Polyamines such as spermidine (Spd) and spermine (Spm), produced by aminopropyltransferase (Apt), play roles in cell growth and differentiation. A sensitive and simple fluorometric high-performance liquid chromatographic determination for Apt activity of spermidine synthase (Spdsyn) and spermine synthase (Spmsyn) was developed in order to examine cellular functions of polyamine synthesis. The d...

We studied the formation of d(A-T)n cruciforms in E.coli cells by probing intracellular plasmid DNA with chloroacetaldehyde followed by fine analysis of modified DNA bases. d(A-T)16 sequences were inserted into specifically designed plasmids either upstream of a single trc promoter, or between two divergent trc promoters. We found that in both cases, induction of transcription by IPTG leads to ...

In this paper, a case is made for linking a Computer Algebra System into Computer Aided Assessment systems. It is argued that such a link will signi cantly reduce the restrictions that CAA packages otherwise impose on educators. A CAA package based on a CAS, i.e. AIM, is used to illustrate the advantages and the possibilities that emerge from more intelligent CAS. A variety of uses within a lea...

In preparing this review an attempt was made to establish some sort of meaningful outline that would serve as a guide in arranging the varied auditory research to be reported upon. For this purpose, it appeared that the most satisfactory approach would be in terms of the functions of the auditory system as it serves as an information processing device. With this arrangement both behavioral and ...

The use of zeolites for the adsorption of harmful gases has widened [1, 2]. In [2] we have studied the ionic states, motional behavior and binding degrees of SO2 and CO2 reacted with type 5A (CaA) zeolite, and we have concluded that SO2 is adsorbed on the surfaces while CO2 is absorbed in the deep pores of this zeolite. In the present work the binding states of CO2 on the same zeolite was inves...

easyJet is the UK largest airline, in terms of ATMs and passengers carried. In it 2008 Annual Report and Accounts it reported operating a fleet of 165 aircraft, flying a total of 380 routes between 100 European and African airports. Over the last 12 months, easyJet has carried 45 million passengers – and as such, it will be significantly affected by the outcome of this consultation and has a co...

This item was submitted to Loughborough University's Institutional Repository by the/an author. Citation: QUDRAT-ULLAH, H., 2006. System dynamics based learning environments: a technology for decision support and assessment. IN: Danson, M. (ed.). 10th CAA International Computer Assisted Assessment Conference : Proceedings of the Conference on 4th and 5th July 2006 at Loughborough University. Lo...

9-(2-Phosphonylmethoxyethyl)adenine (PMEA), (S)-9-(3-hydroxy-2-phosphonylmethoxypropyl)adenine (HPMPA), and (R,S)-9-(3-fluoro-2-phosphonylmethoxypropyl)adenine (FPMPA) are selective antiviral agents with activity against a broad spectrum of DNA viruses and retroviruses. A highly sensitive method has been developed to determine concentrations of these compounds in human plasma. Plasma samples co...

The bacterial degradation and detoxification of chlorinated xenobiotic compounds requires the production of enzymes that are capable of recognizing and converting compounds which do not occur at significant concentrations in nature. We have studied the catabolic route of 1,2-dichloroethane as an example of a pathway for the conversion of such a synthetic compound. In strains of Xanthobacter and...

With the growing trend in many subjects to deliver at least some part of examinations by computer, it is important to know whether there are any differences in the results obtained by candidates sitting examinations taken by computer compared to those obtained by candidates sitting conventional examinations using pen and paper. The purpose of this paper is to describe a pilot project to compare...