Pigments

The milkmaid is an oil on canvas of 45.5 x 41 cm by the famous Dutch painter Johannes Vermeer. The maid is standing in a plain scullery-type room carefully pouring milk into an earthenware container sitting on a small table next to a still life arrangement of stale bread pieces and a full bread basket. From the way that the maid dresses up, I think The Milkmaid prescribes a woman in the middle class. The artist uses almost all implied lines. Taking the face of the milkmaid as a starting point,

“Room 200” Along the Little Miami river lays an unincorporated community called Kings Mills, Ohio. To put it into perspective this community lies less than a mile east of Kings Island, the renowned amusement park. Kings Mills is home to many urban legends, spook stories, and haunts. Many of which can be googled however, this one cannot. Kings Mills Middle school can be found in this little community and it is where my urban legend takes place. This school housed 5th, 6th and 7th grades where

a) Li and colleagues most likely chose this case report to publish in order to draw attention to the importance of proper procedure when administering phenol for tattoo removal. This particular case is an example of phenol being administered without any health precautions being taken before, during, or after the procedure, such as intravenous hydration (Li et al. 2016). The ramifications of not following proper medical procedure when using phenol are clear in this case study, as the individual suffered

The purpose of this experiment was to prepare azo dyes using the combinatorial approach to show the principles combinatorial chemistry. Using combinatorial synthesis, an array of chemicals can be synthesized by using a parallel synthesis to identify potentially valuable compounds. This electrophilic aromatic substitution reaction involved multiple steps to complete, however, no major techniques were used; only the use of a hot place and an ice bath. The specific azo dyes produced in this experiment

Lapis Lazuli is a kind of a precious blue stone. (Marc 1998) Lapis Lazuli referred to in this poem was given to Yeats on his seventieth birthday (as a present) by Mr. Harry Clifton. In this essay I am going to critically analyse this poem in relation to its context. This means that in relation to time and place. I will then conclude by commenting on the language aspects and give an account as to why he chose to use certain conventions and words. In discussing the relationship between art and politics

A major factor in the ability in such paintings is the sheer amount of material required. Paint is just pigments suspended in a medium such as oil, tempera, or just plain water. Before the 19th century, mass production of paints was not a feasible thing. Synthesis of pigments could be an arduous, or even fatal process, because of the rarity, or toxicity of the compounds needed. The pigments used were generally difficult to acquire, for example ultramarine, a deep blue color is made of a gemstone

The retinal pigment epithelium (RPE), lying between the photoreceptors and the choriocapillaris, is a monolayer of pigmented cells which plays essential roles in the retina, including maintaining the overlying photoreceptors, mediating the uptake of nutrients, ions and water, phagocytosing shed photoreceptor outer segment, and more. Several retinal degenerative diseases, including age-related macular degeneration (AMD), are closely related with RPE dysfunction (Strauss, 2005). Although the exact

AMD is the leading cause of blindness in the elderly population, which was estimated to affect around 200 million people worldwide in 2020[1] and places vast socioeconomic burden. Degeneration of retinal pigment epithelium (RPE) is believed to play central roles in AMD pathogenesis. RPE is a monolayer of highly pigmented cuboidal cells residing between the photoreceptors (PRs) and Bruch’s membrane. One RPE cell serves around thirty photoreceptors in terms of supporting the visual cycle and phagocytosis

Photosynthetic pigments Introduction Some animals and most plants use photosynthesis to convert light energy into chemical energy. The energy that is created can be stored and is accessed later on by consumers. The consumers of the organisms break bonds while digesting the plant material and the stored energy is released into their perspective systems. The entire process of photosynthesis can be summarized as carbon dioxide and water reacting with light to create sugar, water and oxygen. Although

There are two major types of pigments that are involved in photosynthesis for plants: carotenoids and chlorophylls. Under carotenoids, there are pigments called α and β-carotene and xanthophylls. Chlorophylls include chlorophyll a and chlorophyll b (Pavia et al 208). The main objective of this experiment was to extract these pigments from spinach leaves using chromatography techniques. First, the pigment was extracted from the leaves by column chromatography. However, the column was packed with granular