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https://www.readbyqxmd.com/read/28340273/genetic-diversity-and-selection-of-common-bean-lines-based-on-technological-quality-and-biofortification
#1
S de M Steckling, N D Ribeiro, F D Arns, H C Mezzomo, M T D F Possobom
The development of common bean cultivars with high technological quality that are biofortified with minerals, is required to meet the demand for food with health benefits. The objectives of this study were to evaluate whether common bean genotypes differ in terms of technological and mineral biofortification traits, to study the correlations between these characters, to analyze the genetic dissimilarity of common bean genotypes, and to select superior lines for these traits. For this, 14 common bean genotypes were evaluated in experiments conducted in three growing seasons in the Rio Grande do Sul State, Brazil...
March 22, 2017: Genetics and Molecular Research: GMR
https://www.readbyqxmd.com/read/28330314/bioremediation-of-heavy-metals-using-an-endophytic-bacterium-paenibacillus-sp-rm-isolated-from-the-roots-of-tridax-procumbens
#2
M Govarthanan, R Mythili, T Selvankumar, S Kamala-Kannan, A Rajasekar, Young-Cheol Chang
The aim of the present study was to assess the bioremediation potential of endophytic bacteria isolated from roots of Tridax procumbens plant. Five bacterial endophytes were isolated and subsequently tested for minimal inhibitory concentration (MIC) against different heavy metals. Amongst the five isolates, strain RM exhibited the highest resistance to copper (750 mg/l), followed by zinc (500 mg/l), lead (450 mg/l), and arsenic (400 mg/l). Phylogenetic analysis of the 16S rDNA sequence suggested that strain RM was a member of genus Paneibacillus...
December 2016: 3 Biotech
https://www.readbyqxmd.com/read/28325649/elemental-analysis-of-serum-and-hair-from-pre-eclamptic-south-african-women
#3
K Maduray, J Moodley, C Soobramoney, R Moodley, T Naicker
Pre-eclampsia is a hypertensive disorder that is associated with adverse maternal and perinatal outcomes. It has been proposed that specific trace and macro elements associated with antioxidant activities may also play a contributory role in aetiology of pre-eclampsia. The aim of this study was to measure the concentrations of thirteen different elements in hair and serum samples from women with a diagnosis of pre-eclampsia and compare them with normotensive controls. Venous blood and pubic hair samples were collected from forty-three pre-eclamptic and twenty-three normotensive pregnant women...
March 9, 2017: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/28325440/mixed-convection-peristaltic-motion-of-copper-water-nanomaterial-with-velocity-slip-effects-in-a-curved-channel
#4
T Hayat, S Farooq, A Alsaedi
BACKGROUND AND OBJECTIVE: The primary objective of present analysis is to model the peristalsis of copper-water based nanoliquid in the presence of first order velocity and thermal slip conditions in a curved channel. Mixed convection, viscous dissipation and heat generation/absorption are also accounted. METHOD: Mathematical formulation is simplified under the assumption of small Reynolds number and large wavelength. Regular perturbation technique is employed to find the solution of the resulting equations in terms of series for small Brinkman number...
April 2017: Computer Methods and Programs in Biomedicine
https://www.readbyqxmd.com/read/28319022/recovery-of-lignin-peroxidase-from-submerged-liquid-fermentation-of-amauroderma-rugosum-blume-t-nees-torrend-using-polyethylene-glycol-salt-aqueous-two-phase-system
#5
Wan Yng Linda Jong, Pau Loke Show, Tau Chuan Ling, Yee Shin Tan
Amauroderma rugosum is a wild mushroom species widely distributed in tropics and is classified under the class of Basidiomycetes. Basidiomycetes are well-known for their abilities of producing lignocellulolytic enzymes such as lignin peroxidase (LiP), laccase (Lac) and manganese peroxidase (MnP). Different factors such as nutrient sources, incubation period and agitation affect the production of lignocellulolytic enzymes. The A. rugosum produced LiP in the medium supplemented with potato dextrose broth (PDB), 0...
March 16, 2017: Journal of Bioscience and Bioengineering
https://www.readbyqxmd.com/read/28315108/osmolytic-effect-of-sucrose-on-thermal-denaturation-of-pea-seedling-copper-amine-oxidase
#6
Mojtaba Amani, Aboozar Barzegar, Mohammad Mazani
Protein stability is a subject of interest by many researchers. One of the common methods to increase the protein stability is using the osmolytes. Many studies and theories analyzed and explained osmolytic effect by equilibrium thermodynamic while most proteins undergo an irreversible denaturation. In current study we investigated the effect of sucrose as an osmolyte on the thermal denaturation of pea seedlings amine oxidase by the enzyme activity, fluorescence spectroscopy, circular dichroism, and differential scanning calorimetry...
March 18, 2017: Protein Journal
https://www.readbyqxmd.com/read/28304020/interaction-of-copper-with-dinitrogen-tetroxide-in-1-butyl-3-methylimidazolium-based-ionic-liquids
#7
I V Morozov, E B Deeva, T Yu Glazunova, S I Troyanov, F I Guseinov, L M Kustov
Ionic liquids that are stable toward oxidation and nitration and are based on the 1-n-butyl-3-methylimidazolium cation (BMIm(+)) can be used as solvents and reaction media for copper dissolution in liquid dinitrogen tetraoxide N2O4. The ionic liquid not only favors the dissociation of N2O4 into NO(+) and NO3(-), but also takes part in the formation of different crystalline products. Thus, NO[BF4], NO[Cu(NO3)3] and (BMIm)2[Cu2(CF3COO)6] were prepared using (BMIm)A, A(-) = [BF4](-), (CF3SO2)2N(-), CF3COO(-), respectively...
March 27, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28303526/a-herbivore-tag-and-trace-system-reveals-contact-and-density-dependent-repellence-of-a-root-toxin
#8
Zoe Bont, Carla Arce, Meret Huber, Wei Huang, Adrien Mestrot, Craig J Sturrock, Matthias Erb
Foraging behavior of root feeding organisms strongly affects plant-environment-interactions and ecosystem processes. However, the impact of plant chemistry on root herbivore movement in the soil is poorly understood. Here, we apply a simple technique to trace the movement of soil-dwelling insects in their habitats without disturbing or restricting their interactions with host plants. We tagged the root feeding larvae of Melolontha melolontha with a copper ring and repeatedly located their position in relation to their preferred host plant, Taraxacum officinale, using a commercial metal detector...
March 16, 2017: Journal of Chemical Ecology
https://www.readbyqxmd.com/read/28303424/inherited-disorders-of-transition-metal-metabolism-an-update
#9
REVIEW
Peter T Clayton
Elements with a biological role include six trace transition metals: manganese, iron, cobalt, copper, zinc and molybdenum. Transition metals participate in group transfer reactions such as glycosylation and phosphorylation and those that can transfer an electron by alternating between two redox states such as iron (3+/2+) and copper (2+/1+) are also very important in biological redox reactions including the reduction of molecular oxygen and the transport of oxygen. However, these trace metals are also potentially toxic, generating reactive oxygen species through Fenton chemistry...
March 16, 2017: Journal of Inherited Metabolic Disease
https://www.readbyqxmd.com/read/28302430/antimicrobial-copper-alloys-decreased-bacteria-on-stethoscope-surfaces
#10
Michael G Schmidt, Rachel E Tuuri, Arif Dharsee, Hubert H Attaway, Sarah E Fairey, Keith T Borg, Cassandra D Salgado, Bruce E Hirsch
BACKGROUND: Stethoscopes may serve as vehicles for transmission of bacteria among patients. The aim of this study was to assess the efficacy of antimicrobial copper surfaces to reduce the bacterial concentration associated with stethoscope surfaces. METHODS: A structured prospective trial involving 21 health care providers was conducted at a pediatric emergency division (ED) (n = 14) and an adult medical intensive care unit located in tertiary care facilities (n = 7)...
March 13, 2017: American Journal of Infection Control
https://www.readbyqxmd.com/read/28298193/identification-of-two-novel-mutations-in-the-slc45a2-gene-in-a-hungarian-pedigree-affected-by-unusual-oca-type-4
#11
Lola Tóth, Beáta Fábos, Katalin Farkas, Adrienn Sulák, Kornélia Tripolszki, Márta Széll, Nikoletta Nagy
BACKGROUND: Oculocutaneous albinism (OCA) is a clinically and genetically heterogenic group of pigmentation abnormalities. OCA type IV (OCA4, OMIM 606574) develops due to homozygous or compound heterozygous mutations in the solute carrier family 45, member 2 (SLC45A2) gene. This gene encodes a membrane-associated transport protein, which regulates tyrosinase activity and, thus, melanin content by changing melanosomal pH and disrupting the incorporation of copper into tyrosinase. METHODS: Here we report two Hungarian siblings affected by an unusual OCA4 phenotype...
March 15, 2017: BMC Medical Genetics
https://www.readbyqxmd.com/read/28297349/effect-of-fluoroscopic-x-ray-beam-spectrum-on-air-kerma-measurement-accuracy-implications-for-establishing-correction-coefficients-on-interventional-fluoroscopes-with-kap-meters
#12
Kevin A Wunderle, Joseph T Rakowski, Frank F Dong
The first goal of this study was to investigate the accuracy of the displayed reference plane air kerma (Ka,r) or air kerma-area product (Pk,a) over a broad spectrum of X-ray beam qualities on clinically used interventional fluoroscopes incorporating air kerma-area product meters (KAP meters) to measure X-ray output. The second goal was to investigate the accuracy of a correction coefficient (CC) determined at a single beam quality and applied to the measured Ka,r over a broad spectrum of beam qualities. Eleven state-of-the-art interventional fluoroscopes were evaluated, consisting of eight Siemens Artis zee and Artis Q systems and three Philips Allura FD systems...
May 2016: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28294147/criticality-enhanced-magnetocaloric-effect-in-quantum-spin-chain-material-copper-nitrate
#13
Jun-Sen Xiang, Cong Chen, Wei Li, Xian-Lei Sheng, Na Su, Zhao-Hua Cheng, Qiang Chen, Zi-Yu Chen
In this work, a systematic study of Cu(NO3)2·2.5 H2O (copper nitrate hemipentahydrate, CN), an alternating Heisenberg antiferromagnetic chain model material, is performed with multi-technique approach including thermal tensor network (TTN) simulations, first-principles calculations, as well as magnetization measurements. Employing a cutting-edge TTN method developed in the present work, we verify the couplings J = 5.13 K, α = 0.23(1) and Landé factors g∥= 2.31, g⊥ = 2.14 in CN, with which the magnetothermal properties have been fitted strikingly well...
March 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28287569/self-assembling-morphologies-obtained-from-helical-polycarbodiimide-copolymers-and-their-triazole-derivatives
#14
Oleg V Kulikov, Dumindika A Siriwardane, Gregory T McCandless, Samsuddin F Mahmood, Bruce M Novak
A facile method for the preparation of polycarbodiimide-based secondary structures (e.g., nano-rings, "craters," fibers, looped fibers, fibrous networks, ribbons, worm-like aggregates, toroidal structures, and spherical particles) is described. These aggregates are morphologically influenced by extensive hydrophobic side chain-side chain interactions of the singular polycarbodiimide strands, as inferred by atomic force microscopy (AFM) and scanning electron microscopy (SEM) techniques. Polycarbodiimide-g-polystyrene copolymers (PS-PCDs) were prepared by a combination of synthetic methods, including coordination-insertion polymerization, copper(I)-catalyzed azide alkyne cycloaddition (CuAAC) "click" chemistry, and atom transfer radical polymerization (ATRP)...
February 7, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28285895/transcriptomic-analysis-of-basidiocarp-development-in-ustilago-maydis-dc-cda
#15
C G León-Ramírez, J L Cabrera-Ponce, D Martínez-Soto, A Sánchez-Arreguin, E T Aréchiga-Carvajal, J Ruiz-Herrera
Previously, we demonstrated that when Ustilago maydis (DC) Cda., a phytopathogenic basidiomycete and the causal agent of corn smut, is grown in the vicinity of maize embryogenic calli in a medium supplemented with the herbicide Dicamba, it developed gastroid-like basidiocarps. To elucidate the molecular mechanisms involved in the basidiocarp development by the fungus, we proceeded to analyze the transcriptome of the process, identifying a total of 2002 and 1064 differentially expressed genes at two developmental stages, young and mature basidiocarps, respectively...
March 7, 2017: Fungal Genetics and Biology: FG & B
https://www.readbyqxmd.com/read/28285107/selective-removal-of-heavy-metal-ions-by-disulfide-linked-polymer-networks
#16
Dongah Ko, Joo Sung Lee, Hasmukh A Patel, Mogens H Jakobsen, Yuhoon Hwang, Cafer T Yavuz, Hans Chr Bruun Hansen, Henrik R Andersen
Heavy metal contaminated surface water is one of the oldest pollution problems, which is critical to ecosystems and human health. We devised disulfide linked polymer networks and employed as a sorbent for removing heavy metal ions from contaminated water. Although the polymer network material has a moderate surface area, it demonstrated cadmium removal efficiency equivalent to highly porous activated carbon while it showed 16 times faster sorption kinetics compared to activated carbon, owing to the high affinity of cadmium towards disulfide and thiol functionality in the polymer network...
March 6, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28284546/accumulation-of-coal-combustion-residues-and-their-immunological-effects-in-the-yellow-bellied-slider-trachemys-scripta-scripta
#17
David L Haskins, Matthew T Hamilton, Amanda L Jones, John W Finger, Robert B Bringolf, Tracey D Tuberville
Anthropogenic activities such as industrial processes often produce copious amounts of contaminants that have the potential to negatively impact growth, survival, and reproduction of exposed wildlife. Coal combustion residues (CCRs) represent a major source of pollutants globally, resulting in the release of potentially harmful trace elements such as arsenic (As), cadmium (Cd), and selenium (Se) into the environment. In the United States, CCRs are typically stored in aquatic settling basins that may become attractive nuisances to wildlife...
March 8, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28284195/zinc-stress-induces-copper-depletion-in-acinetobacter-baumannii
#18
Karl A Hassan, Victoria G Pederick, Liam D H Elbourne, Ian T Paulsen, James C Paton, Christopher A McDevitt, Bart A Eijkelkamp
BACKGROUND: The first row transition metal ions zinc and copper are essential to the survival of many organisms, although in excess these ions are associated with significant toxicity. Here, we examined the impact of zinc and copper stress on Acinetobacter baumannii, a common opportunistic pathogen. RESULTS: We show that extracellular zinc stress induces a copper-specific depletion phenotype in A. baumannii ATCC 17978. Supplementation with copper not only fails to rescue this phenotype, but further exacerbates the copper depletion...
March 11, 2017: BMC Microbiology
https://www.readbyqxmd.com/read/28282608/impact-of-lignin-structure-on-oil-production-via-hydroprocessing-with-a-copper-doped-porous-metal-oxide-catalyst
#19
Sebastien Gillet, Laurene Petitjean, Mario Aguedo, Chun-Ho Lam, Christophe Blecker, Paul T Anastas
A copper-catalyzed depolymerization strategy was employed to investigate the impact of lignin structure on the distribution of hydroprocessing products. Specifically, lignin was extracted from beech wood and miscanthus grass. The extracted lignins, as well as a commercial lignin (P1000), were then fractionated using ethyl acetate to provide three different portions for each source of lignin [total of 9 fractions]. Each fraction was structurally characterized and treated with a copper-doped porous metal oxide (Cu-PMO) catalyst under 4MPa H2 and at 180°C for 12h...
February 23, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28278781/phytoremediation-potential-of-water-caltrop-trapa-natans-l-using-municipal-wastewater-of-the-activated-sludge-process-based-municipal-wastewater-treatment-plant
#20
Vinod Kumar, A K Chopra
Phytoremediation experiments were carried out to assess the phytoremediation potential of water caltrop (Trapa natans L.) using municipal wastewater collected from the activated sludge process- (ASP) based municipal wastewater treatment plant. The results revealed that T. natans significantly (P ≤ .05/P ≤ .01/P ≤ .001) reduced the contents of total dissolved solids (TDS), electrical conductivity (EC), biochemical oxygen demand (BOD5), chemical oxygen demand, total Kjeldahl nitrogen, phosphate ([Formula: see text]), sodium (Na(+)), potassium (K(+)), calcium (Ca(2+)), magnesium (Mg(2+)), cadmium (Cd), chromium (Cr), copper (Cu), iron (Fe), manganese (Mn), lead (Pb), zinc (Zn), standard plate count, and most probable number of the municipal wastewater after phytoremediation experiments...
February 22, 2017: Environmental Technology
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