1,266,578 research outputs found
Ecoso exchange newsletter 2/1; Dec. 1988
Contents in this issue:
The Ecoso Exchange Story So Far, pg. 1
Ecoso Exchange Newsletter is Now Being Revived, pg. 2
Globalisation of Trade and Planning Education, pg. 3
Ideas on Sustainable Societies, pg. 5
The Rainbow Alliance, pg. 5
The New Left Party, pg. 6
Greenhouse 88, pg. 7
Metropolis 90, pg. 8
Nightmares or Dreams of the Future, pg. 9
The Multi-functional Polis, pg. 9
The Very Fast Train (VFT), pg. 9
B-Double Super Trucks, pg. 9
Links All Around Australia, pg. 10
Iowa Workforce Monthly, November 2010, Issue 19
Highlights:
* New Iowan Center 10th Anniversary
Open House........................................pg. 2
* New ICAP Workforce Services Center
Held Open House.............................pg. 2
* Cedar Rapids IowaWORKS Hosts
Career Fair...............................................pg. 3
* New Hours for Washington
IowaWORKS office.............................pg. 3
* Regional Update.................................pg. 4
* Regional Veteran’s Day Events &
Photos ...............................................pg.
Metabolism of amino acid amides in Pseudomonas putida ATCC 12633
The metabolism of the natural amino acid L-valine, the unnatural amino acids D-valine, and D-, L-phenylglycine (D-, L-PG), and the unnatural amino acid amides D-, L-phenylglycine amide (D, L-PG-NH2) and L-valine amide (L-Val-NH2) was studied in Pseudomonas putida ATCC 12633. The organism possessed constitutive L-amidase activities towards L-PG-NH2 and L-Val-NH2, both following the same pattern of expression, suggesting the involvement of similarly regulated enzymes, or a common enzyme. Quite surprisingly, growth in mineral media with L-PG-NH2 resulted in variable, long lag phases of growth and strongly reduced L-amidase activities. Conversion of D-PG-NH2 into D-PG and L-PG also occurred and could be attributed to the presence of an inducible D-amidase and the racemization of the amino acid amide in combination with L-amidase activity, respectively. The further degradation of L-PG and D-PG involved constitutive L-PG aminotransferase and inducible D-PG dehydrogenase activities, respectively, both with a high degree of enantioselectivity. Amino acid racemase activity for D- and L-PG was not detected.
Transitive and Co-Transitive Caps
A cap in PG(r,q) is a set of points, no three of which are collinear. A cap
is said to be transitive if its automorphism group in PGammaL(r+1,q) acts
transtively on the cap, and co-transitive if the automorphism group acts
transtively on the cap's complement in PG(r,q). Transitive, co-transitive caps
are characterized as being one of: an elliptic quadric in PG(3,q); a
Suzuki-Tits ovoid in PG(3,q); a hyperoval in PG(2,4); a cap of size 11 in
PG(4,3); the complement of a hyperplane in PG(r,2); or a union of Singer orbits
in PG(r,q) whose automorphism group comes from a subgroup of GammaL(1,q^{r+1}).Comment: To appear in The Bulletin of the Belgian Mathematical Society - Simon
Stevi
A characterization of Hermitian varieties as codewords
It is known that the Hermitian varieties are codewords in the code defined by
the points and hyperplanes of the projective spaces . In finite
geometry, also quasi-Hermitian varieties are defined. These are sets of points
of of the same size as a non-singular Hermitian variety of
, having the same intersection sizes with the hyperplanes of
. In the planar case, this reduces to the definition of a unital. A
famous result of Blokhuis, Brouwer, and Wilbrink states that every unital in
the code of the points and lines of is a Hermitian curve. We prove
a similar result for the quasi-Hermitian varieties in , ,
as well as in , prime, or , prime, and
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