|
Porphyrinogens
|
D011165 |
[Colorless reduced precursors of porphyrins in which the pyrrole rings are linked by methylene (-CH2-) bridges.
] |
|
Porphyrins
|
D011166 |
[A group of compounds containing the porphin structure, four pyrrole rings connected by methine bridges in a cyclic configuration to which a variety of side chains are attached. The nature of the side chain is indicated by a prefix, as uroporphyrin, hematoporphyrin, etc. The porphyrins, in combination with iron, form the heme component in biologically significant compounds such as hemoglobin and myoglobin.
] |
|
Porphyromonas
|
D017861 |
[A genus of gram-negative, anaerobic, nonsporeforming, nonmotile rods or coccobacilli. Organisms in this genus had originally been classified as members of the BACTEROIDES genus but overwhelming biochemical and chemical findings indicated the need to separate them from other Bacteroides species, and hence, this new genus was created.
] |
|
Porphyromonas endodontalis
|
D045202 |
[A species of gram-negative bacteria in the genus PORPHYROMONAS, family Porphyromonadaceae. It is a key pathogen in endodontic infections.
] |
|
Porphyromonas gingivalis
|
D016966 |
[A species of gram-negative, anaerobic, rod-shaped bacteria originally classified within the BACTEROIDES genus. This bacterium produces a cell-bound, oxygen-sensitive collagenase and is isolated from the human mouth.
] |
|
Porpoises
|
D019576 |
[Mammals of the family Phocoenidae comprising four genera found in the North Pacific Ocean and both sides of the North Atlantic Ocean and in various other seas. They differ from DOLPHINS in that porpoises have a blunt snout and a rather stocky body while dolphins have a beak-like snout and a slender, streamlined body. They usually travel in small groups. (From Walker's Mammals of the World, 5th ed, pp1003-4)
] |
|
Port-Wine Stain
|
D019339 |
[A vascular malformation of developmental origin characterized pathologically by ectasia of superficial dermal capillaries, and clinically by persistent macular erythema. In the past, port wine stains have frequently been termed capillary hemangiomas, which they are not; unfortunately this confusing practice persists: HEMANGIOMA, CAPILLARY is neoplastic, a port-wine stain is non-neoplastic. Port-wine stains vary in color from fairly pale pink to deep red or purple and in size from a few millimeters to many centimeters in diameter. The face is the most frequently affected site and they are most often unilateral. (From Rook et al., Textbook of Dermatology, 5th ed, p483)
] |
|
Portacaval Shunt, Surgical
|
D011167 |
[Surgical portasystemic shunt between the portal vein and inferior vena cava.
] |
|
Portal Pressure
|
D017082 |
[The venous pressure measured in the PORTAL VEIN.
] |
|
Portal System
|
D011168 |
[A system of vessels in which blood, after passing through one CAPILLARY BED, is conveyed through a second set of capillaries before it returns to the systemic circulation. It pertains especially to the hepatic portal system.
] |
|
Portal Vein
|
D011169 |
[A short thick vein formed by union of the superior mesenteric vein and the splenic vein.
] |
|
Portasystemic Shunt, Surgical
|
D011170 |
[Surgical venous shunt between the portal and systemic circulation to effect decompression of the portal circulation. It is performed primarily in the treatment of bleeding esophageal varices resulting from portal hypertension. Types of shunt include portacaval, splenorenal, mesocaval, splenocaval, left gastric-caval (coronary-caval), portarenal, umbilicorenal, and umbilicocaval.
] |
|
Portasystemic Shunt, Transjugular Intrahepatic
|
D019168 |
[A type of surgical portasystemic shunt to reduce portal hypertension with associated complications of esophageal varices and ascites. It is performed percutaneously through the jugular vein and involves the creation of an intrahepatic shunt between the hepatic vein and portal vein. The channel is maintained by a metallic stent. The procedure can be performed in patients who have failed sclerotherapy and is an additional option to the surgical techniques of portocaval, mesocaval, and splenorenal shunts. It takes one to three hours to perform. (JAMA 1995;273(23):1824-30)
] |
|
Portion Size
|
D064787 |
[The amount of a particular food one chooses to eat at a single meal. It is different from SERVING SIZE, which is a reference amount of food as defined by an authoritative source, such as the Food Guide Pyramid devised by the UNITED STATES DEPARTMENT OF AGRICULTURE.
] |
|
Portoenterostomy, Hepatic
|
D011171 |
[Operation for BILIARY ATRESIA by anastomosis of the BILE DUCTS into the JEJUNUM or DUODENUM.
] |
|
Portography
|
D011172 |
[Examination of the portal circulation by the use of X-ray films after injection of radiopaque material.
] |
|
Portrait
|
D019477 |
[Work consisting of graphic representations, especially of the face, of real persons, usually posed, living or dead. They are pictures whose purpose is the portrayal of an individual or group of individuals, not pictures which merely include people as part of an event or scene. (From Thesaurus for Graphic Materials II, p540, 1995)
] |
|
Portraits as Topic
|
D011173 |
[Works about graphic representations, especially of the face, of real persons, usually posed, living or dead. (From Thesaurus for Graphic Materials II, p540, 1995)
] |
|
Portugal
|
D011174 |
[A country in southwestern Europe, bordering the North Atlantic Ocean, west of Spain. The capital is Lisbon.
] |
|
Portulaca
|
D031822 |
[A plant genus of the family PORTULACACEAE.
] |
