Exploring water and ion transport process at silicone/copper interfaces using in-situ electrochemical and Kelvin probe approaches

Publication date: Available online 19 September 2019Source: Journal of Materials Science &TechnologyAuthor(s): B. Munirathinam, J.P.B. van Dam, A. Herrmann, W.D. van Driel, F. De Buyl, S.J.F. Erich, L.G.J. van der Ven, O.C.G. Adan, J.M.C. MolAbstractIn general, packaging materials which encapsulate light emitting diodes (LEDs) and microelectronic devices offer barrier protection against several environmental hazards such as water and ionic contaminants. However, these encapsulants may provide pathways for water and ionic contaminants to reach the metal/polymer interfaces and provoke local corrosion of electronics, which is a major reliability concern for polymer encapsulated LEDs and microelectronics. As the water and corrosive constituents play a crucial role in their reliability, water uptake kinetics, interfacial ion transport and delamination behaviour of silicone coated copper model system, mimicking a typical microelectronics packaging system, is explored in the present work. Electrochemical impedance spectroscopy (EIS) integrated with attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopy studies revealed that water diffusion inside the silicone network is Fickian in nature and the evolution of the observed time constants are related to the diffusion and interfacial reactions. A decrease of impedance magnitude with time was observed in EIS measurements concurrently with water absorption bands shifting towards lower wavenumber in ATR-FTIR mea...
Source: Journal of Materials Science and Technology - Category: Materials Science 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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