Category: S
-
Sitotoxism
Poisoning by vegetable foods infested with molds or bacteria.
-
Sitotoxin
Any poison developed in food, especially one produced by bacteria growing in a cereal or grain product.
-
Sitotherapy
The therapeutic use of diet and nutrition. “Therapeutic Nutrition” or “Healing through Dietary Adjustments.”
-
Sitosterols
A group of similar organic compounds that occur in plants. They contain the steroid nucleus, perhydrocyclopentanophenanthrene.
-
Site-specific
Properties of cellular receptors that vary with their body location or milieu.
-
Splice site
The location on a strand of messenger RNA where the molecule can be cut and reannealed during the regulation of protein synthesis by cells.
-
Sister Mary Joseph nodule
A hard, periumbilical lymph node sometimes present when pelvic or gastrointestinal tumors have metastasized.
-
Sirtuins
Any of a class of proteins that deacylate histones and keep chromatin from being transcribed. Also known as Sir proteins, members of this class of chemicals may contribute to longevity.
-
Siphonaptera
An order of insects commonly called fleas. They are wingless, undergo complete metamorphosis, and have piercing and sucking mouth parts. The body is compressed laterally, and the legs are adapted for leaping. Fleas feed on the blood of birds and mammals. They transmit the causative organisms of several diseases (bubonic plague, endemic or murine typhus,…
-
Siphon
A tube bent at an angle to form two unequal lengths for transferring liquids from one container to another by atmospheric pressure. One container must be higher than the other for this to work.