heifers

Bovine females that have not given birth to calves

herbicide safeners

Chemicals that selectively protect crops against herbicide injury

heterosis

The adaptive superiority of the heterozygous genotype with respect to one or more characters in comparison with the corresponding homozygote.

home range

The geographic area within which an animal lives and moves and to which it confines its usual activities.

hydrophobins

Hydrophobins are small, cysteine rich proteins secreted by filamentous fungi

hydroponics

The growing of plants in a soilless environment where nutrients are provided by the application of nutrient solutions

hypoxia

Relatively complete absence of oxygen in one or more tissues.

hysteroscopy

Endoscopic examination, therapy or surgery of the interior of the uterus.

hypertrophy

General increase in bulk of a part or organ, due to cell enlargement and accumulation of fluids and secretions, not due to tumor formation, nor to an increase in the number of cells (hyperplasia).

hyperlipidemia

Conditions with excess lipids in the blood.

imino sugars

Sugars in which the oxygen is replaced by a nitrogen atom. This substitution prevents normal metabolism resulting in inhibition of glycosidases and glycosyltransferases.

imitation foods

Products consisting of regular foods and/or chemical formulations that may be used in place of the foods they imitate. Often imitation foods are used by consumers for health or economic reasons.

immunization

Deliberate stimulation of the host's immune response. Active immunization involves administration of antigens or immunologic adjuvants.

in situ conservation

Maintenance or conservation of an organism or gene resource within its native environment.

in situ hybridization

A technique that localizes specific nucleic acid sequences within intact chromosomes, eukaryotic cells, or bacterial cells through the use of specific nucleic acid-labeled probes.

in vitro culture

Culturing of cells, tissues etc. outside the living organisms or in an artificial environment.

inoculum

Collective term for microorganisms or their parts (spores, mycelial fragments, etc.) which are capable of infection or symbiosis when transferred to a host

insect outbreaks

A marked increase in the population of an insect pest.

insecticide resistance

The development or selection of heritable traits (genes) in an insect population that allow individuals expressing the trait to survive in the presence of levels of an insecticide (biological or chemical control agent) that would otherwise debilitate or kill this species of insect. The presence of such resistant insects makes the insecticide less useful for managing pest populations

insecticides

Pesticides that kill insects.