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Effects of Cryoprotectants and Freezing Rates on Cryopreservation of Catfish, Silurus asotus Sperm
Kho, Kang Hee,Kang, Kyoung Ho The Korean Society of Fisheries and Aquatic Scienc 2004 韓國養殖學會誌 Vol.17 No.1
Milt of the catfish was stripped into immobilizing solution containing 175 mM NaCl and 30 mM Tris at pH 7.8 and was successfully cryopreserved after a stepwise freezing procedure. After stepwise thawing, motility of spermatozoa was slightly lower than that of fresh sperm. Batches of 40-80 eggs were fertilized with cryopreserved spermatozoa, after thawing and activation in solution containing 50 mM NaCl, 20 mM Tris and HCl at pH 7.8; this resulted in 62.2% fertilization success, compared to 70.6 % with fresh sperm.
Kho, Minjung,Lee, Jung Eun,Song, Yun-Mi,Lee, Kayoung,Kim, Kyunga,Yang, Sarah,Joung, Hyojee,Sung, Joohon American Society for Clinical Nutrition 2013 The American journal of clinical nutrition Vol.98 No.6
<P><B>Background:</B> Salt is essential in our diet, but excess intake is a well-established risk factor for hypertension. The presence and importance of genetic contributions to salt intake, however, are not well understood.</P><P><B>Objective:</B> The aim of this study was to examine whether a genetic predisposition and an environmental influence exist for sodium intake and salt habit.</P><P><B>Design:</B> In a twin-family cohort, half-day urine samples from 1204 individuals (133 pairs of monozygotic twins, 29 pairs of dizygotic twins, and 880 singletons) were collected to assess 24-h sodium intakes. Daily total sodium intake, sodium density per calorie (Na-D), and salt habit questions were analyzed with adjustment for other epidemiologic characteristics. We calculated heritability (h2) and intraclass correlations to examine the genetic and shared environmental contributions to total sodium intake traits.</P><P><B>Results:</B> The average sodium intake was 208.4 ± 107.0 mmol/d. Men had a higher absolute sodium intake (242.6 ± 117.4 mmol/d), but Na-D did not differ by sex. Moderate genetic influences existed (h2 = 0.31–0.34) for sodium intake and Na-D. We also found that sharing current residence rather than being a family member explained 22% of the variance in Na-D.</P><P><B>Conclusion:</B> Our findings suggest that both genetic predisposition and shared environment contribute to sodium intakes and salt habits alike.</P>
Cancelable fingerprint template design with randomized non-negative least squares
Kho, Jun Beom,Kim, Jaihie,Kim, Ig-Jae,Teoh, Andrew B.J. Elsevier 2019 Pattern recognition Vol.91 No.-
<P><B>Abstract</B></P> <P>Although biometrics is considered more competent than password-based or token-based approach in identity management, biometric templates are vulnerable to adversary attacks that may lead to irreversible identity loss. One of the promising remedies for biometric template protection is cancelable biometrics. In this paper, a novel binary cancelable fingerprint template design based on Partial Local Structure (PLS) descriptor and Permutated Randomized Non-Negative Least Square (PR-NNLS) is proposed. The PLS descriptor is an alignment-free minutia descriptor, which is conceived to be coupled with the PR-NNLS to derive a binary protected fingerprint template that satisfies non-invertibility, unlinkability, cancelability and performance criteria. The PR-NNLS formulation is unique in such a way that the noninvertible transformation is applied to the PLS descriptor dictionary instead of applying it to the minutiae descriptor, which often invites performance deterioration. The evaluations have been carried out with five subsets from FVC 2002 and 2004 databases where the proposed method is attested to fulfill the aforementioned four template protection criteria. We also analyze four privacy and security attacks targeted to cancelable biometrics.</P> <P><B>Highlights</B></P> <P> <UL> <LI> A novel alignment-free minutiae descriptor that based on Partial Local Structure (PLS) is proposed, which is beneficial to generate discriminative and compact binary cancelable fingerprint template. </LI> <LI> The non-invertible transformation of the PLS descriptor is formulated as a problem of solving randomized Non-Negative Least Square (R-NNLS) optimization problem, which is unique in a way to get rid of the performance deterioration issue when applying the non-invertible transformation directly to the minutiae descriptor for the fingerprint template protection. </LI> <LI> The revocability and the unlinkability traits of the proposed method are enabled by introducing a permutation mechanism to the R-NNLS. </LI> <LI> The proposed method is rigorously evaluated with five benchmark datasets, and four security and privacy analyses are also carried out. </LI> </UL> </P>
A report of three unrecorded Ovulid species (Gastropoda, Heterodonta) from Korea
Kho, Dong-Bum,Lee, Jun-Sang,Min, Duk-Ki The Malacological Society of Korea 2015 The Korean Journal of Malacology Vol.31 No.1
Three Ovulid species collected from Jeju Island were identified as Habuprionovolva aenigma (Azuma & Cate, 1971), Habuprionovolva basilia (Cate, 1978) and Diminovula kosugei (Cate, 1973). This is the first record from the Korean waters, providing a description of the species with illustration for the shell morphology.
KHO, Yoonjung,KIM, Sungchan,YOON, Byung Sun,MOON, Jai-Hee,KIM, Bona,KWAK, Sungwook,WOO, Junghee,OH, Sejong,HONG, Kichang,KIM, Saehun,KIM, Hyunggee,YOU, Seungkwon,CHOI, Yunjaie Japan Society for Bioscience, Biotechnology, and A 2008 Bioscience, Biotechnology, and Biochemistry Vol.72 No.1
<P>In this study, we examined the expression and functions of serum amyloid A (SAA) isoforms during apoptosis of HC11 mammary gland epithelial cells. Expression of SAA mRNAs and apoptosis were increased in HC11 cells by serum withdrawal and gradually decreased upon the addition of serum, or epidermal growth factor (EGF). TNFα treatment of HC11 cells also induced expression of SAA genes, and the effect on SAA1 and SAA2 expression was suppressed by treatment with MG132, and in cells transfected with a dominant negative mutant form of IκBα. Similar results were observed in response to interleukin-1 (IL-1), IL-6 and interferon γ (IFNγ). Furthermore, overexpression of the SAA1 and SAA2 isoforms suppressed growth and accelerated apoptosis of HC11 cells by increasing caspase 3/7 and caspase 8 activities, but the apoptotic effect of tumor necrosis factor α (TNFα) on HC11 cells was not enhanced. We found that expression of <I>SAA1</I> and <I>SAA2</I>, but not <I>SAA3</I>, was regulated by an NFκB-dependent pathway, and that overexpression of SAA isoforms accelerated the apoptosis of HC11 cells.</P>
Path intersection matrices and applications to networks
Kho, D.Y.,Kook, W.,Lee, J.,Lee, J.,Lee, K.J. North Holland [etc.] 2017 Linear algebra and its applications Vol.524 No.-
<P>For a network G, we introduce a non-singular symmetric matrix, called a path intersection matrix, that will provide a new method for computing the ratio k(G)/k(G/ab) where k(G) is the tree-number of G and G lab is obtained from GUab by contracting the new edge ab between two distinct nodes a and b. The quantities k(G)/k(G/ab) appear as invariants for various networks such as effective conductance for an electrical network and an ingredient for information centrality for a social network. We will review several examples of networks where path intersection matrices can be applied. (C) 2017 Elsevier Inc. All rights reserved.</P>
Acute Effects of Tobacco and Non-tobacco Cigarette Smoking on the Blood Pressure and Heart Rate
Kho Young-Lim,Yi Sang-Gu,Lee Eun-Hee,Chung Moon-Ho Korean Society of Environmental Health 2006 한국환경보건학회지 Vol.32 No.3
Smoking of tobacco cigarettes is associated with a rise in blood pressure together with increase in heart rate. This study was aimed to examine the acute effect of tobacco and non-tobacco cigarette smoking on the blood pressure and heart rate by randomized crossover study. In the results, systolic/diastolic blood pressure and heart rate changes after smoking were significantly different between male and female group. Blood pressure and heart rate were elevated after smoking, but statistical significance for the difference was identified only in the female group. Because Non-tobacco smoke made from leaves of E. ulmoides has no nicotine, its effect on blood pressure and heart rate was negligible. Remarkable difference of heart rate changes in women was observed between tobacco cigarette smoking group and non-tobacco cigarette smoking group.
Agora and Its Possibilities in James Joyce’s “Wandering Rocks”
Kho, Younghee 미래영어영문학회 2021 영어영문학 Vol.26 No.1
Reviving and representing the concept of agora, a central space for the politics, economy, and religion of ancient Greek city-states, this paper claims that Joyce in Dubliners and Ulysses evaluates the limitations and possibilities of Ireland as an emerging nation through the citizens’ interactions in agora. Focusing on this public space’s role for communication, the paper pays attention to the kinds and characters of communication especially in “Eveline” and “Wandering Rocks.” In the former story, Eveline is occupied in her uncommunicable concern of whether or not she has to leave Ireland, yet her agoraphobia ultimately ends her communication with others, especially with Frank who she regards as a possible savior from her stifling situation. The citizens in “Wandering Rocks” do not show such physical symptoms of agoraphobia as Eveline; however, their consciousness and communication still expose what obstructs themselves from intellectual development. The pretentious and uncharitable attitude of Dubliners, perhaps except for foreign Bloom and female Molly, marks their communication everywhere and develops a false community in this episode. Molly and Bloom, in contrast, open up possibilities for building an ideal community through the act of charity, which is particularly emphasized in this episode.