To measure the ability of surviving tissue slices to form glucuronides of compounds such as menthol and phenol, Lipschitz & Bueding (1939) determined ether-soluble compounds giving the Tollens colour reaction for glucuronic acid. Whilst this procedure yielded valuable information in their hands, it is inconvenient for routine purposes, and the lack of specificity in the colour reaction can be a...

Background: Approximately one quarter of all nosocomial infections can be attributed to the urinary tract. The infections are supposed to be mainly caused by implantations of urethral catheters and stents. A new catheter design is introduced with the aim to lower the high number of nosocomial urethral infections. In order to avoid limitations to use, the design is first applied to conventional ...

This project was concerned with using self-assembly methods of chemistry and biology to fabricate large structures such as telescope mirrors in space or on the moon or Mars. Both biological and non-biological self assembly methods were considered, as well as methods for coating the resulting structures with silver for the purpose of making mirrors. For biological self-assembly we explored metho...

By way of introduction a brief summary of the conclusions of a previous communication1 may be given. Strophanthidin and all of its derivatives which possess both the la&one group and the double bond of the parent substance reduce Tollens’ reagent and also give a positive nitroprusside reaction. The same has been found to be true of ouabain, gitoxin, and digitoxin. On saponification or hydrogena...

General Structural Characteristics Oxamicetin (I) is a basic antibiotic which crystallizes as a hydrochloride hydrate. Elemental analysis and titration data0 were consistent with a molecular formula of C29H42N6O10for the free base, indicating one additional oxygen atom compared to amicetin. Oxamicetin shows strong absorption in the ultraviolet region with, spectra at various pH values0 very sim...

It is shown how the schema of equivalence can be used to obtain short proofs of tautologies A, where the depth of proofs is linear in the number of variables in A. Eq (A, B, C arbitrary formulas) is the propositional pendant of the schema of identity. It can be argued that, apart form the usual propositional tautologies and inference schemas which are given as axiomatizations of propositional l...

Multi-valued Fredkin gates (MVFG) are reversible gates and they can be considered as modified version of the better known reversible gate the Fredkin gate. Reversible logic gates are circuits that have the same number of inputs and outputs and have one-to-one and onto mapping between vectors of inputs and outputs; thus the vector of input states can be always reconstructed from the vectors of o...