Home About us Contact
|
Home About us Contact | ||
|
|
||
Monoxide
Kinds of Monoxide Terms modified by Monoxide Selected AbstractsPROPOSED NEW COLOR RETENTION METHOD FOR TILAPIA FILLETS (O. NILOTICUS, × O. AUREUS,) BY EUTHANATIZING WITH REDUCED CARBON MONOXIDEJOURNAL OF FOOD PROCESSING AND PRESERVATION, Issue 5 2008LAIHAO LI ABSTRACT The conditions of color retention for tilapia fillets (O. niloticus, × O. aureus,) treated by euthanatizing with reduced carbon monoxide (CO) were investigated. Live tilapias were first exposed to water saturated with CO. After a certain amount of CO-saturated water had been pumped through the gills, the tilapias were timely picked out and killed following the industry guidelines. The color value of fillets was measured by colorimeter to evaluate the color retention. The results showed that (1) temperature did not have a significant effect on the color of the fillets; (2) the optimal conditions were a ratio of 3:1, v/w between water and fish, a CO flow rate of 80 mL/min and 10 min CO injection followed by 5 min air exposure. Under these conditions, a higher a*value (redness 19.44) and a better sensory evaluation value (4.8) were obtained; and (3) the proposed method shortened processing time by 30,35 min, reduced the frequency of sterilization to only once, significantly lowered microbial counts from 82.33 × 102 to 56.33 × 102 and reduced the CO requirement 25-fold, which has significant occupation, health, safety, and environmental implications. PRACTICAL APPLICATIONS Color retention for tilapias is conventionally accomplished by treating fillets with CO. Recently, euthanatizing tilapias with CO has been assumed to be an effective way to shorten processing time and to lessen product handling process. Many factories have been searching for a way to solve the problem of color retention for tilapias or other red muscle treatment, but there has been a lack of information on how euthanasia affects fish quality, especially red muscle color. The objective of this experiment was to explore the application of the new method. [source] Novel Cs -Symmetric 1,4-Diphosphine Ligands in the Copolymerization of Propene and Carbon Monoxide: High Regio- and Stereocontrol in the Catalytic PerformanceHELVETICA CHIMICA ACTA, Issue 2 2005Antonella Leone New Cs -symmetric aryl 1,4-diphosphine ligands were synthesized and tested in the copolymerization of carbon monoxide and propene. The electronic properties of the two different P-atoms did not affect the high enantioselectivity of the catalyst precursors, thus resulting in high ,regio'- and ,stereoregular' copolymers. [source] Cobalt/Rhodium Heterobimetallic Nanoparticle-Catalyzed Oxidative Carbonylation of Amines in the Presence of Carbon Monoxide and Molecular Oxygen to UreasADVANCED SYNTHESIS & CATALYSIS (PREVIOUSLY: JOURNAL FUER PRAKTISCHE CHEMIE), Issue 9 2009Ji Hoon Park Abstract An environmentally friendly oxidative carbonylation of aliphatic and aromatic primary amines to ureas has been successfully achieved in the presence of a catalytic amount of cobalt/rhodium heterobimetallic nanoparticles without any promoters. The catalyst system could be reused with only a slight loss of catalytic activity. [source] An Efficient Rhodium-Catalyzed Double Hydroaminocarbonylation of Alkynes with Carbon Monoxide and Amines Affording 1,4-Diamide DerivativesADVANCED SYNTHESIS & CATALYSIS (PREVIOUSLY: JOURNAL FUER PRAKTISCHE CHEMIE), Issue 6 2007Qiufeng Huang Abstract The hydroaminocarbonylation of terminal alkynes with carbon monoxide and pyrrolidine or piperidine catalyzed by rhodium complexes affords 1,4-diamide derivatives in good to high yields. [source] Carbon Monoxide has Antioxidative Properties in the Liver Involving p38 MAP Kinase Pathway in a Murine Model of Systemic InflammationMICROCIRCULATION, Issue 7 2010JÜRGEN BRUGGER Please cite this paper as: Brugger, Schick, Brock, Baumann, Muellenbach, Roewer and Wunder (2010). Carbon Monoxide has Antioxidative Properties in the Liver Involving p38 MAP Kinase Pathway in a Murine Model of Systemic Inflammation. Microcirculation17(7), 504,513. Abstract Objective:, Reactive oxygen species (ROS) are important in the hepatocellular injury process during a systemic inflammation. We examined the role of carbon monoxide (CO) on the hepatic generation of ROS with in-vivo and in-vitro models of systemic inflammation. Methods:, Using a murine model of bilateral hindlimb ischemia-reperfusion (I/R) we examined the effect of CO treatment on hepatic ROS formation, oxidative status, and cell injury. Cultured HUVEC were used to investigate intracellular pathways. Results:, CO treatment reduced hepatic lipid peroxidation, re-established total hepatic glutathione and glutathione disulfide (GSH/GSSG) levels and reduced hepatocellular injury. Inhibition of heme oxygenase (HO) during treatment with CO during hindlimb I/R failed to alter the antioxidant qualities provided by CO. The production of ROS after tumor necrosis factor-, (TNF-,) stimulation in HUVEC was diminished after exposure to CO. Treatment with CO during HO inhibition reduced both ROS formation and cell injury. Inhibiting the p38 MAPK (mitogen-activated protein kinase) pathway with pyridinyl imidazol (SB203580) revealed that the antioxidant potential of CO involved the activation of p38 MAPK. Conclusions:, CO has direct antioxidant potential independently of any HO activity during systemic inflammation. The antioxidant effects afforded by CO involve the activation of the p38 MAPK pathway. [source] Ex vivo Application of Carbon Monoxide in UW Solution Prevents Transplant-Induced Renal Ischemia/Reperfusion Injury in PigsAMERICAN JOURNAL OF TRANSPLANTATION, Issue 4 2010J. Yoshida I/R injury is a major deleterious factor of successful kidney transplantation (KTx). Carbon monoxide (CO) is an endogenous gaseous regulatory molecule, and exogenously delivered CO in low concentrations provides potent cytoprotection. This study evaluated efficacies of CO exposure to excised kidney grafts to inhibit I/R injury in the pig KTx model. Porcine kidneys were stored for 48 h in control UW or UW supplemented with CO (CO-UW) and autotransplanted in a 14-day follow-up study. In the control UW group, animal survival was 80% (4/5) with peak serum creatinine levels of 12.0 ± 5.1 mg/dL. CO-UW showed potent protection, and peak creatinine levels were reduced to 6.9 ± 1.4 mg/dL with 100% (5/5) survival without any noticeable adverse event or abnormal COHb value. Control grafts at 14 days showed significant tubular damages, focal fibrotic changes and numerous infiltrates. The CO-UW group showed significantly less severe histopathological changes with less TGF-, and p-Smad3 expression. Grafts in CO-UW also showed significantly lower early mRNA levels for proinflammatory cytokines and less lipid peroxidation. CO in UW provides significant protection against renal I/R injury in the porcine KTx model. Ex vivo exposure of kidney grafts to CO during cold storage may therefore be a safe strategy to reduce I/R injury. [source] Rhodium-Catalyzed Pauson,Khand-Type Reaction Using Alcohol as a Source of Carbon Monoxide,ANGEWANDTE CHEMIE, Issue 30 2010Hoon Park Drei mechanistisch unterschiedliche Reaktionen werden bei der neuartigen katalytischen intramolekularen Auto-Tandem-Synthese bicyclischer Cyclopentenone aus Eninen in Alkohol in Gegenwart eines Rhodiumkatalysators kombiniert: eine Alkoholoxidation, eine Aldehyddecarbonylierung und eine carbonylierende [2+2+1]-Cycloaddition (siehe Schema; dppp=Propan-l,3-diylbis(diphenylphosphan)). [source] Titelbild: Sensitive and Selective Chromogenic Sensing of Carbon Monoxide by Using Binuclear Rhodium Complexes (Angew. Chem.ANGEWANDTE CHEMIE, Issue 29 201029/2010) Wie in einer Collage von Max Ernst kann die Kombination einer bereits bekannten molekularen Einheit (ein zweikerniger Rhodiumkomplex) mit geeigneten Brückenliganden eine neue Rolle ergeben , hier als chromogene Chemosensoren. R. Martínez-Máñez et,al. beschreiben in ihrer Zuschrift auf S.,5054,ff., wie diese Komplexe durch ihre Farbänderung als Kohlenmonoxidsensoren wirken können. [source] Sensitive and Selective Chromogenic Sensing of Carbon Monoxide by Using Binuclear Rhodium Complexes,ANGEWANDTE CHEMIE, Issue 29 2010Julio Esteban Dr. CO-Fänger: Kohlenmonoxid kann mit dem zweikernigen Rhodiumkomplex cis -[Rh2(C6H4PPh2)2(O2CCH3)2](HO2CCH3)2 selektiv und empfindlich nachgewiesen werden. Der Komplex, der zwei cyclometallierte Phosphanliganden enthält, koordiniert CO axial und ändert dabei seine Farbe von Violett nach Orangegelb (siehe Bild). [source] Carbon Monoxide as a Promoter for its own Oxidation on a Gold Electrode,ANGEWANDTE CHEMIE, Issue 7 2010Paramaconi Rodríguez Dr. Treffpunkt Gold: Das vorgestellte Modell für die CO-Oxidation an Goldelektroden in alkalischem Medium geht davon aus, dass das CO die Adsorption des Oxidationsmittels verstärkt. Dies erklärt die Reaktionsordnung von größer 1 und die Beobachtung, dass gelöstes CO leichter oxidiert wird als adsorbiertes CO. DFT-Rechnungen bestätigen, dass CO und OH jeweils die Bindung des anderen Adsorbats auf Au(111) verstärken. C,schwarz, O,rot, H,grau. [source] Sonochemical Disproportionation of Carbon Monoxide in Water: Evidence for Treanor Effect during Multibubble Cavitation,ANGEWANDTE CHEMIE, Issue 50 2009Sergey Nichtgleichgewichts-Sonochemie: Die Disproportionierung von CO in Wasser bei Ultraschallbehandlung führt zur Bildung eines hydratisierten Kohlenstoffsuboxid-Polymers (C3O2)n (siehe Bild), in dem das schwere Isotop 13C angereichert ist. Diese Beobachtung spricht für das Vorliegen von CO-Molekülen in angeregten Schwingungszuständen mit einer Treanor-Nichtgleichgewichtsverteilung im Bläscheninneren. [source] Reduction of Transition-Metal-Coordinated Carbon Monoxide by a Rare-Earth Hydride Cluster: Isolation of Well-Defined Heteromultimetallic Oxycarbene, Oxymethyl, Carbene, and Methyl Complexes,ANGEWANDTE CHEMIE, Issue 42 2009Yasumasa Takenaka Dr. Der vierkernige Yttrium-Polyhydrid-Komplex 1 reduziert koordiniertes CO in Übergangsmetallkomplexen unter Bildung neuartiger Oxycarben-, Oxymethyl-, Carbenoxo- und Methyloxo-Heterometallkomplexe (siehe Schema). Das Reaktionsmuster hängt von der Art der Übergangsmetallcarbonylkomplexe ab. [source] ChemInform Abstract: Ionic Liquids as Solvents for a Ruthenium-Catalyzed C,H Activation Reaction: Synthesis of Heterocyclic Compounds from ,,,-Unsaturated Imines, Carbon Monoxide, and Ethylene.CHEMINFORM, Issue 36 2010Tobias Biletzki Abstract The influence of reaction conditions (ionic liquid, pressure, temperature, time) on outcome and product ratio is studied. [source] ChemInform Abstract: 2-(2,2,2-Trifluoroethylidene)-1,3-dithiane Monoxide as a Trifluoromethylketene Equivalent.CHEMINFORM, Issue 40 2009Suguru Yoshida Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source] ChemInform Abstract: Palladium-Catalyzed Cyclization of 3-Bromopyridine-4-carbaldehyde with Carbon Monoxide and Carboxylic Acids.CHEMINFORM, Issue 5 2009Chan Sik Cho Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source] ChemInform Abstract: One-Pot Direct Synthesis of Thiocarbamates from Aniline, Carbon Monoxide, and Thiols Catalyzed by Selenium.CHEMINFORM, Issue 9 2008Xiaopeng Zhang Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source] The Pure Rotational Spectrum of the Actinide-Containing Compound Thorium Monoxide.CHEMINFORM, Issue 45 2007Christopher T. Dewberry Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF. [source] Cobalt,Rhodium Heterobimetallic Nanoparticle-Catalyzed Synthesis of ,,,-Unsaturated Amides from Internal Alkynes, Amines, and Carbon Monoxide.CHEMINFORM, Issue 43 2007Ji Hoon Park Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF. [source] Carbon Monoxide Has Direct Toxicity on the Myocardium Distinct from Effects of Hypoxia in an Ex Vivo Rat Heart ModelACADEMIC EMERGENCY MEDICINE, Issue 1 2008Selim Suner MD Abstract Objectives:, Carbon monoxide (CO) toxicity causes significant central nervous system and cardiac injury. Although the neurological damage caused by CO toxicity is extensively described, the mechanisms underlying myocardial insult are unclear. The authors used an externally perfused isolated rat heart model to examine the effects of a physiological saline solution (Krebs Henseleit HEPES, KHH) aerated with CO on cardiac function. Methods:, Fifteen rats were equally divided into three groups: the control group (KHH + 100% O2), the nitrogen control group (KHH + 70% O2, 30% N2), and the CO group (KHH + 70% oxygen, 30% CO). Left ventricular peak systolic pressure (LVPsP), end diastolic pressure (LVEdP), and coronary perfusion pressure were measured while the isolated heart was paced and perfused on a modified Langendorf apparatus. Results:, Left ventricular generated pressure (LVGP = LVPsP , LVEdP) decreased in the nitrogen control and CO groups compared to the control group. There was higher LVGP in the recovery phase between the nitrogen control group compared to the CO group. Both groups had increased lactic acid levels in the experimental phase. Conclusions:, Carbon monoxide with hypoxia and hypoxemic hypoxia both result in similar depression of cardiac function. Hearts poisoned with CO with hypoxia do not recover function to the extent that hearts rendered hypoxic with nitrogen do when perfused with 100% oxygen after the insult. This suggests that CO causes direct myocardial toxicity distinct from the effects of hypoxia. [source] A Facile Method for the Synthesis of 1,3-Oxathiolan-2-ones by Reaction of Oxiranes, Sulfur, and Carbon Monoxide.CHEMINFORM, Issue 43 2006Yutaka Nishiyama Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF. [source] A New Method for the Synthesis of 2-Aryl-1H-benzimidazoles: Selenium-Catalyzed Reductive N-Heterocyclization of Benzylidene(2-nitroaryl)amines with Carbon Monoxide.CHEMINFORM, Issue 19 2006Yutaka Nishiyama Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF. [source] Palladium-Catalyzed Ring Opening of Isoprene Monoxide with Nitrogen Nucleophiles , Asymmetric Synthesis of Branched Amino Sugars.CHEMINFORM, Issue 18 2006Barry M. Trost Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF. [source] Solvent-Assisted Thiocarboxylation of Amines and Alcohols with Carbon Monoxide and Sulfur under Mild Conditions.CHEMINFORM, Issue 52 2005Takumi Mizuno Abstract For Abstract see ChemInform Abstract in Full Text. [source] A New and Facile Route for the Synthesis of Thiocarbamates from Aniline, Carbon Monoxide, and Thiols Mediated by Selenium.CHEMINFORM, Issue 36 2005Xiaopeng Zhang No abstract is available for this article. [source] Practical Synthesis of S-Alkyl Thiocarbamate Herbicides by Carbonylation of Amines with Carbon Monoxide and Sulfur.CHEMINFORM, Issue 28 2004Takumi Mizuno Abstract For Abstract see ChemInform Abstract in Full Text. [source] Carbonylation of Lithium Enolates with Carbon Monoxide Mediated by Selenium.CHEMINFORM, Issue 24 2004Shin-ichi Fujiwara Abstract For Abstract see ChemInform Abstract in Full Text. [source] A Novel Photoinduced Reduction System of Low-Valent Samarium Species: Reduction of Organic Halides and Chalcogenides, and Its Application to Carbonylation with Carbon Monoxide.CHEMINFORM, Issue 16 2004Yukihito Sumino Abstract For Abstract see ChemInform Abstract in Full Text. [source] High Activity of Pt/AlPO4 Catalyst for Selective Catalytic Reduction of Nitrogen Monoxide by Propene in Excess Oxygen.CHEMINFORM, Issue 47 2003Ryuta Fujii Abstract For Abstract see ChemInform Abstract in Full Text. [source] Oxidative Methoxycarbonylation of Propyne and Allene with Carbon Monoxide and Methanol in the Presence of Copper-Palladium Catalyst.CHEMINFORM, Issue 18 2003A. G. Mal'kina No abstract is available for this article. [source] Catalytic One-Pot Synthesis of N-Phenyl Alkyl Amides from Alkene and Aniline in the Presence of Cobalt on Charcoal under Carbon Monoxide.CHEMINFORM, Issue 40 2002Sang Ick Lee Abstract For Abstract see ChemInform Abstract in Full Text. [source] | ||||||||||||||||||||||||||||||||||||||||||||||