bluuebunny/crossref_metadata_2025_split huggingface dataset:
Effects of alginic acid on radish growth and osmotic adjustment substance content under cadmium stress
Authors: Wang Huaifeng , Wang Li , Yong Mao , Wang Shibin , Cheng Fang , Li Qing , Hu Jinxin 
Published: April 2020

Abstract
To study the effects of alginic acid on the growth of vegetables, a pot experiment was conducted to study the effects of spraying alginic acid at different dilution folds on the growth and osmotic adjustment substance content of radish under cadmium stress condition. The results showed that the biomass, leaf length and leaf width of radish with 600, 900, 1200 and 1500 dilution folds alginic acid were higher than those of the control, while the soluble protein content, relative conductivity and malondialdehyde content of the radish were lower than those of the control. When the dilution factor of alginic acid is 600 dilution folds, the biomass, leaf length and leaf width of radish’s roots, root tubers, leaves and edible parts all reach the maximum. Increased by 19.39%, 35.27%, 19.74%, 29.44%, 22.11% and 14.01% compared with the control, respectively; the soluble protein content, relative conductivity and MDA content of radish reached the lowest, which were 38.76%, 29.86% and 35.61% lower than the control, respectively. Sprayed diluted alginic acid can promote the growth of radish, and the best dilution factor is 600 dilution folds.
Study on dynamic characteristics of Karst Spring in Jinan
Authors: Cao Qianqian , Xing Liting , Lan Xiaoxun , Zhang Xinhui , Dong Yanan 
Published: April 2020

AbstractIn order to ensure the efficient and reasonable utilization of groundwater and the sustainable development of groundwater systems in Jinan City, a hydrogeological survey was conducted in the study area of the spring area, collecting groundwater dynamic observation data over the years, and sampling and testing the water chemistry of the spring water. The characteristics of spring water flow and spring water chemical dynamics comprehensively summarize the spring water dynamics. Research shows that besides the influence of precipitation, the water level of Baotu Spring is also affected by the discharge of Wohushan Reservoir and various recharges, especially artificial supplementary measures have played a certain role in maintaining the water level attenuation of Baotu Spring during the dry season; The change law of spring water flow and groundwater level is the result of the combined effects of direct recharge of atmospheric precipitation, indirect recharge of river leakage, and groundwater excretion; due to the influence of human activities, the conventional ion composition of spring water has an upward trend. The research results provide technical basis for spring water protection.
The development of international conventions on nuclear damage compensation liability and where should China go?
Authors: Jiu LIU , Jialun LI , Zhang Xiaoyu 
Published: April 2020

Abstract
The research about establishing international nuclear damage liability legal regime never stops since the draft of the Paris Convention. The current international nuclear damage liability regime can be seen as two branches: the Paris Convention system and the Vienna Convention system. In spite of the similarity between the Paris and Vienna Conventions, their existences do not provide a uniform liability regime for all countries which are parties to either convention. Thus, there is a necessity to build a bridge between the two systems. Convention on Supplementary Compensation for Nuclear Damage establishes a worldwide liability regime attracting more countries. Compared with the previous two systems, Convention on Supplementary Compensation is more open and tolerant, supplement and enhance kinds of measures to increase the amount of compensation for nuclear damage, and is also the most frontier international convention of nuclear damage liability. Becoming a party of this Convention with the USA and Japan, China can not only enjoy the benefits from the Convention, but also be pushed to establish and perfect our own nuclear liability legal system and merges into international regime. In order to join this Convention, China must make full preparations, establish nuclear damage liability legislation, increase the compensation amount of the operators and the supplement compensation of government, and strengthen the ability of managing nuclear damage accidents of the operators and national government.
Automatic monitoring method for the rotation efficiency of the transmission of heavy duty vehicle
Authors: Fang Xiaofen 
Published: April 2020

Abstract
When the conventional logistics distribution demand forecasting method was used to forecast the multi-region logistics distribution demand, there was a lack of low analysis accuracy. Therefore, a multi-region logistics distribution demand forecasting method based on big data analysis was proposed. Big data technology was introduced to build a multi-region logistics distribution demand forecasting framework and to build a multi-region logistics distribution model. Based on the determination of different demands of logistics distribution among regions, the model of demand forecasting was embedded to realize the prediction and analysis of multi-region logistics distribution demand. The experimental data showed that the big data prediction method proposed was 57.23% higher in accuracy than the conventional method, which was suitable for the prediction of logistics distribution demand in different regions and multiple regions.
Strobilanthes crispus (B.) leaf extract-assisted green synthesis of ZnO-La2O3 composite and preliminary study of its photocatalytic activity
Authors: Ashna R I , Yulizar Y , Apriandanu D O B 
Published: April 2020

Abstract
In this study, ZnO-La2O3 composite as photocatalyst was synthesized via facile sol-gel route using biomaterial as a weak base source and a capping agent. ZnO-La2O3 composite was successfully formed through the reaction of Zn(NO3)2 (aq), La(NO3)3 (aq) and Strobilanthes crispus (B.) aqueous leaf extract. Zn-O and La-O vibration modes of ZnO-La2O3 composite was analysed by Fourier Transform Infra Red (FTIR) at 400 - 700 cm−1 wavenumber. Optical band gap of ZnO-La2O3 composite determined by using Tauc plot method was about 5.21 eV. X-Ray Diffraction (XRD) pattern of ZnO-La2O3 composite confirmed a combination of the diffraction patterns of ZnO particle and La2O3 particle. Photocatalytic activity of ZnO-La2O3 composite and ZnO particle were observed with methylene blue using UV light irradiation. The percentage of methylene blue degradation using ZnO-La2O3 composite and ZnO particle were 81.75 % and 74.87 %, respectively. This result shows that La2O3 was improving the activity and stability of the ZnO photocatalyst.
Synthesis and characterization of hydrogel NaCMC-g-poly(AA-co-AAm) modified by rice husk ash as macronutrient NPK slow-release fertilizer superabsorbent
Authors: Andani G , Helmiyati H 
Published: April 2020

Abstract
In this study, sodium carboxymethyl cellulose (NaCMC) based hydrogel grafted by poly (acrylate-acrylamide) by addition of rice husk ash (RHA) and NPK fertilizer to the superabsorbent with in-situ polymerization was successfully synthesized. In this work, the effect of NaCMC concentration and mass of RHA was done. The best water swelling capacity with 3 % NaCMC, 15 % RHA is 480 g/g with percentage of water release capacity is 38 %. Then, the effect of NPK fertilizer concentration on in-situ polymerization was carried out and the best swelling capacity with 5 % NPK mass is 650.10 g/g and percentage of release capacity obtained is 25.20 % for 6 days. The successful of the synthesis of hydrogels NaCMC-g-poly(AA-co-AAm) modified by rice husk ash as macronutrient NPK slow-release fertilizer superabsorbent supported by functional group was characterized by Fourier Transform Infrared (FTIR) and surface morphology by Scanning Electron Microscopy (SEM). The hydrogels based on NaCMC biopolymers and silica from rice husk ash as macronutrient NPK slow-release fertilizer superabsorbent produced slow release can be controlled and a promising material in the future and can be applied in agriculture field.
Polyclonal antibodies production from porcine gelatin and its preliminary study for immunosensor applications
Authors: Astuti A I , Soejoedono R D , Saepudin E , Assaat L D , Ivandini T A 
Published: April 2020

Abstract
Gelatin was extracted from porcine skin and used as an antigen to produce the polyclonal antibodies of porcine gelatin using New Zealand white rabbits for application in the development of an ELISA-based immunosensor for porcine gelatin recognition. The extraction of porcine gelatin from porcine skin was successfully performed with 20.52 % of yield. The characterization performed by using UV and IR spectroscopy indicated that the purified gelatin has a comparable quality against the commercial standard of porcine gelatin. Further analysis of the gelatin with SDS-PAGE method observed five separation lines with molecular weight bands of 57.06; 49.50; 42.94; 33.89; and 29.40 KDa, indicating that the gelatin can be used as an antigen to produce the polyclonal antibodies of porcine gelatin. After five injections of gelatin into the rabbit, ELISA characterization of the purified serum of the blood rabbit showed that the antibody with a concentration of 0.289 mg/mL could be produced.
Preliminary study on carboxylation reaction of phenylacetylene with CO2using nickel catalyst impregnated on mesoporous carbon
Authors: Hadi A , Abdullah I , Krisnandi Y K 
Published: April 2020

AbstractIn this research, carboxylation reaction of phenylacetylene with CO2has been studied using impregnated nickel on mesoporous carbon as catalyst. Mesoporous carbon was successfully synthesized using a soft template method with Pluronic F127 as pore template, and formaldehyde and phloroglucinol as the carbon source. This material was characterized with Fourier Transform Infrared (FTIR), X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), and Brunauer-Emmett-Teller (BET) analysis. Characterization with XRD shows the presence of two peaks at 24.26° and 42.76° which denotes the typical peak of graphite-like carbon. BET surface area analysis shows that the mesoporous carbon has a pore size distribution of 7.2 nm and surface area of 432.15 m2/g. Modification of mesoporous carbon was carried out by impregnation of Ni metal into mesoporous carbon (Ni@MC) through reduction of Ni(II) with ethylene glycol. The Ni@MC catalyst was used as a catalyst in the carboxylation reaction of phenylacetylene with CO2. The reactions were carried out in a batch reactor under various reaction conditions. High Performance Liquid Chromatography (HPLC) analysis of the product mixtures revealed that the highest yield of trans-cinnamic acid (2.83 %) was achieved at 85 °C for 12 h reaction time.
Effect of surfactants mixing of Tween 80 and Nonidet RK-18 in preparation of microspheres based on polyblend of poly(lactic acid) and polycaprolactone
Authors: Ferrariski A , Budianto E 
Published: April 2020

Abstract
In preparation of microspheres process with solvent evaporation method, microspheres are formed from the oil in water (O/W) emulsion droplets as a template in which the type and concentration of surfactant will affect the stability of the emulsion. This research aims to investigate the effect of composition and concentration of a mixture of Tween 80 and Nonidet RK-18 as a mixed emulsifier in the preparation of microspheres based on polyblend of PLA/PCL. The solvent evaporation method involves emulsification and dispersing the polyblend emulsion in water. The microspheres obtained were characterized using FTIR, stereomicroscopes, and PSA instrumentations. The result of this research shows that the mixed emulsifier produces smaller microspheres compared to the result of using Tween 80 or Nonidet RK-18 individually because of the presence of synergistic effect. When the surfactants mixture is used, the larger Tween 80 ratio in the mixture will increase the ratio of smaller microspheres obtained because of the high hydrophilicity of Tween 80 that can stabilize O/W emulsion. On the other hand, the addition of Nonidet RK-18 in an increasing manner of ratio or concentration may destabilize the emulsion droplets through Ostwald ripening that can occur because Nonidet RK-18 has a low cloud point (17 °C).
Influence of pyrolyzed temperature on the formation of silicon carbide fiber from polycarbosilane in electrospinning method
Authors: Masripah M , Zulys A , Setiawan J 
Published: April 2020

Abstract
The synthesis of silicon carbide (SiC) fibers by electrospinning method was done using polycarbosylane (PCS) as precursor and dimethylformamide (DMF)/toluene as solvent. Knowing the heat treatment of fibers consist of curing and pyrolisis, there were two steps in the major reaction. The curing process is by heating in air to make an oxidative cross-linking of the PCS. The pyrolysis process causes chemical decomposition from organic to inorganic compounds. These composition changes were described through Fourier Transform Infrared FTIR, Thermagravimetric analysis (TGA), X-Ray Diffraction (XRD) and Energy Dispersive X-Ray Spectroscopy (EDS) analysis. The products of electrospinning and curing were characterized by FTIR and TGA. The conversion to ceramic of PCS under various pyrolysis temperatures (1200, 1300, 1400, 1500) °C has been investigated and the products of this process were characterized by FTIR and XRD. Elemental analysis of the fiber as received and after cured showed that the ratio of H and C to Si decreased with holding time at the cure-temperature while the amount of oxygen increased. Meanwhile, the pyrolyzed generally produced silicon oxycarbide SiCxOy. Crystalline SiC β-SiC was found at temperature 1500 °C.
Synthesis and characterization of Au-TiO2 Janus nanostructures
Authors: Mulyantono M F , Gunlazuardi J , Khalil M 
Published: April 2020

Abstract
This work reports a comprehensive study on the synthesis and characterization of Au-TiO2 Janus nanostructures from pre-synthesized Au nanoparticles and anatase TiO2 nanoparticles. Here, well-distributed Au nanoparticles with mean particle diameter of ∼35 nm were successfully prepared using seed-mediated method, which exhibited a unique surface plasmon resonance (SPR) properties at 525.5 nm. Meanwhile, anatase TiO2 nanoparticles with perfectly spherical morphology were synthesized via sol-gel method, which could easily be integrated by the as-prepared Au nanoparticles. Based on the result, it is found that the resultant nanostructured exhibited a Janus heterostructure feature, where Au nanoparticles were efficiently found to be attached on the surface TiO2 nanoparticles. Furthermore, spectroscopic analyses also revealed that the integration of Au nanoparticles could widen the absorption spectrum of TiO2 to visible range due to the presence of SPR phenomenon.
The effect of sorbitan monooleate as surfactant in preparation of polyblend polylactic acid and polycaprolactone microspheres
Authors: Ryofi A N , Budianto E 
Published: April 2020

Abstract
Polyblend of polylactic acid (PLA) and polycaprolactone (PCL) microspheres with polymodal size distribution were synthesized through an emulsification-solvent evaporation method in water-in-oil (W/O) emulsions. Sorbitan monooleate was used as emulsion stabilizer and size controller in preparation of the microspheres. The effect of sorbitan monooleate addition in preparation on the size of the microspheres was studied by varying the volumes of sorbitan monooleate, the stirring speeds of emulsion formation, and dispersion times. The microspheres were characterized using Fourier Transform Infrared (FT-IR) and Particle Size Analyzer (PSA). The results show that there is no chemical interaction between PLA and PCL. This phenomenon can be seen from the FT-IR spectrum, which shows both PLA and PCL component. The particle size of microspheres decreased with the increasing volume of surfactant, emulsion stirring speed, and dispersion time. The size of microspheres obtained ranges from 0.4 μm to 10 µm. Physical forms of microspheres were observed using optical microscope. The result shows that some microspheres are spherical and others are in aggregates form.
Evaluation of dissolution of purified bromelain from pineapple core extract (Ananas comosus [L.] Merr) in the form of chitosan-coated microspheres
Authors: Zahrah T K , Setiasih S , Hudiyono S 
Published: April 2020

AbstractThe aim of this study is to coat the bromelain from pineapple’s core into chitosan microspheres crosslinked by glutaraldehyde to maintain its activity until it reaches the intestines. The crude enzyme was first purified by ammonium sulfate precipitation method, followed by the dialysis. The bromelain fraction of the dialysis has a specific activity of 294.44 U/mg with a purity level of 15.68 fold compared to the crude enzyme. Coating bromelain using glutaraldehyde crosslinked microsphere showed an efficiency of 87.14 %. The dissolution test results showed the release rate of bromelain in artificial gastric fluid is 9.35 % and in artificial intestinal environment is 79.92 %. The result of this study indicates that chitosan-coated microspheres are good enough as bromelain coatings for slow-release matrices.
Synthesis and characterization of Cu2+ imprinted polymer-tannin extract from mango leaf (Mangifera indica L.) for selective separation of Cu2+
Authors: Aribah F A , Nurani D A , Rahayu D U C , Krisnandi Y K 
Published: April 2020

Abstract
Tannins are secondary metabolites in Mango (Mangifera indica L.). This compound has a cluster of polyphenols as functional ligands for chelating Cu(II). Cu(II)-imprinted polymer-tannin (Cu-IP-tannin) was successfully synthesized by polymerization of phenol and formaldehyde with the complex of Cu(II)-tannins in acidic medium. Non-imprinted polymer (NIP) was similarly prepared without the presence of Cu(II) ions. The polymers were characterized by Scanning electron microscopy energy dispersive x-ray spectroscopy (SEM-EDS) and Fourier transform infra-red (FTIR). Cu(II) ions were completely removed by leaching the dried and powder of imprinted polymer with HNO3 0.5 M. The optimum pH of maximum adsorption of Cu(II)-IP-tannin was 7.0 for 120 minutes of contact time. The adsorption of Cu(II)-IP-tannin followed the Freundlich isotherm model with a maximum adsorption capacity of 99.08 mg/g. The relative values of the selectivity factor (αr) of Cu(II)/Ni(II), Cu(II)/Pb(II) and Cu(II)/Fe(II) on a single metal ion selectivity test were 23.89, 55.71 and 26.25, respectively.
Three-component reaction in 1,4-dihydropyridine synthesis catalyzed by Copper(I) Iodide nanoparticles
Authors: Cahyana A H , Ardiansah B , Aisyah N S 
Published: April 2020

AbstractWe have synthesized two 1,4-dihydropyridine derivatives via one-pot three-component reaction. The reactions were catalyzed by copper(I) iodide nanoparticles with crystallite size of 78.4 nm. Formations of cyclocondensation products were confirmed by Fourier Transform Infrared (FTIR), UV-Vis and Gas Chromatography-Mass Spectrometry (GC-MS) spectra.
Hydroprocessing of kemiri sunan oil (reutealis trisperma (blanco) airy shaw) over NiMoCe/γ-Al2O3 catalyst to produce green diesel
Authors: Yulia D , Zulys A 
Published: April 2020

Abstract
Kemiri Sunan is an alternative energy source that has a considerable amount of oil and does not compete for food source. Hydroprocessing of kemiri sunan oil has a big potential for renewable fuels. In this paper, NiMoCe/γ-AL2O3 catalyst is used for hydroprocessing of saturated kemiri sunan oil to produce renewable hydrocarbons. The catalyst was prepared by using wet impregnation method with variations of Ce 1%, 5% and 15%. The characterization of catalyst was used by means of Brunauer-Emmett-Teller (BET), Scanning Electron Microscopy (SEM), X-Ray Diffraction (XRD) and X-Ray Fluorescence (XRF). Hydroprocessing was performed using an autoclave batch reactor under operating conditions of 400° C and 35 bar pressure for 5 hours. GC characterization showed that the product of renewable hydrocarbons is dominated by the C15-C18, alkane chain.
Modification of glassy carbon electrode with NiO nanoparticles prepared using Ocimum sanctum leaf extract as urea sensor
Authors: Arief P R , Yulizar Y , Ivandini T A 
Published: April 2020

AbstractNiO nanoparticles (NiO NPs) have been prepared with green synthesis method usingOcimum sanctumleaf extract (OSLE), which contains secondary metabolite compounds of alkaloids as a weak base source and capping agent. Characterization using Particle Size Analyser (PSA) showed a particle size of NiO about 52.42 nm. NiO NPs was used as modified on glassy carbon (GC) electrode, and then characterized using cyclic voltammetry (CV) and Scanning Electron Microscopy-Energy Dispersive X-Ray (SEM-EDX). GC-NiO NPs was used for preliminary studies of urea sensor. The results showed that GC-NiO NPs can detect urea with limit of detection (LOD) values of 0.12 mM and linearity R2of 0.97. In addition, the repeatability of urea sensor studies with GC-NiO NPs electrode shows % RSD of 2.854, while its stability shows % RSD of 7.90 for 3 days.
Synthesis Pb(II)-ion imprinted polymer using tannins from mango leaves (Mangifera indica L.)
Authors: Sekarharum C , Rahayu D U C , Nurani D A 
Published: April 2020

Abstract
This work reports the synthesis of Pb(II)–Ion Imprinted Polymer (Pb-IIP) using tannin extract from Mango leaf (Mangifera Indica L.) as functional ligand (chelating agent and monomer). Pb2+ ion found to form a stable compound at 1:1 complex with tannin in aqueous solution. The resulting complex of Pb2+ and tannin extract was polymerized using phenol-formaldehyde as cross-linker in acidic medium. The structure and properties of Pb-IIP were compared to Pb-IIP gallic acid and Non Imprinted Polymer (NIP) that were synthesized with similar conditions. These polymers were charaterized by Fourier Transform Infrared (FTIR) and Scanning Electron Microscopy-Energy Dispersive X-Ray (SEM-EDX). The template of Pb(II) ion was completely removed from the polymeric matrix using 1 mol/L HNO3. The optimum pH of maximum sorption was 5 on IIP-tannin and IIP-gallic acid at 120 mins contact time. Maximum capacity of tannin Pb-IIP, gallic acid Pb-IIP, and NIP were 153.159 mg/g, 147.959 mg/g, and 138.218 mg/g, respectively. It was found that the tannin Pb-IIP sorbent is more selective than gallic acid Pb-IIP and NIP.
In vitro study of DNA-adduct formation (8-OHdG) due to exposure of benzo[a]pyrene and Co(II) through fenton-like reaction
Authors: Wijanarko S A , Budiawan B , Dani I C , Handayani S 
Published: April 2020

Abstract
Severely increasing environmental pollution with an unhealthy pattern of life in the community can increase the source of exposure of carcinogenic substances that can cause cancer. Benzo[a]pyrene and Cobalt (II) are some examples of carcinogenic substances commonly found in the environment. Both materials can simultaneously enter the body through food or polluted air and damage the DNA. In this study, we studied the effect of B[a]P and Co(II) exposure in-vitro on 2’-deoxyguanosine. An increase in the amount of the 8-hydroxy-2’-deoxyguanosin compound is used as an indicator of the occurrence of DNA damage and a cancer risk biomarker. It was found that the synergistic effect on the combination of B[a]P and Co (II) through Fenton-like reaction is influenced by the concentration of H2O2. The amount of 8-OHdG that formed with the combination of B[a]P and Co (II) is 126.23 ppb. It does not vary much with the amount that resulted from B[a]P exposure alone at 136.53 ppb. Exposure of Co(II) through Fenton-like reaction alone gives the highest yield of 8-OHdG formation at 282.67 ppb. Followed by B[a]P and Co(II) at 258.98 ppb, B[a]P and H2O2 at 153.16 ppb.