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1.
J Environ Manage ; 278(Pt 2): 111545, 2021 Jan 15.
Article En | MEDLINE | ID: mdl-33202370

Marine spatial planning (MSP) has rapidly become the most widely used integrated, place-based management approach in the marine environment. Monitoring and evaluation of MSP is key to inform best practices, adaptive management and plan iteration. While standardised evaluation frameworks cannot be readily applied, accounting for evaluation essentials such as the definition of evaluation objectives, indicators and stakeholder engagement of stakeholders is a prerequisite for meaningful evaluation outcomes. By way of a literature review and eleven practical MSP case studies, we analysed present day trends in evaluation approaches and unravelled the adoption of evaluation essentials for three categories for monitoring and evaluation for plan making, plan outcomes, and policy implementation. We found that at a global scale the focus of MSP evaluation has shifted over the past decade from evaluating predominantly plan outcomes towards the evaluation of plan making. Independent of the scope of the evaluation, evaluation approaches varied greatly from formal and structured processes, building for instance on MSP goals and objectives, to informal processes based on stakeholder interviews. We noted a trend in the adoption of formalised approaches where MSP evaluations have increasingly become linked to MSP policy goals and objectives. However, the enhanced use of MSP objectives and indicators did not result in a more straightforward reporting of outcomes, e.g. such as the achievement of specific MSP objectives. Overall, we found weak linkages between defined MSP objectives, indicators and available monitoring data. While the apparent shift towards a focus on objectives is promising, we highlight the need of fit-for-purpose monitoring data to enable effective evaluation of those objectives. Hence, effective MSP and adaptive management processes require customised and concurrent monitoring and evaluation strategies and procedures. We argue that evaluation processes would also benefit from a better understanding of the general environmental, socio-economic and socio-cultural effects of MSP. Therefore, to understand better environmental effects of MSP, we praise that forthcoming MSP processes need to deepen the understanding and considerations of cause-effect pathways between human activities and changes of ecosystem state through the adoption of targeted cumulative effects assessments.


Conservation of Natural Resources , Ecosystem , Human Activities , Humans
2.
Bone Joint Res ; 8(6): 266-274, 2019 Jun.
Article En | MEDLINE | ID: mdl-31346455

OBJECTIVES: Bioresorbable orthopaedic devices with calcium phosphate (CaP) fillers are commercially available on the assumption that increased calcium (Ca) locally drives new bone formation, but the clinical benefits are unknown. Electron beam (EB) irradiation of polymer devices has been shown to enhance the release of Ca. The aims of this study were to: 1) establish the biological safety of EB surface-modified bioresorbable devices; 2) test the release kinetics of CaP from a polymer device; and 3) establish any subsequent beneficial effects on bone repair in vivo. METHODS: ActivaScrew Interference (Bioretec Ltd, Tampere, Finland) and poly(L-lactide-co-glycolide) (PLGA) orthopaedic screws containing 10 wt% ß-tricalcium phosphate (ß-TCP) underwent EB treatment. In vitro degradation over 36 weeks was investigated by recording mass loss, pH change, and Ca release. Implant performance was investigated in vivo over 36 weeks using a lapine femoral condyle model. Bone growth and osteoclast activity were assessed by histology and enzyme histochemistry. RESULTS: Calcium release doubled in the EB-treated group before returning to a level seen in untreated samples at 28 weeks. Extensive bone growth was observed around the perimeter of all implant types, along with limited osteoclastic activity. No statistically significant differences between comparative groups was identified. CONCLUSION: The higher than normal dose of EB used for surface modification did not adversely affect tissue response around implants in vivo. Surprisingly, incorporation of ß-TCP and the subsequent accelerated release of Ca had no significant effect on in vivo implant performance, calling into question the clinical evidence base for these commercially available devices.Cite this article: I. Palmer, S. A. Clarke, F. J Buchanan. Enhanced release of calcium phosphate additives from bioresorbable orthopaedic devices using irradiation technology is non-beneficial in a rabbit model: An animal study. Bone Joint Res 2019;8:266-274. DOI: 10.1302/2046-3758.86.BJR-2018-0224.R2.

4.
J Mater Sci Mater Med ; 29(3): 30, 2018 03 09.
Article En | MEDLINE | ID: mdl-29523976

The original version of this article unfortunately contained a mistake. E. Themistou was missing from the author group and so is now included with this erratum.

5.
Clin Endocrinol (Oxf) ; 88(6): 920-927, 2018 06.
Article En | MEDLINE | ID: mdl-29446481

OBJECTIVE: Ovarian hyperstimulation syndrome (OHSS) is a serious iatrogenic condition, predominantly related to the hormone used to induce oocyte maturation during IVF treatment. Kisspeptin is a hypothalamic neuropeptide that has recently been demonstrated to safely trigger final oocyte maturation during IVF treatment even in women at high risk of OHSS. However, to date, the safety of kisspeptin has not been compared to current hormonal triggers of oocyte maturation. DESIGN: We conducted a retrospective single-centre cohort study investigating symptoms and clinical parameters of early OHSS in women at high risk of OHSS (antral follicle count or total number of follicles on day of trigger ≥23) triggered with human chorionic gonadotrophin (hCG) (n = 40), GnRH agonist (GnRHa; n = 99) or kisspeptin (n = 122) at Hammersmith Hospital IVF unit, London, UK (2013-2016). RESULTS: Clinical Parameters of OHSS: Median ovarian volume was larger following hCG (138 ml) than GnRHa (73 ml; P < .0001), and in turn kisspeptin (44 ml; P < .0001). Median ovarian volume remained enlarged 20-fold following hCG, 8-fold following GnRHa and 5-fold following kisspeptin compared to prestimulation ovarian volumes. Mean (±SD) ascitic volumes were lesser following GnRHa (9 ± 44 ml) and kisspeptin (5 ± 8 ml) than hCG (62 ± 84 ml; P < .0001). Symptoms of OHSS were most frequent following hCG and least frequent following kisspeptin. Diagnosis of OHSS: The odds ratio for OHSS diagnosis was 33.6 (CI 12.6-89.5) following hCG and 3.6 (CI 1.8-7.1) following GnRHa, when compared to kisspeptin. CONCLUSION: Triggering oocyte maturation by inducing endogenous gonadotrophin release is preferable to the use of exogenous hCG in women at high risk of OHSS.


Fertilization in Vitro/adverse effects , Oocytes/cytology , Ovarian Hyperstimulation Syndrome/pathology , Adult , Chorionic Gonadotropin/pharmacology , Cohort Studies , Female , Humans , Kisspeptins/pharmacology , Ovarian Hyperstimulation Syndrome/etiology , Ovulation Induction/adverse effects , Retrospective Studies , Young Adult
6.
J Mater Sci Mater Med ; 29(1): 14, 2017 12 28.
Article En | MEDLINE | ID: mdl-29285611

Process-induced degradation of clinically relevant resorbable polymers was investigated for two thermal techniques, filament extrusion followed by fused deposition modelling (FDM). The aim was to develop a clear understanding of the relationship between temperature, processing time and resultant process-induced degradation. This acts to address the current knowledge gap in studies involving thermal processing of resorbable polymers. Poly(DL-lactide-co-glycolide) (PDLGA) was chosen for its clinically relevant resorption properties. Furthermore, a comparative study of controlled thermal exposure was conducted through compression moulding PDLGA at a selected range of temperatures (150-225 °C) and times (0.5-20 min). Differential scanning calorimetry (DSC) and gel permeation chromatography (GPC) were used to characterise thermally induced degradation behaviour. DSC proved insensitive to degradation effects, whereas GPC demonstrated distinct reductions in molecular weight allowing for the quantification of degradation. A near-exponential pattern of degradation was identified. Through the application of statistical chain scission equations, a predictive plot of theoretical degradation was created. Thermal degradation was found to have a significant effect on the molecular weight with a reduction of up to 96% experienced in the controlled processing study. The proposed empirical model may assist prediction of changes in molecular weight, however, accuracy limitations are highlighted for twin-screw extrusion, accredited to high-shear mixing. The results from this study highlight the process sensitivity of PDLGA and proposes a methodology for quantification and prediction, which contributes to efforts in understanding the influence of manufacture on performance of degradable medical implants.


Biocompatible Materials/chemistry , Lactic Acid/chemistry , Polyesters/chemistry , Polyglactin 910/chemistry , Polyglycolic Acid/chemistry , Tissue Scaffolds , Absorbable Implants , Bone and Bones , Calorimetry, Differential Scanning , Chromatography, Gel , Drug Carriers , Hot Temperature , Molecular Weight , Reproducibility of Results
7.
J Mater Sci Mater Med ; 27(2): 22, 2016 Feb.
Article En | MEDLINE | ID: mdl-26704539

Bone tissue engineering may provide an alternative to autograft, however scaffold optimisation is required to maximize bone ingrowth. In designing scaffolds, pore architecture is important and there is evidence that cells prefer a degree of non-uniformity. The aim of this study was to compare scaffolds derived from a natural porous marine sponge (Spongia agaricina) with unique architecture to those derived from a synthetic polyurethane foam. Hydroxyapatite scaffolds of 1 cm(3) were prepared via ceramic infiltration of a marine sponge and a polyurethane (PU) foam. Human foetal osteoblasts (hFOB) were seeded at 1 × 10(5) cells/scaffold for up to 14 days. Cytotoxicity, cell number, morphology and differentiation were investigated. PU-derived scaffolds had 84-91% porosity and 99.99% pore interconnectivity. In comparison marine sponge-derived scaffolds had 56-61% porosity and 99.9% pore interconnectivity. hFOB studies showed that a greater number of cells were found on marine sponge-derived scaffolds at than on the PU scaffold but there was no significant difference in cell differentiation. X-ray diffraction and inductively coupled plasma mass spectrometry showed that Si ions were released from the marine-derived scaffold. In summary, three dimensional porous constructs have been manufactured that support cell attachment, proliferation and differentiation but significantly more cells were seen on marine-derived scaffolds. This could be due both to the chemistry and pore architecture of the scaffolds with an additional biological stimulus from presence of Si ions. Further in vivo tests in orthotopic models are required but this marine-derived scaffold shows promise for applications in bone tissue engineering.


Biomimetic Materials/chemistry , Cell Differentiation , Durapatite/chemistry , Osteoblasts/physiology , Porifera/chemistry , Tissue Scaffolds/chemistry , Animals , Biocompatible Materials/chemistry , Cells, Cultured , Guinea Pigs , Humans , Materials Testing , Osteoblasts/cytology , Osteogenesis/physiology , Tissue Engineering/instrumentation , Tissue Engineering/methods
8.
Child Care Health Dev ; 40(4): 492-7, 2014 Jul.
Article En | MEDLINE | ID: mdl-23662595

BACKGROUND: We examined the feasibility of self-directed Triple P 'Positive Parenting Programme' for optimizing parents' management of childhood asthma and behaviour. METHODS: Eligible families were invited to access asthma-specific web-based Triple P as part of a preliminary randomized controlled study. RESULTS: Initial study information and introductory website pages received considerable interest but intervention uptake was poor with high rates of attrition. CONCLUSIONS: Although parents of children with asthma show willingness to access web-based parenting support, further work is necessary to develop engaging websites and determine barriers to uptake, and adherence to online parenting interventions with this population.


Asthma/psychology , Information Dissemination/methods , Internet , Parenting , Parents/education , Patient Acceptance of Health Care/statistics & numerical data , Patient Compliance/statistics & numerical data , Adult , Asthma/epidemiology , Asthma/therapy , Child , Child, Preschool , Evidence-Based Medicine , Female , Health Knowledge, Attitudes, Practice , Humans , Male , Outcome Assessment, Health Care , Parenting/psychology , Parents/psychology , Program Evaluation , Surveys and Questionnaires , United Kingdom/epidemiology
10.
Neuromuscul Disord ; 23(4): 289-97, 2013 Apr.
Article En | MEDLINE | ID: mdl-23465657

Gastrostomy, gastrojejunostomy and anti-reflux surgery in infants and children who are chronically ventilator dependent are associated with significant risk of morbidity and mortality. We report outcomes of 22 high risk children who underwent these procedures at our centre. Pre-operative investigations included: overnight oxygen and carbon dioxide monitoring and subsequent optimisation of ventilatory support, echocardiography, video fluoroscopy, and assessment of gastroesophageal reflux. We carried out 24 procedures under general anaesthesia. Twenty-one children used ventilatory support pre-operatively. Median age of first surgical procedure was 18 months (range 3-180). Supplementary feeding was commenced in 20 children prior to procedure, median age 9 months (1-31). Median PICU length of stay was 1 (1-8) days. No children died in the post-operative period. Extubation was possible within 24h in 87% of cases. Complications included; atelectasis (n=2), ileus (n=2), abdominal distension (n=4) and loose stools (n=1). We conclude that, in this high risk cohort of ventilator dependent children with predominantly neuromuscular disorders, with careful assessment, operative intervention can be carried out under general anaesthesia, with the child being extubated early back onto their routine ventilatory support and aggressive airway clearance. Additionally this protocol can minimise post-operative complications and is associated with a good outcome in the majority.


Failure to Thrive/surgery , Gastroesophageal Reflux/surgery , Gastrostomy/methods , Jejunostomy/methods , Nervous System Diseases/complications , Postoperative Complications/prevention & control , Respiration, Artificial/methods , Adolescent , Child , Child, Preschool , Clinical Protocols , Down Syndrome/complications , Enteral Nutrition/instrumentation , Enteral Nutrition/methods , Failure to Thrive/etiology , Gastroesophageal Reflux/complications , Humans , Infant , Lung Diseases/complications , Neuromuscular Diseases/complications , Noninvasive Ventilation/methods , Postoperative Care/methods , Preoperative Care/methods , Retrospective Studies , Treatment Outcome
11.
Scott Med J ; 57(2): 65-8, 2012 May.
Article En | MEDLINE | ID: mdl-22555224

The views of the parents of children undergoing elective surgery are not well represented in the literature. The aim of this study was to identify the priorities of parents with a view to improve their satisfaction. A questionnaire-based survey was conducted among parents of children undergoing elective surgery between November 2007 and March 2008. A total of 337 completed questionnaires were received. A similar survey was conducted among 12 surgeons, and their views were compared. Forty-three percent of parents preferred to know about a procedure on the day of surgery while others wanted the information in advance. Parents were most concerned with the complications of surgery and least concerned with the scar. Most of the surgeons thought it was not essential to mention their level of experience and the detailed surgical procedure to the parents while obtaining consent for surgery. In contrast, the parents thought that knowing the experience of the operating surgeon and the detailed surgical procedure was more important than knowing the duration of operation and the surgical incision. Face-to-face discussion with a surgeon was the most preferred mode of communication. Although 82% of parents have access to the Internet, booklets were more popular among parents than online information. Twelve percent of parents wanted the information in a foreign language. This survey reveals the perspective of parents about their child's surgery and identifies the differences in opinion between patients and surgeons about the information to be provided before surgery. Tailoring information to the parents' priorities will improve parent satisfaction.


Elective Surgical Procedures/psychology , Parents/psychology , Child , Child, Preschool , Communication , Decision Making , Female , Health Care Surveys , Humans , Infant , Pediatrics , Professional-Family Relations , Surveys and Questionnaires
12.
Biotechnol Adv ; 29(6): 610-7, 2011.
Article En | MEDLINE | ID: mdl-21527337

Current strategies for bone repair have accepted limitations and the search for synthetic graft materials or for scaffolds that will support ex vivo bone tissue engineering continues. Biomimetic strategies have led to the investigation of naturally occurring porous structures as templates for bone growth. The marine environment is rich in mineralizing organisms with porous structures, some of which are currently being used as bone graft materials and others that are in early stages of development. This review describes the current evidence available for these organisms, considers the relative promise of each and suggests potential future directions.


Aquatic Organisms , Bone Substitutes , Tissue Engineering , Tissue Scaffolds , Animals , Calcium Phosphates
13.
Child Care Health Dev ; 37(4): 571-80, 2011 Jul.
Article En | MEDLINE | ID: mdl-21143268

BACKGROUND: Haemopoietic stem cell transplantation (HSCT) is a life-saving but intensive procedure associated with potentially severe adverse late effects. We aimed to determine morbidity and health-related quality of life (HRQOL) in a sample of survivors aged 8-18 years at least 1 year post HSCT for paediatric acute leukaemia, compared with a non-transplanted group of survivors matched for age, gender, initial disease and time since treatment. METHODS: Families (N = 54; HSCT n= 29) recruited from four UK centres completed measures of child behaviour and school attendance, HRQOL and finances. Mothers completed measures of their own well-being. Clinical outcome data were extracted from medical records. RESULTS: Children in the HSCT group had significantly more late effects and had received more tests for vision, bone, dental and skin health, and thyroid, lung, and gonadal function than the non-transplanted group. HRQOL scores for the HSCT group were significantly lower in all domains compared with the non-transplanted group and population norms, but were not significantly related to clinical indices. Mothers in the HSCT group had significantly poorer mental well-being than population norms. CONCLUSION: Significant morbidity and compromised HRQOL was found in survivors of HSCT. The burden of caring for a child after HSCT has a continuing toll on mothers' well-being.The importance of counselling families about possible long-term consequences is emphasized.


Hematopoietic Stem Cell Transplantation , Leukemia/surgery , Quality of Life , Adolescent , Case-Control Studies , Child , Female , Health Status , Humans , Leukemia/epidemiology , Male , Morbidity , Mothers/psychology , Risk Factors , Survivors , Time Factors , United Kingdom/epidemiology
14.
Br J Dermatol ; 163(3): 481-6, 2010 Sep.
Article En | MEDLINE | ID: mdl-20426784

BACKGROUND: Vitiligo is a visible condition that is more noticeable in darker-skinned people. Beliefs about illness have been linked to psychosocial adjustment. There is some evidence that such beliefs may be influenced by cultural factors. Surprisingly little is known about beliefs in relation to vitiligo. OBJECTIVES: The study sought to explore in depth the ways in which British Asian women manage and adjust psychosocially to vitiligo, and the potential role of ethnicity and culture in this process. METHODS: In-depth semistructured interviews were conducted with seven British women of South Asian decent and analysed using the qualitative method of template analysis. RESULTS: Participants described feeling visibly different and all had experienced stigmatization to some extent. Avoidance and concealment were commonplace. Experiences of stigmatization were often perceived to be associated with cultural values related to appearance, status, and myths linked to the cause of the condition. CONCLUSIONS: The findings of this study present a unique in-depth analysis of British South Asians living with vitiligo and suggest there is a need for further research to explore cultural associations of disfigurement and of adjustment to chronic skin conditions. Furthermore, they suggest that in addition to individual therapeutic interventions there may be a need for community interventions aimed at dispelling myths and raising awareness of sources of support and treatment.


Asian People/ethnology , Stereotyping , Vitiligo/psychology , Adaptation, Psychological , Adult , Asian People/psychology , Attitude to Health/ethnology , Chronic Disease , Culture , Female , Humans , Middle Aged , Qualitative Research , Self Concept , Social Support , United Kingdom , Vitiligo/ethnology , Young Adult
15.
Child Care Health Dev ; 36(1): 118-22, 2010 Jan.
Article En | MEDLINE | ID: mdl-19961496

BACKGROUND: Thalassaemia Major (TM) is a serious condition characterized by life-long dependence on blood transfusions and chelation therapy. Our aim was to determine health-related quality of life (HRQOL) in children with TM living in the UK, and the impact of caring for a child receiving National Health Service treatment on family finances. METHODS: This was a cross-sectional assessment of HRQOL in children (n= 22) with TM aged 8-18 years. Children were recruited from three UK Paediatric Haematology and Bone Marrow Transplant centres. Mothers completed measures of their child's HRQOL [PedsQL 4.0 (Measurement Model for the Pediatric Quality of Life Inventory, James W. Varni PhD, PedMetrics, Quantifying the Qualitative SM, Copyright 1998-2009)] and behaviour (Strengths and Difficulties questionnaire), and the impact of caring for the child on family finances. RESULTS: Child behaviour was within the normal range but child HRQOL was significantly lower than population norms. Family financial concerns associated with TM were associated with poorer child HRQOL (P= 0.020). CONCLUSIONS: Thalassaemia Major poses a considerable challenge to child HRQOL, well documented in areas of the world where TM is prevalent. Despite the availability of National Health Service care and financial benefits our study suggests a similar burden in the UK.


Cost of Illness , Health Status , Quality of Life , beta-Thalassemia/economics , beta-Thalassemia/psychology , Adolescent , Adult , Child , Family , Female , Humans , Male , Middle Aged , Social Support , Surveys and Questionnaires , United Kingdom , beta-Thalassemia/therapy
16.
Ann R Coll Surg Engl ; 91(8): 693-6, 2009 Nov.
Article En | MEDLINE | ID: mdl-19785945

INTRODUCTION: Primary care trust (PCT) funding of a ritual circumcision service has recently been withdrawn from our unit, raising concerns that this may result in greater morbidity from community circumcision. The aims of this study were to document our circumcision practice before and after the withdrawal of PCT funding and to determine its effect on the morbidity from circumcision. In addition, we wanted to survey all paediatric surgical centres in the British Isles to ascertain how many still offer a ritual circumcision service. PATIENTS AND METHODS: We retrospectively reviewed our circumcision practice for 1 year prior to the removal of UK Government funding, and then performed a prospective audit of our practice for the 12 months following funding withdrawal. An e-mail survey was also performed of all paediatric surgical units to determine the ritual circumcision service provision throughout the British Isles. RESULTS: A total of 213 boys underwent circumcision during the 12 months prior to the withdrawal of funding, of which 106 cases (50%) were ritual circumcisions. After funding withdrawal, 99 boys underwent circumcision, of which 98 cases (99%) were for medical reasons. A similar number of boys were re-admitted after a hospital circumcision during the two review periods (5 versus 4 patients), whereas the number admitted following a community circumcision rose after funding withdrawal (6 versus 11 patients). Only a third of British paediatric surgical centres offer a ritual circumcision service, and a significant pro- portion of these were either providing the service without PCT funding, or were reconsidering their decision to continue. CONCLUSIONS: PCT funding withdrawal for ritual circumcision had an impact on our unit's procedural case volume. This represented a cost saving to the trust, despite a higher rate of admissions for postoperative complications. There is an inequality in healthcare provision throughout the British Isles for ritual circumcision, and we feel it is vital to offer support and training to medical and non-medical practitioners who are being asked to perform a greater number of circumcisions in the community.


Ceremonial Behavior , Circumcision, Male/economics , Postoperative Complications/epidemiology , State Medicine/economics , Adolescent , Child , Child, Preschool , Circumcision, Male/adverse effects , Circumcision, Male/standards , Humans , Infant , Male , Postoperative Complications/surgery , Prospective Studies , Reoperation , Retrospective Studies , United Kingdom
17.
Bone Marrow Transplant ; 42(2): 73-82, 2008 Jul.
Article En | MEDLINE | ID: mdl-18500369

We review evidence concerning health-related quality of life (HRQL) following paediatric haemopoietic stem cell transplant. The aims are to determine (1) HRQL compared with population norms; (2) changes in HRQL over time and (3) relations between pre-transplant variables (disease, individual and family resources) and survivor HRQL. Five databases were searched for articles published between January 1990 and February 2008. A total of 15 studies including 12 separate cohorts were identified. (1) HRQL was comparable with or better than population norms 6 months to 8 years post transplant. (2) HRQL was already compromised pre-transplant, further impaired immediately following conditioning, but improved 4-12 months post transplant. (3) Pre-transplant predictors of HRQL include family functioning and individual resources (for example, social skills). Identification of pre-transplant variables associated with long-term HRQL is invaluable to inform early psychological intervention and facilitate positive adjustment.


Hematopoietic Stem Cell Transplantation/psychology , Quality of Life , Child , Hematopoietic Stem Cell Transplantation/mortality , Humans , Survivors
18.
J Mater Sci Mater Med ; 18(12): 2283-90, 2007 Dec.
Article En | MEDLINE | ID: mdl-17562143

The Advanced JAX Bone Void Filler System (AJBVFS) is a novel bone graft material manufactured by Smith and Nephew Orthopaedics Ltd. and comprises beta tri-calcium phosphate granules with carboxymethylcellulose (CMC) gel as a handling agent. This study investigated the potential, in vitro, of the AJBVFS to function as a delivery system for cell therapy to enhance healing of bone defects. The attachment of rabbit bone marrow stromal cells (rbBMSCs), human BMSCs (hBMSCs) and human bone-derived cells (hBDCs) to JAX granules and the effect of CMC gel on cell proliferation and differentiation were investigated. There were slight species differences in the number and morphology of cells attached on the JAX granules with less rbBMSC attachment than human. All cells tolerated the presence of CMC gel and a reduction in cell number was only seen after longer exposure to higher gel concentrations. Low concentrations of CMC gel enhanced proliferation, alkaline phosphatase (ALP) expression and ALP activity in human cells but had no effect on rbBMSC. This study suggests that AJBVFS is an appropriate scaffold for the delivery of osteogenic cells and the addition of CMC gel as a handling agent promotes osteogenic proliferation and differentiation and is therefore likely to encourage bone healing.


Bone Marrow Cells/drug effects , Bone Substitutes/pharmacology , Calcium Phosphates/pharmacology , Carboxymethylcellulose Sodium/pharmacology , Cell- and Tissue-Based Therapy/methods , Stromal Cells/drug effects , Adult , Aged , Animals , Bone Marrow Cells/physiology , Bone Substitutes/chemistry , Calcium Phosphates/chemistry , Carboxymethylcellulose Sodium/chemistry , Cell Adhesion/drug effects , Cell Proliferation/drug effects , Cells, Cultured , Female , Gels/pharmacology , Humans , Male , Materials Testing , Middle Aged , Rabbits , Species Specificity , Stromal Cells/physiology , Tissue Scaffolds
19.
Rev Sci Instrum ; 78(1): 013101, 2007 Jan.
Article En | MEDLINE | ID: mdl-17503901

Obtaining velocity information from the interaction of a laser pulse on a metal layer provides insight into the rapid dynamics of material removal and plasma plume physics during ablation. A traditional approach involves using a velocity interferometer system for any reflector (VISAR) on a reflective metal surface. However, when the target is a thin metal layer, the cohesion of the surface is quickly lost resulting in a large spread of particle velocities that cannot be easily resolved by VISAR. This is due to material ejection"confusing" the VISAR measurement surface, effectively washing out the spatial fringe visibility in the VISAR interferometer. A new heterodyne-based optical velocimeter method is the photonic Doppler velocimeter (PDV). Because PDV tracks motion in a frequency encoded temporal electro-optical signal, velocity information is preserved and allows for multiple velocity components to be recorded simultaneously. The challenge lies in extracting PDV velocity information at short (nanosecond) laser ablation time scales with rapidly varying heterodyne beats by using electronic, optical, and analytical techniques to recover the velocity information from a fleeting signal. Here we show how we have been able to obtain velocity information on the nanosecond time scale and are able to compare it to hydrodynamic simulations. Also, we examine refinements to our PDV system by increasing the bandwidth, utilizing different probes, and sampling different analysis techniques.


Doppler Effect , Lasers , Metals/analysis , Spectrum Analysis
20.
Child Care Health Dev ; 33(2): 155-60, 2007 Mar.
Article En | MEDLINE | ID: mdl-17291319

BACKGROUND: Treatment of childhood cancer occurs over a 2- to 3-year period, with initial intense phases of chemotherapy followed by less severe treatment periods. From first diagnosis, families are encouraged by healthcare professionals (following government guidelines) to try to maintain a normal life. The aim of this paper is to contribute to our understanding of how 'normal' family life is compromised from the perspective of the families themselves during this period of extreme stress and concern for the health and well-being of their child. METHODS: This study was longitudinal and involved a cross section of 32 mothers of children recently diagnosed with acute lymphoblastic leukaemia (ALL) currently participating in the Medical Research Council ALL-97 randomized control trial. Mothers were interviewed at three time points (3-4 months post diagnosis, 15 and 27 months) using a semi-structured format with open-ended questions. A qualitative methodology was employed to analyse interview data using Thematic analysis. RESULTS: Mothers reported understanding the importance of achieving normal life, but described how this was difficult to realize. At first interview, mothers were optimistic that they could achieve the 'normal life' as advised by healthcare workers. At 12 and 24 months, although all mothers reported that life was not back to normal, there were differences in how they perceived this lack of normality. Whereas some families experienced frustration and disappointment, others had adjusted and managed to accept the new order. CONCLUSIONS: Families felt encouraged on diagnosis to be told that despite the severity of the disease and treatment regime, a normal life was possible and should be pursued. Our findings indicate that over time, more concrete information is needed to guide parents through the treatment process in order to help them achieve this.


Family Health , Life Style , Mothers/psychology , Precursor Cell Lymphoblastic Leukemia-Lymphoma/psychology , Adaptation, Psychological , Adolescent , Child , Child, Preschool , Cross-Sectional Studies , Family , Female , Humans , Longitudinal Studies , Male , Precursor Cell Lymphoblastic Leukemia-Lymphoma/therapy , Surveys and Questionnaires
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