382 research outputs found
Improvement in estimating the population mean in simple random sampling
No full textAbstractThis paper proposes some estimators for the population mean using the ratio estimators presented in [C. Kadilar, H. Cingi, Ratio estimators in simple random sampling, Applied Mathematics and Computation 151 (2004) 893–902] and shows that all proposed estimators are always more efficient than the ratio estimators. This result is also supported by a numerical example
INTERACTION OF HEPARAN-SULFATE AND ITS FRACTIONS WITH ENDOTHELIAL-CELLS IN CULTURE
No full textIn the present work we have investigated the binding capacity, to cell membrane of bovine aortic endothelial cells (BAEC) cultured in vitro, of heparan sulfate (Mr 11.1 kDa) and its four fractions named A (Mr 24.5 kDa), B (Mr 10.7 kDad), C (Mr 9.1 kDa) and D (Mr 6.8 kDa). Experiments were performed in comparison with unfractionated heparin (Mr 12.9 kDa). The binding of the examined compounds was determined by the degree of displacement of [H-3]-heparin from the cell membrane. The efficiency of heparan sulfate fractions B, C and D in displacing labelled heparin was found to decrease in function with the decrease of the molecular masses of the compounds, [H-3]-heparin could be efficiently displaced mainly by heparin and fraction A, the fraction which has the highest molecular weight and represents only 3.8% of the unfractionated HA 90681. These experimental results may confirm that molecular mass is an important feature for the interaction of glycosaminoglycans with the specific binding sites on the cell surface
Dimeric complexes of palladium with hydrazone. Crystal structure of bis(acetone methyl- phenylhydrazone) tetrachlorodipalladium(II) chloroform solvate (1:1)
No full textThe structure of the title complex was detd. by Patterson and Fourier syntheses and refined by full-matrix least-squares to R = 0.059 for 1144 reflections. The compd. is monoclinic, space group P21/c, with a 19.166, b 11.235, c 14.191 Å, and β 103.1°; Z = 4. PdCl2L2 (L = R2C:NNMePh, R = Me, Et) and Pd2Cl4L2 (R = Et) were also prepd. and characterized by IR and NMR spectra
A survey on chronic rhinosinusitis: opinions from experts of 50 countries
No full textChronic rhinosinusitis (CRS) is a very prevalent inflammatory disease. Treatments vary in different countries. In the present study, we explored the approaches of physicians in 50 countries. In this cross-sectional study, a rhinosinusitis survey (RSS) was completed by Honorary and Corresponding Members (otorhinolaryngologists) of the Italian Society of Rhinology. In 79.1 % of the 50 countries, the proportion of patients suffering from CRS was 15 %. Nasal symptoms were more intense in winter (46 % of countries), and spring and autumn (22 %). The most common symptoms were nasal obstruction (86 %), postnasal drip (82 %) and headache (52 %). The most common investigative modalities in the assessment of CRS are paranasal sinus CT, fiberoptic endoscopy, and anterior rhinoscopy. CRS patients were principally treated by otorhinolaryngologists (70 %). Medical treatments included nasal corticosteroids (90 %), nasal washes (68 %), and nasal decongestants (32 %). In 88 % of countries, more than 50 %, or "about 50 %", of all patients reported subjective symptom improvement after treatment. In most of the countries, surgery was required by 20-35 % of all CRS patients. During post-surgery follow-up, nasal washes (90 %), nasal corticosteroids (76 %), and systemic antibiotics (32 %) were prescribed. In 20-40 % of all patients, CRS was associated with nasal polyps. In such patients, the medical treatment options were nasal corticosteroids (90 %), systemic corticosteroids (50 %), nasal washes (46 %), and systemic antibiotics (34 %). Treatment of CRS patients varies in different countries. Paranasal sinus CT is the most common investigative modality in the assessment of CRS, and nasal corticosteroids are the first-line treatment, in the absence or presence of nasal polyps
Influence of allergic rhinitis in children and adolescents with recurrent headache
No full textIntroduction: Migraine and allergies are common occurrences. The aim of this study was to investigate the relationship between respiratory allergy and cephalalgic migraine in childhood.Materials and Methods: We screened 800 children for headache and its characteristics. After that we investigated the presence of allergy performing prick tests, rhinoscopy, endoscopy, rhinomanometry, nasal cytology and mucociliary clearance tests.Results: Out of 800 children screened, 96 suffered from headache. Among these, 67 resulted to suffered from both headache and allergy. We found a significant correlation between allergy and headache onset in the morning and headache onset in the evening in non-allergic subjects. The average duration of the a headache attack was independent from the presence of allergy, as well as the frequency of the cephalalgy attacks, and the localization of the pain. Prodromal symptoms connected with headache were reported to be: dizziness, aurea, sparkling scotoma, nausea and vomiting, and they were associated with absence of allergy. We also found a relationship between female gender and headache onset, but in teen-agers only. Paracetamol or FANS were used in the majority of cases, but antihistaminic therapy and/or nasal topical sprays were also reported.Discussion: For an effective diagnostic and therapeutic approach to migraine, the pediatrician should take into account atopy and its related allergic manifestations requiring a consultation with an otolaryngologist or allergist, if necessary. Our findings also stress the potential role of medicines that are not usually utilized for migraine attacks, such as antihistamines or decongestionant nasal sprays
The International Study of the Allergic Rhinitis Survey: outcomes from 4 geographical regions.
No full textBackground
Allergic rhinitis (AR) is a global health problem and is characterised by one or more symptoms, including sneezing, itching, nasal congestion and rhinorrhea.
Objective
We investigated the features of AR and the physician's approach to the management of AR patients in four geographical regions.
Methods
In this cross-sectional study, a questionnaire survey concerning AR was completed by Honorary and Corresponding Members of the Italian Society of Rhinology from different countries among 4 world geographical regions—Asia, Europe, the Americas, and Africa.
Results
The prevalence of AR was reported to be 15%–25%. Children and adolescents, as well as young adults, were the age groups more affected by AR with comorbidities of asthma, sinusitis, conjunctivitis, and nasal polyposis. Nasal symptoms of AR were more intense in the spring (51.92%) and autumn (28.85%). The most common aero-allergens were pollen and mites (67.31%), animal dander and pollutants (23.08%), and fungal allergens (21.15%). Allergen-specific immunotherapy was prescribed for both perennial and seasonal allergens (32.69%) via sublingual swallow (46.15%) and subcutaneous (32.69%) routes. For the AR patients, the most prescribed drugs were intranasal corticosteroids (86.54%) and oral H1-antihistamines (82.69%).
Conclusion
A network of experts can improve our knowledge concerning AR epidemiology, and together with guidelines, could assist practitioners and otolaryngologists in standardising the diagnosis and treatment of AR
Measurements and scaling of buoyancy-induced flows in ventilated tunnels
No full textWe investigate the ventilation conditions required to control the propagation of smoke, produced by a tunnel fire, in the presence of two inertial forcings: a transverse extraction system and a longitudinal flow. For that purpose, we performed a series of experiments in a reduced-scale tunnel, using a mixture of air and helium to simulate the release of hot smoke during a fire. Experiments were designed to focus on the ventilation flows that allow the buoyant release to be confined between two adjacent extraction vents. Different source conditions, in terms of density and velocity of the buoyant release, were analysed along with different vent configurations. Experiments allowed us to quantify the increase of the extraction velocity needed to confine the buoyant smoke, overcoming the effect of an imposed longitudinal velocity. Vents with a rectangular shape, and spanning over the whole tunnel width, provide the best performance. Finally, we studied the stratification conditions of the flow, individuating four regimes. Interestingly, when the stratification conditions fade out, as both the longitudinal flow and vertical extraction flows increase, the flow dynamics becomes almost independent of the forcing induced by the presence of buoyant smoke, which eventually acts as a passive scalar transported by the flow
Mauch, Wm. (Birth, 1897-01-21)
No full textAddress: Cinti514/Pg 181/1897/M W/Cingi/Cinti/Mrs. C. GroteOriginal record filed in drawer labeled 'MASSMAN-MAYERHOEFER'
Management of staple line leaks after laparoscopic sleeve gastrectomy: Single-center experience
No full textObjective: In obesity surgery, laparoscopic sleeve gastrectomy (LSG) is a frequently applied method. However, there are certain complications. Leakage is one of the most serious complications after surgery, causing postoperative morbidity and sometimes mortality. There is no consensus about management of leaks after LSG. In our study, we aimed to present our experience on the management of LSG leaks. Patients and Methods: Patients who underwent LSG between 2010-2017 in a tertiary university hospital were analyzed retrospectively. Demographic characteristics, endoscopic and surgical interventions, morbidity, and mortality rates of patients diagnosed with LSG leak were analyzed from prospectively recorded data. Results: Leak was observed in 11 (2.15%) of a total of 510 LSG patients. Six (54%) patients were diagnosed as acute and 5 were early leaks. Stent was applied to most of the patients (72%) with or without surgical exploration. The average length of stay in hospital was 21 days. Mortality was observed in 2 patients. Conclusions: Consequently, leakage after LSG is a complication that requires multimodal therapy. Surgical treatment combined with endoscopic intervention may increase success
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