• Title/Summary/Keyword: Growth conditions

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Production and Microbiological Characteristics of Fermented Sausages (발효소시지의 생산과 미생물적 특성)

  • Benno Kunz
    • Food Science of Animal Resources
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    • v.23 no.4
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    • pp.361-375
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    • 2003
  • In this study, significant factors influencing on the quality and stability of fermented sausage, such as materials, processing conditions, and microbiological characteristics as well as topography during ripening, were documented. Since most fermented sausages are not heated during manufacture or before consumption, a strict control of the growth of pathogens and the selection of favourable conditions that encourage the specific growth and development of desirable microflora are particularly important. With respect to microbiological safety, hurdles, i.e., preservations(nitrite), redox potential, competitive flora, acidity(pH), and water activity($a_{w}$) are matters of importance to prevent proliferation of bacterial pathogens. Today, for ensuring the safety and quality of the final product, the application of starter cultures in combination with the proper processing is subsequently used in practice. For improving the efficiency of microbiological utility in the production of fermented sausages, the understanding of their topography is essential. The documented different points must be taken into account when HACCP systems set up for the manufacture of fermented sausages. There are continuous researches concerning desirable improvements to sausage fermentation with health enhancing properties.

Crystallization and In-plane Alignment Behavior of Pb(Zr, Ti)$O_3$ Films

  • Hwang, Kyu-Seog;Kim, Byung-Hoon
    • The Korean Journal of Ceramics
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    • v.3 no.3
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    • pp.191-194
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    • 1997
  • Epitaxial Pb(Zr, Ti)O3(PZT) thin films were prepared on MgO(100) substrates by dipping-pyrolysis (DP) process using metal naphthenates as starting materials, and effects of pyrolysis and final heat-treatment conditions on the film's orientation were investigated. Solid-state epitaxial growth of PZT proceeds at lower temperature around 650℃ from the precursor pyrolyzed at 350 and 500℃. The in-plane alignment of the PZT films depends not only on the final heat-treatment temperature but on the pyrolysis conditions; the films, pyrolyzed at a higher temperature for a short time, i.e., at 500℃ for 10 min, exhibited stronger orientation after the same final heat treatment at 650°∼750℃. The PZT films with the strongest orientation were prepared by pyrolysis under the above conditions followed by final heat treatment at 750℃.

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STUDY ON GLOEOSTEREUM INOARNATUM S. ITOET IMAI-FERMENTATION CULTIVATION(LIQUID FERMENTATION)

  • Jie, Tai-Long
    • Proceedings of the Plant Resources Society of Korea Conference
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    • 2001.11a
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    • pp.74-82
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    • 2001
  • It was reported in our Previous paper that the fermented products from Gloeostereum incarnatum strongly inhibit the growth of six kinds of bacteria in human bodies. In this paper the appropriated conditions of immersing culture for the strain 8 903 of Gloeostereum incarnatum was analysed. And the output of the hypha and fermentative product was determined or compared, The prelimenaryresults showed that the appropriated conditions for the growth of Gloeostereum incarnatum are: (1)culture medium:glucose 3%; protein peoptne 0.2%; soybeancake power 1%, yeast power 0.3%; KH2PO40.05%; MgSO4 0.03%; CaCO3 0.01%; vitamin Bl 0.001%; befor sterilization pH Value of six should be maintained; (2) temperature; 27$^{\circ}C$~28$^{\circ}C$; (3) time; about 200 hours; (4) ventilation; (30%~50%)/min. The sigh of the end culture we: pH coming down about 4: remnant glucoses less 1%, amino nitrogens about 20;, time about eight days. In the aforementioned conditions, the output of fermentative product achieve to 2.5 ~3g/L.

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Resveratrol Impaired the Morphological Transition of Candida albicans Under Various Hyphae-Inducing Conditions

  • Okamoto-Shibayama, Kazuko;Sato, Yutaka;Azuma, Toshifumi
    • Journal of Microbiology and Biotechnology
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    • v.20 no.5
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    • pp.942-945
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    • 2010
  • The ability of the human fungal pathogen Candida albicans to undergo the morphological transition from a single yeast form to pseudohyphal and hyphal forms in response to various conditions is known to be important for its virulence. Many studies have shown the pharmacological effects of resveratrol, a phytoalexin polyphenolic compound. In this study, we investigated the antifungal activity of resveratrol against C. albicans. Both yeast-form and mycelial growth of C. albicans were inhibited by resveratrol. In addition, normal filamentation of C. albicans was affected and yeast-to-hypha transition under serum-, pH-, and nutrient-induced hyphal growth conditions was impaired by resveratrol.

Mucin in cancer: a stealth cloak for cancer cells

  • Wi, Dong-Han;Cha, Jong-Ho;Jung, Youn-Sang
    • BMB Reports
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    • v.54 no.7
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    • pp.344-355
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    • 2021
  • Mucins are high molecular-weight epithelial glycoproteins and are implicated in many physiological processes, including epithelial cell protection, signaling transduction, and tissue homeostasis. Abnormality of mucus expression and structure contributes to biological properties related to human cancer progression. Tumor growth sites induce inhospitable conditions. Many kinds of research suggest that mucins provide a microenvironment to avoid hypoxia, acidic, and other biological conditions that promote cancer progression. Given that the mucus layer captures growth factors or cytokines, we propose that mucin helps to ameliorate inhospitable conditions in tumor-growing sites. Additionally, the composition and structure of mucins enable them to mimic the surface of normal epithelial cells, allowing tumor cells to escape from immune surveillance. Indeed, human cancers such as mucinous carcinoma, show a higher incidence of invasion to adjacent organs and lymph node metastasis than do non-mucinous carcinoma. In this mini-review, we discuss how mucin provides a tumor-friendly environment and contributes to increased cancer malignancy in mucinous carcinoma.

Essential Oil Ingredient and Metabolites Analyses in Savory (Satureja hortensis) (세이보리(S. hortensis)의 정유성분과 대사체 분석에 대하여)

  • Shin, Gyung-Soon;Cho, Tae-Dong
    • Journal of Environmental Science International
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    • v.31 no.3
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    • pp.255-263
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    • 2022
  • The relationship between environmental growth conditions of savory(Satureja hortensis) and Zn and vitamin B3 has been previously reported. Based on these results, HPLC and GC-MS were used to investigate the levels of phenolic compounds and perform metabolite analysis, respectively, in plants collected from different areas. Differences were observed in the levels of polyphenols and flavonoids depending on sampled areas and natural conditions. Next, HPLC and metabolite analyses confirmed the presence of bioactive substances. The results also showed that the longer the storage time, the higher was the content of carvacrol and of rosmarinic acid. Finally, the difference in the active ingredients was minimal when plants were cultivated under growth conditions similar to those in the place of origin.

The Nexus between FDI and Growth in the SAARC Member Countries

  • Jun, Sangjoon
    • East Asian Economic Review
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    • v.19 no.1
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    • pp.39-70
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    • 2015
  • This paper examines the effects of foreign direct investment (FDI) on South Asian economies' output growth, utilizing recent panel cointegration testing and estimation techniques. Annual panel data on eight SAARC (South Asian Association for Regional Cooperation) member countries' macroeconomic variables over the period 1960- 2013 are employed in empirical analysis. Using various heterogeneous panel cointegration and panel causality tests, a bi-directional relationship between FDI and growth is found. We find evidence for both FDI-led growth and growth-induced FDI hypotheses for the South Asian economies over the sample period. Individual member countries exhibit heterogeneity in terms of the direction or existence of causality subject to their idiosyncratic economic conditions. Among various regressors, FDI, financial development, human capital, and government consumption show the most significant positive effects on output growth. As determinants of FDI, GDP, financial development, human capital, and government consumption are found significant in the region. The bi-directional causality between FDI and growth is found robust to the inclusion of other control variables and using different estimation techniques.

Antimony Surfactant Effect on p-GaN growth by Metal Organic Chemical Vapor Deposition (MOCVD)

  • Lee, Yeong-Gon;Sadasivam, Karthikeyan Giri;Baek, Gwang-Seon;Kim, Bong-Jun;Kim, Hak-Jun;Lee, Jun-Gi
    • Proceedings of the Materials Research Society of Korea Conference
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    • 2010.05a
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    • pp.56.2-56.2
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    • 2010
  • An improvement in the optical and structural properties of p-GaN was obtained by using antimony (Sb) as a surfactant during p-GaN growth. Two different growth temperatures of p-GaN such as $1030^{\circ}C$ and $900^{\circ}C$ were considered. Keeping the growth conditions for p-GaN constant, Sb was introduced during p-GaN growth while varying the [Sb]/([Ga]+[Mg]) flow ratio. [Sb]/([Ga]+[Mg]) flow ratio will be denoted as SGM ratio for convenience. SGM ratio of 0, 0.015 and 0.03% were considered for high temperature p-GaN growth. SGM ratio of 0, 0.005, 0.01 and 0.02% were considered for low temperature p-GaN growth. The analysis results suggest that using the optimum SGM ratio during p-GaN growth greatly improves the optical and structural properties of the p-GaN.

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Hair-Growth Effect and Single Dose Oral Toxicity Test of Illite Powder (Illite 분제 원액의 육모 활성 시험 및 단회 투여 경구 독성시험)

  • 박형섭;임동술;정재훈;이충재;김박광
    • Biomolecules & Therapeutics
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    • v.9 no.4
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    • pp.307-310
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    • 2001
  • The hair-growth effect of Illite was suggested by some people who were using Illite as a beautifying material. We investigated the hair-growth effect of Illite powder. The hair-growth effects were investigated by two methods; the activity of hair-growth after shaving the hairs on the black mouse (C57BL/6) and the recovery activity of hair-growth after hair-loss induced by cyclophosphamide treatment. Suspension of Illite powder was applied to the back of the black mouse by method of skin paste. Illite promoted significantly the hair growth of mouse in both conditions of shaving and hair-loss. And then we investigated the toxicity which may be induced by Illite when it was administrated orally as a single dose. We could not fond out any significant toxicity induced by single dose oral administration of Illite.

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Estimation of Old Climate and the Radial Growth of Trees since 1782 in South Korea (1782 年 以來 韓國의 古氣候와 수種의 肥大成長推定)

  • Lee, Myung Soon;Kwang Soo Paik;Yang-Jai Yim
    • The Korean Journal of Ecology
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    • v.8 no.4
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    • pp.215-223
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    • 1985
  • The fluctuation of old climate was studied by the analysis of radial growth in trees, since 1782. For the effects of environmental factors on the radial growth, the authors proposed the relative radial growth(Rg) concept modified the emperical equation of Fritts (1969) as follow: Yt=aebt Yt: theoretical annual ring width time t a and b: constants in different tree species Rg=Yt/Yt Rg: ratio of real radial growth to theoretical growth with age Yt: real annual radial growth Used the Rg value, the relationship between climatic conditions and the radial growth during 70 years was investigated, and the fluctuations in climate during the last 200 years with the historical records was detected.

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