Additional pages

polymyxiny

Basic lipopeptide antibiotic group obtained from Bacillus polymyxa. They affect the cell membrane by detergent action and may cause neuromuscular and kidney damage. At least eleven different members of the polymyxin group have been identified, each designated by a letter.
MSH

Price: $1.00

Loading Updating cart…

Polynésie

The collective name for the islands of the central Pacific Ocean, including the Austral Islands, Cook Islands, Easter Island, HAWAII; NEW ZEALAND; Phoenix Islands, PITCAIRN ISLAND; SAMOA; TONGA; Tuamotu Archipelago, Wake Island, and Wallis and Futuna Islands. Polynesians are of the Caucasoid race, but many are of mixed origin. Polynesia is from the Greek poly, many + nesos, island, with reference to the many islands in the group. (From Webster`s New Geographical Dictionary, 1988, p966 & Room, Brewer`s Dictionary of Names, 1992, p426)
MSH

Price: $1.00

Loading Updating cart…

Polyneuritida

clinical syndrome characterized by widespread involvement of peripheral nerves, weakness, sensory loss, and impairment of reflexes.
CSP

Inflammation of several peripheral nerves at the same time.
NCI

Inflammation of multiple nerves.
MSH

Price: $1.00

Loading Updating cart…

polynukleotid-5`-hydroxylkinasa

An enzyme that catalyzes the transfer of a phosphate group to the 5`-terminal hydroxyl groups of DNA and RNA. EC 2.7.1.78.
MSH

Price: $1.00

Loading Updating cart…

polyribonukleotidnukleotidyltransferasa

An enzyme of the transferase class that catalyzes the reaction RNA(n+1) and orthophosphate to yield RNA(n) and a nucleoside diphosphate, or the reverse reaction. ADP, IDP, GDP, UDP, and CDP can act as donors in the latter case. (From Dorland, 27th ed) EC 2.7.7.8.
MSH

Price: $1.00

Loading Updating cart…

polynukleotidligasy

Catalyze the joining of preformed ribonucleotides or deoxyribonucleotides in phosphodiester linkage during genetic processes. EC 6.5.1.
MSH

Price: $1.00

Loading Updating cart…

polynukleotidy

chain structure containing numerous nucleotides linked together by phosphodiester bonds (5`-3`); the nucleotide units consist of a purine or pyrimidine base, a pentose sugar, and a phosphate group.
CSP

Price: $1.00

Loading Updating cart…

Polyomavirus

normally present in hosts as latent infections, potentially oncogenic; host DNA may become enclosed in virus capsids creating a `pseudovirus`; isolated from man, mouse, rabbit, hamster and several species of monkey.
CSP

A genus of potentially oncogenic viruses of the family POLYOMAVIRIDAE. These viruses are normally present in their natural hosts as latent infections. The virus is oncogenic in hosts different from the species of origin.
MSH

A genus of double-stranded DNA viruses. The viral particles are not enveloped and are icosahedral in structure.
NCI

Price: $1.00

Loading Updating cart…

polyfloretinfosfát

A polymeric mixture of polyesters of phosphoric acid and phloretin. It blocks some cellular responses to prostaglandins.
MSH

Price: $1.00

Loading Updating cart…

polyfosfáty

Linear polymers in which orthophosphate residues are linked with energy-rich phosphoanhydride bonds. They are found in plants, animals, and microorganisms.
MSH

Price: $1.00

Loading Updating cart…

polyploidie

The chromosomal constitution of a cell containing multiples of the normal number of CHROMOSOMES; includes triploidy (symbol: 3N), tetraploidy (symbol: 4N), etc.
MSH

having more than two full sets of homologous chromosomes.
CSP

Price: $1.00

Loading Updating cart…

Polyporaceae

A family of bracket fungi, order POLYPORALES, living in decaying plant matter and timber.
MSH

Price: $1.00

Loading Updating cart…

syndrom familiární polypózy

A polyposis syndrome due to an autosomal dominant mutation of the APC genes (GENES, APC) on CHROMOSOME 5. The syndrome is characterized by the development of hundreds of ADENOMATOUS POLYPS in the COLON and RECTUM of affected individuals by early adulthood. The lifetime risk of colorectal cancer in these patients reaches 100 percent by age 60.
MSH

An inherited condition in which numerous polyps (growths that protrude from mucous membranes) form on the inside walls of the colon and rectum. It increases the risk for colon cancer.
NCI

An autosomal dominant disorder, characterized by the presence of multiple adenomas in the colon and rectum. It is caused by a germline mutation in the adenomatous polyposis coli (APC) gene which is located on the long arm of chromosome 5. The adenomas are most often tubular, and they have the tendency to progress to adenocarcinoma. They can occur throughout the colon, but they tend to concentrate in the rectum and sigmoid colon. The colorectal adenomas are detected during endoscopic examination between the age of 10 and 20 years. The adenomas increase in size and numbers with age, and there is usually progression of one or more adenomas to adenocarcinoma. The mean age of development of adenocarcinoma is about 40 years. Signs include rectal bleeding and mucousy diarrhea.
NCI

Price: $1.00

Loading Updating cart…

polypropyleny

Propylene or propene polymers. Thermoplastics that can be extruded into fibers, films or solid forms. They are used as a copolymer in plastics, especially polyethylene. The fibers are used for fabrics, filters and surgical sutures.
MSH

propylene or propene polymers: thermoplastics that can be extruded into fibers, films or solid forms, used as a copolymer in plastics, especially polyethylene; the fibers are used for fabrics, filters and surgical sutures.
CSP

Price: $1.00

Loading Updating cart…

polyproteiny

Proteins which are synthesized as a single polymer and then cleaved into several distinct proteins.
MSH

Price: $1.00

Loading Updating cart…

polypy

Discrete abnormal tissue masses that protrude into the lumen of the DIGESTIVE TRACT or the RESPIRATORY TRACT. Polyps can be spheroidal, hemispheroidal, or irregular mound-shaped structures attached to the MUCOUS MEMBRANE of the lumen wall either by a stalk, pedunculus, or by a broad base.
MSH

A growth that protrudes from a mucous membrane.
NCI

A usually exophytic mass attached to the underlying tissue by a broad base or a thin stalk. Polyps can be neoplastic or non-neoplastic. Neoplastic polyps usually represent proliferations of the epithelium, and are commonly seen in the gastrointestinal tract. Polyps of the gastrointestinal tract are often called adenomas, are associated with dysplasia, and may eventually transform into carcinomas. Non-neoplastic polyps may be inflammatory, degenerative, or the result of malformations.
NCI

Price: $1.00

Loading Updating cart…

polyradikulopatie

Disease or injury involving multiple SPINAL NERVE ROOTS. Polyradiculitis refers to inflammation of multiple spinal nerve roots.
MSH

Price: $1.00

Loading Updating cart…

polyradikuloneuropatie

Diseases characterized by injury or dysfunction involving multiple peripheral nerves and nerve roots. The process may primarily affect myelin or nerve axons. Two of the more common demyelinating forms are acute inflammatory polyradiculopathy (GUILLAIN-BARRE SYNDROME) and POLYRADICULONEUROPATHY, CHRONIC INFLAMMATORY DEMYELINATING. Polyradiculoneuritis refers to inflammation of multiple peripheral nerves and spinal nerve roots.
MSH

Price: $1.00

Loading Updating cart…

RNA-ligasa (ATP)

An enzyme that catalyzes the conversion of linear RNA to a circular form by the transfer of the 5`-phosphate to the 3`-hydroxyl terminus. It also catalyzes the covalent joining of two polyribonucleotides in phosphodiester linkage. EC 6.5.1.3.
MSH

Price: $1.00

Loading Updating cart…

polyribonukleotidy

A group of 13 or more ribonucleotides in which the phosphate residues of each ribonucleotide act as bridges in forming diester linkages between the ribose moieties.
MSH

Price: $1.00

Loading Updating cart…

polyribozómy

A multiribosomal structure representing a linear array of RIBOSOMES held together by messenger RNA; (RNA, MESSENGER); They represent the active complexes in cellular protein synthesis and are able to incorporate amino acids into polypeptides both in vivo and in vitro. (From Rieger et al., Glossary of Genetics: Classical and Molecular, 5th ed)
MSH

complex made up of ribosomal subunits assembled among themselves by the filaments of messenger RNA containing the genetic information; they are involved in the synthesis of peptides.
CSP

Several ribosomes bound to one mRNA. [ISBN:0198506732 “Oxford Dictionary of Biochemistry and Molecular Biology”]
GO

Price: $1.00

Loading Updating cart…

polysacharid-lyasy

A group of carbon-oxygen lyases. These enzymes catalyze the breakage of a carbon-oxygen bond in polysaccharides leading to an unsaturated product and the elimination of an alcohol. EC 4.2.2.
MSH

Price: $1.00

Loading Updating cart…

polysacharidy

linear or branched chain structure containing many sugar molecules linked by glycosidic bonds.
CSP

A large carbohydrate molecule. It contains many small sugar molecules that are joined chemically.
NCI

Price: $1.00

Loading Updating cart…

polysacharidy bakteriální

Polysaccharides found in bacteria and especially bacterial capsules. (Dorland, 28th ed)
MSH

polysaccharides found in bacteria and especially bacterial capsules.
CSP

Price: $1.00

Loading Updating cart…

polysorbáty

Sorbitan mono-9-octadecanoate poly(oxy-1,2-ethanediyl) derivatives; complex mixtures of polyoxyethylene ethers used as emulsifiers or dispersing agents in pharmaceuticals.
MSH

Price: $1.00

Loading Updating cart…

polystyreny

Polymerized forms of styrene used as a biocompatible material, especially in dentistry. They are thermoplastic and are used as insulators, for injection molding and casting, as sheets, plates, rods, rigid forms and beads.
MSH

polymerized forms of styrene used as a biocompatible material, especially in dentistry; they are thermoplastic and are used as insulators, for injection molding and casting, as sheets, plates, rods, rigid forms and beads.
CSP

Price: $1.00

Loading Updating cart…

polytetrafluoroethylen

Homopolymer of tetrafluoroethylene. Nonflammable, tough, inert plastic tubing or sheeting; used to line vessels, insulate, protect or lubricate apparatus; also as filter, coating for surgical implants or as prosthetic material. Synonyms: Fluoroflex; Fluoroplast; Ftoroplast; Halon; Polyfene; PTFE; Tetron.
MSH

Price: $1.00

Loading Updating cart…

polythiazid

A thiazide diuretic with actions and uses similar to those of HYDROCHLOROTHIAZIDE. (From Martindale, The Extra Pharmacopoeia, 30th ed, p826)
MSH

A sulfonamide derivative and a synthetic thiazide with diuretic, antihypertensive and anti-urolithic properties. By blocking the Na/Cl transporter, polythiazide inhibits reabsorption of sodium and chloride in the proximal and distal convoluted tubule of the kidney, resulting in increased excretion of water and electrolytes (sodium, potassium, chloride, magnesium, and bicarbonate) and subsequent reversal of hypertension. In addition, this agent exerts its anti-urolithic effect by decreasing calcium and uric acid excretion.
NCI

Price: $1.00

Loading Updating cart…

vícenenasycené mastné kyseliny

fatty acid containing more than one double bond (C=C). The essential fatty acids omega-3 and omega-6 are polyunsaturated fatty acids (PUFAs) that contain 2 or more cis double bonds. Dietary intake of some PUFAs may have beneficial effects on blood pressure, serum lipds, and inflammation. Some PUFAs, such as omega-3 PUFAs, may have antineoplastic or chemopreventive activities.
NCI

A class of dietary fatty acids containing two or more double bonds.
NCI

Price: $1.00

Loading Updating cart…

polyurethany

A group of thermoplastic or thermosetting polymers containing polyisocyanate. They are used as ELASTOMERS, as coatings, as fibers and as foams.
MSH

group of thermoplastic or thermosetting polymers containing polyisocyanate; used as elastomers, as coatings, as fibers and as foams.
CSP

Price: $1.00

Loading Updating cart…