Aspiration of a primary tooth in a patient with a tracheostomy

We report a clinical case of a patient affected by splenic non-Hodgkin lymphoma and virus C hepatitis. It seems that this kind of association is original because as far as we know the association between non-Hodgkin lymphoma and HCV did not include non-Hodgkin lymphoma involving the spleen. Indeed, in our patient, there was an increase of CD/57 lymphocytes. In our opinion this could be interesting in the disorders of the immune system associated with lymphoma.     

Growth kinetics of a surface film during the annealing of a mixture of a metal powder and a decomposing oxide

Conclusions Equations have been derived describing the growth kinetics of surface films. Conditions have been determined under which surface films cease to be porous and become coherent. Values of the coefficient of oxygen diffusion in copper at a temperature of 850°C calculated using the equations proposed and experimental data are in good agreement with a value cited in the literature.Translated from Poroshkovaya Metallurgiya, No. 2(182), pp. 22–25, February, 1978.     

Videoscopic resection of a thrombosed aneurysm of a patent ductus arteriosus in a neonate

OBJECTIVE: In the wake of the U.S. Supreme Court's 1990 decision in Zinermon v. Burch, renewed attention has been given to capacities patients must have to be considered competent to consent to voluntary hospitalization. An American Psychiatric Association (APA) task force suggested that strong policy interests support the establishment of a low threshold for competence in this situation. The study examined whether, as previous research suggested, patients would have difficulty meeting even this lenient standard. METHODS: One hundred voluntarily hospitalized psychiatric patients were read two brief paragraphs, one explaining the purposes of psychiatric hospitalization and and the other explaining policies for discharge. The paragraphs' readability measured about eighth-grade level. After each paragraph, participants were read two sets of questions, one testing recall of the presented information and the other testing recognition of the information in a true-false format. The scores of patients grouped by selected demographic and clinical variables were compared. RESULTS AND CONCLUSIONS: The vast majority of patients were able to comprehend the information that the APA task force suggested was relevant to their decision. However, a subgroup of patients who were initially admitted involuntarily had significantly poorer performance and may constitute a group who need special educational efforts focused on the consequences of voluntary admission.     

Reliability of a knowledge of AIDS scale a replication

Zimet's knowledge of AIDS scale was completed anonymously by 2,209 university students to assess whether a split-half approach in which items in each half were matched for content would provide better estimates of reliability than other method. Analysis indicates that the odd even Spearman Brown split-half reliability coefficient was lower than both the alpha coefficient and the content-based split-half coefficient. The Cronbach alpha was similar to the content-based Spearman-Brown reliability coefficient.     

Tribotechnical properties of a composite of a metal-ceramic system

The paper reports the results of tribotechnical tests of a metal matrix based on a copper-nickel alloy with a tin-lead solid lubricant additive which contained varying amounts of the ceramic binary alloy B₄C+ZrB₂. The tests showed that the presence of a refractory phase in the metal matrix greatly enhanced the Institute for Problems of Materials Science, Ukraine National Academy of Sciences, Kiev. Translated from Poroshkovaya Metallurgiya, Nos. 7–8(402), pp. 54–58, July–August, 1998.     

旋流器替代分级机的应用

在磨矿分级作业中，采用旋流器替代分级机进行分级是发展的趋势。这一举措能够与国外先进的磨矿分级工艺技术有效对接。特别是在大型选矿厂改扩建设计项目中旋流器有更广泛的应用价值。     

Entrainment of a two-layer liquid through a taphole

Entrainment through a taphole of a two-layer system has been investigated. The results showed that for liquids with low viscosities, the minimum dimensionless clearance from the taphole before entrainment occurs can be predicted theoretically and was related to the Froude number as Fr^0.4. At low Froude numbers less than 1, fluids with low viscosities resulted in the entrainment showing a positive deviation from the critical Froude number. This allowed tapping to be carried out without entrainment occurring, even when the liquid-liquid interface was within the region of the taphole diameter. For liquids with appreciable viscosities, the entrainment showed a negative deviation from the critical Froude number. This occurs for the tapping of slag and results in entrainment at a higher liquid-liquid interface height than is predicted theoretically. Entrainment was more likely to happen for slag tapping than for matte tapping. A ledge below the taphole was found to reduce entrainment, enabling the liquid-liquid interface to be closer to the taphole during tapping. This resulted in improved slag removal efficiencies and reduced matte or metal entrainment, coupled with less slag left in the furnace after tapping. The length of the ledge from the taphole into the slag was found to be the controlling parameter for entrainment, while the ledge thickness had no effect on entrainment.     

Computer study of tweed as a precursor to a martensitic transformation of a Bcc lattice

Using molecular dynamics computer simulations we have studied a bcc crystal with an interatomic potential having a second derivative which passes through zero near second neighbor distances. This causes an inherent tetragonal instability which manifests itself as random dynamic tetragonal distortions at high temperature (“dynamic tweed”), quasi-static and somewhat spatially correlated tetragonal distortions at intermediate temperatures (“static tweed”), and an apparent martensitic transformation to a close-packed structure at low temperatures. The effect of simple defects (vacancies and interstitials) on the development and spatial localization of the pretransformation structure (tweed) and the subsequent martensitic transformation will also be discussed. This paper is based on a presentation made in the symposium “Pretransformation Behavior Related to Displacive Transformation in Alloys” presented at the 1986 annual AIME meeting in New Orleans, March 2–6, 1986, under the auspices of the ASM-MSD Structures Committee.     

Results of a performance test of making a colloidal anode mass for a Soderberg anode

The results of putting a fundamentally new type of anode mass with a decreased (from 28 to 24%) content of coal-tar pitch and an increased content of the dust fraction of petroleum coke into industrial use are presented. This approach improves the environmental conditions in the works and increases the economic indices of the electrolysis technology of aluminum. A layout of a shop for making the anode mass for the Soderberg colloidal anode is described. The properties of pitch and coke are investigated, and the quality of the produced anode mass is evaluated. The results of a performance test allow one to speak about the competitiveness of the electrolysis technology of aluminum with the Soderberg anode.