A 75-year-old man presented to us with sudden onset of profound vision loss in his right eye and was identified as suffering from an ophthalmic artery occlusion. Apart from the retinal whitening and box-carring of the retinal arteries, there were characteristic triangular patches of retinal whitening in the midperipheral temporal fundus indicating a previous lateral posterior choroidal artery o...

OBJECTIVE The purpose of this 14-day parallel, double blind clinical trial was to evaluate the tooth whitening efficacy of a 9% hydrogen peroxide gel (Colgate Visible White) relative to a 20% carbamide peroxide gel (Opalescence) positive control. METHODS Forty-six consenting adults were randomly assigned to use one of the two products. All participants had 6 unrestored maxillary anterior teet...

BACKGROUND This study investigated the effects of sodium bicarbonate (NaHCO3) combined with 1.5% hydrogen peroxide (H2O2) and casein phosphopeptide amorphous calcium phosphate fluoride (CPP-ACPF) on color and microhardness of enamel. MATERIAL AND METHODS Seventy-five bovine incisors were immersed in a tea solution for 7.5 days. The specimens were randomly divided into five groups according to...

BACKGROUND Bacteria associated with marine invertebrates are a rich source of bioactive metabolites. OBJECTIVE The effects of marine bacteria extracts on pigmentation were investigated to find novel whitening agents. METHODS The marine bacteria collected near Gangwha Island in Korea were isolated and extracted using organic solvent. The organic extracts were screened and selected using the ...

AIM To investigate whether retinal changes in children with severe malaria affect visual acuity 1 month after systemic recovery. METHODS All children with severe malaria admitted to a research ward in Malawi during one malaria season were examined by direct and indirect ophthalmoscopy. Visual acuity was tested in those attending follow up by Cardiff cards, Sheridan-Gardiner single letters, or...

The examination of racial classification in Brazil reveals the popularity of the ambiguous moreno and the affirmative negro terms, both non-census terms. Using national survey data, we examine propensities to classify under either of these terms and how educational level, age, sex and local racial composition structure their choice. We find, for example, that low education is positively correla...

Abstract In the Philippines and other developing countries, the skin whitening industry is prolific and expanding among native populations. However, this desire for white skin has dire health repercussions, both physical and psychological. Many researchers in the field of Filipino-American psychology attribute this desire for whiter skin to the American colonial rule of the Philippines, which b...

The gradual “whitening” of Puerto Rico over the course of the twentieth century is often noted in scholarly, journalistic, and popular descriptions of the island’s population. In 1899, a year after Puerto Rico came under U.S. dominion, the census reported that 62 percent of the population was white; by the year 2000, according to official census results, the white proportion of the Puerto Rican...

The effect of onion juice on the whitening fresh-cut carrots during storage was explored to optimize processing technology carrots. Using fresh carrot and as raw materials whiteness value reference index, process parameters were optimized by response surface methodology (RSM) based single factor experiment, physiological biochemical indexes determined. Results showed that conditions follows: co...

OBJECTIVE To determine the effects of whitening strips on bovine dentin fatigue resistance and flexural strength in vitro. MATERIALS AND METHODS A total of eighty bovine dentin specimens (2x2x17mm) were treated with either: control glycerine gel on plastic film wrap or whitening strips containing 9.5% hydrogen peroxide. Treatment was applied for 30 minutes, twice a day, for 1- or 4-weeks. Aft...