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List of Articles
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Open Access Article
1 - Aflatoxin M1 Contamination in Milk and Milk Products in Iran: A Review
R. Kazemi Darsanaki M. Mohammad Doost Chakoosari M. Azizollahi AliabadiMycotoxins are secondary metabolites of molds and have adverse effects on humans, animals, and crops. Those can cause illnesses and economic losses. Aflatoxin M1 (AFM1) is one of the mycotoxins produced from the hydroxylated metabolite of aflatoxin B1 (AFB1). It can be MoreMycotoxins are secondary metabolites of molds and have adverse effects on humans, animals, and crops. Those can cause illnesses and economic losses. Aflatoxin M1 (AFM1) is one of the mycotoxins produced from the hydroxylated metabolite of aflatoxin B1 (AFB1). It can be found in milk or milk products obtained from livestock that have ingested contaminated feed. In this paper, recent studies were reviewed in aflatoxin M1 contamination in milk and milk products in Iran. Manuscript profile -
Open Access Article
2 - Silvernano Particle Loaded on Activated Carbon as Novel Adsorbent for the Removal of Acid Yellow 199 Dye
Z. Alishavandi N. Mosallanejad R. shabaniIn this study, a new adsorbent, silver nanoparticle loaded on activated carbon (Ag˗NP˗AC) was usedfor removal of acid yellow199 (AY 199) dye. This novel material was characterized and identified by differenttechniques such as Brunauer, Emmett and Teller (BET), field e MoreIn this study, a new adsorbent, silver nanoparticle loaded on activated carbon (Ag˗NP˗AC) was usedfor removal of acid yellow199 (AY 199) dye. This novel material was characterized and identified by differenttechniques such as Brunauer, Emmett and Teller (BET), field emission scanning electron microscopy(FESEM), X-ray diffraction (XRD) analysis. Unique properties of this adsorbent such as high surface area(>1100 m2g-1) and low pore size (<47 A˚) and average particle size lower than 60 A˚ make it possible forefficient removal of Ay199. In batch experimental set-up, adsorbent dosage, initial dye concentration, contacttime and pH were investigated. Optimum values were set as pH of 3.0, 0.03g/50mL of adsorbent for initial dyeconcentration of 15 mgL-1 at 40 min and 25 ±1 ºC. The adsorption of Ay199 follows the pseudo-second-orderrate equation in addition to interparticle diffusion model (with removal more than 90%) at all conditions.Equilibrium data fitted well with the Langmuir model, while maximum adsorption capacity was 30 mg g-1 for0.03 g/50mL of Ag˗NP˗AC. Calculation of various thermodynamic parameters such as, Gibb’s free energy,entropy and enthalpy of the on-going adsorption process also indicated feasibility and endothermic nature ofAY 199 adsorption onto Ag˗NP˗AC. Manuscript profile -
Open Access Article
3 - Investigation of the Possibility of Phytoremediating a Soil Contaminated with Anthracene
M. Ahmadi Z. T. Alipour A. Farrokhian FiruziPolycyclic Aromatic Hydrocarbons (PAHs) are one of the most important organic pollutantsfrequently found in the environment. In this experiment, the effect of phytoremediation as a cost effectivemethod was studied on the concentration of anthracene (C14H10) which is one MorePolycyclic Aromatic Hydrocarbons (PAHs) are one of the most important organic pollutantsfrequently found in the environment. In this experiment, the effect of phytoremediation as a cost effectivemethod was studied on the concentration of anthracene (C14H10) which is one of PAHs. The effect of sorghum(V1), hairy vetch (V2) and oat (V3) was studied under four concentrations of anthracene (S1, S2, S3 and S4) insoil. In S1 level which pollution was the lowest, the three plants had the highest reduction rate. The reductionrate was decreased by increasing the pollution level (S2 and S3),; the lowest reduction rate was observed in S4level which had the highest pollution level. There was significant difference between the three plants and thefallow. Generally, hairy vetch had the highest phytoremediating capacity and resistance compared with theother plants. Manuscript profile -
Open Access Article
4 - Ultra-Trace Determination of Copper and Silver in Environmental Samples by Using Ionic Liquid-Based Single Drop Microextraction-Electrothermal Atomic Absorption Spectrometry
J. Abolhasani M. Amjadi E. Ghorbani KalhorA sensitive, selective and effective ionic liquid-based single drop microextraction technique wasdeveloped by using ionic liquid, 1-hexyl-3-methylimidazolium hexafluorophosphate, C6MIMPF6, coupledwith electrothermal atomic absorption spectrometry (ETAAS) for the determi MoreA sensitive, selective and effective ionic liquid-based single drop microextraction technique wasdeveloped by using ionic liquid, 1-hexyl-3-methylimidazolium hexafluorophosphate, C6MIMPF6, coupledwith electrothermal atomic absorption spectrometry (ETAAS) for the determination of copper and silver inenvironmental samples. Dithizone was used as chelating agent. Several factors that influence themicroextraction efficiency and ETAAS signal, such as pH, dithizone concentration, extraction time, amounts ofionic liquid, stirring rate, pyrolysis and atomization temperature were investigated and the microextractionconditions were established. In the optimum experimental conditions, the detection limits (3 s) of the methodwere 4 and 8 ng L-1 and corresponding relative standard deviations (0.1 μg L-1, n = 6) were 4.2% and 4.8% forAg and Cu, respectively. The developed method was validated by analysis of a certified reference material andapplied to the determination of silver and copper. Manuscript profile -
Open Access Article
5 - Extraction and Determination of Pb(II) by Organic Functionalisation of Graphenes Adsorbed on Surfactant Coated C18 in Environmental Sample
A. Moghimi S. Yousefi SiahkalrodiA novel, simple, sensitive and effective method has been developed for preconcentration of lead. This solid-phase extraction adsorbent was synthesized by functionalization of graphenes with covalently linked N-methyl-glycine and 3, 4-dihydroxybenzaldehyde onto the surfa MoreA novel, simple, sensitive and effective method has been developed for preconcentration of lead. This solid-phase extraction adsorbent was synthesized by functionalization of graphenes with covalently linked N-methyl-glycine and 3, 4-dihydroxybenzaldehyde onto the surfaces of graphite. The method is based on selective chelation of Pb (II) on surfactant coated C18, modified with functionalization of graphenes (graphene-f-OH). The adsorbed ions were then eluted with 4 ml of 4 M nitric acid and determined by flame atomic absorption spectrometry (FAAS) at 283.3 for Pb. The influence of flow rates of sample and eluent solutions, pH, breakthrough volume, effect of foreign ions were investigated on chelation and recovery. 1.5 g of surfactant coated C18 adsorbs 40 mg of the functionalization of graphenes (graphene-f-OH) base which in turn can retain15.2±0.8mg of each of the two ions. The limit of detection (3σ) for Pb(II) was found to be 3.20 ng l -1. The enrichment factor for both ions is 100. The mentioned method was successfully applied on the determination of Pb in different water samples. Manuscript profile -
Open Access Article
6 - Antimicrobial and Barrier Properties of Bovine Gelatin Films Reinforced by Nano TiO2
R. Nassiri A. MohammadiNafchiThe effects of nano titanium dioxide incorporation were investigated on the water vaporpermeability, oxygen permeability, and antimicrobial properties of bovine gelatin films. The nano TiO2 (TiO2-N) was homogenized by sonication and incorporated into bovine gelatin solu MoreThe effects of nano titanium dioxide incorporation were investigated on the water vaporpermeability, oxygen permeability, and antimicrobial properties of bovine gelatin films. The nano TiO2 (TiO2-N) was homogenized by sonication and incorporated into bovine gelatin solutions at different concentrations(e.g. 1, 2, 3, and 5% w/w of dried gelatin). The permeability of the films to water vapor and oxygen wassignificantly decreased by incorporating of low concentration TiO2-N to gelatin solutions. TiO2-N gelatin filmsshowed an excellent antimicrobial activity against Staphylococcus aureus and Escherichia coli. Theseproperties suggest that TiO2-N has the potential as filler in gelatin-based films for using as an active packagingmaterials in pharmaceutical and food packaging industries. Manuscript profile -
Open Access Article
7 - Occurrence of Organochlorines Contaminants in Coastal Fish from Sepetiba Bay: Levels and Human Health Repercussions
A. Pacheco FerreiraThe aim of this study was to survey levels of polychlorinated biphenyls (PCBs), polychlorinateddibenzofurans (PCDFs), and polychlorinated dibenzo-p-dioxins (PCDDs) in white mullet (Mugil curema),common snook (Centropomus undecimalis), and acoupa weakfish (Cynoscion acou MoreThe aim of this study was to survey levels of polychlorinated biphenyls (PCBs), polychlorinateddibenzofurans (PCDFs), and polychlorinated dibenzo-p-dioxins (PCDDs) in white mullet (Mugil curema),common snook (Centropomus undecimalis), and acoupa weakfish (Cynoscion acoupa), collected at Sepetibabay, Rio de Janeiro, Brazil, March-August 2013. PCBs and PCDD/Fs were determined by High Resolution GasChromatography/High Resolution Mass Spectrometry (HRGC/HRMS) as stated by the US EPA 1613B, 1668B,and 8290A methods. The concentration of total PCBs ranged from 0.589688 ~ 0.6981629 pg-WHO-TEQ/g wwand PCDDs/PCDFs ranged from 0.134037 ~ 0.242573 pg-WHO-TEQ/g ww. The concentrations of thesecontaminants on fish species currently appear to fall below critical values, and the dietary consumption of thesespecies did not represent a risk for human health. However, seeking to avoid future problems, systematicmonitoring can prevent complications to the environment, marine wildlife and public health impacts. Manuscript profile -
Open Access Article
8 - Antimicrobial, Physicochemical, Mechanical, and Barrier Properties of Tapioca Starch Films Incorporated with Eucalyptus Extract
M. Rojhan L. NouriStarch is found in abundance in nature and it is one of the raw materials used for food packagingbecause of the low price, biodegradability, good mechanical and barrier properties. The recycling ability ofcoating materials was significantly increased by using edible fil MoreStarch is found in abundance in nature and it is one of the raw materials used for food packagingbecause of the low price, biodegradability, good mechanical and barrier properties. The recycling ability ofcoating materials was significantly increased by using edible films and coating in comparison to traditionalpackaging and it could be an alternative for synthetic films. In this research, the effect of eucalyptus extract(Aqueous Extract) was investigated on tapioca starch films. Tapioca starch films were prepared by castingmethod with addition of eucalyptus extract and a mixture of sorbitol/glycerol (weight ratio of 3 to 1) asplasticizers. Eucalyptus extract incorporated to the tapioca starch films were dried at different concentrations(0, 15, 25, and 35 of total solid) under controlled conditions. Physicochemical properties such as waterabsorption capacity (WAC), water vapor permeability (WVP) and mechanical properties of the films wereevaluated. Results showed that by increasing the concentration of eucalyptus extract, tensile strength wasincreased from 20.60 to 15.68 (MPa), also elongation was increased from 19.31 to 23.57 (%) at break andYoung’s modulus was decreased from 800.31 to 500.32 (MPa). Also incorporation of eucalyptus extract in thestructure of biopolymer increased permeability of water vapor of starch films. Tapioca starch filmsincorporated with eucalyptus extract exhibited excellent antimicrobial activity against E. Coli. In summary,eucalyptus extract improves functional properties of tapioca starch films and this types of films can be used infood packaging. Manuscript profile
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