Performance of Drainage Reuse as Waterscape Treated by Combinational Technique of Biologic Contact Oxidation and Constructed Wetland

The high grade gray water was pre treated by biologic contact oxidation on load of 0.72 KgBOD5·m-3·d-1, and then post treated by constructed wetland. On the basis of experiment, it was found that: Totle nitrogen (TN) was the restrictive index of the combinational technique. To meet the reclaimed water quality standard and reuse for waterscape, the peak hydraulic load of constructed wetland was 0.50 m·d-1 in summer (30~36 ℃), and 0.33 m·d-1 in winter (8~12 ℃). And the load ratio of the peak hydraulic under the summer and winter conditions was 3:2. With the experimental results and reclaimed water quantity requirements in different seasons of buildings, treatment scale can be determined.     

Theoretical Analysis and Testing of Ground Treatment Using an Expansive Method in Very Thick Collapsible Loess

Through technological research of foundation treatments in the collapsible loess areas, we recommend a method of treating foundations in collapsible loess with quicklime piles. We set forth the basic principle of this expansive method. When a very thick foundation in collapsible loess is treated, the computational formula for the volume of expanding material in a quicklime pile is deduced based on cavity expansion theory. This theory is applied to engineering practice. Physical and mechanical properties of the compacted soil are tested. The result shows that the collapsibility of a foundation in loess has been eliminated, its physico mechanical indexes have been improved, and the soil compressibility and the modulus of compressibility also increase remarkably, demonstrating the correctness of the computation theory. The feasibility of the expansive method for very thick collapsible loess areas is further established.     

旧水泥混凝土路面沥青罩面改造研究

本文在调查了解国内许多旧路改造实践工程的前提下,基于内蒙古扎赉特旗音德尔路的改造实践,对旧水泥混凝土路面沥青罩面改造进行了系统的分析研究。主要的研究内容包括：原有路面结构性能的评估,旧水泥混凝土路面沥青罩面改造中沥青罩面层的设计。     

浅谈砖混房屋的裂缝

从材料特征因素、施工因素、地基不均匀沉降因素、环境温度因素、设计因素等几方面分析了北方多层砖混房屋墙体产生裂缝的原因。并从设计、施工及管理维修的不同角度提出了预防和处理裂缝的方法。     

Process integration of ethanol production from Japanese beech as treated with hot-compressed water followed by enzymatic treatment

Ethanol was produced from the hydrolysate collected as a water-soluble (WS) portion and a residue after hot-compressed water (HCW) treatment of Japanese beech with and without fractionation. Simultaneous saccharification with β-xylosidase and isomerization with xylose isomerase followed by fermentation with Saccharomyces cerevisiae were applied to the WS portion; simultaneous saccharification with cellulase and fermentation with S. cerevisiae was applied to the residue. Integration of the processes for the WS portion and the residue was investigated to improve the conversion efficiency throughout the whole process. The ethanol yield in the integrated process without fractionation was comparable with that for the process with fractionation. Ethanol yields were improved for both of the processes by modifying the operation pattern in which cellulase was added prior to fermentation of the residue.     

超声波与纳米TiO_2改性脲醛树脂的研究

为了降低脲醛树脂的游离甲醛含量及其胶接制品的甲醛释放量,采用超声波技术,在脲醛树脂合成的过程中加入纳米TiO2对脲醛树脂进行改性。通过改变超声频率和纳米TiO2的添加量考察了其对脲醛树脂的黏度、固化时间、游离甲醛含量及胶合板的甲醛释放量和胶合强度的影响。结果表明:超声频率和纳米TiO2添加量对脲醛树脂甲醛释放量和胶合强度影响显著。当超声频率为28 kHz、纳米TiO2的添加量为0.05%时,树脂的游离甲醛含量降低了77.8%,胶合板的胶合强度提高了155%,甲醛释放量降低了68.3%。13C-核磁共振分析显示,在超声波的作用下,纳米TiO2改性脲醛树脂中有Uron-CH2-Uron结构存在。     

22个苹果品种和砧木试管苗对热处理脱毒效应的研究

用RT-PCR对22个苹果品种和砧木携带3种潜隐性病毒的情况进行了检测,并用变温热处理结合茎尖培养对22个苹果品种和砧木组培苗脱除潜隐性病毒的效应进行了研究。结果表明:不同的苹果品种和砧木耐热性不同。其中‘王林’、‘乔纳金’、‘嘎啦’、‘金冠’、‘珠美海棠’、‘P22’的耐热性最强;‘GM256’、‘弘前’、‘SH’系耐热性最差;‘惠民短枝富士’、‘浓红富士’、‘天红1号’、‘B9’、‘M9’、‘P59’、‘77-34’、‘天红2号’、‘Jazz’的耐热性居中。在相同处理条件下,不同的苹果基因型脱毒率存在差异。‘惠民短枝富士’、‘SH17’、‘M9’、‘GM256’、‘弘前’脱毒率最高,‘77-34’、‘P59’、‘P22’、‘天红1号’次之,‘乔纳金’、‘SH40’、‘SH38’、‘浓红富士’的脱毒率最低。另外,不同病毒种类脱除的难易程度也存有差异,ACLSV最容易脱除,ASGV最难脱除,ASPV居中。     

热处理对黄瓜LOX和PLD活性的影响

为了研究冷害温度(2℃)下PLD和LOX活性的变化规律,以黄瓜为研究对象,对其进行采后38,45和52℃ 30 min热水处理,测定2℃贮藏期间(15 d)黄瓜的细胞膜透性、丙二醛含量、PLD活性和LOX活性.结果表明:热水处理可以抑制果实细胞膜渗透率的升高,减少低温贮藏期间丙二醛的积累,降低黄瓜低温贮藏过程中PLD及LOX的活性,且以45℃、30 min热水处理效果最显著.     

KH_2PO_4渗调处理恢复和提高榉树种子活力的研究

采用不同浓度的KH_2PO_4处理常温贮藏12个月和18个月的榉树种子,结果表明:KH_2PO_4处理可提高榉树种子的发芽势、田间出苗率、活力指数及细胞膜系统的完整性,提高了种子的活力.在一定范围内,随着KH_2PO_4处理浓度的增加,榉树种子的活力也相应增加,KH_2PO_4处理浓度以3 g/L最佳,处理时间为24 h.     

钙处理对红江橙采后贮藏品质影响的研究

研究了采后钙处理对室温条件下贮藏红江橙品质的影响。结果表明,不同浓度钙离子对红江橙的品质特性均有不同的影响。4．0％CaCl2溶液处理抑制了红江橙过氧化物酶（POD）及多聚半乳糖醛酸酶（PG）的活性,促进了过氧化氢酶（CAT）活性的提高,保护了细胞组织结构、减轻了脂质过氧化程度、延缓了果实的衰老,从而使其呼吸强度、电导率明显降低。可溶性固形物、可溶性总糖、VC含量的下降速度及总酸度的上升得到抑制,其营养物质量明显高于对照组;红江橙果实的硬度、失重率、腐烂率得到了较好的控制,有效地降低了其腐烂速度,90天时腐烂率仅为7．51％．贮藏保鲜效果明显。