scholarly journals Mellkasi sérültek drenázsadatainak vizsgálata

2019 ◽  
Vol 160 (5) ◽  
pp. 172-178
Author(s):  
Ákos Csonka ◽  
Dávid Dózsai ◽  
Tamás Ecseri ◽  
István Gárgyán ◽  
István Csonka ◽  
...  
Keyword(s):  
Average Duration ◽  
Middle Section ◽  
Lower Section ◽  
Chest Drainage ◽  
X Ray ◽  
Chest Injuries ◽  
Method Clinical Data ◽  
Significant Difference ◽  
Trauma Surgeons ◽  
Injured Patients

Abstract: Introduction: Chest injuries cause a significant number of pneumothorax (PTX) and hemothorax (HTX). The most commonly used treatment is chest-tube drainage. The position of the tube is a prime necessity to achieve adequate drainage. Aim: To analyze the duration of chest drainage at the occurrence of PTX and HTX. To find what the underlying cause of drainage insufficiency is and whether there is any relation between the surgical qualification needed to the procedure. Method: Clinical data of 110 injured patients from 2011 to 2015 were collected and retrospectively analyzed. In the case of tube breaking or drainage insufficiency it was investigated if repositioning, usage of new tubes or insertion of additional tubes resolved the drainage insufficiency. Authors investigated the location of the tube on x-ray and CT, and the connection between the drainage insufficiency and the surgical qualifications needed to the procedure. Results: The average duration of chest drainage was 6.5 days. The duration of drainage was shorter by 1.9 days regarding the tube inserted in the middle section of the chest compared to the upper one and shorter by 1.2 days regarding the tube inserted in the lower section of the chest compared to the upper one. In the case of HTX, the duration of drainage was shorter by 2.8 days regarding the lower and by 3.6 days regarding the middle section compared to the upper position. Drainage insufficiency occurred in 30% of all cases. The duration of chest drainage was shorter after application of new tubes (9.5 days) than after reposition (10.2 days), but there was no significant difference. Conclusion: Chest injury is a wide entity, thus one standard protocol cannot be developed on the management of these injuries. Authors concluded that drainage duration decreases significantly if the position of the tube is in the middle or lower section of the chest. The high occurrence of drainage insufficiency was caused by inadequate tube positioning and tube breaking. The practical qualification of trauma surgeons did not play a significant role regarding the prevalence of drainage insufficiency rather if the tube positioning was appropriate. Orv Hetil. 2019; 160(5): 172–178.

scholarly journals Stratigraphical reinterpretation of Devonian strata underlying the Mons Basin based on cuttings from the Saint-Ghislain borehole, Hainaut, Belgium

2020 ◽  
Vol 23 (1-2) ◽  
pp. 29-39
Author(s):  
Luciane LICOUR ◽  
Pascal GODERNIAUX ◽  
Nicolas DUPONT ◽  
Michel HENNEBERT ◽  
Rudy SWENNEN ◽  
...  
Keyword(s):  
Visual Analysis ◽  
Middle Section ◽  
X Ray Diffraction ◽  
Lower Section ◽  
X Ray ◽  
Geological Interpretation ◽  
Geothermal Potential ◽  
Calcareous Shale ◽  
Source Of Information ◽  
Lower Frasnian

It is revealed that the lowest 1010 m of the Saint-Ghislain borehole (-4393 to -5403 m), of which cuttings are available, constitutes a crucial source of information to investigate, amongst others, the deep geothermal potential within the Brabant Parautochthon, underlying the Mons Basin, Hainaut. The lithological succession of this interval was reconstructed based mainly on visual analysis and calcimetry of 852 cutting samples as well as four cored sections. Additionally, palynological, magnetic susceptibility and X-ray diffraction analyses were conducted in order to complement the dataset. The lower section of the investigated borehole sequence mainly consists of grey calcareous shale while the middle section is dominated by blue-grey shaly limestone and the upper section is mainly composed of green shale. Palynomorphs found at -5261 m suggest a latest Givetian–Early Frasnian age. A new lithostratigraphical interpretation of the deepest part of the Saint-Ghislain borehole is proposed. The lower calcareous shale from ‑5403 to ‑5100 m is interpreted as the Bovesse Formation (Lower Frasnian) and at its base possibly uppermost Givetian. The overlying limestones from -5100 to -4790 m can be attributed to the Rhisnes Formation (Upper Frasnian), and the green shale between ca. -4393 and -4790 m, to the Bois de la Rocq Member (Famennian). These results open new insights regarding the geological interpretation of the basement underlying the Mons Basin. They also present a promising approach and example regarding interpretations based on cuttings.

scholarly journals The evolution of trauma care in the Netherlands over 20 years

2019 ◽  
Vol 46 (2) ◽  
pp. 329-335 ◽  
Author(s):  
Falco Hietbrink ◽  
Roderick M. Houwert ◽  
Karlijn J. P. van Wessem ◽  
Rogier K. J. Simmermacher ◽  
Geertje A. M. Govaert ◽  
...  
Keyword(s):  
The Netherlands ◽  
Trauma Care ◽  
Trauma System ◽  
Trauma Surgeon ◽  
Severely Injured ◽  
Severely Injured Patients ◽  
The Past ◽  
Level 1 ◽  
Trauma Surgeons ◽  
Injured Patients

Abstract Introduction In 1999 an inclusive trauma system was initiated in the Netherlands and a nationwide trauma registry, including all admitted trauma patients to every hospital, was started. The Dutch trauma system is run by trauma surgeons who treat both the truncal (visceral) and extremity injuries (fractures). Materials and Methods In this comprehensive review based on previous published studies, data over the past 20 years from the central region of the Netherlands (Utrecht) was evaluated. Results It is demonstrated that the initiation of the trauma systems and the governance by the trauma surgeons led to a region-wide mortality reduction of 50% and a mortality reduction for the most severely injured of 75% in the level 1 trauma centre. Furthermore, major improvements were found in terms of efficiency, demonstrating the quality of the current system and its constructs such as the type of surgeon. Due to the major reduction in mortality over the past few years, the emphasis of trauma care evaluation shifts towards functional outcome of severely injured patients. For the upcoming years, centralisation of severely injured patients should also aim at the balance between skills in primary resuscitation and surgical stabilization versus longitudinal surgical involvement. Conclusion Further centralisation to a limited number of level 1 trauma centres in the Netherlands is necessary to consolidate experience and knowledge for the trauma surgeon. The future trauma surgeon, as specialist for injured patients, should be able to provide the vast majority of trauma care in this system. For the remaining part, intramural, regional and national collaboration is essential

scholarly journals Crystal structure of pimecrolimus Form B, C43H68ClNO11

2021 ◽  
Vol 36 (1) ◽  
pp. 35-42
Author(s):  
Shivang Bhaskar ◽  
Joseph T. Golab ◽  
James A. Kaduk ◽  
Amy M. Gindhart ◽  
Thomas N. Blanton
Keyword(s):  
Crystal Structure ◽  
Powder Diffraction ◽  
Density Functional ◽  
Van Der Waals Interactions ◽  
Powder Diffraction File ◽  
X Ray ◽  
Weak Intermolecular Interactions ◽  
Significant Difference ◽  
Atomic Coordinates ◽  
Solid State Conformation

The crystal structure of pimecrolimus Form B has been solved and refined using synchrotron X-ray powder diffraction data and optimized using density functional techniques. Pimecrolimus crystallizes in the space group P21 (#4) with a = 15.28864(7), b = 13.31111(4), c = 10.95529(5) Å, β = 96.1542(3)°, V = 2216.649(9) Å3, and Z = 2. Although there are an intramolecular six-ring hydrogen bond and some larger chain and ring patterns, the crystal structure is dominated by van der Waals interactions. There is a significant difference between the conformation of the Rietveld-refined and the DFT-optimized structures in one portion of the macrocyclic ring. Although weak, intermolecular interactions are apparently important in determining the solid-state conformation. The powder pattern is included in the Powder Diffraction File™ (PDF®) as entry 00-066-1619. This study provides the atomic coordinates to be added to the PDF entry.

scholarly journals Integration of Dental Implants in Conjunction with EDTA-Conditioned Dentin Grafts: An Experimental Study

2021 ◽  
Vol 9 (6) ◽  
pp. 63
Author(s):  
Payam Farzad ◽  
Ted Lundgren ◽  
Adel Al-Asfour ◽  
Lars Andersson ◽  
Christer Dahlin
Keyword(s):  
Direct Contact ◽  
Mineral Content ◽  
X Rays ◽  
X Ray ◽  
Dentin Surface ◽  
Significant Difference ◽  
C And N ◽  
Micro Implants ◽  
Demineralized Dentin

This study was undertaken to investigate the integration of titanium micro-implants installed in conjunction with previously dentin-grafted areas and to study the morphological appearance, mineral content, and healing pattern of xenogenic EDTA-conditioned dentin blocks and granules grafted to cavities in the tibial bone of rabbits. Demineralized and non-demineralized dentin blocks and granules from human premolars were implanted into cavities prepared on the lateral aspects of the tibias of rabbits. After a healing period of six months, micro-implants were installed at each surgical site. Histological examinations were carried out after 24 weeks. Characterization of the EDTA-conditioned dentin blocks was performed by means of light microscopy, dental X-rays, scanning electron microscopy, and energy dispersive X-ray analysis (EDX). No implants were found to be integrated in direct contact with the dentin particles or blocks. On the EDTA-conditioned dentin surface, the organic marker elements C and N dominated, as revealed by EDX. The hydroxyapatite constituents Ca and P were almost absent on the dentin surface. No statistically significant difference was observed between the EDTA-conditioned and non-demineralized dentin, as revealed by BIC and BA. The bone-inductive capacity of the dentin material seemed limited, although demineralization by means of EDTA indicated higher BIC and BA values in conjunction with the installed implants in the area. A 12 h EDTA treatment did not fully decalcify the grafts, as revealed by X-ray analysis.

scholarly journals X-ray properties of He ii λ 1640 emitting galaxies in VANDELS

2020 ◽  
Vol 496 (3) ◽  
pp. 3796-3807
Author(s):  
A Saxena ◽  
L Pentericci ◽  
D Schaerer ◽  
R Schneider ◽  
R Amorin ◽  
...  
Keyword(s):  
Formation Rate ◽  
Galactic Nuclei ◽  
X Ray ◽  
Star Forming ◽  
Set Constraints ◽  
Significant Difference ◽  
Low Metallicity ◽  
Matched Samples ◽  
X Ray Binaries

ABSTRACT We explore X-ray emission from a sample of 18 He ii λ1640 emitting star-forming galaxies at z ∼ 2.3–3.6 from the VANDELS survey in the Chandra Deep Field South, to set constraints on the role of X-ray sources in powering the He ii emission. We find that 4 He ii emitters have tentative detections with S/N ∼ 2 and have X-ray luminosities, LX = 1.5−4.9 × 1041 erg s−1. The stacked luminosity of all 18 He ii emitters is 2.6 × 1041 erg s−1, and that of a subset of 13 narrow He ii emitters (FHWM(He ii) < 1000 km s−1) is 3.1 × 1041 erg s−1. We also measure stacked LX for non-He ii emitters through bootstrapping of matched samples, and find LX = 2.5 × 1041 erg s−1, which is not significantly different from LX measured for He ii emitters. The LX per star formation rate for He ii emitters (log (LX/SFR) ∼ 40.0) and non-emitters (log (LX/SFR) ∼ 39.9) are also comparable and in line with the redshift evolution and metallicity dependence predicted by models. Due to the non-significant difference between the X-ray emission from galaxies with and without He ii, we conclude that X-ray binaries or weak or obscured active galactic nuclei are unlikely to be the dominant producers of He ii ionizing photons in VANDELS star-forming galaxies at z ∼ 3. Given the comparable physical properties of both He ii emitters and non-emitters reported previously, alternative He ii ionizing mechanisms such as localized low-metallicity stellar populations, Pop-III stars, etc. may need to be explored.

scholarly journals Diagnosis of secondary caries in esthetic restorations: influence of the incidence vertical angle of the X-ray beam

2011 ◽  
Vol 22 (2) ◽  
pp. 129-133 ◽  
Author(s):  
Patrícia Lima Moreira ◽  
Michel Reis Messora ◽  
Stela Márcia Pereira ◽  
Solange Maria de Almeida ◽  
Adriana Dibo da Cruz
Keyword(s):  
Interobserver Reliability ◽  
Negative Influence ◽  
Composite Resins ◽  
Wilcoxon Test ◽  
Vertical Angle ◽  
Human Teeth ◽  
Radiographic Images ◽  
Secondary Caries ◽  
X Ray ◽  
Significant Difference

The aim of this study was to evaluate the accuracy on the diagnosis of secondary caries-like lesions simulated on esthetic restorations of different materials, changing the incidence vertical angle (IVA) of the x-ray beam. Twenty human teeth received MOD inlay preparations. In the experimental group (n=10), a round cavity was made in the floor of the proximal box to simulate the caries-like lesion. All teeth were restored with 3 composite resins (Charisma, Filtek-Z250 and TPH-Spectrum) at 3 moments. Two radiographic images were acquired with 0º and 10º IVA. Ten observers evaluated the images using a 5-point confidence scale. Intra- and interobserver reliability was analyzed with the Interclass Correlation Coefficient and the diagnostic accuracy was evaluated using the area under the ROC curve (Az), Friedman test and Wilcoxon test (α=0.05). Higher accuracy values were obtained with 10º IVA (Az=0.66, Filtek-Z250>Az=0.56, TPH-Spectrum) compared to 0º (Az=0.55, Charisma>Az=0.37, TPH-Spectrum), though without statistically significant difference (p>0.05). The detection of secondary caries-like lesions simulated on esthetic restorations of different materials suffered no negative influence by changing the IVA of the x-ray beam.

Plastic deformations in kyanites by tectonometamorphic processes: a single-crystal X-ray diffraction study

2009 ◽  
Vol 73 (3) ◽  
pp. 359-371 ◽  
Author(s):  
G. D. Gatta ◽  
N. Rotiroti ◽  
M. Zucali
Keyword(s):  
Single Crystal ◽  
X Ray Diffraction ◽  
Plastic Deformations ◽  
X Ray ◽  
Deformational History ◽  
Significant Difference ◽  
Elliptical Section ◽  
History Of ◽  
Diffraction Patterns ◽  
Two Stages

AbstractThe crystalch emistry and crystal structure of naturalky anite crystals from the Eclogitic Micaschists Complex of the Sesia-Lanzo Zone, Western Italian Alps, have been investigated by means of optical microscopy, wavelength dispersive X-ray microanalysis, and single-crystal X-ray diffraction. The association of kyanite + garnet + phengitic-mica + chloritoid suggests that the eclogite-facies stages occurred at P ≤ 2.1 GPa and T ≤ 650ºC. Kyanite grains are large (cm-sized) porphyroblasts grown dynamically during one of the deformational events related to the subduction of the Austroalpine continentalcr ust. Under the polarizing microscope, kyanite grains show almost homogeneous cores, whereas rims are sometimes symplectitic aggregates of quartz and kyanite, confirming at least two stages of growth most likely related to the multistage deformational history of these rocks. Chemical analysis shows that Fe3+ is the major substituting cation for Al3+, ranging between 0.038 and 0.067 a.p.f.u.The single-crystal X-ray diffraction investigation of the kyanites shows severely textured patterns on the (h0l)*-plane. Such evidence is not observed in the unwarped diffraction patterns on (0kl)* and (hk0)*. The most significant difference between the structuralp arameters refined in this study, with respect to those of previously published unstrained gem-quality crystals, concerns the displacement parameters. The anisotropic displacement ellipsoids of all the atomic sites are significantly larger than those previously described, and systematically oriented with the largest elliptical section almost perpendicular to [010]. The larger ellipsoids in the kyanite crystal investigated here reflect the displacement of the centre of gravity of the electron distribution, rather than an anomalous atomic thermal motion. The magnitude and orientation of the displacement parameters and the textured/strained diffraction pattern may be the result of two combined effects: (1) that the kyanite crystals are actually composed of several blocks; (2) the crystals are affected by a pervasive residual strain, as a result of tectonometamorphic plastic deformations and re-crystallization.

scholarly journals Effect of X-ray irradiation on the F1 generation of Sitophilus zeamais Motschulsky and the germination rate of maize grain

2021 ◽  
Vol 82 (1) ◽  
Author(s):  
Sobifagha Princess Bell-Gam ◽  
Luke Chinaru Nwosu ◽  
Kayode David Ileke ◽  
Uwaoma Otuodichinma Aguwa
Keyword(s):  
Germination Rate ◽  
Seed Viability ◽  
Control Process ◽  
Progressive Increase ◽  
Sitophilus Zeamais ◽  
Maize Weevil ◽  
Maize Production ◽  
X Ray ◽  
Significant Difference ◽  
Flour Production

Abstract Background The use of X-ray irradiation in the control of the maize weevil, Sitophilus zeamais Motschulsky (Coleoptera: Curculionidae) infesting stored maize was tested at 60, 70 and 80 KeV as part of the international concerted efforts to save maize production and enhance food security. Investigations were done in the laboratory at mean temperature and relative humidity of 29.2 °C and 75.7%, respectively using three varieties of maize. The possibility that X-ray irradiation can affect the viability of maize grains when planted after weevil control process was also evaluated in the laboratory. Standard methods were used to achieve the specific objectives, and X-ray machine snap constituted the exposure time for each dose. Results The results revealed 10% mortality of adult weevils after 24 h and 40% mortality after a period of 7 days. The result indicates moderate effect on mortality. Progressive increase in mortality was recorded as dose increased from 60 to 80 KeV. X-ray irradiation at the doses tested did not significantly (P > 0.05) restrict S. zeamais emergence from maize grains and did not also significantly protect grains against damage and flour production. There was no difference in the pattern of daily emergence of new progenies and pattern of accumulated emergence. The relationship between X-ray irradiation doses and weight of emerging progenies require more specific analysis. Absence of significant difference between the viability of irradiated grains and un-irradiated grains strongly suggests that X-ray irradiation did not adversely affect seed viability, and this gives irradiation technique an opportunity of higher acceptability in agriculture. Conclusions We recommend > 80 KeV of X-ray irradiation or its incorporation into integrated pest management system in order to achieve effective post-harvest control of the pest.

Crystallization of simonkolleite (Zn5Cl2(OH)8 ∙ H2O) in powder samples prepared for mineral composition analysis by quantitative X-ray diffraction (QXRD)

Nafta-Gaz ◽  
2021 ◽  
Vol 77 (5) ◽  
pp. 293-298
Author(s):  
Urszula Zagórska ◽  
◽  
Sylwia Kowalska ◽  
Keyword(s):  
Quantitative Analysis ◽  
Internal Standard ◽  
Mineralogical Composition ◽  
Hydrocarbon Exploration ◽  
Composition Analysis ◽  
Internal Standard Method ◽  
X Ray Diffraction ◽  
Method Error ◽  
X Ray ◽  
Significant Difference

The analysis of mineralogical composition by quantitative X-ray diffraction (QXRD) is one of the standard research methods used in hydrocarbon exploration. In order to improve it and to obtain better results, the methodology of quantitative analysis used at Well Logging Department is being periodically (more or less) modified. After the introduction of the improvements, comparative analyses were performed on archival samples. Reflections from an unidentified phase which did not occur in the tested Rotliegend sandstone samples were noticed on X-ray diffractograms of archival samples. Reflections of a mineral called simonkolleite were identified in the X-ray diffraction database. Chemically it is a hydrated zinc chloride of the formula: Zn5Cl2(OH)8 × H2O. Analysis of the composition of samples in which simonkolleite crystallised, indicated that the mineral is being formed in the result of the slow reaction of zinc oxide with halite (NaCl) and water vapour. An attempt was made to determine the influence of the presence of this mineral on the results of the quantitative analysis of mineralogical composition. The above methodology was applied on a group of ten samples. The results of the quantitative analysis conducted for archival samples stored with added zincite standard containing simonkolleite and for new, freshly grinded (without artifact) samples were compared. The comparison of the obtained results showed a slight influence of this mineral on the quantitative composition of the remaining components. The difference between the results usually did not exceed the method error. At the same time a significant difference in the calculated content of the internal standard was noted – on average 1% less in archival than in new samples. This shows that the reaction occurring in the archival samples will affect the evaluation of the quality of the obtained quantitative analysis, at the same time excluding the possibility of determining the rock’s amorphous substance content with the internal standard method.

FC 122BONE DENSITOMETRY IN RENAL TRANSPLANTED PATIENTS

2021 ◽  
Vol 36 (Supplement_1) ◽  
Author(s):  
Ana Carina Ferreira ◽  
Marco Mendes ◽  
Cecília Silva ◽  
Patrícia Cotovio ◽  
Inês Aires ◽  
...  
Keyword(s):  
Bone Densitometry ◽  
Bone Disease ◽  
Bone Biopsy ◽  
Bone Volume ◽  
Categorical Variables ◽  
Good Tool ◽  
X Ray ◽  
Normal Bone ◽  
Dialysis Vintage ◽  
Significant Difference

Abstract Background and Aims Renal transplant and associated immunosuppression can influence bone volume. The aim of this study was to analyze the relations between bone biopsy data and levels of bone-related molecules [phosphorus (Pi), Calcium (Ca), Magnesium (Mg), parathyroid hormone (PTH), bone alkaline phosphatase (bAP), calcitonin, vitamin D (vitD), alpha-klotho, fibroblast grow factor (FGF) 23, sclerostin], obtained 1-year after transplantation with bone densitometry findings in the same time point in renal transplanted patients. Method We performed a prospective cohort study of a consecutive sample of de novo single renal transplanted patients in our unit. At inclusion, demographic, clinical and transplant-related data were collected, X-ray of the pelvis and hands (Adragão score) and echocardiographic findings were recorded. All patients were submitted to a laboratorial evaluation and a bone biopsy at baseline. Patients were followed for 12 months, after which performed laboratorial evaluation, 2nd bone biopsy, echocardiogram, X-ray of pelvis and hands, bone densitometry (DXA) and non-contrast cardiac CT. For this report we use the information of the 2nd analysis: laboratorial information, bone histology information, as well the densitometry evaluation. Continuous variables were presented as medians and categorical variables as frequencies. Associations between variables were performed using Wilcoxon rank-sum test, Fisher exact test, Kruskal Wallis rank test or Spearman correlation test. Multivariate analysis was performed using linear regression models. STATA software was used and p < 0.05 was considered statistically significant. Results We recruited 84 patients and, at the end of 12 months, we performed a 2nd evaluation in 69 patients. Median age 53 years, 48 men, 53 caucasian (78.8%), median BMI 24.6, median dialysis vintage 55 months. Patients had a median cumulative steroid dose of 5692.5 mg. Analyzing bone biopsies, we found that 28 patients had adynamic bone disease; 6 had hyperparathyroid bone disease; 2 had osteomalacia and 3 other abnormal mineralization; 8 patients presented only with osteoporosis. There was no significant difference between bone volume / total volume pre transplant (18%) and 1 year after transplantation (19%). Using DXA technique, 14 patients were classified has having osteoporosis, and all those had low volume at the bone biopsy. Nevertheless, in 4 patients low bone turnover was also present. The positive predictive value dropped from 100% to 57%, if we add the other abnormalities of bone, in addiction to the volume. DXA exam wasn’t a good tool to detect a normal bone volume, as the negative predicted value dropped from 78% (normal volume, irrespective of turnover and mineralization) to 37% (normal bone biopsy). Nevertheless, overall bone volume assessed by a bone biopsy correlated well with densitometry findings. Conclusion DXA exam isn’t a good tool to identify the bone quality. Nevertheless, once osteoporosis is detected the probability of the patient having low bone volume is high, but we still need a bone biopsy in order to exclude mineralization or turnover deviations.

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