increase of environmental pollution and restricted emission legislations have forced companies to produce automobiles with lower air pollutants. in this respect, discharge of blowby gases into the environment has been prohibited and their recirculation into the combustion chamber is proposed as an alternative solution. in addition, using egr technique to control and reduce nitrogen oxides in in...

National Bureau of Standards Gaithersburg, MD 20899 A description is given of the NBS program in which special photodiodes for the far ultraviolet spectral region (5254 nm) are made available as transfer standards. These detectors are calibrated in terms of quantum efficiency (photoelectrons per incident photon) as a function of wavelength. Descriptions are also given of the calibration princip...

Hydrogen sulfide poisoning from inhalation of roofing asphalt fumes is a rare but devastating injury. Two cases of toxic inhalation involving exposure to several gases, including hydrogen sulfide, evolved from cooling asphalt, are presented. Both victims were treated with supportive measures, including 100% normobaric oxygen, and one also received sodium nitrite. In one patient rapid, complete ...

Experim ental da ta on electron im pact ionization of gaseous species are of great in terest for predicting and understanding the properties of nonequilibrium plasmas, cf. e.g. ref. [1], However, even for the rare gases discrepancies between published partia l ion­ ization cross section ratios am ount to more th an a factor of 2. The present paper is devoted to precise measurements of partia l ...

2014 We have studied the emission spectra of rare gases produced by a discharge light source. We report 70 new lines for the argon spectrum, related to highly ionized ions, mainly Ar IV to Ar VIII. The classification of these lines has not been possible here, but they are probably emitted by excited states of high potential energy. J. Physique 45 (1984) 665-670 AVRIL 1984, Classification Physic...

Aerodigestive tract burns represent a rare but potentially devastating injury pattern throughout the world. Although the majority of these injuries do not require intervention, these burns have the potential for poor outcomes. Traditionally this disease has been caused by superheated gases found in explosions or fire-related injury. However, as technology advances, it brings novel methods for i...

We report a very rare case of Sevoflurane Induced Diffuse Alveolar Hemorrhage in a previously healthy young adult in the post-operative period following general anesthesia. Diffuse alveolar hemorrhage (DAH) associated with inhalation injury from halogenated gases is a unique entity in the literature that practicing clinicians should be cognizant of and considered in post-operative cases of acut...

Pneumatosis intestinalis (PI) is an uncommon but important condition characterized by the accumulation of gases in the submucosa or subserosa of the gastrointestinal wall. The clinical course of PI represents a wide spectrum of conditions and outcomes that range from benign to life-threatening. Although controversy exists about the exact cause of PI, mucosal integrity, intraluminal pressure, ga...