• Title/Summary/Keyword: Uptake amount

Search Result 515, Processing Time 0.039 seconds

Cholesterol Uptake by Lactobacillus acidophilus: Its Fate and Factors Influencing the Uptake (Lactobacillus acidophilus에 의한 콜레스테롤의 흡착)

  • Noh, Dong-Ouk
    • Journal of Dairy Science and Biotechnology
    • /
    • v.14 no.2
    • /
    • pp.195-206
    • /
    • 1996
  • Cholesterol assimilated by Lactobacillus acidophilus ATCC 43121 was not metabolically degraded in that most of it was recovered with the cells. Cells grown in the presence of cholesterol micelles and bile salts were more resistant to Iysis by sonication than those grown in their absence, suggesting a possible alteration of cellular membranes. Cholesterol assimilation occurred during growth at pH 6.0, the amount of which was more than that by cells grown without pH control. Cholesterol assimilated by cells was recovered in the membrane fractions of cells both grown at pH 6.0 and without pH control. The effect of unsaturated fatty acids on cholesterol assimilation was not clear, since there was no significant (P> 0.05) difference in the amount taken up from micelles prepared using L-${\alpha}$-phosphatidylcholine, dioleoyl or L-${\alpha}$-phosphatidylcholine, distearoyl. Without Tween 80, little, if any, cell growth or cholesterol uptake was observed. In the presence of 0.05% Tween 80, cholesterol uptake increased dramatically as did growth. However, as the amount of Tween 80 increased beyond 0.05%, cholesterol uptake decreased while the amount of growth remained the same.

  • PDF

Studies on the Effects of Injected Amount of I131 in Uptake and Release Rate by Thyroid in Guinea Pigs 1. On the Influence of Injected Amount of Redioiodine-131 in Uptake and Release Rate by Thyroid in Male Guinea Pigs (방사성옥도(放射性沃度)(I131)의 주입량(注入量)이 기니픽 갑상선(甲狀腺)에의 섭취(攝取) 및 방출률(放出率)에 미치는 영향(影響)에 관(關)한 연구(硏究) 제(第)1보(報) 방사성옥도(放射性沃度)(I131)의 주입량(注入量)이 웅(雄)기니픽 갑상선(甲狀腺)에서의 섭취(攝取) 및 방출률(放出率)에 미치는 영향(影響))

  • Chung, Yung Chai;Shim, Sang Chil;Lee, Heung Shik
    • Korean Journal of Veterinary Research
    • /
    • v.6 no.1
    • /
    • pp.24-30
    • /
    • 1966
  • In order to observe the effect of the injected radioactive iodine-$I^{131}$ on the uptake in thyroid of normal male guinea pigs and P.B.$I^{131}$ conversion ratio of $I^{131}$ in serum, 24 matured male guinea pigs were divided in 4 groups and $35{\mu}c$, $70{\mu}c$, $140{\mu}c$ and $280{\mu}c$ per kg of body weight respectively were injected subcutaneously. 1. The uptake rates of radioactveiodine-$I^{131}$ by external counts of thyroidal uptake reached the maximum level of uptake in 24 hours after injection. 2. As the injected amount increases, the uptake rates of maximum levels and release rate were increased. 3. Uptake rate in the removed thyroid have shown no statistical in the $35{\mu}c$ and $70{\mu}c$ groups of injected guinea pigs. 4. There was no statistical significance in $140{\mu}c$ and $280{\mu}c$ groups of injected guinea pigs. 5. P.B.$I^{131}$ conversion ratio of $I^{131}$ in serum was not in proportion to injected amounts: 61.0%(35), 70.2%(70), 75.3%(140) and 64.8%(280).

  • PDF

Varietal Difference in Water Absorption Characteristics of Milled Rice, and Its Relation to the Other Grain Quality Components

  • Hae Chune, Choi;Jeong Hyun, Chi;Soo Yeon, Cho
    • KOREAN JOURNAL OF CROP SCIENCE
    • /
    • v.44 no.3
    • /
    • pp.288-295
    • /
    • 1999
  • Nineteen japonica and Tongil-type rices were selected from seventy nine Korean and Japanese rice cultivars grown in 1989 based on the water uptake behavior of milled rice under the room temperature and boiling conditions. The selected rice cultivars were investigated for water absorbability and some physicochemical characteristics of milled rice, proper water amount for cooking and sensory evaluation of cooked rice. The relationships among the tested grain properties were also examined. The highest varietal variation of water uptake rate was observed at twenty minutes after soaking in water. The maximum water uptake of milled rices at room temperature occurred mostly at about eighty minutes after soaking in water. Newly harvested rices showed a significantly lower water uptake rate of milled rice at 20 minutes after soaking, a relatively higher maximum water absorption ratio under the room temperature, and the less water uptake and volume expansion of boiled rice compared with the one-year old rice samples. The water uptake rate and the maximum water absorption ratio showed significantly negative correlations with the K/Mg ratio and alkali digestion value(ADV) of milled rice. The rice materials showing the higher amount of hot water absorption exhibited the larger volume expansion of cooked rice. The harder rices with lower moisture content revealed the higher rate of water uptake at twenty minutes after soaking and the higher ratio of maximum water uptake under the room temperature condition. These water uptake characteristics were not associated with the protein and amylose contents of milled rice ansd the palatability of cooked rice. The water/rice ratio(in w/w basis) for optimum cooking was averaged to 1.52 in dry milled rices (12% wet basis) with varietal range from 1.45 to 1.61 and the expansion ratio of milled rice after proper boiling was averaged to 2.63(in v/v basis). The water amount needed for optimum cooking was the lowest in Cheongcheongbyeo (Tongil-type rice) and the highest in Jinbubyeo, and the amount could be estimated with about 70% fittness by the multiple regression formula based on some water uptake characteristics, ADV and amylose content of milled rice as the independent variables. Nineteen rice cultivars were classified into seven groups based on scatter diagram projected by principal component analysis using eight properties related to water uptake and gelatinization of milled rice.

  • PDF

Effect of Fe Addition on Hydrogen Rich NSR Kinetics over Pt/Co/Ba/Al2O3 Catalyst (Pt/Co/Ba/Al2O3에 Fe 첨가가 수소 풍부 NSR 반응성에 미치는 영향)

  • Kim, Jingul;Jeon, Jiyong;Kim, Seongsoo
    • Transactions of the Korean hydrogen and new energy society
    • /
    • v.23 no.6
    • /
    • pp.581-587
    • /
    • 2012
  • Thermal aging effect on NSR kinetics was studied over Pt/Co/Fe/Ba/$Al_2O_3$ catalyst. The amount of $NO_x$ uptake over Pt/Co/Fe/Ba/$Al_2O_3$ calcined at $400^{\circ}C$ increased with increasing NSR temperature from $200^{\circ}C$ to $400^{\circ}C$, where amount of $NO_x$ uptake is the highest at $400^{\circ}C$ with mol ratio of $NO_x$/Ba = 0.5. Thereafter, the amount of $NO_x$ uptake at $400^{\circ}C$ decreased with the higher calcination temperature, where Pt/Co/Fe/Ba/$Al_2O_3$ catalyst calcined at $700^{\circ}C$ showed an amount of $NO_x$ uptake with the mol ratio of $NO_x$/Ba=0.062. Result of XRD and NSR showed that Fe addition into Pt/Co/Fe/Ba/$Al_2O_3$ suppressed sintering of Pt crystallites and make $NO_x$ uptake larger, compared to no addition of Fe into Pt/Co/Fe/Ba/$Al_2O_3$ catalyst. From BET result, it was found that the change of specific surface area was relatively small by the thermal aging process. Therefore, it was found that the sintering of Pt crystallites caused the decrease of $NO_x$ uptake during NSR reaction and Fe played a role to suppress the sintering process of Pt crystallites caused by thermal aging.

Effect of Temperature on $H_2$ Spillover over $Pt/H_xMoO_3$ (Pt를 담지한 $H_xMoO_3$촉매의 수소 이동 속도에 미치는 온도의 영향)

  • 김진걸
    • Journal of the Korea Academia-Industrial cooperation Society
    • /
    • v.5 no.2
    • /
    • pp.114-117
    • /
    • 2004
  • Rates of $H_2$ uptake into $Pt/MoO_3$ were measured for the noncalcined and $200^{\circ}C$ calcined $Pt/MoO_3$. Amount of $H_2$ uptake for $200^\circ{C}$calcined $Pt/MoO_3$ was greater than the amount of noncalcined $Pt/MoO_3$. From these two experiments, it was found that the rates of $H_2$ desorption were proportional to the increase of desorption temperature. XPS demonstrated that Cl reduced more faster in ITR after calcination at $200^{\circ}C$. This inducd smaller amount of residual chlorine at adlineation sites between Pt and $MoO_3$ substrates. This resulted in opening the more channel of hydrogen pathway into more $MoO_3$particles and controled the kinetics of hydrogen uptake.

  • PDF

Effects of Different Nitrogen Application Levels on Yield and Protein Content of Rice Varieties in Korea

  • Jinseok Lee;Jong-Seo Choi;Shingu Kang;Dae-Woo Lee;Woonho Yang;Seuk-Ki Lee;Su-Hyeon Sin;Min-Tae Kim
    • Proceedings of the Korean Society of Crop Science Conference
    • /
    • 2022.10a
    • /
    • pp.123-123
    • /
    • 2022
  • In order to evaluate the effect of nitrogen application levels on yield and protein content of rice varieties, a field experiment was conducted at National Institute of Crop Science of Korea in 2020. Five levels(0, 3, 5, 7, and 9 kg·10a-1) of nitrogen fertilizer were treated to six Korean rice varieties. The nitrogen uptake amount, soil nitrogen content before and after rice cultivation, milled rice yield, and protein content in head rice were analyzed. As the treatment of nitrogen fertilizer increased, the nitrogen uptake amount of plants increased significantly. However, changes in nitrogen content in the soil before and after rice cultivation were different for each cultivar. The amount of nitrogen change in the soil decreased as the amount of nitrogen application increased in the three cultivars of Haepum, Gopum, and Odae, and the other three cultivars showed the opposite trend. As a result of correlation analysis of nitrogen application amount, nitrogen uptake amount, milled rice yield, and protein content of head rice, the five varieties except for Haepum showed a high correlation between these factors. The amount of nitrogen application and nitrogen uptake of plant showed a positive correlation about the milled rice yield and protein content of head rice. In particular, the protein content in head rice appeared to be more affected by nitrogen uptake amount than nitrogen application amount. As a result of this study, the yield and protein content of rice had positive correlations with the level of nitrogen fertilizer, and had a high correlation with the nitrogen absorption of plants.

  • PDF

Comparative Analysis on Concentration and Uptake Amount of Major Mineral Nutrients in Plant Tissues and Years Old of Panax ginseng C. A. Meyer (인삼의 연생과 식물체 부위별 무기영양성분 함량과 흡수량 비교)

  • Park, Seong-Yong;Lee, Gyeong-A;Heo, Su-Jeong;Jeong, Haet-Nim;Song, Beom-Heon
    • Korean Journal of Medicinal Crop Science
    • /
    • v.20 no.3
    • /
    • pp.195-201
    • /
    • 2012
  • The management and the use of major mineral nutriments such as nitrogen, phosphorous, and potassium, etc have been practiced and improved in various cultivating methods of Panax ginseng C. A. Meyer. The purposes of this study were to examine the content of major mineral nutrients on different ginseng aging from 1 to 6 years old, to analyze their uptake and utilization in tissues of ginseng, and to find out their proper managing techniques throughout the cultivation of ginseng. In case of the leaves, the N content was not clearly different from 1 to 6 years old, while the content of P and K was generally decreased throughout the cultivating years. In case of the roots, the content of N and K was gradually decreased from 1 to 6 years old, while the P content was increased until 3 years old, decreased at 4 years old, increased again at 5 years old, and decreased again at 6 years old. The uptake amount of N was increased in root of ginseng from 1 to 6 years old, 0.02 to 2.79kg/10a based on dry weight, respectively. Other minerals of P, K, Ca, and Mg were increased for the cultivating year. Comparing the uptake amounts of N, P, K with different cultivating year, they were the highest uptake amount at 4 years old and then were decreased. The management techniques of major mineral in cultivation of ginseng would be studied and evaluated more in order to have better ginseng production.

Relationship among Grain Yield, Nitrogen Efficiency and Nitrogen Uptake Amount in Rice Plant (수도(水稻)에서 수량(收量), 질소효율(窒素效率) 및 질소흡수량(窒素吸收量)의 상호관계(相互關係))

  • Park, Hoon
    • Korean Journal of Soil Science and Fertilizer
    • /
    • v.7 no.3
    • /
    • pp.147-154
    • /
    • 1974
  • Relationship among grain yield (Y) nitrogen efficiency (E) and nitrogen uptake amount (N) was investigated using the data from Korea and Japan in order to find out the way of increase nitrogen efficiency. The relationship between E and N could be grouped in various classes. In each class the equation. Y=EN=(b-aN)N, is valid where b is a theoretical maximum of E and a is the E/N at theoretial maximum yield. Present technique for high yield in the rice research seems to achieve 56.8 of nitrogen efficiency with 15.5kg of nitrogen uptake. Future target appears to be 63 of efficiency with 17kg of nitrogen uptake at which some farmers in Japan might reach already. It seems that the increase of nitrogen uptake for high yield is restricted without increase of nitrogen efficiency. The increase of efficiency and uptake amount of soil nitrogen seems essential to increase total nitrogen efficiency.

  • PDF

Effects of ATP and ADP on iron uptake in rat heart mitochondria

  • Kim, Mi-Sun;Song, Eun-Sook
    • Animal cells and systems
    • /
    • v.14 no.4
    • /
    • pp.245-252
    • /
    • 2010
  • Iron uptake in mitochondria and fractionated mitochondria compartments was studied to understand iron transport in heart mitochondria. The inner membrane is most active in iron uptake. Mitochondrial uptake was dependent on iron concentration and the amount of mitochondria. Iron transport was inversely proportional to pH in the range of 6.0 to 8.0. Iron transport reached a maximum after 30 min of incubation at $37^{\circ}C$. Iron uptake was inhibited by 1 mM ATP and stimulated by 1 mM ADP. The oxidative phosphorylation inhibitor oligomycin inhibited iron uptake, but rotenone and antimycin A did not. The divalent ions $Mg^{2+}$, $Cu^{2+}$, $Mn^{2+}$, and $Zn^{2+}$ suppressed iron uptake at $10\;{\mu}M$ and stimulated it at 1 mM. The divalent ion $Ca^{2+}$ stimulated iron uptake at $10\;{\mu}M$ and suppressed it at 1 mM, competing with iron. The uptake of calcium was stimulated by 10 to $1000\;{\mu}M$ ATP, while iron uptake was stimulated reciprocally by 10 to $1000\;{\mu}M$ ADP, suggesting that these ions have movements similar to those of ATP and ADP.

Influence of Alkali Activator Type and Amount of Addition on CO2 Uptake of GGBFS Geopolymer Pastes Containing Zeolite (알칼리계 활성화제의 종류 및 첨가량이 고로슬래그-제올라이트 지오폴리머 페이스트의 탄소포집에 미치는 영향에 관한 연구)

  • Jang-Hyun Park;Hyo-Min Kim
    • Journal of the Korean Recycled Construction Resources Institute
    • /
    • v.11 no.2
    • /
    • pp.112-119
    • /
    • 2023
  • In this study, the variations in CO2 uptake according to the type and amount of alkali-based activator (Ca(OH)2, CSA) of geopolymer paste were evaluated. As the amount of activator added to the geopolymer paste increased, the fluidity of the paste is decreased and the compressive strength increased. According to the type of activator, it was confirmed that the addition of Ca(OH)2 had a greater effect on improving the compressive strength than CSA. As a result of changes in chemical properties according to carbonation curing, the amount of C-S-H and C-A-S-H gels produced before carbonation increased as the amount of activator increased, and amount of CaCO3 produced after carbonation increased. The reactivity of the blast furnace slag and zeolite increased due to the addition of the activator, and the reactivity tended to increase as the amount of addition increased. As a result of CO2 uptake, 10.3 wt% when Ca(OH)2 10 % was added and 8.77 wt% when CSA 10 % was added was confirmed. It increased by 421 % and 388 % respectively, compared to the case where no activator was added.