catena-Poly[[silver(I)-μ-4-aminopyridine] perchlorate]: a 1-D staircase coordination polymer.

Reaction of 4-amino-pyridine with silver(I) perchlorate leads to a one-dimensional coordination polymer, {[Ag(C(5)H(6)N(2))]ClO(4)}(n), in which the amino-pyridine binds through both N atoms. The perchlorate anion is hydrogen bonded to the amino H atoms and inter-acts weakly with the silver(I) atoms (Ag-O > 2.70 Å), both located on inversion centres, and some aromatic H atoms (O-H > 2.

Bone disease in long-term dialysis.

We reviewed the clinical features, laboratory findings, and skeletal abnormalities of six patients who have been on dialysis therapy for 12 to 20 years (average, 16.7 years). Hemodialysis has been the major therapeutic modality in five of the six individuals.

Birthweight by gestational age and its effect on perinatal mortality in white and in Punjabi births: experience at a district general hospital in West London 1967-1975.

At Hillingdon Hospital in West London two main ethnic groups: 'UK' (i.e. white European) and 'Indian' (i.