We discuss a new method to treat the K → ππ amplitude dispersively, taking into full account the effects of final state interatcions. Our approach is based on a set of dispersion relations for the K → ππ amplitude, in which the weak Hamiltonian carries momentum. In these dispersion relations two subtraction constants have to be introduced, whereby one can be related via a soft pion theorem to t...

Measurements have been made of the solubility at 25 degrees C. of tyrosine in hydrochloric acid and in sodium hydroxide solutions varying from 0.001 to 0.05 M, and also in distilled water. The pH of the saturated solutions was measured with the hydrogen electrode. The following values for the ionization constants of tyrosine have been obtained from the measurements: k(b) = 1.57 x 10(-12), k(a1)...

where K, γ are constants. This is not true always, but is in certain limits we will consider later. For specific type of gas (or whatever), we have different K and γ. This is where microscopic physics comes in. We continue the discussions at the level of macroscopic physics with K and γ taken as some constants, and come back to their specific values for the case of degenerate fermions later. Th...

We determine the full structure of the leading (double-pole) divergences of O(p 6) in the meson sector of chiral perturbation theory. The eld theoretic basis for this calculation is described. We then use an extension of this result to determine the p 6 contributions containing double chiral logarithms (L 2), single logarithms times p 4 constants (LL r i) and products of two p 4 constants (L r ...

The objective of this investigation is to evaluate the hydroxyl radical (˙OH) generation using nanoporous activated carbon (NPAC), derived from rice husk, and dissolved oxygen in water. The in situ production of the ˙OH radical was confirmed through the DMPO spin trapping method in EPR spectroscopy and quantitative determination by a deoxyribose assay procedure. NPAC served as a heterogeneous c...

We present work in progress on the computation of the K-meson vector and tensor decay constants, as well as the B-parameter in Kaon oscillations. Our simulations are performed in a partially quenched setup, with two dynamical (sea) Wilson quark flavours, having a maximally twisted mass term. Valence quarks are either of the standard or the Osterwalder-Seiler maximally twisted variety. These two...

The partitioning of polypeptides into nanoscale transmembrane pores is of fundamental importance in biology. Examples include protein translocation in the endoplasmic reticulum and the passage of proteins through the nuclear pore complex. Here we examine the exchange of cationic alpha-helical peptides between the bulk aqueous phase and the transmembrane beta-barrel of the alpha-hemolysin (alpha...

Certain of the kinetic properties of carboxypeptidase B have been described in the previous papers of this series (1, 2). The experimental constants, K, and ko,l were determined with a number of substrates, and the enzyme-inhibitor dissociation constants were evaluated with several competitive inhibitors. The present studies were undertaken in an effort to obtain knowledge of the affinity of ca...

Apo-glucose dehydrogenase existing in Escherichia coli is converted to the holoenzyme with exogenous pyrroloquinoline quinone (PQQ) and Mg(2+). Catalytic behaviour of the E. coli cells with the holoenzyme is characterized by a Michaelis-Menten-type equation with a catalytic constant of the cell and apparent Michaelis constants for D-glucose and an artificial electron acceptor added to the E. co...