On “Really” Stoichiometric LiCoO[sub 2]

On really stoichiometric LiCoO2

The Li NMR T1 relaxation time is shown to be a very severe criterion for determining the stoichiometry of LiCoO2. When Co3O4 containing minimum impurity level of paramagnetic ions such as Fe or Ni is used as starting material (together with Li2CO3), a T1 value as long as 18 s is obtained but this requires a rather long thermal treatment for complete elimination of excess Li. Such highly stoichi...

Buridan's Principle 2 Can Asses Really Starve?

1 Buridan's Ass The problem of Buridan's Ass, named after the fourteenth century French philosopher Jean Buridan, states that an ass placed equidistant between two bales of hay must starve to death because it has no reason to choose one bale over the other. With the beneet of modern mathematics, the argument can be expressed as follows. Assume that, at time 0, the ass is placed at position x al...

Cyclooxygenase - 2 Inhibitors Are They Really Atherothrombotic

Background and Summary—Selective cyclooxygenase (COX)-2 inhibitors are increasingly being used in place of “conventional” nonsteroidal anti-inflammatory drugs (NSAIDs). This is because they are just as effective as NSAIDs in relieving arthritic pain and yet less gastrotoxic. However, the cardiovascular safety of selective COX-2 inhibitors has been questioned because they selectively reduce pros...

Stoichiometric Boron-Based Nanostructures

The Multidimensional Stoichiometric Niche

1 Biology Department, Center for Computational and Integrative Biology, Rutgers University, Camden, NJ, United States, 2 Departamento de Ecología, Pontificia Universidad Católica de Chile, Santiago, Chile, 3 Institute of Ecology and Biodiversity, Santiago, Chile, 4 The Santa Fe Institute, Santa Fe, NM, United States, 5 Departamento de Biologia Animal, Instituto de Biologia, Universidade Estadua...