Protochlorophyllide (Pchlide) is a natural porphyrin, a precursor of chlorophyll, synthesized by plants for its photosynthetic apparatus. The pigment spontaneously forms aggregates when dissolved in neat water solution. We present here calculations of the transient absorption spectra and its comprising components (ground-state bleach, stimulated emission, and excited-state absorption) for a str...

Skin disease is common among migrant Latino farmworkers. These workers rarely use formal health care services but commonly engage in self-treatment of their skin disease. We present a patient with dermatitis who self-treated with bleach. This patient illustrates a common practice that exacerbates skin disease and sheds light on social and cultural factors of which health care providers serving ...

The time course of rod dark adaptation was measured in 12 patients and carriers of retinitis pigmentosa (RP). In contrast to previous studies the rod absolute threshold was determined prior to any exposure to the bleaching light. For seven of the patients and carriers the recovery of rod sensitivity to the prebleach level was prolonged, with the delay ranging from mild to severe. The prolongati...

INTRODUCTION This study was designed to assess the effect of two bleaching agents on the disintegration tendency of three types of glass ionomers. MATERIALS AND METHODS A total of 90 specimens were prepared by using a split Teflon ring with an internal diameter of 5 mm and a thickness of 2 mm. The tested materials were applied and bleached according to manufacturer's instructions. Dissolution...

Hair dyes are more and more used and the role of the exposure to these products in the development of skin reactions in the exposed region is suspected. The aim of this study is to assess the effects of hair dyes on facial skin and scalp sensitivity by performing a Computer Assisted Web Interview on 1257 women older than 15 years old. Differences were observed in the scores evaluating facial sk...

Nutrient loading is one of the strongest drivers of marine habitat degradation. Yet, the link between nutrients and disease epizootics in marine organisms is often tenuous and supported only by correlative data. Here, we present experimental evidence that chronic nutrient exposure leads to increases in both disease prevalence and severity and coral bleaching in scleractinian corals, the major h...

In this study, we investigated the “heat phantom sensation” induced by thermal stimulation of two points. Phantom sensations are tactile illusions induced at a point between two or more stimuli, and have been demonstrated to occur in the event of vibration stimulation. However, their induction by thermal stimuli has not been fully investigated. We confirmed the existence of a heat phantom sensa...

We would like to thank Kim et al. for appreciating the importance of our work [1]. It should be noted that the introduction of a disk shaped heat pipe by us in the cited paper was done for the very first time in the literature and our comprehensive analytical results for the disk-shaped and rectangular-shaped heat pipes constitute the very first such analysis in the literature. In summary, we a...

A bow with horse tail hair is used to play the violin. New and worn-out bow hairs were observed by atomic force microscopy. The cuticles of the new bow hair were already damaged by bleach and delipidation, however the worn-out bow hairs were much more damaged and broken off by force, which relates to wearing out.

The excited state dynamics in polycrystalline thin films of tetracene are studied using both picosecond fluorescence and femtosecond transient absorption. The solid-state results are compared with those obtained for monomeric tetracene in dilute solution. The room temperature solid-state fluorescence decays are consistent with earlier models that take into account exciton-exciton annihilation a...