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This column is devoted to partitions of point-sets into convex subsets with interior-disjoint convex hulls. We review some partitioning problems and corresponding algorithms. At the end we list some open problems. For simplicity, in most cases we remain at the lowest possible interesting level, that is, in the plane.
We developed a method, named GraFix, that considerably improves sample quality for structure determination by singleparticle electron cryomicroscopy (cryo-EM). GraFix uses a glycerol gradient centrifugation step in which the complexes are centrifuged into an increasing concentration of a chemical fixation reagent to prevent aggregation and to stabilize individual macromolecules. The method can ...
Daun saliara (Lantana camara L.) termasuk gulma tahunan berbentuk perdu, berkayu dan berakar tunggang. mengandung senyawa aktif minyak atsiri, flavonoid, alkaloid, tanin, saponin merupakan yang bersifat sebagai antibakteri. Penelitian ini bertujuan untuk mengetahui ekstrak etanol daun dapat diformulasikan dalam bentuk sediaan sabun cair memiliki aktivitas antibakteri terhadap Staphylococcus aur...
Human aromatase is responsible for the last step of estrogen biosynthesis, for the aromatization of ring A of androstenedione (ASD) or testosterone. In this work the mechanism of aromatization was studied using gas phase and hybrid QM/MM calculations. It is shown that human aromatase can efficiently catalyze the aromatization process via a Compound I (or Compound II) mediated pathway. The natur...
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