Category: H

  • Host range

    The scope of flora species acknowledged for serving as hosts to a particular parasite, as well as the extent of activity exhibited by a phage concerning the species, variations, and other similar classifications of bacteria in which it is capable of thriving.  

  • Homologous titre

    The dilution endpoint refers to the maximum degree of dilution that can be achieved for an antiserum without compromising its ability to bind to the corresponding antigen that was utilized in its creation. This critical point is typically determined by performing an antigen-antibody assay, in which the antiserum is tested against the same antigen that…

  • Heterologous titre

    The point at which the dilution of an antiserum is no longer effective when tested against an antigen that differs from the one utilized during its development.  

  • Heteroecious

    The process of completing the life cycle on two dissimilar hosts, a prime example being the existence of a rust fungus named Puccinia graminis on both wheat and barberry, and another case being an aphid called Phorodon humuli that thrives on both damson and hop, is a fascinating phenomenon in the natural world.  

  • Heteroauxin

    The term “synonymous” was formerly associated with auxin, specifically referring to indole-3-acetic acid (IAA), which is no longer utilized. The initial assertions of naturally occurring auxins, designated as a and b, were believed to be cyclopentene acids and contributed to the recognition of IAA as the “distinct” auxin. However, to date, these purported cyclopentene acids…

  • Hadromycosis

    G. H. Pethybridge, in the publication of the Scientific Proceedings of the Royal Dublin Society in 1916, established a terminology for a type of fungal disease which primarily affects the xylem. Such illnesses are commonly known as vascular wilt diseases, which is the preferred term for describing this type of disease.  

  • Healthcare team

    A set of individuals with special expertise who provide healthcare services or assistance to clients. They may include nurses, physicians, psychologists, social workers, nutritionists/dieticians, and various therapists. Healthcare providers also may include service organizations and vendors. A team is comprised of a number of persons associated together in work or activity.  

  • Hypertropy

    The enlargement or overgrowth of an organ or part due to an increase in the size of its constituent cells; as in benign prostatic hypertropy.  

  • Helper T-cells

    White blood cells that help in immune system response. A particular kind of white blood cell, commonly referred to as a helper T-lymphocyte, plays a crucial role in the immune system. These helper T-cells are instrumental in eliminating abnormal cells like cancer cells from the body. They achieve this by identifying foreign antigens present on…

  • Hypometabolic state

    A state characterized by reduced oxygen consumption due to low bodily metabolism rates.