7,489 results match your criteria color stability


Effects of different remineralizing agents on color stability and surface characteristics of the teeth following vital bleaching.

Microsc Res Tech 2021 Apr 14. Epub 2021 Apr 14.

Department of Restorative Dentistry, Faculty of Dentistry, Firat University, Elazig, Turkey.

The aim of the study was to investigate the effects of various remineralizing agents on the color stability and surface characteristics of the teeth after vital bleaching. The extracted 96 human incisors were used for the study. Initially, the samples were randomly divided into two groups and exposed to in-office and at-home bleaching agents. Read More

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Effects of mouthwashes on color stability and surface roughness of three different resin-based composites.

Niger J Clin Pract 2021 Apr;24(4):555-560

Department of Dentistry, Faculty of Dentistry, Selcuk University, Konya, Turkey.

Objective: The aim of this study is to evaluate the effects of different types of mouthwashes (Klorhexidin, Curasept ADS 205, Meridol, Listerine Cool Citrus) on the surface roughness and color changes of a microhybrid (Point 4), a bulk fill (SonicFill), and a nanohybrid (Nova Compo-N) resin-based composite (RBC).

Materials And Methods: Disk-shaped specimens were prepared from tested RBCs and divided into four subgroups which immersed in four different types of mouthwashes. The specimens were subjected to immersion cycles in the mouthwashes and artificial saliva (n = 8). Read More

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Differences in survival and phenotypic traits of curly birch preserved by heterovegetative propagation: a case study from Central-East Europe.

Sci Rep 2021 Apr 13;11(1):8079. Epub 2021 Apr 13.

Arboretum Borova hora, Technical University in Zvolen, T. G. Masaryka 24, Zvolen, 960 01, Slovak Republic.

Curly birch (Betula pendula Roth. var. carelica [Merklin] Hämet-Ahti) is a disappearing representative of the Betula genus facing a regeneration failure in a large part of its natural distribution in Europe. Read More

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Identification of shell-color-related microRNAs in the Manila clam Ruditapes philippinarum using high-throughput sequencing of small RNA transcriptomes.

Sci Rep 2021 Apr 13;11(1):8044. Epub 2021 Apr 13.

Dalian Ocean University, Dalian, 116023, China.

Shell-color polymorphism is a common phenomenon in several mollusk species and has been associated with thermal capacity, developmental stability, shell strength, and immunity. Shell-color polymorphism has been related to the differential expression of genes in several signal transduction pathways; however, the functions of micro-RNAs (miRNAs) in shell-color formation remain unclear. In the present study, we compared high-quality, small-RNA transcriptomes in three strains of the Manila clam Ruditapes philippinarum with specific shell-color patterns, artificially selected for six generations. Read More

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Buccal Pedicle Flap Combined with Porcine Collagen Matrix: a Follow-up of 2 years on 40 Consecutive Cases.

Clin Adv Periodontics 2021 Apr 13. Epub 2021 Apr 13.

Director O.R.E.C.-Oral Reconstruction and Education Center Rome (Italy), Via Rovereto 6, Rome, 00198, Italy.

Introduction: A thick peri-implant mucosa is of importance to prevent recession, color alterations, bone remodeling and promote "creeping attachment". A volume stable porcine cross-linked collagen matrix has been recently introduced for soft tissue regeneration and volume maintenance. The aim of this study was to investigate peri-implant soft tissue healing and stability on 40 consecutive patients treated with buccal pedicle flap combined with the use of the collagen matrix. Read More

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Single-Molecule Fluorescence Methods to Study Protein Exchange Kinetics in Supramolecular Complexes.

Methods Mol Biol 2021 ;2281:49-65

Molecular Horizons and School of Chemistry and Molecular Bioscience, University of Wollongong, Wollongong, NSW, Australia.

Recent single-molecule studies have demonstrated that the composition of multi-protein complexes can strike a balance between stability and dynamics. Proteins can dynamically exchange in and out of the complex depending on their concentration in solution. These exchange dynamics are a key determinant of the molecular pathways available to multi-protein complexes. Read More

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January 2021

Low-Temperature Molten Salts Synthesis: CsPbBr Nanocrystals with High Photoluminescence Emission Buried in Mesoporous SiO.

ACS Energy Lett 2021 Mar 11;6(3):900-907. Epub 2021 Feb 11.

Nanochemistry Department and Electron Microscopy Facility, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy.

Using mesoporous SiO to encapsulate CsPbBr nanocrystals is one of the best strategies to exploit such materials in devices. However, the CsPbBr/SiO composites produced so far do not exhibit strong photoluminescence emission and, simultaneously, high stability against heat and water. We demonstrate a molten-salts-based approach delivering CsPbBr/mesoporous-SiO composites with high PLQY (89 ± 10%) and high stability against heat, water, and aqua regia. Read More

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Long-term color stability of light-polymerized resin luting agents in different beverages.

J Prosthodont Res 2021 Apr 9. Epub 2021 Apr 9.

Department of Crown and Bridge, School of Life Dentistry at Tokyo, The Nippon Dental University, 1-9-20 Fujimi, Chiyoda-ku, Tokyo.

Purpose: The purpose of this study was to evaluate the long-term color stability of light-polymerized resin luting agents stored in different beverages.

Methods: Eleven shades of two light-polymerized resin luting agents, Choice2 (A1, A2, B1, TRANSLUCENT, MILKY OPAQUE, and MILKY BRIGHT) and BeautiCem Veneer (H-Value, M-Value, L-Value, Ivory-D, Ivory-L) were selected in this study. Disk-shaped specimens were fabricated with 1. Read More

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Biodegradable chitosan-poly(vinyl alcohol) intelligent films fortified with anthocyanins isolated from Clitoria ternatea and Carissa carandas for monitoring freshness of beverages.

Int J Biol Macromol 2021 Apr 8. Epub 2021 Apr 8.

Natural Product Research Center of Excellence, Division of Biological Science, Faculty of Science, Prince of Songkla University, Hat Yai, Songkla 90112, Thailand. Electronic address:

Biodegradable chitosan-poly(vinyl alcohol) films containing natural anthocyanin-rich extracts were prepared using solvent casting method and employed as intelligent indicators for monitoring beverages freshness. The surface and cross-sectional scanning electron micrograph indicated a compact structure for the intelligent films, whereas the atomic force micrograph indicated a 16.22 and 20. Read More

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Injectable and reversible preformed cryogels based on chemically crosslinked gelatin methacrylate (GelMA) and physically crosslinked hyaluronic acid (HA) for soft tissue engineering.

Colloids Surf B Biointerfaces 2021 Mar 31;203:111725. Epub 2021 Mar 31.

Biomedical Engineering Department, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran.

Hydrogels are a promising choice for soft tissue (cartilage, skin and adipose) engineering and repair. However, lack of interconnected porosity and poor mechanical performance have hindered their application, especially in natural polymer-based hydrogels. Cryogels with the potential to overcome the shortcomings of hydrogels have drawn attention in the last few years. Read More

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Stability Determination of an Extemporaneously Compounded Ambrisentan Suspension by High Performance Liquid Chromatography Analysis.

J Pediatr Pharmacol Ther 2021 31;26(3):265-270. Epub 2021 Mar 31.

Objective: Ambrisentan, an endothelin receptor antagonist FDA-approved for the treatment of pulmonary arterial hypertension in adult patients, lacks an acceptable pediatric dosage form. The objective of this investigation was to determine the stability of an extemporaneously compounded ambrisentan suspension.

Methods: Ambrisentan suspension was compounded to a concentration of 1 mg/mL using commercially available suspending agents. Read More

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[Auxiliary pathological diagnosis algorithm based on color moments for frozen-section of thyroid cancer].

Zhonghua Bing Li Xue Za Zhi 2021 Apr;50(4):349-352

Hangzhou Diyingjia Technology Co., Ltd,Hangzhou 311100, China.

To develop a color-moment based model for frozen-section diagnosis of thyroid lesions, and to evaluate the model's value in the frozen-section diagnosis of thyroid cancer. In this study, 550 frozen thyroid pathological slides, including malignant and non-malignant cases, were collected from Taizhou Central Hospital (Taizhou University Hospital), China, between June 2018 and January 2020. The 550 digitalized frozen-section slides of thyroid were divided into training set (190 slides), validation set (48 slides), test set A (60 slides) and test set B (252 slides). Read More

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Sensing with Chirality-Pure Near-Infrared Fluorescent Carbon Nanotubes.

Anal Chem 2021 Apr 8. Epub 2021 Apr 8.

Institute of Physical Chemistry, Göttingen University, 37077 Göttingen, Germany.

Semiconducting single-wall carbon nanotubes (SWCNTs) fluoresce in the near-infrared (NIR) region, and the emission wavelength depends on their chirality (,). Interactions with the environment affect the fluorescence and can be tailored by functionalizing SWCNTs with biopolymers such as DNA, which is the basis for fluorescent biosensors. So far, such biosensors have been mainly assembled from mixtures of SWCNT chiralities with large spectral overlap, which affects sensitivity as well as selectivity and prevents multiplexed sensing. Read More

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Development of Nanoemulsion-based Hydrogel Containing Andrographolide: Physical Properties and Stability Evaluation.

J Pharm Bioallied Sci 2020 Nov 5;12(Suppl 2):S816-S820. Epub 2020 Nov 5.

Department of Pharmaceutics, Faculty of Pharmacy, Universitas Gadjah Mada, Sekip Utara, Yogyakarta, Indonesia.

Introduction: Andrographolide is a compound that shows various pharmacological activities, which can be applied topically or orally. Nanoemulsion can improve drug solubility and stability, but has limitations for topical application. Incorporation of nanoemulsion into hydrogel can increase the viscosity of the system which can prolong the drug residence time. Read More

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November 2020

Discovery of a natural cyan blue: A unique food-sourced anthocyanin could replace synthetic brilliant blue.

Sci Adv 2021 Apr 7;7(15). Epub 2021 Apr 7.

Mars Wrigley Global Innovation Center, Chicago, IL 60642, USA.

The color of food is critical to the food and beverage industries, as it influences many properties beyond eye-pleasing visuals including flavor, safety, and nutritional value. Blue is one of the rarest colors in nature's food palette-especially a cyan blue-giving scientists few sources for natural blue food colorants. Finding a natural cyan blue dye equivalent to FD&C Blue No. Read More

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A New BODIPY Material for Pure Color and Long Lifetime Red Hyperfluorescence Organic Light-Emitting Diode.

ACS Appl Mater Interfaces 2021 Apr 7. Epub 2021 Apr 7.

Organic Optoelectronic Device Laboratory, Department of Information Display, Kyung Hee University, 26, Kyungheedae-ro, Dongdaemun-gu, Seoul, 02447, Republic of Korea.

A red fluorescent material, 1,3,7,9-tetrakis(4-(-butyl)phenyl)-5,5-difluoro-10-(2-methoxyphenyl)-5-4l4,5l4-dipyrrolo[1,2-:2',1'-][1,3,2]diazaborinine (4tBuMB), as an emitting dopant in a thermally activated delayed fluorescence (TADF) sensitized hyperfluorescence organic light-emitting diode (HFOLED) is reported. The 4tBuMB shows a high photoluminescence quantum yield (PLQY) of 99% with an emission maximum at 620 nm and a full width at half-maximum (fwhm) of 31 nm in solution. Further, it shows a deep lowest unoccupied molecular orbital (LUMO) of 3. Read More

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Sesame Oil () as a New Challenge for Reinforcement of Conventional Glass Ionomer Cement, Could It Be?

Authors:
Neven S Aref

Int J Dent 2021 22;2021:5516517. Epub 2021 Mar 22.

Department of Dental Biomaterials, Faculty of Dentistry, Mansoura University, Mansoura, Egypt.

Purpose: Despite the advantages of glass ionomer cement (GIC) including chemical bonding to the tooth structure and fluoride release, its low-grade mechanical properties make it a topic for research. Accordingly, this study was conducted to assess the ability of sesame oil as a natural bioactive additive to reinforce conventional glass ionomer cement.

Materials And Methods: Sesame oil was blended into the liquid component of the cement in ratios of 3 and 5 (v/v%). Read More

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Formulation and evaluation of antioxidant and antityrosinase activity of Polygonum amplexicaule herbal gel.

Pak J Pharm Sci 2020 Sep;33(5):1961-1969

Department of Biochemistry, Pir Mehr Ali Shah, Arid Agriculture University, Rawalpindi, Pakistan.

Medicinal plants are long been used for pharmaceutical and cosmetic industry. Among medicinal plants, Polygonum amplexicaule of family polygonaceae has traditional use in medicines and skin care. P. Read More

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September 2020

Broadband emission GdScAlO:Ce transparent ceramics with a high color rendering index for high-power white LEDs/LDs.

Opt Express 2021 Mar;29(6):9474-9493

The discovery of single structure Ce doped garnet transparent ceramics (TCs) with a broad full width at half maximum (FWHM) is essential to realize a high CRI for high-power white light emitting diodes (LEDs) and laser diodes (LDs). In this work, by utilizing the ion substitution engineering strategy, pure phase GdScAlO:Ce (GSAG:Ce) TC with a broad FWHM of 132.4 nm and a high CRI value of 80. Read More

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Two-step microalgal (Coelastrella sp.) treatment of raw piggery wastewater resulting in higher lipid and triacylglycerol levels for possible production of higher-quality biodiesel.

Bioresour Technol 2021 Mar 30;332:125081. Epub 2021 Mar 30.

Cell Factory Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea; Department of Environmental Biotechnology, KRIBB School of Biotechnology, University of Science and Technology (UST), 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, Republic of Korea. Electronic address:

Microalgal treatment of undiluted raw piggery wastewater is challenging due to ammonia toxicity and a deep dark color hampering photosynthesis. To overcome these problems, (1) a microalga (Coelastrella sp.) was isolated from an ammonia-rich environment, (2) the wastewater treatment was divided into two steps: a heterotrophic process followed by a mixotrophic process, and (3) a narrower transparent photobioreactor was employed with higher light intensity in the mixotrophic process. Read More

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Luminescence and Energy Transfer of Color-Tunable YMgAlSiO:Eu,Ce Phosphors.

Inorg Chem 2021 Apr 3. Epub 2021 Apr 3.

College of Chemistry, Jilin University, Qianjin Street 2699, Changchun 130012, China.

Color-tunable phosphors can be obtained through codoping strategies and energy transfer regulation. Ce and Eu are the most common and effective activator ions used in phosphor materials. However, the energy transfer from Eu to Ce is rarely reported. Read More

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Robustness to High Temperatures of AlO-Coated CsPbBr Nanocrystal Thin Films with High-Photoluminescence Quantum Yield for Light Emission.

ACS Appl Nano Mater 2020 Aug 16;3(8):8167-8175. Epub 2020 Jul 16.

Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy.

Lead-halide perovskite nanocrystals are a promising material in optical devices due to their high photoluminescence (PL) quantum yield, excellent color purity, and low stimulated emission threshold. However, one problem is the stability of the nanocrystal films under different environmental conditions and under high temperatures. The latter is particularly relevant for device fabrication if further processes that require elevated temperatures are needed after the deposition of the nanocrystal film. Read More

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Physicochemical, Microbiological and Technological Properties of Red Deer () Milk during Lactation.

Animals (Basel) 2021 Mar 22;11(3). Epub 2021 Mar 22.

Food Quality Research Group, Institute for Regional Development (IDR), Universidad de Castilla-La Mancha, 02071 Albacete, Spain.

This study describes chemical, physical, microbiological and technological characteristics of red deer milk and the effect of lactation on these parameters in order to know their potential aptitude to elaborate dairy products. During 18 weeks, milk from five hinds was monitored for composition, bacteriology, somatic cell count (SCC), physical properties and rennet coagulation. Mean values (g/100 g) for fat, protein, lactose and dry matter were 10. Read More

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Insights into the Thermo-Mechanical Treatment of Brewers' Spent Grain as a Potential Filler for Polymer Composites.

Polymers (Basel) 2021 Mar 12;13(6). Epub 2021 Mar 12.

Institute of Materials Technology, Poznan University of Technology, Piotrowo 3, 61-138 Poznań, Poland.

This paper investigated the impact of twin-screw extrusion parameters on the properties of brewers' spent grain. The chemical structure, antioxidant activity, particle size, and color properties, as well as the emission of volatile organic compounds during extrusion, were investigated. The main compounds detected in the air during modifications were terpenes and terpenoids, such as α-pinene, camphene, 3-carene, limonene, or terpinene. Read More

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Chemical, Microbiological and Sensory Stability of Steam Extracted Jaboticaba () Juice.

Foods 2021 Mar 30;10(4). Epub 2021 Mar 30.

Laboratório de Alimentos Funcionais, Nutrition Institute, Federal University of Rio de Janeiro, Av. Carlos Chagas Filho, 373, CCS, Bloco J, 2° Andar, Sala 16, Rio de Janeiro 21941-902, Brazil.

Jaboticaba () is a Brazilian berry rich in phenolic compounds, much appreciated for its sweet and slightly acid taste, and highly perishable. Thus, we aimed at producing jaboticaba juice by steam extraction and at investigating its microbiological, sensorial and chemical qualities during storage for up to 168 days. Juice was microbiologically safe and even though unsweetened juice was well accepted, sucrose addition further improved flavor (21%), overall impression (11%) and purchase intent (21%) scores. Read More

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Effect of Breed Purity and Rearing Systems on the Stability of Sliced Iberian Dry-Cured Ham Stored in Modified Atmosphere and Vacuum Packaging.

Foods 2021 Mar 30;10(4). Epub 2021 Mar 30.

Meat Quality Area, Center for Scientific and Technological Research of Extremadura (CICYTEX-La Orden), Junta de Extremadura, Guadajira, 06187 Badajoz, Spain.

The long-term storage stability of three quality categories of sliced Iberian dry-cured ham defined by the Spanish Iberian Quality Standard (, purebred Iberian reared outdoors in Montanera system; , Iberian × Duroc crossed (50%) pigs reared outdoors in Montanera system;, and , Iberian × Duroc crossed (50%) pigs commercially fed) and packaged under vacuum and modified atmosphere packaging (MAP) was studied. Commercial category affected the shelf life, being and presented the highest lipid oxidation during storage, whereas the effect of packaging was not as clear as the effect of commercial category. MAP preserved more the colour and the antioxidants content than vacuum packaging, while this latter reduced lipid oxidation development and maintained better the brightness and flavour of slices than MAP. Read More

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Intelligent Dynamic Identification Technique of Industrial Products in a Robotic Workplace.

Sensors (Basel) 2021 Mar 5;21(5). Epub 2021 Mar 5.

Faculty of Mechanical Engineering, Slovak University of Technology in Bratislava, Námestie Slobody 17, 812 31 Bratislava, Slovakia.

The article deals with aspects of identifying industrial products in motion based on their color. An automated robotic workplace with a conveyor belt, robot and an industrial color sensor is created for this purpose. Measured data are processed in a database and then statistically evaluated in form of type A standard uncertainty and type B standard uncertainty, in order to obtain combined standard uncertainties results. Read More

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Pea Protein Nanoemulsion Effectively Stabilizes Vitamin D in Food Products: A Potential Supplementation during the COVID-19 Pandemic.

Nanomaterials (Basel) 2021 Mar 31;11(4). Epub 2021 Mar 31.

Department of Community Health Sciences, College of Applied Medical Sciences, King Saud University, Riyadh 11433, Saudi Arabia.

Vitamin D deficiency is a global issue which has been exacerbated by the COVID-19 pandemic-related lockdowns. Fortification of food staples with vitamin D provides a solution to alleviate this problem. This research explored the use of pea protein nanoemulsion (PPN) to improve the stability of vitamin D in various food products. Read More

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Impact of High-Pressure Homogenization Parameters on Physicochemical Characteristics, Bioactive Compounds Content, and Antioxidant Capacity of Blackcurrant Juice.

Molecules 2021 Mar 23;26(6). Epub 2021 Mar 23.

Faculty of Computer Science and Food Science, Lomza State University of Applied Sciences (PWSIiP), Akademicka 14, 18-400 Łomża, Poland.

High-pressure homogenization (HPH) is one of the food-processing methods being tested for use in food preservation as an alternative to pasteurization. The effects of the HPH process on food can vary depending on the process parameters used and product characteristics. The study aimed to investigate the effect of pressure, the number of passes, and the inlet temperature of HPH processing on the quality of cloudy blackcurrant juice as an example of food rich in bioactive compounds. Read More

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Simulation and Non-Invasive Testing of Vinegar Storage Time by Olfaction Visualization System and Volatile Organic Compounds Analysis.

Foods 2021 Mar 4;10(3). Epub 2021 Mar 4.

School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China.

An olfactory visualization system conducts a qualitative or quantitative analysis of volatile organic compounds (VOCs) by utilizing the sensor array made of color sensitive dyes. The reaction chamber is important to the sensor array's sufficient and even exposure to VOCs. In the current work, a reaction chamber with an arc baffle embedded in the front of the air inlet for drainage effect was designed. Read More

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