Tetanus is an important disease which created by tetanospasmin toxin of Clostridium tetani. In this study we surveyed six important factors including LF, KF, MLD, pH, OD and total protein assay of Harvard 52 (H52), G5 (HG5) and 49205 (H49205) strains of the bacterium to determine which of them were more suitable for use in vaccine production. The mentioned strains were seperatedly reactivated i...

Avian infectious bronchitis is an acute and highly contagious disease that mainly causes respiratory symptoms in poultry. A number of serotypes and variants of the viral agent with poor cross-protection are the major problem to achieve desired immunity from vaccination. The S1 subunit of S glycoprotein (spike) is the major determinant of IBV so that a minor change in amino acid sequence of this...

tetanus is an important disease which created by tetanospasmin toxin of clostridium tetani. in this study we surveyed six important factors including lf, kf, mld, ph, od and total protein assay of harvard 52 (h52), g5 (hg5) and 49205 (h49205) strains of the bacterium to determine which of them were more suitable for use in vaccine production. the mentioned strains were seperatedly reactivated i...

avian infectious bronchitis is an acute and highly contagious disease that mainly causes respiratory symptoms in poultry. a number of serotypes and variants of the viral agent with poor cross-protection are the major problem to achieve desired immunity from vaccination. the s1 subunit of s glycoprotein (spike) is the major determinant of ibv so that a minor change in amino acid sequence of this...

Federal college financial aid imposes an implicit tax on asset accumulation, which reduces the incentive for families to save. Prior literature has found evidence of large reductions in asset accumulation as a result. This paper finds that these conclusions are over-estimated and are sensitive to the assumptions used in estimating the implicit tax rate. Additionally, the 1992 exemption of home ...

The holographic representation of the entanglement entropy of four dimensional conformal field theories is studied. By generalizing the replica trick the anomalous terms in the entanglement entropy are evaluated. The same terms in the holographic representation are calculated by a method which does not require the solution of the equations of motion or a cut off. The two calculations disagree f...

How Equal Are Educational Opportunities? Family Background and Student Achievement in Europe and the United States This paper estimates the effects of family-background characteristics on student performance in the US and 17 Western European school systems. Family background has strong effects both in Europe and the United States, remarkably similar in size. France and Flemish Belgium achieve t...

The holographic representation of the entanglement entropy of four dimensional conformal field theories is studied. By generalizing the replica trick the anomalous terms in the entanglement entropy are evaluated. The same terms in the holographic representation are calculated by a method which does not require the solution of the equations of motion or a cut off. The two calculations disagree f...

Education Policy and Equality of Opportunity We provide a measure of equality of educational opportunity in 54 countries, estimated as the effect of family background on student performance in two international TIMSS tests. We then show how organizational features of the education system affect equality of educational opportunity. Our model predicts that late tracking and a long pre-school cycl...