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  • 1
    Online Resource
    Online Resource
    American Scientific Publishers ; 2021
    In:  Journal of Nanoelectronics and Optoelectronics Vol. 16, No. 9 ( 2021-09-01), p. 1436-1443
    In: Journal of Nanoelectronics and Optoelectronics, American Scientific Publishers, Vol. 16, No. 9 ( 2021-09-01), p. 1436-1443
    Abstract: Heat compression refers to a modification method that can be adopted to enhance the mechanical and physical properties of bamboo materials. In this paper, the focus was placed on investigating the micromorphology, cellulose crystallinity, chemical composition, and nano-scale mechanical properties of treated bamboo cell walls. The results demonstrated that the heat compression process induced a reduction in the cell lumen of the bamboo cell wall. Besides, the hemicellulose and cellulose content decreased; while the lignin content increased. Moreover, the oven density of bamboo samples increased due to the heat compression process. The elastic modulus and hardness increased from 13.9 MPa and 0.55 MPa to 17.3 MPa and 0.88 MPa, respectively. Further, the creep ratio in the treated group decreased compared with the control one.
    Type of Medium: Online Resource
    ISSN: 1555-130X
    Language: English
    Publisher: American Scientific Publishers
    Publication Date: 2021
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  • 2
    Online Resource
    Online Resource
    Frontiers Media SA ; 2022
    In:  Frontiers in Endocrinology Vol. 13 ( 2022-6-20)
    In: Frontiers in Endocrinology, Frontiers Media SA, Vol. 13 ( 2022-6-20)
    Abstract: This retrospective cohort study explores whether noninvasive chromosome screening (NICS) for aneuploidy can improve the clinical outcomes of patients with recurrent pregnancy loss (RPL) or repeated implantation failure (RIF) in assisted reproductive technology. A total of 273 women with a history of RPL or RIF between 2018 and 2021 were included in this study. We collected data of all oocyte retrieval cycles and single blastocyst resuscitation transfer cycles. For the patients experiencing RPL, NICS reduced the miscarriages rate per frozen embryo transfer (FET), improved the ongoing pregnancies rate and live birth rate: 17.9% vs 42.6%, adjusted OR 0.39, 95% CI 0.16–0.95; 40.7% vs 25.0%, adjusted OR 2.00, 95% CI 1.04–3.82; 38.9% vs 20.6%, adjusted OR 2.53, 95% CI 1.28–5.02, respectively. For the patients experiencing RIF, the pregnancy rates per FET in the NICS group were significantly higher than those in the non-NICS group (46.9% vs. 28.7%, adjusted OR 2.82, 95% CI 1.20–6.66). This study demonstrated that the selection of euploid embryos through NICS can reduce the miscarriage rate of patients experiencing RPL and improve the clinical pregnancy rate of patients experiencing RIF. Our data suggested NICS could be considered as a possibly useful screening test in clinical practice.
    Type of Medium: Online Resource
    ISSN: 1664-2392
    Language: Unknown
    Publisher: Frontiers Media SA
    Publication Date: 2022
    detail.hit.zdb_id: 2592084-4
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  • 3
    Online Resource
    Online Resource
    Springer Science and Business Media LLC ; 2021
    In:  The Journal of Chinese Sociology Vol. 8, No. 1 ( 2021-12)
    In: The Journal of Chinese Sociology, Springer Science and Business Media LLC, Vol. 8, No. 1 ( 2021-12)
    Abstract: Cognitive abilities have a great impact on individuals’ socioeconomic status. Among the factors that affect cognitive ability, early childhood development and preschool education are vital. However, evidence on the effect of preschool attendance on the urban-rural cognition gap from large-scale samples is almost nonexistent. Based on a nationally representative dataset from the China Education Panel Survey, this study fills this gap by presenting evidence of a significant cognition gap between urban and rural middle school students. We find a consistent positive relationship between preschool attendance and cognitive ability in grade 7 and grade 9 based on ordinary least squares and propensity score matching estimations. Results based on a Blinder-Oaxaca decomposition suggest that the differences between urban and rural students in preschool education account for 28% to 44% of the between-group cognition gap. We also simulate the effects of policy interventions meant to develop preschool education on the narrowing of the urban-rural cognition gap.
    Type of Medium: Online Resource
    ISSN: 2198-2635
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2021
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