Monday, January 28, 2008

Dye-transfer process

The dye transfer progression is a continuous-tone color photographic printing process, popularized by the Eastman Kodak Company in the 1940s. It is sometimes referred to by such general names as wash-off relief printing and dye imbibition’s transfer printing. The process involves making three matrices for each color, which absorb dye in quantity to the density of the relief. A color print is shaped, by transferring the dyed film matrices in physical contact onto a mordant dye receiver paper. Eastman Kodak Company congested making materials for this process in the mid 1990s. The dyes used in the process are very spectrally pure compare to normal coupler induced photographic dyes, with the immunity of the Kodak cyan. Also the dyes have exceptional light and dark fastness. The dye transfer process possesses the major color gamut and tonal scale than any other process, including inkjet. Another important characteristic of dye move is it allows the practitioner the highest degree of photographic control compare to any other photochemical color print process.

Monday, January 21, 2008


In finance, a debenture is a long-term debt instrument used by governments and large companies to get funds. It is similar to a bond apart from the securitization conditions are different. A debenture is frequently unsecured in the sense that there are no liens or pledges on specific assets. It is however, secured by all property not otherwise pledged. In the case of insolvency debenture holders are considered general creditors.
The advantage of debentures to the issuer is they leave specific assets imaginative, and thereby leave them open for subsequent financing. Debentures are generally freely transferable by the debenture holder.

Wednesday, January 16, 2008

Cricket ball

Cricket balls are made from a core of cork, which is coated with tightly wound string, and covered by a leather case with a slightly raised sewn seam. The covering is constructed of four piece of leather shaped similar to the peel of a quartered orange, but one hemisphere is rotated by 90 degrees with respect to the other. The "equator" of the ball is stitch with string to form the seam, with a total of six rows of stitches. The remaining two join connecting with the leather pieces are left unstitched.For men's cricket, the ball must weigh between 5.5 and 5.75 ounces (155.9 and 163.0 g) and determine between 8 13/16 and 9 in (224 and 229 mm) in circumference. Balls used in women's and youth matches are a little smaller.

Monday, January 07, 2008

Cast iron

Cast iron usually refers to grey cast iron, but can mean any of a group of iron-based alloys containing more than 2% carbon. It is made by remelting pig iron, often along with substantial quantities of scrap iron and scrap steel, and taking various steps to remove undesirable contaminants such as phosphorus and sulfur. Carbon and silicon content are reduced to the desired levels, which may be anywhere from 2% to 3.5% for carbon and 1% to 3% for silicon depending on the application. Other elements are then added to the melt before the final form is produced by casting.Iron is most commonly melted in a small blast furnace known as a cupola. After melting is complete, the molten iron is removed or ladled from the forehearth of the blast furnace. This process is thought to have been devised by the late 18th century ironmaster John Wilkinson, whose innovative ideas revolutionized the field of metallurgy. Previously, iron was melted in an air furnace, which is a type of reverberatory furnace.

Thursday, January 03, 2008

Biological synthesis

Natural polymers and biopolymers formed in living cells may be synthesized by enzyme-mediated processes, such as the arrangement of DNA catalyzed by DNA polymerase. The synthesis of proteins involves multiple enzyme-mediated processes to transcribe genetic information from the DNA and subsequently translate that information to synthesize the particular protein. The protein may be personalized further following translation in order to provide appropriate structure and function.