Present evidence suggests that in the small intestine, villus cells are primarily absorptive and crypt cells are primarily secretory. In order to further confirm that there are differences in transport properties between villus and crypt cells, we have separated villus from crypt cells, using calcium chelations techniques, and determined the distribution of Na:H and Cl:HCO3 exchange activity on...

Crypt cells are one of three types of olfactory sensory neuron, differing from ciliated and microvillar cells in shape, localization and number, and found only in fish. Although crypt cells are morphologically well characterized, their function remains unclear. They were hypothesized to be involved in reproductive behaviours by detecting sex pheromones, but electrophysiological investigations r...

On the basis of our investigation of the premalignant crypt phenotype in familial adenomatous polyposis patients, the hypothesis is developed that tumor initiation in the colon is caused by crypt stem cell overproduction. A novel kinetic model for the colonic crypt was used to investigate how the earliest tissue abnormality (altered crypt labeling index) arises in these patients who have a muta...

The ZK-Crypt combination compact hardware stream cipher engines each include a true random number generator, a stream cipher and a data authenticator based on a fast compact engine and proven "noise sources". The ZK-Crypt II 7.0 K gate and ZK-Crypt 8.2 K gate "engines" output a 32 bit word at each clock cycle with 128 and 160-bit keys, maximizing throughput with very low energy per enciphered b...

BACKGROUND AND AIMS Epidermal growth factor (EGF) is a potent mitogen for the gastrointestinal tract and also influences the number of new crypts formed by crypt fission. The time course of these events and possible linkage between these two complementary mechanisms is however poorly understood. We therefore examined the temporal relationship of proliferation and fission in rats treated with EG...

exogenous enzymes such as xylanase can cause recovery of efficiency in poultry. in this study we investigated the effects of xylanase supplementation on small intestine histomorphometry in broilers chicken. two levels of xylanase supplementation (with or without 0.07% xylanase) was used in 4 treatment groups (two repetitions for each group and 15 chicks per group). after 42 days, 10 chicks from...

This paper introduces MD*Crypt as a means of distributing statistical methods and computing power. This paper explores MD*Crypt regarding topics of education. The role of MD*Crypt in projects associated with teaching statistics is examined. In an outlook, the potential of the MD*Serv/MD*Crypt architecture in frameworks of distributed computing and method providing is mentioned.