Nitrogen phytoremediation by water hyacinth (Eichhornia crassipes (Mart.) Solms)

The phytoremediation potential of water hyacinth, Eichhornia crassipes (Mart.) Solms, was examined in two independent studies under nitrogen (N) rates of 0, 40, 80, 100, 150, 200, and 300 ppm. A modified Hoagland solution was added to ponds containing water hyacinths which were rated and measured weekly for 4 weeks. The hyacinths accounted for 60¿85% of the N removed from solution. Net productivity, as measured by dry matter gain, increased with an increase in N rate until 80 ppm. Above that level dry matter productivity was similar. Tissue N increased linearly with dry matter gain, but total nitrogen removal from the water increased exponentially with net dry matter gain or with an increase in canopy cover. The relation between total N in plant tissue and N removal from the water was similar for the two experiments

Community perception of mosquitoes, malaria and its control in Binga and Gokwe Districts, Zimbabwe

A journal article on the importance of community participation in health care initiatives in rural Zimbabwe.The success of community participation in primary health care depends on the peoples’ knowledge, attitudes and practices in relation to the diseases that affect them. Given the changing health care delivery system in Zimbabwe, greater self reliance on the part of affected communities is expected to play a greater role in future. As far as malaria prevention and control is concerned, this is designed to operate in largely marginalized communities which have previously relied on state run control operations. Annual indoor house spraying using residual insecticide remains the main method for malaria control in Zimbabwe but the trend is shifting towards integrated control encompassing the use of personal protection for prevention and environmental and biological means for source reduction of vector mosquitoes. The use of insecticide impregnated bed nets has gained popularity with the World Health Organization as a malaria control measure following successful trials in West and East Africa

The Cholecystectomy As A Day Case (CAAD) Score: A Validated Score of Preoperative Predictors of Successful Day-Case Cholecystectomy Using the CholeS Data Set

Background Day-case surgery is associated with significant patient and cost benefits. However, only 43% of cholecystectomy patients are discharged home the same day. One hypothesis is day-case cholecystectomy rates, defined as patients discharged the same day as their operation, may be improved by better assessment of patients using standard preoperative variables. Methods Data were extracted from a prospectively collected data set of cholecystectomy patients from 166 UK and Irish hospitals (CholeS). Cholecystectomies performed as elective procedures were divided into main (75%) and validation (25%) data sets. Preoperative predictors were identified, and a risk score of failed day case was devised using multivariate logistic regression. Receiver operating curve analysis was used to validate the score in the validation data set. Results Of the 7426 elective cholecystectomies performed, 49% of these were discharged home the same day. Same-day discharge following cholecystectomy was less likely with older patients (OR 0.18, 95% CI 0.15–0.23), higher ASA scores (OR 0.19, 95% CI 0.15–0.23), complicated cholelithiasis (OR 0.38, 95% CI 0.31 to 0.48), male gender (OR 0.66, 95% CI 0.58–0.74), previous acute gallstone-related admissions (OR 0.54, 95% CI 0.48–0.60) and preoperative endoscopic intervention (OR 0.40, 95% CI 0.34–0.47). The CAAD score was developed using these variables. When applied to the validation subgroup, a CAAD score of ≤5 was associated with 80.8% successful day-case cholecystectomy compared with 19.2% associated with a CAAD score >5 (p < 0.001). Conclusions The CAAD score which utilises data readily available from clinic letters and electronic sources can predict same-day discharges following cholecystectomy

Theoretical approaches to charm hadroproduction

SIGLELD:8053.4155(RL--82-027). / BLDSC - British Library Document Supply CentreGBUnited Kingdo

Untangling large-PT hadronic reactions

SIGLELD:8053.4155(RL--83-095) / BLDSC - British Library Document Supply CentreGBUnited Kingdo

A first principles theory of magnetocrystalline anisotropy in metals

SIGLEAvailable from British Library Document Supply Centre- DSC:8053.4153(RAL--89/006) / BLDSC - British Library Document Supply CentreGBUnited Kingdo

A relativistic spin-polarised multiple scattering theory with applications to the calculation of the electronic structure of condensed matter

SIGLEAvailable from British Library Document Supply Centre- DSC:8053.4153(RAL--88-093) / BLDSC - British Library Document Supply CentreGBUnited Kingdo