Inhibition of Micro RNA 219 Expression Protects Synaptic Plasticity via Activating NMDAR1, Ca MKIIγ,and p-CREB after Microwave Radiation

In recent decades,the potential health hazards of microwave exposure have been attracting increasing attention.Our previous studies have demonstrated that microwave exposure impaired learning and memory in experimental animal models[1,2].

2-Steps Preparation Activated Carbon from Solidago Canadensis:Carbonized by Electrial heating and Activated by Microwave Radiation

The activated carbon(AC)was prepared from Solidago Canadensis(SC),an alien invasive plant.The plant was firstly carbonized under nitrogen at 400 ℃ for 90 min in an electrical furnace,and then the carbonized product was activated with KOH through microwave radiation.Effects of KOH/C ratio,microwave power,microwave radiation time on the adsorption capacities and yield of AC were evaluated.It indicated that the optimum conditions were KOH/C ratio 2 g/g,microwave power 700 W,and microwave radiation time 6 min.The carbonation process of SC was analyzed by thermogravimetry(TG).The pore structural parameters and surface functional groups of the AC were characterized by nitrogen adsorption-desorption and Fourier Transformed Infrared Spectroscopy(FTIR),respectively.The activation yield,the surface area,the average pore size,and the average micropore size of AC prepared from optimum conditions were 53.75%,1 888 m2/g,0.567 nm,and 0.488 nm,respectively.The adsorption amounts of AC were 302.4 mg/g for methylene blue and 1 470.27 mg/g for iodine.

New Activated Carbon with High Thermal Conductivity and Its Microwave Regeneration Performance

Using a walnut shellas a carbon source and ZnCl_2 as an activating agent,we resolved the temperature gradient problems of activated carbon in the microwave desorption process.An appropriate amount of silicon carbide was added to prepare the composite activated carbon with high thermalconductivity while developing VOC adsorption-microwave regeneration technology.The experimentalresults show that the coefficient of thermalconductivity of SiC-AC is three times as much as those of AC and SY-6.When microwave power was 480 W in its microwave desorption,the temperature of the bed thermaldesorption was 10 ℃ to 30 ℃ below that of normalactivated carbon prepared in our laboratory.The toluene desorption activation energy was 16.05 k J·mol^（-1）,which was 15% less than the desorption activation energy of commercialactivated carbon.This study testified that the process could maintain its high adsorption and regeneration desorption performances.

Surface Structure and Catalytic Behavior of MnO_(1+x) Radiated by Microwave

Introduction The surface structure, distribution and strength of the active centers of a catalyst would directly affect its catalytic activity and selectivity. In principle all the techniques and methods which can modify the surface and body structure of a catalyst, or influence its physicochemical properties can be used to change the activity and selectivity of a practical catalyst.

Buoyancy driven Flow of a Second-Grade Nanofluid flow Taking into Account the Arrhenius Activation Energy and Elastic Deformation:Models and Numerical Results

The buoyancy driven flow of a second-grade nanofluid in the presence of a binary chemical reaction is analyzed in the context of a model based on the balance equations for mass,species concentration,momentum and energy.The elastic properties of the considered fluid are taken into account.The two-dimensional slip flow of such non-Newtonian fluid over a porous flat material which is stretched vertically upwards is considered.The role played by the activation energy is accounted for through an exponent form modified Arrhenius function added to the Buongiorno model for the nanofluid concentration.The effects of thermal radiation are also examined.A similarity transformations is used to turn the problem based on partial differential equations into a system of ordinary differential equations.The resulting system is solved using a fourth order RK and shooting methods.The velocity profile,temperature profile,concentration profile,local skin friction,local Nusselt number and local Sherwood number are reported for several circumstances.The influence of the chemical reaction on the properties of the concentration and momentum boundary layers is critically discussed.

Electromagnetic Radiation Causes Weight Loss and Weight Destabilization of Objects with Presumed Elevated Levels of KELEA (Kinetic Energy Limiting Electrostatic Attraction), Relevance to Human Health and to Global Warming

A natural force has been proposed, which is required to prevent the fusion and disappearance of the discrete electrical charges that are present on electrostatically attached opposing electrical charges. This force may also explain the repulsion between objects with either matching positive or negative electrical charges. The energy of this force is referred to as KELEA (kinetic energy limiting electrostatic attraction). KELEA is especially attracted to dipolar compounds and to other materials with spatially separated opposite electrical charges. These compounds can be used to increase the level of KELEA in water. KELEA activated water can become an added source of KELEA for objects that are placed in close proximity to the water. It is generally held that the weight of an object is solely determined by its mass in relation to that of the earth. Yet, it was previously reported that the measured weight of certain KELEA attracting objects can undergo considerable variability over time. This observation is consistent with the concept that KELEA can contribute to the measured weight of certain objects. The present study strengthens this concept by demonstrating that the weight of cellulose containing materials, including paper, cotton fabrics, and wood, is increased if the materials are placed close to containers of KELEA activated water. It is further shown that electromagnetic radiation can significantly reduce the added weight of the KELEA exposed cellulose containing materials. Moreover, the previously added weight of the materials can be regained by replacing the materials back into the KELEA enhanced environment. It is proposed that the electrical charges that accompany electromagnetic radiation are able to competitively withdraw some of the KELEA from certain KELEA-enhanced objects. This effect can be reliably demonstrated using single sheets of writing paper, which are primarily composed of mechanically-bonded, branched cellulose fibers. There can be considerable fluctuations of the weight of the materials exposed to electromagnetic radiation after having been placed nearby to KELEA activated water. The weight instability is interpreted as being due to the electromagnetic radiation also triggering a dynamic process of rapid additions and removals of significant quantities of KELEA to and from objects. These observations are relevant to the further understanding of KELEA and to the potential health and climate consequences of manmade electromagnetic radiation causing a reduction in the environmental levels of KELEA.

不同提取工艺对鸡油理化性质与挥发性风味物质的影响

为了探究不同提取工艺对鸡油理化性质与挥发性风味物质的影响。本研究分别采用干法、湿法和微波熬制三种工艺提取鸡油,并对不同工艺提取鸡油的理化性质进行综合比较,同时采用顶空-气相色谱-质谱联用仪测定其挥发性风味物质构成,结合相对气味活度值、主成分分析和聚类分析明确不同提取工艺鸡油中的关键挥发性风味成分组成差异。结果表明,干法熬制的鸡油亮度最低,颜色更红、更黄,丙二醛含量较低;湿法熬制的鸡油亮度最高,颜色偏绿、偏黄,酸价较低;微波熬制的鸡油亮度稍暗,黄色和红色较浅,提取率较高,氧化稳定性较好且熬制时间短。不同提取工艺鸡油样品中共鉴定出49种挥发性风味物质,其中干法、湿法和微波法三种不同工艺所提取的鸡油中挥发性风味物质分别有39种、41种和44种,共有挥发性风味物质30种。结合ROAV和PCA,确定了(E,E)-2,4-庚二烯醛、1-辛烯-3-醇、己醛、(E)-2-癸烯醛、1-戊醇、辛醛、(E,E)-2,4-癸二烯醛、3-甲基丁醛为鸡油的主要特征风味物质。微波法提取鸡油的特征性风味物质含量较高且种类较多。本研究表明微波工艺相对而言具有耗时短、得率高、氧化稳定好以及鸡油特征性风味物质含量较高且种类多等优点,是一种值得深入研究与探索的鸡油提取工艺。

茶多酚生物活性及作用机制研究进展

茶多酚是茶树体内一类具有酚羟基结构的多元酚类混合物的总称,是茶叶主要功能成分,在绿茶中含量相对较高。茶多酚生物活性研究广受关注,在功能食品、药物研发、保鲜防腐等领域具备广阔应用前景。茶多酚具有抗氧化、抗癌、降血脂、调节血糖、抑菌、抗辐射等多种生物活性,其作用机制主要涉及调控蛋白激酶B(Protein kinase B,AKT)、核因子κB(Nuclear factor-kappa B,NF-κB)、表皮生长因子受体(Epithelial growth factor receptor,EGFR)、腺苷酸活化蛋白激酶(Adenylate activated protein kinase,AMPK)等信号通路及相关蛋白。通过分析近年来相关研究文献,对茶多酚物质特性、生物活性及作用机制、应用领域等进行综述,以期为含茶多酚功能食品、天然药物等产品开发提供借鉴。

丝胶蛋白基多孔碳的制备及其吸波性能研究

为解决传统多孔碳材料制备工艺繁杂、污染大、成本高等问题,采用活化-碳化法处理废弃的丝胶蛋白,制备原位杂原子掺杂丝胶蛋白基多孔碳材料(Silk sericin-based derived porous carbon,SSC)。采用扫描电镜、X射线衍射仪和拉曼光谱仪对试样的形貌和结构进行表征,通过矢量网络分析仪测试材料电磁参数,探讨热处理温度对材料吸波性能的影响。结果表明:当丝胶蛋白和活化剂KHCO3质量比为2∶1、热处理温度为700℃时,制备的试样SSC-700具有最优吸波性能,且试样在16.55GHz处达到最小反射损耗(-51.30dB),匹配厚度为1.4mm,有效吸波频宽为3.60GHz(14.40~18.00GHz);SSC-700良好的吸波性能归因于材料自身的导电损耗和多种极化机制的协同作用。研究为生物质碳材料的开发和利用提供了新策略,制得的SSC材料在吸波领域具有广泛的应用前景。

蒙古栎5-9月叶片精油化学成分及其抗氧化活性分析

为了综合开发利用丰富的蒙古栎资源,探索蒙古栎5-9月叶片精油的化学成分和抗氧化活性,以蒙古栎5-9月叶片为原料,通过微波辅助水蒸气蒸馏法,分别提取每个月份的蒙古栎叶片精油,采用GC-MS分析其化学成分,通过对比精油与抗坏血酸(VC)对ABTS阳离子自由基和DPPH自由基的清除率评价精油的抗氧化活性。结果表明:蒙古栎5-9月叶片精油中共有9类70种化合物。不同月份叶片精油的化学成分存在一定差异。蒙古栎各月叶片的精油均具有抗氧化活性,且抗氧化活性随浓度增加而增强,其中5月叶片精油抗氧化活性最强,当其精油浓度为35mg·mL^(-1)时,对ABTS阳离子自由基和DPPH自由基的清除率分别为95.05%和76.19%。蒙古栎叶片精油具有一定的抗氧化活性,本研究为蒙古栎资源的开发利用提供了参考。

封闭式除草剂苗后喷施对小麦生长和杂草的影响

为探究封闭式除草剂苗后喷施对小麦生长和杂草的影响,以周麦22为试验材料,设置砜吡草唑用量125(T1)、250(T2)、500(T3)、1000(T4)、2000(T5)g a.i./hm^(2)和氟噻草胺用量184.5(T6)、369(T7)、738(T8)、1476(T9)g a.i./hm^(2)9个喷药处理和1个空白(清水)对照,研究不同除草剂对小麦光合特性、叶绿素SPAD值、光合有效辐射(IPAR)、叶面积指数(LAI)、鲜质量的影响及对杂草的化除效果。结果表明:T1、T6处理下小麦叶片的净光合速率高于对照,9个处理蒸腾速率均低于对照,T6、T1处理数值较大,气孔导度T1处理最大;胞间CO_(2)浓度T9处理最大,T1处理最小。在除草剂施用21 d时,T1处理SPAD值与对照差异有统计学意义。T1、T2、T3、T6、T7处理下,小麦IPAR和LAI均高于对照,且以T1处理下值最大,较对照分别增加18.37%、37.77%,T2次之。砜吡草唑施药剂量在125、250 g a.i./hm^(2)时(T1和T2)对小麦株高和鲜质量没有显著性影响;当剂量>250 g a.i./hm^(2)时,则会出现抑制症状,氟噻草胺不同用量小麦株高和鲜质量均受抑制。可见,T1和T2处理对小麦生长发育影响较小。T4、T5和T93个处理对所试杂草鲜质量防效均高于95%,T1和T62个处理对野燕麦的防效不明显。考虑到对小麦生长安全和用药成本,在对节节麦和野燕麦鲜质量防效达到50%~95%且对其余供试杂草鲜质量防效均高于95%的6个处理(T2、T3、T4、T5、T8、T9)中,推荐T2处理用于麦田苗后喷施。

微波辐射烟杆水蒸气法制活性炭工艺研究

采用正交试验法对影响木质活性炭性能的因素如微波辐射的功率、辐射时间、水蒸气流量等进行了系统研究,得到了最佳工艺条件:微波辐射功率700W,辐射时间6min,水蒸气流量为3.09mL/min。利用该工艺条件所制备的木质活性炭产率为20.74%,亚甲基蓝脱色率为160mL/g,碘吸附值为1018.7mg/g。该木质活性炭的微观孔隙呈蜂窝状,并向内部延伸,同时,柱状管壁上也有微细孔,将各柱状管道连为一体。结果表明:微波辐射法制备的活性炭比市售一级活性炭具有更发达的微孔隙结构。

微波改性活性炭的吸附性能

利用微波辐照技术代替传统的加热技术在N2 气中对煤质活性炭进行改性 ,以期提高活性炭的吸附性能。通过正交实验法 ,探讨了微波功率、辐照时间及样品粒径 3种因素对改性活性炭吸附效果的影响。结果表明 ,微波加热提高了活性炭的吸附能力 ,微波功率和辐照时间是决定改性活性炭吸附性能的关键因素 ,并通过对改性前后活性炭的孔隙结构和微结构变化进行分析 ,来讨论其改性机理。

微波辐照再生载甲苯活性炭

本文提出了一种运用微波辐照再生吸附有甲苯废气活性炭的新再生方法。通过正交试验 ,探讨了活性炭在微波辐照条件下脱附率与活性炭量、微波功率、载气线速度及再生时间等因素的关系 ;得出了再生的优化条件 ;测定了解吸速率曲线 ;对影响活性炭损耗的各因素进行了分析 ;并对再生后甲苯的冷凝回收法进行了探索。

微波强化NaCl改性沸石的除氨氮效果研究

为改善天然沸石对水中氨氮的去除效果,采用微波强化NaCl活化对沸石进行改性,考察了微波加热时间、功率及活化方法的影响。结果表明,微波加热可疏通沸石内部孔道,NaCl活化能改善其离子交换性能;与经NaCl及NaCl+NaOH活化后的改性沸石相比,经89 W微波加热4min后再用饱和NaCl活化后的改性沸石,对氨氮的去除率提高了10%以上;改性沸石对氨氮的吸附速率显著加快,反应30 min时对氨氮的去除率可达80%,饱和吸附容量达到13.5 mg/g,高于天然沸石的吸附容量(10.11 mg/g)。

微波辐射预处理对污泥结构及脱水性能的影响

将微波辐射用于污水污泥预处理，考察了辐射130s内污泥沉降、过滤脱水性能的变化，并通过粒度分布及污泥胞外聚合物含量变化探讨了相关机理，分析了微波辐射对污泥结构的破坏过程．结果表明，适宜的微波辐射可明显改善污泥结构及脱水性，900w微波辐射50s，SV减少48％，真空抽滤含水率由原泥直接抽滤的85％降为71％．污泥结构破坏是改善污泥脱水性的重要因素，胞外糖含量介于15.8～16.5mg／gMLSS时，污泥脱水性最佳．核酸能较好地指示微波辐射下污泥细胞壁开始破裂的时间，过量的微波辐射因破坏污泥的细胞壁结构、导致胞内物质大量溢出、污泥黏度增加，脱水性恶化．

微波辐射-KOH活化兰炭粉制备活性炭

研究了以兰炭粉为原料,KOH为活化剂,采用微波辐射法制备活性炭的可行性。探讨了微波功率、碱炭质量比和活化时间对活性炭吸附性能的影响。同时采用美国ASAP-2020吸附仪测定了所制备活性炭的N2吸附脱附等温线和孔径分布,采用红外光谱分析了样品的表面官能团。结果表明:微波功率为700 W,碱炭质量比为3,活化时间为15 min工艺条件下制得的活性炭碘吸附值为694.5 mg/g,比表面积为513.62 m2/g,总孔容为0.510 3 cm3/g,平均孔径为3.973 8 nm,该活性炭为中孔型。以兰炭粉为原料,传统加热和微波加热制备的活性炭红外光谱图其峰形基本一致,只是峰强不同。

微波辐照稻杆制造活性炭

研究了微波辐照经氯化锌浸渍的稻杆制造活性炭。实验结果表明 ,经微波辐照 8min ,所得活性炭的亚甲基蓝脱色力为 15mL/ 0 .1g ,为国家标准一级品 (LY 2 16- 79)的 1 2 5倍 ,时间仅为传统方法的 1/ 45。

微波辐射处理亚甲基蓝染料废水的实验研究

考察了微波辐射后GAC和ACF的SEM形貌,研究了微波辐射处理亚甲基蓝染料模拟废水情况。结果表明:微波辐射后GAC和ACF的烧蚀程度加深,GAC的孔隙直径增大;ACF纤维丝断头增多,纤维丝表面变得粗糙不平;GAC和ACF加入量越大,亚甲基蓝染料的去除率越高;微波辐射时间越长,脱色率越高;微波辐射功率越大,去除率越高;微波辐射催化能够增强GAC和ACF在液相中的吸附能力。ACF吸附性能较GAC好。

微波化学法合成可见光响应氮掺杂纳米TiO_2光催化剂

以水为溶剂,尿素为氮源,用微波化学法合成了具有高活性的可见光响应氮掺杂纳米TiO2光催化剂。采用XRD、FT-IR、TEM、UV-vis等手段对样品的性能进行了表征分析,并以甲基橙为目标降解物,考察了催化剂在普通日光灯照射下的光催化活性。结果表明,所制备的N-TiO2粉体在400、450、500、550℃热处理4h后仍为锐钛矿相;光催化剂中的N以共价键的形式存在于TiO2晶格之中;样品的吸收阈值波长可红移至500nm左右;当煅烧温度为400℃时,样品表现出最佳的光催化活性。