An "in vivo" assay for the detection of mutants negative to CRM (cross-reacting material) is described. l-Arabinose-negative mutants of Escherichia coli B/r were grown on Casamino Acids-l-arabinose plates to which a 3-ml agar layer, containing antiserum to the l-arabinose-binding protein (ABP), had been applied. After incubation and partial lysis of the clones "in situ," the plates were refrige...

Two immunochemically distinct mucins have been isolated from pig submaxillary glands. The glands were combined according to the ability of aqueous extracts of these glands to inhibit hemagglutination of human type A erythrocytes. Mucin isolated from the glands containing blood group A activity is designated A+ pig submaxillary mucin (A+-PSM), while mucin isolated from the remaining glands is de...

The methodology for deoxyribonucleic acid-mediated transformation of Spirillum lipoferum to resistance to various antimicrobial agents is reported.

For (G,+) a finite abelian group the plus-minus weighted Davenport constant, denoted D±(G), is the smallest l such that each sequence g1 . . . gl over G has a weighted zero-subsum with weights +1 and −1, i.e., there is a non-empty subset I ⊂ {1, . . . , l} such that ∑ i∈I aigi = 0 for ai ∈ {+1,−1}. We present new bounds for this constant, mainly lower bounds, and also obtain the exact value of ...

We compared low-density lipoprotein cholesterol (LDL) values obtained by the Friedewald formula--i.e., total cholesterol minus high-density lipoprotein (HDL) cholesterol minus very-low-density lipoprotein (VLDL) cholesterol (estimated as triglyceride divided by 5)--with those obtained by lipoprotein fractionation, using 4736 specimens. When triglycerides were less than 2.0 g/L, greater than 90%...

In this paper we study the (minus-)generator A p of the C 0-semigroup e A p t on L p (X;) associated with a classical symmetric diiusion form E in L 2 (X;), on a (innnite dimensional) locally convex state space X endowed with a nite diierentiable Borel measure. It is a standard fact that E associates a C 0 sub-Markovian semigroup of contractions on L 2 (X;) and the semigroup interpolates to all...