Nigeran (α-1,3-alt-α-1,4-glucan) is a linear glucan with alternating α-1,3- and α-1,4-glycosidic linkages. It extracted from the cell walls of certain species in genera Aspergillus Penicillium. can be esterified used as film, but its strength only approximately 4–25 MPa. However, present study, high-strength nigeran ester films tensile strengths 100 MPa were successfully prepared by thermally s...

The structure of sandramycin, a novel antitumor antibiotic, was established by spectroscopic analysis and chiral chromatography of its acid hydrolysate. It was determined to be a cyclic decadepsipeptide with a two-fold axis of symmetry and 3-hydroxyquinaldic acid as an appended chromophore.

Fold duplexes transfer displacement from a lower to an upper bounding detachment system via trains of folds with broadly parallel geometries. While they have been previously recognised in orogenic systems where are considered be kinematically equivalent imbricating thrust ramps, we here describe the first example gravity-driven fold and (FATS) developed within late-Pleistocene mass transport de...

We show that the query containment problem for monadic datalog on finite unranked labeled trees can be solved in 2-fold exponential time when (a) considering unordered trees using the axes child and descendant, and when (b) considering ordered trees using the axes firstchild, nextsibling, child, and descendant. When omitting the descendant-axis, we obtain that in both cases the problem is Expti...

The complete mol-ecule of the title compound, C(26)H(24)P(2)Se(2), is generated by crystallographic 2-fold symmetry, with the rotation axis bisecting the central C-C bond. The dihedral angle between the terminal aromatic rings is 74.1 (1)°.