• Journal of Periodontal and Implant Science
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• 제26권3호
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• pp.715-724
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• 1996

This study was performed to identify the proliferation and to measure the alteration of alkaline phosphatase activity in human gingival fibroblasts cultured. For the present study, the authors cultured the human gingival fibroblasts oriented from the sound interdental gingiva, and used third passage. It was used methyl $[^3H]$ Thymidine to identify the proliferation in human gingival fibroblasts and used 410nm of the spectrophotometer to measure the alteration of the alkaline phosphatase activity in human gingival fibroblasts. The results were as follows: 1. There was a statistically significant increase in the proliferation of gingival fibroblasts following low level laser irradiation at 24 hour(p<0.05). 2. There was a statistically significant increase in activity of alkaline phosphatase compared to control group at 5-day laser irradiation after in laser irradiation groups(p<0.05). And there was a statistically significant increase in activity of alkaline phosphatase compared to control group at 7-day laser irradiation after in the I-minute laser irradiation group(p<0.05), but there was a statistically significant decrease in activity of alkaline phosphatase compared to 1minute laser irradiation group at 7-day laser irradiation in the 2-minute laser irradiation group after(p<0.05). The results, within the limits of the present experiments, suggest that, the low level laser irradiation accelerates the proliferation of gingival fibroblasts and alters the alkaline phosphatase activity until the restricted period.

• 한국지하수토양환경학회지:지하수토양환경
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• 제20권6호
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• pp.103-110
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• 2015

Nitro-aromatic Compounds (NACs) of explosives are structurally non-degradable materials that have an adverse effect to humans and ecosystems in case of emissions in natural due to the strong toxicity. In this study, batch test in the laboratory-scale has been conducted to find some process parameters of alkaline hydrolysis by considering the characteristics of NACs which are unstable in a base status and field application evaluation have been performed on the batch test results. Based on the experimental results of both laboratory and pilot-scale test, the optimum conditions of parameters for the alkaline hydrolysis of soils contaminated with explosives were pH 12.5, above the solid-liquid ratio 1 : 3, above the room temperature and 30 minute reaction time. In these four process parameters, the most important influencing factor was pH, and the condition of above pH 12.0 was necessary for high contaminated soils (more than 60 mg/kg). In the case of above pH 12.5, the efficiency of alkaline hydrolysis was very high regardless of the concentrations of contaminated soils. At pH 11.5, the removal efficiency of TNT was increased from 76.5% to 97.5% when the temperature in reactor was elevated from room temperature to 80℃. This result shows that it is possible to operate the alkaline hydrolysis at even pH 11.5 due to increased reaction rate depending on temperature adjustment. The results found in above experiments will be able to be used in alkaline hydrolysis for process improvement considering the economy.

• Nutritional Sciences
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• 제8권4호
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• pp.242-249
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• 2005

It is well established that zinc plays an important role in bone metabolism and mineralization. The role of zinc in bone formation is well documented in animal models, but not much reported in cell models. In the present study, we evaluated zinc deficiency effects on osteoblastic cell proliferation, alkaline phosphatase activity and expression, and extracellular matrix bone nodule formation and bone-related gene expression in osteoblastic MC3T3-E1 cells. To deplete cellular zinc, chelexed-FBS and interpermeable zinc chelator TPEN were used. MC3T3-E1 cells were cultured in zinc concentration-dependent (0-15 ${\mu}M\;ZnCl_2$) and time-dependent (0-20 days) manners. MC3T3-E1 cell proliferation by MTT assay was increased as medium zinc level increased (p<0.05). Cellular Ca level and alkaline phosphatase activity were increased as medium zinc level increased (p<0.05). Alkaline phosphatase expression, a marker of commitment to the osteoblast lineage, measured by alkaline phosphatase staining was increased as medium zinc level increased. Extracellular calcium deposits measured by von Kossa staining for nodule formation also appeared higher in Zn+(15 ${\mu}M\;ZnCl_2$) than in Zn-(0 ${\mu}M\;ZnCl_2$). Bone formation marker genes, alkaline phosphatase and osteocalcin, were also expressed higher in Zn+ than in Zn-. The current work supports the beneficial effect of zinc on bone mineralization and bone-related gene expression. The results also promote further study as to the molecular mechanism of zinc deficiency for bone formation and thus facilitate to design preventive strategies for zinc-deficient bone diseases.

• Membrane and Water Treatment
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• 제7권5호
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• pp.417-431
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• 2016

Poly(vinylidene fluoride) (PVDF) powder was treated with aqueous sodium hydroxide to obtain partially defluorinated fluoropolymers with expected properties such as improving hydrophilicity and fouling resistance. Raman spectrum and FT-IR results confirmed the existence of conjugated carbon double bonds after alkaline treatment. As the concentration increased, the degree of defluorination increased. The morphology and structure of membranes were examined. The permeation performance was investigated. The results showed that membrane's hydrophilicity increased with increase of the percentage of alkaline treated PVDF powder. Moreover, in terms of the water contact angle, it decreased from $92^{\circ}$ to a minimum of $68^{\circ}$; while water up take increased from 128 to 138%. Fluxof pure water and the cleaning efficiency increased with the increase of alkaline treated PVDF powder. The fouling potential also decreased with the increase of the percentage of alkaline treated PVDF powder. The reason that makes blending PVDF show different characteristics because of partial defluorination, which led the formation of conjugated C = C bonds and the inclusion of oxygen functionalities. The polyene structure followed by hydroxide attack to yield hydroxyl and carbonyl groups. Therefore, the hydrophilicity of blending membrane was improved. The SEM and porosity measurements showed that no obvious variations of the pore dimensions and structures for blend membranes were observed. Mechanical tests suggest that the high content of the alkaline treated PVDF result in membranes with less tolerance of tensile stress and higher brittleness. TGA results exhibited that the blend of alkaline treated PVDF did not change membrane thermal stability.

• 한국미생물·생명공학회지
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• 제17권6호
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• pp.545-551
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• 1989

알칼리성 Bacillus속 8-16 균주의 내열ㆍ알칼리성단백질 분해효소를 정제하여 그 특성을 조사하였다. 본 균주의 알칼리성 protease를 아세톤침전, CM-셀룰로즈크로마토그래피, Sephadex G-100 및 G-75 젤 여과법으로 정제하였고 비활성이 37배되게 하여 단일단백질이 될 때까지 순수정제하였다. 이 효소는 7$0^{\circ}C$ pH 11에서 pH 12 사이에서 최대 활성을 나타냈고 6$0^{\circ}C$에서는 한시간 동안 안정하였다. 이 효소의 $K_m$치는 1.3mg/$m\ell$이며 분자량 33,000으로 추정된다. 또한 이 효소는 Cu$^{2+}$ 및 Mn$^{2+}$에 의해서 약간 활성화되고 Ag$^+$, Hg$^{2+}$ 및 PMSF에 의해서 저해되므로 활성부위에 serine기가 관여하는 것으로 추정된다.

• 한국수소및신에너지학회논문집
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• 제23권2호
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• pp.117-124
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• 2012

Alkaline electrolysis needs the electrode having a low overvoltage and good corrosion resistance in alkaline solution such as KOH and NaOH, for the oxygen and hydrogen production. The commercial materials such as SUS(stainless steel)-316, Ni and NiFe were evaluated for the electrode in alkaline electrolysis. The test solution for the alkaline electrolysis used 1~9M NaOH and 1~9M KOH. The voltage increased with an increase of current density in each solution. As for the 15wt.% (about 5M) NaOH, the voltage of the tested electrode under the current density of 1.8A/$cm^2$ showed the almost same value. The voltage over the current density of 1.8A/$cm^2$ deceased in the order: Ni${\fallingdotseq}$NiFe$cm^2$ showed the almost same value. The voltage over the current density of 1.8A/$cm^2$ deceased in the order: NiFe${\fallingdotseq}$SUS-316. From the results, it was estimated that NiFe and Ni was suitable as the electrode for the alkaline water electrolysis using NaOH and KOH electrolyte.

• 한국미생물·생명공학회지
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• 제15권6호
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• pp.441-445
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• 1987

알카리성 amylase를 내는 Bacillus sp. AL-8의 알카리성 amylase 유전자를 amylase를 생성하지 않는 Escherichia coli HB101에 pBR322를 vector로 하여 형질전환하였다. E. coli도 알카리성 amylase를 생성하여 5$0^{\circ}C$에서 최적 활성온도를 가지며 5$0^{\circ}C$까지 열안정성을 갖고, pH10에서 최적 활성 pH를 나타내는 동시에 pH8-10에서 안정하였다. 알카리성 amylase 유전자가 E. coli에 형질전환되어 donor 세포와 같은 효소 성질을 갖고 있으며 pBR322로 삽입된 유전자는 pJW8에서 5.8kb이며 pJW200에서는 3.0kb로 E. coli에서 안정하게 발현되었다.

• 한국미생물·생명공학회지
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• 제20권2호
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• pp.169-177
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• 1992

토양으로부터 alkaline protease 생성능이 강한 Streptomyces griseus HC-1141을 분리하였으며, 효소생산의 최적 배양조건은 0.5 casein, 0.05 ammonium chloride, 0.1 ferrous sulfate, 2.0의 lactose, pH 8.0에서 84시간 배양했을 때이다. 효소의 정제는 ammonium sulfate 침전, DEAE-cellulose ion exchange chromatography, Sephadex G-150 gel filtration, crystallization으로 하여 53.23배 정제할 수 있었으며 polyacrylamide gel 전기영동상 단일밴드를 나타내었다.

• Journal of the Korean Wood Science and Technology
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• 제27권2호
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• pp.46-52
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• 1999

소나무 수피를 알칼리성 아황산염-안트라퀴논(AQ) 증해하고, 고도로 탐리그닌 시킬 수 있는 조건을 검토하였다. 수피의 탈리그닌은 약알칼리성 아황산염 증해 조건에서보다 알칼성 아황산염 증해 조건에서 용이하였다. 그러나 알칼리성 아황산염 증해조건에서도 수피리그닌의 90%이상을 용출시키기는 어려웠다. AQ는 알칼리성 아황산염 증해 조건에서 수피의 증해 및 탈리그닌 속도를 현저하게 향상 시킬 뿐만 아니라 탈리그닌 선택성도 개선시켰다. 결과적으로 수피에 대하여 0.2% AQ의 첨가로 90%이상의 탈리그닌이 가능하였다. 수피 알칼리성 아황산염-AQ증해시 증해온도 및 NaOH의 투여량은 탈리그닌 선택성에 대해서 큰 영향을 미치지 못하였다. 그러나 $Na_2SO_3$ 투여량은 수피의 탈리그닌 선택성에 큰 영향을 미쳐 $Na_2O$로서 30%의 $Na_2SO_3$ 투여조건에서 가장 양호한 탈리그닌을 나타내었다.

• 디지털융복합연구
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• 제15권1호
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• pp.509-517
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• 2017

최근, "웰빙" 바람을 타고, 주로 치료목적으로만 이용 되어온 이온수의 효능이 알려지면서, 이에 대한 관심이 조금씩 높아지고 있다. 이온수는 물을 전기분해 하면 쉽게 얻을 수 있는데, 전해질의 첨가 유 무와 이온 선택성 격막의 유 무에 따라 강산성, 강알칼리성, 중성 또는 알칼리성, 약산성, 약알칼리성 등의 이온수가 생성된다. 알칼리성 전해 이온수는 체내의 때를 씻게 해 주어 성인병의 증세를 서서히 없애주고, 신진대사와 혈액 점도를 낮추는데 중요한 기능을 한다. 현재 펌 촉진제의 알칼리성분을 사용하는 분야는 전무한 상태이며, 뷰티 시장의 향상과 시간단축으로 인한 수익 창출이 가능하며, 고객에게는 모발의 손상이 없고 모발의 잡균들을 제거함으로써 고객의 거친 모발에 에너지와 영양을 충전하여 손상된 모발을 빠르게 복구 할 수 있으며 염색/펌 시술 후 손상도니 머릿결을 복구 와 화학성분 제거 및 끈적임 없이 매끄럽고 윤기 있는 머릿결을 유지 할 수 있는 고효율의 알칼리성 모발후 처리제의 개발이 절실하다.