Revisiting the ABC flow dynamo

The ABC flow is a prototype for fast dynamo action, essential to the origin of magnetic field in large astrophysical objects. Probably the most studied configuration is the classical 1:1:1 flow. We investigate its dynamo properties varying the magnetic Reynolds number Rm. We identify two kinks in the growth rate, which correspond respectively to an eigenvalue crossing and to an eigenvalue coalescence. The dominant eigenvalue becomes purely real for a finite value of the control parameter. Finally we show that even for Rm = 25000, the dominant eigenvalue has not yet reached an asymptotic behaviour. Its still varies very significantly with the controlling parameter. Even at these very large values of Rm the fast dynamo property of this flow cannot yet be established

Qualitative Study to Assess Plastic Packaging Materials in Gezira State, Sudan

This study was conducted to assess the quality and safe descriptions of the commercial plastic packaging materials produced in Sudan, which are used for filling, preserving and packaging foodstuffs. A total of 144 plastic samples were collected randomly from a local market in Wad-Medan town, central Sudan. Some of the physical properties of plastic samples were determined. The results shown that overall mean values of thickness ranged between 60.7±7.6 µm and density between 0.084 ± 0.044 mg/cm³ is higher and lower, respectively, when compared with those of plastic packaging materials manufactured in Sudan. In addition, the descriptions of the commercial plastic packaging materials have not been labeled with symbol code numbers and safety symbol as recommended for plastic materials and articles manufactured in the European Union and United States of American countries

Attitude and practice regarding breast cancer early detection among Iranian women: A systematic review

Objectives: To determining attitudes and practice regarding breast cancer early detection techniques (breast self-examination (BSE), clinical breast examination (CBE) and mammography) among Iranian woman. Methods: International (PubMed, ISI, and Google Scholar) and national (SID and Magiran) databases were reviewed up to September 2017 to identify articles related to the attitudes and practices of Iranian women concerning breast cancer screening behavior with reference to BSE, CBE and mammography. The screening steps, analysis of quality of the studies and extraction of the papers were performed by two reviewers. Results: Of the 532 studies included initially, 21 performed on 10,521 people were considered eligible. Subjects with a positive attitude toward BSE in various studies were 13.5 to 94.0 with an average of 47.6. Positive attitudes to CBE and mammography were found in 21.0 and 26.4, respectively. Participant performance of BSE ranged from 2.6 to 84.7, with an average of 21.9. The respective figures for CBE and mammography were 15.8 and 16.7. Conclusion: Considering the poor performance and low rates for positive attitudes, it is suggested that educational programs should be conducted across the country

Disappearance of Azoxystrobin and difenoconazole in green beans cultivated in Souss Massa valley (Morocco)

A study was undertaken to evaluate the degradation behavior and residue levels of azoxystrobin and difenoconazole in Belma green beans variety grown in an experimental plastic greenhouse. The measurements were made over a 3 week period in which up to two successive treatments with azoxystrobin and a 5 week period in which up to two successive treatments with difenoconazole were carried out. Residue levels of dicofol and difenoconazole were determined by Gas chromatography with electron capture detection (GC-ECD), liquid-liquid extraction (LLE), solid phase extraction (SPE) and high-performance liquid chromatography (HPLC). During the study, residue levels in the plantation ranged between 0.35 and 0.01 mg/kg for azoxystrobin and between 0.25 and 0.01 mg/kg for difenoconazole. The residual concentrations after the preharvest intervals (PHI) were below the legal limits

Prevalence of gestational diabetes mellitus in Eastern Mediterranean region: a systematic review and meta-analysis

Purpose: Gestational diabetes mellitus (GDM) is one of the costly challenges in the health field. Despite the individual studies in the Eastern Mediterranean, there is no comprehensive study in this regard. The aim of this study was to determine the prevalence of GDM in the Eastern Mediterranean region. Methods: In this meta-analysis and systematic review, three international databases (PubMed, Web of science and Scopus) were searched from inception until 30 December 2018. The Hui tool was used to assess the quality of the included studies. Results: Thirty-three studies performed on 887166 participants were included in the meta-analysis. Based on the results of random effect method, the overall prevalence of GDM was 11.7%. Between six country with have three or more study, pooled prevalence for Saudi Arabi it was 3.6 times more than Israel (17.6 vs. 4.9%), and for Pakistan, Qatar, Bahrain and Iran were 15.3%, 14.7%, 12.2%, and 8.6%, respectively. Conclusion: Despite the high diversity of methods, the results of the present study indicate a high prevalence of GDM in the Eastern Mediterranean region, indicating more policymakers’ interest in timely screening and proper management