Trace metals in zooplankton from the northern Persian Gulf.

This work is the first study on the spatial and temporal distribution of metals in zooplankton collected along the Persian Gulf. The rank order distribution of metals in terms of their overall average concentration in the zooplankton was observed to be Fe > Zn > Cu > Cd > Ni > Cr > Pb > Co > V. No clear pattern and no statistical differences were detected among the areas and the sampling stations.

Bioavailability, mobility, and origination of metals in sediments from Anzali Wetland, Caspian Sea.

We investigated the bioavailability, mobility, and origin of heavy metals present in sediments from the Anzali Wetland. Chemical speciation of the metals was performed according to the Tessier method. Results indicated that Cd and As showed the highest level of bioavailability, whereas Cr showed the lowest level.

A new species of Cephaloecetes (Bubocorophiina) from the Iranian coasts of the Gulf of Oman and the Hormuz Strait (Crustacea: Amphipoda: Siphonoecetini).

The first member of Cephaloecetes in the north-western part of the Indian Ocean, Cephaloecetes ungulatus sp. nov., is described from Chabahar Bay, the Gulf of Oman and Qeshm Island in the western Hormuz Strait, Iran.

Data on diversity and abundance of zooplanktons along the northern part of the Persian Gulf, Iran.

In this data article, we aimed to evaluate and compare the biological diversity and relative abundance of zooplankton communities in 3 different areas along the northern part of the Persian Gulf in 3 different seasons. Data showed that and were the highest and lowest species among the groups identified in summer in Lavare Saheli and Nakhle Taghi with relative abundances of 87% and 2.7% respectively.

Effect of different levels of essential oils (Satureja hortensis) in diet on improvement growth, blood biochemical and immunity of Angelfish (Pterophyllum scalare Schultze, 1823).

The aim of this study was designed to analyse the effect of Savoury essential oil (Satureja hortensis) on growth performance, biochemical parameters and immunity of angelfish (Pterophyllum scalare). The angelfishes (average body weight of 5.12 ± 0.

Mapping of the corals around Hendorabi Island (Persian Gulf), using WorldView-2 standard imagery coupled with field observations.

High spatial resolution WorldView-2 (WV2) satellite imagery coupled with field observations have been utilized for mapping the coral reefs around Hendorabi Island in the northern Persian Gulf. In doing so, three standard multispectral bands (red, green, and blue) were selected to produce a classified map for benthic habitats. The in-situ observations were included photo-transects taken by snorkeling in water surface and manta tow technique.

Hydrochemistry and nutrient distribution in southern deep-water basin of the Caspian Sea.

In this work, the results of hydrochemical studies aboard the R/V Iran Behshahr in southern Caspian Sea in late-winter 2014 were presented. Salinity, temperature, dissolved oxygen, pH, total dissolved inorganic carbon, total alkalinity, nitrate, phosphate and silicate concentrations in water column of Neka-Amir Kabir oil platform section in the southern Caspian Sea were measured to study the status of hydrochemistry of this area. Results showed that the hypoxia continues to intensify in the deep-water basin of the South Caspian Sea.

Bioavailability and geochemical speciation of phosphorus in surface sediments of the Southern Caspian Sea.

The purpose of this study was to quantify phosphorus bioavailability and various forms of this element in surface sediments of the southern Caspian Sea. To do, sediment samples were collected from different depths in autumn 2015 using a Van Veen Grab. Phosphorus forms were recognized by a sequential extraction procedure (SEDEX).

Sediment-associated polycyclic aromatic hydrocarbons and potential eco-hazards in Chabahar Bay, Iran.

The surface sediments (0-4cm, n=6) from Chabahar Bay were analyzed to assess the concentrations, composition, and potential eco-hazards of associated PAHs. The range of ∑16 PAHs' concentration was 25.75-312.

Preconcentration and extraction of lead ions in vegetable and water samples by N-doped carbon quantum dot conjugated with FeO as a green and facial adsorbent.

Magnetically N-doped Carbon quantum dots has been synthesized via a simple chemical method and applied as a sorbent for the preconcentration and extraction of trace amounts of Pb from water and vegetable samples followed by flame atomic absorption spectrometric detection. The nanoparticles were characterized by X-ray diffraction, UV-vis spectra, Fourier transform infrared spectroscopy, vibrating sample magnetometer analysis and transmission electron microscopy. A central-composite design was used to find the optimum conditions for the preconcentration procedure through response surface methodology.

Preconcentration and determination of lead ions in fish and mollusk tissues by nanocomposite of FeO@graphene oxide@polyimide as a solid phase extraction sorbent.

The separation and pre-concentration of pb ions from mollusk and fish samples were performed by nanocomposite of magnetic graphene oxide-polyimide, as an efficient solid-phase extraction sorbent. The nanocomposite was characterized by field emission scanning electron microscopy, Fourier transform infrared spectroscopy and energy-dispersive X-ray spectroscopy. The parameters affecting the extraction processes including: amount of adsorbent, adsorption and desorption times, type and volume of the eluent solvent and interfering ions of the sample were investigated and optimized.

The protective role of vitamin E on Oreochromis niloticus exposed to ZnONP.

The present study evaluated if ZnONPs induce oxidative stress, immunological impairment and cellular damage in tilapia (Oreochromis niloticus), as well as the possible protective effect of vitamin E. Fish were fed for ten days and five study groups were investigated: controls, two ZnONPs concentrations (1.5 and 2.

Betamethasone-based chiral electrochemical sensor coupled to chemometric methods for determination of mandelic acid enantiomers.

A chiral biosensing platform was developed using betamethasone (BMZ) as chiral recognition element through multilayered electrochemical deposition of BMZ, overoxidized polypyrrole, and nanosheets of graphene (OPPy-BMZ/GR), for enantio-recognition of mandelic acid (MA) enantiomers. The deposited film was characterized by scanning electron microscopy, differential pulse voltammetry, cyclic voltammetry, and electrochemical impedance spectroscopy. It was shown that the chiral sensing platform can discriminate R- and S-MA differential pulse voltammetry signals, at the voltages of 1.

Evaluation of metal contamination in the Mand River delta, Persian Gulf.

Mand River is one of four permanent rivers flowing into the Persian Gulf. Intense industrial activities have significantly impacted its watershed and estuary. In order to evaluate metal contamination and their provenance nine sediment samples were taken from the Mand Delta.

Antioxidant response to metal pollution in Phragmites australis from Anzali wetland.

This research was conducted to examine variations of antioxidant enzyme activity in Phragmites australis as a biomarker for metals such as As, Pb, Cu, and Cd. Samples of sediment and plants were collected from 7 stations located in Anzali wetland. Biochemical parameters including Catalase, Peroxidase and Ascorbate Peroxidase activity were analyzed in the roots, stems and leaves of P.

Seed-mediated grown silver nanoparticles as a colorimetric sensor for detection of ascorbic acid.

A simple and sensitive approach was demonstrated for detection of ascorbic acid (AA) based on seed-mediated growth of silver nanoparticles (Ag NPs). According to the seeding strategy, silver ions existing in the growth solution were reduced to silver atoms on the surface of silver seeds via redox reaction between silver ions and AA. This process -led to appear an absorption band in near 420nm owing to the localized surface plasmon resonance peak of the generated Ag NPs.

Multisensor-integrated organs-on-chips platform for automated and continual in situ monitoring of organoid behaviors.

Organ-on-a-chip systems are miniaturized microfluidic 3D human tissue and organ models designed to recapitulate the important biological and physiological parameters of their in vivo counterparts. They have recently emerged as a viable platform for personalized medicine and drug screening. These in vitro models, featuring biomimetic compositions, architectures, and functions, are expected to replace the conventional planar, static cell cultures and bridge the gap between the currently used preclinical animal models and the human body.

, a new talitrid genus (Crustacea: Amphipoda: Talitridae) from Gulf of Oman, Iran.

A new genus and species, Persianorchestia nirvana gen. et sp. nov.

An integrated dual functional recognition/amplification bio-label for the one-step impedimetric detection of Micro-RNA-21.

Alteration in expression of miRNAs has been correlated with different cancer types, tumour stage and response to treatments. In this context, a structurally responsive oligonucleotide-based electrochemical impedimetric biosensor has been developed for the simple and sensitive detection of miRNA-21. A highly specific biotinylated DNA/LNA molecular beacon (MB) probe was conjugated with gold nanoparticles (AuNPs) to create an integrated, dual function bio-label (biotin-MB-AuNPs) for both biorecognition and signal generation.

Preliminary assessment of metal distribution in the surface sediments along the coastline of the southern Caspian Sea.

In the present study, the concentrations of metals in sediments along the coastline of the southern Caspian Sea were investigated. For this purpose, sediments were collected from 13 sampling sites in the southern Caspian Sea. The samples were then analyzed by inductively coupled plasma-optical emission spectrometry.

Electrospun biocompatible Chitosan/MIL-101 (Fe) composite nanofibers for solid-phase extraction of 9-tetrahydrocannabinol in whole blood samples using Box-Behnken experimental design.

The nanofibers of biocompatible Chitosan/MIL-101 (Fe) composite were synthesized by a simple, cheap and accessible electrospining method and applied for mat-based extraction of trace amount of Δ9-tetrahydrocannabinol (THC) from human whole blood sample following its combination by high performance liquid chromatography-ultraviolet detection. The composite nanofibres were characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, X-ray diffraction and N adsorption-desorption experiments. The volume of eluting solvent, sorbent amount, pH and% NaCl (w/v) influencing on the responses were investigated using factorial experimental design.

Polytetrafluoroethylene physisorption-assisted emulsification microextraction as a cleanup and preconcentration step in the gas chromatography determination of aliphatic hydrocarbons in marine sediment samples.

For the first time, the application of polytetrafluoroethylene powder as an extractant phase collector or holder in liquid-phase microextraction has been developed. For this purpose, the analytical performances of two different ways of applying polytetrafluoroethylene powder in microextraction methods including polytetrafluoroethylene physisorption-assisted emulsification microextraction and dispersive liquid-phase microextraction via polytetrafluoroethylene extractant phase holders have been compared for analysis of aliphatic hydrocarbons in aqueous phases. Under the same conditions, the former showed better extraction efficiencies over the latter and as a result, it was applied as preconcentration and cleanup step in the analysis of aliphatic hydrocarbons in sediment samples followed by gas chromatography analysis.

Geochemical speciation, bioavailability and source identification of selected metals in surface sediments of the Southern Caspian Sea.

Geochemical speciation of As, Cd, Co, Cr, Cu, Ni, Pb, V and Zn were determined in the surface sediments of the southern Caspian Sea. A five-step sequential extraction technique was used to determine the chemical forms of metals. Mean concentrations (ppm) of heavy metals were (mean±S.

Biodiesel production in crude oil contaminated environment using Chlorella vulgaris.

Biodiesel is a valuable alternative to fossil fuels and many countries choose biodiesel as an unconventional energy source. A large number of investigations have been done on microalgae as a source of oil production. In recent years, wastewater pollutions have caused many ecological problems, and therefore, wastewater phycoremediation has attracted the international attention.

Origin, toxicological and narcotic potential of sedimentary PAHs and remarkable even/odd n-alkane predominance in Bushehr Peninsula, the Persian Gulf.

Surface sediments (n=17) were collected from 6 sites located in the coasts of the Bushehr Peninsula. ∑PAH concentrations were in the range of 285.9-1288ngg dw and the sediments were moderately polluted.