Isothermal hydrogen production behavior and kinetics of bulk eutectic Mg–Ni-based alloys in NaCl solution

Publication date: Available online 19 September 2019Source: Journal of Alloys and CompoundsAuthor(s): Wei Tan, Yuan-e Yang, Yan-xiong FangAbstractTo seek bulk Mg-based alloys with excellence H2 production properties, smelted eutectic Mg–Ni-based alloys are successfully prepared by metallurgical method. The phase compositions and microstructures are tested by X-ray diffraction (XRD) and scanning electron microscope (SEM). The isothermal H2 production curves of prepared alloys in 3.5 wt% NaCl solution are collected at different temperatures by drainage method. H2 production kinetics and thermodynamics are investigated in combination with the microstructures results and fitting results of hydrolysis curves by Avrami-Erofeev equation and Arrhenius equation. The production capacity for Mg-23.5 wt%Ni (Mg23.5Ni) eutectic alloy is 706 mL g−1 with 0.92 conversion yield at 303 K. When 10 wt% La added, the production capacity and yield of Mg-23.5 wt%Ni-10 wt%La (Mg23.5Ni10La) are 679 mL g−1 and 0.98, respectively. The initial rate and final capacity for H2 production of experimental Mg–Ni-based eutectic alloys improve gradually with the rising reaction temperature. The hydrolysis apparent activation energies for Mg23.5Ni and Mg23.5Ni10La alloys are 40.56 kJ/mol and 31.72 kJ/mol, respectively. The refined lamellar microstructure and the introduced La2Mg17 active phase strongly promote the H2 production process of Mg23.5Ni10La alloy. The rep...
Source: Journal of Alloys and Compounds - Category: Chemistry Source Type: research

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Authors: Segerman F, Clarkson S, Sjöberg K Abstract Objective: The incidence of autoimmune diseases, especially inflammatory bowel disease (IBD), has increased substantially. Globally, there are vast differences varying from 0.2/105 in some Asian countries to over 80/105 in the Faroe Islands. Environmental factors have been suggested as triggers. The aim was to investigate the incidence and prevalence of IBD in the 33 municipalities in the county Scania in Southern Sweden, an area comprising 100 × 100 km with 1,274,069 inhabitants. Furthermore, we wanted to explore whether compounds ...
Source: Scandinavian Journal of Gastroenterology - Category: Gastroenterology Tags: Scand J Gastroenterol Source Type: research
CONCLUSIONS: This survey provided a comprehensive update of the present cataract surgery practices in the Republic of Korea. The results emphasized the increasing use of premium intraocular lenses, optical biometry, and topical anesthesia. PMID: 31612656 [PubMed - in process]
Source: Korean Journal of Ophthalmology : KJO - Category: Opthalmology Tags: Korean J Ophthalmol Source Type: research
Authors: Seo Y, Shin WB, Bae HW, Yoon JS Abstract PURPOSE: We sought to investigate the effects of Graves' orbitopathy (GO) and orbital decompression on lamina cribrosa depth (LCD) using spectral-domain optical coherence tomography. METHODS: Forty eyes that underwent orbital decompression to relieve compressive optic neuropathy or correct disfiguring exophthalmos in the context of GO were included. Subjects were imaged with spectral-domain optical coherence tomography before surgery and at 1 and 3 months after surgery, at which the examiner measured the LCD (distance from the anterior surface of the lamina crib...
Source: Korean Journal of Ophthalmology : KJO - Category: Opthalmology Tags: Korean J Ophthalmol Source Type: research
Authors: Kim HR, Yoon CK, Kim HW, Pak KY Abstract PURPOSE: In the present study, the volume of hard exudates (HEs) was quantitatively measured using optical coherence tomography (OCT) and the agreement and correlation with area of HEs in fundus photography were analyzed. METHODS: The medical records of patients with diabetic macular edema who underwent focal laser treatment and were followed up more than 3 months were retrospectively evaluated. An automated customized program designed for measuring HE volume was used. The HEs in each OCT B-scan binary image were measured using 512 × 128 pixels, 6 mm &time...
Source: Korean Journal of Ophthalmology : KJO - Category: Opthalmology Tags: Korean J Ophthalmol Source Type: research
ConclusionsThe radial MP2RAGE sequence could be used for fast 3D T1 mapping, to detect and characterize metastases in regions subjected to respiratory motion.Key Points• The Cartesian encoding of the MP2RAGE sequence was modified to a radial encoding. The modified sequence enabled accurate T1measurements on phantoms and on abdominal organs of mice.• Hepatic metastases were easily detected due to high contrast. Heterogeneity in T1was measured within the metastases and between each metastasis within the same animal.• As implementation of this sequence does not require specific hardware, we expect that it could...
Source: European Radiology - Category: Radiology Source Type: research
ConclusionsMYC rearrangements in DLBCL have no influence on the visual parameter necrosisPET or the semi-quantiative parameters SUVmax, MATV and TLG. Irrespective ofMYC rearrangements, necrosisPET is an independent, adverse prognostic factor for DSS.Key Points• Retrospective analysis indicates that MYC rearrangement is not associated with necrosis on18F-FDG PET (necrosisPET) scans or semiquantitative18F-FDG PET parameters.• NecrosisPETis a potential independent adverse prognostic factor for disease-specific survival in patients with DLBCL and is not influenced by the presence of MYC rearrangements.
Source: European Radiology - Category: Radiology Source Type: research
ConclusionsRadiomic signatures of GTV and PTV both had a good prediction ability in the prediction of LN metastasis, and there is no significant difference of AUC between the two groups. The proposed nomogram can be conveniently used to facilitate the preoperative prediction of LN metastasis in T1 peripheral lung adenocarcinomas.Key Points• Radiomics from peritumoral lung parenchyma increase the efficiency of the prediction for lymph node metastasis in clinical stage T1 lung adenocarcinoma on CT.• A radiomic nomogram was developed and validated to predict LN metastasis.• Different scan parameters on CT showe...
Source: European Radiology - Category: Radiology Source Type: research
Publication date: Available online 16 October 2019Source: Epilepsy &BehaviorAuthor(s): Giada Pauletto, Francesco Bax, Gian Luigi Gigli, Simone Lorenzut, Lorenzo Verriello, Elisa Corazza, Mariarosaria ValenteAbstractAim of the studyThe aim of the study was to evaluate the clinical characteristics of patients with previous stroke (either ischemic or hemorrhagic), who developed status epilepticus (SE) mimicking a stroke relapse.Materials and methodsWe performed a retrospective cohort study of patients brought to hospital by the emergency service between December 2016 and January 2018 with a stroke code as possible candida...
Source: Epilepsy and Behavior - Category: Neurology Source Type: research
ConclusionsMDCTA provides useful information for identifying the anatomical characteristics of bleeding-related BAs and nonbronchial systemic arteries for the management of patients with severe hemoptysis. However, MDCTA could not determine the individuals who need BAE through measuring diameter of BAs.
Source: Chinese Medical Sciences Journal - Category: General Medicine Source Type: research
This study compared the effects of normal salivary pH, and acidic pH found in patients with poor oral hygiene, on the durability of aesthetic archwire coated with epoxy resin and polytetrafluoroethylene (PTFE).MethodsThe posterior parts of the archwires were sectioned into 20 mm segments (N=102) and divided among six groups. Four groups were treated with different pH levels and two served as controls. The specimens were immersed in individual test tubes containing 10 ml of artificial saliva adjusted to a pH of 6.75 or 3.5. The tubes were sealed and stored in a 37°C water bath for 28 days. After 28 days, the specimens w...
Source: The Saudi Dental Journal - Category: Dentistry Source Type: research
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