Nodes

Large aggregates of CELESTIAL STARS; COSMIC DUST; and gas. (From McGraw Hill Dictionary of Scientific and Technical Terms, 6th ed)

A process whereby bile is delivered from the gallbladder into the duodenum. The emptying is caused by both contraction of the gallbladder and relaxat…

A change in electrical resistance of the skin, occurring in emotion and in certain other conditions.

The process of germ cell development from the primordial GERM CELLS to the mature haploid GAMETES: ova in the female (OOGENESIS) or sperm in the male…

The process of germ cell development in plants, from the primordial PLANT GERM CELLS to the mature haploid PLANT GAMETES.

Penetrating, high-energy electromagnetic radiation emitted from atomic nuclei during NUCLEAR DECAY. The range of wavelengths of emitted radiation is …

Brain waves characterized by a relatively high voltage or amplitude and a frequency of approximately 30-100 Hz. They are primarily observed during ne…

Uptake of substances via the stomach.

The evacuation of food from the stomach into the duodenum.

Uptake of substances via the GASTROINTESTINAL TRACT.

All of the microbial organisms that naturally exist within the GASTROINTESTINAL TRACT.

The motor activity of the GASTROINTESTINAL TRACT.

Passage of food (sometimes in the form of a test meal) through the gastrointestinal tract as measured in minutes or hours. The rate of passage throug…

A process of complicated morphogenetic cell movements that reorganizes a bilayer embryo into one with three GERM LAYERS and specific orientation (dor…

A nucleic acid sequence that contains an above average number of GUANINE and CYTOSINE bases.

A selective increase in the number of copies of a gene coding for a specific protein without a proportional increase in other genes. It occurs natura…

The parts of the gene sequence that carry out the different functions of the GENES.

The asymmetrical segregation of genes during replication which leads to the production of non-reciprocal recombinant strands and the apparent convers…

A genetic rearrangement through loss of segments of DNA or RNA, bringing sequences which are normally separated into close proximity. This deletion m…

The number of copies of a given gene present in the cell of an organism. An increase in gene dosage (by GENE DUPLICATION for example) can result in h…

Processes occurring in various organisms by which new genes are copied. Gene duplication may result in a MULTIGENE FAMILY; supergenes or PSEUDOGENES.

The phenotypic manifestation of a gene or genes by the processes of GENETIC TRANSCRIPTION and GENETIC TRANSLATION.

Any of the processes by which nuclear, cytoplasmic, or intercellular factors influence the differential control (induction or repression) of gene act…

Any of the processes by which cytoplasmic or intercellular factors influence the differential control of gene action in archaea.

Any of the processes by which cytoplasmic or intercellular factors influence the differential control of gene action in bacteria.

Any of the processes by which nuclear, cytoplasmic, or intercellular factors influence the differential control of gene action during the development…

Any of the processes by which nuclear, cytoplasmic, or intercellular factors influence the differential control of gene action in enzyme synthesis.

Any of the processes by which nuclear, cytoplasmic, or intercellular factors influence the differential control of gene action in fungi.

Any of the processes by which nuclear, cytoplasmic, or intercellular factors influence the differential control of gene action in leukemia.

Any of the processes by which nuclear, cytoplasmic, or intercellular factors influence the differential control of gene action in neoplastic tissue.