bluuebunny/crossref_metadata_2025_split huggingface dataset:
Coherent control of complex conductivity in a conductive atomic medium
Authors: Ali Sajid , Ur Rahman Amin , Amin Bacha Bakht , Ullah Arif , Ul Haq Imran 
Published: May 2021

Abstract
The conductivity of a conductive atomic medium is controlled and modified by the strength and detuning of the control fields. At the probe resonance point the value of conductivity is measured to 500 S m−1 and at the control field resonance point the value of conductivity is measured to 600 S m−1. High value of conductivity is reported at the resonance points of the probe as well as the control field. At low decay and low intensity of the control field the value of conductivity is high, while contrast behaviors are also true. The significant modification in the value of complex conductivity may be useful for forward and backward emf-generation.
Linear optical circuits characterization by means of thermal field correlation measurement
Authors: Katamadze K G , Avosopiants G V , Romanova A V , Bogdanov Yu I , Kulik S P 
Published: May 2021

Abstract
We present a novel technique for linear optical circuits characterization, based on thermal field correlation measurements. Unlike the other known methods for multichannel interferometers measurements, proposed technique is robust to the input and output phase fluctuations and does not require any single-photon sources and detectors. This method has been tested in a numerical experiment and has proven to be effective even in the presence of noise.
Electronic and elastic properties of ternary fluoro-perovskite RbCaF3
Authors: Arora Gunjan , Ahuja Gagan , Ahuja Ushma 
Published: May 2021

AbstractWe present the electronic and elastic properties of cubic perovskite type RbCaF3computed using linear combination of atomic orbitals method within the framework of density functional theory (DFT). We have performedab-initiocalculations using the hybrid approach of Hartree-Fock and DFT namely, B3LYP (Becke’s 3 parameter functional combined with the nonlocal correlation functional of Lee-Yang-Parr) to determine the electronic response of Rb based cubic perovskite. In addition, we have computed elastic constants, bulk modulus, shear modulus, Young’s modulus and elastic anisotropes of RbCaF3. The results are found to be consistent with previously reported studies. The studied perovskite compound is mechanically stable, brittle in nature and show large elastic anisotropy. The band structure calculations reveal that RbCaF3 possesses indirect band gap with valence band maximum at R point and the conduction band minimum at theΓpoint of the irreducible Brillouin zone.
Isolation of Ureolytic Bacteria of Soft Coral and Their Potential in Microbially Induced Calcite Precipitation (MICP)
Authors: Susilowati P E , Ardianti D , Kartini S. , Sudiana I N , Zaeni A 
Published: May 2021

Abstract
Microbial-induced CaCO3 precipitation (MICP) via urea hydrolysis (ureolysis). Application of MICP is performed either by augmenting the site with ureolytic bacteria or by stimulating indigenous ureolytic bacteria. Alternative approaches to promote in situ MICP in soils biostimulation. Biostimulation encourages indigenous urea-hydrolysis bacteria by providing appropriate enrichment and precipitation media; it relies on the natural ubiquity of ureolytic soil bacteria. This study aims to obtain potential bacteria for calcium carbonate precipitation. The research methods used were (1) isolation of indigenous bacteria from soft corals and selection of potential bacteria for calcium carbonate precipitation; (2) morphological identification of selected isolates; (3) characterization of bacterial activity. This research has successfully grown 5 indigenous bacterial isolates from soft corals. One isolate, MICP-36, was able to grow on Marine Agar containing 25 g/L urea. The results MICP-36, was Gram positive and had a prosthetic cell shape. This isolate can induce calcium carbonate deposits of 0.083 g / mL. The test survival of bacteria in concrete showed that MICP-36 was able to live until the 28th day.
Antibacterial Activity of Ethanol Extract and Ethyl Acetate of Ginseng Bugis (Talinum Panicullatum Gaertn.) Leaves Against Staphylococcus Aureus and Escherichia coli Bacteria
Authors: Emelda A , Fitriana  , Adnan R S 
Published: May 2021

Abstract
Ginseng bugis leaf (Talinum paniculatum Gaertn.) contains flavonoids which are potential as antibacterial compounds. The aims of the research are to obtain the antibacterial activity of ethanol and ethyl acetate extracts from ginseng bugis leaves against Staphylococcus aureus and Escherichia coli. This study used ethanol and ethyl acetate extracts divided in 8 concentration series, namely 0.1%, 0.5%, 1%, 2%, 4%, 8%, 16%, and 32%. Testing antibacterial activity using the agar diffusion. The results of the screening test showed that ethanol extract and ethyl acetate of ginseng bugis leaf have inhibitory concentration at 0.5% against the test bacteria. The results of testing the antibacterial activity of ethanol extract and ethyl acetate have MIC value at a concentration of 2% and MBC value at a concentration of 8%.
Characterization of the gene encoding chitinase enzyme from bacillus isolates insulated from some locations in Southeast Sulawesi
Authors: Muzuni  , Yanti NA , Prasetya WM 
Published: May 2021

Abstract
This study aimed to determine the isolates of local Bacillus that have potential chitinolytic activity and to know the characteristic of the gene encoding chitinase enzyme from local Bacillus isolates from Southeast Sulawesi that were selected to have chitinolytic activity. Selection of chitinolytic bacteria based on bacterial ability to form clear zone on chitin agar medium which was grew by spread method and incubated for 4 days. From 5 test isolates used, one isolate which had chitinolytic activity was isolate Bacillus sp. Rh 3.8. The amplification of the gene encoding chitinase enzyme selected bacterial isolates was done by PCR (Polymerase Chain Reaction) technique using Chitbac F and Chitbac R primers. Sequence analysis was conducted by BLASTn, mapping of restriction enzyme using Bioedit software, analysis of amino acid using expasy software, analysis of hydrophobicity using Bioedit software, phylogenetic tree construction using MEGA software. The results showed that the characters of the gene encoding chitinase enzyme was a gene measuring 804 bp. Based on BLASTn analysis, the gene has 100% similarity with Bacillus thuringiensis SCG0402 (CP017577). The gene has 9 restriction enzyme cutting sites. Based on hydrophobicity analysis shows that the amino acid sequence of chitinase enzyme is dominant exist on hydrophilic region. The results of phylogenetic tree construction show isolates of the Bacillus sp. Rh 3.8 is a group with Bacillus thuringiensis so this strain is a species of Bacillus thuringiensis.
Phytotoxity Test of Probiotic Bacteria in Jack Bean Seed (Canavalia ensiformis L) Through Seed Viability Test
Authors: Sarijan  , Adrianus  , Ekowati Nurhening Y , Panga Nurhaya J 
Published: May 2021

Abstract
Phytotoxicity test of probiotic bacteria was carried out to determine its effect on the germination of jack bean seeds (Canavalia ensiformis L). The study was conducted in February to March 2017, at the Seed Health Laboratory and Seed Center of the Bogor Institute of Agriculture. The study was designed in a Randomized Block Design with seven treatments and three replications. The test results showed that three pairs of probiotics were toxic and three other pairs of probiotics that were not toxic to the growth of Canavalia ensiformis. The three pairs of probiotics that are not toxic are AcCKB20-P24 (D1), AcCKB4-B28 (D3), and AcCKW5-P24 (D4). The three pairs of probiotics that are not toxic are recommended for use in making bio-organic fertilizers for Canavalia ensiformis.
Distribution patterns and abundance of mullet fish populations (Mugil sp.) estuary areas
Authors: Sunarni  , Wairara Stenly M. B. S. , Sajriawati  , Elviana Sisca 
Published: May 2021

Abstract
Mullet fish (Mugil sp.) Is one type of fish found in the estuary area of the city of Merauke. In ecosystems, these fish play an important role in the food web, namely as a link between the lower trophic level to the higher one. The high utilization of mullet fish as both consumption and commercial fish is feared to have an impact on ecosystem imbalances. Information about the distribution patterns and abundance of mullets is not widely known. Therefore, the purpose of this study was to analyze the distribution patterns and abundance of mullets (Mugil sp.). This research was conducted in October to December 2016. The method used was Purposive Random Sampling which consisted of two sampling stations, namely Station 1 (Payumb Coastal Area) and Station 2 (Coastal Lamp One). Sampling is done at high tide and low tide conditions. To find out the distribution pattern of mullet fish, the Morisita Distribution Index formula is used while the abundance of mullet fish uses abundance index formula. The results showed that the distribution pattern of mullets at station 1 at high tide included the criteria for grouping / grouping (id> 1), while at low tide included the uniform criteria (id <1). At station 2 the distribution pattern of mullets both at high tide and low tide includes uniform criteria (id <1). The abundance of mullets both at station 1 or 2 at high tide and low tide is in the overflow category (id <1). Based on the results of the study it can be concluded that the distribution pattern of mullets at stations 1 and 2 includes criteria for grouping / clustering and uniform while abundance is not abundant.
Quality of organic fertilizer made from water hyacinth with the addition of corncobs waste and soybean dregs
Authors: Fitrihidajati H , Rachmadiarti F , Winarsih  , Purnomo T , Kuntjoro S 
Published: May 2021

Abstract
The purposed of this research was 1) described the nutrient quality of organic fertilizer made from water hyacinth with the addition of corncobs waste and soybean dregs, 2) described the difference in quality of the organic fertilizer made from water hyacinth with the addition of corncobs waste and soybean dregs, 3) described the best quality from organic fertilizer made from water hyacinth with the addition of corncobs waste and soybean dregs. The method of this research was experimental with completely randomized design. The experiment consisted of one treatment factor namely the type of raw material water hyacinth which included three types, namely P1: with the addition of corncobs waste; P2: with the addition of soybean dregs; P3: with the addition of corncobs waste and soybean dregs (50%:50% ratio). Each type of treatment was carried out three times so that the sample amounted 9. The measured parameters were nutrient content included C, N, C/N, P, K, and pH. The research was conducted at the Ecology Laboratory, FMIPA, Unesa. Data was analysed by descriptively quantitative and statistically used 1-way Anava. The results showed that 1) Based on the criteria of soil chemical properties, organic fertilizer content has the same quality in elements C, N, K, C/N (very high), pH neutral, and P was very low, 2) There was a difference in the effect of the type of material on the amount of nutrient content of organic fertilizer, 3) Water hyacinth that addition with corncobs waste had a higher amount nutrient in several elements namely C, N, K, C/N. Whereas organic fertilizer with addition soybean dregs had a higher amount of content in the element P.
The Diversity of Tolerant Fish in the Coastal Waters of Lusi Island Sidoarjo Regency
Authors: Fachrudiana A A , Rachmadiarti F 
Published: May 2021

Abstract
One of the government’s effort in overcoming the Lapindo mudflow is to drain mud through the Porong River to form sediments which over time form an artificial island called Lusi Island. As a result of the mud accumulation in the waters of the Lusi Island region can reduce the waters quality and existing organisms diversity. The purpose of this research was to descibed the diversity of fish that are tolerant in the Coastal Waters of Lusi Island Sidoarjo Regency, explained the relationship between the diversity index of fish and water quality in the Coastal Waters of Lusi Island Sidoarjo Regency, explained the relative abundance index of toleran fish in the Coastal Waters of Lusi Island Sidoarjo Regency, and know the water quality in the Coastal Waters of Lusi Island Sidoarjo Regency based on the diversity of fish. This research was did in November 2019 - February 2020. The type of research was observational reseach. Accumulation of sample fish and physical chemical quality of the waters were taken at five station. Identification fish of water based on morphological charateristics. The diversity index was analyzed according to the Shannon-Wiener index. The relative abundance index was analyzed index was analyzed based on the Odum Abundance. The result revealed that there were eleven species belonging to nine family. The relation between water quality and fish diversity index showed a positive relation which the bigger value of water quality was also followed by the bigger value of fish diversity index. The highest relative abundance index is in Mystus nigriceps fish species with 50% percentage and the lowest is Ethmalosa fimbriata with 3% percentage. The value of fish diversity in the Coastal Waters of Lusi Island Sidoarjo Regency is 2.31 which included in the uncontaminated category. So, it can be concluded the relation of fish diversity index with the physical and chemical quality of the water in the territorial waters of Lusi island Sidoarjo Regency is classified as not polluted, because the value of H > 2.0 which according to Lee, Wang & Kuo is included in the uncotaminated category.
Synthesis and charcterization of Cu-doped TiO2 (Cu/TiO2) nanoparticle as antifungal phytophthora palmivora
Authors: Natsir M , Maulidiyah M , Watoni A H , Arif J , Sari A , Salim L O A , Sarjuna S , Irwan I , Nurdin M 
Published: May 2021

Abstract
Preparation of Cu-doped TiO2 nanoparticles (Cu/TiO2) as antifungal Phytophthorapalmivorahas been carried out. In this study, we did a synthesis of Cu/TiO2

nanoparticles by the sol-gel method and determine the performance of the modification of Cu/TiO2 nanoparticles as antifungal agents P. palmivora. The stages of this research include synthesis of Cu/TiO2 nanoparticles using the sol-gel method, characterization of Cu/TiO2 nanoparticles using UV-Vis DRS and characterization of Cu/TiO2 nanoparticles using SEM-EDX, and P. palmivora antifungal activity test. TiO2 is known to be used as an antifungal agent and to increase photocatalyticactivity, TiO2 is doped with Cu metal ions to be active in visible light. The results showed that Cu/TiO2 has a band gap energy of 3.12 eV. Based on the results of SEM-EDX analysis of TiO2-Cu nanoparticles confirmed the presence of elements Cu (2.16%), Ti (28.74%) and O (69.10%) with morphological shapes such as irregular spheres. Cu/TiO2 nanoparticles have a strong ability at concentrations of 0.05% and 2.5% in inhibiting the growth of the fungus P. palmivora. Percent inhibition respectively 60.41% and 75% and at concentrations>3% have activities that can kill P. palmivora fungus.
Photocatalytic sensor for chemical oxygen demand flow system using N-TiO2/Ti electrode: determination of glucose and potassium hydrogen phthalate
Authors: Nurdin M , Ritonga H , Astria M , Salim L O A , Annisa D , Maulidiyah M 
Published: May 2021

Abstract
The design of the Chemical Oxygen Demand (COD) flow system using TiO2/Ti and N-TiO2 /Ti electrodes has been carried out. TiO2/Ti electrodes were synthesized from the anodizing process followed by the sol-gel method as nitrogen doping (N) to obtain N-TiO2/Ti electrodes. The test results obtained that TiO2/Ti electrodes are only active in UV light and N-TiO2/Ti electrodes can be active in visible light. Determination of the COD value of the flow system for glucose and potassium hydrogen phthalate at various concentrations respectively of 5, 10, 20, and 30 ppm was carried out using the Multi Pulse Amperommetry (MPA) technique. The results of the COD sensor measurement of the flow system on the potassium hydrogen phthalate and glucose obtained light currents increase in proportion to the increase in concentration, which is also significantly proportional to the increase in COD value. The highest COD values for glucose and potassium hydrogen phthalate were at concentrations of 30 ppm respectively of 29.73 and 31.34 mg/L O2 using TiO2/Ti electrodes and for N-TiO2/Ti electrodes respectively 30.91 and 29.20 mg / L O2.
Photoelectrocatalytic performance of ilmenite(FeTiO3) doped TiO2/Ti electrode for reactive green 19 degradation in the UV-visible region
Authors: Azis T , Nurdin M , Riadi L S , Arham Z , Irwan I , Salim L O A , Maulidiyah Maulidiyah 
Published: May 2021

Abstract
FeTiO3 doped TiO2/Ti eletrode synthesized through a sol-gel and dip-coating methods for Reactive Green 19 (RG-19) degradation under UV-Visible irradiation. The electrode was characterized by Scanning Electron Microscope (SEM), Linear Sweep Voltammetry (LSV), and Multi Pulse Amperometry (MPA). The electrodesurface show that a FeTiO3 layer is quite thin and evenly distributed on the surface of the TiO2/Ti electrode. The photocurrent responses of TiO2/Ti and FeTiO3 doped TiO2/Ti showed the TiO2/Ti electrode was active in UV light, while FeTiO3 doped TiO2/Ti was active in the visible light. The optimum condition show that the TiO2/Ti dopedFeTiO3provided RG-19 degradation activity of 95%.
High photoelectrocatalytic activity of selenium (Se) doped TiO2/Ti electrode for degradation of reactive orange 84
Authors: Muzakkar M Z , Maulidiyah M , Ningsi N , Salim L O A , Istiqamah R N , Musdalifah A , Nurdin M 
Published: May 2021

Abstract
Studies on the synthesis of TiO2/Ti doped Se electrode to degrade reactive orange 84 (RO 84) compounds under UV-Visible irradiation have been successfully carried out. The research objective is to obtain the Se-TiO2/Ti electrodes and test performance in degrading RO 84 under irradiation of UV-Visible light by photoelectrochatalytic. Se-TiO2/Ti electrode were prepared by anodizing and dip coating methods. XRD analysis of TiO2/Ti electrode showed the formation of anatase crystals. The surface morphology of the electrode showed the nanotube structure while the composition of the elements in the electrodes was determined by EDX and the presence of selenium was detected at 0.80%. The characteristics of using Linear Sweep Voltammetry (LSV) show that TiO2/Ti electrodes are active in UV light, while Se-TiO2/Ti electrodes are active in visible light. Electrode activity test in degrading RO 84 showed that the Se-TiO2/Ti photoelectrocatalis performance with variations in UV and irradiation of visible light was good in integrating RO 84 with a degradation rate of 98%.
Degradation test of organic congo red compounds using Mn-TiO2/Ti electrode by photocatalytic under the uv-visible iradiation
Authors: Nurdin M , Maulidiyah M , Syahputra R A , Salim L O A , Wati I , Irwan I , Mustapa F 
Published: May 2021

Abstract
Preparation of TiO2/Ti and Mn-TiO2/Ti electrodes was successfully carried out. The purpose of this study was to effect the addition of manganese (Mn) to TiO2 which will be used to degrade congo red organic compounds by photocatalysis. TiO2 is made through an anodic oxidation process. Mn coating is done by doping using the electrodeposition method. The results of the characterization using XRD showed that the TiO2/Ti electrodes were produced in the form of anatase crystals. SEM results show that nanotubes formed on the surface of the thin layer of TiO2/Ti. EDX results show the presence of manganese metal on the surface of TiO2/Ti of 6.58%. The characterization results using LSV showed that the TiO2/Ti electrode was active in UV light at a concentration of 1 ppm with 51.23% degradation and the Mn-TiO2/Ti electrode was active at Visible light at a concentration of 1 ppm with 75.48% degradation.
Bacterial from wawolesea hot springs: crack sealing application to concrete
Authors: Susilowati P.E. , Zaeni A. , Kartini S. , Rajiani N.A. , Hermawan H. , Sudiana I. N 
Published: May 2021

Abstract
Concrete is one of the most widely used construction materials for infrastructure, but concrete has the disadvantage of being easy to crack. One of the factors that influence concrete cracks is rain water, because water can enter and seep into the pores. Several studies have been carried out to overcome the cracking of concrete structures; one of them is the addition of bacteria that have calcium carbonate precipitating activity. Calcium carbonate from bacterial metabolism can closed on cracked concrete surfaces. This method is commonly called Microbial Induced Calcite Precipitation (MICP). The source of bacteria in this study is bacteria at Wawalosea hot springs from the limestone mountain. The research is healing of cracks in concrete compare by bacteria MICP and MICP immobilization using alginate-chitin. The results showed that the concrete made with the addition of MICP isolates as much as 1.6x108 cells / mL had a greater compressive strength than the concrete without the addition of isolates. The value of compressive strength and absorbency of concrete water with the addition of MICP isolates has a compressive strength of 25.78 Mpa and addition imobilization MICP has 18 Mpa. So when compared to concrete without the addition of isolates and concrete with the addition of MICP isolates, the value of concrete compressive strength occurred at 100%.
Identification of sea urchin gonads chemical compounds using thin-layer chromatography from Bokory island, Southeast Sulawesi
Authors: Karmilah  , Musdalipah  , Daud Nur Saadah , Reymon  , Fauziah Yulianti 
Published: May 2021

AbstractSoutheast Sulawesi is one area that has a diversity of potential marine biota as medicinal ingredients, including the sea urchin gonads. Empirically coastal communities have been hereditary, consuming sea urchin gonads as a source of high protein. Considering its potential as a raw material for medicines, it is necessary to conduct a series of tests to guarantee its safety and efficacy. This study aims to determine the chemical compounds of sea urchin gonad extract (Diadema setosumL) by Thin-Layer Chromatography (TLC). The research method uses a Pre-experimental design with a one-shot case study model. Identification of metabolites of sea urchin gonad extracts was carried out in two stages: phytochemical screening and identification by TLC method by UV-Vis. Samples were dried by the Freeze-drying method to get 335.11 g of dry samples and 58.06 g of extracts. The results of the test of the content of water-soluble and ethanol-soluble sea urchin extract were 5.73% and 3.72%. The results showed that in phytochemical screening, ethyl acetate extracts of the positive marine gonads contained alkaloids, saponins, and steroids. In addition, UV-vis 254 nm and 366 nm TLC methods showed alkaloids and saponins. The Rf values are 0.4 and 0.68, respectively.