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Grecian Formula is a men's hair coloring product from Combe Incorporated. Until 2018 (see below) the formulation used in the United States contained lead(II) acetate . [ 1 ] Because lead acetate was banned in cosmetics in Canada and the European Union, the formulations sold there did not contain it.
Abscisic acid (ABA or abscisin II [5]) is a plant hormone.ABA functions in many plant developmental processes, including seed and bud dormancy, the control of organ size and stomatal closure.
Combe owns the brands Just for Men, Sea-Bond, Vagisil, and Grecian Formula. [1] Combe was the originator of the Clearasil brand in 1950, but sold the rights to it in 1961 to Richardson-Merrell. [2] In October 2002, Combe acquired J.B. Williams, thereby adding such longtime names as Brylcreem, Aqua Velva and Cepacol to its brand stable. [3]
Plant nutrition is the study of the chemical elements and compounds necessary for plant growth and reproduction, plant metabolism and their external supply. In its absence the plant is unable to complete a normal life cycle, or that the element is part of some essential plant constituent or metabolite .
Phytochemistry is the study of phytochemicals, which are chemicals derived from plants.Phytochemists strive to describe the structures of the large number of secondary metabolites found in plants, the functions of these compounds in human and plant biology, and the biosynthesis of these compounds.
This is the only type of xylem found in the earliest vascular plants, and this type of cell continues to be found in the protoxylem (first-formed xylem) of all living groups of vascular plants. Several groups of plants later developed pitted tracheid cells independently through convergent evolution.
Heliotropism, a form of tropism, is the diurnal or seasonal motion of plant parts (flowers or leaves) in response to the direction of the Sun. The habit of some plants to move in the direction of the Sun, a form of tropism, was already known by the Ancient Greeks. They named one of those plants after that property Heliotropium, meaning "sun turn".
It has been argued that for plants that display foliar nyctinasty, it is a crucial mechanism for survival; however, most plants do not exhibit any nyctinastic movements. [1] Nyctinasty is found in a range of plant species and across xeric , mesic , and aquatic environments, suggesting that this singular behavior may serve a variety of ...