Several thymidine diphosphate sugar compounds have been isolated from Escherichia coli strains and other microorganisms. TDP-X, isolated from E. coli strain Y-10 by Strominger and Scott (1) and from other strains of E. coli (2) and TDP-X2 isolated from E. coli strain B, by Okazaki, Okazaki, and Kuriki (3) are unusual acetamido sugar-containing nucleotides (4). The sugars are 4-acetamido-4,6-did...

Detailed spectroscopic and computational studies of the low-spin iron complexes [Fe(III)(S2(Me2)N3 (Pr,Pr))(N3)] (1) and [Fe(III)(S2(Me2)N3 (Pr,Pr))]1+ (2) were performed to investigate the unique electronic features of these species and their relation to the low-spin ferric active sites of nitrile hydratases. Low-temperature UV/vis/NIR and MCD spectra of 1 and 2 reflect electronic structures t...

In this paper we prove that the coordinate ring of the pinched Veronese (i.e k[X, XY, XY , Y , XZ, Y Z, XZ, Y Z, Z] ⊂ k[X, Y, Z]) is Koszul. The strategy of the proof is the following: we can consider a presentation S/I where S = k[X1, . . . , X9]. Using a distinguished weight ω, it’s enough to show that S/inωI is Koszul. We write inωI as J + H where J is generated by a Gröbner basis of quadric...

The paper presents a systemic approach of a walking robot behavior and control in uncertain environments, with application to a hexapod robot. For simplicity, this paper considers only the vertical xz-plane evolution taking into account that the structure is symmetrical in the horizontal xy-plane and the results can be easily extended. Based on the mathematical model of the robot, determined co...

Compared to Ru single atom catalyst, hetero-RuM (M = Fe, Os, and Ir) double catalysts showed improved N 2 RR activity with the help of d xz xy bonding orbital, caused by strain, dopant configurational effects.