452 research outputs found

    Withdrawal of antihypertensive medication: a systematic review

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    Although antihypertensive medication is usually continued indefinitely, observations during wash-out phases in hypertension trials have shown that withdrawal of antihypertensive medication might be well tolerated to do in a considerable proportion of people. A systematic review was completed to determine the proportion of people remaining normotensive for 6 months or longer after cessation of antihypertensive therapy and to investigate the safety of withdrawal. The mean proportion adjusted for sample size of people remaining below each study's threshold for hypertension treatment was 0.38 at 6 months [95% confidence interval (CI) 0.37–0.49; 912 participants], 0.40 at 1 year (95% CI 0.40–0.40; 2640 participants) and 0.26 at 2 years or longer (95% CI 0.26–0.27; 1262 participants). Monotherapy, lower blood pressure before withdrawal and body weight were reported as predictors for successful withdrawal. Adverse events were more common in those who withdrew but were minor and included headache, joint pain, palpitations, oedema and a general feeling of being unwell. Prescribers should consider offering patients with well controlled hypertension a trial of withdrawal of antihypertensive treatment with subsequent regular blood pressure monitoring

    A unified statistical model for S-N fatigue curves: probabilistic definition

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    In recent years, experimental tests exploring the gigacycle fatigue properties of materials suggest the introduction of modifications in well known statistical fatigue life models. Usual fatigue life models, characterized by a single failure mechanism and by the presence of the fatigue limit, have been integrated by models that can take into account the occurrence of two failure mechanisms and do not consider the presence of the fatigue limit. The general case, in which more than two failure mechanisms coexist with the fatigue limit, has not been proposed yet. The paper presents a unified statistical model which can take into account any number of failure mechanisms and the possible presence of the fatigue limit. The case of S-N curves with different fatigue life distributions coexisting for the entire stress range covered by fatigue tests is also considered. The adaptability of the statistical model to the S-N curves proposed in the open literature is demonstrated by qualitative numerical example

    Cellulolytic Bacteria in the foregut of the dromedary camel (Camelus dromedarius)

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    Foregut digesta from five feral dromedary camels were inoculated into three different enrichment media: cotton thread, filter paper, and neutral detergent fiber. A total of 283 16S rRNA gene sequences were assigned to 33 operational taxonomic units by using 99% species-level identity. LIBSHUFF revealed significant differences in the community composition across all three libraries

    HYPOGLYCEMIC AND LIPID LOWERING EFFECT OF AQUEOUS FRESH LEAF EXTRACT OF CHROMOLAENA ODORATA (LINN) IN ALBINO WISTAR RATS FED DIFFERENT CONCENTRATIONS OF CHOLESTEROL ENRICHED DIET

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    Objectives:  High lipids and carbohydrate have been seriously implicated to cardiovascular problems, which has led to several uses of medicinal plants for traditional remedies. The present study investigated the lipid lowering activity of fresh leaf extract of Chromolaena odorata in Albino wistar rats. Methods: Twenty (20) rats used for the study were grouped into four groups of five (5) rats each. Group I served as normal control, group II, III and IV served as test groups, fed 75, 108 and 148 g of cholesterol enriched diet for one week and thereafter, administered with 50, 100 and 150 mg/kg body weight of fresh leaf extract of Chromolaena odorata respectively for four (4) days. Lipid profile and blood glucose were assayed at fed state and after administration. Results showed a significant (p<0.05) increase in total cholesterol, triacylglycerol, low density lipoprotein, blood glucose concentration and body weight compared with control group in fed state.  Results: Administration with fresh leaf extract of Chromolaena odorata showed a significant (p<0.05) increase in high density lipoprotein, significant (p<0.05) decrease in blood glucose concentration, low density lipoproteins, triacylglycerol, total cholesterol and body weight of rats. The oral treatment with 50, 100 and 150 mg/kg body weight of the fresh leaf extract of this study demonstrated a general hypoglycemic and hypolipidemic activity not necessary a dose dependent pattern. Conclusion: It may therefore be concluded that the hypoglycemic and hypolipidemic activity of Chromolaena odorata taken freshly squeezed could be due to its phytochemical and antioxidants content.        Peer Review History: Received 24 February 2018;   Revised 3 March; Accepted 8 March, Available online 15 March 2018 UJPR follows the most transparent and toughest ‘Advanced OPEN peer review’ system. The identity of the authors and, reviewers will be known to each other. This transparent process will help to eradicate any possible malicious/purposeful interference by any person (publishing staff, reviewer, editor, author, etc) during peer review. As a result of this unique system, all reviewers will get their due recognition and respect, once their names are published in the papers. We expect that, by publishing peer review reports with published papers, will be helpful to many authors for drafting their article according to the specifications. Auhors will remove any error of their article and they will improve their article(s) according to the previous reports displayed with published article(s). The main purpose of it is ‘to improve the quality of a candidate manuscript’. Our reviewers check the ‘strength and weakness of a manuscript honestly’. There will increase in the perfection, and transparency. Received file:        Reviewer's Comments: Average Peer review marks at initial stage: 5.5/10 Average Peer review marks at publication stage: 7.5/10 Reviewer(s) detail: Dr. Adebayo Gege Grace Iyabo, University of Ibadan, Nigeria, [email protected] Prof. Dr. Ali Gamal Ahmed Al-kaf, Sana'a university, Yemen, [email protected] Similar Articles: ANTIDIABETIC AND ANTIHYPERLIPIDEMIC ACTIVITY OF DRACAENA CINNABARI BALF. RESIN ETHANOLIC EXTRACT OF SOQATRA ISLAND IN EXPERIMENTAL ANIMALS This article has been cited by: Ndife, Joel et al. “Development and comparative evaluation of green and black tisanes using scent leaves (Chromolaena odorata).” Journal of Food Science 3 (2019): 448-455. Pubme

    Isolation and characterization of the TIGA genes, whose transcripts are induced by growth arrest

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    We report here the isolation of 44 genes that are upregulated after serum starvation and/or contact inhibition. These genes have been termed TIGA, after Transcript Induced by Growth Arrest. We found that there are two kinds of G0 phases caused by serum starvation, namely, the shallow G0 (or G0/G1) and the deep G0 phases. The shallow G0 is induced by only a few hours of serum starvation, while deep G0 is generated after 3 days of serum starvation. We propose that mammalian cells enter deep G0 through a G0 gate, which is only opened on the third day of serum starvation. TIGA1, one of the uncharacterized TIGA genes, encodes a homolog of cyanate permease of bacteria and localizes in mitochondria. This suggests that Tiga1 is involved in the inorganic ion transport and metabolism needed to maintain the deep G0 phase. Ectopic expression of TIGA1 inhibited not only tumor cell proliferation but also anchorage-independent growth of cancer cell lines. A microsatellite marker, ENDL-1, allowed us to detect loss of heterozygosity around the TIGA1 gene region (5q21–22). Further analysis of the TIGA genes we have identified here may help us to better understand the mechanisms that regulate the G0 phase

    Context Factors and the Performance of Mobile Individuals in Research Teams

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    This article studies how workforce composition is related to a firm’s success in introducing radical innovations. Pre-vious studies have argued that teams composed of individuals with diverse backgrounds are able to perform moreinformation processing and make deeper use of the information, which is important to accomplish complex tasks.We suggest that this argument can be extended to the level of the aggregate workforce of high-technology firms. Inparticular, we argue that ethnic and higher education diversity within the workforce is associated with superior per-formance in radical innovation. Using a sample of 3,888 Swedish firms, this article demonstrates that having greaterworkforce diversity in terms of both ethnic background and educational disciplinary background is positively corre-lated to the share of a firm’s turnover generated by radical innovation. Having more external collaborations does,however, seem to reduce the importance of educational background diversity. The impact of ethnic diversity is notaffected by external collaboration. These findings hold after using alternative measures of dependent and indepen-dent variables, alternative sample sizes, and alternative estimation techniques. The research findings presented inthis article would seem to have immediate and important practical implications. They would suggest that companiesmay pursue recruitment policies inspired by greater ethnic and disciplinary diversity as a way to boost the innova-tiveness of the organ ization. From a managerial perspective, it may be conc luded tha t workforce disciplinary diver-sity could be potentially replaced by more external links, while ethnic diversity could not

    Exercise and cognitive function: a hypothesis for the association of type II diabetes mellitus and Alzheimer's disease from an evolutionary perspective

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    The association of type II diabetes mellitus (DM2) with Alzheimer's disease (AD) has received considerable attention in recent years. In the present paper, a hypothesis for this association from an evolutionary perspective, with emphasis on the close interplay between exercise and cognitive function, will be advanced in order to provide a biological rationale for the notion that the fundamental metabolic features of DM2 act in the brain over a protracted time span to induce the neuropathological characteristics of Alzheimer's disease thereby producing cognitive impairment. It is hoped that this hypothesis puts the association of DM2 and AD on firm conceptual grounds from a biological perspective and offers directions for further research
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