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Sabina Yeasmin,Il Jun Kwon,Dong Jun Kwon,Jungeon Lee,Jeong Hyun Yeum,Byung Chul Ji,Jae Min Park,Seong Baek Yang 한국섬유공학회 2022 Fibers and polymers Vol.23 No.3
In this study, pullulan (PULL) nanocomposite films containing tempo cellulose nanofibrils (TOCNs) and Agnanoparticles were successfully prepared using a solution casting technique in aqueous solutions. X-ray diffraction resultsand optical microscopy images revealed the coexistence of Ag and PULL/TOCNs blend matrix as well as the uniformdistribution of Ag nanoparticles. The Fourier-transform infrared data showed that a good interaction occurred betweenTOCNs, Ag, and PULL matrix; the prepared composite film showed improved characteristics including higher tensilestrength, thermal stability, water barrier properties and reduced moisture susceptibility compared to a neat PULL film. Inaddition, the prepared film is biodegradable and possesses antimicrobial characteristics. These excellent properties clearlyindicate that this type of ternary nanocomposite film may have prospective food packaging and medical application.
Score Based Risk Assessment of Lung Cancer and its Evaluation for Bangladeshi People
Mukti, Roushney Fatima,Samadder, Pratul Dipta,Emran, Abdullah Al,Ahmed, Farzana,Imran, Iqbal Bin,Malaker, Anyanna,Yeasmin, Sabina Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.17
Background: The problem of cancer, especially lung cancer, is very acute in Bangladesh. The present study was conducted to evaluate the risk of lung cancer among Bangladeshi people based on hereditary, socio-economic and demographic factors. Materials and Methods: This study was carried out in 208 people (patients-104, controls-104) from January 2012 to September 2013 using a structured questionnaire containing details of lung cancer risk factors including smoking, secondhand smoke, tobacco leaf intake, age, gender, family history, chronic lung diseases, radiotherapy in the chest area, diet, obesity, physical activity, alcohol consumption, occupation, education, and income. Descriptive statistics and testing of hypotheses were used for the analysis using SPSS software (version 20). Results: According to this study, lung cancer was more prevalent in males than females. Smoking was the highest risk factor (OR=9.707; RR=3.924; sensitivity=0.8872 and P<0.0001) followed by previous lung disease (asthma, tuberculosis etc.) (OR=7.095; RR=1.508; sensitivity=0.316 and P<0.0001)) for male patients. Highly cooked food (OR=2.485; RR=1.126; sensitivity=0.418 and P=0.004)) and also genetic inheritance (OR=1.93; RR=1.335; sensitivity=0.163 and P=0.138) demonstrated significant correlation with lung cancer as risk factors after these two and alcohol consumption was not prevalent. On the other hand, for female patients, tobacco leaf intake represented the highest risk (OR=2.00; RR=1.429; sensitivity= 0.667 and P=0.5603) while genetic inheritance and highly cooked food also correlate with lung cancer but not so significantly. Socioeconomic status and education level also play important roles in causing lung cancer. Some 78.5% male and 83.3% of female cancer patients were rural residents, while 58.2% lived at the margin or below the poverty line. Most male (39.8%) and female (50.0%) patients had completed only primary level education, and 27.6% male and 33.3% female patients were illiterate. Smoking was found to be more prevalent among the less educated persons. Conclusions: The results obtained in this study indicate the importance of creating awareness about lung cancer risk factors among Bangladeshi people and making appropriate access to health services for the illiterate, poor, rural people.
Kwon, Il Jun,Park, Sung Min,Jeong, Min Gi,Yang, Seong Baek,Yoo, Sung Hun,Jeong, Dae Won,Sabina, Yeasmin,Oh, Weontae,Choi, Jin Hyun,Yeum, Jeong Hyun American Scientific Publishers 2016 Journal of Nanoscience and Nanotechnology Vol.16 No.11
<P>Poly(vinyl acetate) (PVAc)/poly(vinyl alcohol)/carbon nanotube (CNT) nanocomposite microspheres with a core/shell structure were prepared by heterogeneous saponification of a PVAc/CNT microsphere suspension polymerized for the first time. We investigated the effects of various polymerization conditions on the conversion of vinyl acetate (VAc) into PVAc, such as time, temperature, and CNT concentration. The results indicated that the rate of polymerization decreased with CNT addition. In addition, the time and temperature had significant effects on the polymerization rate, and it was difficult to obtain higher conversion of VAc into PVAc at lower temperature and time. However, 65% conversion could be achieved despite the presence of CNTs at low temperature for a polymerization time of 25 h. Field-emission scanning electron microscopy was performed to examine the CNT distribution in the PVAc microspheres, and the results revealed that CNT particles were completely inserted into the polymer matrix, indicating that PVAc/CNT microspheres could be prepared by in situ suspension polymerization. The detailed structure of the PVAc/CNT microspheres was determined using X-ray diffraction analysis, and the results suggested that CNTs were inserted into PVA microspheres, and PVAc/CNT nanocomposite microspheres were successfully prepared with 0.5 wt.% CNTs. The effects of various CNT concentrations on the degree of saponification of PVAc were examined using optical microscopy at various saponification times, and H-1-NMR results indicated that the saponification rate increased significantly with increasing CNT concentration and that almost fully saponified PVA microspheres were obtained in the presence of 0.5 wt.% CNTs for a saponification time of 120 h.</P>