789 results on '"Whittal, A"'
Search Results
752. Mitochondria-associated Endoplasmic Reticulum Membrane (MAM) Regulates Steroidogenic Activity via Steroidogenic Acute Regulatory Protein (StAR)-Voltage-dependent Anion Channel 2 (VDAC2) Interaction.
- Author
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Prasad, Manoj, Kaur, Jasmeet, Pawlak, Kevin J., Bose, Mahuya, Whittal, Randy M., and Bose, Himangshu S.
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MITOCHONDRIA , *ENDOPLASMIC reticulum , *ANIONS , *BLOOD cholesterol , *BLOOD lipids - Abstract
Steroid hormones are essential for carbohydrate metabolism, stress management, and reproduction and are synthesized from cholesterol in mitochondria of adrenal glands and gonads/ovaries. In acute stress or hormonal stimulation, steroidogenic acute regulatory protein (StAR) transports substrate cholesterol into the mitochondria for steroidogenesis by an unknown mechanism. Here, we report for the first time that StAR interacts with voltage-dependent anion channel 2 (VDAC2) at the mitochondria- associated endoplasmic reticulum membrane (MAM) prior to its translocation to the mitochondrial matrix. In the MAM, StAR interacts with mitochondrial proteins Tom22 and VDAC2. However, Tom22 knockdown by siRNA had no effect on pregnenolone synthesis. In the absence of VDAC2, StAR was expressed but not processed into the mitochondria as a mature 30-kDa protein. VDAC2 interacted with StAR via its C-terminal 20 amino acids and N-terminal amino acids 221-229, regulating the mitochondrial processing of StAR into the mature protein. In the absence of VDAC2, StAR could not enter the mitochondria or interact with MAM-associated proteins, and therefore steroidogenesis was inhibited. Furthermore, the N terminus was not essential for StAR activity, and the N-terminal deletion mutant continued to interact with VDAC2. The endoplasmic reticulum-targeting prolactin signal sequence did not affect StAR association with the MAM and thus its mitochondrial targeting. Therefore, VDAC2 controls StAR processing and activity, and MAM is thus a central location for initiating mitochondrial steroidogenesis. [ABSTRACT FROM AUTHOR]
- Published
- 2015
- Full Text
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753. tertiary Alcohol Formation Catalysed by a Rhamnulose-1-PhosphateAldolase : Dendroketose-1-Phosphate Synthesis
- Author
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Victor Laurent, Virgil Hélaine, Marielle Lemaire, Marcel Salanoubat, Véronique de Berardinis, Guérard-Hélaine, C., Guérard-Hélaine, Christine, John Whittal, Peter W Sutton, Institut de Chimie de Clermont-Ferrand (ICCF), SIGMA Clermont (SIGMA Clermont)-Institut de Chimie du CNRS (INC)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS), Génomique métabolique (UMR 8030), Genoscope - Centre national de séquençage [Evry] (GENOSCOPE), Université Paris-Saclay-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université d'Évry-Val-d'Essonne (UEVE)-Centre National de la Recherche Scientifique (CNRS), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Université d'Évry-Val-d'Essonne (UEVE)
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[CHIM] Chemical Sciences ,[CHIM]Chemical Sciences ,ComputingMilieux_MISCELLANEOUS - Abstract
International audience
- Published
- 2020
754. Human Rights and Land in Africa : Highlighting the Need for Democratic Land Governance
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Hull, Simon Antony and Whittal, Jennifer
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Social Science - Abstract
Human rights principles form the foundation for the move towards responsible land administration. They are embedded in such international treatises as the Sustainable Development Goals, New Urban Agenda, and Voluntary Guidelines on the Responsible Governance of Tenure, among others. These treatises provide the backdrop to the development of land policies and administration systems that seek to secure land tenure and land rights for all through adherence to human rights principles such as non-discrimination, equity and justice, gender responsiveness, transparency and accountability. Yet the human rights tradition is built on Western values and biases, and there is some contention as to the universal acceptance of this. In discussing land rights in Africa, assumptions about the universality of human rights should be weighed against such contentions if land reform programmes are to sustainably succeed. In this chapter, the arguments around human rights are presented in the context of African land reform, and a model of democratic land governance is proposed.
- Published
- 2020
755. Isolation and Characterization of Carnocyclin A, a Novel Circular Bacteriocin Produced by Camobacterium maltaromaticum UAL307.
- Author
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Martin-Visscher, Leah A., van Belkum, Marco J., Garneau-Tsodikova, Sylvie, Whittal, Randy M., Jing Zheng, McMullen, Lynn M., and Vederas, John C.
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BACTERIOCINS , *ANTIBACTERIAL agents , *LISTERIA , *ORGANISMS , *IONIZATION (Atomic physics) , *CHYMOTRYPSIN , *MASS spectrometry , *PEPTIDES , *GENETICS - Abstract
Carnobacterium maltaromaticum UAL307, isolated from fresh pork, exhibits potent activity against a number of gram-positive organisms, including numerous Listeria species. Three bacteriocins were isolated from culture supernatant, and using matrix-assisted laser desorption ionization-time of flight mass spectrometry and Edman sequencing, two of these bacteriocins were identified as piscicolin 126 and carnobacteriocin BM1, both of which have previously been described. The remaining bacteriocin, with a molecular mass of 5,862 Da, could not be sequenced by traditional methods, suggesting that the peptide was either cyclic or N-terminally blocked. This bacteriocin showed remarkable stability over a wide temperature and pH range and was unaffected by a variety of proteases. After digestion with trypsin and α-chymotrypsin, the peptide was de novo sequenced by tandem mass spectrometry and a linear sequence deduced, consisting of 60 amino acids. Based on this sequence, the molecular mass was predicted to be 5,880 Da, 18 units higher than the observed molecular mass, which suggested that the peptide has a cyclic structure. Identification of the genetic sequence revealed that this peptide is circular, formed by a covalent linkage between the N and C termini following cleavage of a 4-residue peptide leader sequence. The results of structural studies suggest that the peptide is highly structured in aqueous conditions. This bacteriocin, named carnocyclin A, is the first reported example of a circular bacteriocin produced by Carnobacterium spp. [ABSTRACT FROM AUTHOR]
- Published
- 2008
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756. Isolation, Structural Characterization, and Properties of Mattacin (Polymyxin M), a Cyclic Peptide Antibiotic Produced by Paenibacillus kobensis M.
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Martin, Nathaniel I., Haijing Hu, Moake, Matthew M., Churey, John J., Whittal, Randy, Worobo, Randy W., and Vederas, John C.
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POLYMYXIN , *CYCLIC peptides , *ANTIBIOTICS - Abstract
Discusses the isolation, structural characterization and properties of mattacin (polymyxin M), a cyclic peptide antibiotic produced by Paenibacillus kobensis M. Results of transfer NOE experiments on the conformational preferences of mattacin when bound to lipid A; Inhibition of the growth of a wide variety of Gram-positive and Gram-negative bacteria.
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- 2003
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757. A framework for guiding cadastral systems development in customary land rights contexts
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Hull, Simon, Whittal, Jennifer, and van Belle, Jean-Paul
- Abstract
Land reform in South Africa is reported to be failing, and land tenure reform in customary contexts is the least well-addressed component of land reform. To address this failure, a framework for guiding cadastral systems development in customary land rights contexts is developed. Using a research synthesis methodology, this conceptual framework is derived from existing literature. It comprises of five evaluation areas (underlying theory, land administration system context, change drivers, change process, and review process), each of which is broken down into related aspects and elements. The three interrelated goals of success, sustainability, and significance permeate the framework. It is suggested that cadastral systems development (and, by consequence, land tenure reform) projects operating in customary land rights contexts fail when they are not sensitive to the significance of development processes and outcomes for customary land rights-holders. The conceptual framework is tested and extended through a progressive case study of four examples of cadastral systems development in Germany, the Netherlands, Mozambique, and South Africa. The elements of the framework are compared against context-specific descriptors that emerge from the case studies to assess how well they have been addressed. Thus, each case brings contextual relevance to the framework, sequentially increasing its groundedness. The European cases are chosen because they are seen to be examples of ‘good practice’ for their contexts and because developments in southern Africa have drawn from and been influenced by them. Hence, they are expected to add relevant insight to the conceptual framework. The southern African cases are chosen because they reflect the intended context of application of the framework and have been undergoing cadastral systems development for the past few decades. The framework was found to be useful in highlighting strengths and weaknesses in all four cases. Weaknesses in the European cases related to their insensitivity towards human rights, class and gender issues possibly arising from assumptions about the uniformity of their socio-economic context. There was also inadequate attention given to the review processes. Strengths arose from the developed nature of the countries as reflected in their good governance and well-functioning cadastral systems. In the southern African cases, the primary weaknesses arose from the adoption of inappropriate theory of development, leading to a loss of significance of development process and outcomes. Other weaknesses are related to the lack of developing status of southern African countries, as reflected in their poor land governance and low levels of technological capacity. Strengths related to acknowledgement of human rights issues and the need to address historical injustices in the southern African cases. The resultant, grounded framework is intended to be used as a tool by policymakers and cadastral systems developers. By taking note of the framework’s aspects and elements, it is proposed that cadastral systems development in customary land rights contexts will carry significance for the land rights-holders, encouraging their adoption and embrace of the process and outcomes of development, which in turn fosters the success and sustainability of development.
- Published
- 2019
758. Quasifree knockout in [sup 9]Be([alpha],2[alpha])[sup 5]He at an incident energy of 197 MeV
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Whittal, D [National Accelerator Centre, Faure, 7131 (South Africa)]
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- 1994
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759. Asymmetries in 100 MeV [pi][sup +]/[pi][sup [minus]]-[sup 3][rvec H]e elastic scattering
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Whittal, D [Ohio University, Athens, Ohio 45701 (United States) Simon Fraser University, Burnaby, British Columbia, V5A 1S6 (Canada) TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, V6T 2A3 (Canada) Tel-Aviv University, Ramat Aviv, Israel 69978 (United States)]
- Published
- 1994
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760. Coincident proton emission induced by 200 MeV protons on [sup 197]Au
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Whittal, D [National Accelerator Centre, P.O. Box 72, Faure, 7131 (South Africa)]
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- 1993
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761. Integrating land administration systems in peri-urban customary areas in Ghana
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Obeng, Williams, Whittal, Jennifer, Mostert, Hanri, Department of Construction Economics and Management, and Faculty of Engineering and the Built Environment
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land administration systems ,peri-urban customary areas ,Ghana - Abstract
Dual land administration systems operate in many peri-urban customary areas in subSaharan Africa (Burns, 2007), yet the rationality behind them is different, and possibly conflicting (Watson, 2003). The conflicting rationalities between the dual systems have created binaries in land administration discourse. Some scholars have promoted statutory land administration systems over customary systems (Hardin, 1968). Many pre-21st century land administration systems theories were purely economy-based, and sought to discredit customary land administration and tenure systems (De Soto, 2000; Peters, 2009). The weaknesses of customary land administration and tenure systems have been widely articulated in economy-based land administration literature (Demsetz,1967). However, recent research findings seem to suggest that peri-urban customary land management could improve through hybrid land administration, incorporating both customary and statutory systems (Whittal, 2014). In this study, statutory and customary land administration systems are examined to understand how they can be integrated to improve effective land delivery at the peri-urban interface in Ghana. A case study analysis of hybrid forms of land administration was undertaken, using both primary and secondary data. Relatively successful case studies (from Ghana and other parts of sub-Saharan Africa) were deliberately chosen to learn good ways of managing peri-urban customary land. Land administration practices in such areas were assessed using the good land governance framework. The case study analysis reveals that hybrid land administration systems are appropriate in enhancing livelihood sustainability and tenure security of the local people. To this end, the study proposes some improvements in hybrid land administration practices to reduce conflicting rationalities between customary and statutory land administration systems.
- Published
- 2018
762. When it's at: An examination of when cognitive change occurs during cognitive therapy for compulsive checking in obsessive-compulsive disorder.
- Author
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Radomsky, Adam S., Wong, Shiu F., Giraldo-O'Meara, Martha, Dugas, Michel J., Gelfand, Laurie A., Myhr, Gail, Schell, Sarah E., Senn, Jessica M., Shafran, Roz, and Whittal, Maureen L.
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COGNITIVE therapy , *OBSESSIVE-compulsive disorder , *COMPULSIVE shopping , *MULTILEVEL models , *CONFIDENCE - Abstract
Background and Objectives: The cognitive theory of compulsive checking in OCD proposes that checking behaviour is maintained by maladaptive beliefs, including those related to inflated responsibility and those related to reduced memory confidence. This study examined whether and when specific interventions (as part of a new cognitive therapy for compulsive checking) addressing these cognitive targets changed feelings of responsibility and memory confidence.Methods: Participants were nine adults with a primary or secondary diagnosis of OCD who reported significant checking symptoms (at least one hour per day) on the Yale-Brown Obsessive-Compulsive Scale. A single-case multiple baseline design was used, after which participants received 12 sessions of cognitive therapy. From the start of the baseline period through to the 1 month post-treatment follow-up assessment session, participants completed daily monitoring of feelings of responsibility, memory confidence, and their time spent engaging in compulsive checking.Results: Results revealed that feelings of responsibility significantly reduced and memory confidence significantly increased from baseline to immediately post-treatment, with very high effect sizes. Multilevel modelling revealed significant linear changes in feelings of responsibility (i.e., reductions over time) and memory confidence (i.e., increases over time) occurred following the sessions when these were addressed. Finally, we found that improvements in these over the course of the treatment significantly predicted reduced time spent checking.Limitations: The small sample size limits our ability to generalize our results.Conclusions: Results are discussed in terms of a focus on the timing of change in cognitive therapy. [ABSTRACT FROM AUTHOR]- Published
- 2020
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763. Foreign direct investments in large-scale agriculture: the policy environment and its implications in Ethiopia
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Persson, Atkeyelsh G M, Whittal, Jennifer, and Ramutsindela, Maano
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Foreign Direct Investment ,sustainable investment - Abstract
In most African states, arable land and other natural resources play a pivotal role for economic growth and development. Ethiopia is one of those countries where agriculture is the backbone of the economy. Since the time of Emperor Haile Selassie I, Ethiopia has been attempting to advance the transformation of its agricultural sector by moving away from small-scale subsistence farming to large-scale commercial farming. It thus encouraged Foreign Direct Investment (FDI) in largescale agriculture. However, the military government that took power in 1974 reversed this. The current government of Ethiopia seized power from the military regime in 1991. Today the government once again advocates FDI in large-scale agriculture. This has led to an influx of foreign investors, especially in Gambella and Benshanguel-Gumuz Regional States. Various scholars, however, criticize the manner in which these investments have been taking place, arguing that the investments are neither pro-poor nor sustainable. Against this backdrop this research seeks to examine current policies, the patterns of investment they promote, and how these affect land-based resources and the wellbeing of communities. The study intends to provide information that may help improve the performance of FDI in terms of their sensitivity to poverty alleviation and sustainability. It also aims to boost current knowledge on FDI in agriculture in Ethiopia. The study was conducted using multiple data collection methods, including documentation, interviews, focus group discussions with the affected communities and direct observations in the case study areas. The results are analysed using pro-poor and sustainability frameworks for FDI in large-scale agriculture, along with findings of empirical studies on national FDI policies and practices in various parts of the globe. The analyses reveal that the Ethiopian investment policy's support to FDI in large-scale agriculture is inadequate. It focuses on giving incentives to attract FDI rather than ensuring the availability of quality institutions and sufficient infrastructure, which are vital for facilitating the operation and productivity of FDIs. Furthermore, the absence of community participation in the decision-making process for the agricultural investment projects in the case study areas portends significant negative implications for the wellbeing of local communities and the sustainability of the natural environment. The study recommends further research to investigate the economic viability of alternative land-based investments, such as eco-tourism, which is shown to be environmentally sustainable and can be shaped to be pro-poor. Also recommended is additional research into good practices for large-scale agricultural investments, that can be adapted to Ethiopian conditions, should the government opt to continue promoting FDI.
- Published
- 2016
764. Caution for the routine use of phenol red – It is more than just a pH indicator.
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Morgan, Andrew, Babu, Dinesh, Reiz, Béla, Whittal, Randy, Suh, Lindsey Y.K., and Siraki, Arno G.
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PHENOL , *ELECTRON paramagnetic resonance , *GLUTATHIONE , *OXIDATION-reduction reaction , *CELL metabolism , *PH standards , *PEROXIDASE , *ULTRAVIOLET spectrophotometry - Abstract
Phenol red (PR) is the standard pH indicator in various cell and tissue culture media, as it provides a quick check for the health of the culture. PR has also been used in multiple protocols to detect cellular hydrogen peroxide as well as peroxidase activity from human peroxidase enzymes. The majority of promyelocytic leukemia cell lines (e.g. HL-60 cells) express myeloperoxidase (MPO), which may react with PR, especially as the latter is present in cell culture media at sufficient concentrations (~15 μM) to partake in redox reactions. Moreover, phenolic molecules are often efficient donor substrates for peroxidase enzymes. In this study, we hypothesized that MPO metabolism of PR via MPO-expressing HL-60 cells could result in PR metabolite(s) that could modulate cell viability. We used purified human MPO for UV–visible spectrophotometry, electron paramagnetic resonance (EPR) and LC-MS analyses to investigate PR peroxidation. 2-chloro-5,5-dimethyl-1,3-cyclohexanedione (monochloro-dimedone, MCD) was used to assess the effect of PR on MPO-catalyzed chlorination activity, and we assessed PR uptake by HL-60 cells using LC-MS analysis. Lastly, we investigated the impact of PR metabolism by intracellular MPO on cell viability (ATP, using CellTiter-Glo®), cytotoxicity (using trypan blue), and on reduced and oxidized glutathione (using GSH/GSSG-Glo™). Our results demonstrate that PR undergoes oxidative halogenation via MPO, resulting in its UV–vis spectral changes due to the formation of mono- and di-halogenated products. Moreover, a significant increase in MPO-catalyzed chlorination of MCD and an increase in glutathionyl radical detection (using EPR) were observed in the presence of PR. Our in-vitro studies revealed that PR is readily taken up by HL-60 cells and its metabolism by intracellular MPO leads to a significant decrease in cellular glutathione as well as a significant increase in glutathione disulphide formation. In spite of the latter, PR had no considerable effect on HL-60 cell viability. These results provide evidence that while no overt decrease in cell viability may be observed, PR does impart redox activity, which investigators should be wary of in experimental protocols. • Phenol red is redox is halogenated by myeloperoxidase by Cl− and Br−. • Phenol red oxidation by myeloperoxidase oxidizes glutathione. • Phenol red can enhance myeloperoxidase halogenation activity. • Phenol red does not appear to cause overt cytotoxicity. • Phenol red is redox active and may interfere in biological assays. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
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765. Developing and initial testing of pro-poor prenuptial agreements as a new land tenure tool to secure rights in urban State-Subsidized Housing
- Author
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Downie, Leslie and Whittal, Jenny
- Subjects
InformationSystems_INFORMATIONSTORAGEANDRETRIEVAL ,ComputingMethodologies_DOCUMENTANDTEXTPROCESSING ,land tenure ,marital agreements ,GeneralLiterature_REFERENCE(e.g.,dictionaries,encyclopedias,glossaries) - Abstract
Includes bibliographic references., This research develops a pro-poor prenuptial agreement as an innovative land tenure tool to secure rights in urban subsidized housing. The model tested is confined to prenuptial agreements under the Marriage Act, but is relevant to other cohabitation or marital agreements that could be used to secure social tenure arising from intimate relationships. The model aims at securing the tenure of the entire household, in particular the more vulnerable members of the household. The research focuses on urban State -subsidized housing, with an emphasis on the Western Cape, South Africa. This housing is transferred to beneficiaries by registration of individual or co-ownership at the Deeds Registry, with the title deeds public documents. While prenuptial agreements are not usually regarded as a land tenure tool, the fact that they are also public documents registered at the Deeds Office makes them pertinent. A limited dataset of recent academic writing is analysed to identify the social context of household conflict and tenure insecurity, and existing legal template clauses assessed. The prenuptial template design is predicated on current tenure approaches that regard informal practices as equally relevant for the poor's tenure security as the formal law. The template uses various strategies to manage tenure insecurity arising from the death of an owner, disputes, or threatened eviction of dependents. It also aims to ensure that diverse normative beliefs are respected, particularly African normative systems. A personal servitude is used to secure housing tenure as a real right burdening the land, making this a very secure right. In addition the template includes a succession agreement and dispute resolution mechanisms. The template model is tested on clients simulated by re-storying the facts of two seminal Constitutional Court cases and a recent case study of another researcher. Focus groups are held with housing beneficiaries and interviews with housing officials, as a preliminary test of the private and public reception of such agreements. The need for legal aid is discussed. The research makes clear that cohabitation and marital agreements can be used to secure overlapping land rights that the ownership paradigm does not currently protect.
- Published
- 2015
766. Towards evaluating the map literacy of planners in 2D maps and 3D models in South Africa
- Author
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Rautenbach, Victoria, Coetzee, Serena, Cöltekin, Arzu, University of Zurich, Whittal, Jennifer, and Motala, Siddique
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10122 Institute of Geography ,910 Geography & travel - Published
- 2014
767. Municipal boundary demarcation in South Africa: processes and effects on governance in traditional rural areas
- Author
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Nxumalo, Cleotilda and Whittal, Jennifer
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Engineering ,InformationSystems_INFORMATIONSTORAGEANDRETRIEVAL ,ComputingMethodologies_DOCUMENTANDTEXTPROCESSING ,GeneralLiterature_REFERENCE(e.g.,dictionaries,encyclopedias,glossaries) - Abstract
Includes bibliographical references., This research adopts a case study approach to investigate disputes involving municipal boundaries in rural communities under traditional authority. Further, a multiple case study approach is used to expose in-depth understanding of these disputes. The causes of the disputes are investigated and the processes of municipal demarcation and boundary dispute resolution are analysed against a number of frameworks such as the goals of good governance in land administration, management paradigm, rights, restrictions and responsibilities, Kotter's eight stages of change management, and 7Es performance measurement frameworks. From this critique, conclusions are drawn about the municipal demarcation processes and improvements are recommended. The study finds that the frameworks and tools applied are suitable for the analysis and evaluation of the municipal boundary demarcation process. The main findings indicate that several municipal demarcations negatively affected service delivery and threatened the role of traditional leaders.
- Published
- 2013
768. The land administration system of Lesotho : challenges and opportunities
- Author
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Mabesa, Mamphaka Jeanett and Whittal, Jennifer
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InformationSystems_INFORMATIONSTORAGEANDRETRIEVAL ,ComputingMethodologies_DOCUMENTANDTEXTPROCESSING ,Architecture, Planning and Geomatics ,GeneralLiterature_REFERENCE(e.g.,dictionaries,encyclopedias,glossaries) - Abstract
Includes bibliographical references., The increasing need for effective land administration systems that help eradicate poverty, boost economic growth and lead countries to sustainable development, have led countries to engage in the reform of existing systems. In this process researchers and practitioners use appropriate methods, tools and frameworks to examine, analyse and evaluate existing systems prior to the design and implementation of new systems. The attempt to find suitable designs which are aligned with the best practices frameworks in land administration systems, has led to extensive research to develop, identify and test suitable methods and frameworks and to apply these to case studies. This research investigates and analyses the land administration system in Lesotho from a critical realist perspective.
- Published
- 2011
769. Molecular genetics of familial hypercholesterolemia in Israel – revisited.
- Author
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Ronen, Durst, Ibe, Uche Ken, Shoshi, Shpitzen, Daniel, Schurr, Marta, Futema, Ros, Whittal, Auryan, Szalat, Hilla, Knobler, Dov, Gavish, Yaakov, Henkin, Avishay, Ellis, Ardon, Rubinstein, Dror, Harats, Rafael, Bitzur, Bruno, Hershkovit, Steve E, Humphrie, Eran, Leitersdorf, and Meiner, Vardilla
- Subjects
- *
HYPERCHOLESTEREMIA , *MOLECULAR genetics , *GENETIC mutation , *LOW density lipoprotein receptors , *PROPROTEIN convertases - Published
- 2017
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770. Analysis of the impact of using GIS and 2.5D modelling in automating the determination of view factors for the purposes of CAMA modelling
- Author
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Kahonde, Justine and Whittal, Jenny
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Engineering - Abstract
Includes bibliographical references (leaves 83-86)., The main objective of this research is to investigate the impact of using GIS and 2.5D modelling in automating the process of determining view factors for CAMA modelling. Five metre contour data is used to generate digital terrain models (DTM) in the TIN data structure and in the raster data structure. The two terrain surfaces are assessed for accuracy by using the Town Survey Marks (TSM) height data.
- Published
- 2006
771. Analysis of the impact of location factors derived from different techniques on the predictive accuracy of CAMA models
- Author
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Musekiwa, Themba and Whittal, Jennifer
- Subjects
Architecture, Planning and Geomatics - Abstract
Includes bibliographical references (leaves 112-115).
- Published
- 2004
772. Groundwater management using a GIS case study : Uitenhage Subterranean Government Water Control Area
- Author
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Baron, Jane Helen, Whittal, Jennifer, and Butcher, Shirley
- Subjects
Architecture, Planning and Geomatics - Abstract
Bibliography: leaves 45-47., The area around Uitenhage in the Eastern Cape forms the centre of one of the biggest artesian groundwater basins in South Africa. The Table Mountain Group quartzitic sandstones are overlain by a thickness of postPalaeozoic sediments giving rise to artesian groundwater. The most wellknown of this manifestation are the springs at Uitenhage which have been used since pre-historic times and are currently a principal source of water for the municipal supply. At the turn of the 20th century, with the introduction of drilling machines into the area a number of boreholes were constructed. The resultant tapping into the artesian supply resulted in the spring-flow lessening and a decline in groundwater levels on introduction of further boreholes. At the request of the local community this special region was proclaimed a groundwater protection area. Over the years the abstraction within the area has risen and is currently at 3.24 million m³/a. However the licensed, legally abstractable, figure stands at 6.15 million m³/a. Groundwater levels have declined although the flow from the boreholes has not. Using GIS aU the available and pertinent information required for the management of the control area and for the estimation of the groundwater resource has been brought together. Using raster modelling techniques the amount of groundwater available within the system and the viability of sustained abstraction were assessed. A site-specific raster model has been designed to visualise and quantify the expected effects of new boreholes in the area.
- Published
- 2000
773. High precision GPS data processing for the survey of South African tide gauges
- Author
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Zimba, Robert, Merry, Charles, and Whittal, Jennifer
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Architecture, Planning and Geomatics - Abstract
Bibliography: leaves 72-78.
- Published
- 2000
774. Chemical Synthesis and Biological Activity of the Neopetrosiamides and Their Analogues: Revision of Disulfide Bond Connectivity.
- Author
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Hongqiang Liu, Boudreau, Marc A., Jing Zheng, Whittal, Randy M., Austin, Pamela, Roskelley, Calvin D., Roberge, Michel, Andersen, Raymond J., and Vederas, John C.
- Subjects
- *
BIOSYNTHESIS , *PEPTIDE synthesis , *OXIDATIVE stress , *CHEMICAL processes - Abstract
The article discusses the bioactivity and chemical synthesis of neopetrosiamides gathered in Papua New Guinea. It states that neopetrosiamides' synthesis demonstrated in disulfide bond connectivity requires reassignment, and that the synthesis of multiple-disulfide-containing peptides involves oxidative folding and disulfide bonds. It mentions that the disulfide connectivity was verified by replacing the protecting groups on the cysteine residues.
- Published
- 2010
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775. The social class of orthopedic rehabilitation patients: Are there differences in subjective health, return to work motivation, and participation in aftercare interventions?
- Author
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Rinn R, Whittal A, Kremeti E, and Lippke S
- Subjects
- Humans, Female, Male, Germany, Middle Aged, Adult, Prospective Studies, Longitudinal Studies, Aftercare methods, Aftercare statistics & numerical data, Motivation, Return to Work psychology, Return to Work statistics & numerical data, Social Class
- Abstract
This longitudinal quasi-experimental study examines the relationship between social class, subjective health, motivation to return to work (RTW) following medical rehabilitation, and participation in aftercare interventions, utilizing the Social Cognitive Theory of Social Class. To do so, a prospective multicentric study was conducted. The analysis was based on data from N = 1044 orthopedic rehabilitation patients in three clinics in Germany. Latent growth curve models, fixed-effect linear regression models, and multilevel binomial logistic regression were employed for data analysis. As hypothesized, the findings demonstrate that lower social class is associated with poorer subjective health, while higher social class is linked to increased solipsistic motives, characterized by pursuing personal goals in the context of RTW. Conversely, individuals from lower social classes exhibit contextualist motives, which indicate a focus on social and environmental threats influencing their motivation to RTW. Surprisingly, social class does not significantly impact participation in aftercare interventions, probably due to low variance and potentially the successful inclusion within the German healthcare system. These findings emphasize the importance of considering diverse motivation profiles derived from the Social Cognitive Theory of Social Class. The study contributes to our understanding of the social determinants of health and has implications for reducing health disparities by highlighting the motivational aspects, including solipsistic and contextualist motives, associated with social class., Competing Interests: Declaration of competing interest The authors would like to thank the Deutsche Rentenversicherung Oldenburg-Bremen for funding the study contained in this research (EXPERTIS Study)., (Copyright © 2024 The Authors. Published by Elsevier Ltd.. All rights reserved.)
- Published
- 2024
- Full Text
- View/download PDF
776. Determining Contextual Factors for a Heart Failure Self-Care Intervention: A Consensus Delphi Study (ACHIEVE).
- Author
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Whittal A, Ehringfeld I, Steinhoff P, and Herber OR
- Subjects
- Humans, Consensus, Delphi Technique, Delivery of Health Care, Self Care, Heart Failure therapy
- Abstract
There is a rising recognition of the crucial role self-care plays in managing heart failure (HF). Yet patients often have difficulties implementing ongoing self-care recommendations into their daily lives. There is also recognition of the importance of theory for successful intervention design, and understanding of key factors for implementation so interventions fit a given context. Local key stakeholders can provide valuable insights to help understand relevant context-specific factors for intervention implementation. This study sought to engage stakeholders to explore and determine relevant contextual factors needed to design and facilitate successful implementation of an HF self-care intervention in the German health care system. A ranking-type Delphi approach was used to establish consensus from stakeholders (i.e., clinicians, patients, policymakers/potential funders) regarding eight factors (content, interventionist, target group, location, mode of delivery, intensity, duration, and format) to adequately define the components and implementation strategy of the intervention. Seventeen participants were invited to participate in the first Delphi round. A response rate of 94% (16/17) was achieved and maintained for all three Delphi rounds. Stakeholder consensus determined that nurses specializing in HF are the most appropriate interventionists, target groups should include patients and carers, and the intervention should occur in an outpatient HF clinic, be a mixture of group and individual training sessions, and last for 30 minutes. Sessions should take place more frequently in the beginning and less often over time. Local stakeholders can help determine contextual factors that must be taken into account for successful delivery of an intervention. This enables the intervention to be developed and applied based on these factors, to make it suitable for the target context and to enhance participation to achieve the desired outcomes., Competing Interests: Declaration of Conflicting InterestsThe authors declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.
- Published
- 2024
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777. Improving Interpretation of Evidence Relating to Quality of Life in Health Technology Assessments of Rare Disease Treatments.
- Author
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Nicod E, Lloyd AJ, Morel T, Meregaglia M, Upadhyaya S, Whittal A, Facey K, and Drummond M
- Subjects
- Humans, Rare Diseases therapy, Cost-Benefit Analysis, Patient Reported Outcome Measures, Quality of Life, Technology Assessment, Biomedical
- Abstract
Rare diseases are often severe, debilitating, life-limiting conditions, many of which occur in childhood. These complex conditions have a wide range of clinical manifestations that have a substantial impact on the lives of patients, carers and families and often produce heterogeneous clinical outcomes. Therefore, the evaluation of quality-of-life (QoL) impacts is important. In health technology assessment (HTA), patient-reported outcome measures (PROMs) and/or health state utility values (HSUVs) are used to determine QoL impacts of new treatments, but their use in rare diseases is challenging due to small and heterogeneous populations and limited disease knowledge. This paper describes challenges associated with the use of patient-reported outcomes (PROs)/HSUVs to evaluate QoL in HTA of rare disease treatments (RDTs) and identifies five recommendations to ensure appropriate interpretation of QoL impacts. These were derived from mixed methods research (literature reviews, appraisal document analyses, appraisal committee observations and interviews) examining the use of PROs/HSUVs in HTA of RDTs. They highlight that HTAs of RDTs must (1) understand the QoL impacts of the disease and of treatments; (2) critically assess PRO data, recognising the nuances in development and administration of PROMs/HSUVs, considering what is feasible and what matters most to the patient population; (3) recognise that lack of significant effect on a PRO does not imply no QoL benefit; (4) use different forms of evidence to understand QoL impacts, such as patient input; and (5) provide methodological guidance to capture QoL impacts on patients/carers., (© 2022. The Author(s), under exclusive licence to Springer Nature Switzerland AG.)
- Published
- 2023
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778. Consideration of quality of life in the health technology assessments of rare disease treatments.
- Author
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Nicod E, Meregaglia M, Whittal A, Upadhyaya S, Facey K, and Drummond M
- Subjects
- Cost-Benefit Analysis, Humans, Patient Reported Outcome Measures, Rare Diseases, Quality of Life, Technology Assessment, Biomedical methods
- Abstract
Objectives: Challenges with patient-reported outcome (PRO) evidence and health state utility values (HSUVs) in rare diseases exist due to small, heterogeneous populations, lack of disease knowledge and early onset. To better incorporate quality of life (QoL) into Health Technology Assessment, a clearer understanding of these challenges is needed., Methods: NICE appraisals of non-oncology treatments with an EMA orphan designation (n = 24), and corresponding appraisals in the Netherlands, France, and Germany were included. Document analysis of appraisal reports investigated how PROs/HSUVs influenced decision-making and was representative of QoL impact of condition and treatment., Results: PRO evidence was not included in 6/24 NICE appraisals. When included, it either failed to demonstrate change, capture domains important for patients, or was uncertain. In the other countries, little information was reported and evidence largely did not demonstrate change. In NICE appraisals, HSUVs were derived through the collection of EQ-5D data (7/24 cases), mapping (6/24), vignettes (5/24), and published literature or other techniques (6/24). The majority did not use data collected alongside clinical trials. Few measures demonstrated significant change due to lack of sensitivity or face validity, short-term data, or implausible health states. In 8/24 NICE appraisals, patient surveys or input during appraisal committee meetings supported the interpretation of uncertainty or provided evidence about QoL., Conclusions: This study sheds light on the nature of PRO evidence in rare diseases and associated challenges. Results emphasise the need for improved development and use of PRO/HSUVs. Other forms of evidence and expert input are crucial to support better appraisal of uncertain or missing evidence., (© 2021. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.)
- Published
- 2022
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779. Facilitating [corrected] More Efficient Negotiations for Innovative Therapies: A Value-Based Negotiation Framework.
- Author
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Whittal A, Jommi C, De Pouvourville G, Taylor D, Annemans L, Schoonaert L, Vermeersch S, Hutchings A, and Patris J
- Subjects
- Humans, Uncertainty, Negotiating, Therapies, Investigational
- Abstract
Objectives: An increasing number of innovative therapies (e.g., gene- and cell-based treatments) have been developed in the past 20 years. Despite the significant clinical potential of these therapies, access delays may arise because of differing perspectives of manufacturers and payers regarding issues such as the value of the product, clinical and financial uncertainties, and sustainability.Managed entry agreements (MEAs) can enable access to treatments that would not be reimbursed by conventional methods because of such concerns. However, although MEA typologies exist, there is currently no structured process to come to agreements on MEAs, which can be difficult to decide upon and implement.To facilitate more structured MEA negotiations, we propose a conceptual "value-based negotiation framework" with corresponding application tools., Methods: The framework was developed based on an iterative process of scientific literature review and expert input., Results: The framework aims to (i) systematically identify and prioritize manufacturer and payer concerns about a new treatment, and (ii) select a mutually acceptable combination of MEA terms that can best address priority concerns, with the lowest possible implementation burden., Conclusions: The proposed framework will be tested in practice, and is a step toward supporting payers and manufacturers to engage in more structured, transparent negotiations to balance the needs of both sides, and enabling quicker, more transparent MEA negotiations and patient access to innovative products.
- Published
- 2022
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780. The Use of Patient-Reported Outcome Measures in Rare Diseases and Implications for Health Technology Assessment.
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Whittal A, Meregaglia M, and Nicod E
- Subjects
- Humans, Patient Reported Outcome Measures, Psychometrics, Quality of Life, Rare Diseases therapy, Technology Assessment, Biomedical
- Abstract
Background: Patient-reported outcome measures (PROMs) are used in health technology assessment (HTA) to measure patient experiences with disease and treatment, allowing a deeper understanding of treatment impact beyond clinical endpoints. Developing and administering PROMs for rare diseases poses unique challenges because of small patient populations, disease heterogeneity, lack of natural history knowledge, and short-term studies., Objective: This research aims to identify key factors to consider when using different types of PROMs in HTA for rare disease treatments (RDTs)., Methods: A scoping review of scientific and grey literature was conducted, with no date or publication type restrictions. Information on the advantages of and the challenges and potential solutions when using different types of PROMs for RDTs, including psychometric properties, was extracted and synthesized., Results: Of 79 records from PubMed, 32 were included, plus 12 records from the grey literature. PROMs for rare diseases face potential data collection and psychometric challenges resulting from small patient populations and disease heterogeneity. Generic PROMs are comparable across diseases but not sensitive to disease specificities. Disease-specific instruments are sensitive but do not exist for many rare diseases and rarely provide the utility values required by some HTA bodies. Creating new PROMs is time and resource intensive. Potential solutions include pooling data (multi-site/international data collection), using computer-assisted technology, or using generic and disease-specific PROMs in a complementary way., Conclusions: PROMs are relevant in HTA for RDTs but pose a number of difficulties. A deeper understanding of the potential advantages of and the challenges and potential solutions for each can help manage these difficulties., (© 2021. The Author(s).)
- Published
- 2021
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781. Examining the impact of different country processes for appraising rare disease treatments: a case study analysis.
- Author
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Whittal A, Nicod E, Drummond M, and Facey K
- Subjects
- Belgium, Child, France, Germany, Humans, Rare Diseases therapy, Technology Assessment, Biomedical
- Abstract
Background: Conventional appraisal and reimbursement processes are being challenged by the increasing number of rare disease treatments (RDTs) with a small evidence base and often a high price. Processes to appraise RDTs vary across countries; some use standard processes, others have separate processes or adapted processes that explicitly deal with rare disease specificities. The objective of this study was to examine the impacts of different appraisal processes for two RDTs., Methods: A case study analysis was conducted using countries with different forms of appraisal processes for RDTs for which public health technology assessment (HTA) reports were available. Two contrasting RDTs were chosen according to the criteria: rare versus ultra-rare treatment, affecting child versus adult, life-threatening versus disabling. Information from public HTA reports for each country's RDT appraisal was extracted into templates, allowing a systematic comparison of the appraisals across countries and identification of the impact of the different processes in practice., Results: Reports from Belgium, England, France, Germany, Italy, Netherlands, Norway, Scotland, Sweden, and the USA were selected for nusinersen (for spinal muscular atrophy) and voretigene neparvovec (for inherited retinal disorders). Countries with separate or adapted processes had more consistent approaches for managing RDT-related issues during appraisal, such as stakeholder involvement and criteria to address the specificities of RDTs, creating more transparency in decision-making., Conclusions: Findings suggest that separate or adapted approaches for RDT appraisal may facilitate more structured, consistent decision-making and better management of RDT specificities.
- Published
- 2021
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782. What the guide does not tell you: reflections on and lessons learned from applying the COM-B behavior model for designing real life interventions.
- Author
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Whittal A, Atkins L, and Herber OR
- Subjects
- Behavior Therapy, Humans, Self Care, Self-Management
- Abstract
Substantial inconsistency exists in the effectiveness of existing interventions to improve heart failure (HF) self-care, which can be partially explained by the fact that self-management interventions often lack theoretical models that underpin intervention development. The COM-B behavior model is a comprehensive theoretical framework that can be used to develop effective, theory-based interventions. The aim of this article is to highlight the challenges and practical solutions when applying the COM-B model to HF self-care, in order to provide useful support for researchers intending to use the model for designing behavior change interventions. "The Behaviour Change Wheel" handbook provides a step-by-step guide to understand and change behavior. When following the guide, some practical and methodological challenges were encountered. Lessons learnt to overcome these challenges are reported. Although the handbook is a comprehensive guide for designing behavior change interventions, a number of challenges arose. For example, the descriptions provided in the guide were not always sufficient to make solid judgments on how to categorize determinants; narrowing down intervention possibilities to a manageable number and prioritizing potential behavior change techniques over others involved a certain amount of subjectivity in an otherwise highly systematic and structured approach. For the encountered challenges, solutions are provided to illustrate how the model was applied practically to design theory-based behavior change interventions. This article provides a useful reference for researchers' use of the COM-B behavior model, as it outlines challenges that may occur and potential solutions to overcome them., (© Society of Behavioral Medicine 2020. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.)
- Published
- 2021
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783. Applying the COM-B behaviour model to overcome barriers to heart failure self-care: A practical application of a conceptual framework for the development of complex interventions (ACHIEVE study).
- Author
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Whittal A, Störk S, Riegel B, and Herber OR
- Subjects
- Behavior Therapy, Female, Humans, Male, Motivation, Self Care, Heart Failure therapy, Self-Management
- Abstract
Background: Effective interventions to enhance adherence to self-care recommendations in patients with heart failure have immense potential to improve health and wellbeing. However, there is substantial inconsistency in the effectiveness of existing self-management interventions, partly because they lack theoretical models underpinning intervention development., Aim: To outline how the capability, opportunity and motivation behaviour model has been applied to guide the development of a theory-based intervention aiming to improve adherence to heart failure self-care recommendations., Methods: The application of the capability, opportunity and motivation behaviour model involved three steps: (a) identification of barriers and facilitators to heart failure self-care from two comprehensive meta-studies; (b) identification of appropriate behaviour change techniques to improve heart failure self-care; and (c) involvement of experts to reduce and refine potential behaviour change techniques further., Results: A total of 119 barriers and facilitators were identified. Fifty-six behaviour change techniques remained after applying three steps of the behaviour model for designing interventions. Expert involvement (n=39, of which 31 were patients (67% men; 45% New York Heart Association II)) further reduced and refined potential behaviour change techniques. Experts disliked some behaviour change techniques such as 'anticipated regret' and 'salience of consequences'. This process resulted in a final comprehensive list consisting of 28 barriers and 49 appropriate behaviour change techniques potentially enhancing self-care that was put forward for further use., Conclusion: The application of the capability, opportunity and motivation behaviour model facilitated identifying important factors influencing adherence to heart failure self-care recommendations. The model served as a comprehensive guide for the selection and design of interventions for improving heart failure self-care adherence. The capability, opportunity and motivation behaviour model enabled the connection of heart failure self-care barriers to particular behaviour change techniques to be used in practice., (Published on behalf of the European Society of Cardiology. All rights reserved. © The Author(s) 2020. For permissions, please email: journals.permissions@oup.com.)
- Published
- 2021
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784. Are supplemental appraisal/reimbursement processes needed for rare disease treatments? An international comparison of country approaches.
- Author
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Nicod E, Whittal A, Drummond M, and Facey K
- Subjects
- Cost-Benefit Analysis, Humans, Surveys and Questionnaires, Rare Diseases
- Abstract
Background: There is increasing recognition that conventional appraisal approaches may be unsuitable for assessing the value rare disease treatments (RDTs). This research examines what supplemental appraisal/reimbursement processes for RDTs are used internationally and how they can be characterised. A qualitative research design was used that included (1) documentation of country appraisal/reimbursement processes for RDTs via questionnaires, desk research and iterative interactions with country experts to produce country vignettes, and (2) a cross-country analysis of these processes to identify and characterise features in supplemental processes for RDTs, and compare them to countries without supplemental processes., Results: Thirty-two of the 37 invited countries participated in this research. Forty-one percent (13/32) use supplemental processes for RDTs. Their level of integration within standard processes ranged from low to high, characterised by whether they are separate or partially separate from the standard process, adapted or accelerated standard processes, or standard processes that may be applied to RDTs. They are characterised by features implemented throughout the appraisal process. These features are mechanisms that allow application of different standards to assess the value of the medicine, support to the appraisal/decision-making process, overcome the issues of lack of cost-effectiveness, or exempt from part of/the full appraisal/reimbursement process. They increase the likelihood of reimbursement by adjusting and/or foregoing part of the assessment process, or accepting to pay more for the same added benefit as for common conditions. A large proportion of countries with standard processes include one or more of these features (formally or informally) or are discussing potential changes in their systems., Conclusions: Results suggest revealed preferences to treat RDTs differently than conventional medicines. Some of the challenges around uncertainty and high price remain, but supplemental process features can support decision-making that is more flexible and consistent. Many of these processes are new and countries continue to adjust as they gain experience.
- Published
- 2020
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785. 'Mapping' Health State Utility Values from Non-preference-Based Measures: A Systematic Literature Review in Rare Diseases.
- Author
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Meregaglia M, Whittal A, Nicod E, and Drummond M
- Subjects
- Algorithms, Cost-Benefit Analysis, Humans, Neoplasms economics, Neoplasms psychology, Quality of Life, Rare Diseases economics, Research Design, Surveys and Questionnaires, Health Status, Patient Reported Outcome Measures, Rare Diseases psychology
- Abstract
Background: The use of patient-reported outcome measures (PROMs) to monitor the effects of disease and treatment on patient symptomatology and daily life is increasing in rare diseases (RDs) (i.e. those affecting less than one in 2000 people); however, these instruments seldom yield health state utility values (HSUVs) for cost-utility analyses. In such a context, 'mapping' allows HSUVs to be obtained by establishing a statistical relationship between a 'source' (e.g. a disease-specific PROM) and a 'target' preference-based measure [e.g. the EuroQol-5 Dimension (EQ-5D) tool]., Objective: This study aimed to systematically review all published studies using 'mapping' to derive HSUVs from non-preference-based measures in RDs, and identify any critical issues related to the main features of RDs, which are characterised by small, heterogeneous, and geographically dispersed patient populations., Methods: The following databases were searched during the first half of 2019 without time, study design, or language restrictions: MEDLINE (via PubMed), the School of Health and Related Research Health Utility Database (ScHARRHUD), and the Health Economics Research Centre (HERC) database of mapping studies (version 7.0). The keywords combined terms related to 'mapping' with Orphanet's list of RD indications (e.g. 'acromegaly') in addition to 'rare' and 'orphan'. 'Very rare' diseases (i.e. those with fewer than 1000 cases or families documented in the medical literature) were excluded from the searches. A predefined, pilot-tested extraction template (in Excel
® ) was used to collect structured information from the studies., Results: Two groups of studies were identified in the review. The first group (n = 19) developed novel mapping algorithms in 13 different RDs. As a target measure, the majority used EQ-5D, and the others used the Short-Form Six-Dimension (SF-6D) and 15D; most studies adopted ordinary least squares (OLS) regression. The second group of studies (n = 9) applied previously published algorithms in non-RDs to comparable RDs, mainly in the field of cancer. The critical issues relating to 'mapping' in RDs included the availability of very few studies, the relatively high number of cancer studies, and the absence of research in paediatric RDs. Moreover, the reviewed studies recruited small samples, showed a limited overlap between RD-specific and generic PROMs, and highlighted the presence of cultural and linguistic factors influencing results in multi-country studies. Lastly, the application of existing algorithms developed in non-RDs tended to produce inaccuracies at the bottom of the EQ-5D scale, due to the greater severity of RDs., Conclusions: More research is encouraged to develop algorithms for a broader spectrum of RDs (including those affecting young children), improve mapping study quality, test the generalisability of algorithms developed in non-RDs (e.g. HIV) to rare variants or evolutions of the same condition (e.g. AIDS wasting syndrome), and verify the robustness of results when mapped HSUVs are used in cost-utility models.- Published
- 2020
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786. Testing a Photo Story Intervention in Paper Versus Electronic Tablet Format Compared to a Traditional Brochure Among Older Adults in Germany: Randomized Controlled Trial.
- Author
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Tan SL, Whittal A, and Lippke S
- Abstract
Background: To increase effective communication in primary care consultations among older adults in Germany, the photo story is considered to be a useful tool based on Bandura's social cognitive theory. With information technology helping to increase effective communication, the use of tablets is gaining attention in health care settings, especially with older adults. However, the effectiveness of tablet technology and photo stories has rarely been tested., Objective: The aim is to compare the effectiveness of a photo story intervention to a traditional brochure. Both were delivered either in paper or tablet format., Methods: A trial was conducted with 126 older adults, aged 50 years and older, who were approached and recruited by researchers and administrative staff from senior day care, doctors in rehabilitation centers, and trainers in sports clubs in Germany. Open and face-to-face assessment methodologies were used. Participants were randomly assigned to one of four intervention conditions: traditional brochure in paper format (condition 1) and tablet format (condition 2), and photo story in paper format (condition 3) and tablet format (condition 4). Each participant received a questionnaire and either the traditional brochure or photo story in a paper or tablet version. To evaluate the effectiveness of each intervention, participants completed evaluation questionnaires before and after each intervention. The second part of the questionnaire measured different indicators of health literacy, communication skills, health measurements, and possible underlying mechanisms., Results: Compared to the traditional brochure, participants considered the photo story easier to understand (t
124 =2.62, P=.01) and more informative (t124 =-2.17, P=.03). Participants preferred the paper format because they found it less monotonous (t124 =-3.05, P=.003), less boring (t124 =-2.65, P=.009), and not too long (t124 =-2.26, P=.03) compared to the tablet format. Among all conditions, the traditional brochure with a tablet (condition 2) was also perceived as more monotonous (mean 3.07, SD 1.08), boring (mean 2.77, SD 1.19), and too long to read (mean 2.50, SD 1.33) in comparison to the traditional brochure in paper format (condition 1). Moreover, the participants scored significantly higher on self-referencing on the traditional brochure in paper format (condition 1) than tablet format for both types of the brochure (conditions 2 and 4)., Conclusions: Traditional brochures on a tablet seem to be the least effective communication option in primary care consultations among all conditions for older adults. The findings might be specific for the current generation of older adults in Germany and need to be replicated in other countries with larger sample sizes. Although information technology brings advantages, such as effective interventions in different fields and settings, it may also come with several disadvantages, such as technical requirements of the users and devices. These should be considered when integrating information technology into wider situations and populations., Trial Registration: ClinicalTrials.gov NCT02502292; https://clinicaltrials.gov/ct2/show/NCT02502292 (Archived by Webcite at http://www.webcitation.org/747jdJ8pU)., (©Shu Ling Tan, Amanda Whittal, Sonia Lippke. Originally published in JMIR Aging (http://aging.jmir.org), 06.12.2018.)- Published
- 2018
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787. Allelic variation of vernalization and photoperiod response genes in a diverse set of North American high latitude winter wheat genotypes.
- Author
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Whittal A, Kaviani M, Graf R, Humphreys G, and Navabi A
- Subjects
- Canada, Flowers growth & development, Gene Expression Regulation, Plant, Gene Frequency, Genotype, Phenotype, Plant Breeding, Plant Proteins genetics, Seasons, Temperature, Triticum growth & development, Alleles, Flowers genetics, Genetic Variation, Photoperiod, Triticum genetics
- Abstract
The major physiological determinants of wheat (Triticum aestivum L.) phenology in a given area are a response to vernalization temperature and day length, which are at least in part, regulated by the allelic variation at the vernalization (VRN) and photoperiod (PPD) loci, respectively. Characterization of the existing genetic variation for plant phenology in winter wheat can assist breeding programs improve adaptation to local environments and to optimize wheat phenology for the changing climate. The objectives of this research were to characterize the allelic variation at the major VRN and PPD loci in a diverse panel of high latitude winter wheat genotypes (n = 203) and to associate the allelic variation with phenologic, agronomic and adaptation traits. The panel was genotyped using allele-specific markers at vernalization (VRN-A1, VRN-B1, VRN-D1 and VRN-B3) and photoperiod (PPD-A1, PPD-B1, and PPD-D1) loci and phenotyped for agronomically-important traits. Though photoperiod sensitivity was more prevalent, most of the variation in the phenology of the winter wheat panel was explained by allelic variation at PPD-D1, PPD-A1, and the interaction between these loci. While a typical high latitude winter wheat genotype is one that carries winter alleles at all major VRN loci and photoperiod sensitive alleles at the major PPD loci, in lower latitudes where winters are milder, the presence of one or two photoperiod insensitive alleles seems to contribute to higher yield and wider adaptation., Competing Interests: The authors have declared that no competing interests exist.
- Published
- 2018
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788. Investigating acculturation orientations of patients with an immigration background and doctors in Canada: implications for medical advice adherence.
- Author
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Whittal A, Hanke K, and Lippke S
- Subjects
- Adult, Aged, Canada, Female, Humans, Male, Middle Aged, Surveys and Questionnaires, Acculturation, Emigration and Immigration legislation & jurisprudence, Patient Compliance statistics & numerical data, Physician-Patient Relations ethics, Quality of Life psychology
- Abstract
Background: Increased immigration requires successful interaction of different cultures in various life domains, such as health. This study investigates acculturation orientation (AO) of immigrant patients and doctors native to the country, as a potential factor related to perceived medical advice adherence., Data and Methods: N = 171 immigrant patients (M = 54.38 years, SD = 17.94, range = 23-96, 74.3 % female) and their N = 12 doctors (M = 38.88 years, SD = 13.42, range = 27-66, 83 % female) from a hospital in Montreal, Canada, participated in a paper-based survey to assess AOs, patients' perceived expectations of their doctor (regarding adopting the new culture or keeping their previous culture), doctors' actual expectations, perceived quality of care and perceived adherence., Results: AO of patients significantly related to perceived adherence, via a path model involving perceptions of doctors' expectations and perceived quality of care. Integration was positively related to perceived adherence, while Marginalization was negatively related to it. Doctors' AOs were not significant., Conclusion: Patient perceptions seem to be a significant factor to be considered when striving to improve immigrant medical advice adherence.
- Published
- 2017
- Full Text
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789. The veterinary profession: the public's opinion as viewed by the urbanite.
- Author
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Whittal A
- Subjects
- Canada, Public Opinion, Urban Population, Veterinary Medicine
- Published
- 1976
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