منابع مشابه
Programming balanced optical beam splitters in white paint.
Wavefront shaping allows for ultimate control of light propagation in multiple-scattering media by adaptive manipulation of incident waves. We shine two separate wavefront-shaped beams on a layer of dry white paint to create two enhanced output spots of equal intensity. We experimentally confirm by interference measurements that the output spots are almost correlated like the two outputs of an ...
متن کاملEarly white discoloration of infantile hemangioma: a sign of impending ulceration.
OBJECTIVE To evaluate the relationship between early white discoloration of infantile hemangioma (IH) and ulceration. DESIGN Retrospective cohort study. SETTING Tertiary referral center. PATIENTS A case series of 11 infants with early white discoloration of IH are described. An additional 55 infants with IH, aged 3 months, were evaluated retrospectively from a photograph archive to furthe...
متن کاملTreatment of tooth discoloration after the use of white mineral trioxide aggregate.
INTRODUCTION A number of vital pulp therapy techniques have been recommended to preserve pulp vitality in teeth with complicated crown fractures, especially in young patients. Calcium hydroxide has been the gold standard as a pulp capping material, but recently mineral trioxide aggregate (MTA) has been recommended. This case report describes the treatment of tooth discoloration caused by white ...
متن کاملMechanism of Surface White Discoloration of Peeled (Minimally Processed) Carrots During Storage
A proposed mechanism of white discoloration development on peeled carrots included both physical and physiological responses to wounding. The physical response is a color change due to reversible surface dehydration. This study was performed at 2.5 and 10°C using a mode1 system controlling relative humidity, at 33, 75 or 98%, and a commercial system with low-density polyethylene (LDPE) plastic ...
متن کاملHygroscopic Coatings Control Surface White Discoloration of Peeled (Minimally Processed) Carrots During Storage
White discoloration on peeled carrots is partially due to surface dehydration which can be controlled with hygroscopic coatings: e.g., polyhydric alcohols and salt solutions. This study was performed at 2.5, 7.5, 10, and 157C, using a model system controlling relative humidity at 33, 75 or 98% or a commercial system with low-density polyethylene (LDPE) plastic film bags. The moisture sorption p...
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ژورنال
عنوان ژورنال: Scientific American
سال: 1919
ISSN: 0036-8733
DOI: 10.1038/scientificamerican02081919-91asupp