A colorimetric sensor based on 2,3-bis(6-chloropyridin-2-yl)-6-fluoroquinoxaline for naked-eye detection of Iron (III) and its application in real sample analysis.

Iron ions are crucial for numerous biological processes, and the levels of these ions have a significant impact on human well-being. Hence, it is essential to identify the level of Iron ions using a suitable technique. A new colorimetric sensor, namely "2,3-bis(6-chloropyridin-2-yl)-6-fluoroquinoxaline" (CF), has been introduced to detect Fe through naked-eye observation.

A multifunctional quinoxaline-based chemosensor for colorimetric detection of Fe and highly selective fluorescence turn-off response of Cu and their practical application.

A new dual responsive colorimetric and fluorescent turn-off sensor for Fe and Cu was designed and synthesized based on quinoxaline derivative by a simple procedure reaction. 2,3-bis(6-bromopyridin-2-yl)-6-methoxyquinoxaline (BMQ) was fabricated and characterized using ATR-IR, C and H NMR, and Mass spectroscopy. The interaction of BMQ with Fe caused a significant color change from colorless to yellow.

A revision of the genus Isotomurus (Collembola: Isotomidae) in northern Iran using molecular evidence.

Three new species of Isotomurus Börner are described from northern Iran. Status of studied populations is confirmed as new species by using COI and 28SrRNA markers. The new species belong to species-group characterized by 3,3,1 trichobothria on Abd.

How Tree Decline Varies the Anatomical Features in Quercus brantii.

Drought has serious effects on forests, especially semi-arid and arid forests, around the world. Zagros Forest in Iran has been severely affected by drought, which has led to the decline of the most common tree species, Persian oak (Quercus brantii). The objective of this study was to determine the effects of drought on the anatomical structure of Persian oak.

A Highly Sensitive and Selective Quinazoline-Based Colorimetric Probe for Naked-Eye Detection of Fe Ions.

A novel quinazoline-based colorimetric sensor (probe 1) that detected Fe via naked-eye in a buffered MeOH: HO (8:2) solvent system within a neutral pH range was synthesized and its structure was confirmed by H-NMR, C-NMR, FT-IR, and Mass spectroscopy. Its photophysical properties were also studied. The sensitivity and selectivity factor in the presence of 16 metal ions was examined by utilizing absorption titrations.

New Pseudachorutes species Tullberg, 1871 (Collembola, Neanuridae) with a key to Iranian species of the genus.

Two new species of the genus Pseudachorutes, namely P. hyrcanicus sp. nov.

Naked Eye Chemosensor and In Vivo Chelating Activity of Iron (III) By Bromopyridine Quinoxaline (BPQ).

A wide variety of medical, biomedical, and industrial applications has been reported for quinoxalines derivatives. In this work, a novel quinoxaline derivative was designed and synthesized. Naked-eye and quantitative detection of Fe among several cations were evaluated using UV-Vis spectroscopy.

New species and records of Neanurinae (Collembola: Neanuridae) from Mazandaran Province (Northeastern Iran), with a key to Iranian species of the subfamily.

Four new species of the subfamily Neanurinae, namely Cryptonura dohezarensis sp. nov., Cryptonura abmalensis sp.

Evaluation of Alterations in DNA Methylation of Gene Upstream Regulatory Elements in Gastric Cancer and in Response to Diazinon Treatment.

Background: Little is known about cytochrome P450 3A4 (CYP3A4) DNA methylation and transcription alterations in gastric cancer.

Objective: In this paper, we initially aimed to address the effect of diazinon pesticide on DNA methylation and transcription changes of the CYP3A4 gene in a human gastric cell line. In the next step, we studied the methylation differences of CpG sites within the upstream regulatory regions of the CYP3A4 gene among human gastric cancerous and healthy tissues.

Pyridine-2-yl Quinoxaline (2-CPQ) Derivative As a Novel Pink Fluorophore: Synthesis, and Chemiluminescence Characteristics.

Quinoxaline derivatives are well-known N-heterocycles with pharmacological and fluorescence activities. Almost all quinoxaline derivatives with extensive π-conjugation have been introduced as fluorophores which emit blue and green light. For the first time, we designed and synthesized 6-chloro-2,3 di(Pyridine-2yl) quinoxaline (2-CPQ) as a pink fluorophore in acetonitrile medium by simple route at room temperature whitin 30 min.

Fabrication and Characterization of Thymol-Loaded Chitosan Nanogels: Improved Antibacterial and Anti-Biofilm Activities with Negligible Cytotoxicity.

Thymol is a monoterpene phenolic derivative extracted from the Thymus vulgaris which has antimicrobial effects. In the present study, thymol-loaded chitosan nanogels were prepared and their physicochemical properties were characterized. The encapsulation efficiency of thymol into chitosan and its stability were determined.

Effects of cellulose nanofibrils and starch compared with polyacrylamide on fundamental properties of pulp and paper.

Bio-based additives received significant attention in pulp and paper properties improvement. For this, the most cited biochemical Cellulose Nano Fibrils (CNFs) and Cationic Starch (CS) were experimentally compared with the most declared synthetic chemical, Cationic Polyacrylamide (CPAM). SEM images showed better paper surface filling by the utilization of the chemicals.

Moderate overfeeding of different sources of metabolizable energy and protein. II: Effects on inflammatory status of sheep in late pregnancy and growth trajectory of the offspring.

Our objective was to evaluate the effects of moderate overfeeding of different sources of metabolizable energy (ME) and protein (MP) on inflammatory status of sheep in late gestation and short-term growth performance of the offspring. A total of 32 healthy pregnant Zell ewes (2.5 ± 1 years old, 42.

Green Synthesized Silver Nanoparticles Using Leaf Extract, Evaluation of Their Antibacterial, Anticancer and Antioxidant Activities.

Biogenic synthesis of silver nanoparticles (SNPs) has great attention of scientists, as it provides clean, biocompatible, non-toxic and inexpensive fabrication. In this study, leaf extract was used for synthesizing SNPs which reduces silver nitrate into silver zero-valent. SNPs were characterized by UV, FTIR, XRD, SEM-EDS, and TEM analysis.

Effect of Ink and Pretreatment Conditions on Bioethanol and Biomethane Yields from Waste Banknote Paper.

Waste banknote paper is a residue from the banking industry that cannot be recycled due to the presence of ink, microbial load and special coating that provides protection against humidity. As a result, waste banknote paper ends up being burned or buried, which brings environmental impacts, mainly caused by the presence of heavy metals in its composition. To minimize the environmental impacts that come from the disposal of waste banknote paper, this study proposes to produce value-added products (bioethanol and biogas) from waste banknote paper.

Moderate over-feeding of different sources of metabolizable energy and protein improved gestational insulin resistance markers and maternal metabolic status of sheep around lambing.

The objective of this study was to determine the effect of moderate over-nutrition of energy (using flaxseed as a source of n-3 fatty acids) and protein (using rumen-protected lysine and methionine) around parturition on prepartal insulin resistance (IR) and periparturient metabolic status and performance of ewes. For this purpose, 32 apparently healthy ewes (2.5 ± 1 years old, 42.

Biogenic Silver and Zero-Valent Iron Nanoparticles by Feijoa: Biosynthesis, Characterization, Cytotoxic, Antibacterial and Antioxidant Activities.

Background And Purpose: Green nanotechnology is an interesting method for the synthesis of functional nanoparticles. Because of their wide application, they have set up great attention in recent years.

Objective: The present research examines the green synthesis of Ag and zero-valent iron nanoparticles (AgNPs, ZVINPs) by Feijoa sellowiana fruit extract.

A study on the antioxidant and antimicrobial activities in the chloroformic and methanolic extracts of 6 important medicinal plants collected from North of Iran.

Background: As possible sources of natural bioactive molecules, the plant essential oils and extracts have been used globally in new antimicrobial compounds, food preservatives, and alternatives to treat infectious disease.

Methods: In this research, the antimicrobial activities of chloroformic and methanolic extracts of , , , , , and were evaluated against 8 bacteria (, , , , , , , ) and 3 fungi (, and ), through disc diffusion method. Furthermore, the essential oils of plants with the highest antibacterial activity were analyzed utilizing GC/MS.

An Updated Overview on Nanonutraceuticals: Focus on Nanoprebiotics and Nanoprobiotics.

Over the last few years, the application of nanotechnology to nutraceuticals has been rapidly growing due to its ability to enhance the bioavailability of the loaded active ingredients, resulting in improved therapeutic/nutraceutical outcomes. The focus of this work is nanoprebiotics and nanoprobiotics, terms which stand for the loading of a set of compounds (e.g.

Highly Concentrated Multifunctional Silver Nanoparticle Fabrication through Green Reduction of Silver Ions in Terms of Mechanics and Therapeutic Potentials.

Background: Green synthesis of silver nanoparticles (AgNPs) is limited to produce AgNPs with only relatively low concentrations, and is unsuitable for large-scale productions. The use of Myrtus communis (MC) leaf methanolic extract (rich in hydrolyzable tannins) has been recommended to resolve the issues related to the aggregation of nanoparticles at high concentrations of silver ions with added facet of antioxidant properties.

Methods: The produced highly concentrated MC-AgNPs were characterized by using imaging and spectroscopic methods.

Promoted reaction microextraction for determining pesticide residues in environmental water samples using gas chromatography-mass spectrometry.

A microextraction technique termed promoted reaction microextraction (PRME) based on a liquid-liquid microextraction was developed by applying a chemical reaction for promoting the extraction of the analytes into the extracting solvent. PRME is a very simple, rapid and high-performance method for extraction and pre-concentration of organic compounds from water samples. In PRME, different types of chemical reactions can be used.

Human health-related properties of chromones: an overview.

Natural compounds occurring throughout the world are scientifically and practically valuable because of their unique and beneficial properties to control a wide range of disorders in the human body. Chromones are attracting increasing attention as novel therapeutic agents due to their effective bioactivities for human health. Accordingly, the present overview article was designed to scan the biological and pharmacological performance of chromones, including their anti-inflammatory, anticancer, anti-oxidant, and anti-microbial activities.

Association of CYP1A1 M2 (A2455G) Polymorphism with Susceptibility to Breast Cancer in Mazandaran Province, Northern Iran: A Case-control Study.

Background: Breast cancer is one of the most frequent women malignancies in the world. The cytochrome P450 1A1 () is a key enzyme in xenobiotics metabolism. Moreover, CYP1A1 plays a critical role in the etiology of breast cancer by involving in 2-hydroxylation of estrogen.

Rice yield estimation based on forecasting the future condition of groundwater salinity in the Caspian coastal strip of Guilan Province, Iran.

Irrigation water salinity is one of the factors that reduces agricultural production. Guilan Province is one of the most important rice-producing areas in Iran where groundwater is used for irrigation. The temporal and spatial variations of groundwater salinity were studied in the coastal strip covering 4285 km of the province using data from 73 wells, as well as its estimated effect on the rice yield.