Search results for "amine"

Incidence and clinical importance of perioperative histamine release: randomised study of volume loading and antihistamines after induction of anaest…

1994

Although histamine release is recognised as a common event during anaesthesia and surgery, few clinicians judge the resultant cardiorespiratory disturbances serious enough to warrant prophylaxis with antihistamines. We have assessed the incidence and importance of histamine release in a randomised 2 x 2 factorial study. 240 patients representing a routine throughput of major general surgery were studied during a standardised induction of anaesthesia and preoperative loading of the circulation with either Ringer solution or Haemaccel-35, with or without antihistamine prophylaxis with dimetindene (H1) plus cimetidine (H2). Cardiorespiratory disturbances were graded as detectable, clinically r…

The complex formation of tetracyclohexylammonium C1-resorcinarene with various guests - an electrospray ionization Fourier transform ion cyclotron re…

2008

The complex formation of a tetraammonium C1-resorcinarene (R+4HCl) was studied using electrospray ionization Fourier transform ion cyclotron resonance (ESI-FTICR) mass spectrometry. Although R+4HCl easily loses its counter ions in the ESI process, a neutral self-assembled structure with an intramolecular circular hydrogen-bonded 16-membered -N(+)-H ... X(-) ... H-N(+)- array with ammonium ion as the charge-giving species was observed in the gas phase. In addition to chloride, several other counter ions were also studied. The size and basicity of the counter ion as well as the size of the charge-giving cation strongly affected the gas-phase stability of the self-assembled system. H/D exchang…

Systematic study of SYBR green chromophore reveals major improvement with one heteroatom difference

2021

Five nucleic acid binding cyanine dyes were synthesized and their photophysical properties were evaluated. Changing a single heteroatom in the chromophore causes major differences both in brightness and photostability between the dyes. With such alteration, the brightness of the chromophore increased two-fold compared to the one found in SYBR Green I.

Emerging dynamics in surfactant-based liquid mixtures: octanoic acid/bis(2-ethylhexyl) amine systems.

2012

This work focuses on the dynamic phenomena emerging in self-assembled transient intermolecular networks formed when two different surfactants are mixed. In particular, the relaxation processes in liquid mixtures composed by bis(2-ethylhexyl)amine (BEEA) and octanoic acid (OA) in the whole composition range has been investigated by dielectric spectroscopy and Brillouin spectroscopy. A thorough analysis of all the experimental data consistently suggests that, mainly driven by acid-base interactions arising when the two surfactants are mixed, supra-molecular aggregates formation causes the slowing down of molecular dynamics. This, in turn, reflects to longer-range relaxations. These changes ha…

Improving sensitivity in simultaneous determination of copper carboxylates by nonaqueous capillary electrophoresis

2005

Abstract A new method of nonaqueous capillary electrophoresis (NACE) with UV spectrophotometric detection was developed and optimized for the simultaneous determination of seven carboxylates (trans-1,2-diaminocyclohexane-N,N,N′,N′-tetraacetic acid (CDTA), diethylenetriaminepentaacetic acid (DTPA), ethylenediaminetetraacetic acid (EDTA), N-(2-hydroxyethyl)ethylenediamine-N,N′,N′-triacetic acid (HEDTA), nitrilotriacetic acid (NTA), 1,3-diaminopropane-N,N,N′,N′-tetraacetic acid (PDTA) and triethylenetetraaminehexaacetic acid (TTHA)) as copper complexes. The method development was carried out by using a fused silica capillary. Background electrolyte (BGE) was optimized and the best separation a…

Brunner syndrome associated MAOA dysfunction in human dopaminergic neurons results in NMDAR hyperfunction and increased network activity

2020

AbstractBackgroundMonoamine neurotransmitter abundance affects motor control, emotion, and cognitive function and is regulated by monoamine oxidases. Amongst these, monoamine oxidase A (MAOA) catalyzes the degradation of dopamine, norepinephrine, and serotonin into their inactive metabolites. Loss-of-function mutations in the X-linked MAOA gene cause Brunner syndrome, which is characterized by various forms of impulsivity, maladaptive externalizing behavior, and mild intellectual disability. Impaired MAOA activity in individuals with Brunner syndrome results in bioamine aberration, but it is currently unknown how this affects neuronal function.MethodsWe generated human induced pluripotent s…

Kohtaaminen Martin Buberin ja Carl Rogersin tuotannossa

2016

Heinonen, Noora. 2016. Kohtaaminen Martin Buberin ja Carl Rogersin tuotannossa. Kasvatustieteen pro gradu – tutkielma. Jyväskylän yliopisto. Opettajankoulutuslaitos. 72 sivua. Tutkimuksen tavoitteena on selvittää, miten kohtaaminen määrittyy eksistentiaalifilosofi Martin Buberin ja psykologi ja psykoterapeutti Carl Rogersin tuotannossa. Valitsin tutkimukseeni nämä kaksi ohjauksen alaan merkittävästi vaikuttanutta ajattelijaa, koska he ovat käsitelleet kohtaamista laaja-alaisesti. Halusin lähteä tutkimaan, mikä nousee olennaisimpana esiin heidän kohtaamisajattelussaan, lisäksi, mitä yhteistä ja mitä mahdollisia eroavuuksia on löydettävissä Martin Buberin ja Carl Rogersin teoksista kohtaamise…

Näkymättömästä oppilaasta sinäksi : tapaustutkimus avoimen kohtaamisen vaikutuksista opettajan ja oppilaan välisessä suhteessa

1998

Budesonide/formoterol maintenance and reliever therapy: a new treatment approach for adult patients with asthma.

2007

An inhaled corticosteroid (ICS) or an ICS/long-acting beta(2)-agonist (LABA) combination plus short-acting beta(2)-agonist (SABA) as needed for symptom relief is recommended for persistent asthma. Additionally, budesonide/formoterol maintenance and reliever therapy (Symbicort SMART, AstraZeneca, Sweden) has been approved for adults in the European Union. This option is well tolerated and offers greater reductions in asthma exacerbations together with similar improvements in daily symptom control, at a lower overall steroid load, compared with fixed-dose ICS/LABA plus SABA.Two large clinical trials investigated the use of budesonide/formoterol as maintenance and reliever compared with medium…

Overall asthma control: the relationship between current control and future risk.

2009

Background Asthma guidelines emphasize both maintaining current control and reducing future risk, but the relationship between these 2 targets is not well understood. Objective This retrospective analysis of 5 budesonide/formoterol maintenance and reliever therapy (Symbicort SMART Turbuhaler ∗ ∗Symbicort SMART and Turbuhaler are trademarks owned by AstraZeneca. Neither the Symbicort SMART posology nor the dry powder formulation Turbuhaler are currently approved in the United States.) studies assessed the relationship between asthma control questionnaire (ACQ-5) and Global Initiative for Asthma-defined clinical asthma control and future risk of instability and exacerbations. Methods The perc…