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https://www.readbyqxmd.com/read/27905292/the-effect-of-iron-deficiency-on-the-temporal-changes-in-the-expression-of-genes-associated-with-fat-metabolism-in-the-pregnant-rat
#1
Susan M Hay, Harry J McArdle, Helen E Hayes, Valerie J Stevens, William D Rees
Iron is essential for the oxidative metabolism of lipids. Lipid metabolism changes during gestation to meet the requirements of the growing fetus and to prepare for lactation. The temporal effects of iron deficiency during gestation were studied in female rats fed complete or iron-deficient diets. Plasma triglycerides were elevated in the iron-deficient group throughout gestation. There were time-dependent changes in the triglyceride content of the maternal liver, falling at the midpoint of gestation and then increasing on d21...
November 2016: Physiological Reports
https://www.readbyqxmd.com/read/27904406/preparation-identification-and-antioxidant-properties-of-black-bone-silky-fowl-gallus-gallus-domesticus-brisson-iron-ii-oligopeptide-chelate
#2
Huanglei Pan, Shasha Song, Qiuyue Ma, Hui Wei, Difeng Ren, Jun Lu
Black-bone silky fowl iron(II)-oligopeptide chelate was synthesized from iron(II) solution and the black-bone silky fowl oligopeptide, which was extracted from the muscle protein of black-bone silky fowl (Gallus gallus domesticus Brisson). Orthogonal array analysis was used to determine the optimal conditions for the iron(II)-oligopeptide chelate preparation. Ultraviolet-visible (UV-Vis) spectroscopy, electron microscopy, and Fourier transform infrared (FTIR) spectroscopy were used to identify the structure of iron(II)-oligopeptide chelate...
June 2016: Food Technology and Biotechnology
https://www.readbyqxmd.com/read/27900381/thin-layered-drawing-media-probed-by-thz-time-domain-spectroscopy
#3
J Tasseva, A Taschin, P Bartolini, J Striova, R Fontana, R Torre
Dry and wet drawing materials were investigated by THz time-domain spectroscopy in transmission mode. Carbon-based and iron-gall inks have been studied, some prepared following ancient recipes and others using current synthetic materials; a commercial ink was studied as well. We measured the THz signals on the thin films of liquid inks deposited on polyethylene pellicles, comparing the results with the thick pellets of dried inks blended with polyethylene powder. This study required the implementation of an accurate experimental method and data analysis procedure able to provide a reliable extraction of the material transmission parameters from a structured sample composed of thin layers, down to a thickness of a few tens of micrometers...
November 30, 2016: Analyst
https://www.readbyqxmd.com/read/27899234/in-search-of-alternatives-to-dopaminergic-ligands-for-the-treatment-of-restless-legs-syndrome-iron-glutamate-and-adenosine
#4
REVIEW
Sergi Ferré, Christopher Earley, Seema Gulyani, Diego Garcia-Borreguero
Dopaminergic drugs have been used as the first-line treatment for restless legs syndrome (RLS) for many years and are considered to be, at least over the short-term, effective and safe. However, the main long-term complication of dopaminergic treatment is augmentation, which is an overall increase in symptom severity and intensity, with symptoms starting earlier in the afternoon and expanding to previously unaffected parts of the body. Augmentation is a common complication, with prevalence rates of nearly 50%, and is a common cause of treatment failure...
November 1, 2016: Sleep Medicine
https://www.readbyqxmd.com/read/27895383/preparation-and-antioxidant-pro-oxidant-activities-of-3-monosubstituted-5-hydroxyoxindole-derivatives
#5
Daisuke Yasuda, Kyoko Takahashi, Tomoyuki Ohe, Shigeo Nakamura, Tadahiko Mashino
Antioxidant treatments have been expected to be a novel therapeutics for various oxidative stress-mediated disorders. Our previous study revealed that 5-hydroxyoxindole and its 3-phenacyl-3-hydroxy derivatives showed excellent antioxidant activities such as 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging activity and lipid-peroxidation inhibitory activity. However, the DPPH radical scavenging activity of the 3,3-disubstituted derivatives was lower than that of the original 5-hydroxyoxindole. In the present study, we synthesized novel 3-monosubstituted 5-hydroxyoxindole derivatives that exhibited stronger DPPH radical scavenging activities and lipid peroxidation-inhibitory activities than the 3,3-disubstituted 5-hydroxyoxindoles...
November 2016: Journal of Clinical Biochemistry and Nutrition
https://www.readbyqxmd.com/read/27892575/heat-treated-carbon-supported-iron-ii-phthalocyanine-oxygen-reduction-catalysts-elucidation-of-the-structure-activity-relationship-using-x-ray-absorption-spectroscopy
#6
Hamish A Miller, Marco Bellini, Werner Oberhauser, Xin Deng, Hengquan Chen, Qinggang He, Maurizio Passaponti, Massimo Innocenti, Ruoou Yang, Fanfei Sun, Zheng Jiang, Francesco Vizza
This paper focuses on studying the influence of the heat treatment on the structure and activity of carbon supported Fe(ii)phthalocyanine (FePc/C) oxygen reduction reaction (ORR) catalysts under alkaline conditions. The FePc macrocycle was deposited onto ketjen black carbon and heated treated for 2 hours under inert atmosphere (Ar) at different temperatures (400, 500, 600, 700, 800, 900 and 1000 °C). The atomic structure of Fe in each sample has been determined by XAS and correlated to the activity and ORR mechanisms determined in electrochemical half cells and in a complete H2/O2 anion exchange membrane fuel cells (AEM-FC)...
November 28, 2016: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/27890658/magnetic-mapping-of-iron-in-rodent-spleen
#7
Angela R Blissett, Brooke Ollander, Brittany Penn, Dana M McTigue, Gunjan Agarwal
Evaluation of iron distribution and density in biological tissues is important to understand the pathogenesis of a variety of diseases and the fate of exogenously administered iron-based carriers and contrast agents. Iron distribution in tissues is typically characterized via histochemical (Perl's) stains or immunohistochemistry for ferritin, the major iron storage protein. A more accurate mapping of iron can be achieved via ultrastructural transmission electron microscopy (TEM) based techniques, which involve stringent sample preparation conditions...
November 24, 2016: Nanomedicine: Nanotechnology, Biology, and Medicine
https://www.readbyqxmd.com/read/27890622/multi-functional-nanoparticles-as-theranostic-agents-for-treatment-imaging-in-pancreatic-cancer
#8
L R Jaidev, David Raj Chellappan, Dhiraj Vasanth Bhavsar, Ravi Ranganathan, Banudevi Sivanantham, Anuradha Subramanian, Uma Sharma, Narnamangalam R Jagannathan, Uma Maheswari Krishnan, Swaminathan Sethuraman
: Theranostics has received considerable attention since both therapy and imaging modalities can be integrated into a single nanocarrier. In this study, fluorescent iron oxide (FIO) nanoparticles and gemcitabine (G) encapsulated poly(lactide-co-glycolide) (PLGA) nanospheres (PGFIO) conjugated with human epidermal growth factor receptor 2, (HER-2) antibody (HER-PGFIO) were prepared and characterized. HER-PGFIO showed the magnetic moment of 10 emu/g, relaxivity (r2) of 773 mM(-1)s(-1) and specific absorption rate (SAR) of 183 W/g...
November 23, 2016: Acta Biomaterialia
https://www.readbyqxmd.com/read/27889952/effects-of-different-doses-of-2-3-dimercaptosuccinic-acid-modified-fe2-o3-nanoparticles-on-intercalated-discs-in-engineered-cardiac-tissues
#9
Yongchao Mou, Shuanghong Lv, Fei Xiong, Yao Han, Yuwei Zhao, Junjie Li, Ning Gu, Jin Zhou
Although iron oxide nanoparticles (IRONs) were applied in clinical magnetic resonance imaging in vivo and magnetic tissue engineering in vitro widely, the underlying effects of IRONs on the development of cardiomyocytes especially the intercellular junctions, intercalated discs (IDs), remain an unknown issue. Given the critical role of three-dimensional (3D) engineered cardiac tissues (ECTs) in evaluation of nanoparticles toxicology, it remained necessary to understand the effects of IRONs on IDs assembly of cardiomyocytes in 3D environment...
November 27, 2016: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/27889746/distinct-in-vitro-complement-activation-by-various-intravenous-iron-preparations
#10
Julia Cordelia Hempel, Felix Poppelaars, Mariana Gaya da Costa, Casper F M Franssen, Thomas P G de Vlaam, Mohamed R Daha, Stefan P Berger, Marc A J Seelen, Carlo A J M Gaillard
BACKGROUND: Intravenous (IV) iron preparations are widely used in the treatment of anemia in patients undergoing hemodialysis (HD). All IV iron preparations carry a risk of causing hypersensitivity reactions. However, the pathophysiological mechanism is poorly understood. We hypothesize that a relevant number of these reactions are mediated by complement activation, resulting in a pseudo-anaphylactic clinical picture known as complement activation-related pseudo allergy (CARPA). METHODS: First, the in-vitro complement-activating capacity was determined for 5 commonly used IV iron preparations using functional complement assays for the 3 pathways...
November 26, 2016: American Journal of Nephrology
https://www.readbyqxmd.com/read/27886401/not-all-that-glitters-is-gold-electron-microscopy-study-on-uptake-of-gold-nanoparticles-in-daphnia-magna-and-related-artefacts
#11
Louise Helene Søgaard Jensen, Lars Michael Skjolding, Amalie Thit, Sara Nørgaard Sørensen, Carsten Købler, Kristian Mølhave, Anders Baun
Increasing use of engineered nanoparticles has led to extensive research into their potential hazards to the environment and human health. Cellular uptake from the gut is sparsely investigated and microscopy techniques applied for uptake studies can result in misinterpretations. Various microscopy techniques are used to investigate internalization of 10 nm gold nanoparticles in Daphnia magna gut lumen and gut epithelial cells upon 24h exposure and outline potential artefacts, i.e. high contract precipitates from sample preparation related to these techniques...
November 25, 2016: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/27883942/dye-degradation-by-green-heterogeneous-fenton-catalysts-prepared-in-presence-of-camellia-sinensis
#12
Samira S F Carvalho, Nakédia M F Carvalho
This work describes the synthesis and characterization of supported green iron catalysts, prepared with Camellia sinensis tea extract, and their application in heterogeneous Fenton degradation of pollutant dyes. The influence of the catalyst synthesis conditions in the iron and organic content were investigated by X-ray fluorescence and thermogravimetric analyses. Irregular, chain-like nanoparticles, in the size range of 20-100 nm, capped by polyphenolic natural compounds, were visualized by TEM micrographs...
November 21, 2016: Journal of Environmental Management
https://www.readbyqxmd.com/read/27876566/a-novel-recovery-method-of-copper-from-waste-printed-circuit-boards-by-supercritical-methanol-process-preparation-of-ultrafine-copper-materials
#13
Fu-Rong Xiu, Huiwei Weng, Yingying Qi, Gending Yu, Zhigang Zhang, Fu-Shen Zhang, Mengjun Chen
In this study, supercritical methanol (SCM) process was successfully used for the preparation of ultrafine copper materials from waste printed circuit boards (PCBs) after nitric acid pretreatment. Waste PCBs were pretreated twice in nitric acid. Sn and Pb were recovered by the first nitric acid pretreatment. The leach liquor with a high concentration of copper ions after the second nitric acid leaching was subjected to SCM process. The mixture of Cu and Cu2O with poor uniformity of particle size was formed due to the effect of ferric iron contained in the leach liquor of waste PCBs, while more uniform and spherical Cu particles with high monodispersity and smaller size could be prepared after the removal of Fe...
November 19, 2016: Waste Management
https://www.readbyqxmd.com/read/27872929/magnetic-iron-oxide-modified-pyropheophorbide-a-fluorescence-nanoparticles-as-photosensitizers-for-photodynamic-therapy-against-ovarian-cancer-skov-3-cells
#14
Guanghui Tan, Wenting Li, Jianjun Cheng, Zhiqiang Wang, Shuquan Wei, Yingxue Jin, Changhong Guo, Fengyu Qu
Magnetic iron oxide modified pyropheophorbide-a fluorescence nanoparticles, Fe3O4@SiO2@APTES@PPa (FSAP), were designed as magnetically targeted photodynamic antineoplastic agents and prepared through continuous covalent chemical modification on the surface of Fe3O4 nanoparticles. The properties of the intermediates and the final product were comprehensively characterized by transmission electron microscopy, powder X-ray diffraction analysis, Fourier transform infrared spectroscopy, vibrating sample magnetometry, zeta potential measurement, ultraviolet-visible absorption spectroscopy, fluorescence emission spectroscopy, and thermogravimetric analysis...
November 30, 2016: Photochemical & Photobiological Sciences
https://www.readbyqxmd.com/read/27870961/design-and-construction-of-multifunctional-hyperbranched-polymers-coated-magnetite-nanoparticles-for-both-targeting-magnetic-resonance-imaging-and-cancer-therapy
#15
Asemeh Mashhadi Malekzadeh, Ali Ramazani, Seyed Jamal Tabatabaei Rezaei, Hassan Niknejad
Magnetic drug targeting is a drug delivery strategy that can be used to improve the therapeutic efficiency on tumor cells and reduce the side effects on normal cells and tissues. The aim in this study is designing a novel multifunctional drug delivery system based on superparamagnetic nanoparticles for cancer therapy. Magnetic nanoparticles were synthesized by coprecipitation of iron oxide followed by coating with poly citric acid (PCA) dendritic macromolecules via bulk polymerization strategy. It was further surface-functionalized with poly(ethylene glycol) (PEG) and then to achieve tumor cell targeting property, folic acid was further incorporated to the surface of prepared carriers via a facile coupling reaction between the hydroxyl end group of the PEG and the carboxyl group of folic acid...
November 10, 2016: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/27870934/remediation-of-hexavalent-chromium-spiked-soil-by-using-synthesized-iron-sulfide-particles
#16
Yujie Li, Wanyu Wang, Liqiang Zhou, Yuanyuan Liu, Zakaria A Mirza, Xiang Lin
Carboxymethyl cellulose (CMC) stabilized microscale iron sulfide (FeS) particles were synthesized and applied to remediate hexavalent chromium (Cr(VI)) spiked soil. The effects of parameters including dosage of FeS particles, soil moisture, and natural organic matter (NOM) in soil were investigated with comparison to iron sulfate (FeSO4). The results show that the stabilized FeS particles can reduce Cr(VI) and immobilize Cr in soil quickly and efficiently. The soil moisture ranging from 40% to 70% and NOM in soil had no significant effects on Cr(VI) remediation by FeS particles...
November 18, 2016: Chemosphere
https://www.readbyqxmd.com/read/27865356/temporal-trends-in-dietary-supplement-prescriptions-of-united-states-military-service-members-suggest-a-decrease-in-pyridoxine-and-increase-in-vitamin-d-supplements-from-2005-to-2013
#17
Joseph J Knapik, Rosenie T Jean, Krista G Austin, Ryan A Steelman, Julia Gannon, Emily K Farina, Harris R Lieberman
Dietary supplements (DSs) can be obtained over-the-counter but can also be prescribed by health-care providers for therapeutic reasons. Few studies have documented this later source despite the fact that 79% of physicians and 82% of nurses have recommended DSs to patients. This investigation assessed prevalence and temporal trends in oral DS prescriptions filled by all United States service members (SMs) from 2005 to 2013 (n = 1 427 080 ± 22 139, mean ± standard deviation (SD)/y). We hypothesize that there would be temporal variations in specific types of DSs...
October 2016: Nutrition Research
https://www.readbyqxmd.com/read/27863761/iron-deficiency-in-cancer-patients
#18
Flávio Augusto Naoum
Anemia is a frequent complication in cancer patients, both at diagnosis and during treatment, with a multifactorial etiology in most cases. Iron deficiency is among the most common causes of anemia in this setting and can develop in nearly half of patients with solid tumors and hematologic malignancies. Surprisingly, this fact is usually neglected by the attending physician in a way that proper and prompt investigation of the iron status is either not performed or postponed. In cancer patients, functional iron deficiency is the predominant mechanism, in which iron availability is reduced due to disease or the therapy-related inflammatory process...
October 2016: Revista Brasileira de Hematologia e Hemoterapia
https://www.readbyqxmd.com/read/27854279/polypyrrole-nanotubes-and-their-carbonized-analogs-synthesis-characterization-gas-sensing-properties
#19
Jitka Kopecká, Miroslav Mrlík, Robert Olejník, Dušan Kopecký, Martin Vrňata, Jan Prokeš, Patrycja Bober, Zuzana Morávková, Miroslava Trchová, Jaroslav Stejskal
Polypyrrole (PPy) in globular form and as nanotubes were prepared by the oxidation of pyrrole with iron(III) chloride in the absence and presence of methyl orange, respectively. They were subsequently converted to nitrogen-containing carbons at 650 °C in an inert atmosphere. The course of carbonization was followed by thermogravimetric analysis and the accompanying changes in molecular structure by Fourier Transform Infrared and Raman spectroscopies. Both the original and carbonized materials have been tested in sensing of polar and non-polar organic vapors...
November 15, 2016: Sensors
https://www.readbyqxmd.com/read/27853782/synthesis-and-coordination-chemistry-of-pnet2-2-bridged-2-ferrocenophanes
#20
Yuki Maeno, Yuko Ishizu, Kazuyuki Kubo, Shoko Kume, Tsutomu Mizuta
The trivalent phosphorus-bridged [2]ferrocenophane complex 2 having NEt2 groups on the respective phosphorus centers was prepared, and its reactions as a diphosphine ligand were examined for iron and chromium carbonyl complexes. Both the phosphorus centers of 2 coordinated to Fe(CO)4 fragments to form (μ-2)-[Fe(CO)4]2, while the bulkier Cr(CO)5 fragment formed only a monochromium complex [Cr(κ(1)-2)(CO)5]. Dissociation of CO from [Cr(κ(1)-2)(CO)5] changed the coordination mode of 2 from κ(1) to κ(2) to form [Cr(κ(2)-2)(CO)4] having a three-membered ring...
November 17, 2016: Dalton Transactions: An International Journal of Inorganic Chemistry
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