This paper introduces a high performance sine wave current source (SSCS) based on DDS chip AD9833.
本文设计了一种基于DDS芯片AD9833的高性能正弦扫频式恒流源。
The purpose of the SSCS is to convey narrow-band calls consisting of voice, voiceband data, or circuit mode data.
SSCS的目的在于传递由语音、语音带宽数据或电路模式数据构成的窄带呼叫。
Objective: To investigate the culture methods of rabbit spermatogonial stem cells (SSCs) and their biological characteristics in vitro.
目的：建立精原干细胞的培养方法并对培养细胞的生物学特征进行研究。
Objective: to construct cell model of spermatogonial stem cells (SSCs) with Sertoli cell layer in vitro, and study the proliferation characteristic of SSCs in vitro.
目的：建立体外研究精原干细胞与支持细胞共培养的细胞模型，探讨体外精原干细胞在支持细胞层上的增殖特点。
The cultivation of SSCs may provide an ideal cell model for the research of committed stem cells' development and differentiation, which can be applied in remedial transplantation.
精原干细胞的成功培养为今后重建完整的生精细胞系的治疗性移植和对这类定向干细胞的发育及分化潜能的研究提供了细胞模型。
The cultivation of SSCs may provide an ideal cell model for the research of committed stem cells' development and differentiation, which can be applied in remedial transplantation.
精原干细胞的成功培养为今后重建完整的生精细胞系的治疗性移植和对这类定向干细胞的发育及分化潜能的研究提供了细胞模型。
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