• 환경위생공학
• /
• 제10권1호
• /
• pp.12-24
• /
• 1995

I tried to evaluate the reason of the monthly variation of water quality according to the hydrologic character of Pal- dang reservoir inflow variation. The result of this study is as below; 1 ) COD, BOD, Total- nitrogen and Total- phosphate concentration increase generally according to the flux and Total- phosphate concentration is the most affected item by flux. 2) COD, BOD, Total- nitrogen and Total- phosphate concentration increase according the flux, but they begin to decrease at the below point ; COD · 1,154 CMS, BOD : 1,007 (CMS cubicmeter per second ) and Inflow- Concentration interrelation formula is as below; table omitted.

• Journal of Microbiology and Biotechnology
• /
• 제1권1호
• /
• pp.79-83
• /
• 1991

The effects of phosphate concentration in the medium, feeding of biosynthetic precursor, and the addition of exogenous berberine on cell growth and berberine production were studied in cell suspension cultures of Thalictrum rugosum. The depletion of phosphate in the medium enhanced the specific productivity up to twofold with significant release of berberine into the medium. Extracellular berberine was 19% of the total in the culture without phosphate while it was 2-5% of total berberine in the culture with even low amounts of phosphate. Precursor feeding was not effective in enhancing alkaloid formation. Initial presence of exogenous berberine did not have much effect on cell growth and alkaloid production. It was found that the cells have the capacity to take up large quantities of berberine. When $500{\;}mg{\cdot}l^{-1}$ of berberine was added exogenously at the beginning, 81% of total berberine was found in the cells.

• 한국연초학회지
• /
• 제13권2호
• /
• pp.71-79
• /
• 1991

The experiment was conducted to investigate accumulation o( phosphate in tobacco production area. The results are as follows: 1) The content of available P in burley production area was about 200ppm higher than that in flue-cured tobacco production area, the available P content of 20% tobacco fields surveyed was above 1000ppm P. 2) Tobacco fields having 200ppm of available P which were grouped as medium category for phosphate recommendation were more than 90% out of tobacco fields surveyed. 3) Total phosphate content was above 4000ppm in 42.5% burley tobacco fields before transplanting, and 2000~3000ppm in about 40% flue-cured tobacco fields. 4) Phosphate fractions in soil increased in order of Al-P > Fe-P > Ca-p, and their content was about 50% of total phosphate in tobacco fields surveyed. 5) pH value in most of tobacco fields surveyed ranged from 4.5 to 5.0 and, field soils with pH value below 5.5 were 64 %.

• 한국생물공학회:학술대회논문집
• /
• 한국생물공학회 2002년도 생물공학의 동향 (X)
• /
• pp.403-406
• /
• 2002

This experimental shows the possibility of using as biofertilizer, which convert insoluble inorganic phosphate salts to plant-usable phosphate type by immobilized microorganism with calcium alginate. In the case of culture of P. agglomerans on constant medium pH, phosphate was produced 357 mg/L after 18hrs. And in the case of culture of immobilzed P. agglomerans bead, phosphate was produced maximum 295.6 mg/L after 120 hrs. Also as using rock phosphate as insoluble phosphate salts, phosphate was respectably produced 190.3 and 195.2 mg/L after 36 hrs at free cells and immobilized cells. In our experiments, the using soils contained 23.16 g-P/kg-soil total phosphate and 3.76 g-P/kg-soil soluble phosphate. The result of 1g immobilized bead seeding, soluble phosphate was produced maximum 6.14 g-P/kg-soil phosphate and this value was increased continuously.

• 한국산학기술학회논문지
• /
• 제18권10호
• /
• pp.603-610
• /
• 2017

탄약을 포함한 다양한 산업 분야에서 사용되는 철강 재료는 부식에 취약하므로, 표면 그대로 사용하는 것은 바람직하지 않다. 따라서 도금, 도장, 화성처리와 같은 표면 처리 이후 사용하여야 하는데, 탄약 제조 과정에서는 주로 아연계 인산염 피막 처리가 사용되고 있다. 표면 처리 기법 중 하나인 아연계 인산염 피막은 금속 표면을 화학적으로 처리하여 안정성이 높은 화합물 층을 표면에 고착시키는 방법으로, 크게 도장 하지용 경인산염 피막과 부식 방지용 중인산염 피막으로 나뉘어지는데, 아연계 인산염 피막은 전산도, 철 함량과 같은 여러 가지 인자에 의해 피막의 품질과 내식성이 결정된다. 본 연구에서는 전산도 및 철 함량이 탄약 부식 방지 목적으로 사용되는 아연계 중인산염 피막의 중량 및 내식성에 미치는 영향에 대하여 알아보았다. 철 함량에 따라 피막의 구조가 치밀해지며, 내식성이 향상되는 결과를 확인할 수 있었으나, 전산도는 피막의 두께와 중량에만 영향을 주고 내식성에는 큰 영향을 주지 못하였다. 위 결과를 토대로 탄약 제조 과정에서 사용되는 인산염 피막 처리 공정의 최적 제어 수준을 제시하였다.

• 한국초지조사료학회지
• /
• 제15권2호
• /
• pp.93-100
• /
• 1995

This experiment was carried out to investigate how to effect the application of nitrogen, phosphate and potassium on the vegetation and dry matter yield in the mixed sward of orchardgrass and crabgrass (Digitaria sanguinalis [L.] Scop.). The experimental sward wa5 consisted of eight plots of non-application, P, K, PK, N. NK, NP and NPK. These plots were sown with seeds mixture of orchardgrass 17.5 kglha and crabgrass 17.5 kg/ ha on 22 April 1975 in the forage experimental field of Kangwon National University, Chunchon, Korea, and were cut four times from 6 July to 18 November 1975. The results obtained were summarized as follows: 1. In orchardgrass density measured after summering, the plot of nitrogen applied without phosphate marked only 3 1.0% of the plot of nitrogen applied with phosphate while in crabgrass density measured at that time the plot of nitrogen applied without phosphate marked as high as 112.5% of the plot of nitrogen applied with phosphate. 2. Application of phosphate and potassium improved wintering record of orchardgrass. In orchardgrass density measured after wintering, the plot of nitrogen applied without phosphate marked only 9.7% of the plot of nitrogen applied with phosphate, and the plot of NP applied without K marked 63.6% of the plot of NP applied with K. 3. In surface coverage of orchardgrass, in midsummer any plot applied with nitrogen regardless of accompanying with or not with phosphate wa5 0%, but in autumn the plot of nitrogen applied with phosphate was 56-58% and the plot of nitrogen applied without phosphate was 5%. While after wintering the plot of nitrogen applied with phosphate was 28-37% though the plot of nitrogen applied without phosphate was only 0.3-0.6%; the application of phosphate improved summering and wintering record of orchardgrass. 4. Application of phosphate demonstrated remarkable effect on increasing dry matter yield in orchardgrass. In year total yield of orchardgrass, the plot of nitrogen applied without phosphate marked as low as 11.3% of the plot of nitrogen applied with phosphate, but in crabgrass the plot of nitrogen applied without phosphate was almost equal to the plot of nitrogen applied with phosphate showing 97.5% of this plot. 5. Application of potassium was not effective on increasing dry matter yield of orchardgrass but its application was effective on increasing dry matter yield of crabgrass. In dry matter yield of orchardgrass significant difference was not found between NP plot and NPK plot, but in dry matter yield of crabgrass NPK plot recorded significantly higher yield compared with NP plot (p<0.05). 6. In botanical composition of the plot of nitrogen applied with phosphate, crabgrass recorded 46.5-50.5% in early summer (July) but in midsummer (August) it dominated the plot recording 85.6-91.2%. 7. In botanical composition based on the year total yield, in the plot of nitrogen applied with phosphate orchardgrass marked 21.7-26.2% and crabgrass recorded 73.8-78.370, but in the plot of nitrogen applied without phosphate orchardgrass marked only 3.5% being overwhelmingly dominated by crabgrass which recorded 96.5%. 8. Application of nitrogen not accompanied with phosphate strengthened competitive power of the crabgrass unilaterally, making orchardgrass be oppressed fatally by the crabgrass.

• 공업화학
• /
• 제18권3호
• /
• pp.251-254
• /
• 2007

실온에서 베니어에 ammonium chloride, ammonium sulfate, monoammonium phosphate, 그리고 diammonium phosphate와 같은 암모늄염으로 도포하고, 도포된 베니어의 난연성을 조사하였다. 암모늄염으로 도포된 베니어판은 미처리된 순수 베니어판에 비하여 $CO/CO_2$비를 증가시켰다. 이것은 정도에 따라 독성에 영향을 미치는 것으로 생각된다. 암모늄염이 베니어의 난연제로 사용되었을 때, 도포된 암모늄염은 베니어의 난연성을 향상시켰다. 또한 ammonium sulfate와 ammonium chloride로 도포된 베니어는 미처리된 순수 베니어에 비해 양쪽 모두 낮은 총연기방출율과 낮은 총연기량을 나타내었다.

• 한국초지조사료학회지
• /
• 제14권2호
• /
• pp.88-92
• /
• 1994

본 시험은 석회(0, 250, 1,000kg/10a)와 인산(0, 17 및 34kg/10a)t용이 alfalfa의 생장 및 질소고정에 미치는 영향을 구명하기 위하여 전남대학교 농과대학내 온실에서 pot로 수행되었는데 그 결과를 요약하면 다음과 같다. 실험기간동안 alfalfa의 지상부와 지하부의 건물중, 근류중량 및 acetylene환원력은 pH6.2인 토양에서 석회시용 효과가 인정되지 않았지만, 인산시용 효과는 인정되었다(p<0.05). 파종 후 7주에서 alfalfa의 부위별 전질소 함량은 석회시용구가 무시용구보다 증가하였으나 석회시용 수준간에는 차이가 나타나지 않았으며 인산시용 효과도 나타나지 않았다. 파종 후 12주에서 alfalfa의 부위별 전질소 함량은 석회시용구와 무시용구사이에 차이가 나타나지 않았고, 인산시용구는 무시용구보다 낮아지는 경향을 보였다(p<0.05). 이상의 결과를 종합해볼 때, pH6.2인 약산성 토양에서 석회 10a당 250kg시용구아ㅗ 인산 34kg시용구가 alfalfa의 생장 및 질소 고정에 유리하게 작용하였다.

• 한국연초학회지
• /
• 제5권2호
• /
• pp.3-7
• /
• 1983

Three levels of nitrogen, phosphate and potassium were applied to tobacco for the establishment of the optimum rate of the fertilizers for yield and quality. 1 . The rate increment of nitrogen and potassium increased tobacco growth, but phosphate were non - significant between rate. 2. The contents of total-nitrogen and total-alkaloid in the leaf were increased, with the increase of nitrogen rate while the effect of phosphate and potassium were negligible. 3. The yield and quality of the tobacco were increased with the increasing rate of nitrogen and potassium fertilizer but phosphate should little difference.

• 한국동물학회지
• /
• 제34권1호
• /
• pp.123-130
• /
• 1991

Several parameters of u -glycerol-3-pholphate dehydrogenase (GPDH) such as activity, content and translatable mRNA levels were measured to elucidate mechanism underlving developmental and tissue specific regulation of 6PDH activity in Drosophila melonogastrr. In adult segments, most of total GPDH activity (62%1 Iwas detected in thorax where GPDH-1 resided, while 32% of total GPDH aUiviD was only detected in abdomen where GPDH-3 resided. The relative synthesis of GPDH was, however, similar in both tissues, although 58% of total GPDH was synthesized in abdomen. These results strongly suggest that the turnover rate of the abdominal enzyme (GPDH-3) was much more rapid than that of thoracic enzymes (GPDH-1). In nitro translation and immunoblotting experiments also indicate that GPDH-3 was arised by posttranslational modification from a single polypeptide (GPDH-1).