• Title/Summary/Keyword: KNO

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Growth and Microsomal ATPase Activity of Lettuce(Lactuca sativa. L.) Cultured in the $KNO_3-Added$ Nutrient Solution (($KNO_3$를 첨가한 양액에서 상추의 생육 및 마이크로솜 ATPase 활성 변화)

  • Lee, Gyeong-Ja;Kang, Bo-Goo;Kim, Hyun-Ju;Min, Kyeong-Beom;Kim, Young-Kee
    • Korean Journal of Environmental Agriculture
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    • v.20 no.1
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    • pp.28-33
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    • 2001
  • Lettuces were grown hydroponically in three different nutrient solutions, normal and 30 or 50 mM $KNO_3-added$ nutrient solutions, and the electrical conductivities of the nutrient solutions were 1.0, 4.5, and 6.5 dS/m, respectively. Lettuces grown in the $KNO_3-added$ nutrient solutions showed a decrease in the germination ratio and the lower indices of growth, such as plant height, stem diameter, leaf length, and leaf width. Microsomes were prepared from the roots of lettuce and characteristics of microsomal ATPases were investigated. The activities of microsomal ATPases grown in the 30 mM and 50 mM $KNO_3-added$ nutrient solutions were higher than that grown in the normal nutrient solution. The highest activities of microsomal ATPases were observed at pH 7.0 in all culture conditions. The activities of microsomal ATPases were increased in a reaction buffer solution containing high concentration of $K^+$, whereas they were decreased in a reaction buffer containing $Na^+$. The stimulating effect of $K^+$ in the reaction buffer was greater on the microsomal ATPases of lettuces grown in the $KNO_3-added$ nutrient solutions than that grown in the normal nutrient solution. These results imply that the activities of microsomal ATPases in the root tissue are increased as increasing the $KNO_3$ concentration in the hydroponical nutrient solution.

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Effect of Priming Treatments on Seed Germination and Seedling Growth of Sorbus alnifolia (Priming 처리가 팥배나무의 종자 발아 및 유묘 생장에 미치는 영향)

  • Seo, Byeong-Soo;Choi, Chung-Ho;Park, Woo-Jin
    • Korean Journal of Plant Resources
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    • v.22 no.1
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    • pp.5-12
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    • 2009
  • Seed priming is a useful technique for rapid and uniform seed germination as well as early seedling establishment. This experiment was conducted to find out the optimum condition for Sorbus alnifolia seed priming with four concentrations of four reagents in germination property and seedling growth performance. The results are summarized as follows: Percent germination (PG) varied 2.67% to 24.67%, and S. alnifolia seeds had the highest PG in the treatment that were primed in 100mM $KNO_3$ solution for 2 days. Mean germination time was the shortest in 200 mM $KNO_3$ solution for 2 days. Seed priming with $KNO_3$ solutions increased germination speed (GS) and germination performance index (GPI) compared with non-primed seeds. Especially seed primed with 100 mM $KNO_3$ solution for 2 days showed the highest GS and GPI. The highest relative growth rate (RGR) and seedling vigor index (SVI) was significantly (p<0.05) different from the control and other treatments, respectively. RGR of height (0.0071) and root collar diameter (0.0141) of seedling from primed seeds were the highest in 400 mM NaCl solution for 2 days. The highest SVI (5.43) was observed in the seedlings from seeds primed in 100 mM $KNO_3$ solution for 2 days. Consequently, the optimum reagent and concentration were $KNO_3$ and 100 mM for the effective germination and seedling growth in S. alnifolia

A Study on Acceleration Aging Characteristics of B-KNO3 Igniter (B-KNO3 점화제의 가속 노화 특성 연구)

  • Paik, Jong Gyu;Ryu, Byung Tae;Kwon, Mira
    • Korean Chemical Engineering Research
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    • v.52 no.2
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    • pp.166-174
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    • 2014
  • This research investigated the aging properties of the $B-KNO_3$ system as the igniter. The $B-KNO_3$ system showed the degradation in ignition properties depending on the method and period of storage. It should be found out the cause of the degradation to predict the reliability of the igniters. The changes of the properties by the degradation after aging tests were analyzed by microstructure analysis, XRD analysis and thermal analysis using DSC. It was found out that the lattice parameters of the $KNO_3$ as the oxidizer in the ignition system was changed into the JCPDS values as the aging time increased. Conclusively, the changes of the crystal structure of oxidizer affected the activation energy increasing as aging time increased.

A study on the ZNR (Zinc Oxide Nonlinear Resistor) with $KNO_3$ ($KNO_3$의 첨가가 ZNR (Zinc Oxide Nonlinear Resistor)에 미치는 영향에 관한 연구)

  • 안영필;김복희
    • Journal of the Korean Ceramic Society
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    • v.17 no.3
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    • pp.133-140
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    • 1980
  • Nonohmic properties of ZnO ceramics with various small amounts of additives were studied in relation to sintering temperature and additive content. The kinds of additives used were basic additives ($Bi_2O_3$, $BaCO_3$, $MnCO_3$, $Cr_2O_3$) and $KNO_3$ Especially this study has focused on the effects of $KNO_3$ in ZnO ceramics with basic additives. SEM studies indicated that microstructures of ZnO, $KNO_3$ and basic additives showed homogenuous grain size in comparison to ZnO and basic additives compounds. The nonohmic exponent ($\alpha$) in ZnO, $KNO_3$ and basic additives component were measured as high as 40.

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Comparison of Productivity According to Sawdust Size and Effect of Additives for Sawdust Cultivation of Shiitake (표고톱밥재배시 톱밥 크기 및 첨가제의 혼합 여부에 따른 생산성 비교)

  • Lee, Bong-Hun;Bak, Won-Chull;Ka, Kang-Hyeon;Ryu, Sung-Ryul
    • The Korean Journal of Mycology
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    • v.36 no.1
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    • pp.36-40
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    • 2008
  • Studies were processed to confirm the differences of productivity according to sawdust size and effect of additives for sawdust cultivation of shiitake. In results of investigation until shiitake mycelia fully spread on surface of sawdust medium, mycelial growth in treatment of sawdust size $3{\sim}5\;mm$ with $CaCO_3$ and $KNO_3$, and treatment of sawdust sizw $3{\sim}5\;mm$ without $CaCO_3$ and $KNO_3$ was the fastest. And, in investigation of rate of weight reduction, treatment of sawdust size below 1 mm without $CaCO_3$ and $KNO_3$ was the highest. The tendency of fruiting was somewhat different according to treatments. In case of sawdust size below 1 mm with $CaCO_3$ and $KNO_3$, yield produced from 1st to 2nd flushing period was over 80%. However, in case of sawdust size below 1 mm plus $5{\sim}7\;mm$ without $CaCO_3$ and $KNO_3$, yield produced from 3rd to 4th flushing period was more than it from 1st to 2nd flushing period and rate of yield produced from 1st to 2nd flushing period to total yield was 34%. Results of investigation on productivity, yield and the number of fruit-bodies were remarkably different according to treatments. Sawdust size $3{\sim}5\;mm$ with $CaCO_3$ and $KNO_3$, whose total yield and the number of fruit-bodies were 568 g and 67, respectively, was the highest. And, total yield of medium of sawdust size below 1 mm plus $2{\sim}3\;mm$ without $CaCO_3$ and $KNO_3$ was lowest as 227 g and the number of fruit-bodies of medium of sawdust size below 1 mm plus $5{\sim}7\;mm$ without $CaCO_3$ and $KNO_3$ was lowest as 24. In investigation on amount of fruit-bodies over 10 g, medium of sawdust size $3{\sim}5\;mm$ with $CaCO_3$ and $KNO_3$ was highest as 397 g.

Effects of Presown Cold Stratification, $GA_3,\;KNO_3$ and Acetone Treatment on Germination of Crotalaria sessiflora L. (저온, $GA_3,\;KNO_3$ 및 Acetone 처리가 활나물 종자발아에 미치는 영향)

  • Kang, Jin-Ho;Kim, Yu-Jin;Jeon, Byong-Sam
    • Korean Journal of Medicinal Crop Science
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    • v.9 no.2
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    • pp.124-129
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    • 2001
  • Crotalaria sessiflora is one of a few medicinal herbs among the legumes used as antitumor herb medicine but has lower seed germination and afterward seedling emergence. This study was carried out to elucidate the effects of cold stratification as presown treatment as well as $GA_3$, $KNO_3$ and acetone on its seed germination and seedling emergence. Cold stratification, $GA_3$, $KNO_3$ and acetone treatments were performed with different concentrations and period levels. Cold treatment was done under 14 hour red light illumination a day or darkness and the two others under darkness. On the basis of the best germination rate of each treatment, $GA_3$ and cold stratification treatments showed the highest germination rates at 0.1 mM but 12 hours and 2 week periods under darkness, respectively. $KNO_3$ and acetone treatments came out at 400 mM and 200 mM lasted for, respectively. The best germination rates from $KNO_3$ and acetone were comparatively higher than those from the former $GA_3$ and cold treatments. In evaluation of seedling emergence using the last two treatments, $KNO_3$ treated seeds were better performed than acetone treated seeds showed somewhat higher germination rate, implying that presown seed treatments must be evaluated by the combination with indoor and field tests.

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Effect of Seed Priming on the Germination Performance and Membrane Integrity of Tomato(Lycopersicon esculentum Mill.) Seeds (Priming 처리에 의한 토마토 종자의 발아력과 Membrane Integrity에 미치는 영향)

  • Kang, Jum-Soon;Son, Beung-Gu;Ahn, Chong-Kil
    • Journal of Bio-Environment Control
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    • v.12 no.4
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    • pp.221-227
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    • 2003
  • The objective of this research was to determine the effect of seed priming on membrane integrity during poriming and germination. Among the five chemicals, $KNO_3$at 150 mL gave the shortest $T_{50}$ (days required to reach 50% of the final germination percentage). Compared to unprimed, the seeds primed with 150 mL $KNO_3$ at 20$^{\circ}C$ for 4 days had reduced $T_{50}$ values when germinated at 15$^{\circ}C$. These results indicated that seed priming is an effective way for rapid and synchronized germination, especially at low temperature. Changes in conductivity of priming solutions during the 4-days period of priming were highly dependent upon the priming agents. Conductivity of the $KNO_3$ and $K_3PO_4$ solution slowly declined during the first 3 hours ad then increased Amount of amino acids, sugars and proteins exuded from seeds into $KNO_3$ solution were less than those into distilled water and $K_3PO_4$. All the results suggested that the $KNO_3$ priming play a positive role in regulating the permeability of cell membranes.

In Vitro Propagation of Zanthoxylum piperitum DC. - II. Effect of $NH_4NO_3, KNO_3$ and Casein hydrolysate on Somatic Embryogenesis- (초피나무 (Zanthoxylum piperitum DC) 의 기내증식 - II. $NH_4NO_3, KNO_3$ Casein hydrolysate의 기내 부정배 발생효과 - ( In Vitro Propagation of Zanthoxylum piperitum DC. - II. Effect of NH4NO3 , KNO3 and Casein hydrolysate on Somatic Embryogenesis - ))

  • 송원섭
    • Korean Journal of Plant Resources
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    • v.8 no.2
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    • pp.153-157
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    • 1995
  • Embryogenic callus induces from shoot tip and leaf segment of Zanthoxylum piperitum for producing somatic embryogenesis and plant regeneration were cultured in vitro on Murashige and Tucker's(MT) medium treated with casein hydrolysate $NH_4NO_3$, $KNO_3$ and plant growth regulator. The most effective somatic embryogensis was observed in the medium added by two fold $NH_4NO_3$(3300mg/l)+2. 4-D 0.1mg/l and $KNO_3$(3800mg/l)+2.4-D 0.1mg/l. Also, MT medium supplemented with casein hydrolysate 700mg/l added by 2, 4-D 0.1mg/l were effective in obtainingn somatic embryos from embryogenic callus The effect ofm MT medium supplemented with casein hydrolysate without 2, 4-D was lower than that with (3300mg/l) 2, 4-D for the formation of somatic embryos.

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Ignition of Solid Propellants at Subatmospheric Pressures (대기압 이하에서 고체 추진제의 점화 특성 향상 연구)

  • Kim In-Chul;Ryoo Baek-Neung;Jung Jung-Yong
    • Proceedings of the Korean Society of Propulsion Engineers Conference
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    • 2006.05a
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    • pp.383-386
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    • 2006
  • Several HTPB/AP and HTPB/AP/HMX propellants were investigated experimentally for ignition characteristics in subatmospheric pressure. The threshold ignition pressure was 4psia for HTPB/AP composite propellant. The partial replacement of AP in HTPB/AP composite propellant by $5\sim15%$ of HMX, HNIW showed improvements in the threshold pressure was below 0.4psia. This appears to be due to the exothermic dissociation characteristics of HMX and HNIW at lower temperature $(\sim220^{\circ}C)$ than that of AP. The ignition substance B/KNO3 was coated thinly on the propellant surface for better ignition effect. As a result, ignition delay time of 15% was improved. NC is applied to $B/KNO_3$ ignition substance as a secondary binder and $NC-B/KNO-3$ suspension solution is coated to the propellant surface.

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Improvement of Rice Seedling Emergence by Seed Coating Materials in Direct Seeding into Flooded Paddy Soil (벼 담수토중직파재배시 종자분의 재료에 따른 입모향상 효과)

  • 원종건;최충돈;이외현;이상철;김칠용;최부술
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.42 no.3
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    • pp.286-291
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    • 1997
  • This experiment was carried out to improve seedling emergence and establishment in paddy rice sown into puddled soil. Rice seed were coated with CaO$_2$, KNO$_3$ and acid sulphate soil. When coated seeds with CaO$_2$, KNO$_3$ and acid sulphate soil were sown into puddled soil, soil redox potential was increased and the period of oxidizing was longer in KNO$_3$ than that of any other soils. pH was higher in control than that of coated seeds with CaO$_2$, KNO$_3$ and acid sulphate soil. It seems that the coated seeds oxidize soil locally, thus prohibit soil reduction. Seedling emergence was improved by seed coating materials. Emergence date was 8 days after seeding(DAS) in CaO$_2$, 14 DAS in acid sulphate soil, 21 DAS in KNO$_3$ coated seed and 20 DAS in uncoated seed, respectively. Emergence rate was highest in CaO$_2$ coated seed(80%) followed by acid sulphate soil coated seed(61%), while control(46%) and KNO$_3$(42%) were very poor. This result would be interpreted as the difference in oxidizing power among coating agents ; CaO$_2$ and acid sulphate soil may oxidize weakly and shortly while KNO$_3$ may oxidize soil strongly and persistantly. Our results suggested that local oxidizing around rice seed sown into puddled soil enhanced seedling emergence and also found a possibility to promote seedling emergence with acid soil.

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