Search results for "Reaction"

Pathogenese und Diagnostik der Cytomegalovirus-Infektion

2008

Brenneria quercina and Serratia spp. isolated from Spanish oak trees Molecular characterization and development of PCR primers

2008

Brenneria quercina has been reported as one of the causal agents of oak decline in Spain. To investigate the bacterial variability of this pathogen from different Spanish oak forests, a collection of 38 bacterial isolates from seven geographic locations and from different oak species was analysed by sequencing 16S rDNA and rep-PCR fingerprinting. All Spanish isolates of B. quercina were grouped by rep-PCR into a homogenous cluster that differed significantly from B. quercina reference strains from California. 16S rDNA analysis revealed that 34 out of 38 isolates were Brenneria. However, four isolates belonged to the genus Serratia, suggesting that this bacterium could cause cankers in oak t…

Association with the Syndrome "Basses Richesses" of Sugar Beet of a Phytoplasma and a Bacterium-Like Organism Transmitted by a Pentastiridius sp.

2002

The syndrome “basses richesses” of sugar beet (SBR) was first observed in 1991 in Burgundy, France. A cixiid planthopper, Pentastiridius beieri, has been proved to be involved in the transmission to sugar beet of a stolbur phytoplasma, which could be detected in some affected plants. In 2000, periwinkle and sugar beet exposed to field-collected cixiids developed symptoms similar to SBR on sugar beet. Use of 4′-6-diamidino-2-phenylindole (DAPI) staining and transmission electron microscopy confirmed the presence of phytoplasma in some of the plants, which were also positive for this pathogen in a polymerase chain reaction (PCR) analysis. A phloem-restricted gram-negative bacteria was seen i…

Direct electrochemical generation of organic carbonates by dehydrogenative coupling.

2018

Organic carbonates are an important source for polycarbonate synthesis. However, their synthesis generally requires phosgene, sophisticated catalysts, harsh reaction conditions, or other highly reactive chemicals. We present the first direct electrochemical generation of mesityl methyl carbonate by C–H activation. Although this reaction pathway is still challenging concerning scope and efficiency, it outlines a new strategy for carbonate generation.

Gold-Catalyzed Suzuki Coupling of ortho -Substituted Hindered Aryl Substrates

2017

International audience; A method that allows hindered ortho-substituted aryl iodides to be efficiently coupled to phenylboronic acid using a gold-catalyzed C-C bond formation is presented. The use of a molecularly-defined dinuclear gold chloride catalytic precursor that is stabilized by a new tetradentate (N,N')-diamino-(P,P')-diphosphino ferrocene hybrid ligand in a Suzuki-type reaction is described for the first time. Electron-rich isopropyl groups on phosphorus were found essen-tial for a superior activity, while the performances of a set of analogous gold dinuclear complexes that were fully characterized by multinuclear NMR spectroscopy and XRD analysis, were investigated. Therefore, ar…

Anesthesia for Euthanasia Influences mRNA Expression in Healthy Mice and after Traumatic Brain Injury

2014

Tissue sampling for gene expression analysis is usually performed under general anesthesia. Anesthetics are known to modulate hemodynamics, receptor-mediated signaling cascades, and outcome parameters. The present study determined the influence of anesthetic paradigms typically used for euthanization and tissue sampling on cerebral mRNA expression in mice. Naïve mice and animals with acute traumatic brain injury induced by controlled cortical impact (CCI) were randomized to the following euthanasia protocols (n=10-11/group): no anesthesia (NA), 1 min of 4 vol% isoflurane in room air (ISO), 3 min of a combination of 5 mg/kg midazolam, 0.05 mg/kg fentanyl, and 0.5 mg/kg medetomidine intraperi…

Cellul�re Immunreaktionen gegen�ber homologen leberspezifischen Antigenen (HLP) bei chronischen Leberentz�ndungen

1974

Es wird eine Zweiphasentechnik des Leukocyten-Migrations-Inhibitionstestes beschrieben und zum Nachweis einer cellularen Immunreaktion gegenuber Leberantigenen bei chronisch-entzundlichen Lebererkrankungen eingesetzt. Mit dieser Technik wurde bei 85% der Patienten mit hypergammaglobulinamischer Verlaufsform einer chronisch-aktiven Hepatitis und 42% der Patienten mit aktiv fortschreitenden kryptogenen Lebercirrhosen eine Migrationshemmung nachgewiesen. Lebergesunde Kontrollen zeigten keine, Patienten mit dem Zustand nach Hepatitis und chronisch-persistierender Hepatitis selten eine Leukocytenmigrationsinhibition gegenuber leberspezifischen Antigenen. 17% der Patienten mit chronisch-aktiver H…

Photokinetic examination of (Z,E,E)-4,4′-distyrylazobenzene

1995

Abstract 4,4′-Distyrylazobenzenes demonstrate a photokinetic equilibrium and a superimposed thermal backward reaction in which the absorption coefficient of one of the partners in the equilibrium is principally unknown. Using the dependence of the photostationary state on the irradiation intensity, the photochemical quantum yields ϕ 1 A and ϕ 2 B were determined, as well as the thermal rate constant k , as a function of the irradiation and observation wavelengths. Experimental difficulties and the wavelength dependence of ϕ 1 A and ϕ 2 B are discussed.

Pretreatment T790M mutation detection by ultrasensitive PCR assay as predictor of efficacy in non-small lung cancer (NSCLC) patients treated with 1st…

2019

Oral manifestations and dental management of patient with leukocyte alterations

2011

Leukocytes are the main cellular elements of inflammatory and immune reactions of the organism. Leukocyte alterations are the consequence of an imbalance between the formation of leukocytes in the bone marrow and its elimination by the mononuclear phagocytic system. Factors that can modify leukopoyesis are varied and can lead to an alteration in the number of leukocytes or tumoral alterations of white cells (leukemias, lymphomas and plasma cell tumors). There is also a wide range of clinical manifestations that can derive from them: from very slight symptoms to life-threatening conditions. In some cases oral manifestations will be the first signs and it will be the dentist’s responsibility …