominic Sagoe, Ståle Pallesen, Ncoza C Dlova, Margaret Lartey, Khaled Ezzedine, Ophelia Dadzie
PURPOSE: To estimate and investigate the global lifetime prevalence and correlates of skin bleaching. METHODS: A meta-analysis and meta-regression analysis was performed based on a systematic and comprehensive literature search conducted in Google Scholar, ISI Web of Science, ProQuest, PsycNET, PubMed, and other relevant websites and reference lists. A total of 68 studies (67,665 participants) providing original data on the lifetime prevalence of skin bleaching were included...
June 11, 2018: International Journal of Dermatology
Shingo Nishiguchi, Naohisa Wada, Hideyuki Yamashiro, Hiroshi Ishibashi, Ichiro Takeuchi
The colours of the hermatypic corals Porites sp. and Acropora cytherea at Sesoko Island, Okinawa, Japan, were photographed continuously, from 19 July to 6 September 2016, by an underwater camera equipped with a lens wiper. The average seawater temperature during the study period was 29.9 °C. The daily average seawater temperature (DAST) was >30.0 °C until 23 August 2016, and a maximum value of 31.2 °C was recorded on 2 August 2016. Red, green, and blue (RGB) values of these corals were analysed based on photographs taken at 14:00...
June 2018: Marine Pollution Bulletin
Hazrulrizawati Abd Hamid, Aizi Nor Mazila Ramli, Normaiza Zamri, Mashitah M Yusoff
Eleven compounds were identified during profiling of polyphenols by UPLC-QTOF/MS. In abundance was quercetin-3-O-α-l-arabinofuranoside in M. malabathricum ethanolic leaves extract while 6-hydroxykaempferol-3-O-glucoside was present in the leaves extract of M. decenfidum (its rare variety). TPC and TFC were significantly higher in M. decemfidum extract than M. malabathricum extract. During DPPH, FRAF and β-carotene bleaching assays, M. decemfidum extract exhibited greater antioxidant activity compared to M...
November 1, 2018: Food Chemistry
Deverick J Anderson, Rebekah W Moehring, David J Weber, Sarah S Lewis, Luke F Chen, J Conrad Schwab, Paul Becherer, Michael Blocker, Patricia F Triplett, Lauren P Knelson, Yuliya Lokhnygina, William A Rutala, Daniel J Sexton
BACKGROUND: The hospital environment is a source of pathogen transmission. The effect of enhanced disinfection strategies on the hospital-wide incidence of infection has not been investigated in a multicentre, randomised controlled trial. We aimed to assess the effectiveness of four disinfection strategies on hospital-wide incidence of multidrug-resistant organisms and Clostridium difficile in the Benefits of Enhanced Terminal Room (BETR) Disinfection study. METHODS: We did a prespecified secondary analysis of the results from the BETR Disinfection study, a pragmatic, multicentre, crossover cluster-randomised trial that assessed four different strategies for terminal room disinfection in nine hospitals in the southeastern USA...
June 4, 2018: Lancet Infectious Diseases
Baichao Zhang, Ying Chen, Pengyuan Wang, Yanchao Wang, Jinbo Liu, Shu Hu, Xusheng Xia, Youbao Sang, Hong Yuan, Xianglong Cai, Dong Liu, Baodong Gai, Jingwei Guo
In this work, the anisotropy of nonlinear absorption in a crystal Q-switch was considered when we established coupled rate equations of a passively Q-switched laser. A [100]-cut Cr4+ :YAG crystal, with initial transmission T0 =40%, was used as the Q-switch to evaluate the theoretical model, and the results of the simulation were in good accordance with the experiment. In order to control timing jitter of the passively Q-switched laser, an actively Q-switched Nd:YAG laser was applied to directly bleach the [100]-cut Cr4+ :YAG crystal...
June 1, 2018: Applied Optics
Sana Ali, Padmanabh Jha, Usman Khan
Isolated brown or white defects of less than few tenths of millimeter depth can be successfully treated with microabrasion. However, for deeper enamel defects, a combination of various techniques such as microabrasion/macroabrasion along with bleaching or full or partial veneering are available. Template-assisted direct veneering technique helps for better separation and contouring of individual tooth through which composite resin can be applied directly to tooth structure and artistically sculpted. Frequently, the gingival hyperpigmentation is caused by excessive melanin deposits mainly located in the basal and suprabasal cell layers of the epithelium...
April 2018: Contemporary Clinical Dentistry
Aryan Safaie, Nyssa J Silbiger, Timothy R McClanahan, Geno Pawlak, Daniel J Barshis, James L Hench, Justin S Rogers, Gareth J Williams, Kristen A Davis
The original version of the Article was missing an acknowledgement of a funding source. The authors acknowledge that A. Safaie and K.Davis were supported by National Science Foundation Award No. 1436254 and G. Pawlak was supported by Award No. 1436522. This omission has now been corrected in the PDF and HTML versions of the Article.
June 5, 2018: Nature Communications
Jingxia Zhang, Furong Wang, Chuanyun Zhang, Junhao Zhang, Yu Chen, Guodong Liu, Yanxiu Zhao, Fushun Hao, Jun Zhang
A VIGS method by agroinoculation of cotton seeds was developed for gene silencing in young seedlings and roots, and applied in functional analysis of GhBI-1 in response to salt stress. Virus-induced gene silencing (VIGS) has been widely used to investigate the functions of genes expressed in mature leaves, but not yet in young seedlings or roots of cotton (Gossypium hirsutum L.). Here, we developed a simple and effective VIGS method for silencing genes in young cotton seedlings and roots by soaking naked seeds in Agrobacterium cultures carrying tobacco rattle virus (TRV)-VIGS vectors...
June 4, 2018: Plant Cell Reports
Edyta Swider, Khalid Daoudi, Alexander H J Staal, Olga Koshkina, N Koen van Riessen, Eric van Dinther, I Jolanda M de Vries, Chris L de Korte, Mangala Srinivas
Photoacoustic imaging (PAI) is an emerging biomedical imaging technique that is now coming to the clinic. It has a penetration depth of a few centimeters and generates useful endogenous contrast, particularly from melanin and oxy-/deoxyhemoglobin. Indocyanine green (ICG) is a Food and Drug Administration-approved contrast agents for human applications, which can be also used in PAI. It is a small molecule dye with limited applications due to its fast clearance, rapid protein binding, and bleaching effect. Methods: Here, we entrap ICG in a poly(lactic- co -glycolic acid) nanoparticles together with a perfluorocarbon (PFC) using single emulsion method...
2018: Nanotheranostics
Seung-Ryoung Jung, Yi Deng, Christopher Kushmerick, Charles L Asbury, Bertil Hille, Duk-Su Koh
The stability of organic dyes against photobleaching is critical in single-molecule tracking and localization microscopy. Since oxygen accelerates photobleaching of most organic dyes, glucose oxidase is commonly used to slow dye photobleaching by depleting oxygen. As demonstrated here, pyranose-2-oxidase slows bleaching of Alexa647 dye by ∼20-fold. However, oxygen deprivation may pose severe problems for live cells by reducing mitochondrial oxidative phosphorylation and ATP production. We formulate a method to sustain intracellular ATP levels in the presence of oxygen scavengers...
June 4, 2018: Proceedings of the National Academy of Sciences of the United States of America
Lei Ouyang, Ling Yao, Taohong Zhou, Lihua Zhu
Malachite Green (MG) is a banned pesticide for aquaculture products. As a required inspection item, its fast and accurate determination before the products' accessing market is very important. Surface enhanced Raman scattering (SERS) is a promising tool for MG sensing, but it requires the overcoming of several problems such as fairly poor sensitivity and reproducibility, especially laser induced chemical conversion and photo-bleaching during SERS observation. By using a graphene wrapped Ag array based flexible membrane sensor, a modified SERS strategy was proposed for the sensitive and accurate detection of MG...
October 16, 2018: Analytica Chimica Acta
Ines Trigui, Héla Yaich, Assaâd Sila, Salma Cheikh-Rouhou, Ali Bougatef, Christophe Blecker, Hamadi Attia, M A Ayadi
In the present work, water-soluble polysaccharides were isolated from black cumin seeds. Polysaccharides were characterized by their carbohydrate composition, molecular weight, thermal stability and by FTIR, NMR spectroscopy and X-ray diffraction. The surface, the functional and the antioxidant properties of black cumin water-soluble polysaccharides (BCWSP) were also investigated. BCWSP consisted mainly of galacturonic acid (30.20%), glucuronic acid (17.66%) and neutral sugar (22.99%). BCWSP was composed of high peak molecular weight...
June 1, 2018: International Journal of Biological Macromolecules
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