Development of double cylindrical dielectric barrier discharge ion source.
Summary of "Development of double cylindrical dielectric barrier discharge ion source."
This paper deals with the dielectric barrier discharge (DBD) ion source composed of the outer cylindrical dielectric tube and the inner grounded metallic tube electrode. The sample gas is supplied through the inner ceramic tube. In this ion source, the DBD plasma is localized in the DBD tube so that the sample gases can be ionized just outside of the ceramic tube by the DBD excited helium gas without being exposed in the plasma jet. Besides, ambient air does not take part in the ionization of the sample vapor because ionization takes place inside the DBD ion source. Thus, this method is totally free from contaminants in ambient air. It was found that this ion source is capable of soft, high-sensitivity, and reproducible ionization. Application of this technique to the analysis of methamphetamine, carbaryl and basil leaf was given.
Clean Energy Research Center, University of Yamanashi, 4-3-11 Takeda, Kofu, Yamanashi 400-8511, Japan. email@example.com.
This article was published in the following journal.
Name: The Analyst
Medical and Biotech [MESH] Definitions
A technique of measuring the dielectric properties of materials, which vary over a range of frequencies depending on the physical properties of the material. The technique involves measuring, over a range of frequencies, ELECTRICAL IMPEDANCE and phase shift of an electric field as it passes through the material.
The barrier between the perineurium of PERIPHERAL NERVES and the endothelium (ENDOTHELIUM, VASCULAR) of endoneurial CAPILLARIES. The perineurium acts as a diffusion barrier, but ion permeability at the blood-nerve barrier is still higher than at the BLOOD-BRAIN BARRIER.
The property of blood capillary ENDOTHELIUM that allows for the selective exchange of substances between the blood and surrounding tissues and through membranous barriers such as the BLOOD-AIR BARRIER; BLOOD-AQUEOUS BARRIER; BLOOD-BRAIN BARRIER; BLOOD-NERVE BARRIER; BLOOD-RETINAL BARRIER; and BLOOD-TESTIS BARRIER. Small lipid-soluble molecules such as carbon dioxide and oxygen move freely by diffusion. Water and water-soluble molecules cannot pass through the endothelial walls and are dependent on microscopic pores. These pores show narrow areas (TIGHT JUNCTIONS) which may limit large molecule movement.
The selectively permeable barrier, in the EYE, formed by the nonpigmented layer of the EPITHELIUM of the CILIARY BODY, and the ENDOTHELIUM of the BLOOD VESSELS of the IRIS. TIGHT JUNCTIONS joining adjacent cells keep the barrier between cells continuous.
A specialized transport barrier, in the EYE, formed by the retinal pigment EPITHELIUM, and the ENDOTHELIUM of the BLOOD VESSELS of the RETINA. TIGHT JUNCTIONS joining adjacent cells keep the barrier between cells continuous.
The present review reflects the importance of dielectric barrier discharges in analytical chemistry. Special about this discharge is-and in contrast to usual discharges with direct current-that the pl...
The present study contributes to the evaluation of dielectric barrier discharge-based ambient ionization for mass spectrometric analysis (DBDI-MS) by providing a further step towards an understanding...
The development of a new configuration of chemical ionization (CI)-based ion source is presented. The ambient air containing the gaseous sample is sniffed into an enclosed ionization chamber which is...
In this work, the combined use of desorption by a continuous wave near infrared diode laser and ionization by a dielectric barrier discharge-based probe (laser desorption dielectric barrier discharge...
Dielectric-barrier discharge (DBD) in argon as a cold source is used for the excitation of gaseous inorganic small molecules at atmospheric pressure. By choosing ammonia as a model molecule, the excit...
This study is a randomized, double-blind, placebo-controlled bilateral study on the effect of moisturizing creams on skin barrier function. The hypothesis is that a new active emulsion has...
Patients with liver cirrhosis have an increased risk to develop life-threatening complications such as spontaneous bacterial peritonitis (SBP). Impairment in the intestinal barrier, change...
To evaluate the safety and effectiveness of DuraGen Plus® Adhesion Barrier Matrix as an adhesion barrier in spinal surgery to reduce the extent of peridural fibrosis formation and radicul...
The purpose of this study is to determine the effect of short-term therapy using "VANOS Cream," a super-potent topical steroid cream on skin barrier function in patients with atopic dermat...
The purpose of this study is to determine whether a semi-automated electronic patient discharge summary program leads to increased community physician and housestaff satisfaction and patie...