• Title/Summary/Keyword: Mixed potential

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Influences of Addition of Jellyfish Powder to Bed Soil and Bacterial Community Structure of Bed Soil (해파리 분말의 상토 첨가물로서의 효과 및 상토의 미생물 군집 변화에 대한 연구)

  • Beck, Bo-Ram;Choi, Jae-Ho;Kim, Young-Rok;Cha, Ha-Eun;Do, Hyung-Ki;Hwang, Cher-Won
    • Korean Journal of Soil Science and Fertilizer
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    • v.45 no.2
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    • pp.227-234
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    • 2012
  • Recently, the population of toxic and/or unusable jellyfish is increasing during summer along the east coast of Korea, causing massive economical and ecological damage to fisheries, nuclear power plant and marine environment. To solve this problem, this study was carried out using jellyfish as a potential soil additive for horticulture. The jellyfish was solidified and homogenized, then mixed with a commercial bed soil. Allium tuberosum ROTH was planted to control bed soil (BS) and jellyfish powder mixed bed soil groups (Mixed bed soil, MBS), and following parameters were measured during five weeks: water content, electrical conductivity and growth of leaves. At the end of the experiment, bacterial community structures of each pot were analyzed by DGGE. The relative water adsorption of jellyfish powder was about 2.5 times greater compared to its dry weight. The water content of MBS group was significantly higher than BS group 6.5 to 14.2%, and the electric conductivity of MBS group was measured around 2.8 dS/m where BS group was resulted average of 1.8 dS/m. However, the leaves of BS group were grown 30% longer compared to MBS group. DGGE analysis of MBS group was shown in high number of phylum Bacteroidetes and increased diversity of Sphingobacteriia compared to BS group. Jellyfish powder as a soil additive surely will be a good candidate as humectant and microbiota stimulator, although there are several obstacles such as high electrical conductivity and residual alum salt which used for solidification of jellyfish.

Biocontrol of Red Pepper Using Mixed Culture of Antagonistic Bacterium and Phosphate Solubilizing Yeast (항진균 세균과 난용성 인산염 가용화 효모의 혼합 배양액을 이용한 고추 병해의 생물학적 방제)

  • Lee, Gun Woong;Min, Byung-Dae;Park, Sujeong;Jheong, Weonhwa;Go, Eun Byeul;Lee, Kui-Jae;Chae, Jong-Chan
    • Korean Journal of Microbiology
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    • v.49 no.4
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    • pp.398-402
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    • 2013
  • This study was to investigate beneficial effects of microbial mixture on red pepper which was capable of promoting plant growth by solubilizing insoluble phosphate as well as protecting plants from pathogenic attack. Saccharomyces sp. L13 was isolated for phosphate solubilizing activity on aluminium phosphate, tricalcium phosphate, calcium hydrophosphate, and magnesium hydrophosphate. On the other hand, Bacillus sp. L32 was isolated for antagonistic activity against Phytophthora capsisi and Colletotrichum gloeosporioides, causing Phytophthora blight and Anthracnose disease in pepper, respectively. The strain L32 exhibited antagonistic activities both under dual culture assays and detached leaves assays. The each strain under the condition of mixed cultivation exhibited the same growth rates as one under pure cultivation. In greenhouse study, the mixed culture showed the both effect of plant growth promotion and reduction of disease symptom development against P. capsisi and C. gloeosporioides providing a potential as effective microbial agent for plant husbandry.

Analysis of Successional Trend by Transition Matrix Model in the Mixed Broadleaved-Abies Forest of Mt. Odae (추이행렬(推移行列) 모델에 의한 오대산(五臺山) 활엽수(闊葉樹)-젓나무속(屬) 혼효림(混淆林)의 천이(遷移) 경향(傾向) 분석(分析))

  • Kim, Ji Hong
    • Journal of Korean Society of Forest Science
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    • v.81 no.4
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    • pp.325-336
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    • 1992
  • The successional status and potential natural vegetation were examined in a mixed broadleaved-Abies forest located at Mt, Odae National Park. The examination was based on the subsequent process of generation replacement by understory saplings for the dominant canopy trees within 88 $5m{\times}50m$ belt transects. The transition matrix model, which was modified from mathematical theory of Markov chain, was employed to analyze the successional status of the study forest. The model suggests that the study forest is still seral, and it is considered to be more than 700 years away from the steady state or climax in terms of species composition. The simulations predict a remarkable decrease in the proportion of species composition of the present dominant Quercus mongolica and Tilia amurensi.s from current 28% and 13% to less than 3% and 5%, respectively, at the steady state. On the contrary, the proportions of Abies holophylla, Acer pseudo-sieboldianum, Carpinus cordata, and Pinus koraiensis will increase at the steady state. The ratio of mixture between deciduous and coniferous trees will be gradually changed from current 6.5 : 3.5 to 5.0 : 5.0 at equilibrium. Discussion for the problems of Quercus mongolica in successional status noted that the species behaved as a mid-successional dominant, not a climax species in the study forest. The hypothesis and sensitivity of the transition matrix model were also discussed to evaluate the applicability to the real situation. The overall results indicated that the present dynamics of the forest must reflect the seral state due to previous disturbance mainly by hyman related interference.

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Effects of Mixed Extract from Lycium chinense, Cordyceps militaris, and Acanthopanax senticosus on Glucose-Regulating Enzymes of HepG2 in Hyperglycemic Conditions (지골피, 동충하초, 가시오가피 복합추출물이 고포도당 조건에서 배양한 HepG2 세포의 당대사 관련 효소 활성에 미치는 영향)

  • Kim, Dae-Jung;Kim, Jeong-Mi;Kim, Tae-Hyuk;Baek, Jong-Mi;Kim, Hyun-Sook;Choe, Myeon
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.39 no.9
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    • pp.1257-1262
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    • 2010
  • This study investigated the anti-diabetic effects of the mixed water extract (JDG 100) composed of Lycii Cortex, Acanthopanax senticosus and Cordyceps militaris on glucose-regulating key enzymes such as glucokinase (GK), acetyl-CoA carboxylase (ACC). In the current study, HepG2 cells were exposed to pathological condition such as hyperglycemic condition (4.5 g glucose/L) with JDG 100 and then experiments such as RT-PCR and Western blotting were carried out. JDG 100 treated cells increased to $168{\pm}0.04%$ and $182.4{\pm}0.03%$ in GK mRNA and protein expressions, respectively, compared to control. Treatment of the JDG 100 up-regulated ACC mRNA ($127.3{\pm}0.02%$) and protein ($126.7{\pm}0.24%$) of HepG2 cells in the high glucose media. These observations suggest that JDG 100 mixed water extract may have a potential as an anti-diabetic agent in type 2 diabetes mellitus.

Biosynthesis of polyhydroxyalkanoate by mixed microbial cultures from hydrolysate of waste activated sludge (혼합미생물배양체를 이용한 폐활성슬러지 가용화 산물로부터 polyhydroxyalkanoate 생합성)

  • Park, Taejun;Yoo, Young Jae;Jung, Dong Hoon;Lee, Sun Hee;Rhee, Young Ha
    • Korean Journal of Microbiology
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    • v.53 no.3
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    • pp.200-207
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    • 2017
  • A new approach to the solubilization of waste activated sludge (WAS) using alginate-quaternary ammonium complex beads was investigated under controlled mild alkaline conditions. The complex beads were prepared by the reaction of sodium alginate (SA) with 3-(trimethoxysilyl)propyl-octadecyldimethylammonium chloride (TSA) in acid solution, followed by crosslinking with $CaCl_2$. Treatment of WAS with SA-TSA complex beads was effective for enhancing the efficacy of WAS solubilization. The highest value of soluble chemical oxygen demand (SCOD) concentration (3,900 mg/L) was achieved after 10 days of treatment with 30% (v/v) SA-TSA complex beads. The WAS solubilization efficacy of the complex beads was also evaluated by estimating the concentrations of volatile fatty acids (VFAs). The maximum value of VFAs was 2,961 mg/L, and the overall proportions of VFAs were more than 75% of SCOD. The main components of VFAs were acetic, propionic, iso-butyric, and butyric acids. These results suggest that SA-TSA complex beads might be useful for enhancing the solubilization of WAS. The potential use of VFAs as the external carbon substrate for the production of polyhydroxyalkanoate (PHA) by a mixed microbial culture (MMC) was also examined. The enrichment of PHA-accumulating MMC could be achieved by periodic feeding of VFAs generated from WAS in a sequencing batch reactor. The composition of PHA synthesized from VFAs mainly consisted of 3-hydroxybutyrate. The maximum PHA content accounted for 25.9% of dry cell weight. PHA production by this process is considered to be promising since it has a doubly beneficial effect on the environment by reducing the amount of WAS and concomitantly producing an eco-friendly biopolymer.

Calendar for the Prevalence of Honey Bee Diseases, with Studying the Role of Some Materials to Control Nosema (몇 가지 꿀벌 노제마병 방제물질의 평가와 꿀벌 질병의 발생시기 조사)

  • Abou-Shaara, Hossam F.
    • Korean journal of applied entomology
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    • v.57 no.2
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    • pp.87-95
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    • 2018
  • Nosema spp. (NS) causes severe problems to honey bee colonies including the death of the highly infected ones. Searching for effective materials to control this parasite is very important. The objectives of this study were to identify the calendar for the prevalence of NS and other bee diseases, and to test the efficacy of three materials: diluted honey mixed with lemon juice (M1), chamomile extract mixed with sugar syrup (M2) and sutrivet mixed with sugar syrup (M3) against Nosema. To realize these objectives, diseases of brood and adult honey bees were surveyed over one year. Also, the efficacy of M1, M2 and M3 against Nosema was evaluated under field and laboratory conditions. The results showed that few diseases for immature and mature stages of honey bees were recorded. NS was detected during winter and spring in link with low temperature and high relative humidity. Under field conditions, M2 reduced the infection by 36.66% while M3 by 23.33% and finally M1 by 13.33%. In the laboratory, the highest efficacy was to M2 followed by M1 and finally M3. The three materials impacted the percentage of survived bees significantly higher than infected bees without any treatments over the experimental period. The study suggests the potential role of chamomile as a natural material to control NS.

Color, Volatiles and Organoleptic Acceptability of Mixed Powders of Red Ginseng and Cheonggukjang (홍삼과 청국장 혼합 분말의 색도, 휘발성 성분 및 관능적 기호도)

  • Kwon Joong-Ho;Shin Jin-Ki;Moon Kwang-Deog;Chung Hun-Sik;Jeong Yong-Jin;Lee Eun-Joo;Ahn Dong-U.
    • Food Science and Preservation
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    • v.13 no.4
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    • pp.483-489
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    • 2006
  • Considering the development of fusion ingredients rom red ginseng and Cheonggukjang (soybean-fermented food), their commercial powders were evaluated in their Hunter's colors, volatile compounds, and sensory properties depending on manufacturing companies and mixing ratio of both powdered products. Hunters L, a and b values of red ginseng powders were $75.56\sim85.50,\;1.90\sim6.30,\;and\;23.29\sim35.08$, respectively, while those of Cheonggukjang powders were $64.96\sim71.69,\;4.64\sim8.30,\;and\;30.45\sim36.50$, respectively. Volatile compounds were mainly composed of hexanal, $\beta-pinene$, methyl benzene, 3,5-methyl propyl nonane, 2-propanone, decane, and 2,8-dimethyl undecane in red ginseng samples, and of 2,3-butanedione, decane, 2,2,7,7-tetramethyl octane, and 3-methyl butanal in Cheonggukjang samples. Total volatiles of the mixed samples decreased as ginseng decreased and Cheonggukjang increased. The mixed sample of both red ginseng and cheonggukjang in same amounts was the highest in its sensory acceptability, which was composed in the order of 2-propanone, 2-butanone, pentane, hexanal and 3-methyl butanal. The above results indicate that red ginseng and Cheonggukjang showed a potential as fusion ingredient for preparing new functional produce through further processing.

Radiation Protection Effect of Mixed Extracts of Artemisia asiatica Nakai and Moringa oleifera Lam on Rats Uterus (흰쥐의 자궁에 대한 애엽-모링가 혼합추출물의 방사선 방호효과)

  • Lee, Yoon-Ji;Kim, Jang-Oh;Jeon, Chan-hee;Lee, Ji-Eun;Jeong, Geun-Woo;Jung, Do-Young;Min, Byung-In
    • Journal of the Korean Society of Radiology
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    • v.14 no.6
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    • pp.747-753
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    • 2020
  • The purpose of this study was to examine the potential for the development of radioprotective agent in extracts manufactured by mixing Artemisia asiatica Nakai and Moringa oleifera Lam known as antioxidant food with the appropriate ratio. Their whole body were irradiated 7Gy radiation after oral administration of a mixed extract of Artemisia asiatica Nakai and Moringa oleifera Lam to SD Rat for two weeks. And 1 day, 7days, 21days later, changes in blood cell components, SOD activations and tissue changes in the uterus were observed.It was confirmed that the AM + IR group had a higher tendency to recover leukocyte (p<0.05) and platelet (p<0.05) levels than the IR group. It was also confirmed that SOD activity was increased and cell death was decreased in uterine tissue.Based on these results, the mixed extract of A and B is expected to be useful as a radiation protection agent capable of reducing blood cell and uterine damage caused by radiation exposure.

A Study on the Biogasification of Municipal and Industrial Wastewater Sludge (도시 하수 및 공장 폐수 슬러지의 바이오가스화에 관한 연구)

  • Kim, Jahyun;Kim, Seogku;Hwang, Injoo;Ahn, Jaehwan;Kang, Sungwon;Lee, Wontae;Lim, Junhyuk;Lee, Jeakun;Lee, Taeyoon
    • Journal of the Korean GEO-environmental Society
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    • v.15 no.9
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    • pp.5-12
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    • 2014
  • Anaerobic digestion was investigated for the stabilization of sludge, decrease of volatile solids, production of biogas for wastewater sludge. In this study, total solids and volatile solids, elemental analysis were conducted to determine characteristics of various types of sludges and investigate the feasibility of biogas production of Municipal Wastewater Sludge (MWS), Industrial Wastewater Sludge (IWS), mixed sludge (Mix), and Municipal Wastewater Sludg Cake (MWSC). Total solids, volatile solids, and C/N ratio were determined in the range of 11.2~20.6 %, 62.1~83.1 % of TS and 4.96~8.33 %. Using the biochemical methane potential (BMP test), mixed sludge and wastewater sludge finished the methane production within approximately 20 day and 16~17 day. Sludge cake finished within 10 day. Mixed sludge produced 395.5 mL $CH_4$ per g of Volatile Solid (VS) and resulted in the highest methane production. For carbon dioxide production, five sludges had similar value of accumulated carbon dioxide production except for sludge cake.

SRF Conversion Potential of Biomass and Mixed Plastic Waste Generated in D City (D시 내에서 발생하는 바이오매스 및 폐플라스틱 혼합 폐기물의 SRF 전환 포텐셜 분석)

  • Yang, Han-Sol;Kim, Ki-Kwang;Lim, Chae-Wook;Hyun, Jae-Hyuk
    • Journal of the Korea Organic Resources Recycling Association
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    • v.26 no.3
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    • pp.55-61
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    • 2018
  • This study evaluated if the selected samples meets the Solid Refuse Fuel quality criteria in Korea. Biomass and plastic wastes generated in D City were mixed in diverse ratio. When the biomass content was about 40%, the moisture content was close to the SRF criteria and was measured to be 9.8%. The ash contents were analyzed up to 4.19%, and the lower calorific values based on Steuer, Dulong Equation and Bomb Calorimeter were at least 4,851, 4,181 and 3,847 kcal/kg, respectively. As a result of the elemental analysis, sulfur and chloride content were measured up to 0.05%. Those values satisfied the SRF criteria. Also, heavy metals(Hg, Cd, Pb, As) were analyzed to be below the SRF criteria. This makes it possible to use efficiently the wood byproducts abandoned in the woods, and the physical properties of wood being weak to moisture can be supplemented with plastics. Consequently, if plastic and biomass were well mixed and made into SRF, it would overcome the problem of shortening the life span of incineration facilities due to the high temperature of plastic wastes in the incinerator.