杜仲树皮生长理论及剥皮再生技术

介绍杜仲树皮次生生长过程及大面积剥皮再生新皮的起源、形成过程和树体生理反应。探讨影响仁仲剥皮再生的环境因子和加速剥皮再生，提高成海活率的主要技术措施。     

冷再生技术在高等级公路中的应用

通过试验，分析冷再生料的物理特性及施工中的材料级配问题，阐述冷再生技术的基本原理，介绍冷再生技术在高等级公路中的应用。     

CO2吸附剂掺钾锆酸锂的制备及其性能表征

采用柠檬酸-乙二醇络合法，以硝酸锂、硝酸氧锆、硝酸钾为原料制备了掺钾Li2ZrO3超细晶体粉末，采用TG-DSC、XRD、SEM等手段对掺钾Li2ZrO3的前驱体及掺钾Li2ZrO3晶体粉末进行了表征，分析了凝胶的热分解变化过程和四方晶形结构的形成过程。结果表明：在800℃下焙烧150 min，制备出的掺钾Li2ZrO3超细晶体粉末为四方晶型，晶型完整、均匀。采用TG-DSC对掺钾Li2ZrO3晶体粉末在程序升温和高温恒温状态下吸附CO2的性能进行了研究。最佳吸附温度为500 ℃，90 min样品吸附CO2量可达吸附剂质量的29.5%。     

野大麦耐盐变异体的筛选和植株再生

以野大麦的成熟胚为外植体诱国组织，选取淡黄色，易碎的胚佃组织为材料，进行细胞悬浮培养。     

逆流太阳能溶液集热/再生器再生效率实验分析

对1 m×2 m×0.35 m逆流太阳能溶液集热/再生器进行实验研究,分析了影响太阳能溶液集热/再生器再生效率的各种影响因素.实验研究发现,常温溶液再生存在明显两段式分布,溶液再生效率随空气流量的增加先增后减,存在最大值;溶液再生效率随溶液流量增加而递减.加热溶液综合再生效率升高;而加热再生用空气其综合再生效率下降.采用含湿量为20 g/kg再生用湿空气的再生效率比用含湿量为10 g/kg的再生用湿空气的再生效率小0.16.随着太阳辐射强度的提高,溶液再生效率也相应增加.因此,逆流太阳能溶液集热/再生器应在空气较干燥、太阳辐射强度较高时运行,并选取适合的空气流量.     

活性炭吸附分离去除腈纶溶剂循环系统中铁离子工艺研究

在建立腈纶溶剂中铁含量分析方法的基础上,选择不同种类和结构的国产活性碳样品,用静态吸附法初步评价对其铁离子的选择性吸附能力,然后采用固定床动态吸附法测定铁组分的穿透曲线,评价其动态吸附能力的大小,从而决定最佳的活性碳,最后讨论了动态脱附条件对活性碳柱再生程度的影响。     

一类具有时滞的SIR传染病模型的稳定性与Hopf分支

本文研究了一类具有非线性发生率和恢复率的修正的SIR模型,考虑了疾病的潜伏期作为时滞因素,首先得到了模型的基本再生数R₀,然后运用时滞微分方程的稳定性和分支理论,分析了模型无病平衡点和地方病平衡点的稳定性,得到了在地方病平衡点Hopf分支存在的条件,最后用MATLAB数值模拟验证结果。     

大鼠再生肝8种细胞的PPARγ信号通路相关基因转录谱预示脂类代谢活动

为了解大鼠肝再生中肝细胞、胆管上皮细胞、卵圆细胞、星形细胞、窦内皮细胞、库普弗细胞、陷窝细胞、树突状细胞等8种肝脏细胞的PPARγ信号通路相关基因转录谱及其预示的脂类代谢活动,按本卷2期张丽君[1]等方法分离大鼠再生肝8种细胞,检测它们的PPARγ信号通路基因表达谱,分析其预示的生理活动.结果表明,41个PPARγ信号通路相关基因在大鼠肝再生中发生了有意义的表达变化,其中上调、下调和上/下调的基因为9、9、23个,呈现15种表达相关性.相应细胞的基因数为10、6和1,10、12和2,7、7和0,16、8和3,18、7和1,10、6和1,11、20和0,13、9和4.它们的转录谱预示,胆管上皮细胞和星形细胞的脂肪合成、星形细胞和树突状细胞的胆固醇代谢、8种肝脏细胞的脂肪酸运输和脂肪细胞分化、星形细胞、窦内皮细胞和树突状细胞的脂肪酸氧化和糖异生、胆管上皮细胞和树突状细胞的能量代谢增强.上述结果表明,PPARγ信号通路与大鼠肝再生密切相关.     

Biological and mechanical investigation of novel flax/silk protein-based nanofibrous scaffold for bone regeneration

The process of bone tissue regeneration involves an intricate network of a biological macromolecules that includes proteins and peptides to support stimulation and healing response. Here, we have fabricated a novel flaxseed/silk fibroin based (dual protein) composite nanofibers using β-TCP to improve the biological properties and promote cartilage tissue regeneration along with a controllable rate of biodegradation. The physiochemical properties of PVA/β-TCP/FP:SF were characterized by FTIR, XRD, SEM, porosity, contact angle measurements and mechanical evaluation etc. This study demonstrates the biological performance of the developed nanofibers by using hemocompatibility, biodegradation ability, and apatite deposition in stimulated body fluid. Moreover, the cell viability assay was performed on MG-63 osteoblast cells and long-term antibacterial rate against E. coli and S. aureus was analysed. Docking results of flax protein and silk fibroin protein further confirmed the stable modes of intramolecular bonding and the most stable electrostatic values using theoretical calculations. Taken together, the experimental results proved that the dual protein-based fibrous scaffold was found to be up-regulated in terms of biological activity with enhanced cell adhesion and proliferation.     

Neuronal plasticity and regeneration in the olfactory system of mammals: morphological and functional recovery following olfactory bulb deafferentation

The mammalian olfactory system has the unique property in the permanent turnover of the olfactory sensory neurons under normal conditions and following injury. This implies that the topographical map of the epithelium-to-bulb connections generated during ontogenesis has to be maintained despite neuron renewal in order to insure olfactory information processing. One way to investigate this issue has been to disrupt the peripheral connections and analyze how neural connections may be reestablished as well as how animals may perform in olfactory-mediated tasks. This review surveys the main data pertaining to both morphological and functional recoveries taking place in the peripheral olfactory system following olfactory bulb deafferentation. Conclusions from these studies are enlightened by recent data from molecular biology.