The screw feeder design for the pre-compaction of bulk materials to be briquetted in a roll press is considered increase overall reliability. relationship between parameters and its technological characteristics investigated by example two fine-grained materials. A new mathematical model algorithm have been developed, which takes into account properties materials, roller parameters, shape briqu...

The relevance of the study is due to fact that loading granulated polymer material into working hopper extruders mainly carried out manually from bags by production operators. capacity hoppers limited with a significant height bulk material, an increase in static pressure occurs lower layers, which leads formation vaults, uneven supply cylinder and deterioration quality products. Since work pro...

bachgroun: hematopoietic stem cell derived from umbilical cord blood (ucb) has been used for regenerative medicine in hematological abnormalities. micrornas are important regulators of gene expression that control both physiological and pathological processes such as development of tissue and cancer. some studies have shown that mir-33, has a critical role in control of self-renewal cells. here...

Umbilical cord blood (UCB) has been used for transplantation in the treatment of hematologic disorders as a source of hematopoietic stem cells (HSCs). Because of insufficient number of cord blood CD34+ cells, the expansion of these cells seems to be important for clinical application. Mesenchymal stromal cells (MSCs), playing an important role in HSCs maintenance, were used as feeder layer. Apo...

Minimizing variability in the feeding process is important for continuous manufacturing since materials are fed individually and can impact final product. This study demonstrates importance of measuring powder properties highlights need to characterize performance both offline with multiple refills intended configuration equipment. The standard grade hydroxypropyl methylcellulose (HPMC) had mat...

In this study, a quantitative relationship between material properties, process settings and screw feeding responses of high-throughput feeder was established via multivariate models (PLS). Thirteen divergent powders were selected characterized for 44 property descriptors. During volumetric trials, the maximum feed capacity (FCCmax), relative standard deviation on (RSDFCmax), short term variabi...

human diploid fibroblast cells produce a spectrum of necessary growth factors and extracellular matrix (ecm) components essential for growth and proliferation of a variety of other cell types. in this study, the effect of five human embryonic fibroblast cell lines, isolated from liver, lung, skin and foreskin tissues, was investigated. a coculture system analyse was employed to cloning efficien...

A variety of embryonic and adult stem cell lines require an initial co-culturing with feeder cells for non-differentiated growth, self renewal and maintenance of pluripotency. However for many downstream ES cell applications the feeder cells have to be considered contaminations that might interfere not just with the analysis of experimental data but also with clinical application and tissue eng...