Compared to the envelope model, the inner envelope model is based on a different construction and it can produce substantial efficiency gains in situations where the envelope model offers no gains. In effect, inner envelopes open a new frontier to the way in which reducing subspaces can be used to improve efficiency in multivariate problems.”
“Recent increases in antibody titers have generated renewed interest in lower-cost continuous chromatographic processes for antibody purification. The objective

of this study was to design, build, and test a continuous countercurrent tangential chromatography system in which the resin GDC-0941 (in the form of a slurry) flows sequentially through a series of static mixers and hollow fiber membrane modules to accomplish the binding, washing, elution, stripping,

and equilibration steps in continuous operation with true countercurrent staging. Experimental studies were performed for the purification of an IgG(4) monoclonal antibody from a model feed containing bovine serum albumin and myoglobin using a protein A affinity resin. Batch uptake / desorption experiments were used in combination with critical flux filtration data to design the continuous countercurrent tangential chromatography system. The process was stable during continuous operation, providing the IgG(4) at 94% yield with greater than 97% purity. The antibody productivity was more than 40g protein per liter of resin per hour, which is significantly GSK2879552 solubility dmso greater than can be obtained using conventional packed columns. The results clearly demonstrate the potential of using continuous countercurrent tangential chromatography for large-scale antibody purification.”
“Introduction\n\nAs rates of childhood obesity rise, the nutritional content of lunches CBL0137 in vivo eaten at

school is more heavily scrutinized. We examined the association between dietary behaviors and the number of days that adolescents bring lunch to school.\n\nMethods\n\nWe analyzed cross-sectional data for 2,774 adolescents who responded to the 2005 California Health Interview Survey and reported dietary behaviors for a weekday.\n\nResults\n\nIn bivariate analyses, adolescents who typically brought their lunch from home 5 days per week ate fast food on fewer occasions; consumed fewer servings of soda, fried potatoes, and high-sugar foods; and ate more fruit and vegetables compared with adolescents who never brought their lunch to school. In linear regressions controlling for demographics, body mass index, desire to change weight, parent education, and adult presence after school, students who typically brought their lunch to school 5 days per week ate fast food 0.35 fewer times and consumed 0.35 fewer servings of soda, 0.10 fewer servings of fried potatoes, 0.25 fewer servings of high-sugar foods, and 0.95 more servings of fruit and vegetables per day compared with students who never brought their lunch to school.