Mimi

Mimi may refer to:

People

Places

Arts and entertainment

Businesses

Other uses

Eye

Eyes are the organs of vision. They detect light and convert it into electro-chemical impulses in neurons. In higher organisms, the eye is a complex optical system which collects light from the surrounding environment, regulates its intensity through a diaphragm, focuses it through an adjustable assembly of lenses to form an image, converts this image into a set of electrical signals, and transmits these signals to the brain through complex neural pathways that connect the eye via the optic nerve to the visual cortex and other areas of the brain. Eyes with resolving power have come in ten fundamentally different forms, and 96% of animal species possess a complex optical system. Image-resolving eyes are present in molluscs, chordates and arthropods.

The simplest "eyes", such as those in microorganisms, do nothing but detect whether the surroundings are light or dark, which is sufficient for the entrainment of circadian rhythms. From more complex eyes, retinal photosensitive ganglion cells send signals along the retinohypothalamic tract to the suprachiasmatic nuclei to effect circadian adjustment and to the pretectal area to control the pupillary light reflex.

Combustion

Combustion /kəmˈbʌs.tʃən/ or burning is a high-temperature exothermic redox chemical reaction between a fuel and an oxidant, usually atmospheric oxygen, that produces oxidized, often gaseous products, in a mixture termed as smoke. Combustion in a fire produces a flame, and the heat produced can make combustion self-sustaining. Combustion is often a complicated sequence of elementary radical reactions. Solid fuels, such as wood, first undergo endothermic pyrolysis to produce gaseous fuels whose combustion then supplies the heat required to produce more of them. Combustion is often hot enough that light in the form of either glowing or a flame is produced. A simple example can be seen in the combustion of hydrogen and oxygen into water vapor, a reaction commonly used to fuel rocket engines. This reaction releases 242 kJ/mol of heat and reduces the enthalpy accordingly (at constant temperature and pressure):

Combustion of an organic fuel in air is always exothermic because the double bond in O₂ is much weaker than other double bonds or pairs of single bonds, and therefore the formation of the stronger bonds in the combustion products CO₂ and H₂O results in the release of energy. The bond energies in the fuel play only a minor role, since they are similar to those in the combustion products; e.g., the sum of the bond energies of CH₄ is nearly the same as that of CO₂. The heat of combustion is approximately -418 kJ per mole of O₂ used up in the combustion reaction, and can be estimated from the elemental composition of the fuel.

Mark Collins

Mark Collins may refer to:

Jimmy Fallon

James Thomas "Jimmy" Fallon (born September 19, 1974) is an American comedian, television host, actor, singer, writer, and producer. He is known for his work in television as a cast member on Saturday Night Live and as the host of late-night talk show The Tonight Show Starring Jimmy Fallon. He was born in Bay Ridge, Brooklyn and raised in Saugerties, New York. He grew up with an interest in comedy and music, moving to Los Angeles at 21 to pursue stand-up opportunities.

He was commissioned to join NBC's Saturday Night Live as a cast member in 1998, fulfilling a lifelong dream. Fallon remained on SNL for six years between 1998 and 2004, co-hosting the program's Weekend Update segment and becoming a celebrity in the process. He left the program for the film industry, starring in films such as Taxi (2004) and Fever Pitch (2005). Following his film career, Fallon returned to television as the host of Late Night with Jimmy Fallon on NBC in 2009, where he became well known for his emphasis on music and games. He transitioned from that program to become the sixth host of the long-running The Tonight Show in 2014.