살충제 저항성 목화진딧물 집단(완주, 춘천, 고성)에 대한 3종(afidopyropen, chlorfenapyr, cyantraniliprole) 약제별 감수성과 혼용에 따른 방제 효과를 평가하였다. 3개 야외집단에 대해서 3약제 모두100배 이상의 저항성비를 보였다. 혼합제의 협력작용을 평가하기 위해 반수치사농도(LC50) 을 이용한 조합지수(CI), %M(synergism), 연합독성계수(CTC), 와들리 비율(WR), 상승비율(SR)와 사충률을 이용한 아보트 비율(AR)로 비교하였 다. Afidopyropen + chlorfenapyr은 모든 야외집단에 대해서 살충활성의 증가를 보였고, chlorfenapyr + cyantraniliprole, afidopyropen + cayntraniliprole은 완주, 춘천 집단에 대해서 살충활성의 증가를 보였다. 그러나 chlorfenapyr + cyantraniliprole (CI, 1.63; %M(synergism), 30; CTC, 64.0; WR, 0.6, AR, 0.54)과 afidopyropen + cyantraniliprole (CI, 6.7; %M(synergism), 1; CTC, 19.8; WR, 0.2, AR ≤ 0.55)은 고성 집단에 서 길항작용을 나타내었다. 포장조건에서도 afidopyropen + chlorfenapyr, chlorfenapyr + cyantraniliprole, afidopyropen + cyantraniliprole 은 99% 이상의 높은 방제가를 보여 향후 살충제 저항성 목화진딧물 방제용 혼합제 개발에 유용하게 활용될 것이다.

Carbon-based materials, particularly graphite, have been extensively studied for their potential in fabricating flexible conductive fabrics with high electrical conductivity, which are attractive for wearable electronics. In this study, we investigated the effects of polar solvents, graphite concentration, and temperature on the electrical properties of conductive cotton fabrics. Our results show that the type of polar solvent and graphite concentration strongly influence the electrical conductivity of the fabrics. By controlling the graphite concentration, a wide range of conductive cotton fabrics with different conductivity values can be produced. Additionally, temperature resistance studies revealed that the fabrics exhibit both semiconductor and metallic behavior in the temperature range from room temperature to 160 °C. These interesting properties make the conductive cotton fabrics suitable for use as electrical components in circuits with resistive and inductive loads. Furthermore, we fabricated a supercapacitor with electrodes based on dispersed graphite and an electrolyte of sodium chloride salt dissolved in deionized water. Our findings suggest that conductive cotton fabrics have great potential for use in high-performance wearable electronics and energy storage devices.

The cotton aphid, Aphis gossypii glover (Hemiptera: Aphididae), is the world-wide agriculture pest and has the ability to become resistant to many pesticides. Hence, we conducted behavioral tests on apterous and alate aphids for series compounds from natural products by using a two-choice test, a no-choice test, a host choice test and electroantennography (EAG). As a result, we found 3 out of 30 compounds for apterous aphids and 2 out of 15 compounds for alate aphids, both of which showed powerful repellent effects on these aphids. In this study, we suggest that our findings could be useful and eco-friendly spatial repellents for controlling cotton aphid.

This study was conducted to investigate the optimum supplementation ratio when replacing cotton seed meal with rapeseed meal for cultivating oyster mushrooms. The chemical properties among the treatments were pH 4.5~4.7, total carbon content was 46.3~46.5%, total nitrogen content was 1.6~1.7%, and carbon-nitrogen ratio was 27.0~27.8. These did not differ significantly from the control. Mycelial growth was 85.1 mm (Heuktari), and 72.8 mm (Suhan-1Ho) in medium containing 5% rapeseed meal, with no significant difference in mycelial density between cultivars. Fruiting body characteristics are as follows: In 'Heuktari', the color of the pileus was darker than control with an L value of 32.5, and pileus thickness and diameter were 3.2 mm and 27.6 mm, respectively. Stipe length and diameter were 86.0 mm and 9.1 mm, respectively. Valid stipe number per bottle (1,100 cc) was 25.9, and a yield of 189.7 g/1,100 cc was recorded in mixed medium containing 5% rapeseed meal (higher than control). In mixed medium containing 10% rapeseed meal, the yield was 184.5 g/1,100 cc (comparable to control). In 'Suhan-1Ho', supplemented with 5% rapeseed meal, pileus color was darker than control color, with an L value of 28.8. Pileus thickness was 4.5 mm. Stipe diameter was 12.3 mm (higher than control), and yield was 145.5 g/1,100 cc (comparable to control).

This study investigates the preparation of activated carbon fiber derived from waste cotton fabric for economical and ecofriendly recycling as well as its application to water purification. The activated carbon fiber was prepared by physical activation using steam and the adsorption property was then evaluated using methylene blue. When the activation temperature increased, the specific surface area and mesopore volume of the activated carbon fiber increased up to 2562 m2/ g and 0.214 cm3/ g, resulting in the increased adsorption of methylene blue. The results of the adsorption experiment for the activated carbon fiber were analyzed using the Langmuir and Freundlich equations. The Langmuir equation was more suitable than the Freundlich equation to explain the adsorption equilibrium. The maximum adsorption amount of methylene blue was 161.1–731.5 mg/g for fiber samples activated at temperatures ranging from 750 to 950 °C with sample labeled 750SA to 900SA according to the Langmuir equation. The kinetics of methylene blue adsorption by the activated carbon fiber were analyzed using non-linear pseudo-first-order and pseudo-second-order. Sample 750SA was suitable for the pseudo-first-order and 800SA, 850SA, and 900SA sample were suitable for the pseudo-second-order. Therefore, waste cotton fabric has the potential to be the precursor for activated carbon fiber with excellent adsorption properties.

본 연구의 목적은 생활환경교육 프로그램이 여성의 면 생리대 사용에 미치는 영향을 알 아보는 데 있다. 이 연구에는 A시 관내 성인 여성 50명이 참여했다. 연구 결과는 다음과 같다. 첫째, 생활환경교육이 면 생리대 사용에 영향을 미치는 것으로 통계적으로 유의미한 것으로 나타났다. 둘째, 생리 시 느끼는 불편감은 면 생리대 사용에는 영향을 미치지 않는 것으로 조사되었다. 셋째, 일회용 생리대의 위해성에 대해 조사한 결과 45명(90%)은 들어 봤고, 정보 출처는 언론이 32명(64%), 교육 11명(22%)이라고 답했다. 넷째, 면 생리대 사용 을 망설이는 이유는 세탁 등 뒤처리가 어려워가 37명(74%), 생리혈이 샐까 봐 불안해서가 7명(14%)으로 조사되었다. 다섯째, 미혼보다는 기혼의 면 생리대 사용률이 높은 것으로 나 타났다. 면 생리대 사용률을 높이기 위해서는 생활환경교육 프로그램을 확대하는 것이 필 요하다. 본 연구가 여성의 건강과 지구의 건강을 지키는 데 활용되기를 바란다.

Activated carbon (AC) injection has been regarded as one of the most effective control technologies for Hg0 removal in flue gas. It is worthwhile to explore new and simple preparation methods for AC with low cost and high Hg removal capacity. In this study, a biomass based AC was successfully prepared from levant cotton exocarp using ZnCl2 activation. The mercury adsorption efficiency and mechanism were studied via the fixed bed experiments. Activator, reaction temperature and components of simulated coal-fired flue gas were investigated. Brunauer–Emmett–Teller (BET), scanning electron microscopy with energy-dispersive X-ray spectrometry (SEM–EDX) and X-ray photoelectron spectroscopy (XPS) were applied for morphology characterization of the prepared AC and discussion of the possible adsorption mechanism. The adsorbed mercury species and the physiochemical properties of prepared AC were discussed. The results showed that (1) Hg0 removal efficiency could reach up to 90% at 150 ℃ under simulated flue gas (SFG); (2) Hg0 adsorption was controlled by the combination of physical and chemical mechanisms.

면화는 중요한 섬유 작물로 종자는 가축의 사료로 사용 된다. 작물 생명공학은 농업 분야에서 농업적 형질과 질을 향상시키기 위해 활용되어져 왔다. 국내 식품, 사료, 가 공 제품에 유전자변형 (LM) 면화의 사용이 증가함에 따라 환경으로의 LM 면화의 비의도적 유출 또한 증가하고 있다. LMO 모니터링 사업에서 수집된 LM 면화를 검정하기 위하여 국내 수입 승인된 LM 면화의 검출법 개발이 필요하다. 본 연구에서는 LM 면화 MON757, MON88792, COT67B, GHB811 4종을 대상으로 동시검출법을 개발하였다. 이벤트에 대한 유전 정보는 유럽 JRC와 농림축산검역본부에서 확보하였다. LM 면화의 동시검출법 개발을 위해 이벤트 특 이적인 프라이머를 설계하였으며 특이적인 증폭을 확인하였다. 특이도 검정, 무작위 표준물질 혼합물 분석, 검출한계 분석을 통하여 동시검출법의 정확도와 특이도를 검증하였다. 그 결과 본 동시검출법은 각각의 이벤트를 검출할 수 있으며 LM 표준물질을 활용하여 특이도를 검정하였다. 또한 무작위 표준물질 조합도 정확하게 검출할 수 있다. 검출한 계 분석에서는 25 ng의 미량의 주형 DNA로 단회 분석으로 검출이 가능하다. 결론적으로 4종의 LM 면화 동시검출법을 개발하였으며 LM 면화 자생체 분석에 활용될 것으로 사료 된다.

Hierarchically porous carbon materials with high nitrogen functionalities are extensively studied as highperformance supercapacitor electrode materials. In this study, nitrogen-doped porous carbon textile (N-PCT) with hierarchical pore structures is prepared as an electrode material for supercapacitors from a waste cotton T-shirt (WCT). Porous carbon textile (PCT) is first prepared from WCT by two-step heat treatment of stabilization and carbonization. The PCT is then nitrogendoped with urea at various concentrations. The obtained N-PCT is found to have multi-modal pore structures with a high specific surface area of 1,299 m2 g−1 and large total pore volume of 1.01 cm3 g−1. The N-PCT-based electrode shows excellent electrochemical performance in a 3-electrode system, such as a specific capacitance of 235 F g−1 at 1 A g−1, excellent cycling stability of 100 % at 5 A g−1 after 1,000 cycles, and a power density of 2,500 W kg−1 at an energy density of 3.593 Wh kg−1. Thus, the prepared N-PCT can be used as an electrode material for supercapacitors.

The following results were obtained after developing and conducting tests on items set up for evaluation of the cotton machine system development by self-test and requesting an external authorized testing agency to conduct the test. In technology development, the re-materialization of cotton fragments reduced manufacturing costs by 40%, and the recovery rate was over 95% as a result of the cotton loss test for the development of cotton machine systems. The Feed Roller Speed Control performance test resulted in a revolution of 5 rev per minute.

Naturally occurring plant toxins, such as benzoates, have been shown to have insecticidal effects on some pest insects. In this study three commercially available benzoates, methyl benzoate (MB), ethyl benzoate (EB), and vinyl benzoate (VB), were assessed for their contact toxicity against Aphis gossypii Glover and its lacewing predator Chrysoperla carnea Stephens. Toxicity of 1% MB, EB, and VB showed 100%, 85% and 60% mortality of A. gossypii at 24 h. In addition, a mixture of MB and EB showed higher synergistic effect than mixtures of MB+VB or EB+VB against A. gossypii. Toxicity at 1% concentration of three benzoates against A. gossypii showed lower toxicity against the larvae of C. carnea after 72 h of exposure than A. gossypii. Our result suggest that benzoates have high potential as environmentally safe biopesticides for A. gossypii control.

In order to measure the filtration characteristics of a cotton ball shape filter, the experiments of suspended solids(SS) surrogate material selection and filtration performance have been carried out in this study. Between the two materials of powdered activated carbon(PAC) and powdered red-clay, PAC is more suitable surrogate material in terms of experimental criteria and particle size distribution in the non-point source pollutants removal system. As a result of the filtration experiments with the cotton ball shape filter, the initial headloss was about 8 cm, and the headloss slightly increased over filtration time. The Kozeny-Carman equation was used to analyze the changes of pressure and porosity during the filtration. The initial porosity was calculated as 0.945 and it decreased to 0.936 at the end of design filtration time. As the filtration continued, the SS concentration of the filtered water gradually increased and the SS removal rate gradually decreased. When the SS target removal efficiency is assumed to be 80%, the cumulative SS removal capacity is expected as 28.8 kg/m2. This means the volume loading rate of the cotton ball shape filter can be 115 m3/m2 when the typical SS concentration of non-point source water pollution is assumed as 250 mg/L.

Cymbidium flower is mainly grown for exportation to China and Japan, but detection of a few pests including the cotton aphid, Aphis gossypii (Hemiptera: Aphidae), necessitated post-harvest treatment for casual exportation. Thus, we irradiated electron beam to cotton aphids occurring in cymbidium to establish post-harvest method for casual exportation of the flowers. For cymbidium, six categories of product quality were examined after eight different doses were irradiated (100, 200, 300, 400, 500, 600, 800 and 1,000 Gy). One thousand Gy to cymbidium caused an extreme deterioration only in vase life in both colors compared to control (0 Gy). In the case of cotton aphids, adult longevity decreased from 11.23 (100 Gy) to 4.70 (400 Gy) when four different doses were irradiated (100, 200, 300, and 400 Gy), with control being an average of 20.89 days. The numbers of total first instar nymph produced per adult was not significantly differed among five doses (2.21 ~ 2.74 individuals), but was substantially lower compared to control (an average of 51.46; P < 0.0001). Live F1 nymphs did not develope to adults at all five doses, except for a single nymph at 100 Gy, which was dead right after emergence. The results of probit analysis indicated that majority of adults required 3.33 ~ 7.55 days for 90% mortality at 200 Gy and higher, but at 100 Gy it required 41.56 days. Therefore, higher than 100 Gy might be required for complete control of adult cotton aphids and their F1.