![]() ![]() ![]() AESO was cured with a cumyl hydroperoxide initiator with various amounts of accelerator, but was not cured by Methyl Ethyl Ketone (MEK) peroxides. The results are shown in Table 12.1 for AESO and Table 12.2 for SOPERMA. ![]() For room temperature (RT) curing, the concentration of the initiators and an accelerator for the resins was varied to check the curability in 24 h. The free-radical, chain growth copolymerization reactions (or curing) in soybean oil-based resin can be carried out either by thermal decomposition of the free-radical initiators at elevated temperatures, or by redox decomposition of the free-radical initiators using a metal promoter (accelerator) at low temperatures. The objective of this experiment was to investigate the effects of chemical initiators and cure temperature on the properties of soybean oil-based KF composites. Self-assembling peptide amphi-philes have also shown their ability to mineralize under physiological conditions and have demonstrated some promise in dental and other hard tissue engineering applications ( Firth et al., 2006, Kirkham et al., 2007). material thins into a low viscosity gel under a shear stress), are promising candidates for injectable tissue applications ( Haines-Butterick et al., 2007). Recent research showed that self-assembling peptide hydrogel that undergo shear thinning (i.e. This material is widely used as an adhesive sealant to achieve hemostasis during surgical procedures ( Kretlow et al., 2009). Thrombin cleaves soluble fibrinogen into insoluble fibrin that then self assembles into fibrils resulting in formation of a fibrin gel. It uses a dual injection of fibrinogen and thrombin to form a fibrin clot or scaffold. Tisseel® (Baxter Biosciences, USA) is one of the earliest developed and clinically most successful phase separation systems. Nguyen, in Injectable Biomaterials, 2011 Self-polymerizationĬertain materials form gels in situ without the aid of chemical initiators or any external factors by self-polymerization. This complex can dissociate to give free radicals ( Bhattacharya and Misra, 2004). The proposed mechanism involves the formation of a complex between the O H groups present in the backbone of the biopolymer and the metal ion ( Fig. 6.2). Grafting reaction with CAN must be carried out at low temperature due to its instability at high values of temperature. Grafting is commonly carried out using the inorganic salts of ceric ammonium nitrate (CAN) or ceric ammonium sulfate. Usually, metals with low values of oxidation potential improve grafting effectiveness. Active sites are created on the polymer by its direct oxidation with certain transition metal ions such as Cerium (Ce) ( Li et al., 2012), Cobalt (Co) ( Baranov et al., 2012), or Vanadium ( v) ( Pandey et al., 2006). Free radicals are created from the chemical initiators and transferred to the polymeric matrix, which reacts with the monomeric molecules to give the grafted material ( Bhattacharya and Misra, 2004). Special iSCSI name formats to identify initiators and targets include the iSCSI qualified name (IQN), extended unique identifier (EUI), and T11 network address authority (NASA).In this type of grafting, the chemical initiator plays a very important role because it regulates the pathway of the grafting process. A hardware iSCSI initiator may still be useful for data protection, when booting a server from a local disk, or for security, if the card has built-in encryption capabilities. The need for a NIC-based TCP/IP offload engine (TOE) has declined as servers have gained more powerful processing cores. A software iSCSI initiator is typically part of the server operating system and uses host CPU resources to map the Small Computer System Interface ( SCSI) I/O command set to TCP/IP for use by the iSCSI storage system.Ī hardware iSCSI initiator is a dedicated, host-based network interface card ( NIC) with built-in resources to handle the iSCSI and TCP/IP processing functions. Software-based iSCSI initiators are far more common than hardware-based iSCSI initiators. The iSCSI initiator originates the input/output ( I/O) command sequence to facilitate data transmission to the storage device, which is also known as an iSCSI target. An Internet Small Computer System Interface ( iSCSI) initiator is software or hardware that enables a host computer to send data to an external iSCSI-based storage array through an Ethernet network adapter over a Transmission Control Protocol ( TCP)-based Internet Protocol ( IP) network. ![]()
0 Comments
Leave a Reply. |