Miracle-dz/UniFAR-FTUs huggingface dataset:
Application of DNA-overoxidized Polypyrrole Composite Biosensor

A promising electrochemical microsensor was fabricated by electrochemical immobilization of DNA on a carbon fiber electrode(CFE) through an overoxidized polypyrrole(PPyox) template for simultaneous determination of serotonin(5-HT) and dopamine(DA). Such a nano-thickness DNA-PPyox biocomposite modification layer exhibited a superior selectivity and sensitivity towards these neuronal amines comparing with a simple PPyox or DNA coating. This microsensor gave three separated differential pulse voltammetric(DPV) peaks at 0.38, 0.20 and -0.02 V for 5-HT, DA and 25000-fold excess of ascorbic acid(AA). The utility of this composite biosensor was demonstrated by the determination of 5-HT content in healthy human blood serum and DA in its hydrochloric injection.
141. Notes on the vocalizations of Golden-crowned Flycatcher (Myiodynastes chrysocephalus) and Golden-bellied Flycatcher (Myiodynastes hemichrysus)

In the following we briefly analyze and compare voice of the different races of Golden-crowned Flycatcher (Myiodynastes chrysocephalus) and Golden-bellied Flycatcher (Myiodynastes hemichrysus). We also try to quantify the extent of any vocal differences using the criteria proposed by Tobias et al. (2010), as a support for taxonomic review. We have made use of sound recordings available on-line from Xeno Canto (XC) and Macaulay Library (ML).
NUMERICAL STUDY OF MULTIPHASE DROPLET FLOW IN NOZZLE PLUME AT VACUUM CONDITIONS

Processes occurring in multiphase nozzle and plume flows are of key importance for problem of spacecraft contamination produced by control thrusters. This paper presents some results of continuation of the study of droplet nozzle and plume flows in transitional regime [1]. Euler-Lagrange description of the droplet nozzle-plume flows is implemented in this study utilizing separate consideration of the phases on the basis of appropriate models for the carrier phase and the probe droplet model for the dispersed phase. Phase coupling is realized with a procedure of temporal-spatial averaging of trajectory parameters of the probe droplets in each computational cell providing source interphase transport terms. At the Euler stage of the algorithm a hybrid Navier-Stokes (NS)/Direct Simulation Monte Carlo (DSMC) approach is used to simulate the flow in different regimes, from a dense flow inside the nozzle, through very fast expansion near the nozzle lip, to rarefied, free-molecular flow in the back flow region. The Lagrange stage of the algorithm provides descriptions of motion, heating, evaporation/condensation of the droplets. Detailed description of algorithm of the Lagrange stage as well as discussion of closing relations for the interphase drag, heat and mass transfer are presented in [2]. Special attention is paid to regimes of transitional and rarefied flows characterized by moderate and high Knudsen numbers.
Towards Positive Public Administration: A Manifesto

Public administration –as a field of both academic study and professional practice – would benefit greatly from a more systematic and cohesive strand of research that is explicitly geared towards systematically studying the successes and positive contributions of government. At present, the citizenry at large is ill-informed about what government does well, while the civil service operates in a political environment that tends to derogate or discount its accomplishments. In this environment, it is incumbent for scholars to offer a more balanced appreciation for, and more empowering understanding of, public administration. Inspired by comparable developments in other disciplines, we outline the concrete steps and challenges in launching a “Positive Public Administration,” an approach to research and scholarship that examines the degree to which, the manner in which, and the conditions under which public policies, programs, projects, organizations, networks, and partnerships thrive, advance important democratic values, and produce widely valued societal outcomes.
Exploring the Role of the Fu Dao Yuan in Enhancing the Cultural and Social Experiences of International Students in China

Informing this qualitative study were 45 international students in a top-tier comprehensive research university in southeast China. The study focuses on the experience of international students towards the role played by international Fu Dao Yuan (Counselor) in enhancing the students’ cultural and social experiences at the university. The results revealed four most significant adjustment issues for international students. Building on the U-Curve adjustment theory (Oberg, 1960), the study discovered the importance of international Fu Dao Yuan to provide cultural and social support to international students for easy adjustment into a new culture and social setting. The study bears practical implications as to providing international Fu Dao Yuan with important insights that help to create an environment conducive for enhancing the cultural and social experiences of international students. Keywords: cultural experience; social experiences; Fu Dao Yuan; student affairs office; international students DOI: 10.7176/JEP/11-31-06 Publication date: November 30 th 2020
Triterpene Saponins Isolated from Ilex pubescens (III)

Traditional chinese medicine of Ilex pubescens(Mao-Dong-Qing) is commonly used to treat the cardiovascular diseases in South China.The preliminary bioassays showed that the total saponins isolated from Ilex pubescens exhibited significant potent degrading the plasma viscosity in rats.Meanwhile,our recent works indicated that the n-BuOH soluble fractions of ethanol extract(70%) from the root of the same species obviously inhibited the contraction(60 μg/mL) of rabbit thoracic aorta induced by norpinephrine in vitro.As a continuation of bioactive constituent from the n-BuOH of Ilex pubescens,five triterpene saponins were isolated.Their structures were elucidated by chemical,physical methods and spectroscopic analysis methods.As a result,they were identified as mussaendoside R(1),ziyu-glycoide I(2),Lucyoside H(3),ilexoside A(4),ilexoside O(5),excepescially.Compounds 1,2 and 3 were firstly obtained from Ilex pubescens.
Chemiluminescence analysis of pefloxacin mesylate with reversed micellar

In acidic condition,the nitrogen in pefloxacin mesylate was easily protonated and formed ion-complexes with negative ion AuCl-4,the ion-complexes were extacted and carried by dichloromethane,when the ion-complexes entered a reversed micellar of cetyltrimethylammonium chlorine containing luminol,the dissociated AuCl-4 reacted with luminol and produced an analytical chemiluminescnece signal.In the optimum conditions,the linear range is 0.001 to 10×10-6 g·mL-1 and the limit of detection is 0.02×10-6 g·mL-1 with a relative standard deviation(n=11) of ca.2. 4% for 1.0×10-6 g·mL-1 pefloxacin mesylate.The method has been applied to the determination of the studied drug in tablets,injection and biological fliuds successfully.
Comparison of Different Determination Methods of the Pollen Vitality of Different Lines Rape

[Objective]Five methods were used to determine the pollen vitality of different lines rape to find out their best determination method. [Method]Five determination methods were sucrose-based germination method,acetocarmine dyeing method,TTC dyeing method,I2-KI dyeing method and red ink dyeing method,respectively. [Result]The results showed that the pollen vitality values of different lines rape determined by red ink dyeing method and TTC dyeing method were on the high side,while that was on the low side determined by I2-KI dyeing method.The determination rescult of sucrose-based germination method and acetocarmine dyeing method were closer,and were the best way to determine the pollen viability. [Conclusion]When determining the pollen vitality of rape,it is better to first grasp the basic survival situation of pollen by acetocarmine dyeing method,and then determine its germination vigor by sucrose-based germination method,which is in favor of correctly reflecting pollen vitality.
Factors that Indicate Foreign Language Teachers’ Positive Impact on Students to Maintain Their Interest

Americans lack foreign language skills, and there is no solution in sight as various issues compound the already dire situation, including failure to understand the importance of acquiring other languages, instructional and curricular problems, teacher shortage, and lack of long-term study.The latter was the focus of this study. By means of an online survey, this qualitative study investigated how foreign language teachers determine whether or not they have a positive impact on their students to maintain their interest in the languages for long-term study.Findings revealed that the teachers believed that the factors that were indicative of their ability to maintain their students’ interest were, in order, the interest the students showed in the classes and the languages, theirengagement during class activities and academic success, the motivation they demonstrated, the feedback they provided about their classes and activities, and their relationships with their teachers.
Determination of pK a from Solubility Measurements in Simple Cases when No Additional Equilibria are Present

Julia Martin1*, Sarra El Moussaoui2 and Agustin G. Asuero2 1Department of Analytical Chemistry, Escuela Politécnica Superior, University of Seville, 41011-Seville, Spain 2Department of Analytical Chemistry, Faculty of Pharmacy, University of Seville, 41012-Seville, Spain *Address for Correspondence: Julia Martin, Department of Analytical Chemistry, Escuela Politecnica Superior, University of Seville. C/ Virgen de Africa, 7, E-41011 Seville, Spain, Tel: +349-545-562-50; E-mail:
Role of Equatorial Fountain for the Delayed Response of Thermosphere O1D 630.0 nm Dayglow Over the Dip Equator During an X‐Class Flare

This paper reports, for the “first time,” the delayed response of O1D 630.0 nm dayglow emissions over Trivandrum (8.5°N, 77°E, 0.5°N dip lat.), a geomagnetic dip equatorial station in India, to the noontime X‐class solar flare event of July 30, 2005. The dayglow measurements were made using a unique dayglow photometer operating at three wavelengths. The Equatorial Electrojet induced magnetic field, measured using a proton precession magnetometer, showed a magnetic spike having ∼90 nT enhancement during this flare with a time delay of ∼7.2 min. A noteworthy observation is that unlike to the conventional belief, the O1D 630.0 nm dayglow over the dip equator exhibited a fourfold enhancement during the noontime flare after a time delay of ∼45 min. Analysis of satellite measured electron density and modeling simulations indicate that the thermospheric O1D 630.0 nm dayglow emission over the dip equatorial region during a solar flare is primarily driven by the electrodynamics, rather than the direct solar control. This finding is new, unique and very important for the studies related to plasma‐neutral coupling and also for modeling studies on the equatorial thermosphere‐ionosphere region is concerned.
HPLC comparison of bile acids in Fellis Ursi powder,Fellis Suis powder,Calculus Bovis powder,Fellis Caprinus powder and Fellis Galli powder

Objective:To determinate the components of the bile acids in Fellis Ursi powder and Fellis Suis powder,Calculus Bovis powder,Fellis Caprinus powder,Fellis Galli powder by HPLC respectively and compare their chromatograms from each other.Method:The separation was performed on a Alltech Prevail Select C18column(250 mm×4.6 mm,5 μm). The mobile phase was composed of methanol-acetonitrile-0.03mol·L-1 sodium dihydrogen phosphate solution with gradient elution.The detection wavelengthwas 210 nm.The column temperature was 40 ℃. Results:The chromatograms of conjugated bile acids and bile acids by hydrolysis in five galls was clearly different.Conclusion:Five galls can be identified by HPLC.
Inverse Calculation of Surface Charge Based on Surface Potential Measurement

Distribution of surface charge can not be directly measured with current techniques but only be determined by complicate inverse calculations based on the results from indirect measurements.Therefore,we studied methods for the inverse calculation,and presented an improved method on the basis of the method proposed by Ootera and his colleagues.In the improved method,the original twice inverses of the incidence matrix were simplified to a once inverse.The surface charge accumulated on cone-type insulator in the air or the SF6 gas under DC voltage was calculated using the improved method.The results show that the distribution of the surface free charge obtained with the improved method is the same as that with the unimproved method.Compared with the original algorithm,the improved method can further obtain the density distributions of surface apparent charge and polarization charge.Moreover,it is found that,in the same gas environment,there is a significant difference in the amplitude of surface density between free charge and apparent charge,which is 370 and 530 pC/cm2 in the air and SF6 gas,respectively.
Temporal expression of polysaccharide biosynthesis genes in the leaves of Cyclocarya paliurus at different developmental stages

Background: Cyclocarya paliurus (Batal.) Iljinskaja is a common endemic tree species. The leaves of C. paliurus are used as a Chinese medicine and the main active components are polysaccharides. However, the temporal pattern of polysaccharide synthesis at different leaf developmental stages has not been reported to date. Results: With the development of leaves, the content of polysaccharides increased first and the highest content was found at the F3 stage (the third larger full expanded leaf). A total of 499710194 clean reads were obtained using C. paliurus genomic data and were assembled into 296593 unigenes. Among 4708 identified DEGs, 429 DEGs were up-regulated and 451 DEGs were down-regulated from F1 stage (the smallest full expanded leaf) to F2 stage (the second larger full expanded leaf), 630 DEGs were up-regulated and 60 DEGs were down-regulated from F2 stage to F3 stage, and 1833 up-regulated and 1816 down-regulated DEGs from F3 stage to F4 stage. Forty DEGs associated with GT belong to 13 GT families. Among them, only one gene was down-regulated from F1 stage to F2 stage, two genes were down-regulated from F2 to F3 stages, and 23 genes were down-regulated and 15 genes were up-regulated from F3 stage to F4 stage, respectively. A significant correlation exists between the five unigenes and the polysaccharide content. UDP-glucose 4-epimerase gene was significantly positively correlated with the polysaccharide content. A pathway map for the biosynthesis of C. paliurus polysaccharide was proposed. Among 150 transcription factors identified from DEGs, the majority was members of the AP2/ERF family (21, 14%), followed by the C2H2 family (14, 9.33%), the MYB family (12, 8%), the C2C2-GATA family (10, 6.67%), the GRAS family (9, 6%), and the zf-HD family (7, 4.67%). Conclusions: These results identified genes involved in the biosynthesis of Cyclocarya paliurus polysaccharides during different leaf developmental stages and provided evidence for the change of polysaccharide content during the development of C. paliurus leaves. Possible synthetic pathways and related transcription factors were suggested. This study provides information for the screening of polysaccharide biosynthesis related genes and elucidates the mechanism underlying polysaccharide biosynthesis in C. paliurus.
Kinetic Model for Layer-by-Layer Crystal Growth in Chain Molecules

A kinetic model is proposed to describe the structure and rate of advancement of the growth front during crystallization. Solidification occurs through the mechanisms of surface nucleation and lateral spreading of the solid phase within layers in the vicinity of the growth front. The transformation from liquid to solid within each layer is described by an equation similar to the two-dimensional variant of the Johnson–Mehl–Avrami (JMA) equation, but in which the finite size and shape of the critical nucleus and the dynamic evolution of the solid fraction of the underlying layers are taken into account. Connection to the regime theory of Hoffman and co-workers, for surface nucleation and spreading in one or two dimensions, is also made. Given only molecular level information regarding surface nucleation rates, lateral spreading rates, and critical surface nucleus geometry, the resulting set of coupled nonlinear equations for solidification in each layer is numerically integrated in time to obtain the struct.
Synthesis of methyl glucoside stearate and methyl glucoside stearate polyoxypropylene ether

Methyl glucoside stearate(SS) was synthesized starting from α-Methyl glucoside and stearic acid methyl ester using K2CO3 and TBAC as catalyst under solvent-free.Epoxy propane was added by SS,then get at methyl glucoside stearate polyoxypropylene ether(SSP). The products was characterized by IR.The possible reaction mechanism was discussed.It was studied that yield of the reaction can be changed with reaction factors such as molar ratio of Methyl glucoside and stearic acid methyl ester,the kind and the amount of catalyst,reaction temperature,reaction time.It was found that the optimal experimental conditions are as follows:n(α-Methyl glucoside) :n(stearic acid methyl ester)=0.71 :1,w(K2CO3) :w(stearic acid methyl ester)= 0.04∶1,w(TBAC) :w(stearic acid methyl ester)= 0.05∶1,reaction temperature was 145 ℃,reaction time was 4.5h and pressure was 6 kPa.The yield of SS can reach up to 92%.
Effect of fluorination of silica support on initiation of ethylene polymerization during induction period over Phillips catalyst

In spite of great importance of Phillips CrOx/SiO2 catalyst for commercial polyethylene production and long term research efforts,polymerization mechanism,especially initiation mechanism,still remains unclear.The effect of surface fluorination of silica support on initiation of ethylene polymerization during induction period over Phillips catalyst adsorbed with different amounts of formaldehyde molecules was investigated with the density functional theory.It was demonstrated that no reaction could be initiated over cluster models adsorbed with two formaldehyde molecules on account of steric hindrance.For cluster models adsorbed with one formaldehyde molecule,ethylene dimerization to 1-butene and metathesis to propylene took place via chromacyclopentane intermediate,and fluorination of silica support showed minor influence on both reactions.After a complete desorption of formaldehyde molecules,further ring expansion to chromacycloheptane occurred and surface fluorination of silica support showed improvement on this process.Fluorination of silica support was unfavorable to ring-opening of chromacycloheptane to give 1-hexene.It was also demonstrated that fluorination showed positive effect on chain propagation over models of CrⅢ-alkyl active sites during ethylene polymerization.
Decomposition of triphenylbismuth dicrotonate in light in the presence of 2-methyl-2-nitrosopropane

Triphenylbismuth dicrotonate Ph3Bi(O2CCH=CHCH3)2 in benzene solution in the presence of 2-methyl-2-nitrosopropane decomposes in light. The phenyl radicals formed as the result of Ph3Bi(O2CCH=CHCH3)2 decomposition are confirmed by the spin-trapping method; they can initiate the methylmethacrylate polymerization at room temperature. In the absence of light the decomposition has not been observed. Кeywords: electron paramagnetic resonance, triphenylbismuth dicrotonate, 2-methyl-2nitrosopropane.
Modeling information diffusion on microblog networks based on users' behaviors

Online social networks, such as Facebook, Twitter and YouTube, play a vital role in information sharing and diffusion, and recently many dynamics models on social networks have been proposed to model information diffusion. However most models are theoretical, their parameters do not come from realistic data and their validity and reliability have not been evaluated empirically. In the paper we first analyze the users' behaviors of reading and reposting microblog in Sina Weibo, a Twitter-like website in China, and find that users' number of fans, the average reposted number of users' microblog, the intensity of users' interaction and the similarity between microblog topics and users' topic interests can significantly influence reposting behavior. Then we propose an information diffusion model Susceptible-Infected-Recovered based on Users' Behaviors (SIRUB) on microblog networks, compute the users' probability of reading microblog in the model according to the probability of their logging on microblog in a day, and obtain the reposting probability utilizing the logistic regression which considers 16 possible factors influencing users' reposting behavior. The 16 factors can be divided into three categories: the characteristics of microblog publishers, microblog text features and social relationship characteristics. We utilize the beginning 2/3 microblog data to obtain model parameters and logistic regression coefficients, and the remaining 1/3 data to examine the validity of the model. The experiments on Sina Weibo network show that the model can predict users' reposting behavior accurately only when it considers both reading and reposting probabilities. F-score which considers precision and recall is used to assess prediction effect of the model. The highest F-score for the prediction of SIRUB model on users' reposting behavior is 0.228 which is much larger than those of classical Susceptible-Infected-Recovered (SIR, F-score=0.039) and Susceptible-Infected-Contacted-Recovered (SICR, F-score=0.037) models. The prediction on the spreading scope of microblog for SIR and SICR models is related with users' number of fans while for SIRUB model not. For SIRUB model the mean and standard deviation of the errors of prediction on spreading scope are smaller than those of SIR and SICR models. These results indicate that users' behaviors of reading and reposting microblog should be appropriately taken in account when modeling information diffusion on microblog networks, and that, in general, the prediction performance of the data-driven SIRUB model proposed in the paper is better than those of SIR and SICR models regardless of the prediction of users' reposting behavior or diffusion scope of microblog.
Surface Modification for Nano-ZnO and Its Mechanism

Nano-ZnO was synthesized by an improved direct precipitation method, followed characterization by both of XRD and TEM. It demonstrates that the diameter of nano particles is 10nm calculated with Scherrer formulate and observed with the photo of TEM. The nano particles were modified with oleic acid, span-60 and sodium laurate, respectively. Macroscopically, the stability of the nano particles was analyzed by the subsidence experiment and discussed the stability of the modified nano-ZnO by the three surfactants. The effect of modification with oleic acid is excellent and the others can not exist in liquid paraffin stably. Microcosmically, the FT-IR spectra indicate that nano particles combine with oleic acid by both types of covalent bond and hydrogen bond to form a singlemolecule layer, but the modification with span-60 and sodium laurate is not stable.
18: Mobile App Learning Lounge

Twenty-first-century learning is increasingly defined by the use of mobile devices and applications. Centers for teaching and learning can help faculty and students acquire greater familiarity and fluency with just-in-time learning using mobile apps by creating informal, inviting, and informative learning spaces on their campuses. This chapter features the Mobile App Learning Lounge (MALL), a low-cost, highimpact initiative of a center for teaching and learning at a California research university. Beyond sharing how MALL works, this chapter offers practical suggestions and strategies for replicating a similar initiative at other institutions.