광재규산질비료 시용이 벼의 규산이용률과 수량에 미치는 영향

양창휴 ( Chang Hyu Yang ),류철현 ( Chul Hyun Yoo ),이상복 ( Sang Bok Lee ),강승원 ( Seung Won Kang ),백승화 ( Seung Hwa Baek ),김성조 ( Seong Jo Kim ) 원광대학교 생명자원과학연구소 2006 생명자원과학연구 Vol.28 No.-

The objective of this study was to investigate the effect of different slag silicate fertilizers on rice by determining the changes in available SiO2, absorbed amount of silicate. Silicate use efficiency, and milled rice yield at Jeonbug series in Honam plain area from 1990 to 2001. The content of 0.5 N-HCI extractable SiO2 in iron refinery slag silicates followed in order of precedence (from lowest to highest); granular quenched slag (GQS), powder quenched slag (PQS), powder air-cooled slag (PAS). And PQS had the most excellent fineness. Absorbed amounts of T-N, K2O in grain and straw of rice increased with the application of silicate fertilizers. By application of silicate fertilizer, the absorbed amount of silicate in rice straw increased by 165, 139, 153 kg ha-1 in GQS, PQS, PAS formulation types as compared with control (704 kg ha-1), respectively. However, the differences of these formulations did not showed the significance as 843~869 kg ha-1. The absorbed amount of silicate in grain also increased by 15~21 kg ha-1 as compared with control (196 kg hi-1), however, it was not differences according to formulation types. Silicate use efficiency was the highest in PQS (42.2%) and the lowest in GQS (27.1%) at the first year, and at the second year, it increased by 44.9 and 35.4% in PAS and GQS but decreased to 24.7% in PQS. In case of PAS which maintained at the first and second years and decreased a little at the third year, it showed small variation than others for the silicate utilization. The number of spikelet per square meter of percent ripened grain increased as the increasing of application level of silicate fertilizer. The thousand grain weight of brown rice increased as the increasing of amounts of silicate fertilizer. Milled rice yield increased by 2% in GQS, 5% in PAS and PQS as compared with the control, respectively.

반응 조건에 따른 규산마그네슘의 입도 변화 및 폴리올 정제 능력평가

유종렬,정홍인,강동균,박성호 한국화학공학회 2020 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.58 No.1

The efficiency of the synthetic magnesium silicate used in basic polyols and edible oil purification is evaluated by its purification ability and filtration rate and is affected by the particle size and surface area of magnesium silicate. In this study, it was investigated the change on the particle size of magnesium silicate was influenced by the reaction temperature, injection rate, injection order (Si, Mg) and Mg/Si reaction mole ratio. The synthesized magnesium silicate was compared and analyzed for the synthesis, grinding, and refining processes. In the synthesis process, the reaction temperature and feed rate did not affect the average particle size change of magnesium silicate, while the reaction molar ratio of Mg / Si and the order of injection acted as main factors for the change of average particle size. The average particle size of magnesium silicate increased by 8.7 μm from 54.4 μm to 63.1 μm at Mg injection when Mg molar ratio increased from 0.125 to 0.500, and increased by about 4.8 μm from 47.3 μm to 52.1 μm at Si injection. The average particle size according to the order of injection was 59.1 μm for Mg injection and 48.4 μm for Si injection and the difference was shown 10.7 μm, therefore the filtration rate was about 2 times faster under the condition of Mg injection. That is, as the particle size increases, the filtration time is shortened and washing filtration rate can be increased to improve the productivity of magnesium silicate. The cake form of separated magnesium silicate after filtration becomes a solid through drying process and is used as powdery adsorbent through the grinding process. As the physical strength of the dried magnesium silicate increased, the average particle size of the powder increased and it was confirmed that this strength was affected by the reaction molar ratio. As the reaction molar ratio of Mg / Si increased, the physical strength of magnesium silicate decreased and the average particle size after grinding decreased by about 40% compared to the average particle size after synthesis. This reduction of strength resulted in an improvement of the refining ability due to the decrease of the average particle size and the increase of the amount of fine particle after the pulverization, but it resulted in the decrease of the purification filtration rate. While the molar ratio of Mg/Si was increased from 0.125 to 0.5 at Mg injection, the refining ability increased about 1.3 times, but the purification filtration rate decreased about 1.5 times. Therefore, in order to improve the productivity of magnesium silicate, the reaction molar ratio of Mg / Si should be increased, but in order to increase the purification filtration rate of the polyol, the reaction molar ratio should be decreased. In the synthesis parameters of magnesium silicate, the order of injection and the reaction molar ratio of Mg / Si are important factors affecting the changes in average particle size after synthesis and the changes of particle size after grinding due to the changes of compressive strength, therefore the synthetic parameter is an important thing that determines productivity and refining capacity. 염기성 폴리올 및 식용유 정제에 사용하는 합성 규산마그네슘의 효율성은 정제능력과 여과속도를 통해 평가되며, 규산마그네슘의 입도 및 표면적에 따라 영향을 받는다. 본 연구에서는 합성변수인 반응온도, 주입속도, 주입순서(Si, Mg), Mg/Si의 반응몰비가 규산마그네슘의 입도에 미치는 영향을 조사하였다. 합성된 규산마그네슘은 합성공정, 분쇄공정, 정제공정으로 비교 분석되었다. 합성공정에서 반응 온도와 주입 속도는 규산마그네슘의 평균입도 변화에 영향을 주지않는 반면, Mg/Si의 반응몰비와 주입 순서는 평균입도 변화에 주된 요인으로 작용하였다. 합성 후 규산마그네슘의 평균입도는 반응몰비가 0.125에서 0.500로 증가할 때 Mg 주입 시 약 54.4 μm에서 63.1 μm로 약 8.7 μm 증가하였고, Si 주입 시 47.3 μm에서 52.1 μm로 약 4.8 μm 증가하였다. 주입 순서 별 평균입도를 비교해보면 Mg 주입 시 59.1 μm, Si 주입 시 48.4 μm로 약 10.7 μm의 평균입도 차이를 보였으며 Mg을 주입하는 조건에서 약 2배 빠른 수세여과속도가 관찰되었다. 즉, 입도가 증가함에 따라 여과 시간이 단축되고 수세여과속도 증가로 생산성 향상에 기여할 수 있었다. 여과 후 분리된 cake형태의 규산마그네슘은 건조과정을 통해 단단한 고형체가 되고 분쇄공정을 통해 분말형태의 흡착제로 사용된다. 건조된 규산마그네슘의 물리적 강도가 감소함에 따라 분말의 평균입도가 감소하고, 이 강도는 반응몰비에 영향을 받는 것을 확인하였다. Mg주입 시 Mg/Si의 반응몰비가 증가함에 따라 규산마그네슘의 물리적 강도가 감소하여 분쇄 후 평균입도가 합성 후 평균입도에 비해 약 40% 감소하는 것을 관찰하였다. 이러한 강도감소는 평균입도감소와 분쇄 후 미분량의 증가로 정제능력의 향상을 가져왔지만 정제여과속도 감소를 가져왔다. Mg 주입 시 반응몰비가 0.125에서 0.5로 증가할 동안 정제능력은 약 1.3 배가 증가하였으나 정제여과속도는 약 1.5 배가 감소하였다. 따라서 규산마그네슘의 생산성 향상을 위해서는 Mg/Si의 반응몰비를 증가시켜야 하지만, 폴리올의 정제여과속도를 증가시키기 위해선 반응몰비를 감소시켜야 한다. 규산마그네슘의 합성변수 중 주입순서와 Mg/Si의 반응몰비는 합성 후 평균입도와 분쇄 후 평균입도 및 미분량 변화에 영향을 주는 주요인자로 생산성 및 정제능력을 결정짓는 중요한 합성변수이다

볍씨 코팅 및 규산복토에 따른 벼 무논점파재배 농가실증시험연구

박광호,김양식,장진택,Park, Kwang Ho,Kim, Yang Sik,Chang, Jin Tack 국립한국농수산대학교 교육개발센터 2015 현장농업연구지 = Journal of practical agricultural resear Vol.17 No.1

The experiment was conducted to evaluate rice growth and yield as affected by different coating and covering materials such as a iron, silicate, iron and silicate mixture of rice seeds in farmer's rice growing field. The tiller number was 36.7 at iron-coated seeds, 32.8 at silicate-covered seeds, 30.3 at iron and silicate mixture coated seeds and 30.2 at untreated control in 44days after seeding. The seedling height was 38.2cm of iron and silicate mixture, 37.7cm of untreated control, 36cm of iron-coated and 35.7cm of silicate covered seeds in 43days after seeding. At 75days after seeding rice tiller number was 153 of iron-coated seeds, 152 of silicate-covered seeds, 147 of untreated seeds and 141 of iron and silicate mixture-coated seeds and also there were different plant height growth of 87.4cm in silicate-covered seeds, 85.7cm in iron and silicate mixture, 85.4cm in untreated control and 83.0cm in iron-coated seeds. The panicle length was of 21.0cm in iron and silicate mixture coated seeds, 20.8cm in silicate covered seeds, 20.7cm in untreated control seeds and 20.6cm in iron-coated seeds. The panicle number was 464 at iron-coated seeds, 404 at untreated control seeds, 427 at silicate-covered seeds and 412 at iron and silicate mixture coated seeds. The spikelet number per m² was of 32,503 in iron-coated seeds, 31,813 in silicate-covered seeds, 29,646 in untreated control, 28,896 in iron and silicate mixture coated seeds. The ripened ratio of rice grain was of 94.5% at iron-coated seeds, 93.9% at iron and silicate mixture coated seeds, 93.6% at silicate covered seeds and 93.2% at untreated control seeds. The rice yield was of 591kg/10a at iron-coated seeds, 580kg/10a at silicate-covered seeds, 571kg/10a at iron and silicate mixture-coated seeds and 539kg/10a at untreated control.

피막 형성제를 이용한 즉각 리프팅 기술 개발

전지현 ( Ji Hyun Jun ),고은아 ( Eun Ah Ko ),한상근 ( Sang Gun Han ),강학희 ( Hakhee Kang ) 대한화장품학회 2018 대한화장품학회지 Vol.44 No.3

즉각 리프팅 화장품은 피부 표면에 주름을 펴주는 다양한 필름 형성제를 함유하고 있다. 그러나 대부분의 필름 형성 고분자는 점착성이 있으며, 피부에 문지르면 밀려 나오는 현상이 있다. 본 연구에서는 신속한 박막 형성 효과가 있는 규산나트륨이 피부 표면에 미치는 영향 및 즉각적인 주름 감소 효과에 초점을 두었다. 물유리 또는 가용성 유리로도 알려진 규산나트륨은 산화나트륨과 실리카를 함유한 화합물이다. 규산나트륨은 물에 쉽게 용해되어 알칼리성 용액을 생성하는 흰색 분말이다. 규산나트륨은 중성 및 알칼리성 용액에서 안정적이며, 규산나트륨 용액은 공기 중에서 건조되어 경화되고 박막을 신속하게 형성한다. 해당 용액을 피부에 도포할 경우, 물증발 및 이온 결합 재형성에 의해 얇은 막이 형성된다. 또한 피부 표면에 강한 실록산(Si-O) 결합을 형성한다. 이러한 고착성을 화장품에 적용하면 탁월한 피부 수축 효과를 나타낼 수 있다. 규산나트륨 용액은 적절한 농도로 배합될 경우, 피부에 필름을 형성하여 리프팅 효과를 제공할 수 있다. 그러나 높은 농도의 규산나트륨이 적용될 경우, 피부 자극을 일으킬 수 있다. 본 연구에서는 끈적임이 없고, 밀림 현상이 없는 피부 탄력 관리 제형을 개발하기 위해 규산나트륨의 농도 및 다른 고정제와의 바람직한 조합을 연구했다. 규산나트륨과 다양한 증점 시스템을 사용하여 즉각적인 리프팅 효과가 있는 젤 제형을 개발했다. 다양한 증점제 중에서 알루미늄 마그네슘 실리케이트는 단시간에 느껴지는 리프팅 효과를 위해 규산나트륨과 가장 우수한 상용성을 지닌다. 즉각적인 물리적 리프팅 젤은 피부 임상 시험을 통해 낮은 자극성을 지니고 있음을 확인했다. Instant face lifting cosmetics contain various film forming agents for stretching the wrinkles on the skin surface. But, most of the film-forming polymers have sticky feels. And they are easily scrubbed out when skin is rubbed on. In this study, we focused on the influence of sodium silicate that has rapid film forming effect on skin surface and immediate wrinkle reducing effect. Sodium silicate, also known as water glass or soluble glass, is a compound containing sodium oxide and silica. Sodium silicate is a white powder that is readily soluble in water, producing an alkaline solution. Sodium silicate is stable in neutral and alkaline solutions. The sodium silicate solution hardens by drying in air and rapidly forms a thin film. When the solution is applied to the skin, the fine membrane coating is formed by water evaporation and ionic bond re-formation. It also makes the strong siloxane (Si-O) bonding on the skin surface. When these fixation properties are applied to cosmetics, they can give remarkable skin tightening effect. The sodium silicate solution can provide the lifting effect by forming a film on skin at a proper concentration. But, skin irritation may be caused with too high concentration of sodium silicate. We studied a desirable range of the sodium silicate concentration and combination with other fixatives for skin care formulation that has no sticky feels and no scrubbing out phenomenon. Immediate lifting gel was developed by using sodium silicate and various thickening systems. Among of the various thickeners, aluminum magnesium silicate showed the best compatibility with sodium silicate for rapid lifting effect. This instant physical lifting gel was confirmed as a low stimulating formula by skin clinical test.

지르코늄 실리케이트를 응집보조제로 이용한 응집공정에 관한 연구

조재성(Jae Seung Cho),윤태일(Tai Il Yoon),전유재(Yu Jae Jeon),조경철(Kyung Chul Cho) 大韓環境工學會 2009 대한환경공학회지 Vol.31 No.3

최근 산업화에 따른 다양한 신종 미량유해물질의 등장과 지속적인 오염물질의 증가로 수질오염의 심각성과 그 위해성에 대한 관심이 커지고 있다. 특히 응집공정을 통하여 유기오염물질 제거를 좀 더 효율적으로 증가시킬 수 있는 방법들이 모색되고 있다. 본 연구는 도시하수 및 호소수를 대상으로 실험하였다. 응집공정에 사용하기 위해 응집 보조제로서 사용될 수 있는 지르코늄 실리케이트(ZrSiO₄)의 특성을 연구 하였다. 응집공정에서의 지르코늄 실리케이트의 주입방법에 따른 유기물 제거율을 PDA (Photometric Dispersion Analyzer)를 통하여 평가하였다. 지르코늄 실리케이트는 pH 7에서 zeta-potential이 -32.22 mv였고 산성에 가까울수록 낮은 음(-)전하 값을 보였으며 지르코늄 실리케이트를 주입하지 않은 도시하수보다 주입하였을 때 UV₂54 값이 더 높은 특성을 나타내었다. 또한 PDA실험을 통하여 확인한 결과 지르코늄 실리케이트의 주입은 floc의 성장을 도와주는 것을 확인할 수 있었다. Alum을 이용한 응집공정에 대한 지르코늄 실리케이트의 주입방법을 선 주입, 동시 주입, 후 주입의 3가지 방법으로 실험을 수행하였다. 실험 결과 Alum과 지르코늄 실리케이트를 함께 주입한 경우 Alum을 단독으로 주입한 경우보다 유기물 제거율이 15% 이상 증가하였다. 특히 Alum 20 mg/L과 지르코늄 실리케이트 10 mg/L를 함께 사용한 경우 90% 이상의 높은 유기물제거율을 보였다. PAC (Poly Aluminium Chloride)와 PACS (Poly Aluminium Chloride Silicate)를 응집제로 이용하는 경우에도 지르코늄 실리케이트를 함께 주입 시 COD(Cr)의 제거효율이 15% 이상 향상되었다. 결과적으로 지르코늄 실리케이트를 응집제와 동시에 주입한 방법이 전, 후로 주입한 경우보다 COD(Cr) 제거효율이 5~10% 높게 나타났으나, 용존성 물질은 동시주입 시, 더 낮은 제거효율을 보였다. The concern of seriousness and harmful effects of environmental pollution is rising by the various water pollutions, appearances of new micro-noxious substances and increase of sustainable pollutants. The method is suggested that can effectively increase the removal of organic substances and several pollutants using a coagulation process. The experiment for characteristics of ZrSiO₄ (zirconium silicate) as a coagulation-aid was carried out for application to coagulation process with domestic wastewater and lake water, and the removal rate of the organic substances depending on a dosage was evaluated by PDA (Photometric Dispersion Analyzer) in this study. Zeta-potential of zirconium silicate solution was -32.22 mv at pH 7 and the lower negative(-) charge was detected in the more acidic conditions. Absorbance on UV₂54 presented higher when zirconium silicate was added than in a domestic wastewater itself. Besides, the results by PDA experiment represented that injection of zirconium silicate could promote growing of floc. Tests for coagulation process were conducted by three ways which are pre-injection, co-injection and post-injection of zirconium silicate with alum. Accordingly, removal efficiency of organic substances increased over 15% in co-injection than in using of alum as a sole reagent. When a 20 mg/L of alum was used with a 10 mg/L of zirconium silicate, the removal efficiency was high up to 90%. Removal efficiency of COD(Cr) was improved more than 15% in case of dosage of coagulant either PAC (Poly aluminium chloride) or PACS (Poly aluminium chloride Silicate) together with zirconium silicate. As a result, the removal efficiency of COD(Cr) were 5~10% higher in a co-injection of zirconium silicate with a coagulant than a pre-injection and a post-injection but it of soluble substances was lower in a co-injection.

규산마그네슘 복합화를 통한 할로이사이트 기반 튜브형 담체의 메틸렌 블루 및 중금속 흡착능 향상 연구

전준영,전종록,신승구,이윤기 대한환경공학회 2023 대한환경공학회지 Vol.45 No.1

Objectives: Thermal stability of the halloysite and magnesium silicate is discussed in terms of microstructure and adsorption behavior to optimize their composite as an absorbent for methylene blue (MB) and heavy metal ions removal from an aqueous solution. Methods: Halloysite/magnesium silicate tubular composites with high adsorption capacity of methylene blue and heavy metal ions were prepared with extrusion and consequent firing. To define the firing temperature of the tubular media, The microstructure and the adsorption equilibrium characterized the thermal stability of the halloysite and the magnesium silicate Results and Discussion: The magnesium silicate used in this study shows broad peaks in x-ray diffraction; however, the treatment of 750℃ induces its crystallization. The specific surface area of the magnesium silicate is also gradually decreased along with the firing temperature increase. No significant degradation in methylene blue adsorption capacity for magnesium silicate is observed until 500℃-treatment. However, the higher firing temperature reduces the capacity: 14.0%P, 26.1%P, and 96.3%P decrease for 600℃, 700℃, and 750℃, respectively. Regardless of heat treatment, the Langmuir isotherm equation represents the adsorption equilibria well compared to the Freundlich model. The tubular media of the halloysite – 30 wt.% of magnesium silicate fired at 600℃ exhibits a high specific surface area of 115 m2 g-1 and a relative porosity of 43.5%. Compared to the halloysite-only tubular media, the adsorption capacity of the composites is significantly improved with the incorporation of magnesium silicate. The adsorption capacity of 168h for methylene blue is more than tripled, 29.8 mg g-1, and the adsorption capacity of Cr(III), Cu(II), and Zn(II) is also greatly enhanced by more than 4.8 times. Conclusions: Thermal stability of magnesium silicate is investigated for use as an additive adsorbent in terms of the microstructure and the adsorption capacity. Even at 600℃ of the firing temperature, magnesium silicate shows a higher specific surface area and higher adsorption capacity of MB compared to those of the halloysite; the adsorption fits well into Langmuir behavior. The addition of magnesium silicate into the halloysite media significantly enhances its adsorption capacity for MB and heavy metal ions such as Cr(III), Cu(II), and Zn(II). 목적: 본 연구는 향상된 메틸렌 블루 및 중금속 이온 제거 흡착능을 지닌 규산마그네슘-할로이사이트 복합 담체 제조를 위해 소재 및 담체의 열적 안정성 및 흡착 거동을 평가하였다. 규산마그네슘-할로이사이트 복합 담체를 제조하여 수용액으로부터 메틸렌 블루 및 중금속 이온 제거를 위한 흡착제로 활용하기 위해 소재의 열적 안정성 및 흡착능을 평가하였다. 방법: 메틸렌블루 및 중금속에 대해 높은 흡착능을 지닌 할로이사이트/규산마그네슘 관형 복합 담체가 압출 및 소성 공정을 통해 제조되었다. 미세구조 및 흡착 평형 분석을 통해 할로이사이트 및 규산마그네슘의 열적 안정성을 평가하였으며, 결과를 통해 관형 담체의 소성 온도를 결정하였다. 결과 및 토의: 규산마그네슘은 750℃ 소성 시 결정화가 진행되었으며, 비표면적은 소성 온도가 증가함에 따라 저감되었다. 저감된 규산마그네슘의 흡착능은 500℃ 소성까지는 유의미한 변화가 없었으나, 600℃, 700℃ 및 750℃ 열처리 시 각각 14.0%P, 26.1%P, 및 96.3%P 감소되었다. 열처리와 무관하게, 할로이사이트 및 규산마그네슘의 등온 흡착 데이터는 Langmuir 등온흡착식에 가장 잘 맞았다. 600℃소성된 할로이사이트-30 wt.% 규산마그네슘 복합 관형 담체는 115 m2 g-1 의 높은 비표면적 및 43.5%의 기공율을 나타내었으며, 168시간 메틸렌블루 흡착능이 29.8 mg g-1 을 나타내었다. 이는 할로이사이트 관형 담체 대비 3배 이상 증가한 값이며, Cr(III), Cu(II), 및 Zn(II)의 흡착능도 모두 4.8배 이상 향상되었다. 결론: 미세구조 및 흡착능의 관점에서 흡착제로서의 규산마그네슘의 열적 안정성이 평가되었다. 600℃열처리 후에도 규산마그네슘은 할로이사이트 대비 높은 비표면적 및 흡착능을 보여주었으며, 흡착은 Langmuir 거동을 보였다. 할로이사이트 담체의 규산마그네슘 복합화를 통해 메틸렌 블루 및 Cr(III), Cu(II), and Zn(II)흡착능이 대폭 향상되었다.

볍씨의 규산코팅방법에 따른 이용특성과 육묘효과

강양순,김완중,황덕상,김희규 한국작물학회 2020 한국작물학회지 Vol.65 No.1

A new silicate coating technology was developed which reduces the impact of dust and loosening during seeding compared to existing silicate-coatings (Seed/Si/Zeolite), and therefore can lower the production costs of rice cultivation. In this method, 100 g of rice seed is coated with 18 mL of liquid silicic acid and then dressed with a mixture containing 80 g of dolomite and 5 g of iron. To determine the most effective method of application and ensure that seedlings developed healthily, a series of experiments were carried out. Infected seeds scattered in seedling boxes and pots (soil and hydroponic) were coated dry, without disinfection. In comparison to the seed which were not treated with the silicate-coating, the new seed (A) were 1.84 times heavier in weight, and were also improved in terms of coating strength and coating color. Compared to the seedlings grown from the non-coated seed, those grown from the new silicate-coated seed were of significantly higher quality (weight/length) and had erect, dark greenish leaves, which are ideal plant characteristics. This was most likely due to increased silicate uptake. The symptoms of bakanae disease in the non-coated seed peaked after 38 days to 54.2%, whereas the control value was 68.8% in the new silicate-coated seed (A). In the infected seedlings grown from the new silicate-coated rice seed, subnormal macro-conidia, namely, a sickle shape spore without a septum; a straight oblong shape spore without a septum and with a thick cell wall; and inter-septal necrosis of a normal spore were detected. It is believed that the strong alkalinity of silicic acid have acted as unfavorable conditions for pathogenicity. In seedlings grown from the new silicate coated rice seed under hydroponic conditions without nutrients, normal root activity and growth was maintained without leaf senescence. Therefore, it was possible to reduce the rate of fertilization. In the future, a new silicate-coated rice seed was required for the study of minimal nutrition for anti-aging of seedlings. 벼 직파재배나 육묘에서 종자소독, 병충해방제, 시비 등에 요구되는 생산비절감기술로 개발된 기존 규산코팅볍씨(규산/Zeolite)의 단점 보완으로 신규 규산코팅기술이 개발되었다. 신규 규산코팅볍씨의 제조 및 이용특성과 육묘상자에서 건묘육성 및 벼 키다리병 경감효과를 명확하게 하기 위하여 벼 키다리병 이병성 감염종자를 소독 없이 마른상태로 코팅한 볍씨와 중도저항성 소독된 보급종자를 마른 상태로 코팅한 볍씨를 토경조건과 수경조건에서 시험이 수행되었다. 1. 신규 규산코팅볍씨는 종자 100 g에 코팅 바인더 점액성수용성규산 18 ml을 충분히 묻히고 거기에 Dolomite 80 g/철 5 g의 혼합분말을 고루 뿌려서 코팅되었다. 2. 신규 규산코팅볍씨의 특성은 종자무게의 1.84배이었고 중량, 코팅강도와 코팅색택 등이 기존 규산코팅볍씨보다 훨씬 개선되었다. 3. 신규 규산코팅볍씨의 묘는 무코팅볍씨에서 자란 묘의 연한 엽색과 늘어지는 초형에 비하여 짙은 엽색(SPAD치) 으로 직립되었고 엽신의 규질화가 현저히 높았으며 묘소질(w/cm)은 유의하게 증가되었다. 특히 생육량과 엽색도는 토경조건에서 보다 영양이 결제된 수경조건에서 뚜렷하였다. 4. 47일간 육묘 중 벼 키다리병 발생은 파종 후 38일에 peak 를 보였고 무코팅볍씨 발병률 54.2%에 비하여 신규 규산코팅에서는 68.8~70.7%의 방제가를 나타내었다. 이상을 종합하여 보면 벼농사에서 가장 많이 요구되는 규산질 비료를 Dolomite와 철분으로 종피에 코팅시켜서 만든 신규 규산코팅볍씨로 종자소독, 건묘육성 및 벼 키다리병 경감 효과 등은 친환경 저비용과 안전 쌀 생산에크게 기여되리라 본다. 또한 장기 영양결제에도 육묘 중뿌리 활력이나 엽의 노화 없이 정상생육이 지속되어 육묘시비량 절감 가능성도 보였고 금후 묘의 노화경감을위한 최소 영양공급 연구가 요구되었다

Synergistic effect of potassium metal siliconate on silicate conversion coating for corrosion protection of galvanized steel

Jaekyu Min,Ji Hoon Park,Hong-Kyun Sohn,Jong Myung Park 한국공업화학회 2012 Journal of Industrial and Engineering Chemistry Vol.18 No.2

Silicate conversion coating is considered as an alternative to hexavalent chromium conversion coating for corrosion protection of galvanized steels. However, the coating must be treated with hot air afterward in order to obtain a water resistant silicate layer and to increase corrosion resistance of the coating. Moreover, it is difficult to apply the uniform thermal treatments on the large irregular shaped metal parts. Furthermore, the heat treatment is an energy consuming process. In this work, the effects of adding potassium methyl siliconate (PMS) into the silicate conversion coating on the anti-corrosion properties were studied. The silicate coating layers were formed by the simple immersion into the silicate solutions and the subsequent ambient drying at room temperature. It was verified that the addition of PMS increased the temporary corrosion protection ability without the post-thermal treatments. Coating thickness was around 100 nm and K ion was distributed preferentially at zinc-silicate interface. It was proved that the more hydrophobic surface was formed mainly due to the substantial decrease of the concentration of K ion at the coating surface by the addition of PMS. It was a methyl group of PMS that changed the hydrophilic silicate layers into hydrophobic ones. Subsequently, the enhanced water barrier property of the hydrophobic silicate layers increased the corrosion resistance of the silicate-coated galvanized steel.

Immunomodulatory activity of sodium silicate containing selenium in LPS-stimulated immune cells

( Ja Seon Yoon ),( Joon Yeop Lee ),( Nak Young Baek ),( Bong Su Kang ),( Ji Yong Yun ),( Dang Yong Kim ),( Ja Kyoung Seol ),( Young Won Yun ),( Sang Yoon Nam ),( Jae Hwang Jeong ),( Jong Soo Kim ),( B 한국예방수의학회(구 한국수의공중보건학회) 2013 예방수의학회지 Vol.37 No.1

Selenium salts are toxic in large amounts, however, trace amounts are necessary for cellular function in many organisms, including all animals. Selenium is a component of the antioxidant enzymes glutathione peroxidase and thioredoxin reductase (which indirectly reduce certain oxidized molecules in animals and some plants), sodium silicate (Na2SiO3) possesses a number of biological activities, especially in improvement of cell growth. However, few studies on the effects of sodium silicate and selenium on an immune system have been reported so far. The objective of this experiment was to investigate the effect of soluble sodium silicate/Se on lipopolysaccharide (LPS)-induced inflammatory response in RAW264.7 cells. The production of nitric oxide (NO) and proinflammatory cytokines was examined in lipopolysaccharide (LPS)-stimulated RAW264.7 cells. The cells were cultured in Dulbecco`s modified Eagle`s medium (DMEM). Concentration of 10 ppm or less of soluble sodium silicate/Se had no cytotoxic effect on RAW264.7 cells. The soluble sodium silicate/Se decreased LPS-induced production of NO but did not affect the levels of TNF-α, IL-2, and IFN-γ in RAW264.7 cells In addition, the sodium silicate/Se induced up regulation of IL-1β level in a does-dependent manner. These results suggest that the soluble sodium silicate/Se has a synergistic effect in down-regulation of inflammatory response in vitro.

벼 종자의 코팅소재별 발아 및 유묘생육 특성

박광호,강윤규,오대근,김양식,장진택,Park, K.H.,Kang, Y.K.,Oh, D.G.,Kim, Y.S.,Chang, J.T. 국립한국농수산대학교 교육개발센터 2011 현장농업연구지 = Journal of practical agricultural resear Vol.13 No.1

The study was performed to evaluate rice seed germination, seedling emergence and seedling establishment under different coating materials such as iron powder, silicate powder and silicate coverage after direct seeding. There were differences among coating materials as follows; 1. In seedling establishment there was the highest in untreated control> silicate-coated seeds and silicate coverage>iron-coated seeds. In case of untreated control this result due to laboratory experiment unlike field conditions where has been constraints in bird damages, seed dry under strong sunlight and buoyance after rainy and/or irrigation. 2. Thus, there was the highest in untreated control>silicate-coated seeds>silicate coverage>iron-coated seeds, respectively. 3. Total fresh weight(shoots and roots) of the seedling was also highest in untreated control>silicate-coated seeds and silicate coverage> iron-coated seeds.