During prophase I, each of the homologous pairs of chromosomes can be seen as bivalent or as a grouping of two chromosomes said to be sister chromatids. The site at which the crossing over occurs on the sister chromatids is known as the chiasma. Prophase I is the longest phase during the meiosis process and takes up to 90 percent of the total time of cell division.
Castor beans are pressed to extract castor oil which is used for medicinal purposes. Ricin (a toxic substance present in the plant) does not partition into the oil because it is water-soluble, therefore, castor oil does not contain ricin, provided that no cross-contamination occurred during its production.icin (a toxic substance present in the plant) does not partition into the oil because it is water-soluble, therefore, castor oil does not contain ricin, provided that no cross-contamination occurred during its production.
Castor oil soap is used to keep the phenol in dettol in solution until it is diluted with water for use. Caramel and water are the other ingredients in dettol. Caramel gives dettol its yellowish brown color and the water acts as a diluent, binding the other ingredients together.ine oil is made from the cone, twigs and needles of the pine tree. When pine oil is diluted in water it emulsifies, or forms a cloudy liquid. This cloudiness also occurs when dettol is diluted. Pine oil is used in a variety of bath oils and bath soaps and as an essential oil in aromatherapy.