ABSTRACT
Plant virus is one of the most economical devastating microorganisms for global agriculture. Although several strategies are useful for controlling viral infection, such as resistant breeds cultivation, chemical bactericides treatment, blocking the infection source, tissue detoxification and field sanitation, viral disease is still a problem in agricultural production. Genetic engineering approach offers various options for introducing virus resistance into crop plants. This paper reviews the current strategies of developing virus resistant transgenic plants.
Subject(s)
Agriculture , Crops, Agricultural , Genetics , Virology , Genetic Engineering , Plant Diseases , Virology , Plant Viruses , Plants, Genetically Modified , VirologyABSTRACT
This paper introduces a kind of clinical thermometer, which can be wor n on the breast, leg and other parts of the body. It can acquire the temperature data through a large-capacity data memory and the data can be processed by the computer.
ABSTRACT
This paper presents to you the principles, composition, features and applications of ET-100 measuring-training device for eustachian tube opening function.
Subject(s)
Humans , Computers , Deglutition , Physiology , Equipment Design , Eustachian Tube , Physiology , Otolaryngology , Signal Processing, Computer-Assisted , Software , SoundABSTRACT
With the computer technology, hardware circuit design and software programming applied, a multimedia simulating body for acupuncture teaching and training is developed in this paper.
ABSTRACT
In order to study the effect of chronic noise exposure on auditory center, seven guinea pigs were .exposured to 105 dB A noise 8h daily for 45 d. Then the animals were killed by decapitation. The superior olive and inferior colliculus were taken immediately to make the samples of electron microscope. The mitochondria swelling, membrane rupture, cristae breaking, ballooning degeneration were found. The rough surfaced endoplasmic reticulum was swollen and expanded. The lysosome and secondary lysosome were increased. The cell interstitial edema and synaptic besicle decrease were observed. The nuclear chromatid was decreased and nucleolus was kept to the side. The laminae of neurilemma of nerve fibers were dissociated, swollen and broken. The results indicate that the ultrastructure, neural cells and fibers in the auditory center are damaged by chronic noise exposure and most of these damages are irreversible.