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Md. Mobarak Hossain Khan,Aklimunnessa Khan,Masahiro Nojima,Sadao Suzuki,Yoshihisa Fujino,Shinkan Tokudome,Koji Tamakoshi,Mitsuru Mori,Akiko Tamakoshi 대한부인종양학회 2013 Journal of Gynecologic Oncology Vol.24 No.3
Objective: This study mainly aimed to investigate the association of ovarian cancer mortality with reproductive factors and body mass index among Japanese women aged 40-79 years. Methods: The source of the data was the Japan Collaborative Cohort (JACC) study which covered the period of 1988 to 2009. A representative sample of 64,185 women was used. Cox model was used to estimate the relative risk (RR) and 95% confidence interval (CI). Results: The total number of ovarian cancer deaths was 98, with a mortality rate of 9.30 per 100,000 person-years. Women with single marital status revealed significantly higher age-adjusted RR (RR, 4.11; 95% CI, 1.66 to 10.23; p=0.005) as compared to married women. The effect of single marital status was stronger among older women aged 50+ years (RR, 4.58; 95% CI, 1.65 to 12.72; p=0.003) than younger women. An elevated risk was found for both nulliparous and nullipregnant women. Similarly, an increased risk of ovarian cancer mortality was estimated among overweight among aged 50 years or less. Conclusion: Out of many factors only single marital status indicated a higher risk for ovarian cancer mortality. All other factors provided inconclusive results, which imply further epidemiological investigations.
Taimur-Al-Mobarak,M. F. Mina,M. A. Gafur,A. N. Ahmed,S. A. Dhar 한국섬유공학회 2018 Fibers and polymers Vol.19 No.1
Sponge-gourd (SG) natural fibers obtained from Luffa cylindrica plant were chemically treated separately using alkali (5, 10, and 15 wt%), acetic anhydride (5, 10, and 15 wt%), and benzoyl chloride (5, 10, and 15 wt%). Both untreated and chemically treated SG fibers (SGFs) were subsequently characterized using a field emission scanning electronmicroscope, a Fourier transform infrared spectrometer, an X-ray diffractometer, a universal testing machine, and a thermogravimetric analyzer. Surface analysis by scanning electron microscopy shows that the alkali treatments promote better outer surface layer than other treatments of the SGF with the exposition of inner fibrillar structure, thereby increasing roughness of the fiber surface. Alkali treatment also improves the crystallinity and exhibits new chemical bond formation inthe SGF. The tensile strength and Young’s modulus have been analyzed through a two-parameter Weibull distribution model, where a significant increase in mechanical property of benzoylated fibers has been observed. The thermal stability of the modified fibers is also found to increase by acetic anhydride treatment.
Ayeasha AKHTER,Md. Mobarak KARIM,K. M. Anwarul ISLAM 한국유통과학회 2022 The Journal of Asian Finance, Economics and Busine Vol.9 No.3
In Bangladesh, developing students’ entrepreneurial intentions have received a lot of attention because of the country’s current employment predicament and shifting labor market. Entrepreneurs play a critical part in a country’s economic development. This study aims to examine the impact of creativity and innovation on students’ intentions toward online entrepreneurship in Bangladesh. The participants in this study were Bangladeshi university students. Based on pre-tested constructs, a survey questionnaire was created. Convenience sampling, which is a common type of non-probability sampling, was used to choose participants for the sample. A total of 150 students from the public university took part in the survey, with 120 replies being accepted as complete, resulting in an 80 percent response rate. Hence, the sample size is 120. Internal consistency was determined using Cronbach’s alpha, while correlation and hypothesis tests were analyzed using SPSS version 26.0. The results reveal that creativity and innovation have a statistically significant and positive impact on students’ intentions to engage in online entrepreneurship. These two independent factors explained 75% of the variance in intention to engage in online entrepreneurship, resulting in empirical findings and solid information in the present body of knowledge. The study concludes with a conclusion and research implications for the future.
Selective Oxidation of Olefins Catalyzed by Polymer-anchored Nickel(Ⅱ) Complex in Water Medium
Manirul Islam,Dildar Hossain,Paramita Mondal,Anupam Singha Roy,Sanchita Mondal,Manir Mobarak 대한화학회 2010 Bulletin of the Korean Chemical Society Vol.31 No.12
Selective oxidation of olefins has been carried out in water medium with tert-butylhydroperoxide (TBHP, 70% aqueous)as an oxidant using polymer-anchored Ni(Ⅱ) complex as a catalyst. Several parameters were varied to optimize the reaction conditions. Under the optimized reaction conditions olefins gave selectively allylic oxidation products. The present polymer anchored Ni(Ⅱ) complex can be recycled five times without any appreciable loss in catalytic activity.
Selective Oxidation of Olefins Catalyzed by Polymer-anchored Nickel(II) Complex in Water Medium
Islam, Manirul,Hossain, Dildar,Mondal, Paramita,Roy, Anupam Singha,Mondal, Sanchita,Mobarak, Manir Korean Chemical Society 2010 Bulletin of the Korean Chemical Society Vol.31 No.12
Selective oxidation of olefins has been carried out in water medium with tert-butylhydroperoxide (TBHP, 70% aqueous) as an oxidant using polymer-anchored Ni(II) complex as a catalyst. Several parameters were varied to optimize the reaction conditions. Under the optimized reaction conditions olefins gave selectively allylic oxidation products. The present polymer anchored Ni(II) complex can be recycled five times without any appreciable loss in catalytic activity.
Md,Atikur RAHAMAN,Kaniz Fatema LUNA,Zhao Lin PING,Mohammad Saiyedul ISLAM,Md. Mobarak KARIM 한국유통과학회 2021 The Journal of Asian Finance, Economics and Busine Vol.8 No.5
In the current technology-driven era, Small and medium enterprises (SMEs) have been deemed as one of the leading and prominent drivers of sustainable economic progress in emerging and developing economies such as in the Bangladesh context. Hence, it is of significance to understand what might fuel accelerating performance of SME business as increased SME performance will bring about more sustainability and strong development of SME sector within the country, through which more employment is anticipated to be generated. Therefore, the current study examines the impact of three factors: risk-taking, innovativeness, and proactiveness on SME performance in Bangladesh. The study has gathered data from SME entities in Dhaka city of Bangladesh, by applying a non-probability sampling strategy. 250 SME owners were contacted to act as respondents and finally, 180 SME owners fully completed the survey questionnaire, indicating that the final sample size is n=180. SPSS is used as a purpose of testing the hypotheses by considering a 5% significance level as acceptance criteria of the hypothesis. Hierarchical regression analysis was run to understand the impact of control variables and independent variables on SME performance and found that age of business, risk-taking, innovativeness, and proactiveness have an important impact on SME performance in Bangladesh.