匿名使用者
匿名使用者 發問時間: 社會與文化語言 · 7 年前

請幫忙英翻中,因為時間緊迫,求助知識+

Total porosity (Π) was measured and is listed in Table 2. A gravimetry [9] was used and calculated

Π according to equation [10]

Π= 1−ρscaffold⁄ρmaterial (2)

where ρmaterial is the density of the material of which the scaffold is fabricated and ρscaffold is the apparent density of the scaffold measured by dividing the weight by the volume of the scaffold. Note that the viscosity of EC5900E is low, resulting in a wider flat strand. In addition, cracks occur easily during solidification. Therefore, it is unable to form pores. The porosity of successful fabricated scaffolds ranges from 79 to 84 % as list in Table 2. Although the mean pore size of the scaffold made of EC5900EHA is larger than 300 μm, EC5900E failed to fabricate a scaffold. Therefore, there is no control group for comparing the effect of adding HA in the biopolymer on cell viability. Therefore, scaffolds made of EC23900E and EC23900EHA were used as control and experiment group to carry out the in vitro cell culturing, respectively. Since the mechanical property is also a key determinant factor of scaffold performance, the compressive strength was measured and is listed in Table 2. The result shows that the compressive strength of the scaffold made of EC23900EHA is 18.38 MPa, which is twice the magnitude of the scaffold made of EC23900E. For human trabecular bone, the maximum compressive strength of femoral head is 9.3 ± 4.5 MPa [11]. This reveals that both scaffolds are suitable for mimicking the trabecular bone of femoral head. Furthermore, it should be noted that despite having porous structure, the fabricated scaffolds possess adequate compressive strength required for bone tissue restoration, but we suggest that scaffolds made of EC23900E be used in low weight-bearing bone sites.

4 個解答

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  • WTO
    Lv 5
    7 年前
    最佳解答

    總孔隙率(Π)經測定,並列在表2。使用一個重量測定器[9],並計算。

    Π根據方程式[10]

    Π=1-ρ支架/ρ材料(2)

    其中ρmaterial(材料)是其中製造支架材料的密度,而ρscaffold(支架)是支架的外表密度,由其重量除以測定的外觀體積而得。請注意,EC5900E的粘度低,致使形成較寬扁股條。此外,在凝固過程中容易出現裂縫。因此,它無法形成孔隙。由成功製造的支架的孔隙率,其範圍從79%至84%,如列出在表2中。雖然由EC5900EHA製成的的支架的平均孔徑大於300μm,EC5900E未能製造出支架。因此,沒有對照組,以比較添加HA在細胞活力的生物聚合物中的效果。因此,用EC23900E和EC23900EHA製成的支架的被用來作為控制組和實驗組,進行體外細胞培養,各別地。由於機械性能對支架的操作性也是一個重要的決定因素性,其壓縮強度被測定,並列在表2中。結果表明,抗壓強度用EC23900EHA製成的支架是18.38 MPa,這是由EC23900E製成的支架的兩倍數值。對於人骨小梁,股骨頭的最大壓縮強度是9.3±4.5MPa[11]。這顯示,這兩種支架適合模仿股骨頭骨小梁。此外,應當指出,儘管具有多孔性結構,此種人造支架具有骨組織修復所需的足夠的抗壓強度,但我們建議使用由EC23900E製成的支架在低負重骨部位。

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  • 7 年前

    ρ 念rho

    是希臘字母

    ρ material不應該連在一起的

    2012-09-29 10:55:34 補充:

    Π 念 pi

    也是希臘字母

    在數學裡是圓周率

    在這裡應該不是

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  • 7 年前

    總孔隙率(Π)的測定,並在表2中列出。一個重量法[9],使用和計算方法

    Π根據式[10]

    Π=1-ρscaffold/ρmaterial(2)

    其中ρmaterial是其中棚架的製造和ρscaffold是由棚架的體積的重量除以測定的表觀密度的支架材料的密度。請注意,EC5900E粘度低,從而在更寬的扁平鏈。此外,在凝固過程中容易出現裂縫。因此,它是無法形成孔隙。成功的材料的孔隙率的範圍從79%至84%作為表2中的列表中。雖然製成的EC5900EHA腳手架的平均孔徑大於300μm,EC5900E未能製作一個支架。因此,存在沒有對照組,添加HA對細胞活力的生物聚合物中的效果進行比較。因此,腳手架的EC23900E和EC23900EHA的被用來作為控制組和實驗組,進行體外細胞培養,分別。由於機械屬性腳手架性能也是一個重要的決定因素,壓縮強度的測定,並在表2中列出。結果表明,抗壓強度棚架製成的EC23900EHA是18.38 MPa時,這是兩倍的大小製成的EC23900E腳手架。對於人骨小梁,股骨頭的最大壓縮強度是9.3±4.5兆帕[11]。這表明,這兩種支架適合模仿股骨頭骨小梁。此外,應當指出,儘管具有多孔性結構,材料具有骨組織修復所需的足夠的抗壓強度,但我們建議在低負重骨網站使用支架製成的EC23900E。

    參考資料: google
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  • Hsiang
    Lv 5
    7 年前

    專業的東西只有專業的人能懂吧@@

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