نتایج جستجو برای: mature fields
تعداد نتایج: 312569 فیلتر نتایج به سال:
In 2002, a survey carried out in rice paddies the Rio Grande do Sul (RS) state reported occurrence of nine species jointvetch (Aeschynomene). Due to their semi-aquatic habit, some adapted irrigated fields, which led being considered worst broadleaf weed RS. Although farmers have successfully implemented management practices, Aeschynomene plants reportedly escaped chemical control. This study ai...
The earliest stages of Alzheimer's disease (AD) are characterized by the formation of mature tangles in the entorhinal cortex and disorientation and confusion when navigating familiar places. The medial entorhinal cortex (MEC) contains specialized neurons called grid cells that form part of the spatial navigation system. Here we show in a transgenic mouse model expressing mutant human tau predo...
The preceding chapters in this book have provided a comprehensive study of our present knowledge of comets, from the interstellar medium, through formation of the solar system and the present day, to the death of comets. This chapter will make no attempt to summarize the previous chapters. Rather, based on the material in the previous chapters, this chapter will ask about the high-level state o...
Cortical synaptic circuitry develops rapidly in the second postnatal week, simultaneous with experience-dependent turnover of dendritic spines. To relate the emergence of sensory maps to synaptogenesis, we recorded synaptic potentials evoked by whisker deflection in layer 2/3 neurons from postnatal day (P) 12 to 20. At P12, synaptic responses were undetectable. Only 2 days later in life (P14), ...
This paper has shed light on the processes of technological diversification and specialization by firms. European, American and Japanese firms have been examined in 25 technological fields within telecommunications, information and audiovisual technologies for the period 1978-1998. In general, in electronics technologies incumbent firms are engaged in continuous processes of technological diver...
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