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  1. 541

    Statistics and Analysis of the Relationship between Strength and Age of Coral Concrete by Bo Liang, Lan Rao, Yun Zheng

    Published 2022-01-01
    “…In addition, the effects of water-binder ratio (w/b), total dosage of cementitious materials (b), supplementary cementitious material (SCM) content, and aggregate properties, on the age strength development of coral concrete are studied.…”
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  2. 542

    Africa in the Iron Age, c500 B.C. to A.D. 1400 / by Oliver, Roland Anthony

    Published 1975
    Subjects: “…Iron age Africa. 2182…”
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  3. 543
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  6. 546

    Evaluating the Agreement of Risk Categorization for Fetal Down Syndrome Screening between Ultrasound-Based Gestational Age and Menstrual-Based Gestational Age by Maternal Serum Markers by Pakorn Chaksuwat, Supatra Sirichotiyakul, Suchaya Luewan, Theera Tongsong

    Published 2018-01-01
    “…To evaluate the agreement of risk categorization for Down syndrome screening between ultrasound scan-based gestational age (GA) and last menstrual period-based gestational age in both first and second trimesters by maternal serum markers. …”
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  11. 551

    Socioeconomic disparities in risk perceptions and precautionary actions against COVID-19 among the working age population aged 18–59 in Japan: a cross-sectional study by Kyoko Shimamoto, Yoko Ibuka

    Published 2024-04-01
    “…Although a body of literature examined these key constructs, critical comparative examinations of various risk perceptions and precautionary actions by socioeconomic group are still limited in Japan and Asia.Methods This study examines subjective and objective risk perceptions and precautionary actions against COVID-19 infection among the general working age population aged 18–59 in Japan, focusing on the differences by socioeconomic group and health status. …”
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  12. 552

    Retrospective observational study of the association between changes in physical activity and frailty in middle-aged and older adults: evidence from the Korean Longitudinal Study of Aging (2006–2022) by Eun-Cheol Park, Ye Jun Jung, Junhyuk Kim, Yun Seo Jang

    Published 2025-01-01
    “…Objectives This study aimed to investigate the relationship between changes in physical activity and frailty among middle-aged and older adults in Korea, using panel data from the 2006–2022 Korean Longitudinal Study of Aging (KLoSA).Design Retrospective observational study.Setting For this longitudinal panel study, data were sourced from the KLoSA dataset.Participants We analysed data from 5594 participants (2855 males and 2739 females) extracted from KLoSA data collected between 2006 and 2022.Primary and secondary outcome measures The frailty index was calculated based on 6 clinical domains comprising 34 age-related health deficits. …”
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  13. 553

    Derivation of Pluripotent Cells from Mouse SSCs Seems to Be Age Dependent by Hossein Azizi, Sabine Conrad, Ursula Hinz, Behrouz Asgari, Daniel Nanus, Heike Peterziel, Akbar Hajizadeh Moghaddam, Hossein Baharvand, Thomas Skutella

    Published 2016-01-01
    “…Here, we aimed to answer important and fundamental questions in germ cell biology with special focus on the age of the male donor cells and the possibility to generate embryonic stem cell- (ESC-) like cells. …”
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  14. 554

    Prevalence and correlates of multimorbidity among individuals aged 50 and above in Bangladesh by Faroque Md Mohsin, Padam Kanta Dahal, Md. Badsha Alam, Sarah Tahera Mahmud, Cotton Chakma, Md. Iqbal Hossain, Md. Atikur Rahman Akanda, Maherun Nesa, Rajib Kumar Malakar, Sokal Roy, Shahriar Hasan, Nitai Roy

    Published 2025-01-01
    “…Methods A cross-sectional study was conducted among 600 individuals aged ≥ 50 years living in three districts of Bangladesh. …”
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  15. 555
  16. 556

    Respiratory Protective Equipment Reconsiderations in the Age of SARS-CoV-2 by Wei-Ren Ke, Chih-Chieh Chen, Sheng-Hsiu Huang

    Published 2022-01-01
    “…Some modified procedures can enhance the effectiveness of surgical masks by improving fit. In the age of SARS-CoV-2, there is an urgent need for knowledge about RPEs. …”
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  17. 557

    A Prediction Method of Tensile Young's Modulus of Concrete at Early Age by Isamu Yoshitake, Farshad Rajabipour, Yoichi Mimura, Andrew Scanlon

    Published 2012-01-01
    “…Knowledge of the tensile Young's modulus of concrete at early ages is important for estimating the risk of cracking due to restrained shrinkage and thermal contraction. …”
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  19. 559

    Analysis of Natural Aging Behavior of Asphalt Binder in Cold and Arid Region by Shanglin Song, Meichen Liang, Fujin Hou, Honggang Gao, Yufeng Bi, Haixing Zhang, Meng Guo

    Published 2022-01-01
    “…The results showed that the effects of natural aging and laboratory simulated aging on asphalt binder properties were similar. …”
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  20. 560

    Dental caries characteristics in the first permanent molar in school age children. by Yoel González Beriau, Nora Sexto Delgado, Antonia Francisco Local, Ana Gloria Vázquez de León

    Published 2009-04-01
    “…</span><strong><span style="font-weight: bold; font-family: Tahoma;">Conclusions</span></strong><span style="font-family: Tahoma;"><strong>: </strong>It was needed to perform educative tasks aimed at this age group to avoid further damage to this important tooth, central for the development of the </span><span style="font-family: Tahoma;">stomatognathic system</span><span style="font-family: Tahoma;">.…”
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