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Multi-Layered Films Containing a Biomimetic Stimuli-Responsive Recombinant Protein
Barbosa JS,Costa RR,Testera AM,Alonso M
Nanoscale Research Letters , 2009,
Abstract: Electrostatic self-assembly was used to fabricate new smart multi-layer coatings, using a recombinant elastin-like polymer (ELP) and chitosan as the counterion macromolecule. The ELP was bioproduced, purified and its purity and expected molecular weight were assessed. Aggregate size measurements, obtained by light scattering of dissolved ELP, were performed as a function of temperature and pH to assess the smart properties of the polymer. The build-up of multi-layered films containing ELP and chitosan, using a layer-by-layer methodology, was followed by quartz-crystal microbalance with dissipation monitoring. Atomic force microscopy analysis permitted to demonstrate that the topography of the multi-layered films could respond to temperature. This work opens new possibilities for the use of ELPs in the fabrication of biodegradable smart coatings and films, offering new platforms in biotechnology and in the biomedical area.
Análisis de los factores determinantes de la transparencia en RSC en las empresas espa olas cotizadas
Adrian Testera Fuertes,Laura Cabeza García
Intangible Capital , 2013, DOI: http://dx.doi.org/10.3926/ic.311
Abstract: Objeto: Este trabajo pretende profundizar en los determinantes de la divulgación de información sobre las acciones sociales que las empresas realizan. En particular, se centra en el papel que puede jugar un factor apenas considerado hasta el momento como es la estructura de propiedad.Dise o/metodología: Con el objetivo anterior, a partir de una muestra de empresas espa olas cotizadas en el a o 2008 hemos realizado un análisis de regresión lineal para analizar cómo la identidad del principal accionista de la empresa así como otras características empresariales afectan a la transparencia en RSC.Aportaciones y resultados: En contra de lo esperado, los resultados sugieren que la identidad del principal accionista no afecta a la transparencia informativa en RSC. Por el contrario, son otras características, como el tama o de la empresa, su nivel de endeudamiento así como su nivel de transparencia en general, las que parecen explicar la transparencia sobre acciones socialmente responsables.Limitaciones: La existencia de otros indicadores de transparencia en RSC así como el haber realizado el estudio en un único país y en un momento temporal concreto, hace necesario ser cautos sobre los hallazgos obtenidos.Valor a adido: Un número reducido de estudios ha analizado la influencia de la estructura de propiedad en la transparencia en RSC, y además, de los pocos trabajos existentes, la mayoría se han centrado en el grado de concentración de la propiedad y no han tenido en cuenta la identidad o tipología del primer accionista.
Experimental evaluation of beef breed utilization strategies
AM Carter
Genetics Selection Evolution , 1980, DOI: 10.1186/1297-9686-12-1-117a
Valoración del consumo de masas orgánicas durante la actividad deportiva
Diaeta , 2011,
Abstract: the evaluation of organic mass consumption and energy expenditure incurred during certain events was carried out by applying the balance method designed by newburgh lh and modified by gilder h. this method is proposed to be applied in individual sporting events such as marathons, cycling and tennis. the method has been validated by means of indirect calorimetry. the formulas are detailed in excel format.
Species Distrbution within Riparian Landcape along Mayo Kam of Gashaka Taraba State, Nigeria
AM Mubi
Ethiopian Journal of Environmental Studies and Management , 2012,
Abstract: The study examines species density and diversity distribution in riparian landscape along 18km stretch of Mayo Kam. Total of 117 Samples quadrants of 125m2 (46), 225m2 (25), and 275m2 (46) from strata 5m (zone A), 9m (zone B), and 11m (zone C) respectively away from the Channel Bank Edge (CBA) through the Hydraulic Floodplain (HFP) and the Genetic Floodplain (GFP) were delineated and detailed survey was carried out. Data was collected on river bank morphology, altitude a.m.s.l., slope gradient, soil type, and tree species density and diversity. Result of species distribution revealed mean densities and diversities in zones A, B, and C as, 10 and 4 per 125m2, 10 and 3 per 225m2, and 23 and 5 per 275m2 respectively. Accordingly, density and diversity per 625m2 show maximum of 83 and 8 and minimum of 5 and 5 on outer convex bank and inner straight bank. Brachystigia eurycoma, Vetix doniana, Andria enermis and Diospyrus spp are the obligates of zone A. Characterizing zone B are Anogeisus leocarpus, Peninari excelsa, Crossoptyx februfuga and Nauclea latifolia species while, common species in zone C are Uapaka togoensis, Terminalia glaucoscens, and Grewia mollis. The dense and diverse pattern in the distribution within the three zones is importantly due to relative location of stratum from channel flow (variation in moisture availability), morohologic form, soil type and slope gradient. Key Words: Bank form, density, diversity, landscape, Mayo Kam, riparian, species
Knowledge, attitude and practice of nurses toward peak expiratory flow meter in primary health care centers in Kuwait
AM Hajia
Alexandria Journal of Medicine , 2011,
Abstract: Background: Peak expiratory flow meter (PEFM) is an easy to use, relatively cheap device that can be used for guiding management of bronchial asthma by the patients at home according to a preset plan by health care workers. Objective: The aim of the study is to reveal the extent of knowledge and perception of nurses about PEFM and factors affecting their knowledge. Methods: Out of the total primary health care centers in Kuwait, 50% were randomly selected. Out of 699 nurses currently working in the selected centers, 516 nurses were interviewed for this study with an overall response rate of 73.8%. Results: The results of this study showed that nurses had a relatively low total knowledge score percent of 64.7 ± 7.3%. The lowest individual mean percent score was that of procedures and steps of measuring peak expiratory flow rate (39.0 ± 24.1%). The highest percent knowledge score was that of benefits of use and content instructions for teaching patients (78.3 ± 19.5% and 78.1 ±12.0%, respectively). Sociodemographic factors did not affect the total knowledge score. Receiving training, availability of PRFM in the health center and being responsible about taking the measurements for patients proved to significantly affect the level of knowledge of nurses. Conclusion: Training nurses about use of PEFM and providing primary health care centers with the devices would plan an important role to improve knowledge of nurses and hence improve domestic health care of patients with obstructive lung diseases.
Improving Performances in the Public Sector: The Scientific Management Theory of F W Taylor and Its Implications for Library and Information Services
AM Ibrahim
Information Manager (The) , 2007,
Abstract: The need for improve performances in organization has always been a source of concern for management in both the public and the private sector. This paper sought to discuss the principle of scientific management theory as propounded by F.W. Taylor with the aim of ensuring that public services organizations adopts the principles for enhanced productivity, efficiency and the attainment of organizational objectives. The paper highlighted the principles of scientific management theory, and it explores how public service sector, notably the Library and Information Science segment in Nigeria, can benefit from its well tested principles. The main reason for the paper is the apparent inefficiency of the public sector, as observed and reported by several scholars over time. The Information Manager Vol. 7 (2) 2007: pp. 40-45
Nigerian home video movies and enhanced music involvement
AM Makhu
Creative Artist: A Journal of Theatre and Media Studies , 2010,
Abstract: The Video Film Industry in Nigeria has attracted much attention within the shores of Nigeria, Africa and beyond in Asia and in Europe. The popular acclaim trailing the industry not withstanding, there has arisen in several fora, critical assessment of the contents of the work churned out in great quantum. One such area that has elicited comment is the area of music involvement which is seen by many as significantly ignored by producers or inadequately represented. The concern of this paper is to put in proper perspective the significance of music involvement in Nigerian video films thus opening windows of opportunities for film makers and users in a bid to fostering a better appreciation of the genre.
Comments on Regulation Issues in Modern Art Practice in Nigeria
AM Diakparomre
African Research Review , 2010,
Abstract: The practice of the visual arts in post-independence Nigeria has been variedly characterized. This has been more so since 1977 when the 2nd World Black and African Festival of Arts and Culture was held in Nigeria. This epochal event is, today, said to have engendered mercantilism, a decline in standard of art products, and a laisser-faire attitude towards art practice in Nigeria. These, it is said, have singly and collectively affected the status and working conditions of the Nigerian artist. It is also said that the practice of the arts, as well as the artist, are in jeopardy, at the moment. To remedy this situation, it is suggested by some, that the practice of the arts be regulated and that a code of conduct should be instituted. These suggestions are interrogated in this paper with the aim of finding out the suitability of these prescriptions for solving the identified problems in a 21st century art environment. The interrogation identifies that resorting to regulation would amount to imprisoning creativity and lead to retrogression.
The Use of Tissue Expanders in Hypospadias Cripples and Complex Anterior Urethral Stricture: Early Experience
AM Shaaban
African Journal of Urology , 2004,
Abstract: Objective: This procedure was introduced to evaluate the use of tissue expanders in patients with complex anterior urethral strictures and hypospadias cripples where there is not enough healthy penile skin to bridge the urethral defect or to cover the neourethra. Patients and Methods: Six patients with a mean age of 23.3 years were included in this study. Four patients presented with complex hypospadias after failed multiple repairs. Three of them presented with penoscrotal meatus, residual chordee and scarred ventral penile skin. The fourth patient had multiple proximal fistulas with a scarred narrow distal urethra. The fifth patient was circumcised with a concealed penis and a congenitally short urethra. The sixth patient was referred from another institution after previous unsuccessful urethrotomies and urethroplasties. He had a curved penis, a calcified urethral plate and a proximal penile urethral meatus after first-stage Johanson procedure. The tissue expander was placed under the dorsal penile skin through a subcoronal incision. Penile skin expansion was performed gradually over 5-8 weeks. Urethroplasty was then performed using the Thiersch-Duplay technique with penile covering using the excess dorsal penile skin. Results: Expansion of the dorsal penile skin was performed successfully in all cases. There were no complications related to the use of tissue expanders except for minimal discomfort at the start of expansion. Complications related to urethroplasty included mild skin infection and temporary penoscrotal urethrocutaneous fistula (which closed spontaneously), a subcoronal fistula that required surgical closure and disruption of the glandular sutures in one case each. Conclusions: The initial good results of this technique are encouraging in patients presenting after multiple failed urethroplasties. It seems to provide an alternative to free grafts, which at present is the only solution for such cases. However, further evaluation on a larger number of patients is required. L\'utilisation des expanseurs de tissu dans le traitement de l\'hypospadias et du rétrécissement urethral antérieur complexe: Une première expérience Objectifs : Evaluer l\'utilisation des expanseurs de tissu chez les patients présentant des rétrécissements uréthraux antérieurs complexes et les hypospadias où il n\'y a pas assez de peau pénienne saine pour couvrir le défect uréthral ou pour réaliser un néo urèthre. Patients et méthodes: Six patients présentant un age moyen de 23,3 ans ont été inclus dans cette étude. Quatre patients se sont présentés avec des hypospadias complexes après échec de réparations multiples. Trois d\'entre eux ont présenté un méat péno-scrotal, une chordee résiduelle et une peau pénienne ventrale de mauvaise qualité. Le quatrième patient a eu des fistules proximales multiples avec un rétrécissement marqué de l'urètre distal. Le cinquième patient a été circoncis avec un pénis enfui et un urèthre congénitalement court. Le sixième patient a
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