Sulfur isotopic composition of H2S and SO4(2-) from mineral springs in the Polish Carpathians.

A number of springs in Carpathian Mts. contain dissolved H2S and SO4(2-) in concentrations above 10 mg/dm3. In this study we have investigated the sulfur isotope composition (delta34S) of the dissolved sulfur species in the springs from the flysch area in the Carpathian Mts. along the tectonic dislocation. It is believed that some of these springs may carry a major fraction of dissolved sulfur species of extremely deep sulfur (of mantle origin), which is subjected to SO4(2-)-H2S isotope exchange at high temperatures. The original isotopic compositions may be modified by reduction/oxidation at low temperatures and by admixture of sulfur from other sources. In order to distinguish the sulfur of mantle origin we investigated delta34S of dissolved sulfide and sulfate and on the basis of known concentrations we calculated delta34S of total dissolved sulfur. The isotope fractionation between sulfate and sulfide helped to distinguish the sulfur origin. Evaluating the sulfur isotope exchange, we selected 4 springs which likely have only weakly disturbed sulfur of mantle origin.

Mandibular anatomy as it relates to rigid fixation of the sagittal ramus split osteotomy.

Rigid fixation of osteotomy segments is frequently used to reduce relapse and allow for early mobilization of the mandible following the sagittal ramus split osteotomy. This study evaluated cortical bone thickness in the retromolar area of 49 human mandibles to determine if there is an advantage (in terms of cortical thickness) to placement of screws for rigid fixation at the external oblique ridge versus placement at the inferior border. The mandibles were sectioned vertically at three sites in the retromolar area, corresponding to the bone available for rigid fixation of the sagittal osteotomy. Cortical bone thickness was measured at the external oblique ridge and 5 mm above the inferior border. The buccal and lingual cortices were found to be significantly (P less than .001) thicker at the external oblique ridge than at the inferior border. This suggests that there may be an advantage in terms of stability to placement of internal fixation screws at the superior border.

Mandibular ramus anatomy as it relates to the medial osteotomy of the sagittal split ramus osteotomy.

The sagittal split ramus osteotomy is probably the most frequently used procedure for correction of mandibular skeletal dentofacial deformities. Despite numerous improvements in the technique in the 30 years since the procedure was introduced, a number of troublesome complications still occur. These include unfavorable fracture during surgery, paresthesia, and relapse. The purpose of this study was to determine where fusion of the buccal and lingual cortical plates occurs in the upper mandibular ramus, as it is thought that placement of the horizontal medial osteotomy above the point of fusion (without any intervening medullary bone) may lead to unfavorable fracture during splitting. Forty-nine human mandibles were sectioned vertically at three locations perpendicular to the surface of the ramus and the occlusal plane. Measurements were made to locate vertically the point of fusion of the buccal and lingual cortical plates relative to the lingula and to the depth of the sigmoid notch. The point of fusion occurred between 7.5 and 13.3 mm above the lingula. Only 2% of mandibles had fusion at or below the level of the lingula in the anterior ramus, whereas in the posterior ramus, 6.1% of mandibles were fused at that level. At a level halfway from the lingula to the sigmoid notch, 20% of mandibles were fused in the anterior ramus, whereas in the mid- to posterior ramus, the incidence was as high as 39%. The location of the medial horizontal osteotomy should be at or just above the tip of the lingula. A higher level of cut may be associated with an increased difficulty in splitting or incidence of unfavorable fracture.

[Evaluation of the healing value of Iwonicz mineral water in balneo-climatic therapy of chronic hyperplastic laryngitis with wide pachydermic changes of laryngeal mucous membrane after microsurgery by the Kleinsasser method]. / Ocena leczniczej wartosci iwonickich wód mineralnych w balneoklimatycznym leczeniu przewleklych niezytów hiperplastycznych krtani z rozleglymi zmianami pachydermicznymi blony sluzowej wnetrza krtani po mikrochirurgicznym leczeniu metoda Kleinsassera.

The paper comprises clinical estimation of using Iwonicz mineral water Elin 7 in balneotherapy of chronic hyperplastic laryngitis after its microsurgical therapy by Kleinsasser method. Investigation in the group of 246 people showed that combined treatment, i.e. microsurgery and balneotherapy, is an effective method of healing some hyperplastic inflammatory diseases of mucous membrane of the larynx.

[Demographic issues in the Krosno voivodship from 1975 to 1984]. / Zagadnienia demograficzne wojewodztwa krosnienskiego w latach 1975-1984

PIP: An analysis of population trends in Krosno voivodship, Poland, for the period 1975-1984 is presented. Topics covered include population growth, density, and rural-urban distribution; natural increase; and selected demographic indicators.^ieng