|
Native Polyacrylamide Gel Electrophoresis
|
D063347 |
[Polyacrylamide gel electrophoresis under conditions in which the components, such as PROTEINS, being separated can remain in their naturally folded state.
] |
|
Natriuresis
|
D009318 |
[Sodium excretion by URINATION.
] |
|
Natriuretic Agents
|
D045283 |
[Endogenous or exogenous chemicals that regulate the WATER-ELECTROLYTE BALANCE in the body. They consist of peptides and non-peptide compounds.
, Endogenous chemicals that regulate the WATER-ELECTROLYTE BALANCE in the body, such as the NATRIURETIC PEPTIDES.
] |
|
Natriuretic Peptide, Brain
|
D020097 |
[A PEPTIDE that is secreted by the BRAIN and the HEART ATRIA, stored mainly in cardiac ventricular MYOCARDIUM. It can cause NATRIURESIS; DIURESIS; VASODILATION; and inhibits secretion of RENIN and ALDOSTERONE. It improves heart function. It contains 32 AMINO ACIDS.
] |
|
Natriuretic Peptide, C-Type
|
D020098 |
[A PEPTIDE of 22 amino acids, derived mainly from cells of VASCULAR ENDOTHELIUM. It is also found in the BRAIN, major endocrine glands, and other tissues. It shares structural homology with ATRIAL NATRIURETIC FACTOR. It has vasorelaxant activity thus is important in the regulation of vascular tone and blood flow. Several high molecular weight forms containing the 22 amino acids have been identified.
] |
|
Natriuretic Peptides
|
D045265 |
[Peptides that regulate the WATER-ELECTROLYTE BALANCE in the body, also known as natriuretic peptide hormones. Several have been sequenced (ATRIAL NATRIURETIC FACTOR; BRAIN NATRIURETIC PEPTIDE; C-TYPE NATRIURETIC PEPTIDE).
] |
|
Natronobacterium
|
D019633 |
[A genus of rod-shaped, extremely halophilic HALOBACTERIACEAE which grows in alkaline conditions. They are strictly aerobic and some strains are motile. Natronobacterium is found in soda lakes, alkaline salterns, and soda soils.
] |
|
Natronococcus
|
D019634 |
[A genus of coccoid, extremely halophilic HALOBACTERIACEAE which grows in alkaline conditions. They are nonmotile and strictly aerobic and are found in soda lakes, alkaline salterns, and soda soils.
] |
|
Natural Childbirth
|
D009321 |
[Labor and delivery without medical intervention, usually involving RELAXATION THERAPY.
] |
|
Natural Cytotoxicity Triggering Receptor 1
|
D055627 |
[A 46-kD stimulatory receptor found on resting and activated NATURAL KILLER CELLS. It has specificity for VIRAL HEMAGGLUTININS that are expressed on infected cells.
] |
|
Natural Cytotoxicity Triggering Receptor 2
|
D055629 |
[A 44-kD stimulatory receptor found on activated NATURAL KILLER CELLS. It has specificity for VIRAL HEMAGGLUTININS that are expressed on infected cells.
] |
|
Natural Cytotoxicity Triggering Receptor 3
|
D055628 |
[A 30 kDa stimulatory receptor found on resting and activated NATURAL KILLER CELLS.
] |
|
Natural Disasters
|
D000077587 |
[Disasters linked to natural hazards including widespread fires, floods, storms, earthquakes and drought.These events may result in significant damage and loss of lives.
] |
|
Natural Family Planning Methods
|
D012252 |
[A class of natural contraceptive methods in which SEXUAL ABSTINENCE is practiced a few days before and after the estimated day of ovulation, during the fertile phase. Methods for determining the fertile period or OVULATION DETECTION are based on various physiological indicators, such as circulating hormones, changes in cervical mucus (CERVIX MUCUS), and the basal body temperature.
] |
|
Natural Gas
|
D059206 |
[A combustible, gaseous mixture of low-molecular weight PARAFFIN hydrocarbons, generated below the surface of the earth. It contains mostly METHANE and ETHANE with small amounts of PROPANE; BUTANES; and higher hydrocarbons, and sometimes NITROGEN; CARBON DIOXIDE; HYDROGEN SULFIDE; and HELIUM. (from McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)
] |
|
Natural History
|
D019021 |
[A former branch of knowledge embracing the study, description, and classification of natural objects (as animals, plants, and minerals) and thus including the modern sciences of zoology, botany, and mineralogy insofar as they existed at that time. In the 17th, 18th, and 19th centuries it was much used for the generalized pursuit of certain areas of science. (Webster, 3d ed; from Dr. James H. Cassedy, NLM History of Medicine Division)
] |
|
Natural Killer T-Cells
|
D055611 |
[A specific natural killer T-cell subtype that expresses an invariant T-cell receptor alpha-chain.
, A specialized subset of T-LYMPHOCYTES that exhibit features of INNATE IMMUNITY similar to that of NATURAL KILLER CELLS. They are reactive to glycolipids presented in the context of the major histocompatibility complex (MHC) class I-like molecule, CD1D ANTIGEN.
] |
|
Natural Language Processing
|
D009323 |
[Computer processing of a language with rules that reflect and describe current usage rather than prescribed usage.
] |
|
Natural Orifice Endoscopic Surgery
|
D057605 |
[Procedures performed with an ENDOSCOPE passing through a natural opening in the body such as the mouth, nose, urethra, or anus and along their natural body pathways; and then through an internal incision in the wall of the tubular structure or organ such as the stomach, bladder, or intestines, thus avoiding any external incisions through the skin.
, Surgical procedures performed through a natural opening in the body such as the mouth, nose, urethra, or anus, and along the natural body cavities with which they are continuous.
] |
|
Natural Resources
|
D000067936 |
[Materials or substances such as land, timber, fresh water, fossil fuels, or mineral deposits that occur in a natural state and have economic value or usefulness to humans.
, The amount of land available for use or development.
] |
