Control of epileptic activities in a cortex network of multiple coupled neural populations under electromagnetic induction

Epilepsy is believed to be associated with the abnormal synchronous neuronal activity in the brain,which results from large groups or circuits of neurons.In this paper,we choose to focus on the temporal lobe epilepsy,and establish a cortex network of multiple coupled neural populations to explore the epileptic activities under electromagnetic induction.We demonstrate that the epileptic activities can be controlled and modulated by electromagnetic induction and coupling among regions.In certain regions,these two types of control are observed to show exactly reverse effects.The results show that the strong electromagnetic induction is conducive to eliminating the epileptic seizures.The coupling among regions has a conduction effect that the previous normal background activity of the region gives way to the epileptic discharge,owing to coupling with spike wave discharge regions.Overall,these results highlight the role of electromagnetic induction and coupling among the regions in controlling and modulating epileptic activities,and might provide novel insights into the treatments of epilepsy.

Polyploidy Induction of Pteroceltis tatarinowii Maxim.

[Objective] This study was conducted to obtain tetraploid Pteroceltis tatarinowii Maxim. with excellent ornamental traits. [Method] The stem apex growing points of Pteroceltis tatarinowii Maxim. were treated with different concentrations of colchicine solution for different hours to figure out a proper method and obtain polyploids. [Result] The most effective induction was obtained by treatment with 0.6%-0.8% colchicine for 72 h with 34.2% mutation rate. Flow cytometry and chromosome observation of the stem apex growing point of P. tatarinowii Maxim. proved that the tetraploid plants were successfully obtained with chromosome number 2n =4x =36.[Conclusion] The result not only fills the blank of polyploid breeding of P. tatarinowii,but also provides an effective way to broaden the methods of cultivation of fastgrowing, high-quality, disease-resilience, new varieties of Pteroceltis.

Preliminary Research on Radiation Breeding of Pteroceltis tatarinowii Maxim.

In order to explore the effect of radiation breeding on new germplasm innovation of Pteroceltis tatarinowii,the dry seeds of P.tatarinowii from Lingyan Temple were used as test materials in this study,which were irradiated by ^(60)Co-γ rays with different radiation doses.The results showed that the emergence rate decreased with the increase of radiation dose,the emergence rate of low dose below 200 Gy decreased slowly,and the emergence rate of high dose above 200 Gy decreased sharply;when the radiation dose ranged from 100 to 200 Gy,the mutagenic effect of P.tatarinowii seeds was the best;and radiation obviously affected the leaf color and leaf shape of seedlings.This study provides original materials for the cultivation of new P.tatarinowii varieties and the study of color-changing mechanism.

Oil Content and Nervonic Acid Content of Acer truncatum Seeds from 14 Regions in China

Acer truncatum is considered a promising species as a raw material to produce nervonic acid(NA). The goal of this study was to explore the variation of oil content and nervonic acid content of 138 accessions native to 14 regions in China as well as provide guidance for establishing plantations and improving the production of nervonic acid. A large range of variation was found in oil content, nervonic acid per gram of oil, and nervonic acid per gram of seed(17.81%–36.56%, 3.90%–7.85%, and 0.84%–2.31%, respectively). Accessions YS-6, ABZ-6 and DQTL-8 were found as the most promising potential oil sources; PQ-2 was considered the optimal germplasm, and JY-6, NJ-8, LF-6, and CC-8 were found as promising potential sources for producing NA. A very significant difference(P < 0.01) among 14 regions was observed. DQTL and YS regions are considered the optimal farming regions for crops with high oil content, while the CC and PQ regions are regarded as the most suitable regions for nervonic acid production. A geographical trend from South to North was observed in which amount of seed oil increased but no such trend in nervonic acid content was observed. The data collected in the study on oil content and nervonic acid in accessions of A. truncatum in various regions can be utilized for establishing plantations of promising genotypes through clonal means.