951 research outputs found
The use of Hemopure® at Groote Schuur hospital, Cape Town: 4 case studies
Hemopure® is a cell-free haemoglobin solution that is made from bovine haemoglobin that is designed to carry oxygen in the plasma. It is approved for use in South Africa for the treatment of acute surgical anaemia. We describe the use of Hemopure® at a large tertiary hospital in Cape Town where there is a blood bank on the premises. Four patients received Hemopure® during situations of acute, life-threatening anaemia. Two patients were Jehovah’s Witnesses and in two cases the blood bank was not able to find compatible blood due to the presence of antibodies in the patient’s blood. Patients were carefully monitored by the anaesthetists or intensive care staff, who were managing the patient. No adverse reactions were experienced. Hemopure® was indispensable in managing these critically ill patients
New geometry for planar UV written refractive index sensors
We shall present some of our recent results from our work on UV written planar waveguide refractive index sensors. Refractive index of an analyte is measured through the perturbation of an optical mode, interrogation of the modal index is achieved via the reflected spectra from a Bragg grating defined in the same process as the channel waveguide. Here we introduce a new geometry which embraces the benefits of planar technology to realise new integrated devices. The geometry allows several different sensors to be defined on the same substrate each offering complementary information. Such information may include index as a function of penetration depth for surface binding analytes, interrogation wavelength for dispersion analysis, enhanced sensitivity in specific index ranges and temperature compensation. We shall also outline the inherent fabrication advantages and device feature benefits, including a reduction in return loss, spectral artefacts and a suggested reduction in stress induced birefringence. The silica sensing surface opposed to gold used in SPR devices opens new avenues to exploit surface binding. With a marked reduction in complexity and cost these devices may have significant impact in future sensor markets
Macroscopic, Radiographic and Histopathologic Changes of Claws with Laminitis and Laminitis-Related Disorders in Zero-Grazed Dairy Cows
Laminitis and laminitis-related claw disorders are prevalent in zero-grazed dairy cows. Confinement and limited movement influences claw size and shape. Abnormal claw size and shape causes imbalanced body weight distribution on the claws. Claw horn growth and wear is impaired, further aggravating laminitis disorders. The objective of this study was to determine: macroscopic disorders on the claws, as well as radiographic features and histopathologic changes on the claws with laminitis/laminitis-related disorders. A total of 159 dairy cow forelimb and hind limb feet (318 claws) were collected from an abattoir and a slaughter slab around Nairobi, Kenya. The claws were examined for macroscopic abnormalities, dorso-palmar or dorso-plantar radiography done, sagittal claw sections done, corium gross changes observed and corium tissues harvested for histopathology. Macroscopic disorders observed were: sole bruising, claw deformities, heel erosion, subclinical laminitis sole haemorrhages, double soles, chronic laminitis and white line separation. Radiographic changes observed mainly on distal phalanges were dilated vascular channels, irregular margins, exostoses/periostitis, distal phalangeal narrowing and lysis. Histopathologic changes in the corium included arterio-venous shunts, vascular wall rupture and thickening, vascular proliferation and thrombosis, corium and connective tissue oedema, degeneration, haemorrhages and spongiosis. Hence macroscopic, radiographic and histopathologic changes in laminitis claws affect locomotion
Letter from James B. Brooke & M.F. Brooke to James B. Finley
The Brookes have suffered a great deal of ill health during the past fall. They write to thank Finley for his kind letters and remembrances. Abstract Number - 354https://digitalcommons.owu.edu/finley-letters/1552/thumbnail.jp
Letter from James B. Brooke & M.F. Brooke to James B. Finley
Grandson James warns Finley that he should take care of his health since he is no longer a young man. He apologizes for not having written sooner and then writes news of the family (wife is Margaret Fisher Brooke). Many have suffered from bilious attacks but are generally well now. He plans to go home about the first of April. Abstract Number - 275https://digitalcommons.owu.edu/finley-letters/1273/thumbnail.jp
Early detection of problem implants using infrared thermography
Thermal imaging of feedlot cattle ears is a noninvasive diagnostic tool that aids in identifying properly placed or abscessed growth-promoting implants. Thirty-two calves were used to determine if abscessed and normal, functional implants could be identified and differentiated using infrared thermography. Infrared images were taken at implantation on days 2, 4, 7, 14, and 21 after implantation. Abscessed implants were easily identified. Use of thermal imaging can verify implant administration and, thus, has the potential to immediately impact feedlot quality assurance programs
An infected enlarging abdominal aortic aneurysm after acute cholecystitis
AbstractINTRODUCTIONAn abdominal aortic aneurysm (AAA) infection is rare and can be difficult to manage, with high morbidity and mortality. We present a patient who suffered an infected AAA after undergoing a laparoscopic cholecystectomy and discuss the surgical management options.PRESENTATION OF CASEA 69-year-old male presents with a rapidly enlarging AAA 4 weeks following laparoscopic cholecystectomy. He was managed with open debridement, washout and repair of the aneurysm, but suffered ongoing sequelae of Escherichia coli sepsis.DISCUSSIONThe options for surgical management of infected AAA include open, endovascular and combined approaches. Recent papers report successful use of endovascular repair of infected AAAs but this is an ongoing area of research.CONCLUSIONInfection of an AAA is associated with high mortality and long-term morbidity and requires optimal treatment. Surgical options include open debridement and repair, endovascular aneurysm repair (EVAR) or a combined approach
Syntheses, structures, and infrared spectra of the hexa(cyanido) complexes of silicon, germanium, and tin
The rare octahedral EC6 coordination skeleton type is unknown for complexes with coordination centers consisting of group 14 elements. Here, the first examples of such EC6 species, the hexacoordinate homoleptic cyanido complexes E(CN)62–, E = Si, Ge, Sn, have been synthesized from element halides SiCl4, GeCl4 and SnF4 and isolated as salts with PPN counterions (PPN+ = (Ph3P)2N+) on a scale of 0.2–1 g. Characterization by spectroscopic techniques and by structure determination through single crystal crystallographic methods show that these pseudohalogen complexes have effective octahedral symmetry in solution and in the solid state. Infrared spectra obtained in solution reveal that the T1u symmetric IR-active vibrations in all three complexes have unusually small oscillator strengths. The observed reluctance of Si(CN)62–, Ge(CN)62–, and Sn(CN)62– to form from chloro-precursors was rationalized in terms of Gibbs free energies, which were found by ab initio calculations at the CCSD(T)-F12b/aug-cc-pVTZ(-PP)-F12 level of theory to be small or even positive. The work demonstrates that E(CN)62– complexes of silicon, germanium and tin are in fact stable at room temperature and exist as well-defined units in the presence of noncoordinating counterions. The results add to our understanding of the chemistry of pseudohalogens and structure and bonding
Dakota Gold®-brand dried distiller’s grains with solubles: effects on finishing performance and carcass characteristics
A 153-day trial was conducted using
345 heifers to determine optimal level of
Dakota Gold dried distiller’s grains with
solubles (DDGS) in finishing diets based
on steam-flaked corn. Diets contained six
levels of DDGS: 0%, 15%, 30%, 45%,
60%, and 75%. DDGS affected average
daily gain, final weight and hot carcass
weight, all of which increased with 15%
DDGS and then decreased as additional
DDGS was added. Growth performance of
heifers fed 30% DDGS was similar to those
fed no DDGS. In general, heifers were
overfinished, with 61% being Yield Grade
3 or greater and 83% grading Choice or
Prime. Backfat tended to decrease with
addition of DDGS, and kidney, pelvic, and
heart fat and marbling scores tended to be
greatest for intermediate levels of DDGS.
Percentage of carcasses grading Choice or
Prime tended to be lower for heifers fed 60
or 75% DDGS
The influence of age, sex and visual dysfunction on reading ability in school-children
t. Binocular and accommodative dysfunctions affect the efficiency and coordination of the eyes, and
this may impair reading performance. Reading can be evaluated using accuracy and speed measures. In this
study, we searched for evidence that dysfunctions of accommodation (i.e. accommodation insufficiency, IA)
and binocular vision (i.e. convergence insufficiency, CI) and also hyperopia have impact on reading ability.
A sample of 292 children read a text following vision screening. The sample was composed of control children
and children with the conditions: AI; CI and hyperopia. Multilinear regression analysis was used to evaluate
the influence of variables sex, age and visual condition (control, AI, CI and hyperopia) on reading accuracy
and speed. The results showed that ~7% of the variation in reading accuracy was explained by a model where
age (p=0.001), and presence of AI (p<0.001) and hyperopia (p=0.019) were statistically significant. On the
other hand, ~38% of the variation in the index of speed was explained by age alone (p<0.001). These results
confirm the importance of age on children’s ability to read, and suggests that AI and hyperopia, but not CI
may affect reading accuracy. Reading speed does not appear to be affected by the presence of binocular or
accommodative dysfunction.This work was supported by the Portuguese Foundation
for Science and Technology (FCT) in the framework of
the Strategic Funding UID/FIS/04650/2013
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