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https://www.readbyqxmd.com/read/28738605/rapid-one-pot-synthesis-of-mmta-protected-fluorescent-gold-nanoclusters-for-selective-and-sensitive-detection-of-ferric-ion
#1
Jingjing Jiang, Pengfei Gao, Yan Zhang, Guomei Zhang, Ying Zhou, Chuan Dong, Shaomin Shuang
Herein, we demonstrate a straightforward synthesis of fluorescent gold nanoclusters (AuNCs), employing 2-Mercapto-4-methyl-5-thiazoleacetic acid (MMTA) as a reducing and protecting agent by a rapid one-pot synthesis method with a short time of 20min. The as-synthesized MMTA-AuNCs exhibited bright blue emission with a strong peak centered at 430nm and the quantum yield (QY) was evaluated to be 4.0%. Based on the fluorescence quenching mechanism of a surface chelating reaction between MMTA and ferric ion (Fe(3+)), the MMTA-AuNCs were exploited as a fluorescence sensor for sensitive and selective detection of Fe(3+)...
November 1, 2017: Talanta
https://www.readbyqxmd.com/read/28737454/bioactivity-of-epigallocatechin-gallate-nanoemulsions-evaluated-in-mice-model
#2
Antonios E Koutelidakis, Konstantina Argyri, Zoi Sevastou, Dimitra Lamprinaki, Elli Panagopoulou, Evi Paximada, Aggeliki Sali, Vassilis Papalazarou, Athanasios Mallouchos, Vasiliki Evageliou, Vasiliki Kostourou, Ioanna Mantala, Maria Kapsokefalou
The hypothesis that incorporation of epigallocatechin gallate (EGCG) into nanoemulsions may increase its bioactivity compared with EGCG aqueous solutions was examined in mice. After an in vitro study in a model system with stimulated gastrointestinal conditions, the following EGCG nanoemulsions were used in a mice experiment: Emulsion I: emulsion water in oil (W/O), which contained 0.23 mg/mL EGCG in aqueous phase; Emulsion II: emulsion oil in water (O/W), which contained 10% olive oil and 0.23 mg/mL esterified EGCG in fatty phase; and Emulsion III: emulsion O/W in water (W1/O/W2; 8:32:60), which contained 32% olive oil and 0...
July 24, 2017: Journal of Medicinal Food
https://www.readbyqxmd.com/read/28737427/the-effect-of-different-dietary-levels-of-dl-methionine-and-dl-methionine-hydroxy-analogue-on-the-antioxidant-and-immune-status-of-young-turkeys
#3
Zenon Zduńczyk, Jan Jankowski, Magdalena Kubińska, Katarzyna Ognik, Anna Czech, Jerzy Juśkiewicz
The hypothesis postulating that the antioxidant and immunological effects of dietary methionine (Met) in young turkeys (1-8 weeks of age) can be differentiated by level and source of Met was investigated in this study. A total of 544 female Hybrid Converter turkeys were divided into four groups and fed diets in which Met content was tailored through supplementation with dl-methionine (dl-Met) or dl-methionine hydroxy analogue (MHA) to levels recommended by NRC (1994) (Groups dl-MetL and MHAL) and exceeding them by 50% (Groups dl-MetH and MHAH)...
July 24, 2017: Archives of Animal Nutrition
https://www.readbyqxmd.com/read/28732966/effect-of-ultrasonic-waves-on-the-water-turbidity-during-the-oxidation-of-phenol-formation-of-hydro-peroxo-complexes
#4
Natalia Villota, Jose M Lomas, Luis M Camarero
Analysis of the kinetics of aqueous phenol oxidation by a sono-Fenton process reveals that the via involving ortho-substituted intermediates prevails: catechol (25.0%), hydroquinone (7.7%) and resorcinol (0.6%). During the oxidation, water rapidly acquires color that reaches its maximum intensity at the maximum concentration of p-benzoquinone. Turbidity formation occurs at a slower rate. Oxidant dosage determines the nature of the intermediates, being trihydroxylated benzenes (pyrogallol, hydroxyhydroquinone) and muconic acid the main precursors causing turbidity...
November 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28730384/verifying-identities-of-plant-based-multivitamins-using-phytochemical-fingerprinting-in-combination-with-multiple-bioassays
#5
Yeni Lim, Yoon Hee Ahn, Jae Keun Yoo, Kyoung Sik Park, Oran Kwon
Sales of multivitamins have been growing rapidly and the concept of natural multivitamin, plant-based multivitamin, or both has been introduced in the market, leading consumers to anticipate additional health benefits from phytochemicals that accompany the vitamins. However, the lack of labeling requirements might lead to fraudulent claims. Therefore, the objective of this study was to develop a strategy to verify identity of plant-based multivitamins. Phytochemical fingerprinting was used to discriminate identities...
July 20, 2017: Plant Foods for Human Nutrition
https://www.readbyqxmd.com/read/28727441/adsorption-induced-changes-of-human-hemoglobin-on-ferric-pyrophosphate-nanoparticle-surface-probed-by-isotope-exchange-mass-spectrometry-an-implication-on-structure-function-correlation
#6
Bindu Y Srinivasu, Beena Bose, Gopa Mitra, Anura V Kurpad, Amit Kumar Mandal
In general, proteins in the biological system interact with nanoparticles (NPs) via adsorption on the particle surface. Understanding the adsorption at molecular level is crucial to explore NP-protein interactions. The increasing concerns about the risk to human health on NP exposure have been explored through the discovery of a handful protein biomarkers and biochemical analysis. However, detailed information on structural perturbation and associated functional changes of proteins on interaction with NPs is limited...
July 20, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28726714/performance-of-a-novel-recycling-magnetic-flocculation-membrane-filtration-process-for-tetracycline-polluted-surface-water-treatment
#7
Yufei Wang, Hui Jia, Hongwei Zhang, Jie Wang, Wenjin Liu
A recycling magnetic flocculation membrane filtration (RMFMF) process integrating circulating coagulation, magnetic enhanced flocculation and membrane filtration was investigated for the treatment of surface water micro-polluted by tetracycline, a typical pharmaceutical and personal care product. A bench-scale experiment was conducted and several water quality parameters including turbidity, ultraviolet absorbance at 254 nm (UV254), total organic carbon and tetracycline concentration were evaluated, taking coagulation membrane filtration and magnetic flocculation membrane filtration processes as reference treatments...
July 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28725621/chemical-composition-acute-toxicity-antioxidant-and-anti-inflammatory-activities-of-moroccan-tetraclinis-articulata-l
#8
Meryem El Jemli, Rabie Kamal, Ilias Marmouzi, Zouhra Doukkali, El Houcine Bouidida, Driss Touati, Rachid Nejjari, Lahcen El Guessabi, Yahia Cherrah, Katim Alaoui
Hydro-distilled essential oil (EO) from the leaves of the western Mediterranean and Moroccan endemic plant Tetraclinis articulata was analyzed by GC/MS and examined for its acute toxicity on mice, in order to establish the safe doses. Furthermore, the anti-Inflammatory activity was evaluated based on carrageenan and trauma induced rats paw edema and the antioxidant potential has been investigated using different methods including DPPH radical-scavenging assay, Trolox equivalent antioxidant capacity (TEAC) and Ferric-reducing antioxidant power assay (FRAP)...
July 2017: Journal of Traditional and Complementary Medicine
https://www.readbyqxmd.com/read/28725154/new-constituents-triterpene-ester-and-sugar-derivatives-from-panax-ginseng-meyer-and-their-evaluation-of-antioxidant-activities
#9
Ill-Min Chung, Nasir Ali Siddiqui, Seung Hyun Kim, Praveen Nagella, Azmat Ali Khan, Mohd Ali, Ateeque Ahmad
Panax ginseng C. A. Meyer (Araliaceae), is a well-known herb and used in the old established system of Oriental remedy, especially in Japan, China and Korea. Four new compounds characterized as (cis)- 7β,11α,19,21-tetra-O-decanoyl-18, 22β-dihydroxy-dammar-1-en-3-one (1), 3β,4α,12β-trihydroxystigmast-5-en-21-yl octadecan-9',12'-dienoate (2), dammar-12, 24-dien-3α, 6β, 15α-triol-3α-D-arabinopyranosyl-6β-L-arabinopyranoside (3) and dammar-24-en-3α, 6β, 16α, 20β-tetraol-3α-D-arabinopyranosyl-6β-D-arabinopyranoside (4) were isolated and established from the ethyl acetate and butanol extracts of the roots of P...
July 2017: Saudi Pharmaceutical Journal: SPJ: the Official Publication of the Saudi Pharmaceutical Society
https://www.readbyqxmd.com/read/28724214/potential-protective-effects-of-alpha-pinene-against-cytotoxicity-caused-by-aspirin-in-the-iec-6-cells
#10
Hafsia Bouzenna, Najla Hfaiedh, Marie-Agnès Giroux-Metges, Abdelfattah Elfeki, Hélène Talarmin
Alpha-pinene is a key compound of the essential oils extracted from many species of coniferous trees. It is known for its biological activities. The aim of the present study was to determine the preventive effect of alpha-pinene on aspirin-induced toxicity in vitro, using IEC-6 cells, and to investigate its antioxidant activities. The antioxidant activities were determined by 1,1-diphenyl-2-picrylhydrazyl (DPPH) and ferric reducing antioxidant power (FRAP). The cytotoxicity and oxidative stress were detected by cell viability, antioxidant enzyme activity, malondialdehyde (MDA) and GSH production, and the activation of MAPK pathways...
July 14, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28724166/iron-pharmacokinetics-in-women-with-iron-deficiency-anaemia-following-a-single-oral-dose-of-a-novel-formulation-of-tardyferon-prolonged-release-ferrous-sulphate
#11
Andrew Leary, Laurence Barthe, Thierry Clavel, Claudie Sanchez, Zahida Issiakhem, Bruno Paillard, Jean-Marc Edmond
Numerous iron-containing preparations are available on the market; these vary in dosage, salt, chemical state of iron (ferric or ferrous) and in the iron delivery process (immediate or prolonged-release). Tardyferon® is a prolonged-release tablet containing 80 mg ferrous sulphate. The formulation has recently been modified; changes to the excipients which constitute the inert formulation matrix have allowed a decrease in tablet size for easier swallowing. The aim of this multicenter open-label study was to characterize the serum pharmacokinetics of iron in non-pregnant women aged 23-45 years with iron deficiency anaemia (IDA) following single oral administration of 160 mg Tardyferon® under fasting conditions...
July 19, 2017: Drug Research
https://www.readbyqxmd.com/read/28722538/dispersed-synthesis-of-uniform-fe3o4-magnetic-nanoparticles-via-in-situ-decomposition-of-iron-precursor-along-cotton-fiber-for-sudan-dyes-analysis-in-food-samples
#12
Yassine Bentahir, Said Elmarhoum, Rachid Salghi, Manuel Algarra, Angel Ríos, Mohammed Zougagh
Fe3O4 magnetic nanoparticles, with a negative charge surface, are known to have efficient adsorbent properties, but they tend to be agglomerated into larger aggregates or flocs, which can cause loss of specific area. The addition of cotton fiber, as a stabilizer in preparation of the Fe3O4 nanoparticles, is able to efficiently reduce particle aggregation, and thus, effective particle size, resulting in much greater specific surface area and adsorption sites. Fe3O4 nanoparticles synthesis was accomplished by in-situ high temperature decomposition of the precursor ferric ion in the presence of cotton fiber and ethylene glycol solvent...
July 19, 2017: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/28722332/functionalized-acupuncture-needle-as-surface-enhanced-resonance-raman-spectroscopy-sensor-for-rapid-and-sensitive-detection-of-dopamine-in-serum-and-cerebrospinal-fluid
#13
Liangbao Yang, Pan Li, Binbin Zhou, Xiaomin Cao, Xianghu Tang, Ling Hu, Jinhuai Liu
It is challenging to develop a robust sensor for simple and rapid operation and sensitive detection of neurotransmitter in complex specimen. In the present work, the ferric-citrate-functionalized Au nanoparticles [Au NPs/CA-Fe(III)] is utilized to develop a facile sensor based on Surface-enhanced Resonance Raman spectroscopy (SERRS) for sensitive detection of dopamine (DA). The sensor is prepared by decorating acupuncture needle with Au NPs, which enables the sufficient SERS enhancement. CA-Fe(III) structure was highly sensitive and selective to DA with formation of CA-Fe(III)-DA resonant structure, indicating the advantages of capturing, carrying and separating DA molecules from complicated samples with simple operation...
July 19, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28721088/forced-exercise-attenuates-neuropathic-pain-in-chronic-constriction-injury-of-male-rat-an-investigation-of-oxidative-stress-and-inflammation
#14
Hossein Ali Safakhah, Nasroallah Moradi Kor, Atiyeh Bazargani, Ahmad Reza Bandegi, Hamid Gholami Pourbadie, Baharak Khoshkholgh-Sima, Ali Ghanbari
BACKGROUND AND OBJECTIVE: Initial peripheral/central nerve injuries, such as chronic constriction injury (CCI)/spinal cord injury, are often compounded by secondary mechanisms, including inflammation and oxidative stress, which may lead to chronic neuropathic pain characterized by hyperalgesia or allodynia. On the other hand, exercise as a behavioral and non-pharmacological treatment has been shown to alleviate chronic neuropathic pain. Therefore, this study was conducted to examine whether or not exercise reduces neuropathic pain through modifying oxidative stress and inflammation in chronic constriction injury of the sciatic nerve...
2017: Journal of Pain Research
https://www.readbyqxmd.com/read/28720134/in-vitro-antioxidant-and-antimalarial-activities-of-leaves-pods-and-bark-extracts-of-acacia-nilotica-l-del
#15
Muhammad Bilal Sadiq, Pattamon Tharaphan, Kesinee Chotivanich, Joel Tarning, Anil Kumar Anal
BACKGROUND: The emergence of drug resistant malaria is threatening our ability to treat and control malaria in the Southeast Asian region. There is an urgent need to develop novel and chemically diverse antimalarial drugs. This study aimed at evaluating the antimalarial and antioxidant potentials of Acacia nilotica plant extracts. METHODS: The antioxidant activities of leaves, pods and bark extracts were determined by standard antioxidant assays; reducing power capacity, % lipid peroxidation inhibition and ferric reducing antioxidant power assay...
July 18, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/28718067/theoretical-and-experimental-in-vivo-study-of-antioxidant-activity-of-crocin-in-order-to-propose-novel-derivatives-with-higher-antioxidant-activity-and-their-delivery-via-nanotubes-and-nanocones
#16
Houshang Najafi, Zeynab Mohamadi Yarijani, Meysam Najafi
In this study, the antioxidant activity of crocin via experimental and theoretical methods was investigated. In order to induce oxidative stress, 30-min renal ischemia and 24-h reperfusion were used in male Wistar rats. Oxidative stress was assessed by measuring tissue malondialdehyde (MDA) and ferric reducing/antioxidant power (FRAP). The results showed that following ischemia/reperfusion, the level of MDA was increased and FRAP decreased. Both of these changes were alleviated by crocin administration. The bond dissociation enthalpy and ionization potential values as enthalpies of mechanism of antioxidant activity of crocin were calculated by density functional theory method...
July 17, 2017: Inflammation
https://www.readbyqxmd.com/read/28717590/construction-of-a-fur-null-mutant-and-rna-sequencing-provide-deeper-global-understanding-of-the-aliivibrio-salmonicida-fur-regulon
#17
Sunniva Katharina Thode, Cecilie Bækkedal, Jenny Johansson Söderberg, Erik Hjerde, Hilde Hansen, Peik Haugen
BACKGROUND: The ferric uptake regulator (Fur) is a transcription factor and the main regulator of iron acquisition in prokaryotes. When bound to ferric iron, Fur recognizes its DNA binding site and generally executes its function by repressing transcription of its target genes. Due to its importance in virulence, the Fur regulon is well studied for several model bacteria. In our previous work, we used computational predictions and microarray to gain insights into Fur-regulation in Aliivibrio salmonicida, and have identified a number of genes and operons that appear to be under direct control of Fur...
2017: PeerJ
https://www.readbyqxmd.com/read/28716864/alpha1-antitrypsin-binds-hemin-and-prevents-oxidative-activation-of-human-neutrophils-putative-pathophysiological-significance
#18
Sabina Janciauskiene, Srinu Tumpara, Malgorzata Wiese, Sabine Wrenger, Vijith Vijayan, Faikah Gueler, Rongjun Chen, Kukuh Madyaningrana, Ravi Mahadeva, Tobias Welte, Stephan Immenschuh, Joanna Chorostowska-Wynimko
Heme is a ubiquitous compound of human tissues, and it is involved in cellular physiology and metabolism. Once released from the cell, free heme oxidizes to the ferric state (hemin). High levels of hemin can cause oxidative stress and inflammation if not neutralized immediately by specialized scavenger proteins. Human alpha1-antitrypsin (A1AT), an acute-phase glycoprotein and important inhibitor of neutrophil proteases, is also a hemin-binding protein. A short-term exposure of freshly isolated human blood neutrophils to 4 µM hemin results in cell spreading, surface expression of filament protein, vimentin, free radical production, expression of heme oxygenase-1 (HO-1), release of IL-8, and enhanced neutrophil adhesion to human endothelial cells...
July 17, 2017: Journal of Leukocyte Biology
https://www.readbyqxmd.com/read/28715761/effects-of-lead-mineralogy-on-soil-washing-enhanced-by-ferric-salts-as-extracting-and-oxidizing-agents
#19
Jong-Chan Yoo, Sang-Min Park, Geun-Seok Yoon, Daniel C W Tsang, Kitae Baek
In this study, we evaluated the feasibility of using ferric salts including FeCl3 and Fe(NO3)3 as extracting and oxidizing agents for a soil washing process to remediate Pb-contaminated soils. We treated various Pb minerals including PbO, PbCO3, Pb3(CO3)2(OH)2, PbSO4, PbS, and Pb5(PO4)3(OH) using ferric salts, and compared our results with those obtained using common washing agents of HCl, HNO3, disodium-ethylenediaminetetra-acetic acid (Na2-EDTA), and citric acid. The use of 50 mM Fe(NO3)3 extracted significantly more Pb (above 96% extraction) from Pb minerals except PbSO4 (below 55% extraction) compared to the other washing agents...
July 12, 2017: Chemosphere
https://www.readbyqxmd.com/read/28715687/highly-selective-and-sensitive-fluorogenic-ferric-probes-based-on-aggregation-enhanced-emission-with-sime3-substituted-polybenzene
#20
Xuefeng Wang, Hua Wang, Qin Jiang, Yong-Ill Lee, Shengyu Feng, Hong-Guo Liu
In this study, thiophene was linked to polybenzene to generate novel fluorescent probes, namely 3,4-diphenyl-2,5-di(2-thienyl)phenyl-trimethylsilane (DPTB-TMS) with a -SiMe3 substituent and 3,4-diphenyl-2,5-di(2-thienyl)phenyl (DPTB) without the -SiMe3 substituent, respectively. Both of the two compounds exhibit aggregation-enhanced emission (AEE) properties in tetrahydrofuran/water mixtures due to restricted intramolecular rotation of the peripheral groups, which make the two compounds good candidates for the detection of Fe(3+) ions in aqueous-based solutions...
July 13, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
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