제지슬러지를 이용한 인공상토가 토마토와 오이 플러그묘의 생육에 미치는 영향

정성우,송대빈,허무룡,차선화 경상대학교 농업생명과학연구원 2010 농업생명과학연구 Vol.44 No.6

The present study was performed to identify the possibility of the disused paper-sludge to substitute an substrate for nursery plants. Tosilee substrate as control, paper-sludge and tosilee substrate (1:1, v:v), and paper sludge substate were used in this experiment. After harvesting tomato seedlings, there were no significant differences in growth parameters such as plant height, root length, and fresh and dry weight grown for tosilee substrate, and paper-sludge and tosilee mixture substrate. However, the seedlings grown for paper-sludge substrate alone were extremely depressed. These growth pattern was followed by cucumber seedlings. As the result of this experiment, we suggest that it must need to stabilize the pH and EC, and Zn concentration in paper-sludge for increasing its material for substrate. 본 시험은 폐기되고 있는 제지슬러지의 자원 재활용을 위한 육묘용 상토로서 이용 가능성을 알아보기 위해 수행되었다. 상업 용토 토실이를 대조구로 하여 제지슬러지와 토실이의 혼합 상토 (1:1, v:v), 그리고 제지 슬러지 단용 상토를 처리로 하였다. 토마토의 육묘 결과, 제지슬러지 혼합 상토에서의 생육은 토실이 상토와 비교하여 초장, 근장, 생체중과 건물중 등에서 그 차이 없었다. 반면, 제지슬러지 단용 상토에서의 생육은 현저히 억제되는 것으로 나타났다. 이러한 결과는 오이묘의 생육결과에서도 반영 되어 제지슬러지 단용 상토의 오이묘 생육은 현저히 억제되었다. 본 시험의 결과, 제지슬러지의 자원 재활용을 높이기 위해서는 미 가공 제지슬러지의 높은 pH와 EC의 안정화, 그리고 Zn의 함량을 낮추는 등의 처리가 선행 되어야 할 것으로 판단된다.

재활용 종이 자원과 바이오차로 제조된 고형배지의 특성

조현서,성용주 한국펄프·종이공학회 2024 펄프.종이기술 Vol.56 No.1

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.

Nanoplasmonic Alloy of Au/Ag Nanocomposites on Paper Substrate for Biosensing Applications

Park, Moonseong,Hwang, Charles S. H.,Jeong, Ki-Hun American Chemical Society 2018 ACS APPLIED MATERIALS & INTERFACES Vol.10 No.1

<P>Plasmonic alloy has attracted much interest in tailoring localized surface plasmon resonance (LSPR) for recent biosensing techniques. In particular, paper-based plasmonic substrates allow capillary-driven lateral flow as well as three-dimensional metal nanostructures, and therefore they become actively transferred to LSPR-based biosensing such as surface-enhanced Raman spectroscopy (SERS) or metal-enhanced fluorescence (MEF). However, employing plasmonic alloy nanoislands on heat-sensitive substrate is still challenging, which significantly inhibits broad-range tailoring of the plasmon resonance wavelength (PRW) for superior sensitivity. Here we report paper-based plasmonic substrate with plasmonic alloy of Au/Ag nanocomposites for highly sensitive MEF and SERS biosensing applications. The nanofabrication procedures include concurrent deposition of Au and Ag below 100 °C without any damage on cellulose fibers. The Au/Ag nanocomposites feature nanoplasmonic alloy with single plasmon peak as well as broad-range tunability of PRW by composition control. This paper-based plasmonic alloy substrate enables about twofold enhancement of fluorescence signals and selective MEF after paper chromatography. The experimental results clearly demonstrate extraordinary enhancement in SERS signals for picomolar detection of folic acid as a cancer biomarker. This new method provides huge opportunities for fabricating plasmonic alloy on heat-sensitive substrate and biosensing applications.</P> [FIG OMISSION]</BR>

Sensing properties of separative paper-based extended-gate ion-sensitive field-effect transistor for cost effective pH sensor applications

Cho, Won-Ju,Lim, Cheol-Min Elsevier 2018 Solid-state electronics Vol.140 No.-

<P><B>Abstract</B></P> <P>In this study, we developed a cost-effective ion-sensing field-effect transistor (FET) with an extended gate (EG) fabricated on a separative paper substrate. The pH sensing characteristics of the paper EG was compared with those of other EGs fabricated on silicon, glass, or polyimide substrates. The fabricated paper-based EGFET exhibited excellent sensitivity close to the Nernst response limit as well as to that of the other substrate-based EGFETs. In addition, we found that all EGFETs, regardless of the substrate, have similar non-ideal behavior, i.e., drift phenomenon and hysteresis width. To investigate the degradation and durability of the paper EG after prolonged use, aging-effect tests were carried out in terms of the hysteresis width and sensitivity over a course of 30 days. As a result, the paper EG maintained stable pH sensing characteristics after 30 days. Therefore, we expect that paper EGFETs can provide a cost-effective sensor platform.</P>

제지슬러지를 이용한 인공상토가 토마토와 오이 플러그묘의 생육에 미치는 영향

정성우,차선화,송대빈,허무룡 경상대학교 농업생명과학연구원 2010 농업생명과학연구 Vol.44 No.6

본 시험은 폐기되고 있는 제지슬러지의 자원 재활용을 위한 육묘용 상토로서 이용 가능성을 알아보기 위해 수행되었다. 상업 용토 토실이를 대조구로 하여 제지슬러지와 토실이의 혼합 상토 (1:1, v:v), 그리 고 제지 슬러지 단용 상토를 처리로 하였다. 토마토의 육묘 결과, 제지슬러지 혼합 상토에서의 생육은 토실이 상토와 비교하여 초장, 근장, 생체중과 건물중 등에서 그 차이 없었다. 반면, 제지슬러지 단용 상토에서의 생육은 현저히 억제되는 것으로 나타났다. 이러한 결과는 오이묘의 생육결과에서도 반영 되 어 제지슬러지 단용 상토의 오이묘 생육은 현저히 억제되었다. 본 시험의 결과, 제지슬러지의 자원 재활 용을 높이기 위해서는 미 가공 제지슬러지의 높은 pH와 EC의 안정화, 그리고 Zn의 함량을 낮추는 등의 처리가 선행 되어야 할 것으로 판단된다. The present study was performed to identify the possibility of the disused paper-sludge to substitute an substrate for nursery plants. Tosilee substrate as control, paper-sludge and tosilee substrate (1:1, v:v), and paper sludge substate were used in this experiment. After harvesting tomato seedlings, there were no significant differences in growth parameters such as plant height, root length, and fresh and dry weight grown for tosilee substrate, and paper-sludge and tosilee mixture substrate. However, the seedlings grown for paper-sludge substrate alone were extremely depressed. These growth pattern was followed by cucumber seedlings. As the result of this experiment, we suggest that it must need to stabilize the pH and EC, and Zn concentration in paper-sludge for increasing its material for substrate.

A low-cost, monometallic, surface-enhanced Raman scattering-functionalized paper platform for spot-on bioassays

Kim, Wan-Sun,Shin, Jae-Ho,Park, Hun-Kuk,Choi, Samjin Elsevier 2016 Sensors and actuators. B Chemical Vol.222 No.-

<P><B>Abstract</B></P> <P>We demonstrate the fabrication and spot-on bioassay application of a low-cost, monometallic, surface-enhanced Raman scattering (SERS) paper platform using gold nanoparticle (AuNP)-loaded screen printing inks. The AuNPs were used to enhance the Raman intensity through a surface plasmon resonance (SPR)-driven optical property and sodium carboxymethylcellulose (CMC) was used as a viscous ink to create uniform distribution of the AuNPs on the paper substrate. To minimize the coffee ring effect and uniformly disperse the nanoparticles, the size of citrate-capped AuNPs, the CMC concentration, the volume ratio of CMC solution and AuNPs, and the printing cycles were optimized. Two printing cycles of optimized ink with a 7:1 mixture of 2-wt% CMC and AuNPs produced the strongest SERS effect and an enhancement factor of 1.8×10<SUP>4</SUP> with a SERS paper platform based on a Rhodamine B probe molecule. The platform exhibited high reproducibility, with less than 5% spot-to-spot variation in Raman intensity. Furthermore, the SERS spectra of normal and two virus-infected tear biofluids were comparable to the SERS spectral findings of gold-deposited SERS substrates. The enhanced SERS activity and high reproducibility of a low-cost, flexible, portable, and lightweight paper platform suggest the potential of point-of-care applications of biofluids in fields ranging from clinical analysis to industry.</P> <P><B>Highlights</B></P> <P> <UL> <LI> A simple and facile SERS-functionalized paper platform was designed for POC diagnostics of biofluids. </LI> <LI> The optical property of surface plasmon resonance was implemented using monometallic gold NPs. </LI> <LI> The viscous property of a sodium CMC solution was used to improve the uniformity and reproducibility of SERS. </LI> <LI> The low-cost SERS paper sensor showed an effective signature for classifying adenoviral and herpes simplex conjunctivitis. </LI> </UL> </P>

식물 내건성 평가를 통한 제지 슬러지의 옥상녹화 이용 가능성 연구

최재혁(Jaehyuck Choi),박봉주(Bong-Ju Park) 한국펄프·종이공학회 2016 펄프.종이기술 Vol.48 No.6

The purpose of this study was to find out the possibility of paper mill sludge application for green roof by assessing drought tolerance of Hosta longipes with five different mixing ratio of paper mill sludge and horticultural substrate (9:1, 7:3, 5:5, 3:7 and 1:9). From August 11th to September 29th, number of leaves, plant height, leaf size, chlorophyll content, volumetric water content, evapotranspiration, and relative water content (RWC) were measured. As results, 9:1 was reached 0% of volumetric water content earliest and withered earliest on 35th day of unirrigated experiment, and 7:3 was withered on 42th day. All other mixing ratios were withered on 43th day or later. As for chlorophyll content, all mixing ratios steadily decreased and showed similar patterns. Number of leaves and leaf size were very stable for 21 days and then rapidly decreased. Soil moisture reduction patterns were almost same and evapotranspiration reduction was directly proportional to ratio of horticultural substrate. In conclusion, 50% or less of paper mill sludge application does not significantly affect drought tolerance of H. longipes so that paper mill sludge can be used as substrate for green roof.

Foldable Graphene Electronic Circuits Based on Paper Substrates

Hyun, Woo Jin,Park, O Ok,Chin, Byung Doo WILEY‐VCH Verlag 2013 Advanced Materials Vol.25 No.34

<P><B>Graphene electronic circuits</B> are prepared on paper substrates by using graphene nanoplates and applied to foldable paper‐based electronics. The graphene circuits show a small change in conductance under various folding angles and maintain an electronic path on paper substrates after repetition of folding and unfolding. Foldable paper‐based applications with graphene circuits exhibit excellent folding stability.</P>

Inkjet Catalyst Printing and Electroless Copper Deposition for Low-Cost Patterned Microwave Passive Devices on Paper

Benjamin S. Cook,Yunnan Fang,Sangkil Kim,Taoran Le,W. Brandon Goodwin,Kenneth H. Sandhage,Manos M. Tentzeris 대한금속·재료학회 2013 ELECTRONIC MATERIALS LETTERS Vol.9 No.5

A scalable, low-cost process for fabricating copper-based microwave components on flexible, paper-based substrates is demonstrated. An inkjet printer is used to deposit a catalyst-bearing solution (tailored for such printing) in a desired pattern on commercially-available, recyclable, non-toxic (Teslin®) paper. The catalystbearing paper is then immersed in an aqueous copper-bearing solution to allow for electroless deposition of a compact and conformal layer of copper in the inkjet-derived pattern. Meander monopole antennas comprised of such electroless-deposited copper patterns on paper exhibited comparable performance as for antennas synthesized via inkjet printing of a commercially-available silver nanoparticle ink. However, the solution-based patterning and electroless copper deposition process avoids nozzle-clogging problems and costs associated with noble metal particle-based inks. This process yields compact conductive copper layers without appreciable oxidation and without the need for an elevated temperature, post-deposition thermal treatment commonly required for noble metal particle-based ink processes. This low-cost copper patterning process is readily scalable on virtually any substrate and may be used to generate a variety of copper-based microwave devices on flexible, paper-based substrates.

Compact and Flexible Monopole Antenna for Ultra-Wideband Applications Deploying Fractal Geometry

Geetha G,Sandeep Kumar Palaniswamy,M. Gulam Nabi Alsath,Malathi Kanagasabai,T. Rama Rao 대한전기학회 2018 Journal of Electrical Engineering & Technology Vol.13 No.1

This paper presents a compact ultra-wideband (UWB) flexible monopole antenna design on a paper substrate. The proposed antenna is made of iterations of a circular slot inside an octagonal metallic patch. This fractal-based geometry has been deployed to achieve compactness along with improved bandwidth, measured reflection coefficient -10 ㏈ bandwidth ranging from 2.7 to 15.8 ㎓. The overall size of the antenna is 26 ㎜×19 ㎜×0.5 ㎜, which makes it a compact one. The substrate used is paper and the main features like environment friendly, flexibility, green electronics applications and low cost of fabrication are the key factors for the proposed antenna. The aforementioned UWB prototype is suitable for many wireless communication systems such as WiMAX, WiFi, RFID and WSN applications. Antenna has been tested for the effect of bending by placing it over a curved surface of a very small radius of 10 ㎜.