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Articles by D. Wright
Total Records ( 8 ) for D. Wright
  A.B. Siddique and D. Wright
  Harvesting seed crops of peas (Pisum sativum L.) at different moisture content provided evidence that seed vigour appeared after physiological maturity and continued until some time after physiological maturity and then declined as harvesting was delayed. It was observed that seed vigour was highest when seed moisture content was lowest. The results of the present study provided contrasting evidence against Harrington’s hypothesis about seed longevity and deterioration as maximum seed quality was not attained at physiological maturity and this did not start deteriorating after physiological maturity.
  A.B. Siddique and D. Wright
  Post harvest management i.e. drying seed crops at different drying times and temperatures studies showed that pea seeds (Pisum sativum L.) were very sensitive to either high drying temperatures or longer drying times. Drying temperatures of 40, 60, 80 and 100oC were tested. It was found that only 40oC was suitable for pea seeds.
  D. Flanagan , E. Moore , S. Baker , D. Wright and P. Lynch
  Aims  At any given time, people with diabetes occupy approximately 510% of acute hospital beds. In addition, diabetes is associated with a greater length of stay (LOS). This is partially because of increased complexity of the cases but also because of unfamiliarity of dealing with the condition by other specialist teams.

Methods  In 2002, with increasing pressure on acute hospital beds, a team was established to improve the care of inpatients with diabetes admitted to Derriford Hospital. The team consisted of five diabetes specialist nurses dedicated to inpatient care, supported by a consultant and specialist registrar diabetologist. A link nurse responsible for diabetes was appointed on every ward and each individual with a diagnosis of diabetes was identified on admission. We have compared LOS of all patients with diabetes admitted between January 2002 and December 2006.

Results  LOS fell from a mean  se of 8.3  0.18 days in 2002 to 7.7  0.10 days in 2006 (P = 0.002). Significant falls were seen for emergency admissions (9.7  0.23 vs. 9.2  0.20, P < 0.001) but not elective admissions. The data show significant reductions in LOS for medical admissions (9.2  0.24 vs. 8.4  0.20, P < 0.001) but not surgical admissions. Over the same period, LOS for the total hospital population fell by 0.3 days (P < 0.001).

Conclusion  In conclusion, a team specifically employed to focus on inpatient diabetes care has a significant impact on LOS of this patient group.

  N. Hex , C. Bartlett , D. Wright , M. Taylor and N.D. Varley
  Aims  To estimate the current and future economic burdens of Type 1 and Type 2 diabetes in the UK.

Methods  A top-down approach was used to estimate costs for 2010/2011 from aggregated data sets and literature. Prevalence and population data were used to project costs for 2035/2036. Direct health costs were estimated from data on diagnosis, lifestyle interventions, ongoing treatment and management, and complications. Indirect costs were estimated from data on mortality, sickness, presenteeism (potential loss of productivity among people who remain in work) and informal care.

Results  Diabetes cost approximately £23.7bn in the UK in 2010/2011: £9.8bn in direct costs (£1bn for Type 1 diabetes and £8.8bn for Type 2 diabetes) and £13.9bn in indirect costs (£0.9bn and £13bn). In real terms, the 2035/2036 cost is estimated at £39.8bn: £16.9bn in direct costs (£1.8bn for Type 1 diabetes and £15.1bn for Type 2 diabetes) and £22.9bn in indirect costs (£2.4bn and £20.5bn). Sensitivity analysis applied to the direct costs produced a range of costs: between £7.9bn and £11.7bn in 2010/2011 and between £13.8bn and £20bn in 2035/2036. Diabetes currently accounts for approximately 10% of the total health resource expenditure and is projected to account for around 17% in 2035/2036.

Conclusions  Type 1 and Type 2 diabetes are prominent diseases in the UK and are a significant economic burden. Data differentiating between the costs of Type 1 and Type 2 diabetes are sparse. Complications related to the diseases account for a substantial proportion of the direct health costs. As prevalence increases, the cost of treating complications will grow if current care regimes are maintained.

  A.B. Siddique and D. Wright
  Post harvest management i.e. drying seeds at different drying methods (floors) studies were performed in an unheated glasshouse of the University of Wales, Bangor, United Kingdom. Seeds were air dried on different floors, made of concrete, cowdung and soil. It was observed that concrete drying floor was suitable to maintain seed quality (viability and vigour) for pea seeds (Pisum sativum L.).

  M. Ahsan and D. Wright
  Heterotic effects in spring wheat was investigated using the six basic generations (P1, P2, F1, F2 and back crosses, BC1 and BC2) of cross between Alexandria (salt sensitive) and KRL1-4 (salt tolerant) varieties. Heterotic effects were greatly pronounced as F1, means fall outside the parental range for all physiological and most of the agronomic traits except number of spikes per plant and average grain weight. The significantly different estimates of the dominance components in F2 for Na+, K+, K+/Na+ ratio, number grains per spikes and grain weight per spike than that obtained from F1 indicate spurious overdominance exhibited by the F1 generation for these traits. Gene dispersion or non-allelic interaction or involvement of modifier are suggested from the transgressive segregation in the F2 population. It is also suggested from the F2 population frequency distributions for all traits that they were quantitatively inherited.
  M. Ahsan and D. Wright
  The experiment was conducted to compare two systems (hydroponic and soil culture). Seven wheat varieties differing in salt tolerance were grown under saline conditions (100 mol m–3 NaCl) in these two systems. Ion contents (Na+, K+, CI‾, Ca2+ and Mg2+ ) in the fourth leaf were not correlated with ion contents in the flag leaf. There were few significant correlation coefficients between ion contents and grain weight per plant. Which suggests that ion contents in leaf sap may not be good indicators of salt tolerance in wheat. Linear correlation coefficients for grain yield, most of yield components and ion contents of seven wheat varieties between hydroponic and soil culture were non-significant. These results suggest that hydroponic culture system is independent from soil culture system.
  M. Ahsan and D. Wright
  Three wheat varieties (Kharchia-65, KRL 1-4and Alexandria) were tested for their salt tolerance at 125 mol m3 NaCl salinity. Inter- and intra-varietal variations in these wheat varieties were also investigated for ion contents (Na+, K+, CI), K+ /Na+ ratio, yield and yield components under saline conditions. Although environmental conditions were uniform , but variability within varieties was found to higher than the variability between varieties. KRL1-4 was found salt tolerant than Kharchia-65 and Alexandria under saline conditions. These inter-and intra-varietal variations suggested that improvement for salt tolerance might be achieved through selection from within already existing varieties and, or by crossing salt tolerant and salt sensitive wheat genotypes.
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