Research Publications (Food Safety)

Author(s): Xiaolin Wang, Shufan Wang, Fenghua Li, Renpeng Li, Jing Zhu, Jindong Chen, Wei Li, Dafeng Jiang

Author(s): Hassan Heidari, Samira Ghanbari-Rad, Esmaeil Habibi

Author(s): Maha Al-Naimi, Mohammad A. Al-Ghouti

In this study, a new covalent organic framework, consisting of tetra(4‐aminophenyl)porphyrin and tris(4‐formyl phenyl)amine, was layer‐by‐layer immobilized on stainless‐steel wire as a coating for microextraction. The fabrication process was easy and controllable under mild conditions. The as‐grown extracted fiber was applied to extract polycyclic aromatic hydrocarbons in aqueous solution via head‐space solid‐phase microextraction.

In food analysis, a trend towards on-site testing of quality and safety parameters is emerging. So far, on-site testing has been mainly explored by miniaturized optical spectroscopy and ligand-binding assay approaches such as lateral flow immunoassays and biosensors. However, for the analysis of multiple parameters at regulatory levels, mass spectrometry (MS) is the method of choice in food testing laboratories.

To the Editor—In a recent issue of Clinical Infectious Diseases, Faure-Bardon and colleagues report that maternal primary cytomegalovirus (CMV) infection is associated with adverse clinical outcomes for the fetus only when infections occur during the first trimester of pregnancy [1]. We laud their efforts to meticulously assess the timing of maternal primary infection.

United States dairy operations use antibiotics (primarily β-lactams and tetracyclines) to manage bacterial diseases in dairy cattle. Antibiotic residues, antibiotic-resistant bacteria (ARB), and antibiotic resistance genes (ARG) can be found in dairy manure and may contribute to the spread of antibiotic resistance (AR). Although β-lactam residues are rarely detected in dairy manure, tetracycline residues are common and perhaps persistent.

ICEpMERPH, the first integrative conjugative element (ICE) of the SXT/R391 familyisolated in the United Kingdom and Europe, was analyzed to determine the nature of its adaptivefunctions, its genetic structure, and its homology to related elements normally found in pathogenicVibrio or Proteus species. Whole genome sequencing of Escherichia coli (E. coli) isolate K802 (whichcontains the ICEpMERPH) was carried out using Illumina sequencing technology.

Author(s): Sihang Zhu, Jingjing Zhao, Nan Zhao, Xiao Yang, Chong Chen, Jianying Shang

The AOAC 2007.1 Quick, Easy, Cheap, Effective, Rugged and Safe official method, together with gas chromatography coupled to a triple quadrupole mass spectrometer was applied for the analysis of 38 multiclass pesticides from dried fruits typically cultivated and exported from Colombia: uchuva (Physalis peruviana), lulo (Solanum quitoense), guanabana (Anona muricata) and pitahaya (Hylocereus undatus).

Beauverolides (beauveriolides) are abundant biologically active cyclodepsipeptides produced by many entomopathogenic fungi, including those that are used as biopesticides. Beauverolides act as cholesterol acyltransferase inhibitors in humans; thus, their mode of action has been the subject of pharmacological and clinical research. The cost‐effective analytical methods are needed for fast, routine laboratory analysis of beauverolides.

Bovine serum albumin imprinted magnetic microspheres, with functional monomers of modified chitosan, N‐isopropylacrylamide and sulfobetaine methacrylate, were successfully prepared and characterized in detail. Computational analyses showed that during the preparation process, modified chitosan can effortlessly form multiple non‐covalent bonds with protein molecules. Temperature‐sensitive N‐isopropylacrylamide improves the elution efficiency by abating the mass transfer resistance.

Aminopeptidase N is an important metalloenzyme from the M1 zinc metallopeptidase family, which is present in numerous apicomplexan parasites, including Plasmodium, Eimeria, and Cryptosporidium. Aminopeptidase N is a potential drug target, and hence, its properties have been widely investigated. In the current study, the cellular localization and enzyme characteristics of Toxoplasma gondii aminopeptidase N3 (TgAPN3) were evaluated in vitro.

Effects of zinc (Zn) and lead (Pb) exposure on oxidative biomarkers and heat shock protein (HSP) expression, and their possible relation to ovarian steroidogenesis in fish were investigated. Female Cirrhinus cirrhosus were exposed to 1/10th of LC50 of metals for 30 days, and kept for another 30 days without metal exposure.

by David A. Groneberg, Stefan Rolle, Michael H. K. Bendels, Doris Klingelhöfer, Norman Schöffel, Jan Bauer, Dörthe Brüggmann

Author(s): Xi Chen, Danhong Wang, Jie Li, Taotao Xu, Keqiang Lai, Qi Ding, Hetong Lin, Lin Sun, Mengshi Lin

In this work, a graphene oxide-based composite (DABP-GO) was prepared by aminating graphene oxide (GO) with the diazonium salt of 4,4′-diaminobiphenyl (DABP). The DABP-GO composite was characterized by scanning electron microscopy, infrared spectroscopy, and nitrogen adsorption-desorption. The DABP-GO showed to be an effective solid-phase extraction (SPE) adsorbent for carbamate pesticides.

With increasing concern related to sustainable chemistry, we investigated the biosorption of Pb2+ ions from aqueous medium using an environmental friendly and economic biosorbent Bougainvillea spectabilis (BS). The BS was modified effectively using citric acid by hydrothermal method.

Author(s): Veronika Barišić, Ivana Flanjak, Ana Tot, Maja Budeč, Mirta Benšić, Antun Jozinović, Jurislav Babić, Drago Šubarić, Borislav Miličević, Đurđica Ačkar

Author(s): Jing Zhao, Zhaorui Meng, Zexin Zhao, Longshan Zhao

Author(s): Aya Iwabuchi, Nonoka Katte, Mizuki Suwa, Junya Goto, Hideyuki Inui

Selective removal of bisphenol A from wastewater is quite challenging primarily because of its low concentration and matrix complexity. To this end, according to the molecular structure of bisphenol A, we designed a functional monomer for the preparation of molecularly imprinted mesoporous silica using click chemistry reaction.

Background Fungicides are often applied to pears before kept in storage facilities. Scientific application of pesticides can reduce unnecessary exposure, which in turn could benefit both humans and the environment. Results We investigated dissipation behavior, residue distribution and conducted risk assessments for prochloraz, pyraclostrobin, and tebuconazole in pears stored under different conditions using ultra‐performance liquid chromatography.

BACKGROUND A new growing interest solvent named deep eutectic solvent has been prepared and used as an extraction solvent in the dispersive liquid–liquid microextraction method. In order to prepare the solvent, dichloroacetic acid, L–menthol, and n–butanol at a molar ratio of 4: 1: 1 are mixed and after heating the deep eutectic solvent is formed.