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Effects of Individuals and Behaviors on Acoustic Features of Ultrasonic Vocalizations in Rats
Ultrasonic Vocalization Acoustic Feature Rat Individual Behavior
2016/5/4
The goal of this study was to investigate how spectrographic features of ultrasonic vocalizations (USVs) in rats vary among individuals and behaviors. Eighteen pairs of rats were allocated to individu...
醇法菜籽浓缩蛋白的超声波改性研究（Ultrasonic Modification of Alcohol Leached Rapeseed Protein Concentrate）
醇法菜籽浓缩蛋白 NSI 超声波 改性
2009/9/25
研究了对醇变性菜籽浓缩蛋白(RPC)进行超声波改性的方法。在单因素试验的基础上，采用L9(3)4正交优化试验，以探讨pH值、改性时间、超声波功率和菜籽浓缩蛋白质量分数对菜籽浓缩蛋白的氮溶解指数(NSI)的影响并与微波改性菜籽浓缩蛋白的理化指标和功能性质进行分析比较。通过正交试验确定了超声波改性的最佳工艺条件为：菜籽浓缩蛋白质量分数3%、改性时间5min、超声波功率300W、pH值为11。在最佳改性...
为了降低苹果汁中展青霉素的含量，提高苹果汁的安全性，研究了超声波处理技术对苹果汁中展青霉素的降解效果及条件。在单因素试验的基础上，通过正交试验确定了超声波处理技术降解苹果汁中展青霉素的较佳工艺条件。结果表明：超声波降解苹果汁中展青霉素的最佳工艺参数为超声波功率420W、处理时间90min、超声波频率28kHz、处理温度30℃，在该条件下苹果汁中展青霉素降解率为69.43%，试验对苹果汁的关键质量参...
青钱柳叶总黄酮超声辅助提取工艺优化（Technology Optimization of Total Flavonoids Extraction from Cyclocarya Paliurus Leaves by Ultrasonic Assistance）
青钱柳叶 总黄酮 超声
2009/5/22
为研究以乙醇为溶剂超声波辅助提取青钱柳叶总黄酮的工艺，在单因素试验的基础上，采用四因素二次回归正交旋转组合设计，以液料比、超声处理时间、超声功率、溶剂体积分数为考察因素，优选了超声波辅助提取青钱柳叶总黄酮的最佳工艺。结果表明各因素对提取率的影响大小依次为：超声处理时间、溶剂体积分数、液料比、超声功率。最佳工艺条件为液料比55mL/g，超声处理时间34min，超声功率720W，溶剂体积分数60%，在...
Efficiency of ultrasonic Vertex III hypsometer compared to the most commonly used hypsometers in Croatian forestry
tree height hypsometers height measurement time study variance analysis
2009/2/7
The article investigates the efficiency of the ultrasonic Vertex hypsometer in tree height measurements in relation to some of the most commonly used hypsometers in Croatian forestry. The whole meas...
Characterisation of soil aggregate stability by ultrasonic dispersion
ultrasonic dispersion soil aggregate stability soil particle dispersion
2008/11/24
Ultrasonic soil aggregate stability (USAS) of 5 European soils was investigated in ultrasonic dispersion tests, studying mass fractions of macroaggregates at different absorbed specific energy levels....
Influence of vibration amplitude on the ultrasonic dispersion of soils
ultrasonic dispersion soil aggregates ultraso- nic energy vibration amplitude particle size distribution
2008/11/18
Ultrasonic dispersion is a powerful method of dispersing soil aggregates. Several procedures are described in the literature, which use absorbed ultrasonic energy as the main parameter for correlation...
Predicting Parturition Time through Ultrasonic Measurement of Posture Changing Rate in Crated Landrace Sows
Sows Parturition Ultrasound Postures Basic Parturition Threshold Value (BPTV)
2016/4/25
This study presents an automatic system to predict parturition time in the crated sows. The system relies on ultrasonic transducers mounted from above along the length of the crate. Using a 40 kHz tim...
Quantification of Pre-parturition Restlessness in Crated Sows Using Ultrasonic Measurement
Sows Parturition Ultrasonic Transducers Animal Husbandry
2016/4/19
This study presents a non-video, non-invasive, automatic, on-site monitoring system the system employs ultrasonic transducers to detect behavior in sows before, during and after parturition. An ultras...