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        Resistance to Macrolide, Lincosamide and Streptogramin Antibiotics in Staphylococci Isolated in Istanbul, Turkey

        Aktas, Zerrin,Aridogan, Aslihan,Kayacan, Cigdem Bal,Aydin, Derya The Microbiological Society of Korea 2007 The journal of microbiology Vol.45 No.4

        The purpose of this study was to investigate the prevalence and genetic mechanisms of erythromycin resistance in staphylococci. A total of 102 erythromycin resistant non-duplicate clinical isolates of staphylococci [78. coagulase negative stapylococci (CNS), 24 Staphylococcus aureus] were collected between October 2003 and August 2004 in Istanbul Faculty of Medicine in Turkey. The majority of the isolates were from blood and urine specimens. Antimicrobial susceptibilities were determined by the agar dilution procedure and the resistance phenotypes by the double disk induction test. A multiplex PCR was performed, using primers specific for erm(A), erm(B), erm(C), and msrA genes.. Among the 78 CNS isolates, 57.8% expressed the $MLS_{B}-constitutive$, 20.6% the $MLS_{B}-inducible$, and 21.6% the $MS_B$ phenotypes. By PCR, 78.2% of these isolates harbored the erm(C) gene, 8.9% erm(A), 6.4% erm(B), and 11.5% msrA genes. In S. aureus, the constitutive $MLS_B$ (58.3 %) was more common than the inducible phenotype (20.8%). erm(A) was detected in 50% and erm(C) in 62.5% of the isolates, while 37.5% contained both erm(A) and erm(C). erm(C)-associated macrolide resistance was the most prevalent in CNS, while ermC) and erm(A, C) was the most prevalent in S. aureus.

      • KCI등재

        Resistance to Macrolide, Lincosamide and Streptogramin Antibiotics in Staphylococci Isolated in Istanbul, Turkey

        Zerrin Aktas,Aslihan Aridogan,Cigdem Bal Kayacan,Derya Aydin 한국미생물학회 2007 The journal of microbiology Vol.45 No.4

        The purpose of this study was to investigate the prevalence and genetic mechanisms of erythromycin resistance in staphylococci. A total of 102 erythromycin resistant non-duplicate clinical isolates of staphylococci [78 coagulase negative stapylococci (CNS), 24 Staphylococcus aureus] were collected between October 2003 and August 2004 in Istanbul Faculty of Medicine in Turkey. The majority of the isolates were from blood and urine specimens. Antimicrobial susceptibilities were determined by the agar dilution procedure and the resistance phenotypes by the double disk induction test. A multiplex PCR was performed, using primers specific for erm(A), erm(B), erm(C), and msrA genes. Among the 78 CNS isolates, 57.8% expressed the MLSB-constitutive, 20.6% the MLSB-inducible, and 21.6% the MSB phenotypes. By PCR, 78.2% of these isolates harbored the erm(C) gene, 8.9% erm(A), 6.4% erm(B), and 11.5% msrA genes. In S. aureus, the constitutive MLSB (58.3%) was more common than the inducible phenotype (20.8%). erm(A) was detected in 50% and erm(C) in 62.5% of the isolates, while 37.5% contained both erm(A) and erm(C). erm(C)-associated macrolide resistance was the most prevalent in CNS, while erm(C) and erm(A, C) was the most prevalent in S. aureus.

      • KCI등재

        Effects of Long-term Administration of the Antiaging Hormone Dehydroepiandrosterone Sulfate on Rat Prostates and Testes as Androgen-Dependent Organs

        Cem Sah,Ibrahim Atilla Aridogan,Volkan Izol,Seyda Erdogan,Saban Doran 대한비뇨의학회 2013 Investigative and Clinical Urology Vol.54 No.3

        Purpose: This study aimed to determine the effects of the long-term use of dehydroepiandrosterone sulfate (DHEAS) on rat prostates and testes as well as on serum testosterone and DHEAS levels. Materials and Methods: Thirty male rats aged 4 to 5 months were studied. A DHEAS suspension of 5 mg/kg per rat was administered orally to the 15 rats in the experimental group 5 times a week, whereas saline was administered concurrently to the 15 rats in the control group. Intracardiac blood samples were drawn to determine hormone levels,and histological samples of prostate and testes were evaluated under light microscopy. Results: At the end of the 6-month study period, histological examinations performed on prostate preparations showed that the atrophy score of the experimental group was significantly lower than the scores of the sham and control groups (p<0.001 and p <0.001, respectively). The serum total testosterone and DHEAS levels of the rats in the study group were significantly increased (p<0.001). Conclusions: In our study, we determined that the long-term use of DHEAS does not have any detrimental effects on the prostate or the testis; on the contrary, it protects the prostate from atrophy, which is imperative for the continuation of fertility as well as for increasing serum testosterone and DHEAS levels.

      • KCI등재

        Preventive Effect of Probiotics and α-Tocopherol on Ethanol-Induced Gastric Mucosal Injury in Rats

        Altug Senol,Mehmet Isler,Aynur G. Karahan,Gulden B. Kilic,Hakan Kuleasan,Selcuk Kaya,Muharrem Keskin,Ibrahim Goren,Ulku Saritas,Buket C. Aridogan,Namik Delibas 한국식품영양과학회 2011 Journal of medicinal food Vol.14 No.1

        The protective effect of a probiotic mixture of 13 different bacteria and α-tocopherol on 98% ethanol-induced gastric mucosal injury was evaluated. Levels of gastric mucosal pro- and anti-inflammatory cytokines, malondialdehyde, and secretory immunglobulin A were measured. Rats were allocated into four groups: control, ethanol, probiotic, and α-tocopherol. The control and ethanol groups received skim milk for 14 days. Probiotic and α-tocopherol groups were administered probiotic mixture suspended in skim milk and 100mg/kg α-tocopherol, respectively, by daily gavage for 14 days. On Day 15, gastric lesions were induced by administration of ethanol 98% (1mL) to all rats except those in the control group. Probiotic, but not α-tocopherol, seemed to inhibit ethanol-induced gastric mucosal tumor necrosis factor-α, interferon-γ, and interleukin-2 production (P>.05). Ethanol caused the elevation of mucosal interleukin-4 level (compared to the control, P<.05). Probiotic pretreatment significantly suppressed the ethanol-induced increase of gastric mucosal interleukin-4 levels. Pretreatment with either probiotic or α-tocopherol inhibited the ethanol-induced increase of mucosal malondialdehyde concentration (P<.01 and P<.05, respectively). Probiotic pretreatment enhanced the gastric mucosal secretory immunoglobulin A concentration (P<.001). In conclusion, probiotic mixture and α-tocopherol reduced ethanol-induced gastric mucosal lipid peroxidation, suggesting that they may be beneficial for gastric lesions induced by lower ethanol concentration.

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