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김원기,탁영준,김현재 한국정보디스플레이학회 2018 Journal of information display Vol.19 No.1
A novel organic material named ‘collodion’ was suggested as a gate insulator for amorphous indium gallium zinc oxide thin-film transistors (a-IGZO TFTs). To find the optimized condition of the collodion gate insulator (CGI), the following three parameters of collodion solution were controlled: (1) the concentration of collodion solution; (2) the number of stacked layers; and (3) the spin-coating speed. The single-layered diluted CGI (collodion:ethanol=1:1) that was fabricated with a 3 krpm spin-coating speed exhibited an acceptable dielectric strength (J < 10−10 A/cm2 in the range of 1.1 MV/cm) and a high-dielectric constant (∼6.57) for the gate insulator layer. As a result, a-IGZO TFTs with CGI showed high-field effect mobility (∼17.11 cm2/Vs).
Kim, Won-Gi,Tak, Young Jun,Kim, Hyun Jae The Korean Infomation Display Society 2018 Journal of information display Vol.19 No.1
A novel organic material named 'collodion' was suggested as a gate insulator for amorphous indium gallium zinc oxide thin-film transistors (a-IGZO TFTs). To find the optimized condition of the collodion gate insulator (CGI), thefollowing three parameters of collodion solution were controlled: (1) the concentration of collodion solution; (2) the number of stacked layers; and (3) the spin-coating speed. The single-layered diluted CGI (collodion:ethanol = 1:1) that was fabricated with a 3 krpm spin-coating speed exhibited an acceptable dielectric strength (J < $10^{-10}A/cm^2$ in the range of 1.1 MV/cm) and a high-dielectric constant (~6.57) for the gate insulator layer. As a result, a-IGZO TFTs with CGI showed high-field effect mobility (${\sim}17.11cm^2/Vs$).
Self-healing collodion baby who does not have a known pathogenic mutation
( Seong Hoon Seo ),( Sang Eun Lee ),( Soo-chan Kim ) 대한피부과학회 2018 대한피부과학회 학술발표대회집 Vol.70 No.1
Collodion baby refers to a newborn with collodion membrane covering the whole body. Most of them evolve into a form of autosomal recessive congenital ichthyosis(ARCI), but about 10% of them heal spontaneously. This mild phenotype is known as self-healing collodion baby (SHCB). To date, ALOX12B, ALOXE3, TGM1 and CYP4F22 gene mutations have been implicated in the etiology of SHCB. A boy was born at 38 weeks gestation from healthy parents. At birth, he showed collodion membrane that covered the whole body. A skin biopsy from the thigh showed pronounced hyperkeratosis with parakeratosis, but the stratum granulosum was normally present. Transmission electron microscopy findings revealed numerous lipid droplets in the thickened horny layer and the presence of unprocessed lamellar body contents in the intercellular space of the stratum corneum. Whole-exome sequencing identified a heterozygous missense mutation in ABCA12 gene. At a follow-up visit at 4 months of life, he was completely healed showing normal appearing skin. Although we could not find any homozygous or compound heterozygous mutation in the known ARCI-related genes, the patient was diagnosed as SHCB according to the characteristic clinical progression. In previous studies, there have been SHCB cases who did not show any mutations in the ARCI-related genes. Here, we report a rare case of SHCB and suggest a possibility that other unidentified genes may be involved in this case.
Congenital lamellar icthyosis (Collodion baby)
( Eun Jung Byun ),( Yu Seok Jung ),( Hei Sung Kim ),( Sang Hyun Cho ),( Jeong Deuk Lee ) 대한피부과학회 2016 대한피부과학회 학술발표대회집 Vol.68 No.1
A 1-day-old male presented with brown scales covering the whole body. He was born at 40 weeks with a birth weight of 3000 grams in a collodion membrane. His birth and family history was unremarkable. Close examination revealed generalized plate-like scales with ectropion. Autosomal recessive lamellar ichthyosis was suspected based on clinical findings and negative family histor. Genetic analysis revealed a normal karyotype. The patient received daily wet dressing and emollients. Whole body desquamation was observed after 20 days. The ichthyoses form part of a large, clinically and etiologically heterogenous group of mendelian disorders of cornification and involve most of the integument. Among them, lamellar ichthyosis is the rarest form. The diagnosis is based on clinical findings and can be confirmed with genetic testing. The affected infant has a collodion type membrane, a waxy outer layer to the skin. The collodion membrane is the result of an epidermal developmental dysfunction where the taut membrane may impair respiration. Genetic abnormalities may be associated with congenital icthyosis. Neonatal morbidity is due to infection, aspiration and hypothermia. The collodion membrane is shed 2~4 weeks after birth. Treatment is based on hydration, lubrication and keratolysis. Suitable eye care should be carried out in case of ectropion.
( Deren Ozcan ),( Murat Derbent ),( Deniz Seckin ),( Yunus Emre Bikmaz ),( Muhtesem Agildere ),( Annachiara De Sandre Giovannoli ),( Nicolas Levy ),( Berkan Gurakan ) 대한피부과학회 2013 Annals of Dermatology Vol.25 No.4
Neu-Laxova syndrome is a rare, lethal, autosomal recessive disorder characterized by intrauterine growth retardation, central nervous system anomalies, skin findings, such as ichthyosis, edema, collodion baby and harlequin fetus, facial dysmorphic features, limb anomalies and genital hypoplasia. Although it is generally a lethal condition, cases of such patients who lived beyond 6 months and 10 months of age have been reported. Here, we describe an 8-year-old boy who was born with collodion membrane, facial dysmorphic features, limb anomalies, genital hypoplasia and pachygyria. He had no major health problems over the course of 8 years of follow-up, except for mild mental/motor retardation, ichthyosis, facial dysmorphic features and limb anomalies. Based on these features, we suggest that because Neu-Laxova syndrome represents a heterogeneous phenotype, our case may be a milder variant of this syndrome or a new genetic entity. (Ann Dermatol 25(4) 483∼488, 2013)
차승훈,박석돈,오연균,강인경,최규철 ( Seung Hoon Cha,Seok Don Park,Yon Kyun Oh,In Kyung Kang,Kyu Chul Choi ) 대한피부과학회 1997 대한피부과학회지 Vol.35 No.1
A collodion baby is born with a tough, inelastic parchment-like membrane covering the whole body surface. As the meinbrane fissures and peels, a more characteristic ichthyosiform change is evident beneath the collodion membrane. Uncommonly, normal skin is found under it. We herein present two cases af collodion baby, which were confirmed as a sporadic case of lamellar ichthyosis and a case of lamellar exfoliation of the newborn, respectively, after long-term clinical observation. It is necessary that detailed genetical and molecular biological studies should be perforrned in order to elucidate the fur:damental, molecular changes that cause these dramatic cutaneous changes. (Kor J Dermatol 1997;35(1): 129-134)
Xiangting Wu,Aiyin Wang,Xiaojie Zheng,Guoxing Li,Xinjiao Dong,Mingjiang Wu 한국화학공학회 2013 Korean Journal of Chemical Engineering Vol.30 No.6
Poly-γ-glutamic acid (γ-PGA) is a novel polyamino acid formed through microorganism fermentation and biosynthesis. In the present test, membrane (PGA-C) formation by γ-PGA and collodion was performed by using 0.1%glutaraldehyde as a cross-linking agent. A study was conducted on the PGA-C adsorption of Cu2+, specifically the related adsorption equilibrium and kinetics, desorption and regeneration. The results show that with an initial solution pH=5.5and at 318 K, the static adsorption isotherm behavior of PGA-C is in compliance with the Langmuir model and is beneficial to the adsorption of the metal. Meanwhile, with the reaction lasting for 30min, adsorption equilibrium was reached with a maximum adsorption capacity up to 7.431 mg/g. The entire reaction process follows the pseudo-second-order kinetics. By using PGA-C, good regeneration results were obtained after adsorption-generation-adsorption cycling with an HCl solution (0.1 mol/L) as regeneration liquid.