Arthropod eyes are built of repeating units named ommatidia. Each single ommatidium unit contains a cluster of photoreceptor cells surrounded by support cells and pigment cells. The insect Copium eye ommatidia include additional calcium-phosphate deposits, not described in insects to date, which can be examined today using a combined set of modern microscopy and spectroscopy techniques. Teucriu...

This study was carried out in order to understand the lipid and biochemical alterations resulting from different nutritional regimes of nitrate and phosphate in Ulva lactuca. The algal thalli cultured in artificial seawater (ASW) showed higher levels of carbohydrates and non-polar lipids and increased phosphatase activities, accompanied by degradation of polar lipids, proteins and pigments. Fur...

background and objective: pigment production by microorganisms is important due to more rapid growth, higher efficiency, easier extraction, and antimicrobial effects compared to other methods. the aim of the present study is to isolate and identify antibiotic pigment-producing actinomycetes from the soil of the persian gulf and to evaluate the antibiotic activity of their pigments in the second...

abstract background: transpupillary thermotherapy is a new treatment for subfoveal choroidal neovascularization which needs further evaluation. this study was aimed to evaluate the efficacy of transpupillary thermotherapy on regression of occult subfoveal choroidal neovascularization with or without pigment epithelial detachment in patients with age-related macular degeneration. methods: in a c...

background: there is a growing demand for mass production of shikalkin (a natural pigment consisted of shikonin and alkannin) due to its increasing applications in cosmetics, pharmaceutical and nutrition industries. the root of iranian arnebia euchroma produces shikalkin. the promising capability of this plant for shikalkin production has already been demonstrated in cell culture studies. objec...

sodium bentonite can bind to dietary pigment and decreases yolk color scale. sodium bentonite is one of the main parts of formycine® gold, the effect of different levels of formycine® gold and dietary pigment on egg quality, egg yolk color and performance criteria of laying hens from 26 to 34 week of age were studied. one hundred ninety two hy-line hens were divided into 24 groups of 8 birds ea...

Sodium bentonite can bind to dietary pigment and decreases yolk color scale. Sodium bentonite is one of the main parts of Formycine® Gold, the effect of different levels of Formycine® Gold and dietary pigment on egg quality, egg yolk color and performance criteria of laying hens from 26 to 34 week of age were studied. One hundred ninety two Hy-Line hens were divided into 24 groups of 8 birds ea...

THE pigments present in the blood-serum in jaundice were first differentiated by van den Bergh, who found that, whereas all icteric sera coupled with diazobenzene-p-sulphonic acid (Ehrlich's diazo-reagent) in the presence of alcohol, only certain of these sera would couple in simple aqueous solution. These diazo-reactions van den Bergh termed "indirect" and "direct" respectively, and it is now ...

incontinentia pigmenti (ip) is an x-linked dominant genodermatosis characterized by typical skin lesions along blaschko's lines and associated with ocular, dental, nails, hair, skeletal, central nervous system and cardiovascular anomalies. we report a 5-year-old boy with cutaneous hyperpigmentation along blaschko's lines, atrophic streaks, strabismus and mental retardation. he showed the charac...