The red color of fruit is an attractive plant trait for consumers. Plants with color-faded fruit have a lower commercial value, such as 'Red Bartlett' pears (Pyrus communis L.) that have dark-red fruit in the early stages of fruit development that subsequently fade to red-green at maturity. To identify the reason for color fading, we first analyzed the anthocyanin content of peel from 'Red Bart...

Color blindness is deficiency of color vision. Due to presence of color blindness, human eye becomes unable to differentiate colors with each other. Generally reason behind color blindness is genetic but sometimes it happens due to some damage and disorder in brain and eye. Color blindness is of many types like Red-Green, Blue-Yellow etc. Red-Green color blindness is most common type of deficie...

It is estimated that inherited red-green color deficiency, which involves both the protan and deutan deficiency types, is common in men. For red-green defective observers, some reddish colors appear desaturated and brownish, unlike those seen by normal observers. Despite its prevalence, few studies have investigated the effects that red-green color deficiency has on the psychological properties...

In the theoretical section of the present paper, we develop our view of the roles played by the perceptual criteria: indistinguishably equal, neither blue nor yellow, neither green nor red, and heterochromatically equally bright. These criteria constitute a vectorial opponent-colour space, a concept used throughout the paper. Within this framework, two new theorems on psychophysical opponent-co...

In 1930 Amako reported that as cultures of Serratia marcescens grew old their color changed from red to dark violet. He postulated that the change was associated with the pathway of pigment formation in the microorganism. Weiss (1949) observed a similar color change. Colonies growing on agar were orange-red in color at the end of 24 to 48 hr, but as they grew older the color changed to red-purp...

Hummingbird flowers are typically red in color but the reasons for this are not well understood. Relatively few studies have examined hummingbird flower color preferences under natural conditions in which flower color varies within a species. We recorded hummingbird visitation rates to flowers that vary in color from yellow to red in a natural hybrid population between redand yellow-flowered Mi...

Of the 1306 male and 791 female Jat Sikhs of Patiala city and the surrounding villages between the age group 10-60 years, 50 males and one female were found to be having colour blindness, showing an incidence of 3.83% and 0.13% respectively. The study was done with the help if Ishihara Charts and Pickford Nicolson's anomaloscope. The type of colour blindness in males in its descending order of ...

An ecological approach has been obtained by using natural dyes and mordant for dyeing process. Fabrics dyed using myrobalan extract as natural mordants and green dye. A red color were obtained by using theses mordants. The color of dyed fabrics was investigated in CIELab L, a and b and K/S values. Finally, all dyed fabrics were tested for wash and light fastness properties as per ISO standard t...

An ecological approach has been obtained by using natural dyes and mordant for dyeing process. Silk fabrics dyed using natural mordants: powder of sour pomegranate and sweet pomegranate and mixture them. A beautiful red color were obtained by using theses mordants. The color of dyed silk fabrics was investigated in CIE Lab L, a and b and K/S values. Finally, all dyed fabrics were tested for was...

Anthocyanins in grapes. Red wine color is incredibly complex. Any given wine is composed of hundreds of dynamic chemicals that are interacting and changing during the winemaking process. While evolution of color from purple-red to brick red in Vitis vinifera wines is familiar to both winemaking and scientific communities, the color of hybrid wines is less predictable, and often varies from the ...