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Raw materials criticalities in material selection & design

Published on: 19th February, 2020

OCLC Number/Unique Identifier: 8554447253

Circular Economy, Sustainability, Design for Environment are some of the keywords that identify new formidable challenges to be faced in the next years. Raw materials have a dominant role in reaching that goal. Green energy, electric vehicles, communication, etc. depends on raw materials labeled as critical because of their economic importance coupled with high supply risk. For this reason, mitigating actions need to be used in materials selection and design such as material substitution, improved materials efficiency and recycling. In this technical communication, a method to implement raw materials criticality issues in materials selection is described according to the recent literature. The strategy is based on Ashby’s approach and the definition of the alloy criticality index quantifying the criticality per unit of mass of the material.
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Association between bh4/bh2 ratio and Albuminuria in Hypertensive Type -2 Diabetic patients

Published on: 29th December, 2017

OCLC Number/Unique Identifier: 7338866036

Endothelial dysfunction and inflammation play a key role in the pathophysiology of diabetic nephropathy; Tetrahydrobiopterin (BH4) is an essential cofactor for nitric oxide synthase, when BH4 is reduced to dihydrobiopterin (BH2), endothelial dysfunction is induced. Purpose: The aim of this study is to evaluate the relationship between the levels of biopterins with albuminuria in type-2 diabetic hypertensive patients. Methods: We studied 30 hypertensive type-2 diabetic patients in whom biopterins levels were measured by reverse phase high performance liquid chromatography with fluorescence detection. Additionally, 24 h urinary albumin excretion was also measured (nephelometry). The levels of biopterins and albuminuria were correlated with the Pearson correlation coefficient. Results: We did not find a significantly correlation between biopterins levels and albuminuria, However, we found a significantly inverse correlation (R= -0.498, p<0.005) between the BH4/BH2 ratio and albuminuria. Conclusion: Our results suggest that the BH4/BH2 ratio instead of biopterins levels may be a marker of nephropathy in hypertensive type-2 diabetic patients.
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Non-force electromagnetic fields

Published on: 9th March, 2020

OCLC Number/Unique Identifier: 8558604059

The non-force magnetic fields were first predicted by Chandrasekhar in 1956 in his well-known published work [1]. Since then there have appeared a large number of theoretical studies [5,6,15,17] with the research into various aspects of physical manifestations of non-force magnetic fields. However by now their existence in the technical physics and in laboratory experiments has not been experimentally confirmed [30]. Nevertheless the indistinct presence on the Earth of such fields was, in a sense, discovered in the natural electromagnetic field much earlier.
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A quantum mechanical model for hole transport through DNA: predicting conditions for oscillatory/non-oscillatory behavior

Published on: 9th March, 2020

OCLC Number/Unique Identifier: 8558600875

A quantum mechanical model that considers tunneling and inelastic scattering has been applied to explain the hole transfer reaction from a G (Guanine) base to a GGG base cluster through a barrier of Adenine bases, (A)n (n = 1-16). For n = 1, the ratio of tunneling to inelastic scattering is about 6, which is sharply decreased to around 0.23 and 5.23 × 10-8 for n = 4 and 16 respectively, suggesting dominance of inelastic scattering for n ≥ 4. As in experiment, the calculated product yield ratios (PGGG) exhibit a strong distance dependence for n < 4, and a weak distance dependence for n ≥ 4. We also predict conditions under which oscillatory or non-oscillatory charge transfer (CT) yield are expected.
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States Care - The Cure for Patient Healthcare

Published on: 12th November, 2019

Clinical physicians believe they are drowning . . . because they are! Between complying with an ever-changing landscape of time-wasting federal regulations, avoiding Health Insurance Portability and Accountability Act violations, plus the entire billing process, who can keep up with the literature, study a patient’s medical history, or even talk with a patient?!? 
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A Rare Case of Uvulitis Following Endotracheal Intubation Using C- Mac Videolaryngoscope and How To Avoid It

Published on: 1st October, 2024

Uvular injuries are uncommon after general anesthesia and can result from direct trauma to the posterior part of the soft palate or compression and restriction of blood flow to the uvula caused by the inadvertent placement of the airway or suction devices in the oral cavity. There have been cases of inflammation and ulceration occurring in the midline oropharyngeal structures such as the uvula after general anesthesia with a tube or laryngeal mask airway, even in the absence of direct trauma or infection, presumably due to compression ischemia. While sore throat following general anesthesia is a common symptom, it is important to evaluate any severe or persistent pain to exclude uvulitis. Here we present a case of uvulitis that developed after the insertion of a flexometallic endotracheal tube using the midline technique during C-Mac video laryngoscopy. We also emphasize the measures that can be implemented to prevent such a complication. The entrapment of the uvula during intubation often goes unnoticed due to limited oral space after insertion of the video laryngoscope blade, with the intubating anesthetist staying focused on the monitor. This complication following the use of a C-Mac video laryngoscope has not been previously documented.
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Detection limit of a lutetium based non-paralizable PET-like detector

Published on: 16th April, 2020

OCLC Number/Unique Identifier: 8586063433

The effect of the intrinsic lutetium radioactivity on the detection performances of a LYSO based in-beam PET-like prototype used for quality control of hadrontherapy treatments is studied. This radioactivity leads to a background that degrades the measurement of the β+ signal. In particular, it prevents the measurement of faint signals originating from low activity β+ sources. This paper presents a method to estimate the minimum β+ activity that can be measured for any acquisition time taking into account the non-extensible dead time of the detector. This method is illustrated with experimental data collected with the in-beam PET-like prototype. The results presented in this paper are therefore specific to this detector. The method can however be applied in other contexts, either to other lutetium based PET detectors or even to non-PET detectors affected by lutetium radioactivity. The dead time correction formalism can also be used generally to scale signal and background yields in any non-paralizable detector, even those in which the background is not due to the presence of intrinsic radioactivity.
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Measurement of background ionizing radiation in the federal university of technology owerri, Nigeria using calibrated digital geiger counter

Published on: 25th May, 2020

OCLC Number/Unique Identifier: 8621042354

The measurement of the natural ionizing radiation in the Federal University of Technology Owerri, Nigeria was carried out using a well calibrated Digital Geiger Muller counter models GCA – 04w. Measurements were taken randomly in thirty (30) diff erent locations outside the building and thirty (30) locations inside diff erent buildings in the University. Results obtained for outdoor Dose rate ranges from 0.07 μSv/hr to 0.23 μSv/hr with a mean value of 0.144 μSv/hr. While the result for the indoor dose rate ranges from 0.08 μSv/hr to 0.21 μSv/hr with a mean of 0.14 μSv/hr. The highest value recorded for the outdoor radiation is from the university front gate which is .023μSv/hr. While the highest value recorded inside the buildings is from the School of Agriculture and Agricultural Technology (SAAT) which is 0.21 μSv/hr. All these values are lower than the world safely limits of 0.247 μSv/hr. This shows that the risk of ionizing radiation on the staff and students of the Federal University of Technology is minimal.
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Kinesio taping in patients with shoulder impingement

Published on: 22nd May, 2019

OCLC Number/Unique Identifier: 8163920703

Study Design: Prospective Observational Study. Background: Physical therapy is one of the primary treatment options for these patients, however, we were unable to identify previously published research that objectively assesses the impact of taping on joint range of motion or on pain levels in patients with SAIS. This gap in the literature motivated the present study. Objectives: To describe the results of the application of neuromuscular taping in patients with subacromial impingement syndrome (SAIS), with respect to their pain levels, joint range of motion, and acromiohumeral distance, assessed via ultrasound. Methods: A prospective series of cases was evaluated at the Hospital Italiano de Buenos Aires between April and September of 2018. Twenty-four patients from age 25 to 65 were invited to participate (9 men and 15 women), all of whom had been diagnosed with rotator cuff tendinopathy, impingement syndrome, or bursitis with positive signs of impingement in the affected shoulder and anterior shoulder pain in flexion. Result: Significant changes in AHD (Figure 2), pain, and anterior flexion were registered after taping. Superficial dermatitis was detected in only two patients, but this did not affect the assessment. Conclusion: In the results obtained by this study, it has been observed that the application of neuromuscular taping using the method described above significantly increases AHD, leading to short-term improvements in pain and joint range of motion.
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Ground-state bands of doubly even 166Hf Nucleus

Published on: 15th July, 2020

OCLC Number/Unique Identifier: 8656796393

This study was carried out to investigate the rotational structure of even-even 166Hf isotopes using the phenomenological fitting, Sood’s semi-empirical formula. The rotational energies from the calculated values were compared to the experimental spectrum. The result shows that in 166Hf, calculated energies fit the experimental values to a remarkable degree of accuracy.
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