bluuebunny/crossref_metadata_2025_split huggingface dataset:
Effects on Structural, Functional groups and Photo Luminance Properties of Copper Doped Zinc Oxide Nanoparticles
Authors: Sable Pradip B. , Thabet Nabeel , Yaseen Jameel , Botewad Sunil N. , Gaikwad D.K. , Joshi A. A. , Dharne G. M. 
Published: October 2020

Abstract
Abstract Present study we reported the structural, optical and functional group study of copper-doped zinc oxide nanoparticles (NPs) synthesized by chemical co-precipitation method. In this study doping concentration of copper (0.2, 0.4, 0.6) was incorporated in zinc oxide. All the synthesized samples were characterized by X-ray diffraction (XRD) as well as Fourier transform infrared (FTIR) and studied the photo luminance (PL) property. XRD study confirms the structural and purity of ZnO and Cu doped ZnO nanoparticles. The average grain size of pure ZnO was calculated by Scherrer formula and it varied according to doping concentration from 25.10 to 20.26 nm. The average grain size of pure ZnO was decreased for Cu-doped samples. The presence of functional groups and chemical bonding were confirmed by FTIR. Due to the doping concentration of copper the structural, functional group and photo luminance properties of ZnO was changed drastically.
Synthesis of Vanadium Ferrite Nanoparticles By Microwave Assisted Technique
Authors: Vilvanathaprabu A , Ravikumar Balaji , Perumal Seenuvasakumaran 
Published: October 2020

Abstract
Among the magnetic materials ferrites are of great interest due to its distinctive properties. Ferrites exhibit a spontaneous magnetic moment below a Curie temperature and act as insulators at low temperature. Sincethey have been used in number of technological applications like microwave devices, magnetic and magneto optic recording, data storage etc. The incredible magnetic, electric and dielectric properties of ferrites make them more attractive and applicable in the current field of science and technology. In the present study vanadium ferrite nanoparticles were synthesized by microwave assisted method. The structural properties of synthesized nanoparticles are carried out from X-ray diffraction technique. The presence of peaks confirms the crystalline nature of the vanadium ferrite nanoparticles. The crystal structure, crystalline size (D), Dislocation density (8) is determined from XRD data. Also using Williamson-Hall plot micro strain value is calculated.The different molecular vibrations are confirmed through Fourier Transformed Infrared Spectroscopy (FTIR) vibration spectra. From the Ultra Violet Spectroscopicdata using the Tauc relation, the energy gap (Eg) at the edge of absorbance band is calculated as 4.28eV for direct and 4.84 eV for indirect transition. The morphological studies are done through Scanning Electron Microscope (SEM). From the SEM micrographs we confirm the presence of spherical nanoparticles and they are arranged uniformly. From VSM analysis, we calculated the saturation magnetization as 20.00 emu, coercivity as 125.96 g, and retentivity is 130.45 emu.
AC conductivity in SeTeAg/PMMA composites solid electrolyte
Authors: Gupta Anubha , Malik K. , Kumar R. 
Published: October 2020

Abstract
SeTeAg glasses are prepared by melt quenching technique. The (Se80Te20)100-xAg*/PMMA (where x =2, 4, 6, 8 and 10) composites are prepared by solution casting method. The bulk samples are characterized by XRD, DSC and SEM. DSC scan reveals that the prepared samples are composites because both phases show their separated glass transition temperature Tg and melting temperature Tm. Complex impedance spectroscopy is used to carry out the electrical measurements in the frequency range 10 Hz to 100 KHz. Frequency dependent of the real and imaginary parts of the impedance plotted in the complex plane, were used to calculate the conductivity of different compositions of (Se80Te20)100-xAg/PMMA composites. It has been observed that the room temperature conductivity of the composite increases with increase in Ag content form 1.31×10-5 to 1.15×10-4
(Q. cm)1, while their corresponding activation energies are decreasing. It has also been concluded that conduction is thermally activated with single activation energy.
Mono and hybrid nanofluid based heat sink technologies - A review
Authors: Chandravadhana A , NandaKumar V , Venkatramanan K 
Published: October 2020

Abstract
This paper presents a review of mono and hybrid nanofluid using heat sink technologies, which is the foremost task of new generation technology in cooling electronic devices. Heat generation in a tiny electronic device is the main factor to be prevented to enhance the heat transfer. One prominent remedy for this problem is to adopt mono and hybrid nanofluid based microchannel heat sinks are considered to be the recent trends.In this article, a state-of-the-art review of heat sinks, nanofluids preparation and characterization techniques have been carried out. The study begins with an overview of the heat sink, designing parameters, research work carried out in the last decade using mono nanofluids and hybrid nanofluids followed by the analysis of the research work carried out in the last decade in terms of different geometries of MCHS to examine the diverse factors like pressure drop, heat transfer coefficient, and critical heat flux. Current challenges and opportunities for future research are presented as well.
Rare Earth Ion (La3+) Doped BaTiO3 Perovskite Nanoceramics for Spintronic Applications
Authors: Devmunde B. H. , Somwanshi Saurabh B. , Kharat Prashant B. , Solunke Madhukar B. 
Published: October 2020

Abstract
The present study reports the structural and morphological investigation of La3+ doped BaTiO3 nanoceramics prepared by combustion synthesis. The effect of La3+ doping on the structural and morphological properties was examined by the X-Ray diffraction (XRD), transmission electron microscopy (TEM) and selected area electron diffraction (SAED) technique. Room temperature XRD analysis shows that prepared samples are in a single phase with the tetragonal structure. Structural parameters like average crystallite size (D) and lattice constant (a and c) were calculated from the XRD data. The surface morphology of the samples was studied by transmission electron microscopy (TEM) technique. It was found that the nanoparticles are in tetragonal shape with agglomeration to the some extent. All the outcomes show that La doped BaTiO3 nanoceramics are promising candidates for spintronic applications.
Multiferroic Fe3+ ion doped BaTiO3 Perovskite Nanoceramics: Structural, Optical, Electrical and Dielectric Investigations
Authors: Bhoyar Dhananjay N. , Somvanshi Sandeep B. , Nalle P. B. , Mande V. K. , Pandit A.A. , Jadhav K. M. 
Published: October 2020

Abstract
In the present investigation, nano crystalline Sr0.5Ba0.5Ti1-xFexO3 (x = 0.00, 0.15, 0.20) nanoparticles (BST) were synthesized by sol-gel auto combustion method. The effect of iron (Fe) doping on the structural, electric and dielectric and optical properties examined by the X-Ray diffraction (XRD), two probe and UV-vis techniques. XRD analysis shows that prepared samples are in a single phase with the tetragonal structure at room temperature. Structural parameters like average crystallite size (D) and lattice constant (a and c) were calculated from the XRD data. The surface morphology of the samples was studied by field emission scanning electron microscopy (FE-SEM) technique. It was found that the nanoparticles are cubic in shape for parent BST nanoparticle whereas Fe doped shows tetragonal shape. Energy dispersive spectrum (EDS) reveals that compositional elements are in stoichiometry proportion. The DC electrical resistivity measurements of the prepared samples were carried out in the temperature range of 300-850 K using a standard two-probe method. The electrical resistivity (ρ) decreases with temperature and Fe concentration. The frequency dependence of dielectric parameters such as dielectric constant (□) and loss tangent (tan □) was measured at room temperature in the frequency range of 30Hz to 1MHz. The dielectric parameters show strong compositional as well as frequency dependence. The higher values of dielectric parameters were found at lower frequencies. UV-visible absorption spectra showed that absorption edge shifted to higher wavelength with increasing Fe concentration while corresponding energy band gap of the prepared nanoceramics decreases with increasing Fe concentration.
Low-cost Fabrication of Cu doped ZnO (Zn0.95Cu0.05O) Film for Enhanced Gas Sensing Applications
Authors: Wadatkar A. S. , Kharat Prashant B. , Ambhore Ajay V. , Onkar S. G. 
Published: October 2020

Abstract
Cu doped ZnO film (Zn0.95Cu0.05O) was fabricated by simple and cost-effective screen printing method. The structural and optical properties of prepared film was studied through X-ray diffraction (XRD) and UV-Vis spectroscopy techniques respectively. XRD analysis revealed the polycrystalline nature of prepared film with hexagonal structure. The optical band gap determined from UV-Vis analysis was found to be 3.40 eV. The gas sensing performance of prepared film was studied at room temperature toward different concentrations of NO2 ranging in between 1ppm – 5ppm. The response and recovery time was noted as 13s and 92s respectively. All these outcomes shows that the Cu doped ZnO film shows enhanced gas sensing performance and can be utilized for industrial scale production of gas sensors.
Gamma Ray Attenuation Properties Biomedical Important Organic Compounds
Authors: Huse S.D. , Obaid S. S. , Joshi A. A. , Gaikwad D. K. , Pawar P.P. , Shitre A.R. 
Published: October 2020

Abstract
Gamma ray attenuation parameters such as mass attenuation coefficient (µm),total atomic cross section (6t), electronic cross section (6e), effective atomic number (Zeff),Effective electron density(Neff), for Acetylsalicylic acid ( C9H8O4 ), Acetic acid (C2H4O2), Acetergamine (C4H7N5 ), Usnic Acid (C18H16O7), Erucic Acid (C22H42O2), Formic Acid (CH2O2)in the diagnostic energy range (0.122-1.330 MeV) were determined experimentally theoretically. Theoretical values were obtained from XCOMcode. In experiment, NaI(Tl) scintillation detector housed in a narrow beam geometry set up was utilized the measured attenuation of gamma rays. All samples were irradiated to gamma rays using point radioactive sources 57CO,133Ba,22Na,137Cs, 54Mn, and 60Co. From the obtained results of um6t,6e, Zeff and Neff, it is found that these gamma ray attenuation parameters of selected samples are affected by change in the energy of incoming photons. A fairly good agreement was observed between measured and XCOM data. The attenuation parameters were decreased with increase in energy of photons owing to the dominant photon interaction in the energy range 0.122 to 1.33 MeV except Zeff and Neff. The Zeff values of the organic compounds were observed between ∼3 to ∼4, agreed well with average atomic number.
Mapping of Parkia speciosa (petai) land suitability distribution as one of multipurpose tree species (MPTS) at community agroforestry land
Authors: Rahmawaty  , Batubara R , Marpaung RME , Rauf A 
Published: October 2020

Abstract
In Indonesia, Parkia speciosa (petai) is one of multy purpose tree species (MPTS). It belongs to the Fabaceae family and commonly found in agroforestry land in North Sumatera. This study aimed to map the distribution of land suitability for P. speciosa in Peria-ria Village and Sari Laba Jahe Village, Biru-biru Sub-district, Deli Serdang District, North Sumtera Province, Indonesia. This research was conducted by a survey method to collect soil samples based on the land unit yhat was obtained from overlay soil map, land use map, and slope map. Land suitability was evaluated based on the matching method. The Geographic Information System (GIS) was used to map the distribution of land suitability class. The results showed that the actual land suitability class for P. speciosa were moderately suitable (S2) (8.25%), marginally suitable (S3) (14.26%) and not suitable (N) (77.5%) in this area. Erosion hazard (eh), root zone medium (rc), availability of water (wa), and nutrient retention (nr) were the dominant of limiting factor in this area. The most difficult constrain to counter were root zone medium and water availability.
The correlation between Ampel bamboo (Bambusa vulgaris) dimension and geometry with its modulus of elasticity
Authors: Kartini  , Nugroho N , Bahtiar E T 
Published: October 2020

Abstract
Traditionally, Indonesian people are used to using bamboo as construction material. Whole bamboo stems (bamboo culm) which is round and hollow, has several segments and tapered. Regarding the development of bamboo utilization for construction material, testing standards and code of practices are needed to ensure the users safety. The quality of bamboo construction can be improved by using a stress grading system. Therefore, this research is needed to obtain the grading variable that influences the modulus of elasticity of Ampel bamboo (Bambusa vulgaris). Based on analysis of their variable, bamboo’s dimension and geometry are not affecting modulus elasticity value. This result shows that the further research for grading system is required to obtain identify characteristics parameter of Bambusa vulgaris that correlate with the modulus of elasticity.
Diversity of vegetation in three cover types of forest at Mappi District, Papua
Authors: Alhamd Laode 
Published: October 2020

Abstract
Diversity of vegetation in three cover types of forest, Mappi, Papua. Mappi District, located in southern part of Papua, is one area that has a unique forest area especially in biodiversity species of flora. The aim of this study is to know tha types of vegetation and their potential. Observations were made using 9 plots, 20 × 20 m2 in size of each plot; as tree (DBH [Diameter at Breast Height] > 20 cm), 10 x 10 m2 in size; as pole (10 < DBH <20 cm), 5 × 5 m2; as sapling (DBH <10 cm) and 2 × 2 m2; as seedling. All vegetation in the plot are inventoried according to their growth rate. The location of the observation is based on land covers, namely swamp, secondary dryland and primary dryland forests. The results showed that the ecosystem in the swamp forest is located on the banks of the river with vegetation cover varying up to the mainland, such as Pandanus tectorius, Stenoclaena palustris, Cerbera manghas, where the species S. palustris is the species that mostly covers the forest floor. In the secondary forest, the vegetation types were consisted of Tristaniopsis ferruginea, Canarium denticulatum, Rhodamnia cinerea, Aporosa sp. and Palaquium sp. While in the primary dryland forests had stands of several species with high canopy and the forest floor covered by thin litter as lowland forest ecosystems, such as Santiria apiculata, S. laevigata, Cryptocarya crassinervia, Fagraea racemosa, Gonystylus macrophyllus, Vatica rassak and Prunus arborea.
Stability analysis of a Pichia pastoris recombinant clone expressing human insulin precursor
Authors: Nurdiani D , Hariyatun  , Utami N , Putro E W , Kusharyoto W 
Published: October 2020

AbstractCurrent recombinant human insulin production utilizes two major expression systems,Escherichia coliandSaccharomyces cerevisiae-based expression systems. Methylotropic yeast,Pichia pastoris, has appeared as a promising alternate yeast recombinant host for insulin precursor (IP) expression due to its ability to produce high titers, efficient secretion, and growth to very high cell densities. Similar to theS. cerevisiaesystem,P. pastorissecreted soluble IP into the culture supernatant. In the previous study, we have establishedP. pastorisrecombinant clones harboring synthetic insulin precursor (IP) expression cassette integrated into their genomes through homologous recombination. It is essential to verify that the expression cassettes of the IP encoding gene remain stably integrated with the genome during such prolonged methanol induction. Therefore, we aimed to analyze the stability of one recombinant clone (CL-4) expressing the human insulin precursor by verifying the stable integration of the IP expression cassette into the genome by PCR, and the IP protein expression after prolonged methanol induction over 70 generations. We found that the expression cassette was stably integrated into the genome of the CL-4 recombinant clone and the IP expression was sustained after 72 generations of cultivations in the culture and induction media without antibiotic selection.
Phenotypic and molecular changes in cassava (Manihot esculenta Crantz.) genotypes as a response to water-deficit stress
Authors: Wahyuni Y , Supatmi  , Sri Hartati N , Sudarmonowati E 
Published: October 2020

Abstract
Three local Indonesian cassava (Manihot esculenta Crantz) genotypes, Adira 4, Roti, and Ubi Kuning retained their growth under a water deficit environment. To understand the physiological and molecular responses of cassava plants under such stress, we observed leaf stomata characteristics, i.e. stomata dimension (width and length) and density, and molecular expression of aquaporin (AQP) gene, respectively. The observation was performed on all genotypes on day 26 and 45 after water-deficit treatment. Quantification of gene expression was performed by comparing the threshold cycle (Ct) values of AQP with Ct values β-tubulin for each genotype. Results showed that water deficit treatment significantly affected both stomata density, length and width in all genotypes. On day 26 after treatment, the density of stomata in Roti and Ubi Kuning increased two times higher than the stomata density in plants under well-watered supply. Stomata length of Roti and Adira 4 under water stress was 0.4 times shorter than those under normal water supply. Relative expression of AQP, encoding AQP PIP2 proteins, in the Roti genotype showed that the gene transcripts have no significant elevation after experiencing water stress. In Adira 4, the expressions of AQP increased two-times at day 26 under water-deficit treatment compared with AQP expressions in well-watered treatment and continued to elevate up to three times higher at day 45 than those of expressed in Adira 4 plants under well-water treatment. In addition to stomata phenotypic changes, Ubi Kuning may regulate its water channel proteins AQP PIP2 to control turgor pressure in the beginning phase of water stress conditions. These results showed that three cassava genotypes responded differently under water deficit stress and these may serve as basic knowledge for further analysis.
Effect of glucose, sucrose, and lactose solution on the stability of betacyanin pigment from red dragon fruit (Hylocereus polyrhizus) peels
Authors: Pamungkas M S , Rahayuningsih E , Kusumastuti Y 
Published: October 2020

Abstract
People use peels, stems, leaves, and fruits of plants as a natural colorant. One part of fruit peel that has potentially used as a food colorant is red dragon fruit peels. The pigments found are betacyanin, but betacyanin compounds are easily degraded by heat, pH, and light. Degradation of betacyanin forms betalamic acid compounds (yellow) and cyclo-DOPA acids (cloroless). In this work, an attempt was made to increase the stability of betacyanin pigment against temperature by adding stabilizer such as glucose, sucrose, and lactose. Betacyanin extract was obtained from extraction using water solvent at pH 6 with a ratio of 1:4 (w/v). Extract was diluted and added stabilizer at concentration 0 ppm, 100 ppm, and 150 ppm. The solution was heated in a water bath at temperature of 60 °C for 1 hour. The content of betacyanin was examined by a UV-VIS spectrophotometer at a wavelength of 534.8 nm every 15 minutes. The retention value for 150 ppm of lactose was the greatest of all the stabilizer with the value of 61.95%. Pigment betacyanin was degraded more slowly in a lactose solution. The highest half-life time increased by 24.24% for dissolution in 150 ppm lactose. Thus, lactose has the potential to increase the stability of betacyanin.
Preparation of Carbon Monolith Derived from Resorcinol-Formaldehyde Resin and Its Application for Antibiotic Adsorption
Authors: Fajrin FA , Prasetyo I , Ariyanto T 
Published: October 2020

Abstract
The presence of antibiotics in wastewater discharged to the waterbody has negative effects. The antibiotics can induce bacteria to be persistent. Hence, efforts to limit the concentration of antibiotics in wastewater are required. In this work, the removal of antibiotics was performed by adsorption using nanoporous carbon in the form of a monolith. The carbon monolith was prepared by pyrolysis of templated resorcinol formaldehyde polymer at 600°C and 800°C. The material was characterized systematically by scanning electron microscopy and an N2-sorption analyzer. As a comparison, commercial carbon of coconut shell-derived was also employed in the study. The characterization showed that porous carbon monolith has a high specific surface area up to 594 m2/g. In the adsorption test, the results indicated that carbon monolith was better at adsorbing antibiotics compared to the commercial one.
Expression Analyses of Methylase Genes of Ppamc125 In Methylating Pbbre194 Prot-CM1 Plasmid In Escherichia Coli DH5a and TOP10
Authors: Priyanka VA , Helianti I , Ulfah M , Mulyawati L , Abinawanto  
Published: October 2020

Abstract
In molecular biological techniques, bacterial transformation is an essential process to strain improvement. However, transformation rate into wild type bacteria is commonly low because of the cell defense mechanism of the bacteria. Restriction modification (RM) in bacteria cells can prevent the introduction of recombinant plasmids into target bacteria. Previously, the transformation of recombinant shuttle vector pBBRE194 containing protease gene into wild type Bacillus halodurans CM1 (pBBRE194 prot-CM1) has been conducted. However, the transformation rate seemed low, and the stable recombinant clones could not be obtained. Therefore, in vivo methylation of this plasmid in E. coli has to be done before genetic transformation into the wild type bacterium, to obtain stable recombinant CM1 clones. In this study, a plasmid with artificial modification (pPAMC125) harboring genes encoding for the modification enzymes (methylases) from another strain, B. halodurans C-125, and a shuttle E.coli-Bacillus vector pBBRE194 prot-CM1 plasmid were transformed simultaneously into E. coli DH5a and TOP10, respectively. The expression of methylation enzymes genes carried by pPAMC125 in the presence of different L-arabinose concentration was observed via SDS-PAGE analyses. The analysis of the effect of these genes expression towards plasmid pBBRE194 prot-CM1 was performed by digesting the plasmid with the extracted cell of B. halodurans CM1. The digestion pattern was analyzed via DNA electrophoresis. As a result, compared to E. coli DH5a, E. coli TOP10 exhibited better condition for methylase genes expression with the result that pBBRE194 prot-CM1 plasmid was not be completely degraded by B. halodurans CM1 restriction endonuclease.