Safety Checkpoints

partially_open9sìopenKazemipour, Alireza; Kleine-Ostmann, Thomas; Schrader, Thorsten; Allal, Djamel; Charles, Michael; Zilberti, Luca; Borsero, Michele; Bottauscio, Oriano; Chiampi, MarioKazemipour, Alireza; Kleine Ostmann, Thomas; Schrader, Thorsten; Allal, Djamel; Charles, Michael; Zilberti, Luca; Borsero, Michele; Bottauscio, Oriano; Chiampi, Mari

O-C Study of 545 Lunar Occultations from 13 Double Stars

International audienceIn this article, we have studied the reports of lunar occultations by this project observation's teams (named APTO) in comparison with other observations of the objects. Thirteen binary stars were selected for this study. All the previous observations of these stars were also collected. Finally, an analysis of O-C of all reports were performed

Determination of Aflatoxin M1 in Pasteurized Milk Consumed in Kerman Province

Abstract: Background & Aims: Aflatoxin M1 (AFM1) is a major metabolite of aflatoxin B1 detected in the milk of mammals that their foods have been contaminated with aflatoxins. Aflatoxins are a group of highly toxic metabolites produced by the common fungi Aspergillus flavus, A. parasiticus. They are among the most potent carcinogens found in foods. Considering its risk to the human health and high consumption of milk and diary products, this study was undertaken to determine the level of AFM1in pasteurized milk in Kerman province for the first time. Method: From 19 Dec. 2007 to 19 March 2008, a total of 76 pasteurized milk samples produced by eight factories were collected and checked for the level of AFM1 using immunoaffinity column and high-performance liquid chromatography coupled to fluorimetric detector. Results: The minimum detected level was 0.002 ppb and the amount of AFM1 in milk samples ranged from 0.002 to 0.14 ppb. No sample had greater AFM1 levels than the maximum allowed levels in milk accepted by FDA (o.5ppb), however, in 34 (44.7%) samples AFM1 level was over the maximum allowed limit in milk accepted by the European Union (0.05ppb). Mean AFM1 level in milk samples obtained from Jiroft factory was the least (0.019±0.01ppb) compared to that for other factories. Conclusion: Although the amount of AFM1 in samples selected from commonly consumed milks in Kerman province, does not appear to create a serious public health problem at present, because of high consumption of milk and diary products especially in children it is necessary to consider it as a serious health problem. Keywords: Milk, Aflatoxin M1, HPLC, Kerma

Optimization of dyeing wool fibers procedure with Isatis tinctoria by Response Surface Methodology

The response surface method (RMS) was used to optimize the color strength (K/S) of the wool fibers dyed with Isatis tinctoria. The eight independent variable terms, in which two of them are categorical and the other six numerical, were selected at two levels (low and high). The ANOVA test results of the linear model showed that the model terms, including reducing agent amount, dyeing temperature, dyeing time, and dyestuff percentage, have a significant effect on K/S. The actual values agreed with the predicted values and the suggested equation model was satisfactory and accurat

Ultrasonic assisted synthesis of a novel ternary nanocomposite based on carbon nanotubes/zeolitic imidazolate framework-67/polyaniline for solid-phase microextraction of organic pollutants

In the present research, a new nanoporous composite coating of polyaniline (PANI), modified multi-walled carbon nanotubes (MWCNTs), and zeolitic imidazolate frameworks (ZIF) was successfully fabricated by a layer-by-layer strategy through electrodeposition method on a stainless steel wire and ultrasonic-assisted. The optimization of the coating was done with design expert 10.0.7.0 software, while the crucial factors were optimized using a central composite design (CCD). The characteristics of the nanocomposite were examined by field emission-scanning electron microscopy (FE-SEM) and Fourier transform-infrared spectroscopy (FT-IR). The applicability of this home-made coating fiber was assessed for the headspace solid-phase microextraction (HS-SPME) of trace amounts of some organic pollutants in aqueous samples followed by gas chromatography-flame ionization detector (GC-FID). The significant parameters affecting the extraction efficiency, such as desorption and sorption conditions along with ionic strength, were also investigated. Validation experiments showed that the optimized method has wide linear ranges from 0.005 to 1000 μg L�1, very low limits of detection (0.0003�0.0008 μg L�1) and excellent repeatability (0.2�9.7). The relative recoveries obtained by spiking the target analytes in aqueous samples were in the range 83.4�111.2. The combination of modified CNTs, ZIF-67, and aniline in the nanocomposite create attractive opportunities for the development a new coating fiber with a porous structure, strong adhesion to the surface of the wire, excellent thermal stability, long lifespan and high extraction efficiency suggesting the potential of this SPME fiber for routine analysis in real samples. © 2020 Elsevier B.V