论高校校报在和谐校园文化建设中作用——以近五年《吉林化工学院报》为例

高校校报作为高校党委和行政的机关报,高等院校重要的新闻舆论工具,以其党委喉舌的权威性,新闻报道的真实性,新闻传播的广泛性等特点决定了它在和谐校园文化建设中担任重要角色。本文以近五年《吉林化工学院报》在校园文化建设中所作的实践探索为案例,采用演绎与实证结合的研究方法,论述了校报有效利用新闻评论、深度报道和文艺副刊的形式在和谐校园文化建设中发挥引导、启迪和熏陶作用时的具体做法。     

校园文化思想政治教育功能及其实现

校园文化是思想政治教育重要的载体,具有育人导向、渗透和熏陶、约束、规范和传承、融合、创新文化等功能,本文依据时代的特征,从"两课"进网络文化、加强对校园文化活动的思想导向;结合本院社团文化活动的实际,阐述了对校园文化思想政治功能实现问题的看法。     

Debug软件在微机原理课程教学中的应用与实践

介绍了Debug调试软件的起源以及DOS系统对.EXE执行文件的管理方法,探讨了利用Debug软件调试程序的方法,利用Debug将抽象教学转变为直观教学,能够有效帮助学生理解微处理器程序的执行过程,从而改善教学效果和提高教学质量。     

Characterization of polymer bulk heterojunction photocell with unmodified C70 prepared with halogen-free solvent for indoor light harvesting

Although photocells are commonly characterized under AM1.5G 100 mW cm⁻² (1 sun) illumination, their performance under low light illumination is also important, because photocells are frequently used for indoor applications. In this study, polymer photocells based on a bulk heterojunction composite consisting of a low energy gap polymer PTB7 and unmodified C₇₀ prepared with a halogen-free solvent 1,2,4-trimethylbenzene have been characterized under the illumination of 1 sun or below. A typical photocell with the power conversion efficiency (PCE) of 4% at 1 sun shows the PCE of approximately 7% at 10⁻³ sun, which seems to fit for some indoor applications such as a permanent power source for a wireless sensor node. The sublinear dependence of short-circuit photocurrent on light intensity as well as the increase of fill-factor under low light illumination yields the increased efficiency under low light illumination. An analysis employing a one-diode equivalent circuit model suggests that the increased parallel resistance as well as the decreased saturation current of the diode under low light illumination accounts for the latter feature. It is also pointed out that the parallel resistance and/or the saturation current under dark strongly influence the PCE of a photocell under low light illumination. In addition, the dependence of the device performance on the light intensity is found to be useful for analyzing the effects of the thermal treatment and the PFN interlayer at cathode.     

Strong UV intensity enhancement in ZnO nanorods via surface modification of formic acid

The ZnO nanorods arrays synthesized by the chemical bath deposition method were surface modified by the formic acid at room temperature in a very short time. The optical properties of the samples before and after modification had been investigated in detail. The results showed a remarkable strong enhancement of UV emission intensity by almost a factor of 14 after the formic acid modification, which is mainly attributed to the great suppression of the surface recombination since the formic acid can effectively remove a part of OH bonds on the surface of ZnO nanorods.     

Bipolar transport materials for electroluminescence applications

Benzofuranyl benzene incorporating naphthyl (phenothiazinyl or dimesitylboryl) entities via meta-conjugation have been synthesized. These compounds exhibit bipolar transport characteristic with mobilities in the range of 10⁻⁵ to 10⁻⁴ cm²/V s at an electric field of 4 × 10⁵ V/cm. The compounds with two naphthyl or dimesitylboryl substituents emit in the violet region with good solution quantum yields. The OLEDs fabricated from the benzofuranyl/dimethylboryl, benzofuranyl/naphthyl and benzofuranyl/dimethylboryl/phenathiazine derivatives have maximum external efficiencies of 1.01%, 1.41% and 3.14%, respectively.     

Two-step surface modification for bottom-contact structured pentacene thin-film transistors

We investigated surface treatment effects of hexamethyldisilazane (HMDS), poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) and l-cysteine on gold source/drain electrodes in bottom-contact structured pentacene thin-film transistors (TFTs). The treatment methods include spin coating and immersing. We have also researched on two-step treatment based on the combination of each treatment methods. The highest device performance was achieved by treating gold S/D electrodes with l-cysteine first and PEDOT:PSS afterwards, showing field effect mobility up to 0.35 cm²/V·s. l-cysteine can reduce the contact resistance between metal and semiconductor layer, and PEDOT:PSS acted as a hole transporting layer while HMDS decreased the surface energy, which enlarged the grain size of pentacene on it.     

An efficient nonfullerene acceptor for all-small-molecule solar cells with versatile processability in environmentally benign solvents

A new structure of dicyanodistyrylbenzene-naphthalimide-based nonfullerene acceptor NIDCSN was synthesized and characterized to have a favorable electron accepting property and versatile processability in various organic solvents. The nonfullerene all-small-molecule solar cells comprising p-DTS(FBTTh₂)₂ as the donor and NIDCSN as the acceptor exhibited a maximum power conversion efficiency of 3.45% with a remarkable open-circuit voltage of 1.04 V, together with similar device performances when fabricated in five different solvents including environmentally benign non-halogenated ones.     

氢化物发生-原子荧光光谱法测定醋酸钙中重金属元素

醋酸钙是一种很好的食品添加剂,在食品领域应用极为广泛,因此应严格控制醋酸钙中重金属元素的含量以符合食品安全的要求.本文采用氧化物发生-原子荧光光谱法测定醋酸钙中的重金属元素的含量,并对影响因素以及共存元素的干扰情况进行了考察.研究结果表明,在线性范围分别为0～100ng/mL,0～1.0ng/mL,0～10ng/mL,0～1.0ng/mL的范围内,As,Hg,Se,Cd四种元素的线性方程分别为:If=50383C+18.43,If=9196.9C+269.06,If=241.68C+23.539,If=1174C+62.594.四种元素方法的检出限分为:0.17ng/mL,0.58ng/L,0.011ng/mL,1.61ng/L,应用本方法测得各元素的回收率为96.07%～104.40%.此方法快速、简便,得到结果令人满意,满足测定要求.     

猴腿蹄盖蕨总黄酮的超声提取工艺

以提取得率为考察指标,通过单因素和正交试验探索了猴腿蹄盖蕨总黄酮的超声提取工艺条件。猴腿蹄盖蕨总黄酮最佳的超声提取条件为:料液比为1∶45(g/m L),乙醇浓度为60%,提取时间为105 min,提取次数为3次,在此条件下,猴腿蹄盖蕨总黄酮的提取率为162.71 mg/g,说明超声法可用于猴腿蹄盖蕨总黄酮的提取,具有一定的应用价值。