여러 가지 식품첨가제에 의한 Algin 용액의 유동 특성

김나미,박명한,전병선,박채규,양재원 한국식품영양학회 1999 韓國食品營養學會誌 Vol.12 No.2

알긴을 액상제품에 이용하기 위하여 algin의 농도와 수용액의 pH, 온도 변화에 의한 algin의 유동특성과 산미제, 감미제, 기타 첨가물이 algin의 점성에 미치는 영향을 조사하였다. 알긴 용액은 회전속도가 동일할 때는 농도가 높을수록 점도가 증가하였고 0.4% 농도까지는 dilatant형, 0.5% 이상에서는 pseudoplastic형 유체의 특성을 나타냈다. 알긴 용액의 pH가 5.5일 때 점도가 가장 높았고 pH 5.5 이하에서는 산성일수록 점도가 낮아졌으며, pH 7.0 이상에서는 점도의 변화가 없었다. 온도가 낮을수록 점도가 높았고, 가열함에 따라 용해시간이 단축되었으며 80℃이상의 가열에 의하여 점도가 다소 낮아졌다. 산미제에 의해 알긴의 점도는 pH 의존적으로 pH 3.2∼3.3에서 점도가 가장 낮았고 pH 3.0 이하에서는 gel이 형성되었다. 감미제는 알긴 용액의 점도에 영향을 주지 않았다. 무기염류 중 NaCl과 KCl은 점도를 감소시켰으며 MgCl_2와 CaCl_2는 점도를 증가시켰고, FeCl_3 첨가는 점도 증가효과가 커서 0.1% 첨가에 의햐여 gel이 형성되었다. 아미노산 중 glutamic acid는 1.0% 첨가 시에 점도 감소효과가 있었으며 다른 아미노산은 변화를 나타내지 않았다. In order to obtain data for use of algin in drink making process, solution properties of algin have been investigated at various condition of algin concentration, temperature, pH and various food additives. At same revolution velosity, viscosities of algin were increased as algin concentration raised. Algin solution showed dilatant type flow in concentration of 0.25% to 0.4%, but pseudoplastic type flow in above 0.5%. A maximum viscosity of algin was observed at pH 5.5 ad its viscosities were also decreased as the temperature increased and heating at 80℃ above. Organic acids affected on the viscosity of algin with pH dependently, and gel formed in pH below 3.0. Sweetners have no effect to the viscosity of algin. However, addition of NaCl and KCl upto 1.0% decreased a little its viscosity and CaCl_2, MgCl_2 and FeCl_3 increased the viscosity of algin. Glutamic acid decreased the viscosity of algin.

Pulse Power를 이용한 혐기성 소화 효율 증대

최한나,전용우,정윤진,홍승모 대한상하수도학회 2003 상하수도학회지 Vol.17 No.3

Anaerobic digestion is commonly used in wastewater treatment plants to stabilize sludge produced in primary and secondary treatment, to produce renewable energy as methane, and to reduce the volume of solids for ultimate disposal. Previous studies on anaerobic digestibility of primary and secondary sludge present that secondary sludge showed poor anaerobic digestibility and less gas production. The objectives of this research were to study the effects of pulse power pretreatment on anaerobic digestibility of waste activated sludge. These objectives were achieved through operation of carefully-controlled laboratory digesters under various conditions. The conclusion made from this study are as follows: 1) To maximize the efficiency of pulse power pretreatment for waste activated sludge, the optimum operation conditions for coaxial reactor with 7 rings are decided as follows; a) optimum pulse repetition rate : 110㎐, b)feeding service : once-through mode, c) optimum hydraulic retention time : 1.0-1.5sec 2) Pretreated WAS by pulse power system showed increase of SCOD, ECP, and V.A by 13.6, 4.6, and 7.1 times. 3) From the results from operation of lab scaled anaerobic digester, pulse power sludge pretreatment increased GPR from 0.39㎥gas/㎏VS_add · day to 0.66㎥gas/㎏VS_add · day and methane content from 43.9% to 87.9%. Thus, increase of methane production rate was increased by 3.4times. 4) During the steady state operation of anaerobic digester, the removal efficiency of TCOD and VS were improved by 44.6% and 31.5% respectively after pulse power pretreatment of waste activated sludge.

다시마 추출액의 점성과 향미 개선을 위한 볶음처리 조건

김나미,박명한,전병선,박채규,양재원 한국식품영양학회 1999 韓國食品營養學會誌 Vol.12 No.5

다시마 추출액의 향미와 물성을 개선하기 위하여 볶음처리에 의한 품질변화를 조사하고 최적 볶음조건을 선정하였다. 추출액의 상징액율과 고형분수율 및 조단백질 수율은 볶음온도와 시간이 증가할수록 높아졌다. Algin의 함량은 볶음온도 175℃에서 가장 높았고,회분의 함량은 볶음온도가 증가할수록 많아졌다. 추출액의 점도는 볶음온도와 시간이 증가함에 따라 낮아졌으며 175℃, 10분 볶음처리할 때 점도 감소가 뚜렷하였다. 추출액 의 pH는 볶음온도 150℃까지는 다소 낮아지는 경향이었으며 175℃ 이상의 볶음처리 시 볶음온도와 시간이 증가함에 따라 다소 높아졌다. 볶음온도와 시간이 증가함에 따라 명도(L값)은 감소하였고, 적색도(a값)과 황색도(b값)은 증가하다가 a값은 200℃ 15분처리, b값은 175℃, 30분 처리 이후에서 각각 감소되기 시작하였다. 다시마 추출액의 냄새는 175℃에서 볶음처리하였을 때 고소한 냄새가 크게 증가하고 메스꺼운 냄새가 뚜렷하게 감소되어 전체적인 기호도가 가장 높았다. 구수한 맛과 해조맛은 175℃에서 고소한 맛이 증가되면서 메스꺼운 맛이 뚜렷하게 감소되었고 200℃ 이상에서는 탄맛이 많아져 전체적인 맛의 기호도는 175℃에서 가장 좋은 것으로 평가되었다. 이상의 결과를 종 합하여 볼 때 다시마를 175℃에서 10분간 볶음처리하는 것이 다시마 추출액에서 좋지 않은 향미를 개선하고 점성을 감소시키기에 적합하였다. Roasting conditions for improvement of viscosity and sensory properties of sea tangle extracts were investigated. The supernatant %, solid yield and crude protein yield were increased by increasing of roasting temperature and times. The highest contents of algin was obtained in roasting temperature of 175℃, ash contents were increased by roasting temperature increasing. Viscosities of sea tangle extract were significantly decreased by increasing of roasting temperature and time upto 175℃ and 10 mins more than further roasting conditions. The pH of sea tangle extracts slightly decreased from 5.94 to 5.83 in the roasting of 150℃, however, at temperature more than 175℃, its pH was increased by increasing of temperature and time. According to increase of roasting temperature and time, Lightness (L value) were significantly decreased and redness (a value) and yellowness (b value) reached the highest value in the roasting of 200℃, 15 min. or 175℃, 30 min. and after that, its value were decreased. The odor characteristics showed that sea tangle extract prepared by roasting of 175℃, 10 min. was significantly low in intensity of nauseous odor and high in intensity of roasted odor and acceptability. The taste characteristics showed that sea tangle extract prepared by roasting of 175℃, 10mins was slightly reduced in intensity of savory and seaweed taste but significantly low in intensity of nauseous taste and high in intensity of roasted taste and acceptability. Overall data suggested 175℃, 10 min. was the most effective roasting conditions for improvement of viscosity and sensory properties of sea tangle extract.

원위부 신세뇨관성 산증에서 산-염기 운반체의 결손

김혜영,한진석,이정상,김현리,김진,이중건,이서진,김근호,진호준,전은실,주권욱,나기영,정우경,오지은,엄재호,궁성수 대한신장학회 2000 Kidney Research and Clinical Practice Vol.19 No.5

The purpose of this study was to elucidate whether the molecular defect of acid-base transporters in renal tubules is related to the functional defect of urinary acidification in distal renal tubular acidosis(RTA). We performed NH₄Cl, furosemide, or bicarbonate loading test to evaluate renal acidification function, and immunohistochemistry using antibodies to H^+ -ATPase, Cl^-/HCO₃^- exchanger(band-3 protein), and Na^+/K^+ -ATPase in kidney tissue in 6 patients with RTA and renal cell carcinoma patients as normal controls. Kidney tissue was obtained either by percutaneous needle biopsy(RTA) or nephrectomy(NC). The results were as follows; 1) In all six RTA patients, proton secretory defect of distal acidification was shown by a failure to lower the urine pH after NHC1 loading or furosemide test or abnormally low urine-blood pCO₂ difference during bicarbonate loading. In two patients with RTA, proximal acidification defect was combined, which was demonstrated by increased fractional excretion of bicarbonate. 2) In mal control, intense H^+ -ATPase and band-3 protein staining was observed in collecting ducts. 3) In distal RTA patients, H6+ -ATPase and band-3 protein staining was not demonstrable or markedly decreased in the intercalated cells of distal nephron. 4) In two patients who had both proximal and distal RTA, H^+ -ATPase staining was markedly decreased in the brush border of proximal tubules as well as the distal nephron. In conclusion, the defect of acid-base transporters in renal tubule was related with the functional defect of urinary acidification in distal RTA.

비강 및 부비동에 발생한 반전성 유두종의 임상-병리조직학적 고찰

노용훈,이승학,전세영,김용기,나한조,최봉남,서재홍 조선의대 1995 The Medical Journal of Chosun University Vol.20 No.2

전북지역 주요 닥나무 산지별 특성에 관한 연구

강현주(Hyun-Ju Kang),이한나(Han-Na Lee),전철(Cheol Jeon) 한국펄프·종이공학회 2013 한국펄프·종이공학회 학술발표논문집 Vol.2013 No.4

Analysis of porcine macrophage immune response to antigenic molecules and short chain fatty acids

Na-Eun Han,Eun-Joo Lee,Kwan-Sik Park,In-Sook Jeon,Hak-Kyo Lee,Ki-Duk Song,Joong-Kook Choi 충북대학교 동물의학연구소 2015 Journal of Biomedical and Translational Research Vol.16 No.2

Macrophages play an important role in both the innate and adaptive immune responses. These include phagocytosis, killing of microorganisms, antigen presentation, and induction of immune cytokines and antimicrobial genes. Macrophage activity is reported to be controlled by diverse exogenous antigenic or endogenous metabolic molecules, and the underlying mechanisms are well documented in human and mouse macrophage cells. Bacterial lipopolysaccharide (LPS) is known to be one of the most potent stimuli activating macrophages through the toll like receptor 4 (TLR4) signaling pathway. There are other antigenic molecules, such as muramyl dipeptide (MDP) and outer membrane protein A (OmpA), that are also known to activate immune cells. On the other hand, short chain fatty acids (SCFAs) such as acetate and butyrate are produced by gut microbiota and control host energy metabolism and signal transduction through GPR receptors. However, there are few studies demonstrating the effects of these molecules in macrophages from domestic animals, including domestic pigs. In this study, we attempted to characterize gene expression regulation in porcine macrophages (PoM2, Pig Monocytes clone 2) following treatment with LPS, MDP, OmpA, and two short chain fatty acids using porcine genome microarray and RT-PCR techniques. A number of novel porcine genes, including anti-microbial peptides and others, appeared to be regulated at the transcriptional level. Our study reports novel biomarkers such as SLC37A2, TMEN184C, and LEAP2 that are involved in the porcine immune response to bacterial antigen LPS and two short chain fatty acids.

Glucosamine Ameliorates Hypoxia-Induced ER Stress and Dysfunction of SGLTs through Sp1 in Renal Proximal Tubule Cells

Han Na Suh,Mi Ok Kim,Jung Min Ryu,Ji Hoon Jeon,Ho Jae Han 대한수의학회 2013 대한수의학회 학술대회발표집 Vol.2013 No.-

Glucosamine Protects Long-Term Hypoxia-Induced Mouse Embryonic Stem Cell Apoptosis through Attenuation of ER Stress: Involvement of SP1 Glycosylation and HSP70 Expression

Bit Na Seo,Jae Hong Park,Mi Ok Kim,Han Na Suh,Jung Min Ryu,Seung Pil Yun,Su Shin Park,Ji Hoon Jeon,Ho Jae Han 대한수의학회 2012 대한수의학회 학술대회발표집 Vol.2012 No.-

Delphinidin Prevents Hypoxia-induced Mouse Embryonic Stem Cell Apoptosis through Reduction of Intracellular Reactive Oxygen Species-mediated Activation of JNK and NF-κB, and Akt Inhibition

Bit Na Seo,Jung Min Ryu,Mi Ok Kim,Han Na Suh,Pil Yun,Su Shin Park,Ji Hoon Jeon,Ho Jae Han 대한수의학회 2012 대한수의학회 학술대회발표집 Vol.2012 No.-