178 research outputs found
Manyetik nanopartikül senteziyle üretilen adsorban ile sucul ortamdan amoksisilin ve tetrasiklin ilaç etken maddelerin giderimi
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Utilization of Palm Wastes for Production of Invert Sugar
No full textAbstractAn economically attractive technique was adopted using date palm fibers as a new carrier for invertase adsorption and for invert sugar production. Experiments were carried out to evaluate the results of incubation of Baker's yeast with palm fibers in aqueous solution at 40° C for half an hour. CO2 produced from this reaction was employed as a reactant and it succeeded to modify the cellulosic surface of the palm fibers. This increased the capacity of invertase that had been secreted from Baker's yeast to be immobilized tightly on the cellulosic surface of the fibers. These results confirmed by FTIR and SEM. Characterization of the enzyme indicated that 1 gram of immobilized invertase on such wastes can produce 600mg of invert sugar. By this technique, Egypt would be able to supply 6 million kg invert sugar per year. Molasses used instead of sucrose to assess the sustainability of the process
Public Policy Development and Implementation in the United Arab Emirates. A study of organizational learning during policy development and implementation in the Abu Dhabi Police and the United Arab Emirates Ministry of Interior
No full textThis reflective analysis of the Emirati public policy process (PPP) cycle and implications of uneven application of new public management (NPM) paradigms in the UAE offers insight into the way that public administrations develop, learn, evolve, and cope with new challenges during the policy development process. The author also assesses the relationship between organizational learning and organizational practices, to generate practical knowledge and experience that is translated into recommendations that will benefit UAE government organizations, and indeed any public sector organization in the Gulf Region.
Inside action research was chosen to emphasize the author's dual role as both a researcher and a participant. As an advisor to both the Ministry of the Interior (MOI) of the UAE and the Abu Dhabi Police (ADP), the author helped both organisations improve their PPP experiences while researching the challenges, learning, and adaptations which occurred while policy was being developed within the MOI. The author generated data through reflective memos, informal interviews, and document analysis, and presents her findings in terms of both academic findings and practice-oriented recommendations.
The author primarily found that new models were necessary to reflect the highly flexible and authority-oriented UAE PPP cycle. The author also explored how cultural understandings led to challenges with NPM and learning in the UAE public administration, hindering policy development. Finally, the author found that her own position, as a female expatriate in the Emirati government, allowed for some valuable reflection about experience of serving in a Global South public administration
Impact of socioeconomic and behavioral factors on oral health of adult Americans: analysis of the 2011-2016 NHANES data
No full textOral health is a critical determinant of overall health with reported links to adverse chronic conditions such as cardiovascular disease. Several risk factors related to lifestyle behaviors and socioeconomic characteristics have direct influence on the oral health status. In order to establish specific oral health care measures the relationship of demographics and behavioral factors specifically dietary and smoking habits with oral health was examined. The individual socio-demographic and major dietary characteristics were analyzed using univariate models, while the interaction of these factors with general oral health was evaluated as a multivariate model using a binary logistic regression. The dataset from 2011-2016 National Health and Nutrition Examination Survey targeting civilian, non-institutionalized adults living in the 50 States of USA and the District of Columbia was used to conduct this secondary analysis. Findings indicate health insurance was associated with a lower risk for urgent dental treatment [F(1, 47)=212.2, P< 0.001] and untreated dental caries (OR = 1.6, P<0.001). Older age group was found to experience more tooth loss (OR =19.9, P< 0.001) and less likely to suffer from dental decay (OR =077, P=0.007), while African-Americans were more likely to experience both dental decay and tooth loss (OR =1.75, P<0.001, OR =2.2, P<0.001, respectively). The prevalence of tooth decay in U.S adults aged 20 years and above was approximately 21%. Current smokers [F(2, 94) = 143, P < 0.001] and males [F(1, 47)=64.4, P < 0.001] were more likely to need urgent dental care. Higher sugar intake was associated with poor oral health. Modifiable unhealthy lifestyle behaviors, gender, age, ethnicity and health insurance are important predictors of poor oral health status in adult population. Collectively, these findings provide important insights into the relationship between multiple behavioral as well as socioeconomic factors and oral health that have considerable public health implications and can be an important measure to monitor the progress of health promotion goals set by public health programs.Ph.D.Includes bibliographical reference
Diagnostic accuracy of apparent diffusion coefficient value in differentiating metastatic form benign axillary lymph nodes in cancer breast
No full textPurpose: To detect axillary lymph node metastasis based on diffusion Weighted MR and apparent diffusion coefficient (ADC) in the known breast cancer cases.
Patient and methods: Forty-four patients were included in this study for preoperative MRI staging of the breast cancer and axillary lymph node assessment. The lymph node criteria (long/short-axis ratio, T2WI, DWI and ADC value) were included in the analysis. Images were obtained with diffusion sensitizing gradients of 0 and 750 mm2/s. The ADC was calculated.
Results: Thirty-two patients had metastatic axillary lymph nodes and 12 cases had no malignant LN involvement. There was no significant difference between both in S/L ratio, T2WISI (p < 0.140 & p = 0.079, respectively), while statistically significant difference between benign and malignant lymph nodes in both DWI and ADC mean values (p < 0.0001 & p < 0.007, respectively). The optimal ADC cut off value was ⩽.8 × 10−3 mm2/s for differentiation between benign and malignant lymph nodes with accuracy 96.7%, sensitivity 100%, specificity 87%, PPV 95.4% and NPV 100%.
Conclusion: Compared with lymph node size or routine magnetic resonance sequences, DWI and ADC are promising techniques for differentiating metastatic and non metastatic axillary lymph nodes in known breast cancer patients
Utility of 128-multislice CT virtual HSG in assessment of female infertility
No full textAbstractObjectiveThe aim of this study to assess the utility of 128-MDCT VHSG in evaluation of different female infertility causes.Patients and methodsForty eight infertile female patients were included in the study, which was conducted in Radiodiagnosis Department, Zagazig University Hospitals from November 2014 to May 2015. MDCT Hysterosalpingography was performed between days 6 and 12 of the menstrual cycle at least 48hours after menses.Resultswe compared findings of MDCT-VHSG with hysteroscopy or/ and laparoscopy results. We found that MSCT-VHSG more accurate in diagnosis of uterine and ovarian infertility causes, while less accurate in the diagnosis of tubal causes. The sensitivity for detecting uterine and fallopian tubes pathology by MDCT-VHSG was 100% and 100% respectively, while the specificity was 100%, 85.71% respectively. MDCT-VHSG had reported 100% and 92.85% PPV in detecting uterine and fallopian tubes pathology respectively, while the NPV was 100% and 100% respectively.ConclusionThe MDCT-VHSG is a diagnostic modality which permits the evaluation of the different causes of the female infertility, but still limited value in assessment of peritubal adhesions
Magnetic resonance cholangiopancreatography in conjunction with 3D for assessment of different biliary obstruction causes
No full textAbstractObjectiveTo assess the diagnostic value of magnetic resonance imaging in conjunction with 3D-MRCP, with maximum intensity projections and volume rendered images in different biliary obstruction causes.Patient and methodsThis study retrospectively reviewed the radiology records of 29 patients (18 females and 11 males) suffering from obstructive jaundice. All patients were subjected to magnetic resonance imaging (MRI), 3D-MRCP with maximum intensity projection (MIP) and volume rendered (VR) reformatted images for biliary obstruction diseases in Zagazig University Hospitals between November 2008 and January 2010. MR studies were performed with 1.5-T superconductive magnet (Philips Achieva, class II a). The patient ages were ranging from 23 to 66years (mean age: 34years). This study was done to evaluate the diagnostic value and accuracy of the new MRI techniques as a non-invasive tool to diagnose and differentiate between benign and malignant variants of biliary obstruction diseases and to facilitate the management planning. All cases were evaluated by clinical examination, laboratory values, grey and colored scale ultrasonography, conventional MRI, three-dimensional (3D-MRCP), MIP, and VR images. Our results were correlated with the histology of the resected specimen, operative (ERCP) or image-guided biopsy in inoperable patients.ResultsThe mean age of benign patients was 30years compared with 54years in malignant biliary obstruction. Seventeen patients had benign cases 58.6% (6 cases of benign stricture and 11 cases with choledocholithiasis). The other 12 cases had malignant aetiology. Twenty-three patients were subjected to operative procedures, while the remaining six had ERCP/PTC and stenting. The MRI/MRCP images were of good quality in all patients. The intra- and extra-hepatic biliary radicals were visualized completely including the proximal and distal extent of the stricture. Regarding the benign cases (16/17) were satisfactorily diagnosed, however, one case was false negative, due to missed small stone at the MIP reconstructions. The 12 malignant biliary obstruction cases were as follows: five cases were cholangiocarcinoma (one peripheral type, one perihilar position, one Klatskin’s type, and two cases of the distal type), three pancreatic neoplastic lesions, two ampullary carcinoma, and two malignant lymph nodes. Regarding the benign cases 3D-MRCP had 94.1% diagnostic accuracy, otherwise more accuracy reported in malignant causes 100%.Conclusion3D-MRCP with MIP creates global images for pancreatico-biliary system. It is as effective as ERCP in detection of biliary obstruction and can precisely determine its level as well. Furthermore, it can provide a road map for management planning. By avoiding the flow artifacts, the false negative results that previously reported in past studies can be reduced
User’s behavior in the Space of the interactive Activity’s Hall
No full textThe interactive inner space has become an integral part of the internal spaces that aim to spread culture and learning, to facilitate the delivery of thought and culture to all groups of the interacting society within the vacuum in all its age groups and also urges them to be creative and innovative. The interior designer aims to integrate the interior space with interactive technology, To discover every new result of technological progress, it may start by trying to employ new materials that technology has produced.And the research study here touched on to highlight the user's behavior inside the vacuum taking into consideration the type of activity taking place, and how to interact with the user by studying his behavior within the interactive activity environment to reach the highest efficiency and benefit from the interaction and integration between reality and imagination taking into account the requirements of functional, aesthetic, human and technological internal design.The interactive activity environment is a virtual environment in which reality and imagination are combined using modern methods and techniques, in which different forms of interaction between the user and the user occur, and between the user and another and finally between the user and interactive space tools and design elements. The interaction environment is an integrated continuous interactive circle through the compatibility of internal design elements such as walls, floors, roofs and work surfaces to serve the activity in the internal space with a study of the age group of users and their requirements and psychological and technological factors during the interaction; hence, that system is activated by choosing the appropriate interactive system to serve and enhance the requirements of the internal space Interactive.Thus, the circle of interaction within the vacuum is closed by the presence of an integrated vacuum in terms of the interactive system and communication between it and the user under the supervision of the specialist, and that the system includes methods for learning and innovation and obtaining new information related to the activity, the presence of specialists and educating those in work in the activity halls how to deal with and facilitate the interactive system On users.With clarification by mentioning an application of interactive activity within the space of a digital interactive museum for children
Determinants of sustainability reporting decision: evidence from Pakistan
No full textWe investigate the determinants of corporate sustainability reporting decision. We use a logistic regression model to analyse data collected from a sample of 138 firms listed on the Pakistan Stock Exchange for the years 2009–2018. We find that firms with more gender-diverse boards, larger audit committees and higher institutional ownership are more likely to issue sustainability reports. We also find that concentrated ownership, managerial ownership, foreign ownership and audit committee independence negatively influence the firms' sustainability reporting decision. The findings provide valuable insight to Pakistani policymakers by identifying the attributes that require regulatory focus to achieve the public policy objective of sustainable development. We are the first to explore the determinants of sustainability reporting decision in Pakistan. It provides empirical evidence to regulators and policymakers in Pakistan and other emerging markets who have already adopted a governance framework and are considering sustainability reporting in their respective contexts
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