Understanding the spatial polarization pattern of technology transfer network in the Guangdong–Hong Kong–Macao Greater Bay area

Technology transfer is a conscious knowledge transfer and diffusion, which can promote the coordinated configuration and balanced development of technological innovation elements in geographical space. From the perspective of “space of flow”, the technology transfer network is constructed. Utilizing patent technology transaction data from 2018, this study analyzes the agglomeration differentiation and spatial polarization patterns of technology transfer from network nodes, network layers, and network partition in Guangdong–Hong Kong–Macao Greater Bay Area. The conclusions are as follows: (1) The agglomeration of technology transfer is remarkable in the network, showing “two poles and two strong” as well as proximity advantages; Shenzhen and Guangzhou have become spatial poles within the network. (2) The Matthew effect is prominent and technology transfer at the spatial level is largely caused by core node interactions, while core-edge hierarchical transmission mechanisms and geographical proximity contact characteristics are gradually developing. (3) Differences in roles between the plates are pronounced, and there is an agglomeration effect within a plate and between plates, as well as clear spillover effects.     

传统平房仓技术改造双低储粮试验

通过在传统平房仓实施保温、密闭和制冷技术改造的同时,对仓内存储的成品粮实施绿色低氧保管。解决了成品粮易变质、难度夏的保管难题,确保储粮安全。     

利用RNA干扰技术研究长牡蛎TLR2-2基因对MyD88-2基因表达的影响

为研究长牡蛎(Crassostrea gigas)免疫基因TLR2-2对MyD88-2基因表达的调控作用,将体外合成的dsRNA注射进入成体长牡蛎体内,72 h后检测TLR2-2基因和MyD88-2基因的表达量。结果表明,成功地对TLR2-2基因和MyD88-2基因进行了干扰,而在TLR2-2基因被干扰后,MyD88-2基因的表达量显著下降,但在MyD88基因被干扰的长牡蛎中TLR2-2基因表达量没有明显变化。     

激素配比和pH值对蓝莓试管苗增殖生长的影响

该文以对土壤p H值适应性截然不同的蓝莓品种‘斯巴坦’和‘北陆’试管苗为试材,研究二者组织培养条件下对激素配比和p H值的要求。结果表明:‘斯巴坦’试管苗增殖培养基最佳激素配比为ZT0.3 mg/L+IBA 0.2 mg/L,p H值4.5;‘北陆’试管苗增殖培养基最佳激素配比ZT 0.3 mg/L+IBA 0.1 mg/L,p H值5.0。     

超级稻深两优5814产量结构分析及其高产栽培技术

深两优5814是由国家杂交水稻工程技术研究中心清华龙岗研究所育成的籼型两系超级杂交稻新组合,本文对其产量构成因素及产量进行了统计分析。结果表明,各产量构成因素对产量的影响由大到小依次为每穗粒数>有效穗数>结实率>千粒重,据此提出了相应的高产栽培技术以发挥该组合的增产潜力。     

河流水体有机碳研究综述

该文综述了河流水体有机碳的研究状况,相关研究表明,不同类型的河流其有机碳含量及来源均存在显著差异;水温、土壤有机质的侵蚀及人类活动的干扰等均会对河流水体有机碳的输出通量产生重要影响。     

维药菊苣提取物对Balb/c小鼠肝纤维化的治疗作用研究

目的 探讨维药菊苣正丁醇提取物（CGB）抗雄性小鼠肝纤维化的治疗作用。方法 采用刀豆凝集素（Con A）在Balb/c雄性小鼠诱导肝纤维化，造模成功后第6周分别用低剂量（100 mg/kg）和高剂量（500 mg/kg）CGB干预治疗，并以秋水仙碱（0.1 mg/kg）做阳性对照。治疗第10周处死小鼠留取肝脏组织和血清，比较各组小鼠肝功能、关键性肝纤维化指标。病理分析肝脏组织变化和TGF-β1/Smad信号通路相关因子表达差异。结果 与模型组比较，CGB治疗组的肝功能指标（ALT，AST）和血清肝纤四项指标（PC-Ⅲ、CIV、LN和HA）指标不同程度降低（P＜0.05）；肝组织TGF-β1蛋白表达下降，Smad7蛋白表达升高（P＜0.05）。肝脏组织病理显示，不同剂量CGB治疗均能一定程度上减缓小鼠肝纤维化的发展。结论 CGB具有抗肝纤维化的活性，影响TGF-β1/Smad信号通路可能是其潜在的抗肝纤维化作用机制。