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當(dāng)前位置:上海桑戈生物科技有限公司>>德國(guó)IWN換向閥>>鉆石刀(DIATOME)>> 30-ULTSON超聲波振動(dòng)鉆石刀
超聲波振動(dòng)鉆石刀Ultra Sonic Oscillating Diamond Knife
超聲波振動(dòng)鉆石刀是室溫超薄切片的蕞選擇,也是近些年來(lái)DiATOME與Dr Daniel Studer,(Lab. of Anatomy, University of Berne)合作的結(jié)晶。超聲波振動(dòng)切片是以超聲頻振動(dòng)激勵(lì)鉆石刀以幫助改善切片性能方法,這種切片方法的研究,近年在美、日、蘇、西德、英等國(guó)取得較大進(jìn)展并逐漸得到應(yīng)用。其具有減少切力、提高加工精度、提高表面光潔度和表面質(zhì)量、延長(zhǎng)刀具壽命等優(yōu)點(diǎn)。Ultra Sonic Oscillating Diamond Knife鉆石刀*解決了切片過(guò)程中的“樣本壓縮”問(wèn)題,是切片技術(shù)領(lǐng)域革命性的創(chuàng)新。通常在切片過(guò)程中產(chǎn)生“樣本壓縮”的原因在于:
進(jìn)刀的角度
樣品的硬度
鉆石表面和樣品表面的相互作用
切片的厚度
鉆石刀以固定的頻率和振幅來(lái)回運(yùn)動(dòng),振蕩的方向要平行于刀鋒。在室溫下超聲振蕩鉆石刀制備的樣品幾乎*消除了壓縮的想象,讓使用者可以得到更薄,質(zhì)量更好的切片。
我們已經(jīng)進(jìn)行以下包埋樣品的測(cè)試,其結(jié)果都非常理想:
生物學(xué)樣品in Epon, Araldite, EM Bed, etc
生物學(xué)樣品in acrylic resins (Lowicryls, LR White)
硬的聚合材料PS, PMMA, ABS, HIPS, modified PP, etc
該款鉆石刀的參數(shù):
35º
刀鋒長(zhǎng)3.0mm
切片厚度10-80nm
控制機(jī)單元 Control Unit
頻率25-45kHz,或者自動(dòng)共振裝置
振幅可變(電壓0-30V)
機(jī)器電壓230V,110V
貨號(hào) | 品名 | 角度 | 長(zhǎng)度 |
30-ULTSON | UltraSonic Knife and Control Unit | 35° | 3.0mm |
30-ULTSONK | UltraSonic Knife | 35° | 3.0mm |
一些使用的參考文獻(xiàn):
A. Al-Amoudi, J.Dubochet, H. Gnaegi, W. Lüthi, D.Studer: An oscillating cryo-knife reduces cuttinginduced deformation of vitreous ultrathin sections. Journal of Microscopy, Vol. 212, Pt 1, pp. 26-33, 2003.
D. Studer and H. Gnägi: Minimal compression of ultrathin sections with use of an oscillating diamond knife. Journal of Microscopy, Vol. 197, Pt 1, pp. 94-100, 2000.
J.S. Vastenhout and H.Gnaegi: Ultramicrotomy of polymers using an oscillating knife; improving polymer morphology. Microscopy and Microanalysis. 8 (Suppl. 2) 2002
使用此款鉆石刀得到的杰出作品展示如下:
Peripheral nerve (rat)
Peripheral nerv (rat), HP frozen, freeze substituted, Epon embedded, cut with the ultra sonic knife, section thickness 50nm. W. Graber, Institut of Anatomy, University of Bern, Switzerland
ABS, stained with OsO4, sectioned at room temperature with the ultra sonic knife, section thickness 50nm. Note the almost perfect spherical shape of the large rubber particles and the preservation of the inclusions inside. Also the smaller dense rubber particles are well preserved. B.Vastenhout, Dow Benelux N.V. Terneuzen, The Netherlands.
Heart (rat) |
Heart (rat), fixed with 2.5% Glutaraldehyde, OsO4 stained, Spurr's embedded, cut with the ultra sonic knife, section thickness setting 15nm. J. Nebesarova, Institut of Parasitology, Ceske Budejovice, Czech Republic. Imaged by Petr Stepan in LVEM 5 at 5kV, Delong Instruments, Brno, Czech Republic.
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