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Daniel Johnson
Radioactive sources are used by hospitals, research facilities and industry for such purposes as diagnosing and treating illnesses, sterilising equipment and inspecting welds. Unfortunately, many States, regulatory authorities and licensees may not appreciate how people with malevolent intentions could use radioactive sources, and statistics confirm that a number of security incidents happen around the globe. The adversary could be common thieves, activists, insiders, terrorists and organised crime groups. Mitigating this risk requires well trained and competent staff who have developed the knowledge, attributes and skills necessary to successfully discharge their security responsibilities...
November 24, 2016: Radiation Protection Dosimetry
Paweł Ramos, Barbara Pilawa
Free radicals in thermally treated chloramphenicol were examined by electron paramagnetic resonance (EPR) spectroscopy. The parameters and shape of EPR spectra were analysed and free radical concentrations were obtained in the tested drug samples. Chloramphenicol was thermally sterilised at pharmacopoeia conditions: 100°C (120 minutes). Sterilisation was also carried out at different conditions, 110°C (60 minutes) and 120°C (30 minutes), for comparison with pharmacopeia settings. Microbiological analysis was performed on the samples to confirm sterility...
November 24, 2016: Pharmaceutical Development and Technology
Paddy McQueen
Sterilisation requests made by young, child-free adults are frequently denied by doctors, despite sterilisation being legally available to individuals over the age of 18. A commonly given reason for denied requests is that the patient will later regret their decision. In this paper, I examine whether the possibility of future regret is a good reason for denying a sterilisation request. I argue that it is not and hence that decision-competent adults who have no desire to have children should have their requests approved...
November 22, 2016: Journal of Medical Ethics
Debra B Stulberg, Loretta Cain, Irma Hasham Dahlquist, Diane S Lauderdale
BACKGROUND: Ectopic pregnancy causes significant maternal morbidity and mortality. Complications are more common among women with Medicaid or no insurance compared to those with private insurance. It is unknown whether preventive care prior to pregnancy and prenatal care, which are covered by Medicaid, would decrease complications if they were more fully utilised. METHODS: Medicaid claims were used to identify a clinical cohort of women who experienced an ectopic pregnancy during 2004-08 among all female Medicaid enrolees from a large 14-state population, ages 15-44...
November 16, 2016: Paediatric and Perinatal Epidemiology
Gemma Jones, Anthony Herbert, Helen Berry, Jennifer Helen Edwards, John Fisher, Eileen Ingham
The porcine superflexor tendon (SFT) was identified as having appropriate structure and properties for development of a decellularised device for use in ACL reconstruction. SFTs were decellularised using a combination of freeze thaw and washes in hypotonic buffer and 0.1% (w/v) SDS in hypotonic buffer plus proteinase inhibitors followed by nuclease treatment and sterilisation using peracetic acid. The decellularised biological scaffold was devoid of cells and cell remnants and contained only 13<sup>-1</sup> (dry weight) residual total DNA...
November 2, 2016: Tissue Engineering. Part A
Scott McAlister, Yanjun Ou, Elise Neff, Karen Hapgood, David Story, Philip Mealey, Forbes McGain
OBJECTIVE: To examine the environmental life cycle from poppy farming through to production of 100 mg in 100 mL of intravenous morphine (standard infusion bag). DESIGN: 'Cradle-to-grave' process-based life cycle assessment (observational). SETTINGS: Australian opium poppy farms, and facilities for pelletising, manufacturing morphine, and sterilising and packaging bags of morphine. MAIN OUTCOME MEASURES: The environmental effects (eg, CO2 equivalent ('CO2 e') emissions and water use) of producing 100 mg of morphine...
October 21, 2016: BMJ Open
Andreas Winkelmann
The Anatomische Gesellschaft, an international Germany-based association of anatomists, was closed down in 1945, after the end of the "Third Reich". It was eventually re-founded in 1949, continuing its tradition from its foundation in 1886, based in large part on the membership prior to 1945. Newly available archival material reveals, however, that at least six members were explicitly prevented from re-joining the society. This includes Max Clara, who was accused of plagiarism and, at least implicitly, of basing his career on Nazi party support...
October 20, 2016: Annals of Anatomy, Anatomischer Anzeiger: Official Organ of the Anatomische Gesellschaft
Sanjiv Sharma, Zhenyi Huang, Michelle Rogers, Martyn Boutelle, Anthony E G Cass
We describe here a minimally invasive glucose biosensor based on a microneedle array electrode fabricated from an epoxy-based negative photoresist (SU8 50) and designed for continuous measurement in the dermal compartment with minimal pain. These minimally invasive, continuous monitoring sensor devices (MICoMS) were produced by casting the structures in SU8 50, crosslinking and then metallising them with platinum or silver to obtain the working and reference electrodes, respectively. The metallised microneedle array electrodes were subsequently functionalised by entrapping glucose oxidase in electropolymerised polyphenol (PP) film...
November 2016: Analytical and Bioanalytical Chemistry
Sacha Noimark, Enrico Salvadori, Rafael Gómez-Bombarelli, Alexander J MacRobert, Ivan P Parkin, Christopher W M Kay
Surfaces with built-in antimicrobial activity have the potential to reduce hospital-acquired infections. One promising strategy is to create functionalised surfaces which, following illumination with visible light, are able to generate singlet oxygen under aerobic conditions. In contrast to antibiotics, the mechanism of bacterial kill by species derived from reactions with singlet oxygen is completely unselective, therefore offering little room for evolutionary adaptation. Here we consider five commercially available organic photosensitiser dyes encapsulated in silicone polymer that show varied antimicrobial activity...
October 12, 2016: Physical Chemistry Chemical Physics: PCCP
Sally Elizabeth Hall, Brett Nixon, R John Aitken
Feral horses are a significant pest species in many parts of the world, contributing to land erosion, weed dispersal and the loss of native flora and fauna. There is an urgent need to modify feral horse management strategies to achieve public acceptance and long-term population control. One way to achieve this is by using non-surgical methods of sterilisation, which are suitable in the context of this mobile and long-lived species. In this review we consider the benefits of implementing novel mechanisms designed to elicit a state of permanent sterility (including redox cycling to generate oxidative stress in the gonad, random peptide phage display to target non-renewable germ cells and the generation of autoantibodies against proteins essential for conception via covalent modification) compared with that of traditional immunocontraceptive approaches...
October 5, 2016: Reproduction, Fertility, and Development
F C Fraser, R Corstanje, L K Deeks, J A Harris, M Pawlett, L C Todman, A P Whitmore, K Ritz
When dry soils are rewetted a pulse of CO2 is invariably released, and whilst this phenomenon has been studied for decades, the precise origins of this CO2 remain obscure. We postulate that it could be of chemical (i.e. via abiotic pathways), biochemical (via free enzymes) or biological (via intact cells) origin. To elucidate the relative contributions of the pathways, dry soils were either sterilised (double autoclaving) or treated with solutions of inhibitors (15% trichloroacetic acid or 1% silver nitrate) targeting the different modes...
October 2016: Soil Biology & Biochemistry
Yunwei Xu, Zhihong Huang, George Corner
Corrosion of surgical instruments provides a seat for contamination and prevents proper sterilisation, placing both patients and medical staff at risk of infection. Corrosion can also compromise the structural integrity of instruments and lead to mechanical failure in use. It is essential to understand the various factors affecting corrosion resistance of surgical instruments and how it can be minimised.This paper investigates the effect on corrosion resistance from the clinical washing decontamination (WD) process, specifically by studying the changes in surface roughness and Cr/Fe ratio...
September 28, 2016: Bio-medical Materials and Engineering
Stefano Cattaneo, Milda Stuknytė, Fabio Masotti, Ivano De Noni
Protein modifications occurring during sterilisation of infant formulas can affect protein digestibility and release of bioactive peptides. The effect of glycation and cross-linking on protein breakdown and release of β-casomorphins was evaluated during in vitro gastro-intestinal digestion (GID) of six sterilised model systems of infant formula. Protein degradation during in vitro GID was evaluated by SDS-PAGE and by measuring the nitrogen content of ultrafiltration (3kDa) permeates before and after in vitro GID of model IFs...
February 15, 2017: Food Chemistry
P Bhaskar, L A Bosworth, R Wong, M A O'Brien, H Kriel, E Smit, D A McGrouther, J K Wong, S H Cartmell
The functional replacement of tendon represents an unmet clinical need in situations of tendon rupture, tendon grafting and complex tendon reconstruction, as usually there is a finite source of healthy tendon to use as donors. The micro fibrous architecture of tendon is critical to the function of tendon. This study investigates the use of electrospun poly(ε-caprolactone) (PCL) scaffolds as potential biomaterial substitutes for tendon grafts. We assessed the performance of two electrospinning manufacturers (small and large-scale) and the effect of two sterilisation techniques - gamma irradiation and ethanol submersion - on cell response to these electrospun scaffolds following their implantation into a murine tendon model...
September 20, 2016: Journal of Biomedical Materials Research. Part A
Jahrad Haq, Sarah Siddiqui, Mark McGurk
Ameloblastoma is a rare, benign, odontogenic tumour that affects the mandible more commonly than the maxilla. Solid or multicytic variants are often resected and the defects reconstructed with a free flap. To establish the outcome after enucleation and application of Carnoy's solution, irrespective of histological subtype, we used the hospital's histology database to identify all the patients treated between 2001 and 2014 by one surgeon. Variables included patients' characteristics, histological subtype, radiological appearance, follow-up period, and incidence of recurrence...
September 3, 2016: British Journal of Oral & Maxillofacial Surgery
Elita Montanari, Chiara Di Meo, Simona Sennato, Antonio Francioso, Anna Laura Marinelli, Francesca Ranzo, Serena Schippa, Tommasina Coviello, Federico Bordi, Pietro Matricardi
Although in recent years several methods have been studied and developed to obtain different types of nanosized drug delivery systems, the set up of suitable procedures and materials remains highly expensive, their preparation is time consuming and often not feasible for a scale-up process. Furthermore, the sterilisation and storage of nanocarrier formulations represents a complicated but mandatory step for their effective use. In our previous work we assessed the use of an autoclaving process to achieve, in one simple step, sterile self-assembled hyaluronan-cholesterol (HA-CH) and hyaluronan-riboflavin (HA-Rfv) nanohydrogels (NHs)...
August 26, 2016: New Biotechnology
Jessica C Roediger, Alexander C Outhred, Bruce Shadbolt, Philip N Britton
AIM: We aimed to describe the clinical epidemiology of Staphylococcus aureus bacteraemia (SAB) at a large, tertiary/quaternary children's hospital in Australia. METHODS: We performed a retrospective chart review of SAB cases at the Children's Hospital at Westmead (CHW) over 5 years; 2006-2011. We compared frequency, clinical profile and outcomes of SAB with published data from CHW; 1994-1998. We compared health-care associated with community-associated (HCA-SAB and CA-SAB; defined epidemiologically) and methicillin-resistant with methicillin susceptible S...
August 27, 2016: Journal of Paediatrics and Child Health
Shakeel Ahmed, Saiqa Ikram
Biopolymers are polymers obtained from biological origins and used for various biological and industrial applications. A biopolymer should be non-toxic, non-antigenic, non-irritant, non-carcinogenic, sterilisable and adequately available for their widespread applications. In this study, chitosan (CS) and gelatin (GL) based films were prepared to be used as biodegradable packaging films. CS was blended with GL to improve various physicochemical properties. The blended CSGL films were crosslinked with boric acid (BA) to improve various properties viz...
October 2016: Journal of Photochemistry and Photobiology. B, Biology
Javier Pizones, Felisa Sánchez-Mariscal, Lorenzo Zúñiga, Enrique Izquierdo
INTRODUCTION: During thoracic curve correction, the tightening of the sublaminar wires through concavity creates a medial and a dorsal translation of the spine. However, little is known about the effect of the sublaminar wires on the axial plane. METHODS: This is prospective case series analysis of 30 consecutive surgical patients with main thoracic adolescent idiopathic scoliosis. All of the patients were fused with hybrid instrumentation (apical concavity-sublaminar wires) and differential rod contouring (over-kyphosis concavity/under-kyphosis convexity)...
October 2016: European Journal of Orthopaedic Surgery & Traumatology: Orthopédie Traumatologie
Elke Gossla, Robert Tonndorf, Anne Bernhardt, Martin Kirsten, Rolf-Dieter Hund, Dilibar Aibibu, Chokri Cherif, Michael Gelinsky
UNLABELLED: Electrostatic flocking - a common textile technology which has been applied in industry for decades - is based on the deposition of short polymer fibres in a parallel aligned fashion on flat or curved substrates, covered with a layer of a suitable adhesive. Due to their highly anisotropic properties the resulting velvet-like structures can be utilised as scaffolds for tissue engineering applications in which the space between the fibres can be defined as pores. In the present study we have developed a fully resorbable compression elastic flock scaffold from a single material system based on chitosan...
October 15, 2016: Acta Biomaterialia
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