Effects of dietary supplementation with probiotic CS-A on performance in broiler chickens

Seong Soo Kang1*, Se Eun Kim, Ara Go, Kyung Mi Shim, Chun Sik Bae, Chang Jong Moon, Sung-Ho Kim, Jong-Choon Kim, Jin-Cheol Yoo, Seung Sik Cho 충북대학교 동물의학연구소 2012 Journal of Biomedical and Translational Research Vol.13 No.3

Probiotics, enzymes, organic acids, oligosaccharides, antioxidants, and other functional materials are actively being explored as alternatives to antibiotics. Probiotics include live beneficial microorganisms that colonize the intestinal tract and competitively inhibit attachment and growth of harmful microbes. Probiotics also increase feed efficiency by assisting in nutrient absorption and digestion. The current study was conducted in order to evaluate the effect of a new probiotic, CS-A, as a dietary supplement of a fermented product on growth performance, feed intake, and feed conversion efficiency in broiler chickens, and to evaluate its value as an alternative for antibiotics used as a feed additive. Antibacterial and anti-inflammatory effects of CS-A were investigated in vitro and the in vivo effects of a constant concentration of supplemented CS-A on growth rate and feed efficiency were evaluated. In addition, the safety of CS-A was assessed by examination of common symptoms and mortality. Determination of minimal inhibitory concentration revealed an excellent antibacterial effect of CS-A. Cytotoxicity was low and anti-inflammatory effects were achieved at the effective concentration of CS-A. Supplementation with 0.1% CS-A resulted in a feed efficiency score of 1.84 in broilers, compared to 2.00 in the control group. There were no adverse clinical findings, necropsy findings, hematology, and altered serum biochemistry parameters, and no mortality. Thus, it is concluded that CS-A is safe and effective as a feed additive.

ATM망에서 ABR 트래픽 제어방법에 관한 연구

강경숙,김복심,안기중 濟州大學校 産業技術硏究所 2000 산업기술연구소논문집 Vol.11 No.1

This paper proposes an enhanced ERICA+ Algorithm. which calculates FS based on MCR. to provide accurate fair allocation. It provides MCR guarantees and fairly divides the remained available bandwidth. Simulation results show that the proposed algorithm achieves a better performance in link utilization. fairness, and transient response. Therefore, this proposed algorithm seems to be suitable for various ABR services properly with raising the fairness in ATM Networks.

차량용 와이퍼 시스템 프레임의 형상 최적설계

강경수,이종호,우호길 충남대학교 공업교육연구소 2002 論文集 Vol.25 No.1

In this study, a shape optimization for a frame of a vehicle windshield wiper system is presented. This study investigated how to optimize a shape and minimize mass(volume) and the number of parts with sufficient strength of a frame instead of a conventional structure. The dffectiveness of this analysis procedure is expected to reduce development lead time &cost actually.

고주파 전극도자 절제술로 치료한 부자간에 발생한 Wolff-Parkinson-White 증후군

강보현,김현중,남궁준,김준수,홍경표,박정의,서정돈 대한순환기학회 2002 Korean Circulation Journal Vol.32 No.8

식품공장폐수의 활성오니처리중 오존에 의한 산화분해효과

강경수,최영찬,하진환,송대진 濟州大學校 工科大學 産業技術硏究所 1991 産業技術硏究報告 Vol.2 No.-

For the increase of treatment efficiency when waste water which included residual chlorine was biologically treated with activated sludge, elimination efficiency of COD and change of transmittance by activated sludge method were examined after the treatment of residual chlorine with ozone of 100 volt and l0ℓ-air/min., 0.8g-0_(3)/hr. in velocity. The results were as follows. 1) When the sample which included residual chlorine was treated with ozone of 0.8g-O_(3)/hr., COD removal rate by the change of pH and ozonization time was more efficient than acidity solution of pH 3.2(20%) and alkaline solution of pH 12.0(10%). Since the COD removal rate become 35% after 50 minutes of ozonization time at neutral solution of pH 7.2. 2) After the residual chlorine included sample was treated with ozone for 50 minutes to make the F/M rate of 0.1㎏·BOD/㎏·MLSS, the sample was reacted with activated sludge for 3, 6, 9 and 15 hours. The 6 hours reaction gave 85.8% COD elimination which showed higher efficiency than 60.5% by Na_(2)S_(2)O_(3) treatment togather with shorting efficiency of reaction time. 3) When such sample as polyphenol which gives dark brown color was treated with ozone for 50 minutes after being made into acidic, neutral and alkaline solution. the transmittance increased from 30- 40% to 70% and gave better result in alkaline solution.

포자배양에 의한 박쥐란 (Platycerium bifurcatum (Cav.) C. Chr.)의 대량증식과 순화재배에 관한 연구

姜聲述,梁會亨,曺敬喆,金光秀 全南大學校 農業科學技術硏究所 1998 農業科學技術硏究 Vol.33 No.-

박쥐란(Platycerium bifurcatum (Cav.) C. Chr.)의 기재 대량 증식과 순화배지 개발을 목적으로 포자발아에 적합 배지, 유식물의 발근율 향상을 위한 생장조정제 종류 및 활성탄소의 농도를 구명하고 훈탄, 수태, 바크와 왕겨, 피트와 퍼라이트 및 버미큐라이트와 퍼라이트 등 몇가지 재식 재료의 종류가 박쥐란 유묘의 생육에 미치는 영향에 관하여 알아 보고자 실험은 실시하였다. 포자의 발아는 agar 보다 gelrite 첨가배지에서 좋았다. 포자체의 성장에는 MS 배지 보다 hyponex, Knudson 배지가 좋았다. 생장조정제 종류의 영향에 있어서는 shoot 발생에는 IAA와 NAA 첨가배지에서 양호했고 rooting은 NAA 첨가배지에서만 발생하였다. 활성탄소의 종도에 따른 shoot 발생과 지상부생육은 0.3%에서 가장 양호했고 뿌리수도 같은 경향으로 적정 농도는 0.3∼0.6%였다. 특히 활성탄소의 농도 그 이상인 경우는 근부 발달이 현저히 억제되었다. 유묘의 순화는 훈탄과 수태단용, 피트 + 퍼라이트에서는 신초수, 지상부 및 지하부 생육이 양호한 반면 바크와 왕겨 혼합용토는 식재재료로 부적당하였다. This study was carried out to establish a mass-propagaion system of Platycerium bifurcatum (Cav.) C. Chr. through in vitro culture of spores. Effects of growth regulator and activated charcoal on the in vitro plant development from spores were examined, and an ideal potting material for acclimatization of the sporelings was developed in this experiments. Gelrite was better than agar as gelling agent of the media for spore germination. The gametophytes grew better on hyponex or Knudson medium than on MS medium. The culture medium with IAA and NAA was better for the plant shooting and rooting than the medium containing NAA only. Multiple shoot formation as will as shoot and root growth was promoted by the addition of activated charcoal aat 0.3% to the culture medium, byt, the plant growth, especially root development was retarded when the concentration of charcoal exceeded 0.6% in the culture medium. Carbonized rice hull, sphagnum moss or peat with perlite in pot mixture resulted in the desirable shoot and root growth.

14각형 헥사아자 거대고리 구리(II)착물과 음이온의 반응에 미치는 리간드의 치환기 효과

姜信杰,李成得성득,權在槿,鄭守炅 大邱大學校附設 基礎科學硏究所 1991 基礎科學硏究 Vol.8 No.-

Reactions of copper(In complexes of 1, 8-dimethyl-, 1, 8-diethyl-, and 1, 8-dipropyl-1, 3, 6, 8, 11, 13-hexaazacyclotertradecanes(A, B, and C, respectively) with halide and pseudohalide ions have been studied in aqueous solutions by spectrophotometric method. It is observed that the equilibrium constants(K) of these reactions decrease with the ligand structure in the order A> B>C for anions and decrase with the anions in the order SCN^(-)>N_(3)^(-)>Br^(-)>Cl^(-) for complexes. The values of K increased with increasing temperature. Thermodynamic parameters obtained from the equilibrium constants are investigated.

작용기를 가진 14각형 거대고리 리간드의 니켈(II) 및 구리(II) 착화합물들의 합성

강신걸,정수경,권재근 대구대학교 기초과학연구소 1990 基礎科學硏究 Vol.7 No.-

New nickel(II) and copper(II) complexes of the 14-membered macrocyclic ligands with functional groups 1, 8-bis(2-hydroxyethyl)-1, 3, 6, 8,10,13-hexazacyclotetradecane(H) and 1, 8-bis(2-piperazinoethyl)-1, 3, 6, 8, 10, 13-hexaazacyclotetradecane( I) have been synthesised by the template condensations of ethylenediamine, formaldehyde, and appropriate amines in the presence of the metal ion. The complexes of H and I contain hydroxy ethyl pendant arms and piperazinoethyl pendant arms at the uncoordinated nitrogens of the ligands, respectiviely. [M(H)] (C104)2 (M=Ni(II) or Cu(II)), [M(H2I)] (C104)4(M=Ni(11) or Cu(11)), and [Ni (I )] (C104)2 have square planar geometry with 5-6-5-6 chelate ring sequence. The complexes are extremely stable in crystalline states and relatively stable in highly acidic solutions. Synthesis, characterization, and properties of the complexes are described.

법인세법 제43조의 포괄위임방식에 대한 비판적 고찰 : 기업회계의 발전 및 세법규정의 두 가지 변수를 중심으로

강경규,이수명 明知大學校 經濟硏究所 2002 경영연구 Vol.21 No.2

본 연구에서는 기업회계와 세무회계가 추구하는 목적과 기능이 상이함에도 불구하고 기업회계기준을 과세소득산정에 있어서 우선 적용하도록 한 현행 법인세법 제43조(기업회계기준과 관행의 적용)에 의한 세법에서 기업회계를 적용하는 포괄위임방식(negative system)규정에 대한 문제점을 비판적으로 고찰하여 기업회계와 세무회계의 관계를 근본적으로 재조명하는데 그 목적이 있다. 이를 위하여 주요국의 기업회계와 세무회계와의 관계를 ‘기업회계의 발전정도’와 ‘세법의 회계에 관한 규정정도’의 두 가지 변수를 중심으로 비교·분석하였다. 본 연구결과를 통하여 기업회계와 세무회계의 계량적인 차이조정 방안위주의 연구에서 벗어나 근본적으로 세법에서 기업회계에 대한 기준성을 입법화하여 규정해도 무리가 없을 만큼 우리나라의 기업회계기준이 손색없이 정비되어있는지에 초점을 둔 실무적인 논의가 선행되어야 할 것이다.

새로운 14각형 펜타아자 거대고리 리간드의 Ni(Ⅱ) 및 Cu(Ⅱ) 착화합물의 합성과 성질

강신걸,정수경 대구대학교 부설 과학교육연구소 1992 과학교육 Vol.5 No.-

1, 4, 8, 11-테트라아자운데칸과 포름알데히드 그리고 일차아민류의 주형축합반응으로부터 14각형의 펜타아자 거대고리 리간드인 1-메틸, 1-에틸, 1-프로필, 1-부틸, 1-(2-메틸프로필) 및 1-벤질-1, 3, 5, 10, 13-펜타아자시클로테트라데칸(A, B, C, D, E, 및 F)의 Ni(Ⅱ) 및 Cu(Ⅱ) 착화합물들을 합성하였다. 착화합물[M(L)]^(2+)(M=Ni(Ⅱ)또는Cu(Ⅱ) : L=A, B, C, D, E, 또는 F)에 있는 네 개의 이차 질소원자는 5-6-5-6킬레이트 고리 배열을 한 평면사각형 구조로 배위되어 있으며 알킬기가 배위된 삼차 질소는 배위되지 않은 상태에 있다. 이들 착화합물의 합성과 스펙트럼 및 성질들이 논의된다. 합성된 펜타아자 거댁리 리간드의 Ni(Ⅱ) 및 Cu(Ⅱ) 착화합의 성질들은 유사한 구조의 테트라아자 또는 헥사아자 거대고리 착화합물의 성질과 큰 차이를 나타내지 않는다.