1,739,390 research outputs found
The roots of γ<SUB>n</SUB>(λη)J<SUB>n</SUB>(λ)–J<SUB>n</SUB>((λη) γ<SUB>n</SUB>(λ) = 0
No full textCylinder functions, Jn(λx), of integral orders which vanish at x = 1 and x = η (where η is an assigned positive constant less than 1) occur in the solution of many problems in applied mathematics. Such functions can be expressed in terms of the Bessel functions Jn(x) and γn(x) of the two kinds in the form
Jn(λx)=Yn(λη)Jn(λx)-Jn(λη)Yn(λx)
Yn(λη)Jn(λ)-Jn(λη)Yn(λ)=
Determining the need for an expanded fitness component in the Fire Science Program at Milwaukee Area Technical College
Full text linkIncludes bibliographical references
EC71-955 Sugar Cookery
Full text linkExtension Circular 71-955 is about different ways various ways to cook sugar to create certain types of candy
Bacteriophage λ p gene shows host killing which is not dependent on λ DNA replication
Full text linkBacteriophage λ having a mutation replacing glycine by glutamic acid at the 48th codon of cro, kills the host under N- conditions; we call this the hk mutation. In λN-N-cl-hk phage-infected bacteria, the late gene R i expressed to a significant level, phage DNA synthesis occurs with better efficiency, and the Cro activity is around 20% less, all compared to those in λN-N-cl-hk+-infected bacteria. Segments of λ DNA from the left of pR to the right of tR2, carrying cro, cll, O,P, and the genes of the nin5 region from the above hk and hk+ phages, were cloned in pBR322. Studies with these plasmids and their derivatives having one or more of the λ genes deleted indicate that the hk mutation is lethal only when a functional P gene is also present. When expression of P from pR is elevated, due to the deletion of tR1, host killing also occurs without the hk mutation. We conclude that the higher levels of P protein, produced either (1) when cro has the hk mutation or (2) when tR1 is deleted, are lethal to the host. We also show that due to the hk mutation, the Cro protein becomes partially defective in its negative regulation at pR, resulting in the expression of P to a lethal level even in the absence of N protein-mediated antitermination. This P protein-induced host killing depends neither on λ DNA replication nor on any other gene functions of the phage
Properties of polylysogens containing derepressed λN<SUP>-</SUP> prophages : III. A large number of intergrated λ prophages
No full textStable λN-cI- lysogens contain 20-25 copies of the λ genome per bacterial genome. Less than 10% of the λ genomes occur as closed circular plasmids. The remaining λ genomes can not be separated from the bacterial DNA by centrifugation in neutral sucrose. We suggest that the bacterial chromosome contains several tandemly integrated prophages which replicate at a higher rate than the remainder of the chromosome
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Kolozsvár - Klinikák : levelező-lap (955)
No full textKolozsvár - Klinikák [material iconografic] : levelező-lap (955). - Kolozsvár : Ujhelyi és Boros kiadása, [19--?]. - 1 ilustrată : alb-negru ; 9x14 c
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