keyword
MENU ▼
Read by QxMD icon Read
search

whitening

keyword
https://www.readbyqxmd.com/read/28198460/automated-detection-of-malarial-retinopathy-in-digital-fundus-images-for-improved-diagnosis-in-malawian-children-with-clinically-defined-cerebral-malaria
#1
Vinayak Joshi, Carla Agurto, Simon Barriga, Sheila Nemeth, Peter Soliz, Ian J MacCormick, Susan Lewallen, Terrie E Taylor, Simon P Harding
Cerebral malaria (CM), a complication of malaria infection, is the cause of the majority of malaria-associated deaths in African children. The standard clinical case definition for CM misclassifies ~25% of patients, but when malarial retinopathy (MR) is added to the clinical case definition, the specificity improves from 61% to 95%. Ocular fundoscopy requires expensive equipment and technical expertise not often available in malaria endemic settings, so we developed an automated software system to analyze retinal color images for MR lesions: retinal whitening, vessel discoloration, and white-centered hemorrhages...
February 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28195092/efficacy-of-in-house-fluorescent-stain-for-fungus
#2
K R L Surya Kirani, V Satya Chandrika
CONTEXT: Mycotic infections are gaining importance in the present day medicine, and definite demonstration of fungus is essential for diagnosis. Small numbers of organisms in the smear can be identified by fluorescence microscopy. Calcofluor white (CFW) fluorescent stain is a textile brightener mixed with Evans blue. It is expensive and not easily available. AIMS: (1) To assess the efficacy of in-house CFW fluorescent stain for fungus in relation to conventional CFW stain, histopathology, and culture...
January 2017: Indian Journal of Pathology & Microbiology
https://www.readbyqxmd.com/read/28182699/bifunctional-effects-of-o-methylated-flavones-from-scutellaria-baicalensis-georgi-on-melanocytes-inhibition-of-melanin-production-and-intracellular-melanosome-transport
#3
Michiko Kudo, Kumiko Kobayashi-Nakamura, Kentaro Tsuji-Naito
The growing interest in skin lightening has recently renewed attention on the esthetic applications of Chinese herbal medicine. Although Scutellaria baicalensis Georgi is used for antipyretic and antiinflammatory purposes, its whitening effect remains unclear. This study reports three major findings: (1) S. baicalensis has a potent inhibitory effect on melanogenesis; (2) wogonin and its glycoside are the active components of S. baicalensis; and (3) O-methylated flavones from S. baicalensis, such as wogonin, inhibit intracellular melanosome transport...
2017: PloS One
https://www.readbyqxmd.com/read/28171684/socially-transmitted-diffusion-of-a-novel-behavior-from-subordinate-chimpanzees
#4
Stuart K Watson, Lisa A Reamer, Mary Catherine Mareno, Gillian Vale, Rachel A Harrison, Susan P Lambeth, Steven J Schapiro, Andrew Whiten
Chimpanzees (Pan troglodytes) demonstrate much cultural diversity in the wild, yet a majority of novel behaviors do not become group-wide traditions. Since many such novel behaviors are introduced by low-ranking individuals, a bias toward copying dominant individuals ("rank-bias") has been proposed as an explanation for their limited diffusion. Previous experimental work showed that chimpanzees (Pan troglodytes) preferentially copy dominant over low-rank models. We investigated whether low ranking individuals may nevertheless successfully seed a beneficial behavior as a tradition if there are no "competing" models...
February 7, 2017: American Journal of Primatology
https://www.readbyqxmd.com/read/28168568/purtscher-like-retinopathy-associated-with-squamous-cell-carcinoma-of-the-cervix
#5
Darren Shu Jeng Ting, Jonathan Smith, Stephen James Talks
PURPOSE: To describe a previously unreported case of Purtscher-like retinopathy secondary to severe acute renal failure associated with squamous cell carcinoma of the cervix. METHODS: This is a case report. RESULTS: A 31-year-old female presented with a week history of acute abdominal pain, vomiting and severe renal failure followed by a sudden onset of bilateral visual loss. Vision was hand movement in either eye with central scotoma. Ophthalmic examination demonstrated bilateral retinal thickening and whitening with intraretinal hemorrhages localized to the peripapillary area, consistent with the diagnosis of Purtscher-like retinopathy...
February 6, 2017: International Ophthalmology
https://www.readbyqxmd.com/read/28165370/plumbagin-suppresses-%C3%AE-msh-induced-melanogenesis-in-b16f10-mouse-melanoma-cells-by-inhibiting-tyrosinase-activity
#6
Taek-In Oh, Jeong-Mi Yun, Eun-Ji Park, Young-Seon Kim, Yoon-Mi Lee, Ji-Hong Lim
Recent studies have shown that plumbagin has anti-inflammatory, anti-allergic, antibacterial, and anti-cancer activities; however, it has not yet been shown whether plumbagin suppresses alpha-melanocyte stimulating hormone (α-MSH)-induced melanin synthesis to prevent hyperpigmentation. In this study, we demonstrated that plumbagin significantly suppresses α-MSH-stimulated melanin synthesis in B16F10 mouse melanoma cells. To understand the inhibitory mechanism of plumbagin on melanin synthesis, we performed cellular or cell-free tyrosinase activity assays and analyzed melanogenesis-related gene expression...
February 3, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28165285/lactoferrin-inhibits-melanogenesis-by-down-regulating-mitf-in-melanoma-cells-and-normal-melanocytes
#7
Nanase Ishii, Mizuyuki Ryu, Yasushi A Suzuki
The aim of this study was to evaluate the effect of bovine lactoferrin (bLf) on melanin-producing cells and to elucidate its mechanism of action. We tested the anti-melanogenic effect of bLf on a 3-dimensional cultured pigmentation skin model and confirmed a 20% reduction in pigmentation, suggesting that bLf was transdermally absorbed and it suppressed melanin production. Treatment of human melanoma cells with bLf resulted in a significant, dose-dependent suppression of melanin production. Apo-bLf and holo-bLf suppressed melanogenesis to the same degree as bLf...
February 2017: Biochemistry and Cell Biology, Biochimie et Biologie Cellulaire
https://www.readbyqxmd.com/read/28159522/a-unique-strategy-for-lung-isolation-during-tracheobronchoplasty
#8
Sam McLaurin, George B Whitener, Toby Steinburg, Alan Finley, Timothy Heinke, Eric Nelson, G J Guldan Iii, Jacob Klapper, Peter Slinger, James H Abernathy
No abstract text is available yet for this article.
November 22, 2016: Journal of Cardiothoracic and Vascular Anesthesia
https://www.readbyqxmd.com/read/28157418/whitening-efficacy-of-whitening-mouth-rinses-used-alone-or-in-conjunction-with-carbamide-peroxide-home-whitening
#9
Jbs Oliveira, R S Sarlo, E Bresciani, Tmf Caneppele
OBJECTIVES: The aim of this study was to compare the effectiveness of whitening mouth rinses on teeth previously whitened or not, exposed to food dyes. METHODS AND MATERIALS: One hundred twenty enamel-dentin specimens, 3 mm in diameter, were obtained from bovine incisors. The specimens were stained for 14 days in staining broth. After staining, the initial color reading was performed via a spectrophotometer CM-2600d (Konica Minolta). Half of specimens were submitted to whitening (10% carbamide peroxide [CP]) for 14 days...
February 3, 2017: Operative Dentistry
https://www.readbyqxmd.com/read/28149472/effect-of-tooth-bleaching-on-the-carbonate-concentration-in-dental-enamel-by-raman-spectroscopy
#10
Tatiana Vargas-Koudriavtsev, Óscar-Andrey Herrera-Sancho
BACKGROUND: There are not many studies evaluating the effects of surface treatments at the molecular level. The aim of this in vitro study was to analyze the concentration of carbonate molecules in dental enamel by Raman spectroscopy after the application of in-office and home whitening agents. MATERIAL AND METHODS: Sixty human teeth were randomly divided into six groups and exposed to three different home bleaching gels (Day White) and three in-office whitening agents (Zoom! Whitespeed and PolaOffice) according to the manufacturer´s instructions...
January 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28149462/effect-of-bleaching-agents-on-enamel-surface-of-bovine-teeth-a-sem-study
#11
Ana-Cristina Pimenta-Dutra, Rodrigo-de Castro Albuquerque, Luís-Fernando-Dos Santos-Alves Morgan, Geraldo-Magela Pereira, Eduardo Nunes, Martinho-Campolina-Rebello Horta, Frank-Ferreira Silveira
BACKGROUND: This study aimed to evaluate changes in the enamel surface of bovine teeth after whitening with exogenous bleaching agents: 10% carbamide peroxide (group 1), 16% carbamide peroxide (group 2) and 35% hydrogen peroxide activated by a light-emitting diode (LED) (group 3). The evaluations were performed by scanning electron microscopy (SEM). MATERIAL AND METHODS: Ninety bovine teeth were divided into five groups (n = 18). The bleaching agents 10% and 16% carbamide peroxide were applied for eight hours a day for 14 consecutive days...
January 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28147557/estimating-and-removing-colorations-from-the-deconvolved-impulse-response-of-an-underwater-acoustic-channel
#12
Kay L Gemba, Eva-Marie Nosal, Todd R Reed
The impulse response (IR) of an acoustic channel can be obtained by cross-correlating the received signal with the broadband excitation signal in unfavorable noise conditions. However, the deconvolved IR is colored by the IRs of the combined electrical equipment. This letter presents a time domain approach using pre-computed filters to whiten the unknown coloration in order to obtain the channel's time domain waveform. The method is validated with an image-source model and the IR of the channel is recovered with spectral root mean square error of -27 dB...
January 2017: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/28133514/anti-melanogenic-effect-of-oenothera-laciniata-methanol-extract-in-melan-a-cells
#13
Su Eun Kim, Chae Myoung Lee, Young Chul Kim
We evaluated the antioxidant activity and anti-melanogenic effects of Oenothera laciniata methanol extract (OLME) in vitro by using melan-a cells. The total polyphenol and flavonoid content of OLME was 66.3 and 19.0 mg/g, respectively. The electron-donating ability, 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) radical-scavenging activity, and superoxide dismutase (SOD)-like activity of OLME (500 μg/mL) were 94.5%, 95.6%, and 63.6%, respectively. OLME and arbutin treatment at 50 μg/mL significantly decreased melanin content by 35...
January 2017: Toxicological Research
https://www.readbyqxmd.com/read/28132436/the-potent-pro-oxidant-activity-of-rhododendrol-eumelanin-induces-cysteine-depletion-in-b16-melanoma-cells
#14
Shosuke Ito, Masae Okura, Kazumasa Wakamatsu, Toshiharu Yamashita
RS-4-(4-Hydroxyphenyl)-2-butanol (rhododendrol, RD), a skin-whitening agent, is known to induce leukoderma in some people. To explore the mechanism underlying this effect, we previously showed that the oxidation of RD with mushroom or human tyrosinase produces cytotoxic quinone oxidation products. We then examined the metabolism of RD in B16F1 melanoma cells in vitro and detected RD-pheomelanin and RD-quinone bound to non-protein and protein thiols. In this study, we examined the changes in glutathione (GSH) and cysteine in B16 cells exposed to RD for up to 24 h...
January 2017: Pigment Cell & Melanoma Research
https://www.readbyqxmd.com/read/28129295/asymptomatic-infection-in-decompensated-full-thickness-corneal-grafts-referred-for-repeat-penetrating-keratoplasty
#15
Yoav Nahum, Pia Leon, Benedetta Azzurra Ricci-Filipovic, Davide Camposampiero, Diego Ponzin, Massimo Busin
PURPOSE: We report a case series of asymptomatic infections affecting failed corneal grafts in patients referred for repeat penetrating keratoplasty (PK). METHODS: In this retrospective, noncomparative, interventional case series, we reviewed the medical records of all repeat PK procedures performed at Villa Serena-Villa Igea private Hospitals (Forlì, Italy) between January 2011 and March 2016. Specifically, preoperative and postoperative slit-lamp examinations, and the results of histological and bacteriological examinations, were noted...
January 26, 2017: Cornea
https://www.readbyqxmd.com/read/28127316/in-vitro-evaluation-of-the-effect-of-herbal-antioxidants-on-shear-bond-strength-of-composite-resin-to-bleached-enamel
#16
Zahra Khamverdi, Parvin Khadem, Aliraza Soltanian, Maryam Azizi
OBJECTIVES: A reduction in bond strength of composite to bleached enamel has been reported immediately after bleaching treatment. Application of some antioxidant agents may decrease the adverse effects of whitening agents on bond strength and enhance composite bond to enamel. This study aimed to assess the effect of green tea, sodium ascorbate, sage and grape seed extract on bond strength of composite to bleached enamel. MATERIALS AND METHODS: In this in-vitro study, 90 human enamel surfaces were randomly divided into six groups as follows (n=15): G1, no bleaching; G2, bleaching with 40% hydrogen peroxide (HP); G3, HP+1000 μmol epigallocatechin gallate (EGCG) for 10 minutes; G4, HP+10% sodium ascorbate for 10 minutes; G5, HP+10% sage for 10 minutes and G6, HP+5% grape seed extract for 10 minutes...
August 2016: Journal of Dentistry of Tehran University of Medical Sciences
https://www.readbyqxmd.com/read/28116437/-study-of-the-effect-of-fluoride-removal-agent-and-microabrasion-technology-in-led-teeth-whitening-of-dental-fluorosis
#17
Yan Jia, Rong Zhang, Hong-Xia Luo, Ping Li, Chun-Lei Zhang
PURPOSE: To evaluate the effect of fluoride removal agent and microabrasion technology in LED teeth whitening of dental fluorosis. METHODS: One hundred and twelve patients with moderate dental fluorosis treated from August 2012 to July 2015 were divided into experimental group and control group according to random number table, with 61 cases in each group. In addition to pretreatment for all patients, patients in the control group were given combined treatment of Beyond LED whitening and fluoride removal agent; while patients in the experimental group were given microabrasion before LED whitening, with the same subsequent treatment process as that in the control group...
October 2016: Shanghai Kou Qiang Yi Xue, Shanghai Journal of Stomatology
https://www.readbyqxmd.com/read/28115089/generation-of-hydroxyl-radicals-and-effective-whitening-of-cotton-fabrics-by-h2o2-under-uvb-irradiation
#18
Peixin Tang, Gang Sun
Chemically crosslinked cotton fabrics may show yellowish appearance, especially citric acid (CA) crosslinked ones. Hydrogen peroxide (H2O2) bleaching under alkaline condition could improve the whiteness of the CA-crosslinked cotton fabrics but sacrificing certain crosslinking performance of the products due to alkaline hydrolysis of ester connections. Regular H2O2 and UV irradiation (H2O2/UV) system can destroy color but also damage fibers due to the use of very short wavelength of UVC such as 254nm or shorter...
March 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28114924/n-4-methoxyphenyl-caffeamide-induced-melanogenesis-inhibition-mechanisms
#19
Yueh-Hsiung Kuo, Chien-Chia Chen, Po-Yuan Wu, Chin-Sheng Wu, Ping-Jyun Sung, Chien-Yih Lin, Hsiu-Mei Chiang
BACKGROUND: The derivative of caffeamide exhibits antioxidant and antityrosinase activity. The activity and mechanism of N-(4-methoxyphenyl) caffeamide (K36E) on melanogenesis was investigated. METHODS: B16F0 cells were treated with various concentrations of K36E; the melanin contents and related signal transduction were studied. Western blotting assay was applied to determine the protein expression, and spectrophotometry was performed to identify the tyrosinase activity and melanin content...
January 23, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/28114059/improving-large-scale-image-retrieval-through-robust-aggregation-of-local-descriptors
#20
Syed Sameed Husain, Miroslaw Bober
Visual search and image retrieval underpin numerous applications, however the task is still challenging predominantly due to the variability of object appearance and ever increasing size of the databases, often exceeding billions of images. Prior art methods rely on aggregation of local scale-invariant descriptors, such as SIFT, via mechanisms including Bag of Visual Words (BoW), Vector of Locally Aggregated Descriptors (VLAD) and Fisher Vectors (FV). However, their performance is still short of what is required...
September 27, 2016: IEEE Transactions on Pattern Analysis and Machine Intelligence
keyword
keyword
36781
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"