cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.14457/cu.the.2012.247
title: Method development for determination of homocysteine by electrochemiluminescence of quantum dots

description: In this research, a novel analytical method based on electrochemiluminescence (ECL) of CdTe quantum dots (QDs) using carbon nanotube (CNT)-modified screen-printed carbon electrodes (SPCNTEs) was developed. It was found that the SPCNTEs could greatly enhance the ECL intensity of CdTe QDs dispersed in aqueous solution. Thus, SPCNTEs would have a great merit to expand the application of QD ECL. The thioglycolic acid (TGA)-capped CdTe QDs used in ECL procedure based on the SPCNTEs were synthesized and characterized by UV–visible spectroscopy, photoluminescence spectroscopy, transmission electron microscopy, and infrared spectroscopy. From the charaterizations, the average size of TGA-capped CdTe QDs was approximately 2.53 nm, which considered close to the diameter of 2.47 nm resulting from the calculations using UV-visible absorption spectra of the QDs. Moreover, the concentration of synthezied TGA-CdTe QDs was found to be 7.39 x 10-3 M. Influences of some factors on the ECL intensity were investigated to determine homocysteine (Hcy) based on the quenching effect of CdTe QDs ECL. Under the optimal conditions, the ECL intensity has a linear relationship with the concentration of Hcy in the range of 5 to 35 μM with the limit of detection of 0.011 μM. This proposed method was successfully applied to determine Hcy in human urine and artificial urine samples.
DOI: 10.17632/4ff9cphcgc.1
title: la primera guerra mundial

description: RESUMEN
DOI: 10.17632/8p4brg9wr2.1
title: Influence of Stone-Wales Defect on Graphene Friction: Pinning Effect and Wrinkle Modification

description: We upload the LAMMPS input files used to produce the findings in Influence of Stone-Wales Defect on Graphene Friction: Pinning Effect and Wrinkle Modification. These files are stored in each "in" folders. These data can be reproduced by redoing the simulation in LAMMPS. We indicate the direction and load in the names of the folders. 0d means sliding process along the x-axis and 90d means sliding along the y-axis. The load is shown by "_xl", for example, 200l means a simulation with a load of 200 nN. The folders begin with sw means simulations with a SW defect in the middle. The folders begin with p means simulations on pristine graphene. If someone do the simulations, among the output files, files end with "_sliding" contain data about the whole tip. Files with other endings contain data about atoms in different parts, including the single-layer graphene, the tip, the top layer of the substrate and the bottom layer of the substrate. Gr means graphene while tip means tip atoms. We plot the lateral force of the spring according to the data in all the "_sliding" files. There are several peaks that draws our attention and we analyze the force of tip and graphene atoms at these moments by using the data in "_tipsliding" and "_grsliding" files. The pinning effect is found by comparing the force of tip atoms in defective and pristine simulations. The wrinkle modification effect is found when we compare the position of graphene atoms at the abnormal peak. The output data is too large to be all uploaded. As we mainly analyze the simulation results along x-axis with a normal load of 100 nN, the results of this simulation, defective and pristine, are uploaded.
DOI: 10.17632/8p4brg9wr2.2
title: Influence of Stone-Wales Defect on Graphene Friction: Pinning Effect and Wrinkle Modification

description: We upload the LAMMPS input files used to produce the findings in Influence of Stone-Wales Defect on Graphene Friction: Pinning Effect and Wrinkle Modification. These files are stored in each "in" folders. These data can be reproduced by redoing the simulation in LAMMPS. We indicate the direction and load in the names of the folders. 0d means sliding process along the x-axis and 90d means sliding along the y-axis. The load is shown by "_xl", for example, 200l means a simulation with a load of 200 nN. The folders begin with sw means simulations with a SW defect in the middle. The folders begin with p means simulations on pristine graphene. If someone do the simulations, among the output files, files end with "_sliding" contain data about the whole tip. Files with other endings contain data about atoms in different parts, including the single-layer graphene, the tip, the top layer of the substrate and the bottom layer of the substrate. Gr means graphene while tip means tip atoms. We plot the lateral force of the spring according to the data in all the "_sliding" files. There are several peaks that draws our attention and we analyze the force of tip and graphene atoms at these moments by using the data in "_tipsliding" and "_grsliding" files. The pinning effect is found by comparing the force of tip atoms in defective and pristine simulations. The wrinkle modification effect is found when we compare the position of graphene atoms at the abnormal peak. The output data is too large to be all uploaded. As we mainly analyze the simulation results along x-axis with a normal load of 100 nN, the results of this simulation, defective and pristine, are uploaded.
DOI: 10.17632/b4gcgybvt6.3
title: CluSPT Instances

description: + The tested data for Clustered Shortest-Path Tree Problem. + The tested data were created based on the MOM of the Clustered Traveling Salesman Problem (https://www.sciencedirect.com/science/article/pii/S0305054812002122) + Get from: D:\OneDrive - moet.edu.vn\MyData\Read\Source code\10. MFO\W. Benchmarks\04.Clustered_Tree_Instance_From_Clustered_TSP\Instances\Clustered_Tree_instances\MOM_Lib
DOI: 10.17632/mnd9nknzvf.1
title: Appendix B: Clumped Isotopes

description: Clumped Isotopes data from (i) Western Canada Basin; (ii) Essaouira-Agadir Basin, Morocco; (iii) Southern Pennine Basin, UK
DOI: 10.14457/cu.the.2012.248
title: Antimicrobial activity of Phyllanthus Emblica fruit extract and its cosmetic application

description: Fruit extract from Phyllanthus emblica L., a native plant in Thailand, possesses several biological activities including antimicrobial and antityrosiness activities. Development of a cosmetic product containing emblica fruit extract is not only increase economic values of this native plant but also provides an alternative choice of natural anti-acne product for consumers. In this study, fruit extract powder from two different sources, a commercially available emblica extract and an in-house emblica extract (ESDE), was extracted with acetone, methanol and ethyl acetate. The marc from ethyl acetate was sequentially extracted with acetone and methanol. Each fraction was characterized for their antimicrobial activities (such as MIC) and their chemical constituents. The phenolic compounds, mainly gallic acid, present in each fraction was evaluated using HPLC technique and the Folin-Ciocalteu reagent. Gel containing ESDE was developed in the presence of sodium metabisulfite, sodium benzoate, and citrate buffer pH 3.0. The gel containing ESDE was further evaluated for its physical and chemical stability at 30 ± 2 ℃, 75 ± 5 %RH for 1 month. Finally, the anti-acne efficacy of the gel containing ESDE was evaluated on 25 patients. ESDE and its fractions contained more phenolic content (15.77-29.92%, w/w) than the commercially available emblica extract and its fractions. MIC of ESDE was 10 mg/mL while other fractions did not show obvious antibacterial activities against S. aureus ATCC 25923 and 29 clinical isolates due to their limited water solubility. Further analysis of data from previous study of the peak area and time profile of ESDE in citrate buffer pH 3.0 stored at 30 ± 2 ℃ for 1 month showed the increment of gallic acid and peak no.1, the decrement of peak no.2, 5 and 6 and the consistent of peak no.3. Interestingly, peak no.6 decreased dramatically within a week and the observed inhibition zone against S. aureus was also decreased. Gel containing emblica extract (GCE) was translucent with yellow color. The color was change from yellow to brown within 1 week and eventually dark brown within 1 month. During 1 month storage at ± 2 ℃ and 75 ± 5 % RH, the pH was observed to be 3.24 + 0.06, the viscosity changed from 1238 + 75.60 to 1040 + 21.79 cP and gallic acid content increased from 0.06 to 0.09 % w/w. The peak area and time profile of GCE was similar to that of ESDE in citrate buffer. GCE was tested its anti-acne efficacy for 1 month and 1% clindamycin gel was used as a positive control. The individual acne reduction from week 0 to week 4 was significantly different, p&lt;0.05. At the end of each week, mean acne reduction between two groups was not different, p&gt;0.05.
DOI: 10.14457/cu.the.2012.249
title: The comparison of implant stability between two implant surfaces using the resonance frequency analysis measurement : randomized controlled trial

description: Objective to observe the longitudinally changes in the stability of implants with 2 different surface chemistries by using Resonance Frequency Analysis (RFA) over the first 8 weeks and to determine the functional loading protocol for implants with the SLA and SLActive, placed by experienced surgeons. Materials and methods Thirty patients were randomized into 2 groups. The first group (n = 25) received Straumann SLA implants while the second group (n = 26) received Straumann SLActive implants. Cone Beam Computed Tomography Scan was used to determine the bone quantity and quality. Healed ridge with &lt; 6 months postextraction or ridge that failed to accommodate the primary stability of 20 Ncm were excluded. Each RFA measurement was performed at the buccal, lingual, and mesial side on day 0, 2, week 1, 2, 3, 4 and 8. The mean value of measurements was represented the Implant Stability Quotient (ISQ) of the particular point in time. The relationships between ISQ values and the implant surface or the bone quality were statistically analyzed. Result Regarding the implant surface, both implant surfaces showed dramatically decrease of ISQ values at day 2 and stayed at the same level until week 3. The SLActive surface showed a significant increase in ISQ values (P
DOI: 10.14457/cu.the.2012.250
title: Membrane electrodes and optodes performing allosteric recognition of ions

description: New polyvinyl chloride (PVC) membrane electrodes which show allosteric ion recognition between F- and Na+ were proposed and fabricated. The membranes incorporating phenylboronic acid as a precursor for anionic sites, F- as an effector to generate anionic site and NaX ionophore as a receptor for Na+ ions in DOS-plasticized PVC were fabricated. The study was initially relied on optode experiments. The optode membrane was prepared to study the interaction of phenylboronic acid and F- in the membrane phase using UV-Vis spectroscopy. The result showed that phenylboronic could form complex with F-, and the membrane responded to F- at concentration as low as 10-8 M. Moreover, potentiometry was used to ¬study the response of the membrane towards Na+. DOS-plasticized PVC membranes containing p-tert-butylcalix[4]arene-tetraacetic acid tetraethyl ester (NaX) and 4-[(4-tert-butyl-2-methylphenoxy)methyl]phenylboronic acid (50% mol compared to NaX) were found to give the best characteristic of Na-ISEs upon conditioning the membranes in 10-2 M NaF: a response slope of 57.48 mV per decade and detection limit of 7.42×10-7 M. Potentiometric responses of Na-ISEs were found to depend largely on membrane resistances (Rm) varied with concentrations of fluoride ions used in membrane conditioning steps. Electrochemical impedance spectra showed a linear relationship between Rm and concentration range of NaF (1×10-1–1×10-8 M). Conditioning optimal membranes with various concentrations of Bu4NF gave a non-linear relationship. The proposed allosteric membrane electrode, thus, showed permselectivity toward Na+ using F- as an effector. The results can be potentially used for detection of low concentration of F- in aqueous solution.
DOI: 10.14457/cu.the.2012.251
title: Development of dispersive liquid-liquid microextraction using an auxiliary solvent for determination of organophosphorus and organochlorine residues

description: Dispersive liquid-liquid microextraction (DLLME) using a low-density organic solvent as an extraction solvent was developed for simultaneous determination of organophosphorus and organochlorine pesticides. A high-density organic solvent as an auxiliary solvent was used for adjusting the density of a low-density organic solvent as an extraction solvent. As a result, the density of mixed solvent was higher than water and a phase separation by centrifugation and recovery of the extract were simplified. In this work, enrichment factor and extraction recoveries were optimized when using 40 µL of a mixture of n-heptane as extraction solvent and tetrachloroethylene as auxiliary solvent (ratio 1:3) and 1.4 mL of acetonitrile as a disperser solvent. The mixed solution was injected into 5 mL of aqueous sample by syringe, rapidly forming a cloudy solution. After centrifugation, the sediment phase at the bottom was removed by microsyringe and directly analyzed by gas chromatography-mass spectrometry. For method validation, the extraction recoveries for 5.0 µg/L of pesticides were in the range of 40.7 – 90.5 % and relative standard deviations were between 6.6 and 10.6% (n=6). The limits of detections for the method were range from 0.3 to 1.2 µg/L. The enrichment factors were in the range of 89 – 198. The developed method was then applied for determination of pesticide residues in water and tomato sample. The proposed method is simple, cheap, rapid, high enrichment factor and reduced the use of toxic solvent in conventional DLLME, which is environmental friendly.
DOI: 10.14457/cu.the.2012.252
title: Transglycosylation reaction of cyclodextrin glycosyltransferase from Paenibacillus sp. RB01 for the synthesis of medium-chain alkyl glycosides

description: Alkyl glycosides belong to the group of non–ionic surfactant. They were synthesized by transglycosylation reaction from β–cyclodextrin donor to alcohol acceptors using cyclodextrin glycosyltransferase (CGTase) from Paenibacillus sp. RB01 as a catalyst. The effect of alcohol acceptors on enzyme was determined by phenolphthalein method. The results showed that alcohol had effect on enzyme to some extent. The reaction performed as two phase system had lower influence to enzyme. However, the yield of transglycosylation products was also found to be lower. In the group of medium chain alcohol acceptor, isobutanol gave the highest yield while β–CD was reported as an appropriate donor. The results obtained after treatment the products with glucoamylase and α–glucosidase could be preliminary summarized that the products were both isobutyl monoglucoside and isobutyl (poly)glucoside with α 1, 4–linkage. The suitable condition was to incubate 5% (v/v) of isobutanol with 1.2 % (w/v) β–CD in 0.5 M acetate buffer pH 6.0 with enzyme 450 units/mL for 48 hours. The three main products were observed at Rt~7, 8 and 9 min by HPLC analysis. PLC was employed to isolate the expected products at indicated Rf values to confirm by mass relationship. The molecular weight of product at Rf = 0.74 (Rt~9 min) and Rf = 0.56 (Rt~8 min) were 259.1 and 421.2 g/mol, respectively. Thus, they were isobutyl–α–monoglucoside and isobutyl–α–maltoside, respectively. Reaction was then prepared in larger scale and purified by Amberlite IRA–900 column chromatography. The two purified products were checked for the emulsification properties using n–hexadecane forming–emulsion. The results revealed that isobutyl–α–monoglucoside had emulsification activity of 11.4% while isobutyl–α–maltoside had 41.1% of triton X–100. The emulsification stability of both products was more than 80 %.
DOI: 10.14457/cu.the.2012.253
title: Synthesis of pour point depressant from dicarboxylic acid for biodiesel from soybean oil and palm oil

description: The purpose of this research is to synthesize pour point depressants (PPDs) from dicarboxylic acids for improving cold flow properties of soybean methyl ester (SME) and palm methyl ester (PME). The 16 types of PPDs (dimethyl succinate (DMS), dimethyl adipate (DMAD), dimethyl azelate (DMAZ), dimethyl phthalate (DMP), diisopropyl succinate (DIS), diisopropyl adipate (DIAD), diisopropyl azelate (DIAZ), diisopropyl phthalate (DIP), di 2-butyl succinate (DBS), di 2-butyl adipate (DBAD), di 2-butyl azelate (DBAZ), di 2-butyl phthalate (DBP), di 2-ethyl hexyl succinate (DES), di 2-ethyl hexyl adipate (DEAD), di 2-ethyl hexyl azelate (DEAZ) and di 2-ethyl hexyl phthalate (DEP)) were synthesized by esterification reaction. Their structures were characterized by FT-IR and 1H-NMR techniques. The cloud point (CP) and pour point (PP) of SME and PME were improved by addition of PPDs at 10,000, 100,000, and 300,000 ppm. At 300,000 ppm, could point and pour point of both biodiesels were reduced in the range of 2.70±1.0 °C to 6.00±1.0 °C and 2.00±1.0 °C to 6.00±1.0 °C. 2-Butyl esters gave good results on improving flow property of both SME and PME. Moreover, the results indicated that DBAZ was the most effective when compared with other PPDs, due to branch substituent (2-butyl) in its structure. At 300,000 ppm of DBAZ, the CP and PP of SME were reduced by 5.15±1.0 °C and 5.40±1.0 °C while the CP and PP of PME were reduced 6.00 ±1.0 °C in both CP and PP.
DOI: 10.14457/cu.the.2012.254
title: Synthesis of p-cumylphenoxy-1,8-naphthalimide derivatives as brighteners

description: A series of 4-alkoxy or 4-aryloxy-N-aryl-1,8-naphthalimides were synthesized and evaluated for their optical properties as well as thermal and photo stabilities. The synthesis began with the imidation of the commercially available 4-bromo-1,8-naphthalic anhydride with various aniline derivatives. Substitution of the bromine with phenol or aliphatic alcohol provided the target molecules in good yields. All compounds had absorption wavelengths around 364-368 nm and emission wavelengths of 425-436 nm, which were desirable properties for optical brightening agents (OBA). In comparison with the commercially available OBA - Tinopal - their photostability were closely similar but their thermal stabilities are more superior and could significantly be improved by substitution at the 4-position with a cumylphenoxy group. In this research, it was found that their quantum efficiencies were exclusively dependent on the substituents at the 4-position. Compounds with alkoxy and phenoxy groups exhibited high quantum efficiencies whereas those compounds with substituted aryloxy groups showed lower quantum efficiencies. It is postulated that the electronic effect of the substituents on the 4-aryloxy groups influences the photo-induced electron transfer (PET) process, which causes variations in fluorescence signal.
DOI: 10.14457/cu.the.2012.255
title: Fabrication of paper-based devices by spraying with lacquer for the determination of nickel

description: A spraying method with lacquer was developed for the fabrication of paper-based devices. A patterned iron mask was initially placed on a filter paper and held tightly by a magnetic plate placed on the opposite side. After that, acrylic lacquer was sprayed on the filter paper to create hydrophobic area while the hydrophilic area was protected with the iron mask. The optimal conditions for the fabrication of this device were studied including lacquer type and particle retention efficiency of filter paper. Gloss spray lacquer and filter paper No.4 were chosen as optimal lacquer type and particle retention efficiency of filter paper, respectively. To evaluate its efficiency, the paper-based devices were used to determine nickel using electrochemical detection. Cu-enhancer solution was employed to increase sensitivity of nickel determination with the optimal concentration of 4.5 ppm. Under the optimal conditions, linear range was observed in the range of 1 to 50 ppm with a correlation coefficient of 0.9971. The limit of detection (LOD) and the limit of quantitation (LOQ) were found to be 0.5 and 1.97 ppm, respectively. Moreover, these paper-based devices coupled with electrochemical detection were applied to determine nickel in waste water from jewelry factory and compared to those obtained with inductively coupled plasma optical emission spectrometry (ICP-OES). The results indicated that there were no significant variations between this proposed method (4.15±0.043 ppm) and ICP-OES method (4.06±0.013 ppm). Therefore, this spraying method was found to be an excellent alternative for the fabrication of paper-based devices due to its ease of use, low cost and rapidness.
DOI: 10.17632/79fdpwbtj7.1
title: Glyphosate but not Roundup harm earthworms

description: Dependent variables for worms include: body mass, stress-test survival time, and mortality. Dependent variables for microbes include: microbe biomass, fungal biomass, the difference between initial and final biomass for microbes and fungus. Independent variables include treatment: exposure to Roundup Ready to Use, Roundup Superconcentrate, pure glyphosate, and nothing. Additional variables include tank number. Each treatment had three replicates and those are reflected in tank number.
DOI: 10.17632/n77bhwyp3y.1
title: Price, Investment and Leasing Data for the British Columbia ITQ Halibut Fishery

description: The data that is presented here was aggregated and consolidated to inform the research presented in the dissertation (under review) Edwards, D., Addressing Questions on the Social and Economic Outcomes of an Individual Transferable Quota Fishery, A dissertation to be submitted in partial fulfillment of the requirements for the degree of doctor of philosophy, University of British Columbia and in the paper Edwards, D., & Pinkerton, E. (2019), The Hidden Role of Processors in an Individual Transferable Quota Fishery. Ecology and Society, In Press. This document describes the sources and methodology used for these data inputs. The source data is provided in accompanying files. The data sources presented here are all publicly available, compiled from multiple sources including published reports, online datasets, a government pay for access dataset (BC Online corporate registry), and government data requests (through the federal Access to Information process). A file providing additional background on the data presented, including data sources, is included.
DOI: 10.17632/pwdmm7843d.3
title: Data for: Impact evaluation and conservation outcomes in marine protected areas: a case study of the Great Barrier Reef Marine Park.

description: Appendix data associated with the biological impact of the Great Barrier Reef Marine Park. Spreadsheet includes studies that have compared outcomes in no-take zones within the Marine Park, with fished areas. Includes evaluation data for how studies conducted within the Marine Park adhered to 6 key principles of impact evaluation.
DOI: 10.17632/tdjng4znxj.1
title: Correlation between increasing Internet access in Brazil in the periods 2005–2011 and 2008–2013 with users interests, as indicated by their actual Internet search behaviours per state, according to Google Trends data

description: This study investigates how Brazilian users interests, as indicated by their actual Internet search behaviours, evolved with their increasing familiarity with the Internet. Changes in the number of people who accessed the Internet in each state, as provided by Brazilian Institute of Geography and Statistics (IBGE) data, were correlated with the corresponding changes of the rates of their Internet searches in Brazil for the terms ‘Biologia’ (Biology), ‘Química’ (Chemistry), ‘Matemática’ (Mathematics), ‘Globo’ (The dominant Brazilian free-to-air television network), and ‘jogos’ (games) in the periods 2005–2011, as provided by downloaded GT data. A correlation coefficient value near +1 indicates that the rate of Internet searches for a given term raised along with the increasing Internet access in that state during that period; contrariwise, a correlation coefficient value near -1 indicates that the rate of Internet searches for that term decreased in that period.