Line graphs and 22-geodesic transitivity

For a graph $\Gamma$, a positive integer $s$ and a subgroup G\leq \Aut(\Gamma), we prove that $G$ is transitive on the set of $s$-arcs of $\Gamma$ if and only if $\Gamma$ has girth at least $2(s-1)$ and $G$ is transitive on the set of $(s-1)$-geodesics of its line graph. As applications, we first prove that the only non-complete locally cyclic $2$-geodesic transitive graphs are the complete multipartite graph $K_{3[2]}$ and the icosahedron. Secondly we classify 2-geodesic transitive graphs of valency 4 and girth 3, and determine which of them are geodesic transitive

Leadership and Life Skills Education Centre

Special Studies Experience, Summer 2012 -- San Jose, Costa Rica -- Partner Agencie(s): Retro Juvenil Internacionalhttp://deepblue.lib.umich.edu/bitstream/2027.42/110199/1/Poster_Hsaio.pd

Enzyme and Reaction Engineering in Biocatalysis: Synthesis of (S)-Methoxyisopropylamine (= (S)-1-Methoxypropan-2-amine)

Methoxyisopropylamine is a chiral amine moiety common to the chemical structures of two important chloroacetamide herbicides, metolachlor and dimethenamid. The activity of both products lies predominantly in their (S)-enantiomeric forms. Celgro scientists have developed a high-productivity biocatalytic process to (S)-methoxyisopropylamine via transamination of methoxyacetone and isopropylamine. Biocatalyst and process optimization was achieved by integration of molecular biology, fermentation, enzymology, and engineering disciplines to identify and overcome kinetic, stability, and thermodynamic constraints on productivity. The result was a 50° vacuum reaction producing 2M (S)-methoxyisopropylamine (18 wt-%) at >99% ee, with 97% conversion of methoxyacetone in 7 h, meeting economic targets applicable to agrochemical manufacturing

Isolation Of Cellulose from waste paper for the preparation of cellulosic beads

Cellulose had been extracted from wastepaper through pretreatment, deinking and dissolution process for the preparation of cellulose beads. After dissolution of cellulose, regeneration of cellulose beads was conducted by water-in-oil emulsion. Cellulose solution was added drop by drop into the water-in-oil emulsion to form cellulose beads. The sizes of the cellulose beads were controlled by concentration of cellulose solution and concentration of surfactant. The physical and chemical properties of the cellulosic fibers and beads were investigated by FTIR and SEM. FTIR had been used to determine the presence of cellulose in cellulose beads. The surface morphology of the cellulose beads was characterized by SEM