ribosomal assembly is the cell process that is controlled by the nucleus.
ribosomal assembly is the cell process that is controlled by the nucleus.
what cell process in controlled by the nucleus?
ribosomal assembly
the cell nucleus contains all of the cell's genome, except for a small fraction of mitochondrial dna, organized as multiple long linear dna molecules in a complex with a large variety of proteins, such as histones, to form chromosomes. the genes within these chromosomes are structured in such a way to promote cell function. the nucleus maintains the integrity of genes and controls the activities of the cell by regulating gene expression—the nucleus is, therefore, the control center of the cell. the main structures making up the nucleus are the nuclear envelope, a double membrane that encloses the entire organelle and isolates its contents from the cellular cytoplasm, and the nuclear matrix (which includes the nuclear lamina), a network within the nucleus that adds mechanical support, much like the cytoskeleton, which supports the cell as a whole.
cell nucleus
in the full-cell process, the intent is to keep as much of the liquid absorbed into the wood during the pressure period as possible, thus leaving the maximum concentration of preservatives in the treated area. usually, water solutions of preservative salts are employed with this process, but it is also possible to impregnate wood with oil. the desired retention is achieved by changing the strength of the solution. william burnett patented this development in 1838 of full-cell impregnation with water solutions. the patent covered the use of zinc chloride on water basis, also known as "burnettizing". a full-cell process with oil was patented in 1838 by john bethell. his patent described the injection of tar and oils into wood by applying pressure in closed cylinders. this process is still used today with some improvements.
wood preservation