keyword
MENU ▼
Read by QxMD icon Read
search

Copper T

keyword
https://www.readbyqxmd.com/read/28636320/dna-loading-and-release-using-custom-tailored-poly-l-lysine-surfaces
#1
Amin Shakiba, Sagar L Patil, Oussama Zenasni, Monika E Schmitt, Preethi H Gunaratne, T Randall Lee
This manuscript describes the generation and study of surfaces modified with custom-crafted poly(L-lysine) (PLL) coatings for use in the loading and delivery of single-stranded DNA (ssDNA). The experimental strategy utilizes bidentate dithiol adsorbates to generate stably-bound azide-terminated self-assembled monolayers (SAMs) on gold possessing an oligo(ethylene glycol) (OEG) spacer. Consequent to the molecular assembly on gold, the azide termini are covalently attached to a maleimide linker moiety via a copper-catalyzed azide-alkyne "click" reaction...
June 21, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28636213/distribution-and-hypoxia-regulation-of-haemocyanin-in-springtails-collembola
#2
S Flachsbarth, M Kruse, T Burmester
Haemocyanin is the copper-containing respiratory protein present in many arthropods. In the hexapods, respiratory proteins had long been considered unnecessary as sufficient O2 was thought to be obtained via the trachea. Nevertheless, many ametabolous and hemimetabolous hexapod species actually possess haemocyanin. Here we investigated the occurrence of haemocyanin in Collembola (springtails). Haemocyanin was found in 22 collembolan species of the suborders Symphypleona, Tomoceroidea and Entomobryomorpha, demonstrating its widespread occurrence...
June 21, 2017: Insect Molecular Biology
https://www.readbyqxmd.com/read/28624475/oxidoreductases-on-their-way-to-industrial-biotransformations
#3
REVIEW
Angel T Martínez, Francisco J Ruiz-Dueñas, Susana Camarero, Ana Serrano, Dolores Linde, Henrik Lund, Jesper Vind, Morten Tovborg, Owik M Herold-Majumdar, Martin Hofrichter, Christiane Liers, René Ullrich, Katrin Scheibner, Giovanni Sannia, Alessandra Piscitelli, Cinzia Pezzella, Mehmet E Sener, Sibel Kılıç, Willem J H van Berkel, Victor Guallar, Maria Fátima Lucas, Ralf Zuhse, Roland Ludwig, Frank Hollmann, Elena Fernández-Fueyo, Eric Record, Craig B Faulds, Marta Tortajada, Ib Winckelmann, Jo-Anne Rasmussen, Mirjana Gelo-Pujic, Ana Gutiérrez, José C Del Río, Jorge Rencoret, Miguel Alcalde
Fungi produce heme-containing peroxidases and peroxygenases, flavin-containing oxidases and dehydrogenases, and different copper-containing oxidoreductases involved in the biodegradation of lignin and other recalcitrant compounds. Heme peroxidases comprise the classical ligninolytic peroxidases and the new dye-decolorizing peroxidases, while heme peroxygenases belong to a still largely unexplored superfamily of heme-thiolate proteins. Nevertheless, basidiomycete unspecific peroxygenases have the highest biotechnological interest due to their ability to catalyze a variety of regio- and stereo-selective monooxygenation reactions with H2O2 as the source of oxygen and final electron acceptor...
June 14, 2017: Biotechnology Advances
https://www.readbyqxmd.com/read/28622494/laryngeal-neuropathy-in-adult-goats-with-copper-deficiency
#4
R F A Sousa, V M Almeida, J E Neto, C W A Nascimento, G X Medeiros, R M T Medeiros, F Riet-Correa, F S Mendonça
The aim of this study was to elucidate the cause of a neurological syndrome characterized by stridor in adult goats with clinical signs of copper deficiency. The main clinical signs consisted of apathy, emaciation, pale mucous membranes, mucous nasal discharge, dyspnea, severe achromotrichia, diffuse alopecia, torpor, ataxia, and stridor. When the goats were forced to move, the stridor increased. In a herd of 194 Toggenburg goats, 10 adult goats with clinical signs of copper deficiency were removed from the herd and divided into 2 groups: group 1, which consisted of 4 nannies and 1 buck with stridor, and group 2, which consisted of 4 nannies and 1 buck without stridor...
July 2017: Veterinary Pathology
https://www.readbyqxmd.com/read/28621211/copper-doping-enhanced-the-oxidative-stress-mediated-cytotoxicity-of-tio2-nanoparticles-in-a549-cells
#5
J Ahmad, M A Siddiqui, M J Akhtar, H A Alhadlaq, A Alshamsan, S T Khan, R Wahab, A A Al-Khedhairy, A Al-Salim, J Musarrat, Q Saquib, M Fareed, M Ahamed
Physicochemical properties of titanium dioxide nanoparticles (TiO2 NPs) can be tuned by doping with metals or nonmetals. Copper (Cu) doping improved the photocatalytic behavior of TiO2 NPs that can be applied in various fields such as environmental remediation and nanomedicine. However, interaction of Cu-doped TiO2 NPs with human cells is scarce. This study was designed to explore the role of Cu doping in cytotoxic response of TiO2 NPs in human lung epithelial (A549) cells. Characterization data demonstrated the presence of both TiO2 and Cu in Cu-doped TiO2 NPs with high-quality lattice fringes without any distortion...
January 1, 2017: Human & Experimental Toxicology
https://www.readbyqxmd.com/read/28617866/characterization-of-trace-metal-content-in-the-developing-zebrafish-embryo
#6
Rebecca T Thomason, Michael A Pettiglio, Carolina Herrera, Clara Kao, Jonathan D Gitlin, Thomas B Bartnikas
Trace metals are essential for health but toxic when present in excess. The maintenance of trace metals at physiologic levels reflects both import and export by cells and absorption and excretion by organs. The mechanism by which this maintenance is achieved in vertebrate organisms is incompletely understood. To explore this, we chose zebrafish as our model organism, as they are amenable to both pharmacologic and genetic manipulation and comprise an ideal system for genetic screens and toxicological studies...
2017: PloS One
https://www.readbyqxmd.com/read/28615814/an-anatomical-study-for-localisation-of-zygomatic-branch-of-facial-nerve-and-masseteric-nerve-an-aid-to-nerve-coaptation-for-facial-reanimation-surgery-a-cadaver-based-study-in-eastern-india
#7
Ratnadeep Poddar, Alipta Bhattacharya, Iman Sinha, Asis Kumar Ghosal
CONTEXT: In cases of chronic facial palsy, where direct neurotisation is possible, ipsilateral masseteric nerve is a very suitable motor donor. We have tried to specifically locate the masseteric nerve for this purpose. AIMS: Describing an approach of localisation and exposure of both the zygomatic branch of Facial nerve and the nerve to masseter, with respect to a soft tissue reference point over face. SETTINGS AND DESIGN: Observational cross sectional study, conducted on 12 fresh cadavers...
January 2017: Indian Journal of Plastic Surgery: Official Publication of the Association of Plastic Surgeons of India
https://www.readbyqxmd.com/read/28613861/methane-oxidation-to-methanol-catalyzed-by-cu-oxo-clusters-stabilized-in-nu-1000-metal-organic-framework
#8
Takaaki Ikuno, Jian Zheng, Aleksei Vjunov, Maricruz Sanchez-Sanchez, Manuel A Ortuño, Dale Pahls, John L Fulton, Donald M Camaioni, Zhanyong Li, Debmalya Ray, B Layla Mehdi, Nigel D Browning, Omar K Farha, Joseph T Hupp, Christopher J Cramer, Laura Gagliardi, Johannes A Lercher
Copper oxide clusters synthesized via atomic layer deposition on the nodes of the metal-organic framework NU-1000 are active for oxidation of methane to methanol under mild reaction conditions. Analysis of chemical reactivity, in situ X-ray absorption spectroscopy, and density functional theory calculations are used to determine structure/activity relations in the Cu-NU-1000 catalytic system. The Cu-loaded MOF contained Cu as clusters of a few atoms each. The Cu was present at ambient conditions as a mixture of ~15 % Cu(+) and ~ 85 % Cu(2+)...
June 14, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28613326/arbuscular-mycorrhizal-fungi-enhance-the-copper-tolerance-of-tagetes-patula-through-the-sorption-and-barrier-mechanisms-of-intraradical-hyphae
#9
Xishi Zhou, Lei Fu, Yan Xia, Luqing Zheng, Chen Chen, Zhenguo Shen, Yahua Chen
Arbuscular mycorrhizal fungi (AMF) are widespread soil fungi that can form endosymbiotic structures with the root systems of most plants and can improve the tolerance of host plants to heavy metals. In the present study, we investigated the effects of AMF (Glomus coronatum) inoculation on the tolerance of Tagetes patula L. to Cu. Almost all of the non-mycorrhizal plants exposed to 100 μM Cu died after 3 d, whereas phytotoxicity was only observed in mycorrhizal plants that were exposed to Cu concentrations greater than 100 μM...
June 14, 2017: Metallomics: Integrated Biometal Science
https://www.readbyqxmd.com/read/28610262/a-new-species-of-i-leptolalax-i-anura-megophryidae-from-vietnam
#10
Jodi J L Rowley, Vinh Q Dau, Trung T Cao
We describe a new, medium-sized Leptolalax species from north central Vietnam. Leptolalax puhoatensis sp. nov. is distinguished from its congeners by a combination of having a body size range of 24.2-28.1 mm in eight adult males and 27.3-31.5 mm in three adult females; distinct dorsolateral markings including blackish spots on the flank and dark canthal and/or temporal streaks; males with a reddish-brown venter, often with faint white dusting and females with a pale pink venter; skin on dorsum with tiny, indistinct, low tubercles in preservative, more distinct and forming low dorsal ridges on dorsal surface in life; toes with webbing basal and narrow lateral fringes; iris copper in upper half and golden in lower half; and a call consisting of a single note and a dominant frequency of 4...
June 1, 2017: Zootaxa
https://www.readbyqxmd.com/read/28604741/a-novel-nuclear-complex-of-drr1-f-actin-and-commd1-involved-in-nf-%C3%AE%C2%BAb-degradation-and-cell-growth-suppression-in-neuroblastoma
#11
P Mu, T Akashi, F Lu, S Kishida, K Kadomatsu
Downregulated in renal cell carcinoma 1 (DRR1) has important roles in tumor cell growth, neuron survival and spine formation, and was recently shown to bind actin. However, the roles of nuclear DRR1 remain largely unexplored. Here, we identified an interaction between filamentous actin (F-actin) and DRR1 in the nucleus, and demonstrated that copper metabolism MURR1 domain-containing 1 (COMMD1) is another binding partner of DRR1. Accordingly, DRR1, F-actin and COMMD1 were shown to form a complex in the nucleus, and the stability of COMMD1 was enhanced in this complex...
June 12, 2017: Oncogene
https://www.readbyqxmd.com/read/28603872/the-effect-of-feed-supplementation-with-a-copper-glycine-chelate-and-copper-sulphate-on-selected-humoral-and-cell-mediated-immune-parameters-plasma-superoxide-dismutase-activity-ceruloplasmin-and-cytokine-concentration-in-broiler-chickens
#12
Ł S Jarosz, A Marek, Z Grądzki, M Kwiecień, B Kaczmarek
The varied bioavailability and different effects of organic forms of copper on the immune system of poultry have prompted the search for new feed additives based on copper compounds containing modified chelate complexes. The aim of the study was to determine the effect of inorganic and organic forms of copper on selected parameters of the cellular and humoral immune response in broiler chickens by determining the percentages of CD3(+) CD4(+) , CD3(+) CD8(+) and CD25(+) lymphocytes, cells with MHC Class II expression, and BU-1(+) cells, as well as the concentrations of SOD, IL-2, IL-10 and TNF-α in the peripheral blood...
June 12, 2017: Journal of Animal Physiology and Animal Nutrition
https://www.readbyqxmd.com/read/28599235/a-digital-image-method-of-spot-tests-for-determination-of-copper-in-sugar-cane-spirits
#13
Kenia Dias Pessoa, Willian Toito Suarez, Marina Ferreira Dos Reis, Mathews de Oliveira Krambeck Franco, Renata Pereira Lopes Moreira, Vagner Bezerra Dos Santos
In this work the development and validation of analytical methodology for determination of copper in sugarcane spirit samples is carried out. The digital image based (DIB) method was applied along with spot test from the colorimetric reaction employing the RGB color model. For the determination of copper concentration, it was used the cuprizone - a bidentate organic reagent - which forms with copper a blue chelate in an alkaline medium. A linear calibration curve over the concentration range from 0.75 to 5...
May 31, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28592362/toxoplasma-gondii-apoptosis-and-cellular-division-alterations-after-in-vitro-treatment-with-copper-ii-complexes
#14
J A Portes, C S Motta, N F Azeredo, C Fernandes, A Horn, W De Souza, R A DaMatta, S H Seabra
Toxoplasma gondii is the causative agent of toxoplasmosis, which is one of the most common parasitic diseases in the world. Toxoplasmosis causes severe damage to immunocompromised hosts, and the most frequently used therapy is the combination of pyrimethamine and sulfadiazine, which has side effects. Thus, there is a need for new therapies that target T. gondii. Herein, we present the anti-Toxoplasma effect of two new copper(II) complexes: [(H2L1) Cu (μ-Cl)2 Cu(H2L1)] Cl2·5H2O (1) and [(H2L2) Cu (μ-Cl)2 Cu(H2L2)] Cl2·6H2O (2)...
April 20, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28590730/three-coordinate-copper-ii-aryls-key-intermediates-in-c-o-bond-formation
#15
Subrata Kundu, Christine Greene, Kamille D Williams, Tolani K Salvador, Jeffery A Bertke, Thomas R Cundari, Timothy H Warren
Copper(II) aryl species have been proposed as key intermediates in copper-catalyzed cross coupling reactions. Novel three coordinate copper(II) aryls [Cu(II)]-C6F5 supported by ancillary β-diketiminate ligands form in reactions between copper(II) alkoxides [Cu(II)]-O(t)Bu and B(C6F5)3. Crystallographic, spectroscopic, and DFT studies reveal the geometric and electronic structures of these unusual copper(II) organometallic complexes. Reaction of [Cu(II)]-C6F5 with the free radical NO(g) results in C-N bond formation to give [Cu](η(2)-ONC6F5)...
June 7, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28590560/routine-provision-of-intrauterine-contraception-at-elective-cesarean-section-in-a-national-public-health-service-a-service-evaluation
#16
Rebecca Heller, Anne Johnstone, Sharon T Cameron
INTRODUCTION: We conducted a prospective health service evaluation to assess the feasibility and acceptability of routinely offering insertion of intrauterine contraception (IUC) at cesarean section in a maternity setting in the UK. MATERIAL AND METHODS: One month before scheduled cesarean section, women were sent information about postpartum contraception including the option of insertion of IUC at cesarean. Women choosing IUC (copper intrauterine device or levonorgestrel intrauterine system) were followed up in person at six weeks; telephone contact was made at three, six and 12 months postpartum...
June 7, 2017: Acta Obstetricia et Gynecologica Scandinavica
https://www.readbyqxmd.com/read/28581770/collimated-propagation-of-fast-electron-beams-accelerated-by-high-contrast-laser-pulses-in-highly-resistive-shocked-carbon
#17
X Vaisseau, A Morace, M Touati, M Nakatsutsumi, S D Baton, S Hulin, Ph Nicolaï, R Nuter, D Batani, F N Beg, J Breil, R Fedosejevs, J-L Feugeas, P Forestier-Colleoni, C Fourment, S Fujioka, L Giuffrida, S Kerr, H S McLean, H Sawada, V T Tikhonchuk, J J Santos
Collimated transport of ultrahigh intensity electron current was observed in cold and in laser-shocked vitreous carbon, in agreement with simulation predictions. The fast electron beams were created by coupling high-intensity and high-contrast laser pulses onto copper-coated cones drilled into the carbon samples. The guiding mechanism-observed only for times before the shock breakout at the inner cone tip-is due to self-generated resistive magnetic fields of ∼0.5-1  kT arising from the intense currents of fast electrons in vitreous carbon, by virtue of its specific high resistivity over the range of explored background temperatures...
May 19, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28576871/steap4-its-emerging-role-in-metabolism-and-homeostasis-of-cellular-iron-and-copper
#18
Rachel T Scarl, C Martin Lawrence, Hannah M Gordon, Craig S Nunemaker
Preserving energy homeostasis in the presence of stressors such as proinflammatory cytokines and nutrient overload is crucial to maintaining normal cellular function. Six-transmembrane epithelial antigen of the prostate 4 (STEAP4), a metalloreductase involved in iron and copper homeostasis, is thought to play a potentially important role in the cellular response to inflammatory stress. Genome-wide association studies have linked various mutations in STEAP4 with the development of metabolic disorders such as obesity, metabolic syndrome, and type 2 diabetes...
June 2, 2017: Journal of Endocrinology
https://www.readbyqxmd.com/read/28573653/trace-elements-in-patients-on-continuous-renal-replacement-therapy
#19
M Broman, A Bryland, O Carlsson
PURPOSE: Intensive care patients with acute kidney injury (AKI), treated with continuous renal replacement therapy (CRRT) are at great risk for disturbances in plasma levels of trace elements due to the underlying illness, AKI, and dialysis. This study was performed to increase our knowledge regarding eight different trace elements during CRRT. METHODS: Thirty one stable patients with AKI, treated with CRRT, were included in the study. Blood, plasma and effluent samples were taken at the start of the study and 36 ± 12 h later...
July 2017: Acta Anaesthesiologica Scandinavica
https://www.readbyqxmd.com/read/28573291/mechanisms-of-iron-and-copper-frataxin-interactions
#20
T H L Han, J M Camadro, R Santos, E Lesuisse, J M El Hage Chahine, N T Ha-Duong
Frataxin is a mitochondrial protein whose deficiency is the cause of Friedreich's ataxia, a hereditary neurodegenerative disease. This protein plays a role in iron-sulfur cluster biosynthesis, protection against oxidative stress and iron metabolism. In an attempt to provide a better understanding of the role played by metals in its metabolic functions, the mechanisms of mitochondrial metal binding to frataxin in vitro have been investigated. A purified recombinant yeast frataxin homolog Yfh1 binds two Cu(ii) ions with a Kd1(Cu(II)) of 1...
June 2, 2017: Metallomics: Integrated Biometal Science
keyword
keyword
104174
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"