微机自动控制动物饮食行为检测仪的研制

采用红外传感、减速马达和光电传感组合、压力传感、51系列单片微机控制和记忆等技术,研制一种检测动物饮食行为的仪器,用于药物和食品研制中的动物实验。经30例小鼠实验证明,效果良好,该仪器为测定动物饮食行为提供了一种全新的先进方法。     

数据记忆动物游泳测试仪的研制

目的研制一种用于检测动物负载游泳状况及过程的仪器,用于动物疲劳游泳试验。方法采用不同直径的可调换加载钢球、恒温水池、接近传感器信号转换、51系列单片微机控制和记忆信号。结果研制出一台可同时做六路平行实验的动物游泳测试仪,自动记忆动物在加载的情况下抗疲劳游泳的全过程。结论经36例小鼠实验证明,效果良好,该仪器为动物负载游泳实验提供了一种全新的测试方法。     

头部位移检测法动物悬尾实验仪的研制

采用红外传感、激光定位、51系列单片微机控制和记忆等技术,研制一种检测动物悬尾特性的仪器,用于药物研究中的动物悬尾实验。经30例小鼠实验证明,效果良好,该仪器为动物悬尾实验提供了一种全新的先进方法。     

人体手指容积描記法

容积描记法早在19世纪中叶就被用来研究肢体和某些脏器血管的机能状态。1846年贝顾(Piegu)首先创制了第一具人体上肢的容积描记器,后经不断改进,容积描记方法逐步趋向灵敏与完善。容积描记法的基本原理,是将人或动物身体的某一部分放入一密闭的容器中,观察在各种情况下血管舒缩状态在肢体容积变化上的反映;或在肢体根部施加一定的压力以阻塞其静脉回流,在不影响动脉血流的情况下,记录肢体容积的变化,从而来推测单位时间     

用于实验动物的旋转行为监测仪

目的研制一种用于检测动物实验中动物旋转行为的旋转行为监测仪。方法采用串口控件、USB技术和旋转编码器等现代计算机、控制技术,并与传统的动物实验测量方法相结合,并配备了自行开发的基于VC的软件系统。结果研制出一台可连续性监测小型动物旋转行为仪器,智能显示记录动物的旋转行为。结论通过对实验数据的统计学分析,验证了系统的合理性、有效性。由此方法研制的旋转行为监测仪可在研究帕金森氏疾病的发病机制,筛选抗帕金森氏疾病的药物等方面发挥重要作用。     

成都仪器厂生物信号采集与处理系统等产品简介

Rm6240B／C、Rm6280C、Rm62160C生理记录仪暨生物信号采集与处理系统是成都仪器厂研制的新一代医学实验设备,产品获得了医疗仪器准产注册证、计量器具生产许可证等有关证照,符合医疗仪器及药品监督管理的有关法规。隔离型产品既可用于人体实验也可用于动物实验。     

成都仪器厂生物信号采集与处理系统等产品简介

Rm6240B／C、Rm6280C、Bm62160C生理记录仪暨生物信号采集与处理系统是成都仪器厂研制的新一代医学实验设备,产品获得了医疗仪器准产注册证、计量器具生产许可证等有关证照,符合医疗仪器及药品监督管理的有关法规。隔离型产品既可用于人体实验也可用于动物实验。     

成都仪器厂生物信号采集与处理系统等产品简介

Rm6240B／C、Rm6280C、Rm62160C生理记录仪暨生物信号采集与处理系统是新一代医学实验设备,产品获得了医疗仪器准产注册证等有关证照,符合医疗仪器及药品监督管理的有关法规。隔离型产品既可用于人体实验也可用于动物实验。级联型产品可将4道或8道系统级联为8道或16道系统。     

成都仪器厂生物信号采集与处理系统等产品简介

Rm6240B／C、Rm6280C、Rm62160C生理记录仪暨生物信号采集与处理系统是新一代医学实验设备,产品获得了医疗仪器准产注册证等有关证照,符合医疗仪器及药品监督管理的有关法规。隔离型产品既可用于人体实验也可用于动物实验。级联型产品可将4道或8道系统级联为8道或16道系统。     

一种简便鉴定细菌、真菌的显微镜

最近,以色列Ben-Gurion大学应用生物科学研究所Erukhimovitch等介绍了一种傅立叶转换红外显微镜[Fourier-transform infrared（FTIR）microscopy]广泛而又敏感地测定细胞的分子转换而用于鉴定细菌、真菌。这种新型显微镜比通常已广泛应用的傅立叶转换红外光谱仪（FTIR spectroscopy）有明显优势,即后者只能测定一个样品的一定局限范围,而前者则可测定更广范围的标本,是更简便、快速且准确可信的鉴定细菌、真菌的新仪器,用于各种人类和动物感染细菌和真菌的鉴别。     

自记录动物挂杠持久度测试装置的研制

目的：研制一种检测动物挂杠持久度的实验装置,用于相关医药研究中的动物静态抗疲劳实验。方法采用51系列单片微机控制和记忆,光耦传感器、电磁水阀等组合控制电路和技术。结果成功研制出一种适用于医学及药学研究领域的带微机控制和自记忆功能的动物挂杠持久度实验装置,经28例小白鼠实验证明,效果良好。结论该实验装置为动物抗疲劳实验提供了一种全新的方法。     

A robust optical respiratory trigger for small rodents in clinical whole-body MR systems.

An increasing number of animal experiments are currently conducted on clinical MR systems. Motion artefacts due to breathing can become quite apparent, in particular with abdominal examinations. These artefacts can be reduced by using a triggered acquisition. However, the built-in detectors in human whole-body scanners are usually not sensitive enough to detect the tiny movements of small rodents. Therefore, a sensitive optical motion detector was developed together with a simple, robust analogue circuit. This circuit converts the original optical signal into an electrical one, compensates slow drifts and offsets, and finally generates a transistor-transistor logic trigger signal as input for the clinical whole-body magnetic resonance scanner. The trigger was successfully applied in mouse experiments.     

Intracellular osmotic gradient generation in rat ventricle myocyte by using a micro-perfusion system

This experimental study describes the fabrication and analysis of a micro-perfusion system that can be used in many bioengineering experiments to create rapid, large regional intracellular changes within single ventricular myocytes. The myocyte was a kind of osmometer since the cell volume was found to be strongly dependent on the perfusion solution osmolarity. This volume change was measured, indirectly, by measuring the cell width change using video-microscopy and image analysis software. Jacob's equation was used to model these results successfully. Some dual perfusion experiments to see the effects of the localized perfusion of different osmotic solutions to generate an osmotic gradient inside myocytes were also investigated. This device can be useful for studying the effects of localized pH or osmotic gradients inside myocytes, estimating intracellular ion diffusion rates, and inducing regional changes in other important intracellular ions.     

Intracellular osmotic gradient generation in rat ventricle myocyte by using a micro-perfusion system

This experimental study describes the fabrication and analysis of a micro-perfusion system that can be used in many bioengineering experiments to create rapid, large regional intracellular changes within single ventricular myocytes. The myocyte was a kind of osmometer since the cell volume was found to be strongly dependent on the perfusion solution osmolarity. This volume change was measured, indirectly, by measuring the cell width change using video-microscopy and image analysis software. Jacob's equation was used to model these results successfully. Some dual perfusion experiments to see the effects of the localized perfusion of different osmotic solutions to generate an osmotic gradient inside myocytes were also investigated. This device can be useful for studying the effects of localized pH or osmotic gradients inside myocytes, estimating intracellular ion diffusion rates, and inducing regional changes in other important intracellular ions.     

时间分辨荧光免疫分析仪的临床实验方法和评价方案

时间分辨荧光免疫分析技术是一种利用稀土离子及其螯合物作为示踪剂的灵敏度高、线性范围宽、应用范围广的非放射性标记免疫分析技术。研制了一种性能稳定的时间分辨荧光免疫分析仪,为了进一步将这一先进超微量物质检验技术推广于临床应用,根据美国国家临床实验室标准化委员会（NCCLS）制订的临床评价方案,选择放射免疫分析法、化学发光免疫分析法以及Perkin Eimer Life Sciences公司的Auto DFLFIA-1235全自动时间分辨荧光免疫分析仪作为比较方法,提出了三套检验时间分辨荧光免疫分析仪性能的临床实验方法和评价方案。并利用其中的一套方案进行了实验,结果表明这些方案可操作性强,结果可信,经济适用,可作为同类医疗检验仪器进行临床实验的参考。     

Development and evaluation of a loop‐mediated isothermal amplification assay for rapid detection of chicken anaemia virus

Aim: Chicken anaemia virus (CAV) causes an economically important viral disease in chickens worldwide. The main aim of this study was to establish a rapid, sensitive and specific loop‐mediated isothermal amplification (LAMP) assay for detecting CAV infection. Methods and Results: A set of four specific LAMP primers were designed based on the nucleotide sequence of the CAV VP2 gene, which encodes a nonstructural protein. These were used for the amplification of a specific target region of the VP2 gene. LAMP amplicons were successfully amplified and detected by DNA electrophoresis and by direct naked eye SYBR Green I visualization. A sensitivity test systematically demonstrated that the LAMP assay was superior to a conventional PCR assay with a minimum concentration limit of 100 fg compared to 10 ng for the conventional PCR. The specificity of the LAMP assay for CAV detection is consistent with conventional PCR. Using this established LAMP assay, infected and uninfected clinical samples obtained from an experimental farm were fully verified. Conclusions: A novel nucleic acid‐based approach of LAMP assay was successfully developed for detecting CAV infection. Significance and Impact of the Study: In this study, these results indicate that the developed LAMP assay herein for CAV detection is a time‐effective, simple, sensitive and specific test that can be used as an alternative approach in the future for large‐scaled diagnosis on the farm of CAV infection.     

Visual documentation of ovine pituitary gland development with magnetic resonance imaging following zeranol treatment

The objective of the current study was to determine whether magnetic resonance imaging (MRI) could be successfully utilized to document the effect of an oestrogenic anabolic agent on pituitary gland growth. The experimental animals consisted of two 1/2 sibling Suffolk wethers (castrated rams), which received either no implant (control, n = 1) or a 24 mg zeranol implant at day 0 and day 42 (zeranol; n = 1). Animals were anaesthetized with propofol and supported with oxygen during the MRI procedure. A mobile MRI unit with a 0.5 tesla (T), superconducting magnet was used to obtain 3 mm thick, non-contrast enhanced, T1-weighted (TR 500-600, TE25) sagittal, transverse and dorsal images of the pituitary gland. Sagittal images were recorded only when the mesencephalic aqueduct and infundibulum were distinctly visible in the same image. Pituitary glands were imaged at 14-day intervals for 70 days to determine if and when the anabolic effects of zeranol on pituitary gland growth could be visualized using MRI techniques. Three separate measurements of the pituitary gland dimensions made with the on-screen cursor were averaged to calculate pituitary gland dimensions and volume. A computer-assisted image analysis system and laser film images were used to determine pituitary gland area. Increases in pituitary gland volume for control and zeranol-treated animals were evident within 14 days, and by the end of the 70-day study, the increase in pituitary volume for the zeranol-treated animal was three times greater than that of the control animal. Overall, our results indicate that MRI technology can be successfully used to document the development of the pituitary gland in vivo. Application of knowledge gained from this novel approach to study the growth, development and function of endocrine glands over time, and within the same animal, will enhance human and animal endocrine diagnostic procedures.