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https://www.readbyqxmd.com/read/27909862/combined-characterization-of-bovine-polyhemoglobin-microcapsules-by-uv-vis-absorption-spectroscopy-and-cyclic-voltammetry
#1
Marcos Camargo Knirsch, Filippo Dell'Anno, Marco Salerno, Claudio Larosa, Bronislaw Polakiewicz, Roberto Eggenhöffner, Attilio Converti
Polyhemoglobin produced from pure bovine hemoglobin by reaction with PEG bis(N-succynimidil succinate) as a cross-linking agent was encapsulated in gelatin and dehydrated by freeze-drying. Free carboxyhemoglobin and polyhemoglobin microcapsules were characterized by UV-Vis spectroscopy in the absorption range 450-650 nm and cyclic voltammetry in the voltage range from -0.8 to 0.6 mV to evaluate the ability to break the bond with carbon monoxide and to study the carrier's affinity for oxygen, respectively...
December 1, 2016: Bioprocess and Biosystems Engineering
https://www.readbyqxmd.com/read/27908410/elevated-serum-mda-and-depleted-non-enzymatic-antioxidants-macro-minerals-and-trace-elements-are-associated-with-bipolar-disorder
#2
Manjurul Islam Chowdhury, Maimuna Hasan, Mohammad Safiqul Islam, Md Shahid Sarwar, Mohammad Nurul Amin, S M Naim Uddin, Md Zahedur Rahaman, Sujan Banik, Md Saddam Hussain, Kazushige Yokota, Abul Hasnat
Genetic and neurobiological factors are considered to be the major causes of mood and mental disorders. However, over the past few years, increased levels of serum malondialdehyde and altered levels of various non-enzymatic antioxidants and essential minerals involved in abnormal functional activity have been identified as major contributing factors to the pathogenesis of several neurological disorders. The aim of this study was to determine the levels of the serum lipid peroxidation product malondialdehyde (MDA), antioxidants (vitamin A, E and C), macro-minerals (calcium, potassium and sodium) and trace elements (zinc, iron and selenium) in patients with bipolar disorder and to explore their role in disease progression...
January 2017: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/27907844/oxidation-of-atrazine-in-aqueous-media-by-solar-enhanced-fenton-like-process-involving-persulfate-and-ferrous-ion
#3
Marina Khandarkhaeva, Agniya Batoeva, Denis Aseev, Marina Sizykh, Oyuna Tsydenova
The oxidation of s-triazines (using atrazine (ATZ) as a model compound) by a solar-enhanced Fenton-like process involving persulfate and ferrous ion was studied. A flow-through tubular photoreactor was employed for the experiments. The solar-enhanced oxidative system involving ferrous ion and persulfate (Solar/S2O8(2-)/Fe(2+)) showed the highest ATZ degradation efficiency when compared with other treatments (unactivated S2O8(2-), Solar - sunlight only, S2O8(2-)/Fe(2+), Solar/S2O8(2-)). Complete degradation of ATZ and 20% reduction in total organic carbon (TOC) content were observed after 30min of the treatment...
November 28, 2016: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/27905588/phase-specific-dispersion-of-functional-nanoparticles-in-soft-nanocomposites-resulting-in-enhanced-electromagnetic-screening-ability-dominated-by-absorption
#4
Aishwarya V Menon, Giridhar Madras, Suryasarathi Bose
The effect of phase specific localisation of MWNTs (multiwalled carbon nanotubes) and magnetic FeNi (iron-nickel) alloy particles on bulk electrical conductivity and electromagnetic (EM) wave attenuation was investigated in biphasic co-continuous blends of PVDF/SMA (polyvinylidene fluoride/styrene maleic anhydride). It is envisaged that packing different functional nanoparticles in a given phase of a co-continuous blend can impede the charge transport phenomenon and the overall dispersion state. Therefore, phase specific localisation can facilitate the tuning of the functional properties in biphasic blends...
December 1, 2016: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/27901057/digital-gene-expression-profiling-analysis-of-duodenum-transcriptomes-in-sd-rats-administered-ferrous-sulfate-or-ferrous-glycine-chelate-by-gavage
#5
Zhao Zhuo, Shenglin Fang, Qiaoling Hu, Danping Huang, Jie Feng
The absorption of different iron sources is a trending research topic. Many studies have revealed that organic iron exhibits better bioavailability than inorganic iron, but the concrete underlying mechanism is still unclear. In the present study, we examined the differences in bioavailability of ferrous sulfate and ferrous glycinate in the intestines of SD rats using Illumina sequencing technology. Digital gene expression analysis resulted in the generation of almost 128 million clean reads, with expression data for 17,089 unigenes...
November 30, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27900381/thin-layered-drawing-media-probed-by-thz-time-domain-spectroscopy
#6
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/27897970/an-essential-cell-autonomous-role-for-hepcidin-in-cardiac-iron-homeostasis
#7
Samira Lakhal-Littleton, Magda Wolna, Yu Jin Chung, Helen C Christian, Lisa C Heather, Marcella Brescia, Vicky Ball, Rebeca Diaz, Ana Santos, Daniel Biggs, Kieran Clarke, Benjamin Davies, Peter A Robbins
Hepcidin is the master regulator of systemic iron homeostasis. Derived primarily from the liver, it inhibits the iron exporter ferroportin in the gut and spleen, the sites of iron absorption and recycling respectively. Recently, we demonstrated that ferroportin is also found in cardiomyocytes, and that its cardiac-specific deletion leads to fatal cardiac iron overload. Hepcidin is also expressed in cardiomyocytes, where its function remains unknown. To define the function of cardiomyocyte hepcidin, we generated mice with cardiomyocyte-specific deletion of hepcidin, or knock-in of hepcidin-resistant ferroportin...
November 29, 2016: ELife
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
#8
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/27890768/proton-pump-inhibitor-and-histamine-2-receptor-antagonist-use-and-iron-deficiency
#9
Jameson R Lam, Jennifer L Schneider, Charles P Quesenberry, Douglas A Corley
BACKGROUND AND AIMS: Proton pump inhibitors (PPIs) and histamine-2 receptor antagonists (H2RAs) suppress gastric acid production, which may inhibit iron absorption. However, little data exist regarding whether these medications increase the risk of clinical iron deficiency. METHODS: A community-based case-control study evaluated the association between acid-suppressing medication use and the subsequent risk of iron deficiency. It contrasted 77,046 patients with new iron deficiency diagnoses (January, 1999-December, 2013), with 389,314 controls...
November 24, 2016: Gastroenterology
https://www.readbyqxmd.com/read/27890622/multi-functional-nanoparticles-as-theranostic-agents-for-treatment-imaging-in-pancreatic-cancer
#10
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/27887813/migration-of-75-se-iv-in-crushed-beishan-granite-effects-of-the-iron-content
#11
Jiangang He, Bin Ma, Mingliang Kang, Chunli Wang, Zhe Nie, Chunli Liu
The diffusion of selenite (labeled with (75)Se) in compacted Beishan granite (BsG) was investigated using the in-diffusion capillary method at pH values from ∼2.0 to ∼11.0 under oxic and anoxic conditions. The results indicate that the apparent diffusion coefficient (Da) values of selenite in BsG always reached the minimum at approximately pH 5. Unexpectedly, the Da values under oxic conditions are nearly one order of magnitude lower than those under the anoxic conditions. Further characterization reveals the existence of redox-sensitive Fe(II)-containing components, which can be responsible for the great difference in Da values...
November 9, 2016: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/27885534/zinc-deficiency-after-gastric-bypass-for-morbid-obesity-a-systematic-review
#12
REVIEW
Kamal K Mahawar, Aparna Govil Bhasker, Vivek Bindal, Yitka Graham, Usha Dudeja, Muffazal Lakdawala, Peter K Small
Up to 50% of patients have zinc deficiency before bariatric surgery. Roux-en-Y gastric bypass (RYGB) is the commonest bariatric procedure worldwide. It can further exacerbate zinc deficiency by reducing intake as well as absorption. The British Obesity and Metabolic Surgery Society, therefore, recommends that zinc level should be monitored routinely following gastric bypass. However, the American guidance does not recommend such monitoring for all RYGB patients and reserves it for patients with 'specific findings'...
November 24, 2016: Obesity Surgery
https://www.readbyqxmd.com/read/27875977/theranostics-based-on-iron-oxide-and-gold-nanoparticles-for-imaging-guided-photothermal-and-photodynamic-therapy-of-cancer
#13
S Rajkumar, M Prabaharan
With the progress of nanotechnology, the treatment of cancer by photothermal therapy (PTT) and photodynamic therapy (PDT) using theranostic nanomaterials based on iron oxide (Fe3O4) and gold (Au) nanoparticles (NPs) has received much attention in recent years. The Fe3O4 NPs have been used as imaging-guided PTT of cancer due to their high relaxivity, excellent contrast enhancement, and less toxicity. The Au NPs have been widely employed as a contrast agent for CT imaging of different biological systems due to their enhanced X-ray attenuation property...
November 22, 2016: Current Topics in Medicinal Chemistry
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/27864776/potable-water-quality-monitoring-of-primary-schools-in-magura-district-bangladesh-children-s-health-risk-assessment
#15
Aminur Rahman, Abul Hashem, Shahruk Nur-A-Tomal
Safe potable water is essential for good health. Worldwide, school-aged children especially in the developing countries are suffering from various water-borne diseases. In the study, drinking water supplies for primary school children were monitored at Magura district, Bangladesh, to ensure safe potable water. APHA standard analytical methods were applied for determining the physicochemical parameters of the water samples. For determination of the essential physicochemical parameters, the samples were collected from 20 randomly selected tube wells of primary schools at Magura...
December 0: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/27859814/black-rhinoceros-diceros-bicornis-and-domestic-horse-equus-caballus-hindgut-microflora-demonstrate-similar-fermentation-responses-to-grape-seed-extract-supplementation-in%C3%A2-vitro
#16
N F Huntley, H D Naumann, A L Kenny, M S Kerley
The domestic horse is used as a nutritional model for rhinoceros maintained under human care. The validity of this model for browsing rhinoceros has been questioned due to high prevalence of iron overload disorder (IOD) in captive black rhinoceros (Diceros bicornis), which is associated with high morbidity and mortality. Iron chelators, such as tannins, are under investigation as dietary supplements to ameliorate or prevent IOD in prone species. Polyphenolic compounds variably affect microbial fermentation, so the first objective of this experiment was to evaluate the effects of grape seed extract (GSE; a concentrated source of condensed tannins; CT) on black rhinoceros hindgut fermentation...
November 13, 2016: Journal of Animal Physiology and Animal Nutrition
https://www.readbyqxmd.com/read/27847422/effect-of-tamarindus-indica-leaf-powder-on-plasma-concentrations-of-copper-zinc-and-iron-in-fluorotic-cows
#17
Pinaki Samal, R C Patra, A R Gupta, S K Mishra, D Jena, D Satapathy
AIM: The main objective of the study was to determine the deleterious effect of fluoride on plasma trace minerals of fluorotic cattle and to evaluate the effect of Tamarindus indica leaf powder toward correction of the same. MATERIALS AND METHODS: A total of 30 cattle exhibiting chronic sign of fluorosis and 10 healthy cattle from nonfluorotic area were incorporated in this study. Fluorotic cattle were divided into three equal groups consisting of 10 cattle each...
October 2016: Veterinary World
https://www.readbyqxmd.com/read/27844077/fe-oxy-adducts-of-heme-a%C3%AE-and-heme-hiapp-complexes-intermediates-in-ros-generation
#18
Manas Seal, Soumya Mukherjee, Somdatta Ghosh Dey
Iron (Fe) is the most abundant transition metal ion in the human body and its role, in the form of heme, has been implicated in Alzheimer's disease (AD) and type 2 diabetes mellitus (T2Dm). Heme binds both amyloid beta (Aβ) and human islet amyloid polypeptide (hIAPP) to form heme-Aβ and heme-hIAPP complexes, respectively, and form reactive oxygen species (ROS) like H2O2, O2˙(-)etc., which are known to cause oxidative damage. However the intermediates involved during ROS formation have not yet been isolated...
November 15, 2016: Metallomics: Integrated Biometal Science
https://www.readbyqxmd.com/read/27830928/oral-iron-absorption-test-with-ferrous-bisglycinate-chelate-in-children-with-celiac-disease-preliminary-results
#19
Giuseppe A Mazza, Luisa Pedrelli, Elisabetta Battaglia, Laura Giancotti, Roberto Miniero
BACKGROUND: Celiac disease (CD) is an immunologically-mediated enteropathy resulting in small-bowel mucosal villous atrophy with crypt hyperplasia. Iron malabsorption is usually observed in CD. Only few studies investigated oral iron absorption in subjects with gastrointestinal diseases and Iron Deficiency Anemia (IDA), using the oral iron absorption test (OIAT). We considered useful to investigate the OIAT, using Ferrous Bisglycinate Chelate (FBC), in patients with CD at diagnosis or on Gluten Free Diet (GFD) from at least 1 year...
November 10, 2016: Minerva Pediatrica
https://www.readbyqxmd.com/read/27830072/iron-deficiency-anemia-due-to-excessive-green-tea-drinking
#20
Frank S Fan
Tea interferes with iron absorption and can lead to iron deficiency anemia when consumed in large quantities. The rechallenge effect of green tea on anemia in a middle-aged man emphasizes the potential causal role of this beverage. Lifestyle and dietary habits are important diagnostic considerations in diseases of this type.
November 2016: Clinical Case Reports
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