污泥膨胀和生物泡沫的形成机理和控制方法

污泥膨胀和生物泡沫是活性污泥法在实际工程应用过程中普遍存在的问题,其主要是由于丝状菌过度繁殖。微生物种群变化和污泥沉降性能下降,以及随之出现的污泥膨胀和生物泡沫现象,会导致系统出水水质变差,运行成本提高,严重时可能会导致整个处理系统的瘫痪。文中讨论了污泥膨胀和生物泡沫产生的原因,总结了国内外污水厂污泥膨胀和发泡时常见的微生物,并对相关的控制技术进行了较为全面的综述。     

Preparation and characterization of rare earth fluorescent anti-counterfeiting fiber via sol-gel method

A benzoic acid rare earth(Tb) complex was synthesized and characterized.The excitation and emission spectra of the complex were investigated,and then pure organic complex was incorporated with inorganic matrices(SiO2) through sol-gel method.The composition and structure of the hybrid complex was characterized through the IR spectra,TG,TEM and fluorescent spectrometer.Furthermore,the polypropylene(PP) fluorescent fiber with the organic-inorganic hybrid was prepared by melt spinning.The fluorescent and mechanical properties of the fiber were also tested.The results showed that after sol-gel coating the average particulate dimension of the hybrid rare earth complex was less than 100 nm and thermal stability was improved.Meanwhile,the fiber possessed excellent fluorescent and mechanical properties,which could be used as a candidate applied to excellent fluorescent anti-counterfeiting fiber.     

广西花山地区ETM^＋影像数据中矿化和蚀变信息的提取方法

以广西花山花岗岩区为研究对象,ETM^＋遥感数据为信息源,波谱理论为基础,采用基于单波段图像分类生成彩色合成图像法,利用岩矿光谱特性与遥感数据波段之间相关关系来进行矿化蚀变信息提取。对比分析单一波段组合法与改进了的Crosta法来提取金属矿化和蚀变信息,试验其方法的优选性,认为改进了的Crosta法能更加有效地提取矿化蚀变信息。     

广西花山地区ETM~+影像数据中矿化和蚀变信息的提取方法

以广西花山花岗岩区为研究对象,ETM+遥感数据为信息源,波谱理论为基础,采用基于单波段图像分类生成彩色合成图像法,利用岩矿光谱特性与遥感数据波段之间相关关系来进行矿化蚀变信息提取。对比分析单一波段组合法与改进了的Crosta法来提取金属矿化和蚀变信息,试验其方法的优选性,认为改进了的Crosta法能更加有效地提取矿化蚀变信息。     

Synthesis,characterization and fluorescence properties of a novel rare earth complex for anti-counterfeiting material

A novel ligand with two ester groups,two benzene rings and two carbox yl groups was synthesized. The composition and structure of the ligand were char acterized by the Fourier transform infrared spectroscopy(FT-IR) ,nuclear magnet ic resonance spectrum(NMR) and UV spectrometer. The rare-earth complex with the ligand and 1,10-phenanthroline(phen) was synthesized and structurally charact erized by FT-IR,TG and fluorescent spectrometer. The results showed that the no vel multicarboxyl ligand could efficiently transfer the energy to Eu3+ ions in t he complex and sensitize the luminescence of the rare earth ions,and the comple x could emit strong fluorescence of the rare earth ions.     

仿生合成氧化锆固定化漆酶处理孔雀石绿

以溶菌酶作为诱导剂,仿生合成了ZrO₂固定化漆酶纳米颗粒,其酶活回收率达59%,采用场发射扫描电子显微镜（FESEM）、能谱仪（EDS）、热重分析仪（TGA）等手段对ZrO₂纳米颗粒及ZrO₂固定化漆酶颗粒进行表征,结果表明漆酶可成功固定到ZrO₂颗粒中,同时还证明了溶菌酶既作为诱导剂催化ZrO₂的形成,又作为生物模板同酶一起包埋在ZrO₂颗粒中。固定化漆酶的最适pH为3,最适温度为70℃,相比于游离酶,其pH、温度稳定性都有明显提高;固定化漆酶纳米颗粒在4℃下储存30d,活性为初始酶活的95%,重复使用5次,固定化酶的残余酶活力仍有60%。此外,固定化漆酶在6h内对孔雀石绿染料的脱色率高达95%以上,通过紫外-可见吸收光谱分析（UV-vis）可知,固定化漆酶对孔雀石绿染料的处理是由吸附和降解联合作用引起的脱色。     

青藏高原狭果茶藨子果实提取物成分、抑菌活性及其抗疲劳活性

以产自青藏高原的狭果茶藨子果实为原料,分别制备有机酸提取物、乙酸乙酯萃取物、正丁醇萃取物,对其进行抑菌活性和抗疲劳活性研究,以期为狭果茶藨子资源的开发利用提供理论依据。抑菌试验结果表明:狭果茶藨子果实中不同粗提物均具有一定的抑菌作用,当浓度为100 mg/mL时,乙酸乙酯萃取物Ⅱ对白色念珠菌抑制效果最好,抑菌圈直径达20 mm,表现为极敏,粗提物中总有机酸和总黄酮含量分别为(2.30±0.1)、(2.28±0.02) mg/g,抑菌圈试验效果比阳性对照药氨苄西林(10 IU/片)好,对白色念珠菌的MIC、MBC值分别为1.56、3.13 mg/mL,且其抑菌效果随提取物浓度的升高而增强。小鼠负重游泳试验表明:与空白对照组相比,狭果茶藨子果实中乙酸乙酯萃取物Ⅱ各剂量组均能显著延长小鼠负重游泳时间(p0.05),提高小鼠肌糖原、肝糖原储备能力,增强乳酸脱氢酶活性,同时降低血清尿素氮含量,效果优于红景天阳性对照组,说明狭果茶藨子果实具有良好的抗疲劳活性。     

5G移动通信传输网络建设探究

现代社会的发展逐渐趋向信息化,移动通信技术衍生出了更丰富的种类。虽然我国已进入商业运营5G移动通信时代,但还需要在原有基础上加强移动通信网络建设的研究力度,不断优化移动通信网络的结构体系。文中首先分析了5G移动通信网络的特征,明确了5G移动通信网建设需求,探讨了5G移动通信网络建设的关键技术与应用场景,以期为相关工作人员提供理论性帮助。     

不同钾肥用量对2年生宽叶羌活生物量·药材产量及品质的影响

[目的]探讨钾肥对宽叶羌活(Notopterygium forbesii de Boiss.)生物量、药材产量及品质的影响,为其人工种植过程中合理施肥提供科学依据.[方法]在西宁多巴镇采用单因素6水平随机区组设计进行宽叶羌活钾肥施用量试验.钾肥6个施用量水平分别为0、37.5、75.0、112.5、150.0、187.5 kg/hm2.[结果]钾肥用量对羌活株高和复叶数没有明显影响;而对羌活的根茎粗、侧根数、地上部分干重、根长、最大叶长、最大叶宽和根部干重有一定的促进作用;钾肥施用量在75.0 kg/hm2时,对羌活的侧根数促进作用最大;钾肥施用量在112.5 kg/hm2时,对根茎粗、地上部分干重促进作用最大;随着钾肥施用量的增加,羌活根产量、挥发油含量、醇浸出物含量逐渐增加,但当钾肥施用量达到150.0 kg/hm2时达到最大值;钾肥施用量为150 kg/hm2时,对羌活根长、最大叶长、最大叶宽、根部干重、根产量、挥发油含量和醇浸出物含量有显著的促进作用.[结论]考虑到生产成本,选用112.5 kg/hm2为羌活的最佳钾肥施用量.     

Synthesis,characterization and fluorescence properties of a novel rare earth complexes with a multi-branched ligand and 1,10-phen

A novel multi-branched ligand with multiple ester groups,multiple benzene rings and multiple carboxyls was synthesized.The composition and structure of the ligand were characterized through the Fourier transform infrared spectroscopy(FT-IR),nuclear magnetic resonance spectrum(1H NMR) and UV spectrometer.The composition and fluorescence properties of rare earth complexes with the ligand and 1,10-phenanthroline(phen) were researched via FT-IR,EA and fluorescent spectrometer.The results presented that the resulting complex had strong characteristic fluorescence spectrum of the rare earth ions,which was attributed to the synergistic effects of the ligand,phen,and rare earth ion.