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Dilara Ozturk,Mehmet Gülcan 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.122 No.-
Developing effective and highly stable Heterogeneous electro-Fenton (HEF) catalysts for removingorganic pollutants from aquatic environments is a challenge in the scientific world. In this study, activatedcarbon/Goethite/Fe3O4/ZnO was synthesized as a novel eco-friendly and economic HEF catalystto remove chemical oxygen demand (COD) from woolen textile wastewater (WTW). According to characterizationanalyses, the catalyst was in a polycrystalline structure, had good stability (-34.53 mV),and had an average pore diameter was 8.017 nm. According to catalytic activity results, COD removalby anodic oxidation (AO) was 44.29%, AO-H2O2 was 58.99%, and adsorption was 18.5%. OH and O2 –responsible for COD removal with 76.21% and 28.07%. The low p-value (<0.0001), high F-value(456.90), high Adeq. the precision value (76.74) and high R2 (0.9977) of the model show that the establishedquadratic model is significant, valid, successful in estimating data, and reliable in navigating designspace. Optimal conditions were determined as aeration rate: 2.86 L/min, current density: 5.38 mA/cm2,catalyst dose: 0.194 g/L, reaction time: 85.41 min. COD removals were determined experimentally andtheoretically as 96.39% and 98.66%. The total cost was $ 1.75 to remove 1 kg COD from WTW. The synthesizedcatalyst showed good performance over five cycles (82%), suggesting its use on an industrialscale.
Yesim Cekin,Aylin Erman Daloğlu,Dilara Öğünç,Betil Özhak Baysan,Duygu Dağlar,Dilara İnan,Derya Mutlu,Gözde Öngüt,Dilek Çolak 대한진단검사의학회 2013 Annals of Laboratory Medicine Vol.33 No.5
Background: Active screening for vancomycin-resistant enterococci (VRE) using rectal specimens is recommended to limit the spread of antimicrobial resistance within certain high-risk populations. We evaluated the diagnostic performance of Vancomycin Resistance 3 Multiplexed Tandem PCR assay (AusDiagnostics, Australia), a rapid multiplex realtime PCR assay that detects vanA and/or vanB. Methods: Two-hundred-and-eleven rectal swabs from Hematology and Oncology unit were submitted for VRE surveillance via direct detection of vanA and/or vanB by culture and by using Vancomycin Resistance 3 Multiplexed Tandem PCR assay. Enterococci were identified to the species level by using standard biochemical tests and BD Phoenix Automated Microbiology System (BD Diagnostic Systems, USA). Vancomycin susceptibility of enterococci was determined using Etest (BioMerieux, France). Results: Compared to the culture method, Vancomycin Resistance 3 Multiplexed Tandem PCR assay had a sensitivity of 84.0%, specificity of 98.8%, positive predictive value (PPV)of 91.3%, and negative predictive value (NPV) of 97.6%. The assay failed to detect 18(8.5%) specimens because of the presence of PCR inhibitors; of the remaining 193 specimens,25 (12.9%) were positive, 23 for vanA, and 2 for vanB. Although both sensitivity and specificity for vanA VRE was 100% compared to the culture method, all vanB-positive specimens tested negative by VRE culture. Conclusions: Vancomycin Resistance 3 Multiplexed Tandem PCR assay is a rapid and laborsaving option for VRE surveillance for direct use on rectal swabs. However, the high rate of PCR failure owing to the inhibitors in the specimens and the low specificity for vanB should be considered when interpreting the results.
Maheshkumar Kuppusamy,Dilara Kamaldeen,Ravishankar Pitani,Julius Amaldas,Padmavathi Ramasamy,Poonguzhali Shanmugam,Venugopal Vijayakumar 한국한의학연구원 2020 Integrative Medicine Research Vol.9 No.1
Background: This study was conducted among healthy adolescents to assess the effects of a yoga breathing practice (Bhramari pranayama, Bhr.P) towards cardiac autonomic function using heart rate variability (HRV) parameters. Methods: Of the 730 eligible subjects screened, 520 healthy adolescents who met the inclusion and exclusion criteria were randomly assigned to either yoga breathing group (n = 260) or control group (n = 260). The yoga breathing group practiced Bhr.P. five days a week for a duration of six months while the control group continued with their daily routine without any intervention. Outcome measures were time and frequency domain of HRV in both groups which were assessed before and after the intervention using Lead II ECG. Linear models were used in the analysis of short term HRV. Results: After 6 months of yoga breathing, the time domain parameters of short term HRV showed significant (P < 0.05) improvement towards the parasympathetic domain. Frequency domain parameters also showed the same direction of changes. In contrast, control group subjects showed a trend towards a sympathetic domain. Conclusion: The present study showed a positive shift in cardiac autonomic modulation towards parasympathetic predominance after 6 months of yoga breathing practice among apparently healthy adolescents.
Camgöz Berkay,Tarım Dilara 한국원자력학회 2023 Nuclear Engineering and Technology Vol.55 No.8
Brachytherapy is a special case of radiotherapy. It should be arranged according to some principles in medical radiation applications and radiation physics. The primary principle is to use as low as reasonably achievable dose in all ionizing radiation applications for diagnostic and therapeutic treatments. Dosimetric distributions are dependent on radioactive source properties and radiation-matter interactions in an absorber medium such as phantom or tissue. In this consideration, the geometrical structure and material of the seed capsule, which surrounds a radioactive material, are directly responsible for isodose profiles and dosimetric functions. In this study, the radiometric properties of capsule material were investigated on dose distribution in a water phantom by changing its nuclear properties using the EGSnrc Monte Carlo (MC) simulation code. Effective atomic numbers of hypothetic mixtures were calculated by using different elements with several fractions for capsule material. Model 6711 brachytherapy seed was modeled by EGSnrc/Dosrcnrc Code and dosimetric functions were calculated. As a result, dosimetric parameters of hypothetic sources have been acquired in large-scale atomic number. Dosimetric deviations between the data of hypothetic seeds and the original one were analyzed. Unit dose (Gy/Particle) distributions belonging to different types of material in seed capsule have remarkably differed from the original capsule's data. Capsule type is major variable to manage the expected dose profile and isodose distribution around a seed. This study shows us systematically varied scale of material type (cross section or effective atomic number dependent) offers selective material usage in production of seed capsules for the expected isodose profile of a specific source
Hasinul Elahi,Shiful Islam,Dilara Begum 건국대학교 GLOCAL(글로컬)캠퍼스 지식콘텐츠연구소 2018 International Journal of Knowledge Content Develop Vol.8 No.1
The purpose of the study is to identify the perception of the Library and Information Science (LIS) specialists about the use of mobile phones in retrieving information. It investigates the present status of the LIS specialists regarding mobile phone usage, perceptions regarding the use of mobile phones in retrieving information from libraries and points out the possible drawbacks and their solutions for embracing mobile phones in retrieving information from libraries and providing some suggestions. The methodology includes a quantitative approach. The authors used a survey method using a structured questionnaire to measure the perception of LIS specialists regarding the use of mobile phones in retrieving information from libraries. The findings confirmed that the majority (72%) of LIS specialists have the experience of using mobile phones for more than 10 years. Findings also indicate that the LIS specialists have agreed with the statements of advantages of using mobile phones. This paper concludes that the respondents also agreed regarding the possible advantages of introducing mobile phones in retrieving information from libraries. The paper explores the original perceptions of LIS specialistsregarding the use of mobile phones in retrieving information from libraries.
Tauhidur R. Nurunnabi,Farah Sabrin,Dilara I. Sharif,Lutfun Nahar,Md. H. Sohrab,Satyajit D. Sarker,S.M. Mahbubur Rahman,Md. Morsaline Billah 경희대학교 융합한의과학연구소 2020 Oriental Pharmacy and Experimental Medicine Vol.20 No.3
Endophytic fungi reside in the intercellular space of plant nourished by the plant. In return, they provide bioactive molecules which can play critical roles on plant defense system. Fifty six endophytes were isolated from the leaves, root, bark and fruits of Sonneratia apetala, a pioneer mangrove plant in the Sundarbans, Bangladesh. A total of 56 isolates were obtained and 12 different species within 8 genera were identified using morphological and molecular characteristics. Antimicrobial activity of ethyl acetate (EtOAc) and methanolic (MeOH) extracts of these 12 different species were analyzed by resazurin assay and the minimum inhibitory concentrations (MICs) were determined. The fungal extracts showed antimicrobial activities against more than one tested bacterium or fungus among 5 human pathogenic microbes, i.e. Escherichia coli NCTC 12241, Staphylococcus aureus NCTC 12981, Micrococcus lutus NCTC 7508, Pseudomonas aeruginosa NCTC 7508 and Candida albicans ATCC 90028. Overall, methanolic extracts showed greater activity than that of ethyl acetate extracts. Of the isolates identified, Colletotrichum gloeosporioides, Aspergillus niger and Fusarium equiseti were the most active isolates and showed activity against microorganisms under investigation. Methanolic extracts of C. gloeosporioides and A. niger showed the lowest MIC (0.0024 mg/mL) against P. aeruginosa. The study indicates that endophytic fungi isolated from S. apetala species possess potential antimicrobial properties, which could be further investigated.