bluuebunny/crossref_metadata_2025_split huggingface dataset:
Modified flower-like nickel oxide on carbon paste electrode (CPE) for analysis cholesterol based on non-enzymatic sensor
Authors: Suropati R T L , Wibowo R , Nurani D A , Krisnandi Y K 
Published: April 2020

Abstract
The increasing circulation of unhealthy foods in various places threatens the community of malnutrition. One of which is the intake of cholesterol nutrition. When the normal limit is exceeded, it can trigger the spread of various diseases such as coronary heart disease. To anticipate the outbreak of the disease, a practical, stable, simple, and relatively inexpensive, non-enzymatic sensor device for monitoring blood cholesterol levels in some food samples such as milk and meat was developed. In this research, nickel modified catalyst on carbon paste electrodes, NiO/CPE by hydrothermal method and Ni/CPE by electrochemical method were developed. A flower-like morphology for NiO was obtained from hydrothermal method and rock-like morphology was obtained from nickel deposit. Results showed that Ni/CPE worked optimally at pH 14 with sensitivity of 0.8148 μA μM−1 cm−2 and limit of detection (LoD) of 0.1645 μM, while NiO/CPE worked optimally at pH 12 with a sensitivity of 0.1238 μA μM−1 cm−2 and LoD of 0.7804 μM. Cholesterol level measurement from the packaged milk sample showed differences of 20.42 % and 47.18 % from the nutrition table information for Ni/CPE and NiO/CPE, respectively.
Arsenic and arsenate detection with anodic stripping voltammetry technique using boron-doped diamond modified by platinum
Authors: Sitorus R , Saefumillah A , Ivandini T A 
Published: April 2020

Abstract
High homogeneity and stability of platinum particles modified at boron-doped diamond (BDD) electrode was successfully performed using chemical seeding, followed by electrodeposition technique. The platinum particles on the surface of BDD characterized using Scanning Electron Microscopy-Energy Dispersive X-Ray Spectroscopy (SEM-EDS) showed that the coverage of Pt particles was 1.54 % on the BDD surface. These modified electrodes were used for As3+ and As5+ sensors using the anodic stripping voltammetry technique in 0.1 M phosphate buffer solution pH 6. Prior to the detection, pretreatment was required by the addition of 0.1 M NaBH4 to change As5+ to As3+. The optimum parameters were at a deposition potential of -500 mV, a deposition time of 150 s, and a scan rate of 200 mV/s. The voltammograms were linear for As3+ and As5+ (R2 = 0.9797 and 0.9903, respectively) in the concentration range of 0 to 100 ppb. Estimated detection limits of 16.50 and 8.19 ppb for AS3+ and As5+ were achieved, respectively, suggesting that the method is promising for the specification detection of As3+ and As5+.
Synthesis of impregnated Ni(0) zeolite ZSM-5 as catalyst for carboxylation reaction of acetylene with CO2
Authors: Mujiantono F , Abdullah I , Krisnandi Y K 
Published: April 2020

Abstract
Conversion of carbon dioxide (CO2) into other compounds has become very advantageous because of the abundance in the atmosphere. However, carbon dioxide (CO2) is thermodynamically and kinetically stable so it needs low valence metal such as Ni(0) to be activated and react with other compounds. In this study, nickel metal-impregnated ZSM-5 was prepared as heterogeneous catalyst for carboxylation reaction of acetylene with carbon dioxide. Microporous and hierarchical ZSM-5 were synthesized using single template and double template, respectively. X-Ray Diffraction (XRD) characterization results show that ZSM-5 material with high crytallinity was successfully synthesized. Scanning Electron Microscopy (SEM) images show ZSM-5 has hexagonal coffin-like morphology. Brunauer-Emmett-Teller (BET) surface area analysis proves that the ZSM-5 has combination of micro and meso-sized pores (hierarchical pores). The elemental analysis using Atomic Absorption Spectroscopy (AAS) gives nickel content of 1.9 % in microporous ZSM-5 and 2.1 % in hierarchical ZSM-5. HPLC analysis show new peak is observed at retention time of 3.6 minutes for carboxylation reaction of acetylene (CO2: acetylene of 0.2:0.8) with optimum condition at 12 h and 80 °C when using microporous Ni/ZSM-5 or hierarchical counterpart as catalyst.
Crude glycerol from waste cooking oil treatment as an alternative solvent in synthesis of diethyl-2,6-dimethyl-4-phenyl-1,4-dihydropyridine-3,5-dicarboxylate
Authors: Cahyana A H , Ardiansah B , Hanifah H 
Published: April 2020

Abstract
Diethyl-2,6-dimethyl-4-phenyl-1,4-dihydropyridine-3,5-dicarboxylate, a 1,4-DHP derivative, has been synthesized from benzaldehyde, ethyl acetoacetate and ammonium acetate via a one-pot three component reaction in crude glycerol as solvent. Crude glycerol was obtained from the treatment of waste cooking oil. The product was obtained in 69 % yield when the reaction was conducted at 90 °C for 1 h under reflux in 10 mL glycerol.
Modification of boron-doped diamond with gold through wet-chemical seeding and electrodeposition techniques for the application of acrylamide biosensor
Authors: Anggraini L E , Saepudin E , Ivandini T A 
Published: April 2020

Abstract
Acrylamide is known as carcinogenic and neurotoxin substrates. An alternative method for acrylamide detection is by using hemoglobin-based biosensors as it can provide a simple, rapid, and sensitive method. In this research, the electrodes for biosensor of acrylamide were prepared by modifying boron-doped diamond (BDD) with gold and hemoglobin (Hb). Wet-chemical seeding followed by electrochemical overgrowth of seeds technique was performed to modify the BDD electrodes with gold. The characterization with Scanning Electron Microscopy-Energy Dispersive Spectroscopy X-Ray (SEM-EDS) showed the gold coverage of 12.74 % on the BDD surface. The gold-modified BDD was then modified with 0.25 mM Hb. The prepared sensor can be successfully applied in the concentration range of acrylamide from 0.6 to 6 μM with high linearity (R2 = 0.9901) and an estimated limit of detection of 0.845 μM.
Synthesis of impregnated nickel-mesoporous carbon and its application for reaction of acetylene with carbon dioxide
Authors: Kawigraha A D H , Krisnandi Y K , Abdullah I 
Published: April 2020

Abstract
Mesoporous carbon has been synthesized using soft-template method with phloroglucinol as carbon precursor and pluronic F127 as a template to form mesosize pores in carbon structure. The Brunauer-Emmett-Teller (BET) results prove the existence of hysteresis loop and adsorption isotherm type IV with total surface area of 432.498 m2/g and pore diameter of 7.46 nm. The mesoporous carbon was then impregnated with various amount of nickel metal using Ni(NO3)2 as precursor, followed by four ways of reduction: (1) with ethylene glycol in aqueous solution; (2) with ethylene glycol in 98 % ethanol in water; (3) with NaBH4; and (4) with H2 gas. Energy Dispersive X-Ray (EDX) analysis shows that nickel content in materials after reduction were (1) 34.48 %, (2) 0.02 %, (3) 0.9 % and (4) 1.73 %, in respective to the reduction methods. X-Ray Diffraction (XRD) patterns of mesoporous carbon reduced with NaBH4 and H2 show no change in mesoporous carbon structure, especially for peak at 2θ of 24.44° and 43.18°. After impregnation, the materials were further tested for their catalytic activity for acetylene reactions with CO2. The reactions were conducted in a 100 mL batch reactor with a pressure ratio of acetylene to CO2 of 0.2:0.8. Some reaction conditions were examined to determine the effect on the reaction: reaction time (3, 6, 12) h and reaction temperature (25, 40 and 80) °C. Product analysis using High Performance Liquid Chromatography (HPLC) shows that new peak appears at retention time of 3.625 minutes. The optimum condition was obtained at 25 °C and 3 hours.
Facile synthesis and growth mechanism of mesoporous anatase titanium dioxide nanoparticles via sol-gel method
Authors: Rahmaningsih G , Gunlazuardi J , Khalil M 
Published: April 2020

Abstract
An investigation on the synthesis of highly monodispersed mesoporous anatase titanium dioxide (TiO2) nanoparticles has been reported in this work. The mesoporous nanoparticles were obtained by a facile sol-gel method where titanium isopropoxide (TTIP) was used as the titanium precursor in basic solution. Here, the effect of reaction time was studied to study the growing mechanism of TiO2 nanocrystal. The as-synthesized nanoparticles were characterized with X-Ray Diffraction (XRD), Fourier Transform Infrared (FTIR), Brunauer-Emmett-Teller (BET) Surface Area Analyzer, and High Resolution Tunneling Electron Microscopy (HR-TEM). Based on the result, it is found that a highly monodispersed mesoporous anatase TiO2 nanoparticles with large surface area could successfully be synthesized. It is also believed that the morphology of as-synthesized particles could easily be controlled by the reaction time. Results show that uniform mesoporous TiO2 nanoparticles with perfect spherical morphology could be obtained when the reaction was performed in 3 hours of reaction time.
Superabsorbent nanocomposite as micronutrient slow-release fertilizer
Authors: Helmiyati H , Nugraha D 
Published: April 2020

Abstract
In this research, sodium alginate grafted by poly(acrylate-co-acrylamide) loaded montmorillonite (MMT) and the addition of boric acid as micronutrients into the superabsorbent nanocomposite through in-situ method have been successfully synthesized. We developed superabsorbent nanocomposite with montmorillonite obtained by increasing the amount of montmorolite, which would increase the swelling capacity and by adding boric acid micronutrients will also increase water swelling capacity. The best swelling capacity to water of superabsorbent nanocomposite obtained 426.337 g/g that formulated with MMT contents approximately 20.0 % wt and 0.1 g boric acid. The optimal release capacity of boric acid is 25.561 % for 8000 min or about 6 days. This is supported by the study of kinetics for the water swelling in pseudo second-order while the boric acid release is pseudo first-order obtained. The nanocomposite superabsorbents that are successfully synthesized show that the release of boric acid micronutrients as slow release can be controlled and denoted interesting materials to be applied in agriculture.
Synergistic effect of magnetite and carbonous materials incorporated with iron (III)-doped ZnO on the photodegradation of organic dyes
Authors: Pratiwi M I , Saleh R 
Published: April 2020

Abstract
Fe-doped ZnO (Fe:ZnO) was combined with both magnetite (Fe3O4) and carbonous materials (graphene) using a co-precipitation method to form Fe:ZnO/G/Fe3O4 nanocomposites with various weight ratios (1:0, 1:0.05, 1:0.1, 1:0.3, 1:0.5, and 1:1). These nanocomposites were characterized using different methods of measurements; such as Fourier transform infrared spectroscopy to record the absorption spectra of certain functional groups, X-ray diffraction spectroscopy to identify the structure of the samples, and thermogravimetric analysis to study the loss in samples’ weight under increasing temperature. The magnetite and carbonous materials were used to support Fe:ZnO in the photodegradation of methylene blue dye, as a representation of organic dyes. The photocatalytic activity was examined under ultra violet (UV) light irradiation. The effects of Fe:ZnO/G:Fe3O4 ratio, scavenger addition, and catalyst dosage on the photocatalytic activity were also studied. Finally, the reusability of the catalyst was examined and proved.
Efficient photo-, sono-, and sonophoto-fenton-like degradation of the organic pollutant methylene blue using a BiFeO3/graphene composite
Authors: Susanti Y D , Saleh R 
Published: April 2020

Abstract
In this study, we investigated the degradation of the organic pollutant methylene blue (MB) using photo-, sono-, and sonophoto-fenton processes under visible light, ultrasonic irradiation, and a combination of the two, respectively, in the presence of an iron-containing perovskite catalyst BiFeO3/graphene composite. The sample structure was characterized using X-ray diffraction; thermal analyses were performed using thermogravimetric analysis and differential thermal analysis; and the BiFeO3/graphene composite was prepared using a hydrothermal method. We observed better MB degradation via the BiFeO3/graphene composite using the sonophoto-fenton method relative to either the photo- or sono-fenton methods, with increased MB degradation occurring through the synergistic effects of both the photo- and sono-fenton techniques. Furthermore, addition of a chelating agent, such as ascorbic acid, to the photo- and sono-fenton reactions enhanced MB degradation.
Observation of the domain wall propagation in CoFe and CoFeB nanowires driven by sub-nanosecond magnetic pulse using micromagnetic simulation
Authors: Hawibowo S , Kurniawan C , Djuhana D 
Published: April 2020

Abstract
In this study, we have observed the domain wall (DW) propagation in CoFe and CoFeB nanowires driven by sub-nanosecond magnetic pulse using micromagnetic simulation approach. The length of the nanowire is 2000 nm, the widths are varied of 50, 100, and 150 nm, and the thicknesses are 2.5 and 5.0 nm. The simulation was performed using a rectangular cell size of 5×5×t nm3 with t is the thickness of the nanowire and the damping factor is 0.05. The sub-nanosecond magnetic pulse length of 0.5 ns was used to move DW through the nanowire. We found that the DW velocity increased as the magnitude of magnetic pulse increased then abruptly decreased which known as the Walker Breakdown (H
WB). The transverse type DW structure is observed below the H
WB field while vortex/anti-vortex wall structure was formed above H
WB. We found that the H
WB value of CoFe and CoFeB decreased as the width and thickness of the nanowire increased. The increasing of nanowire thickness also caused the velocity reduction of DW. The energy competition between exchange and demagnetization energy contributed to the DW structure during propagation. The exchange energy is higher than the demagnetization energy as the formation of vortex/anti-vortex wall.
The photo-, sono-, and sonophoto-catalytic activity of an LaMnO3/TiO2/graphene composite for degrading methylene blue in wastewater
Authors: Susanti Y D , Triyono D , Saleh R 
Published: April 2020

Abstract
Here we describe the successful synthesis of an LaMnO3/TiO2/graphene composite using a co-precipitation method and three different weight percentages (wt%) of graphene. The structure of the sample was characterized using X-ray diffraction (XRD) and Fourier-transform infrared (FTIR) spectroscopy, and the thermal stability of the sample was characterized using thermogravimetric analysis (TGA) and differential thermal analysis. The XRD pattern of the sample confirmed the orthorhombic phase of the LaMnO3 nanoparticle and anatase phase of the TiO2 nanoparticle; however, the graphene peak unidentifiable by XRD was confirmed using TGA and FTIR spectroscopy. Moreover, we found that the photo-, sono-, and photosono-catalytic activities of LaMnO3/TiO2 were elevated by the presence of graphene material as an electron trapper, resulting in optimal rates of methylene blue degradation in the presence of 5 wt.% graphene.
Hysteresis observation of CoFe and CoFeB model disk using micromagnetic simulation
Authors: Mustaghfiroh Q , Djuhana D , Kurniawan C 
Published: April 2020

Abstract
In this work, hysteresis loop of CoFe and CoFeB disk ferromagnets are observed by using micromagnetic simulation OOMMF based on LLG equation. The diameter varied from 50–500 nm with the thickness 5 nm and 10 nm. For simulation process, the damping factor of 0.05 and the cell size 2.5 × 2.5 × 2.5 nm3 were fixed. We applied parallel and perpendicular external field to generate hysteresis loop of CoFe and CoFeB disk ferromagnets. Interestingly, we found two behaviours of coercivity, first less than diameter 100 nm and second, greater than 100 nm. For parallel-applied field of CoFe and CoFeB, the coercivity showed fluctuation around 20–160 mT. Greater than diameter 100 nm, the coercivity in a constant value around 40 mT for CoFe and around 20 mT for CoFeB. For perpendicular applied field of CoFe, we still observed the coercivity around 40 mT but greater than 100 nm, the coercivity dropped to zero. For CoFeB with perpendicular applied field, the coercivity decrease as the diameter increase until reach diameter 100 nm. Greater than the diameter 100 nm, the coercivity is constant at 20 mT. According to the results, we had observed the Perpendicular Magnetic Anisotropy (PMA) behaviour in both CoFe and CoFeB disk ferromagnets with certain value of the coercivity when the field applied in perpendicular direction.
Various Types of Perceived Job Discrimination and Sleep Health Among Working Women: Findings From the Sister Study
Authors: Lee Soomi , Chang Anne-Marie , Buxton Orfeu M , Jackson Chandra L 
Published: April 2020

Abstract
Job discrimination, a social stressor, may lead to sleep health disparities among workers; yet, limited research has examined this relationship and specific sources of job discrimination. We used a US sample of working women (n = 26,085), participants in the Sister Study (2008–2016), to examine the associations of perceived job discrimination due to sex, race, age, health conditions, and/or sexual orientation with sleep health. Cross-sectionally, linear or logistic regression models revealed that each source of job discrimination was independently associated with different sleep problems after controlling for other sources of job discrimination. Longitudinally, among participants without short sleep (&lt;7 hours/night) at time 1 (2012–2014), age-specific job discrimination was associated with 21% increased odds of new-onset short sleep (odds ratio = 1.21, 95% confidence interval: 1.03, 1.43) at time 2 (2014–2016). Among those without insomnia symptoms at time 1, race-specific job discrimination was associated with 37% increased odds of new-onset insomnia symptoms (odds ratio = 1.37, 95% confidence interval: 1.07, 1.75) at time 2. Sex- and health-specific job discrimination also predicted new-onset sleepiness. There were dose-response relationships such that a greater number of sources of job discrimination (≥3) was associated with greater odds of prevalent and incident sleep problems. Perceived job discrimination may contribute to working women’s poor sleep health over time, raising concerns about sleep health disparities emanating from the workplace.
The impact of compound library size on the performance of scoring functions for structure-based virtual screening
Authors: Fresnais Louison , Ballester Pedro J 
Published: April 2020

AbstractLarger training datasets have been shown to improve the accuracy of machine learning (ML)-based scoring functions (SFs) for structure-based virtual screening (SBVS). In addition, massive test sets for SBVS, known as ultra-large compound libraries, have been demonstrated to enable the fast discovery of selective drug leads with low-nanomolar potency. This proof-of-concept was carried out on two targets using a single docking tool along with its SF. It is thus unclear whether this high level of performance would generalise to other targets, docking tools and SFs. We found that screening a larger compound library results in more potent actives being identified in all six additional targets using a different docking tool along with its classical SF. Furthermore, we established that a way to improve the potency of the retrieved molecules further is to rank them with more accurate ML-based SFs (we found this to be true in four of the six targets; the difference was not significant in the remaining two targets). A 3-fold increase in average hit rate across targets was also achieved by the ML-based SFs. Lastly, we observed that classical and ML-based SFs often find different actives, which supports using both types of SFs on those targets.
Accurate calling of homeoallelic genotypes of iSelect markers using inbred structured populations
Authors: Shah Rohan , Keeble-Gagnère Gabriel , Whan Alex 
Published: April 2020

Abstract

Motivation
Genetic map construction is a foundational step in the analysis of structured experimental populations. For markers that hybridize to several genetically similar locations, or where several alleles are present (such as in multiparental populations), current methods often discard the marker or incorrectly call the genotypes. These errors result in information loss, or incorrect genotypes that can corrupt map construction.

Results
We present a new approach for simultaneously performing genetic map construction and marker calling. Our new approach allows the calling of a larger number of markers, a larger number of unique alleles per marker and the correct use of markers which hybridize to multiple genetically similar locations. We demonstrate our new approach using simulations, a biparental wheat population and an eight-parent population of spring bread wheat. Applying our method to the eight-parent population increased the number of mapped markers by 71%. We show that the new genetic map allows the investigation of synteny in ways that were not previously possible in that dataset.

Availability and implementation
The method described in this article has been incorporated into R package mpMap2. It is available from CRAN and also from https://github.com/rohan-shah/mpMap2.

Supplementary information
Supplementary data are available at Bioinformatics online.