28 Result(s)
within
J M Vincent
English
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Article
Improved antibiotic-free plasmid vector design by incorporation of transient expression enhancers
Methods to improve plasmid-mediated transgene expression are needed for gene medicine and gene vaccination applications. To maintain a low risk of insertional mutagenesis-mediated gene activation, expression-a...
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Chapter and Conference Paper
Visualization of Distributed Applications for Performance Debugging
This paper presents a method to perform visualisations of the behaviour of distributed applications, for performance analysis and debugging. This method is applied to a Java distributed application. Applicatio...
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Chapter and Conference Paper
The Feasibility of a CCD for an Astrometric Refractor
The 0.5m refracting telescope of the Van Vleck Observatory has been active in the determination of trigonometric parallaxes since its first observations in 1922. Its lenses were ground by C.A.R. Lundin of the ...
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Chapter
Image Feature Location in Multi-Resolution Images Using a Hierarchy of Multilayer Perceptrons
This chapter describes work undertaken at BT Laboratories to produce a system, based on the use of neural network feature detectors, to robustly locate and track features in digital image sequences. We have co...
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Chapter
A VLSI Architecture for Implementing Neural Networks with On-Chip Backpropagation Learning
In this chapter the development of a CMOS integrated circuit known as HANNIBAL (hardware architecture for neural networks implementing backpropagation algorithm learning) [1] is described. The chip can be used...
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Chapter
Finite Wordlength, Integer Arithmetic Multilayer Perceptron Modelling for Hardware Realization
The implementation in hardware of neural networks such as the MLP raises questions concerning the representation of the parameters of the network. If an analogue implementation is being contemplated, it is nec...
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Chapter
The Role of Legume, Rhizobium, and Environment in Nitrogen Fixation: Constraints on Symbiotic Potential and their Removal
Any research on the legume-Rhizobium symbiosis should involve rhizobiologists and agronomists. In this paper, the need for close cooperation is stressed. The effect of each component of the symbiosis — legume, rh...
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Chapter
Ecological Aspects of the Root-Nodule Bacteria: Competition and Survival
A number of environmental factors interact with rhizobia in their symbiosis with legumes. Although greenhouse and light-troom experiments can be useful in studying some of these factors, extrapolation to field...
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Article
Reproductive capacity of bacteroids in nodules of Trifolium repens L. and Glycine max (L.) Merr.
Reproductive growth of intracellular bacteria from isolated protoplasts in nodules of clover and soybean was directly investigated using a microchamber with visual and video recording. Differentiated bacteriod...
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Chapter
Bacteroid “Reproduction” - Fact or Fiction
The controversy on reproduction of bacteroids has been revived recently. In this report the term “bacteroid” is restricted to bacteria within cells of legume root nodules.
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Article
Sterilization of peat by gamma radiation
The effect of gamma-radiation on the survival of microorganisms has been quantified for the natural population of two types of peat. Data for several microbial types have been separately determined by regular ...
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Article
Preliminary study of taxonomy ofAzotobacter andAzomonas by using rocket line immunoelectrophoresis
Rocket line immunoelectrophoresis was used to study the taxonomy ofAzotobacter andAzomonas assessed by reaction with antiserum to the AVO2 strain ofAzotobacter. Forty-five cultures, comprising seventeen species i...
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Article
Factors responsible for the curling and branching of clover root hairs by Rhizobium
The branching of clover root hairs was due to a factor (or factors) readily extracted from cells of Rhizobium trifolii and found in seedling solution supporting clover roots inoculated with this organism. Part of...
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Article
Competition amongst rhizobial strains for the colonization and nodulation of two tropical legumes
Paired rhizobial strains supplied in several proportions were used to study inter-strain competition in association with Macroptilium atropurpureum (DC) URB (siratro) and Stylosanthes guianensis (Aubl.) Swartz (S...
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Article
Competition between an introduced strain and native Uruguayan strains of Rhizobium trifolii
The relative success of a commercial strain (TA1) competing with ineffective Uruguayan strains of Rhizobium trifolii for the colonisation of the root surface and in forming nodules has been tested with Trifolium ...
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Article
Loss of agglutinating specificity in stock cultures of Rhizobium meliloti
Several strains of Rhizobium meliloti which have been subcultured for 23–33 years have changed from being markedly specific in their somatic agglutination reactions to become widely cross-reactive. On the other h...
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Article
Group antigens in slow-growing rhizobia
Internal group antigens of several slow-growing and fast-growing Rhizobium strains were tested by gel-diffusion against antisera to three strains of Rhizobium japonicum. At least one, generally two common antigen...
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Article
Methods of detection and estimation of rhizobia in soil
The plant-infection technique for the estimation of rhizobia, in which small-seeded hosts are grown on agar within test-tubes, is applicable to soils with a moderate rhizobial population (in the order of at le...
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Article
Strontium as a Substituted Structural Element in Cell Walls of Rhizobium
PREVIOUS reports1,2 on the calcium requirement of a strain of Rhizobium trifolii have shown that bacteria deprived of this element during growth changed from normal rods to swollen, spherical bodies with weakened...
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Article
Polysaccharide Fractions and Transformations in Rhizobium
OUR interest in the composition of rhizobial gums1,2 led of to attempt transformations using, first a preparation based on that of Ljunggren3 and later the cruder, and therefore deoxyribonucleic acid-rich, fracti...
