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  • 1
    Electronic Resource
    Electronic Resource
    Synthesis, characterization, and kinetic study on the thermal decomposition of polyamidoethers (1989)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 37 (1989), S. 1559-1565 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Some new polyamidoethers have been synthesized by condensation reaction of N,N'-dichloroacetyl-1,4-phenylene-diamine with bisphenols (4,4'-isopropylidenediphenol, 4,4'-dihydroxydiphenyl sulfone, 4,4'-dihydroxydiphenyl sulfide, and 4,4'-dihydroxybiphenyl) in N-methylpyrrolidone medium using DB-24-Crown-8 as a phase-transfer catalyst. The structure of these polymers has been characterized by infrared (i.r.) and 1H nuclear magnetic resonance (NMR) spectroscopy. Kinetic method of thermal decomposition of these polymers and their 2% mixture with polyvinylchloride (PVC) has been studied.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1989.070370610
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Quantitative and qualitative IR studies of some synthesized aromatic polysulfides (1986)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 31 (1986), S. 2315-2323 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Quantitative and qualitative IR analysis of some synthesized aromatic homo polysulfides and copolysulfides based on 4,4-oxydibenzenethiol (IV), 4,4-dimercaptodiphenyl sulfide (I) and bis-(4-fluorophenyl) Sulfone (II) in 1-methyl-2-pyrrolidone (NMP) has been done. A satisfactory agreement of experimental results with theory was observed.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1986.070310728
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    The properties of some poly(arylene ether sulfones) (1980)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 25 (1980), S. 821-828 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Some 2,4′-substituted poly(arylene ether sulfones) have been prepared and their properties compared with those of the conventional 4,4′ homopolymer. The introduction of the comonomer leads to a small increase in yield stress and to a greater tendency to brittle fracture, which can be demonstrated from fracture surface micrographs.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1980.070250510
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  • 4
    Electronic Resource
    Electronic Resource
    Synthesis of Uridine with Methylene-2-thiohydantoin as 5-Substituent (1994)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1994 (1994), S. 619-621 
    Details
    ISSN: 0170-2041
    Keywords: Uridine, methylene-2-thiohydantoin derivative ; Nucleosides ; 2-Thiohydantoin ; Herpes simplex virus ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 5-Formyl-1-(2,3,5-tri-O-acetyl-β-D-ribofuranosyl)uracil (4) was synthesized from 5-formyluracil (2) and 1,2,3,5-tetra-O-acetyl-β-D-ribofuranose (3) and condensed with 2-thiohydantoin derivatives 5 by using piperidine as the catalyst to give 5-(uridin-5-ylmethylene)-2-thiohydantoin (8a) and 3-phenyl-5-(uridin-5-ylmethylene)-2-thiohydantoin (8b) after deprotection with sodium methoxide in methanol. Compound 8a was also obtained in an inversed reaction sequence from 5-formyluracil starting with condensation with 2-thiohydantoin and then with 3. The compounds 8a and 8b did not show any activity against HSV-1 or HIV-1.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.199419940613
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  • 5
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    Extracellular biosynthesis of anti-Candida silver ‎nanoparticles using Monascus purpureus (2015)
    Wiley-Blackwell
    Details
    Publication Date: 2015-10-31
    Description: An eco-friendly process for the silver nanoparticles (Ag-NPs) biosynthesis was investigated using the fungus Monascus purpureus as a safe and commercially used microorganism. M. purpureus growth filtrate was used for the reduction of the aqueous silver nitrate into Ag-NPs with almost 100% size range of 1–7 nm, which was considered as one of the smallest microbial biosynthesized Ag-NPs. The biosynthesized Ag-NPs were structurally characterized using UV, FTIR, DLS, TEM, and XRD. The biosynthesized Ag-NPs were stable after 3 months with no alteration in shape or size. M. purpureus showed no nitrate reductase activity, whereas its pigments reducing power was decreased after nanoparticles formation indicating its role in the Ag-NPs biosynthesis. The synthesized Ag-NPs exhibited strong antimicrobial activity against different bacteria and yeasts species. The anti-Candida activity of M. purpureus culture filtrate was enhanced in the presence of Ag-NPs; the maximum increase in microbial inhibition was observed against Candida albicans with 1.73 increased folds of inhibition zones, followed by their activity against C. tropicalis and C. glabrata with 0.919- and 0.694-folds of increase, respectively. The obtained results suggest that the biosynthesized Ag-NPs offers a promising cost-effective, eco-friendly, and an alternative way to the conventional method of synthesis that could have wide applications in medicine.
    Print ISSN: 0233-111X
    Electronic ISSN: 1521-4028
    Topics: Biology
    Published by Wiley-Blackwell
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  • 6
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    Prevalence of hypertension at high altitude: cross-sectional survey in Ladakh, Northern India 2007-2011 (2015)
    BMJ Publishing
    In: BMJ Open
    Details
    Publication Date: 2015-04-22
    Description: Objective Prevalence of hypertension was examined in a widely dispersed (45 110 km 2 ) representative group of Ladakhi in Northern India. The influence of hypoxic environment of wide-ranged altitude (2600–4900 m) and lifestyle change on hypertension was studied. Methods 2800 participants (age 20–94 years) were enrolled. Systolic blood pressure ≥140 mm Hg and/or diastolic blood pressure of ≥90 mm Hg and/or taking current anti-hypertensive medicine was defined as hypertension. Height and weight for body mass index and SpO 2 were examined. The rural population comprised six subdivisions with a distinct altitude, dietary and occupational pattern. Participants in the urban area of Leh consist of two groups, that is, migrants settled in Leh from the Changthang nomadic area, and dwellers born in Leh. The prevalence of hypertension in the two groups was compared with that in the farmers and nomads in rural areas. The effects of ageing, hypoxia, dwelling at high altitude, obesity, modernised occupation, dwelling in an urban area, and rural-to-urban migration to hypertension were analysed by multiple logistic regression. Results The prevalence of hypertension was 37.0% in all participants and highest in migrants settled in Leh (48.3%), followed by dwellers born in Leh town (41.1%) compared with those in rural areas (33.5). The prevalence of hypertension in nomads (all: 27.7%, Tibetan/Ladakhi: 19.7/31.9%)) living at higher altitude (4000–4900 m) was relatively low. The associated factors with hypertension were ageing, overweight, dwelling at higher altitude, engagement in modernised sedentary occupations, dwelling in urban areas, and rural-to-urban migration. The effects of lifestyle change and dwelling at high altitude were independently associated with hypertension by multivariate analysis adjusted with confounding factors. Conclusions Socioeconomic and cultural factors play a big role with the effect of high altitude itself on high prevalence of hypertension in highlanders in Ladakh.
    Keywords: Open access, Epidemiology, Public health
    Electronic ISSN: 2044-6055
    Topics: Medicine
    Published by BMJ Publishing
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  • 7
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    Preference-based disease-specific health-related quality of life instrument for glaucoma: a mixed methods study protocol (2016)
    BMJ Publishing
    In: BMJ Open
    Details
    Publication Date: 2016-11-10
    Description: Introduction A primary objective of healthcare services is to improve patients' health and health-related quality of life (HRQoL). Glaucoma, which affects a substantial proportion of the world population, has a significant detrimental impact on HRQoL. Although there are a number of glaucoma-specific questionnaires to measure HRQoL, none is preference-based which prevent them from being used in health economic evaluation. The proposed study is aimed to develop a preference-based instrument that is capable of capturing important effects specific to glaucoma and treatments on HRQoL and is scored based on the patients' preferences. Methods A sequential, exploratory mixed methods design will be used to guide the development and evaluation of the HRQoL instrument. The study consists of several stages to be implemented sequentially: item identification, item selection, validation and valuation. The instrument items will be identified and selected through a literature review and the conduct of a qualitative study. Validation will be conducted to establish psychometric properties of the instrument followed by a valuation exercise to derive utility scores for the health states described. Ethics and dissemination This study has been approved by the Trillium Health Partners Research Ethics Board (ID number 753). All personal information will be de-identified with the identification code kept in a secured location including the rest of the study data. Only qualified and study-related personnel will be allowed to access the data. The results of the study will be distributed widely through peer-reviewed journals, conferences and internal meetings.
    Keywords: Open access, Health economics, Health services research, Ophthalmology, Qualitative research
    Electronic ISSN: 2044-6055
    Topics: Medicine
    Published by BMJ Publishing
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  • 8
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    Mesenchymal stem cells therapy: a promising cell based therapy for treatment of myocardial infraction (2017)
    Wiley-Blackwell
    Details
    Publication Date: 2017-12-22
    Description: Aim: Mesenchymal stem (MSCs) cells have been used for cardiovascular diseases as regenerative therapy for decades. This review is an attempt to summarize the types of MSCs involved in MI therapy, its possible mechanisms effects especially paracrine one in MI focusing on the studies (human and animal) conducted in the last 10 years and the challenges that remain to be addressed. Discussion: Use of MSC transplantation after myocardial infarction (MI) has been found recently to have infarct-limiting effects in both experimental and clinical studies. In this context, various sources of MSCs have been identified which help in cardiac regeneration by either revitalizing the cardiac stem cells or revascularizing the arteries and veins of the heart. Furthermore, MSCs could produce paracrine growth factors that help increase the survivability of nearby cardiomyocytes as well as increase angiogenesis both by recruiting stem cell from bone marrow and by inducing vessel growth from existing capillaries. Conclusions: Although MSCs has achieved considerable admiration, some challenges still remain that need to be overcome in order to establish it as a successful technique. This article is protected by copyright. All rights reserved
    Electronic ISSN: 0091-7419
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Published by Wiley-Blackwell
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  • 9
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    Safety and feasibility evaluation of tourniquets for total knee replacement (SAFE-TKR): study protocol (2018)
    BMJ Publishing
    In: BMJ Open
    Details
    Publication Date: 2018-04-12
    Description: Introduction This study is designed to determine whether a full randomised controlled trial (RCT) examining the clinical effectiveness and safety of total knee replacement surgery with or without a tourniquet is warranted and feasible. Method and analysis Single centre, patient-blinded and assessor-blinded RCT. A computer-generated randomisation service will allocate 50 participants into one of two trial treatments, surgery with or without a tourniquet. The primary objective is to estimate recruitment, crossovers and follow-up of patients. All patients will have an MRI scan of their brain preoperatively and day 1 or 2 postoperatively to identify ischaemic cerebral emboli (primary clinical outcome). Oxford Cognitive Screen, Montreal Cognitive Assessment and Mini-Mental State Examination will be evaluated as outcome tools for measuring cognitive impairment at days 1, 2 and 7 postoperatively. Thigh pain, blood transfusion requirements, venous thromboembolism, revision surgery, surgical complications, mortality and Oxford knee and five-level EuroQol-5D scores will be collected over 12 months. Integrated qualitative research study : 30 trial patients and 20 knee surgeons will take part in semistructured interviews. Interviews will capture views regarding the pilot trial and explore barriers and potential solutions to a full trial. Multicentre cohort study : UK National Joint Registry data will be linked to Hospital Episode Statistics to estimate the relationship between tourniquet use and venous thromboembolic event, length of hospital stay, risk of revision surgery and death. The study will conclude with a multidisciplinary workshop to reach a consensus on whether a full trial is warranted and feasible. Ethics and dissemination National Research Ethics Committee (West Midlands-Edgbaston) approved this study on 27 January 2016 (15/WM/0455). The study is sponsored by University of Warwick and University Hospitals Coventry and Warwickshire. The results will be disseminated via high-impact peer-reviewed publication. Trial registration number ISRCTN20873088 ; Pre-results.
    Keywords: Open access, Surgery
    Electronic ISSN: 2044-6055
    Topics: Medicine
    Published by BMJ Publishing
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