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https://www.readbyqxmd.com/read/28226248/the-impact-of-pre-oxidation-with-potassium-permanganate-on-cyanobacterial-organic-matter-removal-by-coagulation
#1
Jana Naceradska, Martin Pivokonsky, Lenka Pivokonska, Magdalena Baresova, Rita K Henderson, Arash Zamyadi, Vaclav Janda
The study investigates the effect of permanganate pre-oxidation on the coagulation of peptides/proteins of Microcystis aeruginosa which comprise a major proportion of the organic matter during cyanobacterial bloom decay. Four different permanganate dosages (0.1, 0.2, 0.4 and 0.6 mg KMnO4 mg(-1) DOC) were applied prior to coagulation by ferric sulphate. Moreover, changes in sample characteristics, such as UV254, DOC content and molecular weight distribution, after pre-oxidation were monitored. The results showed that permanganate pre-oxidation led to a reduction in coagulant dose, increased organic matter removals by coagulation (by 5-12% depending on permanganate dose), microcystin removal (with reductions of 91-96%) and a shift of the optimum pH range from 4...
February 14, 2017: Water Research
https://www.readbyqxmd.com/read/28226182/effect-of-different-solvents-on-the-measurement-of-phenolics-and-the-antioxidant-activity-of-mulberry-morus-atropurpurea-roxb-with-accelerated-solvent-extraction
#2
Jiufang Yang, XiaoQun Ou, Xiaoxu Zhang, ZiYing Zhou, LiYan Ma
The effects of 9 different solvents on the measurement of the total phenolics and antioxidant activities of mulberry fruits were studied using accelerated solvent extraction (ASE). Sixteen to 22 types of phenolics (flavonols, flavan-3-ols, flavanol, hydroxycinnamic acids, hydroxybenzoic acids, and stilbenes) from different mulberry extracts were characterized and quantified using HPLC-MS/MS. The principal component analysis (PCA) was used to determine the suitable solvents to distinguish between different classes of phenolics...
February 22, 2017: Journal of Food Science
https://www.readbyqxmd.com/read/28221703/multiblock-copolymer-based-dual-dynamic-disulfide-and-supramolecular-crosslinked-self-healing-networks
#3
So Young An, Seung Man Noh, Jung Kwon Oh
A new multiblock copolymer self-healing strategy is reported that centers on the synthesis of block copolymers designed with different self-healing motifs incorporated into individual blocks. As a proof of concept, a novel pentablock copolymer (ABCBA) consisting of a poly(ethylene glycol) middle block and self-healable symmetric blocks of a polymethacrylate with pendant disulfide linkages and carboxylic acids is synthesized by a combination of consecutive controlled radical polymerization with hydrolytic cleavage...
February 21, 2017: Macromolecular Rapid Communications
https://www.readbyqxmd.com/read/28220853/successive-extraction-of-as-v-cu-ii-and-p-v-ions-from-water-using-spent-coffee-powder-as-renewable-bioadsorbents
#4
Linlin Hao, Peng Wang, Suresh Valiyaveettil
For the first time, renewable and easy accessible pre-bleached spent coffee powder coated with polyethylenimine (PEI) and ferric ions (Coffee-PEI-Fe) was used for the successive adsorption of As(V), Cu(II) and P(V) ions from spiked water samples. Fully characterized coffee-PEI-Fe was employed for batch mode experiments. Kinetic regression analysis showed that the adsorption processes of As(V) and P(V) anions follows a pseudo-second-order model, while the adsorption of Cu(II) ions fit with a pseudo-first-order model...
February 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28219296/phytochemical-screening-and-evaluation-of-in-vitro-antioxidant-and-antimicrobial-activities-of-the-indigenous-medicinal-plant-albizia-odoratissima
#5
Venkanna Banothu, Chandrasekharnath Neelagiri, Uma Adepally, Jayalakshmi Lingam, Kesavaharshini Bommareddy
CONTEXT: Albizia odoratissima (L. f.) Benth has been used in Indian folk medicine to treat numerous inflammatory pathologies, such as leprosy, ulcers, burns and asthma. OBJECTIVE: To evaluate the antioxidant and antimicrobial properties of A. odoratissima. MATERIALS AND METHODS: Dried leaves of A. odoratissima were extracted in organic solvents (hexane, chloroform, ethyl acetate, and methanol). The total phenolic content (TPC) and total flavonoid content (TFC) were determined using the Folin-Ciocalteu and aluminum chloride colorimetric methods, respectively...
December 2017: Pharmaceutical Biology
https://www.readbyqxmd.com/read/28218506/enhanced-electrochemical-performance-of-layered-lithium-rich-cathode-materials-by-constructing-spinel-structure-skin-and-ferric-oxide-islands
#6
Shi Chen, Yu Zheng, Yun Lu, Yuefeng Su, Liying Bao, Ning Li, Yitong Li, Jing Wang, Renjie Chen, Feng Wu
Layered lithium-rich cathode materials have been considered as competitive candidates for advanced lithium-ion batteries, due to their merits in high capacity (more than 250 mAh·g-1), low cost and environmental benignity. However, they still surfer from poor rate capability and modest cycling performance. To address these issues, we have proposed and constructed a spinel-structure skin and ferric oxide islands on the surface of layered lithium-rich cathode materials through a facile wet chemical method. During the surface modification, Li ions in the surface area of pristine particles could be partially extracted by H+, along with the depositing process of ferric hydrogen...
February 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28216890/evaluate-the-antigenotoxicity-and-anticancer-role-of-%C3%AE-sitosterol-by-determining-oxidative-dna-damage-and-the-expression-of-phosphorylated-mitogen-activated-protein-kinases-c-fos-c-jun-and-endothelial-growth-factor-receptor
#7
Ramalingam Sharmila, Ganapathy Sindhu
BACKGROUND: Plant sterols are the major source of micronutrients and have not shown any obvious side effects in human. β-sitosterol is one of the most prevalent phytosterols which have been recorded in ancient medicinal history for its use in the treatment of many chronic diseases, especially cancer. The modulations of mitogen-activated protein kinases' (MAPKs') play a crucial role in the development of human renal cell carcinoma. OBJECTIVE: The aim of the current study is to evaluate the antigenotoxic and anticancer role of β-sitosterol against renal carcinogen...
January 2017: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/28216591/iron-supply-affects-anthocyanin-content-and-related-gene-expression-in-berries-of-vitis-vinifera-cv-cabernet-sauvignon
#8
Pengbao Shi, Bing Li, Haiju Chen, Changzheng Song, Jiangfei Meng, Zhumei Xi, Zhenwen Zhang
Anthocyanins are important compounds for red grape and red wine quality, and can be influenced by supply of nutrients such as nitrogen, phosphorus, potassium, zinc, and iron. The present work aims to gain a better understanding of the effect of iron supply on anthocyanins concentration in grape berries. To this end, own-rooted four-year-old Cabernet Sauvignon grapevines (Vitis vinifera) were fertigated every three days with 0, 23, 46, 92, and 184 μM iron (Fe) from ferric ethylenediamine di (o-hydroxyphenylacetic) acid (Fe-EDDHA) in a complete nutrient solution...
February 14, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28214348/organo-protective-and-antioxidant-properties-of-leaf-extracts-of-syzygium-guineense-var-macrocarpum-against-ferric-nitriloacetate-induced-stress-of-wistar-rats
#9
Francine Tankeu Nzufo, Constant Anatole Pieme, Jacques Romain Njimou, Prosper Cabral Biapa Nya, Bruno Moukette Moukette, Bravi Marco, Chianese Angelo, Ngogang Jeanne Yonkeu
Background The present study focused on the antioxidant, phenolic profile and free radical scavenging-mediated protective effect of leaves extracts of Syzygium guineense var. macrocarpum against ferric nitriloacetate-induced stress in the liver, heart, kidney and brain tissues of Wistar rats homogenates. Methods Spectrophotometric standardized methods were used to determine the free radical scavenging potential, antioxidant and protective properties of plant extracts on rat homogenates. Results All the extracts showed a concentration-dependent free radical quenching potential, and the ability to protect all the tested organs by inhibiting the lipid peroxidation and potentiating or restoring the activity of enzymatic and non enzymatic markers...
February 16, 2017: Journal of Complementary & Integrative Medicine
https://www.readbyqxmd.com/read/28213526/structural-and-mechanistic-insights-into-hemoglobin-catalyzed-hydrogen-sulfide-oxidation-and-the-fate-of-polysulfide-products
#10
Victor Vitvitsky, Pramod K Yadav, Sojin An, Javier Seravalli, Uhn-Soo Cho, Ruma Banerjee
Hydrogen sulfide is a cardioprotective signaling molecule but is toxic at elevated concentrations. Red blood cells can synthesize H2S but lacking organelles, cannot dispose off H2S via the mitochondrial sulfide oxidation pathway. We have recently shown that at high sulfide concentrations, ferric hemoglobin oxidizes H2S to a mixture of thiosulfate and iron-bound polysulfides in which the latter species predominates. Here, we report the crystal structure of human hemoglobin containing low-spin ferric sulfide, the first intermediate in heme-catalyzed sulfide oxidation...
February 17, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28213246/spinel-type-manganese-ferrite-mnfe2o4-microspheres-a-novel-affinity-probe-for-selective-and-fast-enrichment-of-phosphopeptides
#11
Xing-Yu Long, Jia-Yuan Li, Dong Sheng, Hong-Zhen Lian
The spinel-type magnetic manganese ferrite (MnFe2O4) microspheres synthesized by simple solvothermal method were used as a novel adsorbent for selective enrichment and effective isolation of phosphopeptides. The uniform MnFe2O4 magnetic affinity microspheres (MAMSs) had a narrow particle size distribution between 250 and 260nm, and displayed superparamagnetism with a saturation magnetization value of 67.0emu/g. Comprehensively, the possible formation mechanism of MnFe2O4 microspheres with ferric and manganous sources as dual precursors was elucidated by comparison with those of Fe3O4 nanoparticles and MnOOH nanosheets respectively with either ferric or manganous source as single precursor...
May 1, 2017: Talanta
https://www.readbyqxmd.com/read/28210512/porphyria-cutanea-tarda-in-a-patient-with-end-stage-renal-disease-a-case-of-successful-treatment-with-deferoxamine-and-ferric-carboxymaltose
#12
Natacha Rodrigues, Fernando Caeiro, Alice Santana, Teresa Mendes, Leonor Lopes
Porphyria cutanea tarda (PCT) is a rare disease, with a strong association with hepatitis C virus. PCT is particularly problematic in end-stage renal disease patients as they have no renal excretion of porphyrins and these are poorly dialyzed. Also, conventional treatment of PCT is compromised in these patients as hydroxychloroquine is contraindicated, phlebotomies with the stipulated frequency are poorly tolerated in already anaemia-prone patients, and iron-chelating agents are less efficient in removing iron and contribute to worsening anaemia...
2017: Case Reports in Nephrology
https://www.readbyqxmd.com/read/28208844/spectrum-of-factors-triggering-endothelial-dysfunction-in-pih
#13
Visala Sree Jammalamadaga, Philips Abraham
INTRODUCTION: Pre-eclampsia (PE) is a major cause of maternal and fetal/neonatal mortality and morbidity. The aetiology and pathogenesis of PE is yet to be completely understood. Evidence shows that, Endothelial Dysfunction (ED) plays a pivotal role in the genesis of this multi-system disorder that develops in PE and eclampsia. AIM: To determine the circulating levels of factors Malondialdehyde (MDA), Ferric Reducing Ability of Plasma-α (FRAP), Tumour Necrosis Factor (TNF-α), sFlt-1, VEGF, PlGF, Nitric Oxide (NO) that influence the ED...
December 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28208014/improved-antitumor-efficacy-of-hyaluronic-acid-complexed-paclitaxel-nanoemulsions-in-treating-non-small-cell-lung-cancer
#14
Joo-Eun Kim, Young-Joon Park
Paclitaxel (PTX) is a effectively chemotherapeutic agent which is extensively able to treat the non-small cell lung, pancreatic, breast and other cancers. But it is a practically insoluble drug with water solubility less than 1 µg/mL, which restricts its therapeutic application. To overcome the problem, hyaluronic acid-complexed paclitaxel nanoemulsions (HPNs) were prepared by ionic complexation of paclitaxel (PTX) nanoemulsions and hyaluronic acid (HA) to specifically target non-small cell lung cancer. HPNs were composed of DL-α-tocopheryl acetate, soybean oil, polysorbate 80, ferric chloride, and HA and fabricated by high-pressure homogenization...
February 17, 2017: Biomolecules & Therapeutics
https://www.readbyqxmd.com/read/28206897/retrospective-study-of-the-survival-rates-of-indirect-pulp-therapy-versus-different-pulpotomy-medicaments
#15
Patrice Barsamian Wunsch, Marissa M Kuhnen, Al M Best, Tegwyn H Brickhouse
PURPOSE: The purposes of this retrospective chart review were to determine: (1) how primary molars in need of vital pulp therapy (VPT) have been treated over a period of four years at a university-based pediatric dental practice (UBP); and which treatments-indirect pulp therapy (IPT), formocresol pulpotomy (FCP), and ferric sulfate pulpotomy (FSP)-have been successful. METHODS: Electronic patient records (axiUm) that contained the procedure codes D3120 (pulp cap-indirect) or D3220 (therapeutic pulpotomy) were totaled by year...
October 15, 2016: Pediatric Dentistry
https://www.readbyqxmd.com/read/28199867/plant-wide-modelling-of-phosphorus-transformations-in-wastewater-treatment-systems-impacts-of-control-and-operational-strategies
#16
K Solon, X Flores-Alsina, C Kazadi Mbamba, D Ikumi, E I P Volcke, C Vaneeckhaute, G Ekama, P A Vanrolleghem, D J Batstone, K V Gernaey, U Jeppsson
The objective of this paper is to report the effects that control/operational strategies may have on plant-wide phosphorus (P) transformations in wastewater treatment plants (WWTP). The development of a new set of biological (activated sludge, anaerobic digestion), physico-chemical (aqueous phase, precipitation, mass transfer) process models and model interfaces (between water and sludge line) were required to describe the required tri-phasic (gas, liquid, solid) compound transformations and the close interlinks between the P and the sulfur (S) and iron (Fe) cycles...
February 6, 2017: Water Research
https://www.readbyqxmd.com/read/28197528/antimutagenic-effect-of-hibiscus-sabdariffa-l-aqueous-extract-on-rats-treated-with-monosodium-glutamate
#17
Ana Carla Guidini Valentini Gheller, Jacqueline Kerkhoff, Gerardo Magela Vieira Júnior, Kleber Eduardo de Campos, Marina Mariko Sugui
Hibiscus sabdariffa L. is a plant of the Malvaceae family, commonly known as roselle. H. sabdariffa is known to contain antioxidant, cholesterol-lowering, antiobesity, insulin resistance reduction, antihypertensive, and skin cancer chemopreventive properties. This study evaluated the effects of H. sabdariffa aqueous extract against cyclophosphamide (CPA, 25 mg/Kg) induced damage to DNA in male Wistar rats by micronucleus test. Samples of H. sabdariffa calyx were obtained in the municipality of Barra do Garças, Mato Grosso, Brazil...
2017: TheScientificWorldJournal
https://www.readbyqxmd.com/read/28195547/phenolic-compounds-from-citrus-leaves-antioxidant-activity-and-enzymatic-browning-inhibition
#18
Bachra Khettal, Nabil Kadri, Karim Tighilet, Ahmed Adjebli, Farid Dahmoune, Fadila Maiza-Benabdeslam
Background Phenolic compounds from Citrus are known to be a topic of many studies due to their biological properties including antioxidant activity. Methods Methanolic and aqueous extracts were isolated from Citrus leaves of different species (C. clementina, C. limon, C. hamlin, C. navel, C. aurantifolia, C. aurantium and C. grandis) harvested in Algeria. Results The results showed that aqueous extracts of all species are rich in total phenolic compounds and flavonoids (from 68.23 to 125.28 mg GAE/g DM) and (from 11...
February 14, 2017: Journal of Complementary & Integrative Medicine
https://www.readbyqxmd.com/read/28195347/characterization-of-ferroptosis-in-murine-models-of-hemochromatosis
#19
Hao Wang, Peng An, Enjun Xie, Qian Wu, Xuexian Fang, Hong Gao, Zhuzhen Zhang, Yuzhu Li, Xudong Wang, Jiaying Zhang, Guoli Li, Lei Yang, Wei Liu, Junxia Min, Fudi Wang
Ferroptosis is a recently identified iron-dependent form of non-apoptotic cell death implicated in brain, kidney, and heart pathology. However, the biological roles of iron and iron metabolism in ferroptosis remain poorly understood. Here, we studied the functional role of iron and iron metabolism in the pathogenesis of ferroptosis. We found that ferric citrate potently induces ferroptosis in murine primary hepatocytes and bone marrow-derived macrophages (BMDMs). Next, we screened for ferroptosis in mice fed a high-iron diet and in mouse models of hereditary hemochromatosis with iron overload...
February 13, 2017: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/28195138/bioproduction-characterization-anticancer-and-antioxidant-activities-of-extracellular-melanin-pigment-produced-by-newly-isolated-microbial-cell-factories-streptomyces-glaucescens-neae-h
#20
Noura El-Ahmady El-Naggar, Sara M El-Ewasy
In this present study, a newly isolated strain, Streptomyces sp. NEAE-H, capable of producing high amount of black extracellular melanin pigment on peptone-yeast extract iron agar and identified as Streptomyces glaucescens NEAE-H. Plackett-Burman statistical design was conducted for initial screening of 17 independent (assigned) variables for their significances on melanin pigment production by Streptomyces glaucescens NEAE-H. The most significant factors affecting melanin production are incubation period, protease-peptone and ferric ammonium citrate...
February 14, 2017: Scientific Reports
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