Lastly, parietal cells synthesizedand secrete intrinsic factor which aids in the absorption of vitamin B12 by the ileum. Chief cells (B or arrow)are located, in cluster, at the base of the glands. They synthesize and secret hydrolytic enzymes, which areactivated at acid pH. These enzymes include gastric lipase, rennin and pepsin, which is secreted aspepsinogen and activated in the lumen. Pepsin hydrolyzes proteins. Rennin breaks down milk proteins andlipase initiates the digestion of fats.
A basis set in theoretical and computational chemistry is a set of functions (called basis functions) which are combined in linear combinations (generally as part of a quantum chemical calculation) to create molecular orbitals.
A logistic function or logistic curve is a common S shape (sigmoid curve), with equation: where e = the natural logarithm base (also known as Euler's number), x 0 = the x-value of the sigmoid's midpoint,L = the curve's maximum value, and.k = the steepness of the curve. For values of x in the range of real numbers from ââ to +â, the S-curve shown on the right is obtained (with the graph of f approaching L as x approaches +â and approaching zero as x approaches ââ).The function was named in 1844â1845 by Pierre Francois FranÃ§ois, verhulst who studied it in relation to population. growthhe logistic function is the inverse of the natural logit function and so can be used to convert the logarithm of odds into a probability. In mathematicaly notation the logistic function is sometimes written as expit in the same form as logit.