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Oligopeptides
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D009842 |
[Peptides composed of between two and twelve amino acids.
] |
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Oligoribonucleotides
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D009843 |
[A group of ribonucleotides (up to 12) in which the phosphate residues of each ribonucleotide act as bridges in forming diester linkages between the ribose moieties.
] |
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Oligoribonucleotides, Antisense
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D020320 |
[Short fragments of RNA that are used to alter the function of target RNAs or DNAs to which they hybridize.
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Oligosaccharides
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D009844 |
[Carbohydrates consisting of between two (DISACCHARIDES) and ten MONOSACCHARIDES connected by either an alpha- or beta-glycosidic link. They are found throughout nature in both the free and bound form.
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Oligosaccharides, Branched-Chain
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D025942 |
[Oligosaccharides containing various types of glycosidic linkages that yield branching or antennae. The number of antennae (such as bi-, tri-, tetra-, or penta-antennary) in the oligosaccharides on the PROTEOGLYCANS; GLYCOPROTEINS; or LIPOPOLYSACCHARIDES contribute to their biological activities, such as receptor binding and metabolism.
] |
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Oligospermia
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D009845 |
[A condition of suboptimal concentration of SPERMATOZOA in the ejaculated SEMEN to ensure successful FERTILIZATION of an OVUM. In humans, oligospermia is defined as a sperm count below 20 million per milliliter semen.
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Oliguria
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D009846 |
[Decreased URINE output that is below the normal range. Oliguria can be defined as urine output of less than or equal to 0.5 or 1 ml/kg/hr depending on the age.
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Olivary Nucleus
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D009847 |
[A part of the MEDULLA OBLONGATA situated in the olivary body. It is involved with motor control and is a major source of sensory input to the CEREBELLUM.
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Olive Oil
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D000069463 |
[Oil extracted from fruit of the OLIVE TREE (genus Olea).
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Olivomycins
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D009848 |
[A mixture of several closely related glycosidic antibiotics obtained from Actinomyces (or Streptomyces) olivoreticuli. They are used as fluorescent dyes that bind to DNA and prevent both RNA and protein synthesis and are also used as antineoplastic agents.
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Olivopontocerebellar Atrophies
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D009849 |
[A group of inherited and sporadic disorders which share progressive ataxia in combination with atrophy of the CEREBELLUM; PONS; and inferior olivary nuclei. Additional clinical features may include MUSCLE RIGIDITY; NYSTAGMUS, PATHOLOGIC; RETINAL DEGENERATION; MUSCLE SPASTICITY; DEMENTIA; URINARY INCONTINENCE; and OPHTHALMOPLEGIA. The familial form has an earlier onset (second decade) and may feature spinal cord atrophy. The sporadic form tends to present in the fifth or sixth decade, and is considered a clinical subtype of MULTIPLE SYSTEM ATROPHY. (From Adams et al., Principles of Neurology, 6th ed, p1085)
] |
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Olmesartan Medoxomil
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D000068557 |
[An ANGIOTENSIN II TYPE 1 RECEPTOR BLOCKER that is used to manage HYPERTENSION.
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Olopatadine Hydrochloride
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D000069605 |
[An antihistamine with mast-cell stabilizing properties used as eye drops in the treatment of ALLERGIC CONJUNCTIVITIS.
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Omalizumab
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D000069444 |
[An anti-IgE, recombinant, humanized monoclonal antibody which specifically binds to the C epsilon3 domain of IMMUNOGLOBULIN E, the site of high-affinity IgE receptor binding. It inhibits the binding of IgE to MAST CELLS and BASOPHILS to reduce the severity of the allergic response and is used in the management of persistent allergic ASTHMA.
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Oman
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D009850 |
[A sultanate on the southeast coast of the Arabian peninsula. Its capital is Masqat. Before the 16th century it was ruled by independent emirs but was captured and controlled by the Portuguese 1508-1648. In 1741 it was recovered by a descendent of Yemen's imam. After its decline in the 19th century, it became virtually a political and economic dependency within the British Government of India, retaining close ties with Great Britain by treaty from 1939 to 1970 when it achieved autonomy. The name was recorded by Pliny in the 1st century A.D. as Omana, said to be derived from the founder of the state, Oman ben Ibrahim al-Khalil. (From Webster's New Geographical Dictionary, 1988, p890; Oman Embassy, Washington; Room, Brewer's Dictionary of Names, 1992, p391)
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Omasum
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D009851 |
[The third stomach of ruminants, situated on the right side of the abdomen at a higher level than the fourth stomach and between this latter and the second stomach, with both of which it communicates. From its inner surface project large numbers of leaves or folia, each of which possesses roughened surfaces. In the center of each folium is a band of muscle fibers which produces a rasping movement of the leaf when it contracts. One leaf rubs against those on either side of it, and large particles of food material are ground down between the rough surfaces, preparatory to further digestion in the succeeding parts of the alimentary canal. (Black's Veterinary Dictionary, 17th ed)
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Omentum
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D009852 |
[A double-layered fold of peritoneum that attaches the STOMACH to other organs in the ABDOMINAL CAVITY.
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Omeprazole
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D009853 |
[A 4-methoxy-3,5-dimethylpyridyl, 5-methoxybenzimidazole derivative of timoprazole that is used in the therapy of STOMACH ULCERS and ZOLLINGER-ELLISON SYNDROME. The drug inhibits an H(+)-K(+)-EXCHANGING ATPASE which is found in GASTRIC PARIETAL CELLS.
] |
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Onagraceae
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D029594 |
[The evening primrose plant family of the order Myrtales, subclass Rosidae, class Magnoliopsida. Flower parts are mostly in fours and the ovary is inferior.
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Onchocerca
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D009854 |
[A genus of parasitic nematodes whose organisms live and breed in skin and subcutaneous tissues. Onchocercal microfilariae may also be found in the urine, blood, or sputum.
] |
