The central nervous system produces growth factors that stimulate proliferation of ameboid microglia during embryogenesis and after traumatic injury. Two microglial mitogens (MMs) are recovered from the brain of newborn rat. MM1 has an approximate molecular mass of 50 kD and a pI of approximately 6.8; MM2 has a molecular mass of 22 kD and a pI of approximately 5.2. These trypsin-sensitive prote...

MM creatine kinase purified from tissue exists as a single form but upon release into the plasma exhibits three forms which, based on increasing anodal migration on polyacrylamide gel electrophoresis, are referred to as MM1, MM2, and MM3. The three forms were isolated in pure form from plasma in sufficient quantities for biochemical and physiological studies. Chromatofocusing results show that ...

wetlands in the lower reaches of songhua river (lrsr), northeast china, are rich in biodiversityand natural resources, which provide crucial staging and wintering habitats for various endangered species.however, in the past five decades, the size of this wetland area has decreased, and its quality has deteriorated because of increased natural and human activities. wetland restoration is critica...

In this paper we analyze a cellular communication environment which offers specific users priority access to network resources. We foresee a finite number of widespread disparate mobiles moving in a geographical region covered by a finite set of cells. Each user belongs to a class characterized by a specific service, load and mobility profile. In this paper we will consider two classes, namely ...

The temperate phage MM1 forms stable lysogens in Streptococcus pneumoniae. We report here the first characterization of the lysogenic control region in Pneumococcus which contains two functional divergent promoters (P(R) and P(L)). MM1 encodes a 14-kDa cI protein (CI) that appears to be responsible for maintaining the lysogenic state in Pneumococcus since it prevents elongation of the transcrip...

Assured Service has been proposed within the Differentiated Services (DiffServ) model to provide relative service differentiation by attempting to allocate bandwidth to different users in a controlled way during periods of network congestion. In this paper, we analyze the Assured Service scheme by means of a priority queueing system with statedependent service scheduling based on thresholds. We...

This p p e r considers a nunpreemptive priority queue with two classes of customers. Customers in each priority class arrive to the system according to a Markovian arrival process (MAP). Since the MAP is weakly dense in the class of stationary point processes, it is a fairly general arrival process. The service times of custcomers in ea,ch priority class are independent and identically distribu...