ied from 1 to 500 pi. Plasma samples were obtained from EDTA-treated whole blood. Quantitation of Serum CEA by Radioimmunoassay. CEA levels in sera were determined by Todd-Egan double anti body radioimmunoassay (3) as modified by Laurence et a!. (7), using goat anti-CEA serum (Peanuts 12). CEA levels in plasma were determined either by indirect or direct Hansen Z-gel radioimmunoassay (6), as in...

A short treatment with ethylenedinitrilotetraacetic acid to permeabilize bacteria for various antibiotics or treatment with the ribonucleic acid (RNA) synthesis inhibitor rifampin causes a slow degradation of 50S and 30S ribosomal particles and of the corresponding 23S and 16S ribosomal RNA species (about 25 percent in 1 h). The effects are additive such that the decay is about 50 percent/h if ...

In the title compound, [FeNa(2)(SO(4))(2)(H(2)O)(4)], the Fe(2+) cation is situated on a centre of inversion and is hexa-coordinated by four O atoms from water mol-ecules and two O atoms from two sulfate anions in an octa-hedral geometry. The coordination environment of Na(+) comprises six O atoms in a more distorted octa-hedral arrangement, with Na-O distances between 2.368 (1) and 2.612 (1) Å...

The title compound, silver disodium trimolybdenum(VI) nonaoxide arsenate, AgNa(2)Mo(3)O(9)AsO(4), was prepared by a solid-state reaction at 808 K. The structure consists of an infinite (Mo(3)AsO(13))(n) ribbon, parallel to the c axis, composed of AsO(4) tetra-hedra and MoO(6) octa-hedra sharing edges and corners. The Na and Ag ions partially occupy several independent close positions, with vari...

We studied effects of free copper ion activity and total copper concentration on copper uptake by lettuce from nutrient solution and a model was developed. In ethylenediaminetetraacetic acid and dissolved organic matter treatments, when pH and free copper ion activity were the same, root copper concentration did not change with the total copper concentration. However, at fixed pH and total copp...

Calcium and EDTA interfere with radioimmunoassay of cAMP or acetylated cAMP. Both interferences with the assay of acetylated cAMP can be obviated by including in the buffer 15 mmol of CaCl2 per liter, which at the same time increases the affinity of the antibody by 89%. As a result, antibody can be decreased by 65%. This method requires no prepurification (extraction or chromatography), and no ...

Four-membered ring [PhP(Se)(μ-Se)]2 (Woollins' reagent, WR) reacts with disodium alkenyl-diols followed by in situ ring-closure reaction with appropriate dibromoalkanes affording a series of unusual nine- to fifteen-membered organoselenophosphorus macrocycles bearing the O-P-Se-Cn-Se-P-O or O-P-Se-Cn-O-P-Se linkage.

The enzyme solution (S-100) was prepared by the procedure described in a previous paper.l) The inactivation was carried out at 37°C for 3 hours in the following reaction mixture : 100 mg (0.2 mmoles) of kanamycin or 91mg (0.2mmoles) of ribostamycin in 25ml of water, 4,842mg (8.0mmoles) of disodium ATP trihydrate in 100 ml of 0.8 % sodium bicarbonate, 25 mg (0.03 mmoles) of coenzyme A in 50ml of...

We detected the beta-1,2-mannosyltransferases (beta-1,2-MTs), which participate in the biosynthesis of oligomannosyl side chains in the mannan acid-labile fraction, in a particulate insoluble fractions prepared from Candida albicans NIH B-792 strain cells grown at 27 degrees C and at 37 degrees C in a yeast extract-added Sabouraud liquid medium (YSLM). The beta-1,2-MT VI-6 prepared from the cel...

In the title complex, [Nd(C(10)H(13)N(2)O(8))(H(2)O)](n), each Nd(III) ion is coordinated by six O atoms and two N atoms from one N'-(carboxymethyl)ethylene-diamine--N,N,N'-triacetate (edta) ligand and one water mol-ecule, displaying a bicapped trigonal-prismatic geometry. The edta ligands link the neodymium metal centres, forming polymeric chains running along the a axis of the unit cell. Thes...