About This Journal
About This Journal
Journal of Korea TAPPI (or ‘Palpuchongi Gisul’, abbr. ‘J. of Korea TAPPI, herein ‘KTAPPI’; ISSN: 0253-3200 ) was launched in 1969 to provides advance the scientific knowledge and to share the novel technologies in all related area of pulp, paper and biomass utilization. KTAPPI is published in English and Korean, bimonthly on the last day of even number months (February 28, April 30, June 30, August 31, October 31 and December 31), and indexed in ‘SCPOUS.
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Research Article
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Determinants of Pulp Producer Prices in Korea: Focused on Exchange Rate and Import Prices
국내 펄프 생산자물가 결정요인 분석: 환율과 수입물가를 중심으로
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Seung-Nyeon Kim, Youngwan Goo
김승년, 구영완
- This paper aims to analyze the impact of exchange rate, pulp import prices in US dollar, and interest rate on domestic pulp …
- This paper aims to analyze the impact of exchange rate, pulp import prices in US dollar, and interest rate on domestic pulp producer prices using monthly data from 1992 to 2022. The key findings of this paper can be summarized as follows. In the long-term analysis results, the estimated exchange rate pass-through effect on the pulp industry was found to be 1.02. This suggests that the exchange rate would significantly increase pulp producer prices. Pulp import prices also had a substantial impact on domestic pulp producer prices with an estimated effect of 0.95. This implies that fluctuations in import prices within the pulp industry can strongly influence domestic pulp producer prices. According to the estimation of the error correction model, the short-term impact of exchange rate and pulp import prices on domestic pulp prices were 0.93 and 0.88, respectively. The effects of exchange rate and import price fluctuations were found to be lower in the short run than in the long run. The large impact of exchange rate and import prices on domestic pulp prices indicates greater importance of the foreign sector in pulp industry compared to other industries in Korea. - COLLAPSE
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Determinants of Pulp Producer Prices in Korea: Focused on Exchange Rate and Import Prices
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Research Article
- Interpretation of Carboxymethylation in Cellulose Pretreatment by 1H-NMR Spectroscopy
- Woo-Young Song, Audrey Zahra, Soo-Jeong Shin, Rahmini
- Carboxymethylation reaction in cellulose was investigated with sodium hydroxide concentration, monochloroacetic acid concentration, temperature, and reaction time as main variables. The degree …
- Carboxymethylation reaction in cellulose was investigated with sodium hydroxide concentration, monochloroacetic acid concentration, temperature, and reaction time as main variables. The degree of carboxymethylation in cellulose was analyzed by phenolphthalein titration, IR spectroscopy, and 1H-NMR spectroscopy methods. The NMR spectroscopic method showed more accurate DS (degree of substitution) values than other IR spectroscopy or titration methods. IR method had the advantage of quick measurement but was difficult in baseline correction. The titration method needed longer data acquisition time and higher deviation to less accuracy. Carboxymethylation in cellulose was run in SN2 reaction by sodium hydroxide and monochloroacetic acid concentration with main variables. Substitution position was analyzed by 1H-NMR spectroscopic with acid hydrolysates of carboxymethylated cellulose. Carboxymethylation in lower reaction temperatures led to more C6-hydorxyl substitution reactions in cellulose, but the C6- and C2-hydroxyl group position competed with increasing reaction temperature. - COLLAPSE
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Research Article
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A Study on Production of Soil Covering Materials Using Waste Paper and Citrus Pomace
폐지와 감귤박 기반 토양피복재 제조 연구
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Yu-Jin Lee, Myung Suk Shin, Joung Eun Kim, Soon Hwa Kwon, Yong Joo Sung
이유진, 신명석, 김정은, 권순화, 성용주
- Soil cover materials for the mulching has been used to regulate ground temperature, suppress weed growth, and retain moisture in the soil …
- Soil cover materials for the mulching has been used to regulate ground temperature, suppress weed growth, and retain moisture in the soil due to global warming. Plastic-based mulching materials are mainly used for soil covering, but there are related problems such as lack of water retention and control of the waste covering materials that pollute the soil. In this study, citrus pomace and waste paper were used to produce soil mulching material to contribute to resource recycling and the effects on water retention and compression strength were evaluated for functional evaluation. The addition of waste paper fibers to citrus pomace increased water retention property and compression strength. And the addition of the calcium oxide provided the increase in the strength properties and the control of pH. - COLLAPSE
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A Study on Production of Soil Covering Materials Using Waste Paper and Citrus Pomace
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Research Article
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Manufacturing of Solid Substrates Using Waste Paper Fiber and Biochar
재활용 종이 자원과 바이오차로 제조된 고형배지의 특성
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Hyun-Seo Cho, Yong Joo Sung
조현서, 성용주
- The solid substrate cultivation methods for facility cultivation involve supplying nutrient solutions to the supporting substrate that sustains the plant roots, and …
- The solid substrate cultivation methods for facility cultivation involve supplying nutrient solutions to the supporting substrate that sustains the plant roots, and traditional solid substrates such as coconut coir, rockwool, and perlite are commonly used. However, there have been issues related to environmental problems from disposal and instability in raw material supply. This study evaluated the feasibility of utilizing domestically generated waste paper and biochar as raw materials for the solid substrates. It has been observed that waste paper fibers exhibit a pH level close to neutral, along with suitable electrical conductivity (EC) characteristics and high hydrophilicity, making them applicable as raw material for the solid substrate. Solid substrates manufactured using waste paper fibers show a comparable level of water holding capacity to conventional cocopeat substrates, with slightly lower drainage characteristics. When different biochars were applied in the production of solid substrates, the use of wood biochar was found to increase water holding capacity, while the application of rice husk biochar was confirmed to enhance the drainage properties of ONP solid substrates. The results from this study could provide the foundational data for the development of alternative technologies in solid substrate cultivation for future facility cultivation. - COLLAPSE
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Manufacturing of Solid Substrates Using Waste Paper Fiber and Biochar
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Research Article
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Changes in Properties of Various Deep Eutectic Solvents According to Water Mixing Ratio and Temperature Changes
물의 혼합비율과 온도 변화에 따른 공융용매의 물성 변화
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Cheol Woo Lee, Kwang Seob Lee, Jeong-Yong Ryu, Kyoung-Hwa Choi
이철우, 이광섭, 류정용, 최경화
- The basic properties such as pH, electrical conductivity, and viscosity of four different deep eutectic solvents (DESs) were analyzed in this study. …
- The basic properties such as pH, electrical conductivity, and viscosity of four different deep eutectic solvents (DESs) were analyzed in this study. Additionally, the effects of temperature and mixing ratio of water on the properties of DESs were evaluated. As a result, the pH of DES was found to be affected by the pH of the two eutectic reagents includeed in DES. Organic acid based DES (lactic acid:choline chloride = 5:1) had the lowest viscosity and highest conductivity. While, alkaline inorganic salt based DES (glycerine:potassium carbonate = 5:1) had the highest viscosity and relatively low conductivity. Additionally, as the temperature increased, the conductivity value of DES increased, while the viscosity of DES decreased. The change due to the increase in water mixing ratio was also consistent with the change due to the increase in temperature. - COLLAPSE
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Changes in Properties of Various Deep Eutectic Solvents According to Water Mixing Ratio and Temperature Changes
Journal of Korea TAPPI
