The weak interaction or weak nuclear force is responsible for some nuclear phenomena such as beta decay. Electromagnetism and the weak force are now understood to be two aspects of a unified electroweak interaction â this discovery was the first step toward the unified theory known as the Standard Model. In the theory of the electroweak interaction, the carriers of the weak force are the massive gauge bosons called the W and Z bosons.
Ribonucleotide reductase (RNR), also known as ribonucleoside diphosphate reductase, is an enzyme that catalyzes the formation of deoxyribonucleotides from ribonucleotides.urthermore RNR plays a critical role in regulating the total rate of DNA synthesis so that DNA to cell mass is maintained at a constant ratio during cell division and DNA repair. A somewhat unusual feature of the RNR enzyme is that it catalyzes a reaction that proceeds via a free radical mechanism of action.
Cells in the red nucleus (RN) belong to two distinct neural networks: Small rostral cells (RNp) connect cerebral and cerebellar output to the ipsilateral inferior olive. Discharge of RNp cells is poorly related to movement.Large caudal cells (RNm) and smaller rostral lateral cells (RNpc) connect cerebellar output to motor and premotor structures in the contralateral brain stem and spinal cord. Discharge of cells in RNm and RNpc is well related to movement.hus RNm and RNp do not include the small and medium-size cells that project to the contralateral brain stem and spinal cord. An additional term, parvicellular contralateral red nucleus (RNpc; Figure 6(a)), is introduced to identify this group of cells.