Gravitaxis screened for physical mechanism using g-modulated cellular orientational behaviour [0.03%]
利用加速度调节的细胞取向行为筛选重力导向的物理机制
H Machemer,R Braucker
H Machemer
Advanced methods of recording cellular orientation with respect to the gravity vector are yielding increasingly wellfounded data on gravitaxis. The present study introduces a quantitative method which allows us to predict the precision of o...
The Free Fall Machine--a ground-based facility for microgravity research in life sciences [0.03%]
生命科学地面微重力研究设施“自由落体机”
D A Mesland,A H Anton,H Willemsen et al.
D A Mesland et al.
A device is described in which a biological specimen is periodically accelerated for a short period. Each event is followed by a variable period of free fall. Assuming that the g-dose (expressed g s) has to surpass a certain minimal value t...
Neural-network-based classification of Space Acceleration Measurement Systems (SAMS) data via supervised learning [0.03%]
基于神经网络的监督学习空间加速度测量系统(SAMS)数据分类方法
A Smith,A Sinha,C M Grodsinsky
A Smith
This paper illustrates the applicability of neural networks in classifying events using Space Acceleration Measurement System (SAMS) data. Computer programs have been written in the MATLAB environment for the following purposes: automatic r...
Enhancing effects of simulated microgravity on Agrobacterium-infected frequency of tobacco callus [0.03%]
模拟微重力增强根癌土壤杆菌感染烟草愈伤组织效应的研究
L Y Dong,Liu ChX,J N Shi
L Y Dong
Under the condition of rotation-induced gravity compensation, the time course of interaction between Agrobacteriun tumefaciens and tobacco callus was investigated by means of a scanning electronic microscope. Resulted from repeated experime...
Temperature prediction of space flight experiments by computer thermal analysis [0.03%]
计算机热分析在空间飞行试验温度预测中的应用研究
M B Birdsong,M W Luttges
M B Birdsong
Life sciences experiments are especially sensitive to temperature. A small temperature difference between otherwise identical samples can cause various differences in biological reaction rates. Knowledge of experimental temperatures and tem...
G Sonnenfeld,D A Koebel,S Davis
G Sonnenfeld
The purpose of this study was to compare the effects of hypergravity exposure (2g) with those of exposure to space flight in the Cosmos 2044 flight. To do so, rats were centrifuged continuously for 14 days. Two different experiments were ca...
Comparative Study
Microgravity science and technology. 1995 Feb;7(4):323-6. DOI: 1995
K H Hasenstein
K H Hasenstein
The movement of growing primary roots of maize was measured using a computer driven video-digitizer system. Real time measurements with two perpendicularly mounted video cameras permit measurements of growth movements in three dimensions an...