• 제목/요약/키워드: Free Water

검색결과 3,579건 처리시간 0.032초

오징어 가공중 타우린 함량의 변화 및 가공 폐액중의 타우린 함량 (Change of Taurine Content in Squid Meat during Squid Processing and Taurine Content in the Squid Processing Waste Water)

  • 조순영;주동식;박신호;강현주;전중균
    • 한국수산과학회지
    • /
    • 제33권1호
    • /
    • pp.51-54
    • /
    • 2000
  • 오징어 가공 폐액 중에는 기능성 물질로 분류되고 있는 taurine이 다량 함유되어 있다는 사실이 밝혀졌기에 고부가가치 물질로서의 이용을 위한 기초 자료의 확보를 위해 본 연구가 시도되었다. 오징어 가공공장에서 각 공정별로 시료를 취하여 유리 아미노산과 taurine의 함량을 측정하고, 탈피액이나 자숙액 중의 taurine 함량을 확인하였다. 그 결과 원료, 탈피 및 자숙 오징어의 경우 proline이 $800{\~}997mg/100g$으로 가장 높은 함량을 나타내었고, 다음으로 taurine이 $730{\~}820mg/100g$으로 높았다. 자숙 오징어는 아미노산의 손실이 일어나 원료에 비해 $60{\%}$ 정도의 유리아미노산이 감소한 것으로 나타났으며, taurine의 함량도 다른 아미노산과 마찬가지로 크게 감소한 것으로 확인되었다. 조미 오징어 제품에서의 taurine 함량은 큰 변화가 없었는데, 이는 자국 전처리 과정 중에 taurine이 크게 감소한 후 조미 및 구이 공정에서는 큰 변화가 없는 것으로 판단되었다. 한편, 탈피액 및 자숙액 중의 유리 아미노산 함량은 각각 639.1 mg/100ml, 470.7ml100ml이었고, 이중 taurine 함량이 각각 144.9mg/100ml, 117.9mg/100ml로 유리아미노산의 약 $30{\%}$를 차지하였다. 이상의 결과로 오징어 가공공정 중의 탈피 및 자숙 과정 중에 유출되는 taurine을 효율적으로 회수할 수 있는 방법이 개발된다면 가공폐수의 처리는 물론이고 taurine 산업적 생산도 가능할 것으로 판단되었다.

  • PDF

메타콜린을 이용한 기도 과민반응과 체성분과의 관계 (Association of Body Composition with the Development of Airway Hyper-Responsiveness)

  • 진현정;신경철;정진홍;이관호
    • Tuberculosis and Respiratory Diseases
    • /
    • 제70권3호
    • /
    • pp.235-241
    • /
    • 2011
  • Background: The rising prevalence of asthma may be associated with the rising prevalence of obesity in developed nations. There are several studies showing that obesity increases the risk of asthma in adults. We investigated the association of each body composition scale and bronchial hyper-responsiveness. Methods: This study involved a retrospective review of the existing records for 279 subjects with respiratory symptoms, who underwent a pulmonary function test, a methacholine challenge test and a body composition test between May 2007 and June 2009. Results: Of the 279 subjects, 179 (64%) were female. There was a statistically significant difference in fat free mass and in fat free mass index between the normal bronchial responsiveness group and bronchial hyper-responsiveness group (p=0.036; p=0.000). There was no significant differences in body mass index, in fat mass and fat free mass index in the normal bronchial responsiveness group and bronchial hyper-responsiveness group in males. However in females, body mass index and fat free mass index were increased in the bronchial hyper-responsiveness group (p=0.044; p=0.000). Total body water (kg), fat free mass (kg) and soft lean mass (kg) were significantly different between the normal bronchial responsiveness group and bronchial hyper-responsiveness group (p=0.002; p=0.000; p=0.000). Conclusion: This study showed significant differences in fat free mass and in fat free mass index between the normal bronchial responsiveness group and the bronchial hyper-responsiveness group. In females, BMI, soft lean mass, and total body water showed significant differences between the normal bronchial responsiveness group and the bronchial hyper-responsiveness group. We concluded that bronchial hyper-responsiveness was associated with not only body mass index but also fat free mass index in female bronchial asthma.

2차원 익형의 자유수면 효과에 관한 연구 (A Study on Free Surface Effect of 2-D Airfoils)

  • 박일룡;전호환
    • 한국해양공학회지
    • /
    • 제9권2호
    • /
    • pp.75-82
    • /
    • 1995
  • The free surface effects on the aerodynamic performance of 2-D wings are investigated based on the potential flow approximation. The wing is represented b source and vortex distributions on the wing surface. The steady free surface effect is taken into account by source distribution on the free surface and the velocity potentials of air and water flows are obtained. Using three different techniques, namely, positive image method, inverse image method and source distribution method, numerical results are obtained for wave elevation, pressure distribution and lift coefficient with various foil sections. The wave elevation calculated by the inverse image method is shown to be very small even at higher speeds so that the free surface effect on the performance of wings is regraded negligible. However, the wave elevations by the positive image method and source distribution method are relatively high at higher speeds and accordingly the free surface effects on wings can not be neglected.

  • PDF

시간영역에서의 비선형 자유표면파문제에 대한 수치해석 (A time-domain analysis for a nonlinear free-surface problem)

  • 경조현;배광준;정상권;김도영
    • 대한기계학회:학술대회논문집
    • /
    • 대한기계학회 2002년도 학술대회지
    • /
    • pp.381-384
    • /
    • 2002
  • The free surface flow problem has been one of the most interesting and challenging topic in the area of the naval ship hydrodynamics and ocean engineering field. The problem has been treated mainly in the scope of the potential theory and its governing equation is well known Laplace equation. But in general, the exact solution to the problem is very difficult to obtain because of the nonlinearlity of the free surface boundary condition. Thus the linearized free surface problem has been treated often in the past. But as the computational power increases, there is a growing trend to solve the fully nonlinear free surface problem numerically. In the present study, a time-dependent finite element method is developed to solve the problem. The initial-boundary problem is formulated and replaced by an equivalent variational formulation. Specifically, the computations are made for a highly nonlinear flow phenomena behind a transom stern ship and a vertical strut piercing the free surface.

  • PDF

분심기음가미방(分心氣飮加味方)의 항산화능과 serotonin 대사에 미치는 영향 (The Effects of BunSimGiEumGami-Bang(Fenxinqiyinjiameifang) on Serotonin of P815 cell)

  • 임재원;정인철;이상룡
    • 동의신경정신과학회지
    • /
    • 제22권2호
    • /
    • pp.147-162
    • /
    • 2011
  • Objectives : This experiment was designed to investigate the effect of the BSGE hot water extract on serotonin biosynthesis of depression model. Methods : The cytotoxicity of the BSGE hot water extract was analyzed by MTT assay on P815 cell. The antioxidant activity was measured by DPPH free radical-scavenging activity and SOD activity on P815 cell. The quantity of 5-HT and expression of TPH-1, AAADC and MAOa mRNA was measured by of HPLC profle Analysis on P815 cell. Results : 1. The BSGE hot water extract increased DPPH free radical-scavenging activity and SOD activity on P815 cell. 2. The BSGE hot water extract increased significantly the quantity of 5-HT. 3. The BSGE hot water extract increased the expression of TPH-1 mRNA. Conclusions : This experiment shows that the BSGE hot water extract might be effective for the prevention and treatment of depression. Investigation into the clinical use of the BSGE hot water extract for depression is suggested for future research.