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( Edith Perez De Arce ),( Glauben Landskron ),( Sandra Hirsch ),( Carlos Defilippi ),( Ana Maria Madrid ) 대한소화기기능성질환·운동학회 2017 Journal of Neurogastroenterology and Motility (JNM Vol.23 No.2
Background/Aims Chronic intestinal pseudo-obstruction (CIPO) is a rare syndrome characterized by a failure of the propulsion of intraluminal contents and recurrent symptoms of partial bowel obstruction in the absence of mechanical obstruction. Regional variations of the intestinal compromise have been described. Intestinal manometry can indicate the pathophysiology and prognosis. Our objective is to establish the demographic and clinical characteristics of group Chilean patients and analyze the motility of the small intestine and its prognostic value. Methods Patients with symptoms of intestinal pseudo-obstruction with dilated bowel loops were included, in all of whom a manometry of the small intestine was performed using perfused catheters. Results Of the 64 patients included, 51 women (average age 41.5 ± 17.6 years), 54 primary and 10 secondary CIPO were included. Dilatation of the small intestine was the only finding in 38 patients; in the remaining, the compromise was associated with other segments, primarily the colon. Forty-nine patients underwent 65 surgeries, mainly exploratory laparotomies and colectomies. Intestinal manometry was performed on all patients; 4 “patterns” were observed: neuropathic (n = 26), myopathic (n = 3), mixed (n = 24), and a group without motor activity (n = 11). The most relevant findings were the complex migrating motor disorders and decreased frequency and propagation of contractions. The 9 patients who died had a severe myopathic compromise. Conclusions In our series, isolated small bowel compromise was the most common disorder. Neuropathic motor compromise was observed in most of the patients. Mortality was associated with severe myopathic compromise. (J Neurogastroenterol Motil 2017;23:273-280)
Quality of root canal fillings using three gutta-percha obturation techniques
Edith Siu Shan Ho,Jeffrey Wen Wei Chang,Gary Shun Pan Cheung 대한치과보존학회 2016 Restorative Dentistry & Endodontics Vol.41 No.1
Objectives: The goal of this study was to compare the density of gutta-percha root fillings obturated with the following techniques: cold lateral (CL) compaction, ultrasonic lateral (UL) compaction, and warm vertical (WV) compaction. Materials and Methods: Thirty-three extracted mandibular first molars, with two separate mesial canals in each, were selected. After instrumentation, the canals were stratified into three groups based on canal length and curvature, and underwent obturation with one of the techniques. No sealer was used in order to avoid masking any voids. The teeth were imaged pre- and post-obturation using micro-computed tomography. The reconstructed three-dimensional images were analyzed volumetrically to determine the amount of gutta-percha present in every 2 mm segment of the canal. P values < 0.05 were considered to indicate statistical significance. Results: The overall mean volume fraction of gutta-percha was 68.51 ± 6.75% for CL, 86.56 ± 5.00% for UL, and 88.91 ± 5.16% for WV. Significant differences were found between CL and UL and between CL and WV (p < 0.05), but not between UL and WV (p = 0.526). The gutta-percha density of the roots treated with WV and UL increased towards the coronal aspect, but this trend was not noted in the CL group. Conclusions: WV compaction and UL compaction produced a significantly denser gutta-percha root filling than CL compaction. The density of gutta-percha was observed to increase towards the coronal aspect when the former two techniques were used.
Determining optimum pulse mode for ultrasound enhanced biodiesel production
Edith Martinez-Guerra,,Veera Gnaneswar Gude 한국공업화학회 2016 Journal of Industrial and Engineering Chemistry Vol.35 No.-
This study evaluated the most suitable pulse mode (pulse ON–OFF pattern) for transesterification ofwaste cooking oil (WCO) using sodium hydroxide. Pulse sonication effect was investigated using ethanol,methanol, and ethanol–methanol mixtures to convert waste cooking oil into biodiesel. The importanceof duty cycle (pulse-mode operation) and the role of reaction temperature during the conversion processwere discussed. A maximum biodiesel yield of 99% was obtained for a pulse ON–OFF combination of 7 s–2 s at 150 W power output, and the optimum reaction conditions of 9:1 alcohol-to-oil molar ratio (50%-ethanol, 50%-methanol), 1 wt.% of NaOH, and 1.5 min reaction time.
Edith Lai 서울대학교 교육연구소 2014 Asia Pacific Education Review Vol.15 No.2
This paper attempts to identify leadership practices of school principals as they engaged in exploring and exploiting possibilities in and around the school contexts to build teacher capacity for change. Based on interview data of school principals, this paper shows that principals from different schools engaged in qualitatively different practices when they led their schools in building teacher capacity for school improvement. Three approaches to teacher development are identified, namely deficit approach, interactive-growth approach and participatory-growth approach, each delineating a unique set of teacher capacity building practices, teacher learning activities and contextual conditions in which they occur. Implications for developing efficacious principal leadership in teacher capacity building are discussed.
KEIRETSUS, INFLUENTIAL BANKS, AND FINANCIAL DISTRESS: EVIDENCE FROM JAPAN AND AUSTRIA
Edith A Nemec,David M Reeb People&Global Business Association 1998 Global Business and Finance Review Vol.3 No.1
In this study we examine the likeliness of financial distress in Austria and Japan. It is argued that both countries are highly comparable in respect to their bank oriented financial systems and that the keiretsu governance system in Japan lowers the probability of financial distress for member firms. We compare the relative probabilities of observed financial distress between Japan and Austria. Our evidence suggests that the probability of financial distress is lower in Japanese keiretsu firms relative to Austrian firms. Consistent with our hypothesis, we find that non-keiretsu Japanese firms and Austrian firms have similar probabilities of financial distress.
Edith E. Lopéz-Martínez,Jesús A. Claudio-Rizo,Martín Caldera-Villalobos,Juan J. Becerra-Rodríguez,Denis A. Cabrera-Munguía,Lucía F. Cano-Salazar,Rebeca Betancourt-Galindo 한국고분자학회 2022 Macromolecular Research Vol.30 No.6
Novel synthetic strategies to produce biopolymer based hydrogels for biomedical applications are required currently. Collagen hydrogels for wound healing can improve their structural and physicochemical properties by incorporating polysaccharides within the fibrillar matrix. Novel hydrogels were synthesized by semi-interpenetration of guar gum (GG) in a matrix of crosslinked collagen with hydrophilic polyurethane. GG concentrations of 10, 20, 30, and 40 wt% on the semi- IPN matrices were tested. The addition of the polysaccharide accelerates the gelling time of the hydrogels; 30 wt% of GG allows a 68 ± 5% of physicochemical crosslinking, exhibiting a maximum swelling of 3496 ± 89% and both improved mechanical and thermal resistance. The short-range interactions established in these matrices, mainly of the hydrogen bond type, make it possible to delay their hydrolytic and proteolytic degradation. The structure and properties of these hydrogels could have potential application in biomedicine as dressings for chronic wound healing, tailoring the controlled release of drugs with therapeutic interest, cell viability and proliferation, cell signaling, hemocompatibility and antibacterial character.