• Title/Summary/Keyword: Biological efficacy

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Biocontrol Efficacy of Formulated Pseudomonas chlororaphis O6 against Plant Diseases and Root-Knot Nematodes

  • Nam, Hyo Song;Anderson, Anne J.;Kim, Young Cheol
    • The Plant Pathology Journal
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    • v.34 no.3
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    • pp.241-249
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    • 2018
  • Commercial biocontrol of microbial plant diseases and plant pests, such as nematodes, requires field-effective formulations. The isolate Pseudomonas chlororaphis O6 is a Gram-negative bacterium that controls microbial plant pathogens both directly and indirectly. This bacterium also has nematocidal activity. In this study, we report on the efficacy of a wettable powder-type formulation of P. chlororaphis O6. Culturable bacteria in the formulated product were retained at above $1{\times}10^8$ colony forming units/g after storage of the powder at $25^{\circ}C$ for six months. Foliar application of the diluted formulated product controlled leaf blight and gray mold in tomato. The product also displayed preventative and curative controls for root-knot nematode (Meloidogyne spp.) in tomato. Under laboratory conditions and for commercially grown melon, the control was at levels comparable to that of a standard commercial chemical nematicide. The results indicated that the wettable powder formulation product of P. chlororaphis O6 can be used for control of plant microbial pathogens and root-knot nematodes.

Factors Affecting HPV Vaccination Rates of Daughters Aged 12 years (만 12세 초등학생 딸의 자궁경부암 예방접종 실태 및 영향요인)

  • Moon, Hee
    • Journal of Korean Biological Nursing Science
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    • v.20 no.2
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    • pp.114-121
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    • 2018
  • Purpose: The purpose of this study was to investigate the rate of human papilloma virus (HPV) vaccinations among 12-year-old daughters and to analyze factors influencing the mothers' decisions to vaccinate their daughters. Methods: A cross sectional descriptive study was conducted using a convenience sample of 139 mothers. Data was analyzed using SPSS WIN 23.0. Descriptive statistics and a logistic regression analysis were conducted. Results: The vaccination rate of HPV among children was 43.9%. Mothers showed a higher knowledge of the HPV vaccination than of cervical cancer and of human papilloma virus. In self-efficacy scores, the subscores of self-regulation efficacy were higher than self-confidence and task difficulty preference. The factors influencing the vaccination of daughters included the age of the daughters at the time of the vaccination, the provision of information on the HPV vaccine, knowledge of the HPV vaccination, and self-confidence. Conclusion: In order to increase the HPV vaccination rate, it is necessary to provide accurate scientific knowledge to mothers. A variety of intervention strategies should be developed to enhance the confidence of mothers so that mothers who want to provide the HPV vaccination to their daughters are able to follow through and provide the vaccination.

Enhanced sialylation and in vivo efficacy of recombinant human α-galactosidase through in vitro glycosylation

  • Sohn, Youngsoo;Lee, Jung Mi;Park, Heung-Rok;Jung, Sung-Chul;Park, Tai Hyun;Oh, Doo-Byoung
    • BMB Reports
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    • v.46 no.3
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    • pp.157-162
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    • 2013
  • Human ${\alpha}$-galactosidase A (GLA) has been used in enzyme replacement therapy for patients with Fabry disease. We expressed recombinant GLA from Chinese hamster ovary cells with very high productivity. When compared to an approved GLA (agalsidase beta), its size and charge were found to be smaller and more neutral. These differences resulted from the lack of terminal sialic acids playing essential roles in the serum half-life and proper tissue targeting. Because a simple sialylation reaction was not enough to increase the sialic acid content, a combined reaction using galactosyltransferase, sialyltransferase, and their sugar substrates at the same time was developed and optimized to reduce the incubation time. The product generated by this reaction had nearly the same size, isoelectric points, and sialic acid content as agalsidase beta. Furthermore, it had better in vivo efficacy to degrade the accumulated globotriaosylceramide in target organs of Fabry mice compared to an unmodified version.

Non Pharmacological Approaches in the Irritable Bowel Syndrome (과민성 장 증후군의 증상 경감을 위한 비약물적 접근 고찰)

  • Choe, Myoung-Ae;Kim, Keum-Soon;An, Gyeong-Ju;Chae, Young-Ran;Choi, Jung-An;Hong, Hae-Sook;Park, Mi-Jung;Lee, Kyung-Sook;Shin, Gi-Soo;Jeong, Jae-Sim
    • Journal of Korean Biological Nursing Science
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    • v.7 no.2
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    • pp.49-57
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    • 2005
  • There have been many trials of clinical efficacy of multi component and single component treatments for irritable bowel syndrome(IBS). We reviewed effects of non phamacological treatments in the IBS. Though the efficacy of multi-component approaches was unclear, several results suggest that cognitive behavioral therapy was effective in improving gastrointestinal symptoms of IBS. As a single component, cognitive therapy and relaxation with or without biofeedback could improve the symptoms and psychological health of IBS patients. Yoga, meditation, self-help information and hypnotherapy could be applicable to IBS.

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Inactivation of Escherichia coli and MS2 coliphage by Cu(II)-activated peroxomonosulfate in natural water

  • Kim, Hyung-Eun;Lee, Hye-Jin;Kim, Min Sik;Choi, Joon-Young;Lee, Changha
    • Membrane and Water Treatment
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    • v.10 no.3
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    • pp.231-237
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    • 2019
  • Peroxymonosulfate (PMS) in combination with Cu(II) was examined to inactivate E. coli and MS2 coliphage in natural water. The combined system (i.e., the Cu(II)/PMS system) caused a synergistic inactivation of E. coli and MS2, in contrast with either Cu(II) or PMS alone. Increasing the concentration of PMS enhanced the inactivation of E. coli and MS2, but after a certain point, it decreased the efficacy of the microbial inactivation. In the Cu(II)/PMS system, adding reactive oxidant scavengers marginally affected the E. coli inactivation, but the inhibitory effects of copper-chelating agents were significant. Fluorescent assays indicated that the Cu(II)/PMS system greatly increased the level of reactive oxidants inside the E. coli cells. The sequential addition of Cu(II) and PMS inactivated more E. coli than did adding the two simultaneously; in particular, the inactivation efficacy was much higher when Cu(II) was added first. The observations from the study collectively showed that the microbial inactivation by the Cu(II)/PMS system could be attributed to the toxicity of Cu(I) as well as the intracellular oxidative stress induced by Cu(III) or radical species.

Factors Influencing Professional Competencies in Triage Nurses Working in Emergency Departments (응급실 간호사의 중증도분류 전문역량에 영향을 미치는 요인)

  • Kim, Myoung Soo;Kang, Minkyeong;Park, Keun Hee
    • Journal of Korean Biological Nursing Science
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    • v.24 no.2
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    • pp.122-130
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    • 2022
  • Purpose: This study was conducted to identify the professional competency of nurses working in emergency medical institutions that use the Korean Triage Acuity Scale (KTAS), and to identify factors that affect them. Methods: This study collected data from 105 nurses working in emergency medical institutions from June to August 2020. For data analysis, descriptive analysis, t-test, ANOVA, Pearson's correlation coefficient, and multiple regression were performed using the SPSS 25.0 program. Results: As for the professional competency in triage, the higher the self-efficacy (β= 0.58, p< .001), the more experience they have in triage-related education (β= 0.30, p< .001), 2-4 years of clinical experience in emergency department (β= 0.19, p= .002), in case of triage alone (β= 0.24, p< .001), the higher the level of education a nurse has (β= 0.19, p= .003), the higher the professional competency in triage. These variables explained professional competency in a total of 64.2% of the participants (F = 38.30, p< .001). Conclusion: To improve nurses' professional competence in triage, introducing manpower expansion, financial support, and the provision of appropriate places is suggested. In addition, it is necessary to repeatedly provide educational opportunities in an environment similar to actual clinical practice by developing various scenarios and introducing simulations and web-based formats.

Role of Serotonin in Pathophysiology and Treatment of OCD (강박장애의 병태생리와 치료에 있어 세로토닌의 역할)

  • Kim, Chan-Hyung
    • Korean Journal of Biological Psychiatry
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    • v.4 no.2
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    • pp.179-187
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    • 1997
  • The clinical efficacy of serotonin reuptake inhibitors such as clomipramine in the treatment of obsessive compulsive disorder(OCD) has fueled interest in the neurobiological basis of this illness. OCD is responsive exclucively to potent serotonin reuptake inhibitors clomipramine, fluoxetine, fluvoxamine, sertraline, and paroxetine and this point forms the important evidence supporting a cental role for serotonin in the pathogenesis of the disorder. Other serotonergic medications such as lithium, buspirone, trazodone, or fenfluramine may be useful as adjuvant treatments in treatmentrefractory OCD and adjuvant antipsychotics are useful in tic disorders, personality disorders, and psychotic disorders. This paper reviews results of treatment studies, investigations of biological markers, and neuroendocrine challenges and implications for the role of serotonin in pathophysiology and treatment of OCD.

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Biological Response Modifiers Influence Structure Function Relationship of Hematopoietic Stem and Stromal Cells in a Mouse Model of Leukemia

  • Basu, Kaustuv;Mukherjee, Joydeep;Law, Sujata;Chaudhuri, Samaresh
    • Asian Pacific Journal of Cancer Prevention
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    • v.13 no.6
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    • pp.2935-2941
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    • 2012
  • Biological response modifiers (BRMs) can alter interactions between the immune system and cancer cells to boost, direct, or restore the body's ability to fight disease. Mice with ethylnitrosourea- (ENU) induced leukemia were here used to monitor the therapeutic efficacy of lipopolysaccaride (LPS), Bacillus Calmette Guerin (BCG) and sheep erythrocytes (SRBC). Flow cytometry based CD34+ positivity analysis, clonogenicity, proliferation and ultrastructure studies using scanning electron microscopy (SEM) of stem cells in ENU induced animals with and without BRMs treatment were performed. BRMs improved the stem-stromal relationship structurally and functionally and might have potential for use as an adjunct in human stem cell therapy.

Literature Review on Biological Effects of Gyejibokryeong-hwan against Gynaecological Diseases

  • Kim, Jung-Hoon;Shin, Hyeun-Kyoo
    • The Journal of Korean Medicine
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    • v.34 no.2
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    • pp.29-40
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    • 2013
  • Objectives: To investigate therapeutic mechanisms of Gyejibokryeong-hwan (GJBRH) against gynaecological diseases, articles on biological assay were gathered and analyzed. Methods: The articles were classified as being from domestic or international journals, and by their year of publication. The mechanisms of the biological effects against gynaecological diseases were noted. Results: Of the 14 articles analyzed, 13 were published in China and 1 was from Japan. GJBRH showed therapeutic effect against uterine and mammary gland diseases. Uterine-related diseases such as endometriosis, hysteromyoma, adenomyosis, cancer, and inflammation can be improved by the administration of GJBRH through anti-angiogenesis, anti-inflammation, the modulation of immune cell and immunoglobulin, and the regulation of hormone secretion. GJBRH also reduced mammary hyperplasia by regulating hormone and cytokine release. Conclusions: We speculate that the inhibitory effect against uterine and mammary gland diseases could be related to the therapeutic efficacy of GJBRH in improving gynaecological diseases.

Neural Circuit and Mechanism of Fear Conditioning (공포 조건화 학습의 신경회로와 기전)

  • Choi, Kwang-Yeon
    • Korean Journal of Biological Psychiatry
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    • v.18 no.2
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    • pp.80-89
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    • 2011
  • Pavlovian fear conditioning has been extensively studied for the understanding of neurobiological basis of memory and emotion. Pavlovian fear conditioning is an associative memory which forms when conditioned stimulus (CS) is paired with unconditioned stimulus (US) once or repeatedly. This behavioral model is also important for the understanding of anxiety disorders such as posttraumatic stress disorder. Here we describe the neural circuitry involved in fear conditioning and the molecular mechanisms underlying fear memory formation. During consolidation some memories fade out but other memories become stable and concrete. Emotion plays an important role in determining which memories will survive. Memory becomes unstable and editable again immediately after retrieval. It opens the possibility for us of modulating the established fear memory. It provides us with very efficient tools to improve the efficacy of cognitive-behavior therapy and other exposure-based therapy treating anxiety disorders.