• Title/Summary/Keyword: organic control

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Biological Activity of Sorghum bicolor M. cv. Bulgeunjangmoksusu Extracts (붉은장목수수 추출물의 생리활성)

  • Kim, Joo-Seok;Lee, Yea-Ji;Yang, Jinfeng;Sa, Yeo-Jin;Kim, Myeong-Ok;Park, Jong-Hyuk;Park, Dong-Sik;Yu, Chang-Yeon;Kim, Myong-Jo
    • Korean Journal of Plant Resources
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    • v.26 no.1
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    • pp.111-118
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    • 2013
  • The objective of this study was to determine the biological activities of Sorglum bicolor extracts. Organic fractions, including n-Hexane, EtOAc, and n-BuOH fractions were obtained from the methanol extract of Sorglum bicolor M.. In DPPH radical scavenging activity, SC50 values of methanol extract and EtOAc fraction were exhibited 0.66±0.26μg/mL and 1.03±0.02μg/mL, respectively. Contents of total polyphenol and flavonoids in EtOAc fraction, which were much higher than those of other fractions, were 58.12 mg/g and 4.79 mg/g respectively. Also, effects of reducing power was strongly showed in EtOAc fraction. α-Glucosidase and α-amlyase inhibition activities were showed the higher effect in D.W. fraction (2.83μg/mL, 36.64μg/mL). In MTT assay in the AGS, HT29 and HCT116 cell lines were significantly higher in the n-BuOH fraction than in the other fractions at 50μg/mL concentration of extracts.

PSYCHOPATHOLOGY IN ADOLESCENTS WITH PARENT ABUSE (부모학대 청소년의 정신병리)

  • Kwak, Young-Sook;Bang, Hyun-Soog
    • Journal of the Korean Academy of Child and Adolescent Psychiatry
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    • v.9 no.1
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    • pp.13-25
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    • 1998
  • Aim:We think that the most important etiology in parent abuse is the psychodynamic and psychopathology in the family. So, we investigated the adolescents being admitted in SNMH, whose chief complaints were parent abuse. We were trying to explore families psychodynamic and psychopathology, especially mother-child interaction and to differentiate them in according to developmental psychopathology. Method:Our objects were the adolescent patients admitted in SNMH from 1987 to 1997 because they attacked parents verbally and physically. We examined 21 adolescents except those with psychosis, organic mental disorder, autism and mental retardation by means of interview or chart review. Result and Conclusion:The number of male patients was 14 and the number of female patients was 7. The most common diagnosis was conduct disorder and borderline personality disorder. The mean age was in the mid-teens. We observed 4 subgroups that were divided developmentally in object relation. 1) Symbiotic group with mother:(1) They did not separate and remain in symbiotic relationships with their mothers based on insecure attachment. Fathers were abscent emotionally and physically, and their mothers were prominent in close relationships with the patients in their family , where as the patients were the only man in the family. Adolescents entered the second separation-individuation. They expressed anger and internal tension involved with the close attachment with their mothers and also attempted separation from their mothers through physically attacking them. (2) These patients had suffered from physical illness and developmental delay since birth. Therefore the parents overprotected their children. The children had persistent infantile omnipotence and fantasies of power, so they could not deal with unrealistic states, adapt to reality, and depended on their parents overtly. They easily acted out unless their demands were fulfilled. 2) Borderline personality disorder:We observed deficiencies in care taking. Their parents had personality problems and immaturity. They coulden’t help their children to be separated in the rapproachment phase. Their conflict about dependence-independence was revived in the second separation-individuation adolescent period. We understand parent abuse as an attempt to overcome the conflict. 3) Conduct disorder:They did not build up basic attachment with their parents. They think of their parents as only a means of fulfilling their needs. When patients’ need were not fulfilled and remained in a conflicted state, they attacked their parents, unable to control their aggressions and impulses.

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Quality Characteristics and Anti-Diabetic Effect of Yacon Vinegar (야콘 식초의 품질특성 및 항당뇨 효과)

  • Lee, Mi-Kyung;Choi, Sa-Ra;Lee, Jin;Choi, Yun-Hong;Lee, Ju-Hye;Park, Kyung-Uk;Kwon, Seung-Hyek;Seo, Kwon-Il
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.41 no.1
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    • pp.79-86
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    • 2012
  • This study was performed to investigate the physiochemical properties and anti-diabetic effect of yacon vinegar by two-step fermentation. Yacon was matured at room temperature for 20 days. The sugar content of yacon juice prepared from mature yacon was approximately 14Brix. In the first stage, yacon wine was produced from the juice at 28C for 6 days. In the second stage, acetic acid fermentation was conducted at 30C and 200 rpm for 6 days to produce yacon vinegar with 4.75% acidity. The major free sugars of yacon vinegar were glucose and fructose at 2,072.12 mg% and 463.95 mg%, respectively. The acetic acid content was the highest of the major organic acids at 3,881.44 mg%. The total free amino acid content was 62.88 mg% with the main free amino acids being proline, γ-amino-n-butyric acid and ornithine. The major minerals of yacon vinegar were Ca, K and Mg. The in vivo anti-diabetic activity of yacon vinegar was investigated in high-fat diet (HFD)/streptozotocin (STZ)-induced diabetic mice. Diabetic mice were administered orally with 10% yacon juice and two yacon vinegars (5% and 10%) at a dose of 7 mL/kg body weight once per day for 4 weeks. Five% yacon vinegar improved the fasting blood glucose levels and glucose tolerance test significantly compared to the diabetic control group (p<0.05). Yacon vinegar increased the pancreatic C-peptide concentration in a dose-dependent manner. These results show that 5% yacon vinegar has a more potent effect on ameliorating hyperglycemia than 10% yacon juice.

Role of Wetland Plants as Oxygen and Water Pump into Benthic Sediments (퇴적물내의 산소와 물 수송에 관한 습지 식물의 역할)

  • Choi, Jung-Hyun;Park, Seok-Soon
    • Korean Journal of Ecology and Environment
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    • v.37 no.4 s.109
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    • pp.436-447
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    • 2004
  • Wetland plants have evolved specialized adaptations to survive in the low-oxygen conditions associated with prolonged flooding. The development of internal gas space by means of aerenchyma is crucial for wetland plants to transport O2 from the atmosphere into the roots and rhizome. The formation of tissue with high porosity depends on the species and environmental condition, which can control the depth of root penetration and the duration of root tolerance in the flooded sediments. The oxygen in the internal gas space of plants can be delivered from the atmosphere to the root and rhizome by both passive molecular diffusion and convective throughflow. The release of O2 from the roots supplies oxygen demand for root respiration, microbial respiration, and chemical oxidation processes and stimulates aerobic decomposition of organic matter. Another essential mechanism of wetland plants is downward water movement across the root zone induced by water uptake. Natural and constructed wetlands sediments have low hydraulic conductivity due to the relatively fine particle sizes in the litter layer and, therefore, negligible water movement. Under such condition, the water uptake by wetland plants creates a water potential difference in the rhizosphere which acts as a driving force to draw water and dissolved solutes into the sediments. A large number of anatomical, morphological and physiological studies have been conducted to investigate the specialized adaptations of wetland plants that enable them to tolerate water saturated environment and to support their biochemical activities. Despite this, there is little knowledge regarding how the combined effects of wetland plants influence the biogeochemistry of wetland sediments. A further investigation of how the Presence of plants and their growth cycle affects the biogeochemistry of sediments will be of particular importance to understand the role of wetland in the ecological environment.

Measurement of Phosphorus Buffering Power in Various Soils using Desorption Isotherm (탈착 등온식을 이용한 토양 중 인산 완충력 측정)

  • Lee, Jin-Ho;Doolittle, James J.
    • Korean Journal of Soil Science and Fertilizer
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    • v.37 no.4
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    • pp.220-227
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    • 2004
  • Phosphorus desorption study is essential to understanding P behavior in agricultural and environmental soils because phosphorus is considered as two different aspects, a plant nutrient versus an environmental contaminant. This study was conducted to determine soil P buffering power related to P desorption quantity intensity (Q/I) parameters, Qmax(an index of P release capacity) and l0(an index of the intensity factor), and to investigate the characteristics of relationship between the P desorption Q/I parameters and the soil properties. Soil samples were prepared with treatments of 0 and 100mgPkg1 applied as KH2PO4 solution. The P desorption Q/I curves were obtained by a procedure using anion exchange resin beads and described by an empirical equation (Q=aI1+bln(I+1)+c). The P desorption Q/I curves for the high available P (\g20mgkg1 of Olsen P) soils were characteristic concave trends with or without soil P enrichment, whereas for the low available P (<20mgkg1 of Olsen P) soils, the anticipated Q/I concave curves could not be obtained without a proper amount of P addition. When the soils were enriched in phosphates, the values of desorbed solid phase labile P and solution P, such as Qmax and I0 respectively, were increased, but the ratio of Qmax versus I0 was decreased. Thus, the slope of desorption Q/I curve represented as phosphorus buffering power, |BP0|, is decreased. The |BP0| values of the high available P soils ranged between 48 and 61Lkg1 in the P untreated samples and between 18 and 44Lkg1 in the P enriched samples. Overall |BP0| values of both low and high available P soils treated with l00mgPkg1 ranged between 14 and 79Lkg1. The Qmax, values ranged between 71.4 and 173.1mgPkg1, and the lo values ranged between 0.98 and 3.82mgPL1 in the P enriched soils. The Qmax and I0 values that control the P buffering power may be not specifically related to a specific soil property, but those values were complicatedly related to soil pH, clay content, soil organic matter content, and lime. Also, phosphorus release activity, however, markedly depended on the desorbability of the applied P as well as the native labile P.

Soil Characteristics Differences due to Slope Aspect of Sweet Persimmon Orchard Derived from Porphyritic Residuum (반암(斑岩)에서 유래(由來)된 잔적(殘績) 구릉지(丘陵地) 단감과원(果園)의 경사방향별(傾斜方向別) 토양특성(土壤特性) 연구(硏究))

  • Yun, Eul-Soo;Jung, Yeun-Tae;Kim, Jung-Kon;Son, Il-Soo;Kang, Hang-Won
    • Korean Journal of Soil Science and Fertilizer
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    • v.26 no.3
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    • pp.143-150
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    • 1993
  • To gain the basic informations on soil management practices by determination of the differences of soil genetic characteristics and the contents of soil moisture due to slope aspects of hilly land, this study was conducted at 1992 on sweet persimmon orchard soils derived from porphyry in southern of Korea. The results obtained were summarized as follows. The soils studied were belong to fine loamy family. The degree of soil development was greater in the north than other slope aspects and the solum thickness also the same. The soil chemical properties such as pH and exchangeable cations except for potassium were low generally in the orchards studied but the content of organic matter was lack in the summit and south aspect. The contents of Fe oxide and extractable Al were higher in the subsurface than surface. Fe, Al and clay indexes which indicate relative intensity of B horizon development were higher in the side slope than summit and the highest in the north slope. The rate of solum to B horizon was higher as about 1.5 for summit and west aspect which had thiner B horizon thickness compared to other aspect. North and west aspect had certainly more amount of soil water at drought season than other slope aspects and was lower the difference of soil water between the drought and wet seasons. Therfore, the soil management such as erosion control and irrigation at drought season should be practices differently due to slope aspect and soil chararteristics in the sloped land.

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Review of Production, Husbandry and Sustainability of Free-range Pig Production Systems

  • Miao, Z.H.;Glatz, P.C.;Ru, Y.J.
    • Asian-Australasian Journal of Animal Sciences
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    • v.17 no.11
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    • pp.1615-1634
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    • 2004
  • A review was undertaken to obtain information on the sustainability of pig free-range production systems including the management, performance and health of pigs in the system. Modern outdoor rearing systems requires simple portable and flexible housing with low cost fencing. Local pig breeds and outdoor-adapted breeds for certain environment are generally more suitable for free-range systems. Free-range farms should be located in a low rainfall area and paddocks should be relatively flat, with light topsoil overlying free-draining subsoil with the absence of sharp stones that can cause foot damage. Huts or shelters are crucial for protecting pigs from direct sun burn and heat stress, especially when shade from trees and other facilities is not available. Pigs commonly graze on strip pastures and are rotated between paddocks. The zones of thermal comfort for the sow and piglet differ markedly; between 12-22C for the sow and 30-37C for piglets. Offering wallows for free-range pigs meets their behavioural requirements, and also overcomes the effects of high ambient temperatures on feed intake. Pigs can increase their evaporative heat loss via an increase in the proportion of wet skin by using a wallow, or through water drips and spray. Mud from wallows can also coat the skin of pigs, preventing sunburn. Under grazing conditions, it is difficult to control the fibre intake of pigs although a high energy, low fibre diet can be used. In some countries outdoor sows are fitted with nose rings to prevent them from uprooting the grass. This reduces nutrient leaching of the land due to less rooting. In general, free-range pigs have a higher mortality compared to intensively housed pigs. Many factors can contribute to the death of the piglet including crushing, disease, heat stress and poor nutrition. With successful management, free-range pigs can have similar production to door pigs, although the growth rate of the litters is affected by season. Piglets grow quicker indoors during the cold season compared to outdoor systems. Pigs reared outdoors show calmer behaviour. Aggressive interactions during feeding are lower compared to indoor pigs while outdoor sows are more active than indoor sows. Outdoor pigs have a higher parasite burden, which increases the nutrient requirement for maintenance and reduces their feed utilization efficiency. Parasite infections in free-range pigs also risks the image of free-range pork as a clean and safe product. Diseases can be controlled to a certain degree by grazing management. Frequent rotation is required although most farmers are keeping their pigs for a longer period before rotating. The concept of using pasture species to minimise nematode infections in grazing pigs looks promising. Plants that can be grown locally and used as part of the normal feeding regime are most likely to be acceptable to farmers, particularly organic farmers. However, one of the key concerns from the public for free-range pig production system is the impact on the environment. In the past, the pigs were held in the same paddock at a high stocking rate, which resulted in damage to the vegetation, nutrient loading in the soil, nitrate leaching and gas emission. To avoid this, outdoor pigs should be integrated in the cropping pasture system, the stock should be mobile and stocking rate related to the amount of feed given to the animals.

Effect of Supercritical Carbon Dioxide on Physicochemical Properties and Microbial Reduction of Freeze-Dried Bovine Liver (초임계 이산화탄소 처리가 동결 건조된 소간의 이화학적 특성 및 미생물 저감화에 미치는 영향)

  • Kim, Hye-Min;Woo, Sung-Woon;Kim, Ah-Na;Heo, Ho-Jin;Chun, Ji-Yeon;Choi, Sung-Gil
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.44 no.12
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    • pp.1847-1855
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    • 2015
  • Supercritical carbon dioxide (SCCO2) treatment has been becoming an important method for substituting the use of organic solvents for samples extraction prior to analysis due to its low toxicity, ease of handling, low cost of disposal etc. Freeze-dried bovine liver was treated with SCCO2 under different pressures (200, 300, and 450 bar) in order to investigate effects on physicochemical properties and reduction of microbial load. The yield of lipid extraction from bovine liver by SCCO2 treatment increased with increasing pressure, with values of 84, 86, and 90% in response to 200, 300, and 450 bar, respectively. Results of high performance liquid chromatography analysis showed that vitamin A and coenzyme Q10 (CoQ10), which is soluble in lipid, were almost removed from bovine liver by SCCO2 treatment. Saturated fatty acids ratio of bovine liver decreased with increasing pressure, whereas polyunsaturated fatty acids increased with increasing pressure. Total content of amino acids in bovine liver treated by SCCO2 was less than that of the control sample without treatment. The number of aerobic bacteria in bovine liver, which was stored at 5C for 5 days and freeze-dried, decreased from 6.2 to 4.2 log CFU/g by SCCO2 treatment at 100 bar for 3 h. Interestingly, coliform bacteria were not found in the bovine liver sample by SCCO2 at 100 bar for 3 h under all storage conditions. This indicates that SCCO2 treatment can effectively reduce coliform bacteria in the food matrix even at low moisture. In conclusion, freeze-dried bovine liver by proper SCCO2 treatment may be used as a potential high protein source, with increasing microbial safety and stability of lipid oxidation.

Development of Functional Vinegar by Using Cucumbers (오이를 이용한 기능성 식초 음료 개발)

  • Hong, Sung-Min;Moon, Hyun-Sil;Lee, Ju-Hye;Lee, Hae-In;Jeong, Ji-Hye;Lee, Mi-Kyung;Seo, Kwon-Il
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.41 no.7
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    • pp.927-935
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    • 2012
  • This study was performed to develop functional vinegar by using cucumbers through two stages of fermentation. The alcohol content was maximized (7.8%) after 6-days of alcohol fermentation at 25C by adjusting the initial sugar concentration to 15Brix, and vinegar with an acidity of 5.8% was obtained after 12-days of acetic acid fermentation at 30C. The major sugars in the produced vinegar were glucose and fructose, which were present in concentrations of 3,067.26 and 395.73 mg%, respectively. The major organic acids were acetic acid and succinic acid, which were present in concentrations of 4,410.5 and 841.11 mg%, respectively. The total free amino acid content of the cucumber vinegar was 181.45 μg/mL and citrulline, valine, aspartic acid, asparagine, and ornithine were the major amino acids. The inorganic components included various alkaline elements, such as K, Ca, and Mg. In addition, experimental methods to assess the DPPH and ABTS+ radical-scavenging ability, reducing power, and β-carotene bleaching activity showed that the cucumber vinegar had strong antioxidant properties. The total polyphenol content, which are the major components responsible for the antioxidant activities of the cucumber vinegar, was 40.14 mg/100 mL. The cucumber vinegar showed significantly higher hepatic aldehyde dehydrogenase activity when compared to the alcoholic control (negative) and the marketing drink (positive), resulting in decreased plasma acetaldehyde concentrations in rats. These results demonstrate that cucumber vinegar possesses antioxidant properties and holds great promise for use in preventing hangovers.

Fertilization Effects on Soil Properties, Understory Vegetation Structure and Growth of Pinus densiflora Seedlings Planted after Forest Fires (산불피해지에 식재 조림된 소나무임분의 시비처리에 따른 소나무 묘목의 생장, 토양특성 및 하층식생 구조의 변화)

  • Won, Hyung-kyu;Lee, Yoon Young;Jeong, Jin-Hyun;Koo, Kyo-Sang;Lee, Choong-Hwa;Lee, Seung-Woo;Jeong, Yong-Ho;Kim, Choonsig;Kim, Hyungho
    • Journal of Korean Society of Forest Science
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    • v.95 no.3
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    • pp.334-341
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    • 2006
  • This study was to investigate the growth of planted red pine (Pinus densiflora S. et. Z.) seedling, soil properties and understory vegetation structure after fertilizer treatments [unfertilized plot (control), CF plot (Combination Fertilizer), UF plot (Urea Formaldehyde Fertilizer)] in a Pinus densiflora stand planted after the forest fires in Gosung, Gangwon province. The height growth rates of seedlings in four years were 264% in unfertilized, 404% in CF, and 388% in UF plots, respectively. The root collar diameters were increased 340% in unfertilized, 454% in CF, and 427% in UF plots, respectively. No significant changes occurred in soil total nitrogen and potassium ion (K+) with the fertilization. However, available P2O5, content in the soil surface (0-15 cm) increased with the fertilizer application. Soil organic matter increased significantly with fertilizer treatments, while gradual decrease occurred in unfertilized plots. Sodium ion (Na) decreased in all sites. Soil pH, CEC, calcium ion (Ca2+) and magnesium ion (Mg2+) contents were not significantly different among treatments. Although Shannon's species diversity index and species richness in understory vegetation did not change with fertilizer treatments, vegetation cover rates in forest floor increased significantly with the fertilization. These results suggest that the increase of pine seedling growth and vegetation cover rates with fertilization could enhance soil stabilization in forest tire areas.