bluuebunny/crossref_metadata_2025 huggingface dataset:
SOLUTION OF THE PROBLEM OF STABILITY OF 40X STEEL SHELL
Authors: Cheremnykh S , Kuzhin M
Published: January 2020

Discusses the solution of the problem of a circular elastic-plastic bifurcation of thin-walled cylindrical shell under the proportional subcritical processes loading shell axial compressive force and torque in deviatoric space of deformations of A. A. Ilyushin. The solution is based on the theory of stability of inelastic systems under complex loading V. G. Zubchaninov. The incompressibility condition of the material and the homogeneity condition of the stress state in the shell up to the moment of loss of stability are used. The problem is solved in a geometrically linear formulation [1-7].
Formation of the spatial structure of a condensed system of calcium sulphate dihydrate
Authors: Buryanov A F , Petropavlovskaya V B , Novichenkova T B , Petropavlovskii K S
Published: January 2020

At present, universal models of the structure of crystalline bodies are well known. Such models should describe the structure of solids at the micro level. They are presented in the form of geometric topological models. Spatial models are also used to describe the structures of mineral disperse systems that arise during their crystallization. The arrangement of system elements represented as non-deformable rigid spheres can be interpreted based on topology. Simulation in the study of condensed systems makes it possible to quickly process and analyze significant data arrays in the directional synthesis of complex dispersed systems.
Saint-Venant principle for kinematic boundary conditions
Authors: Saiyan Sergey , Paushkin Alexander
Published: January 2020

A variant of the extended formulation of the Saint-Venant principle is formulated, including its generalization to kinematic parameters. Using the LIRA CAD software package, a numerical experiment is carried out, during which the zones of tangential stress disturbances in the support zone of a rigidly clamped I-beam under various kinematic boundary conditions are determined.
Impact of loading rate increase on stress-related properties of concrete
Authors: Tsvetkov K
Published: January 2020

Concrete and reinforced concrete structures of buildings and facilities can be exposed to dynamic loading in which case various kinds of stressed states may occur. To make up the design models of these structures, it is necessary to know the characteristic features of changes in the stress-related properties of concrete, taking account of the joint impact of stressed states and increased loading rates. Several researchers have obtained the data about the impact of the loading rate on the stress-related properties of concrete, mainly for uniaxial compression and under bending [1]-[10], whereas the goal set in this paper is to analyze the loading rate under biaxial compression in which one of the main stresses is generated by static loading and the other by dynamic loading. The study was carried out by experimental research methods. The test results are presented as load-strain charts, plots of changes in strain modules and transverse and dilatational strains. According to the investigation results, the kind of charts is heavily influenced by the kind of stressed state and the loading rate. The analysis of the test data allows making suppositions about the physics of the impact of the loading rate on the peculiar features of concrete strain.
The loss of durability in reinforced concrete structures
Authors: Maj Marek , Grzymski Filip , Ubysz Andrzej
Published: January 2020

Durability becomes a very important factor in design. Concrete, and in particular reinforced concrete constructions, are sensitive to environmental impacts (actions on construction) and also have a strong environmental impact (e.g. pollution, noise, dynamic interactions etc.). The feature of concrete, which is durability, has an impact on the reliability of the structure. The time during which the structure has a fixed durability should be one of the parameters in the design of the structure. Durability despite the passage of time of use can be restored.
Urinary Stones Clustering on each layer based on Hounsfield Units Values from Micro CT-SkyScan Images
Authors: Warty Y , Haryanto F , Fitri L A , Maulana R , Herman
Published: January 2020

The appropriate treatment method for the patient with urinary stones can be determined from the information of the mineral composition of urinary stones. The prediction of the stone type could improve the selection of the interventional modalities. The study aimed to determine the type of the urinary stone for each layer based on the value of Housefield Units (HU) from micro CT-SkyScan images. Five samples were cleaned with 75% alcohol and distilled water. Micro skyScan 1173 was used to scan urinary stones with applied current and voltage of 66 mA and 120 kV respectively. NRecon software was used to reconstruct the projected image. Region of Interest (ROI) was set at each layer and analyzed both qualitatively and quantitatively. The determination of chemical constituents of stones/fragments was performed using Energy Dispersive X-Ray Spectroscopy. The chemical compositions of calcium oxalate monohydrate, struvite, a mix of calcium oxalate and calcium phosphate, a mix of calcium oxalate and struvite and calcium phosphate, uric acid were accurately identified based on the micro SkyScan images with the mean HU. Micro SkyScan images could predict the chemical composition for each layer of urinary stones. However, more samples are needed for clustering various types of urinary stones based on HU value.
Influence of Impulse-Electric Field on Dielectric Properties of Nerve Membranes
Authors: Tarigan Kerista , Sembiring Timbangen , Wirjosento Basuki , Sinambela Marzuki
Published: January 2020

An investigational study of the impulse-electric field on an increase in the potential of nerve membranes, increased ion absorption of Na, K, Cl, has been conducted. The aim of this study is not only to observe the performance of the electric field as a source of energy but also to look the effective, efficient and non-thermally disabling, disinfecting the microorganisms. Based on the result of research, qualitatively with object of parasitic nematode, there is tenfold increase possibly in critical nervous membrane from normal potential, in intensity of electrical field of 13.33 – 18.66 kV/cm in angle, θ is 44.41˚, and comparative membrane dielectric decreased to 0.2, it led to dielectric rupture, non-active effects, and needs an energy only 0.64 mJ for twenty triggers, with condition of electrode potential of 6.3 kV.
A proton-neutron QRPA Calculation of the β- Decay of Nd152 using the Fayans Energy Density Functional
Authors: Oktova Raden
Published: January 2020

This paper presents a calculation of the β– decay of the neutron-rich nucleus Nd152 using the proton-neutron Quasi-particle Random Phase Approximation (pnQRPA) model. The single-particle ground states are calculated self-consistently using the Fayans energy density functional in a Hartree-Fock-Bogoliubov (HFB) scheme for deformed nuclei. The quasi-particle states which are needed for the pnQRPA calculation are calculated from the HFB single-particle ground states using the Bardeen-Cooper-Schriefer (BCS) approximation. Only Gamow-Teller β– excitations are considered, and two kinds of excitation force are used to excite the daughter nucleus to produce the β– decay: (a) a pure Migdal force, and (b) a Migdal force plus a correction term obtained self-consistently from the BCS quasi-particle basis. The calculations with the pure Migdal force and the corrected Migdal force give half-lives of 5.92 min and 6.91 min, respectively, which are about one half of the experimental value of 11.6(7) min, and decay energies of 1.38 MeV and 1.33 MeV, respectively, both close to the experimental decay energy of 1.12 MeV. The correction to the Migdal excitation force turns out to improve the accuracy of the calculations.
Structural and Radiation Shielding Properties of Dy3+ doped Phosphate Glasses
Authors: Kothan S. , Kaewkhao J. , Kim H.J. , Muangmala W. , Kiatwattanacharoen S. , Jumpee C. , Kaewjaeng S.
Published: January 2020

X - Rays has become integral and indispensable part of health care diagnosis and intervention. Which involve the risks of occupational overexposure of radiation to the patients and health care personnel. The Radiation exposure depends on “Time-Distance-Shielding”. Reduction of the exposure time, increasing the distance from source proper shielding are important for protection. We need a high quality or suitable shielding material for reduction of unnecessary radiation. Although the material commonly used for radiation shielding is lead, but the environmental toxicity of lead (Pb) is a global threat that has led to the need to develop lead-free (Pb-free) and non-toxic radiation shielding glasses. In this study, the effect of Dy2O3 on physical and radiation shielding properties of 59P2O5: 10Al2O3: 20 Na2O: 10 Gd2O3: 1Dy2O3 glasses have been investigated were fabricated by melt-quenching technique. The X-rays shielding properties such as the mass attenuation coefficients (μ
m
) and half value laver (HVL) of glass sample. It may also be mentioned that glass has the double function of being a radiation shielding material because of the properties of glass being transparent to visible light, absorption X-rays. Thus, the developed glasses shielding had good shielding properties, and highly practical potentials in the environmental friendly radiation shielding materials without an additional of lead.
Mechanical properties of brake pad composite made from candlenut shell and coconut shell
Authors: Juan Randy Simamora , Kurniawan C. , Marbun J. , Simamora P.
Published: January 2020

Development of technology, driving a lot of demand for materials that are cheaper, durable, and environmentally friendly for various purposes, especially in the automotive field. The most important safety feature of any vehicle is its braking system. The ability of brakes is to provide safe and repeatable stopping, which is related to safety of automobiles and human. In this study, candlenut shells (CdNS) and coconut shells (CNS) are used as composite materials in the manufacture of brake linings. The presented research work investigates / explore the mechanical properties and physical of brake pad composites formed candlenuts shell (CdNS) and coconut shell (CNS) composite and wear performance of friction materials. The specific wear rate generally increases with the increase in applied load and sliding speed for all compositions.
Hydrothermally Synthesis of Al2O3 Nanoparticles for Nanofluids with Enhanced Critical Heat Flux
Authors: Dani Gustaman Syarif , Djoko Hadi Prajitno , Jupiter Sitorus Pane
Published: January 2020

Water is widely used as a heat carrier in various devices such as automotive and nuclear reactors. Because of its better thermal characteristics, currently nanofluid is a candidate for replacing water and other conventional cooling fluids such as ethylene glycol and oil as a heat carrier. In this study, Al2O3 nanoparticles have been synthesized by the hydrothermal method for heat transfer nanofluid as an alternative to the new cooling fluid. Nanoparticles were synthesized using AlCl3 as a precursor, and urea was used as a capping agent. The hydrothermal process was carried out at 175°C for 17 hours. The hydrothermal product was dried and then calcined at 500°C for 1 hour. The resulting Al2O3 nanoparticles were analyzed using XRD, FTIR, and TEM. Nanofluids were prepared from these nanoparticles by dispersing them into the water as a base fluid. Nanofluid characterization was carried out through Critical Heat Flux (CHF) measurements. According to the XRD data, the Al2O3 nanoparticles produced were gamma-alumina with a crystallite size of 4 nm. The BET specific surface area was 302 m2/g. From the TEM image, it was known that the nanoparticles formed a cluster of rod-shaped particles. FTIR data shows the presence of OH groups on the surface of the nanoparticles. The Al2O3 nanofluids made were known to be stable with an average zeta potential of 54 mV. Compared to water, the CHF enhancement of this nanofluid increased by 111%. The nanofluid has the potential to be used as a cooling fluid for ECCS, RVCS, refrigeration, and metal machining process.
The effect magnesium (Mg) on structural and optical properties of ZnO:Mg thin film by sol-gel spin coating method
Authors: Siregar Nurdin , Motlan  , Panggabean Johnny
Published: January 2020

ZnO:Mg thin film had been synthesized by sol-gel spin coating method. The materials used were zinc acetate dehydrate, magnesium, isoprol as a solution and diethanolamine as stabilizer. Concentration variation between Mg doped ZnO were 0.5; 1.0; 1.5; 2.0 and 2.5%. The XRD results showed that all samples were wurtize hexagonal with the smallest size of 24 nm for Mg doped of 0.5% and the biggest size of 28 nm for Mg doped of 2.5%. The SEM results showed that the ZnO:Mg thin film morphology was uniform round granules. The UV-Vis results showed the biggest transmission and absorbance values were in the range of 310 - 420 nm, and band gap of 3.155 - 3.217 eV.
Nd3+ Doped In Zinc Barium Tellurite Oxyfluoride Glasses For Laser Application
Authors: Yamsuk Y. , Yasaka P. , Keawkhao J. , Sangwaranatee N.
Published: January 2020

The tellurite glasses doped with Nd3+ ion were prepared with the compositions (55-x)TeO2-10ZnF2-35BaO-xNd2O3 (where x = 0.00, 0.05, 0.10, 0.50 1.00 and 1.50 mol%) by the normal melt quenching technique and characterized the spectroscopic properties. The spectroscopic properties of tellurite glasses measured from the absorption and emission measurements with Judd-Ofelt analysis. The X-ray diffraction (XRD) pattern confirms the amorphous nature. UV-Vis-NIR absorption spectra of tellurite glasses divulged nine significant peaks. The absorption peaks slightly increase with increasing of Nd3+ concentration. The NIR emission spectra at 913, 1,069 and 1,341 nm have been registered for Nd3+ in tellurite glasses, which corresponds to the transitions originating from 4F3/2 level to the 4I9/2, 4I11/2 and 4I13/2 levels of Nd3+ ion, respectively, under the excitation of 523 nm. The results indicate that the prepared glass system could be a suitable candidate for using it as laser gain media around 1,069 nm.
Effect of Sodium Oxide and Sodium Fluoride in Gadolinium Phosphate Glasses Doped with Eu2O3 Content
Authors: Ravangvong S. , Rajaramakrishna R. , Chanthima N. , Sangwaranatee N. , Kaewkhao J.
Published: January 2020

Sodium gadolinium phosphate oxide and sodium gadolinium oxyfluoride glasses doped with europium oxide were prepared by melt-quenching technique. The physical, optical properties of the glass samples were studied. The density, molar volume and refractive index of the glass samples were carried out. Density and molar volume of oxide glass is more than oxyfluoride glass. The average phosphate to phosphate distance for oxide glass seems to be more than oxyfluoride glass. Polaron radius, inter-ionic radius shows 1.181 nm, 2.88 nm and 1.174 nm, 2.86 nm for oxide glass and oxyfluoride glasses respectively. Oxide electronic Polarizability and optical basicity of the oxide glass are lower than oxy-fluoride glass. Theoretical optical basicity shows higher for oxide glass than oxyfluoride suggesting increase in covalency of the cation to oxygen bonds in oxide glass. Optical band gap were estimated and found to be 3.061eV and 3.204 eV for oxide and oxyfluoride glass. Theoretical two photon absorption coefficient β were evaluated and found to be 11.96 and 10.80 for oxide and oxyfluoride glasses respectively. Furthermore, the glasses were subjected to study for their luminescence properties of the oxide and oxyfluoride glass samples.
The effect of Al Element on Electrochemical Impedance of ZnO Thin Films
Authors: Sugihartono Iwan , Budi Setia , Fahdiran Riser , Handoko Erfan
Published: January 2020

We have grown no-doped and Al-doped ZnO thin films with different Al element composition by ultrasonic spray pyrolysis (USP). The deposition by USP was performed with the temperature of 450 °C, ultrasonic frequency of 1.7 MHz, and under atmosphere ambient for 15 minutes on top of Si substrate. Structurally, X-ray diffraction (XRD) pattern of non-doping and Al-doped ZnO (AZO) thin film have polycrystalline hexagonal wurtzite and amorphous. Optical absorbance confirmed that AZO thin films with polycrystalline phase have higher absorbance than amorphous. According to the frequency-dependent Nyquist plot of non-doping and AZO thin films at room temperature, we believed the proper concentration of Al in ZnO thin films can be used to improve electron transfer ability.
The study on Er3+ doped lithium bismuth aluminium borate glass for infrared medium applications
Authors: Kaewnuam E , Wantana N , Kaewkhao J
Published: January 2020

In this work, lithium bismuth aluminium borate glasses doped with different concentration of Er2O3 were prepared to investigate the physical, chemical group, optical and luminescence properties. All glasses were prepared by melt-quenching method. Glass density is in a range of 3.20 – 3.27 g/cm3 with no obvious relation to Er2O3 concentration. The FTIR spectra confirm the trigonal BO3 and tetrahedra BO4 borate unit appearing in glass network. This BO4 unit and non-bridging oxygen tend to increase with increment of Er2O3 content. Er3+ in glass absorb photon in visible light and near-infrared region, confirmed by the absorption spectra. The emission and excitation spectra perform the infrared emission of Er3+ under 523 and 977 nm excitation. The strongest emission with 1536 nm belongs to 1.00 mol% Er2O3 doped glass that was excited by photon with 523 nm. This developed glass possesses the good potential for using as the source and medium material for infrared emitting and communication device.
Investigation the Effect of Soft X-ray Flash Exposure on PN Diode
Authors: Chaiyasoonthorn S , Srithanachai I , Niemcharoen S , Sangwaranatee N
Published: January 2020

In this paper will present the properties of PN diode before and after expose by radiation. Although, radiation help to improve the performance of semiconductor device but still has some damage in device structure. In previous article I have showed performance improve after expose by soft radiation. The device is exposed by low frequency X-ray radiation (soft radiation flash exposure: SRFE) technique with few second for several times. In principle of PN diode after fabrication will has defects from process such as ion implantation, doped and silicon wafer process. The results show temperature while SRFE expose on device that generate high temperature on surface and silicon boundary that may the optimize energy and expose time for treatment damage of PN diode.
Model of Physics Landslide for Disaster Mitigation in Sitinjau Laut Area Padang City Sumatera Barat
Authors: Putra D J
Published: January 2020

Sitinjau Laut area of Padang city is very prone to landslides because it has a very steep terrain (70º to 85º), improper land use and high rainfall. In the context of investigating potential landslides in this region, landslide potential analysis was carried out in five locations with a rating method for seven variables; slope, soil and rock structure, effective soil depth, rock weathering level, land use, vegetation density and rainfall. The total value of each location is, the first location has a total value of 26 with a category of severe landslide potential, the second location has a total value of 26 with a category of severe landslide potential, the third location has a total value of 24 with a category of severe landslide potential, the fourth location has a total value 21 with a moderate landslide potential category and the fifth location has a total value of 22 with a moderate landslide potential category. It is hoped that this research can provide input to the Regional Government in the context of landslide mitigation in the region. So that the risks posed by landslides can be minimized for the future.
Deformation Mapping of the 2018 Sulawesi Earthquake by Satellite Radar and Optical Remote Sensing
Authors: Tampubolon Togi , Juliani Rita , Hutahean Juniar , Yanti Jeddah
Published: January 2020

The 7.5-magnitude earthquake was intensified epicentre located in the Mountains Donggala Regency, Central Sulawesi. Devastating earthquake and tsunami on September 2018, that struck and erased urbans and suburbs in stricken city in Central Sulawesi and surrounded. The main priorities of the risk disaster management in post-event are fast and safe detection of geohazards to help search and rescue team do mitigation. Satellite radar and optical remote sensing represent the aim of this research to answer this task with Interferometric Synthetic Aperture Radar (InSAR) by Sentinel-1 Interferometric Wide (IW) Level-1 Single Look Complex (SLC) images and optical satellite data by Sentinel-2 Level-1C product. We collected both of satellite images covering the time interval October 2018 – July 2019. We improved the proposed approach, named as Goldstein interferogram filter and the landslide mapping in Central Sulawesi. The methodology, which is intended as an effective process to suppress phase noise to improve the accuracy assessment and represent the experimental information from a full stack of InSAR data and optical data, is ideally acceptable for geohazard mitigation strategies. This potential method refers to great performance for detecting more than 100 areas affected by active deformation that are most dangerous for one or more risky elements in several parts of three cities.
Integrated Science Learning Development of Model Inquiry Training Based on Comics
Authors: Fitriani  , Harahap M.B , Bukit N.
Published: January 2020

This research aims to get the product of the learning device of science. The research method is research and development (R & D) research with the model of Gall, and Borg. This study finds an integrated Science learning model of comic-based student books. This product has been validated by a team of experts stating that the ingredients have been performed by appropriate methods and procedures for needs analysis, planning, evaluation and stages for using the materials for the study. The results of trials on the use of product results that have a real impact on student learning outcomes. The implications of the findings of this study provide inspiration and role models for other teachers in designing their learning materials.
Temperature Analysis Of Tinggi Raja Geothermal Reservoir, Simalungun District
Authors: Domini Lestari Sinaga , Tampubolon Togi
Published: January 2020

Reservoir temperature measurements have been carried out using the empirical geotermometer method at the High Raja Geothermal Simalungun district in order to determine the value of the High Raja geothermal reservoir temperature. The study was conducted using the Na-K geotermometer method, the Na-K-Ca-Mg geotermometer, a Na-K-Ca-Mg geotermometer to obtain the temperature value of the geothermal reservoir. The results of the study Based on the empirical Geotermometer equation show the surface temperature of hot water at three points showed that at the point I obtained hot water surface temperature of (65.0 ± 0.5°C) with a surface pH of 5.2 hot water, point II the hot water surface temperature of (65.0 ± 0.5°C) with a large surface pH of hot water 5.8, and point III the surface temperature of hot water is (63.0 ± 0.5°C) with a large pH surface of hot water 5.8. The average concentration of chemical elements contained in hot water samples include Ca for (255.33 mg / L), K for (150 mg / L), Mg for (43.63 mg / L), Na for (34, 13 mg / L) and the average temperature of the reservoir that can be received using the Na-K-Ca Geotermometer is a temperature of 182.89921°C
Design of IoT-based Radiation Monitor Area for Nuclear and Radiological Emergency Preparedness System in Yogyakarta Nuclear Area
Authors: Muhtadan  , Abimanyu Adi , Akmalia Rizqi , Salam Mahrus
Published: January 2020

Yogyakarta Nuclear Area (YNA) is one of BATAN’s nuclear facility that has many nuclear facilities such as nuclear reactor, accelerator, irradiator, and waste management system. Due to nuclear accident is potentially occur, YNA has nuclear emergency response program and there is a preparedness system to support this program. Radiation monitoring system is one of utilization to acquire and record nuclear radiation exposure in the facility and its environment. An Internet of Thing based radiation area monitor was developed to improve the system not only to acquire the radiation exposure, but also to distribute the acquired data to the cloud server through the internet network. The distributed radiation data can be utilized to analyze nuclear emergence potential in the nuclear emergency response and preparedness system. The area monitor system was designed as sensor network that consists of Geiger Muller detector and high voltage power supply, signal conditioning system, and Arduino as counter and data processor. Data is acquired by a detector and it is transmitted to the server through wireless network using the node MCU communication module. The receiver station system was developed to acquire data from database server to display the radiation exposure in the environment and to identify radiological emergency status. Based on the chi square test stability method, the developed device has good stability which the probability of x
2 was obtained 0.75. The validation testing also was done using Sr-90 and x-ray spectrometer as radiation source, and the developed device has been compared using a standard survey-meter. The mean square error of this validation testing was 0.37 and 0.24 respectively for Sr-90 at two difference source distance, while for x-ray spectrometer source the mean square error value was 2.48. For further development, the system will be combined with a smart meteorological system to build the integrated data acquisition system for Nuclear and Radiological Emergency Preparedness System in Yogyakarta Nuclear Area.
Optimization of PM2.5 Measurement System Using NOVA SDS011 Sensor
Authors: Wardoyo A Y P , Dharmawan H A , Nurhuda M , Adi E T P
Published: January 2020

Particulate matters with the diameter less than 2.5 µm or PM2.5, have been known to the health adverse. The developing of a measurement system of PM2.5 with a high precision has become a challenge in the last decade. We design the system using a NOVA SDS011 sensor to measure PM2.5 concentration. The problem is that the sensor has a capacity to measure particulate matter in the range of 0.3 to 10 µm, meanwhile we would like to design the measurement system of PM2.5 with the high precision. Another this that we address is how to optimize the sensor. A factor influenced the sensor optimization is a sample compartment. In this paper, we present the PM2.5 measurement system with the different compartments. The PM2.5 measurement system was calibrated using the 3443 Kanomax dust monitor. The result shows that the system works well with the compartment is important factor to increase the precision.
An Automatic and Realtime Control of Ammonia Concentration in Catfish Pond Water Based on MQ137 Sensor
Authors: Pulungan I H , Nasution T I , Ningsih H W , Tarigan K , Fathurrahman
Published: January 2020

MQ137 sensor has been successfully used to control ammonia concentration automatically and in realtime in a catfish pond water. The ammonia testing was carried out by bubbling pond water to vaporize ammonia gas to sense by the sensor. The result showed that the could detect the ammonia concentration below 1 ppm and it instructed the water pump to flow the water through a water filter to reduce the ammonia concentration. The application of pond water quality control has resulted in a reduction in the number of catfish deaths due to poisoning.
Molecular Docking Studies of Potential Quercetin 3,4’-dimethyl ether 7-alpha-LArabinofuranosyl-(1-6)-glucoside as Inhibitor antimalaria
Authors: Malau N D , Azzahra S F
Published: January 2020

The purpose of this research is to analysis the potential Quercetin 3,4’-dimethyl ether 7-alpha-LArabinofuranosyl-(1-6)-glucoside as an inhibitor Plasmodium falciparum Enoyl Acyl Carrier Protein Reductase (PfENR) compound for antimalaria. The method used to analysis the potential Quercetin 3,4’-dimethyl ether 7-alpha-LArabinofuranosyl-(1-6)-glucoside as an antimalaria was insilico approach by molecular docking using Autodock Vina. Based on the free energy parameter analized ΔG, the value of free energy ΔG is -11.6 kcal / mol with 5 repetisions. The free energy ΔG value from the analysis results was relatively low, this means that Quercetin 3,4’-dimethyl ether 7-alpha-LArabinofuranosyl-(1-6)-glucoside is stable to be used as an inhibitor of Plasmodium falciparum Enoyl Acyl Carrier Protein Reductase (PfENR). Because the lower the free energy of a molecule the more stable the molecule. Based on hydrogen bond parameters, there were hydrogen bonds in Quercetin 3,4’-dimethyl ether 7-alpha-LArabinofuranosyl-(1-6)-glucoside and PfENR receptors. This shows that Quercetin 3,4’-dimethyl ether 7-alpha-LArabinofuranosyl-(1-6)-glucoside binding PfENR receptors to strong and stable. Based on the parameters of the analysis of Ligand and Receptor Interactions also showed that Quercetin 3,4’-dimethyl ether 7-alpha-LArabinofuranosyl-(1-6)-glucoside compounds were stable used as Plasmodium falciparum Enoyl Acyl Carrier Protein Reductase (PfENR) inhibitors for antimalaria.
Motor vehicle exhaust carbon monoxide and hydrocarbon emission content reduction by banana peel activated carbon
Authors: Yuliusman  , Sinto J , Nugroho Y W , Naf’an H I , Nafisah A R , Sipangkar S P
Published: January 2020

Air pollution caused by motor vehicle exhaust emissions produced gases such as carbon monoxide (CO) and hydrocarbon (HC) that are dangerous for health of living things. Those gases can be adsorbed with activated carbon made from agricultural waste such as banana peel because it has quite high lignocellulose content and available in large amount in Indonesia. Activated carbon from banana peel in this research was used the AC made in previous studies which has 617 mg/g and 614 mg/g surface area for chemically activated AC and chemical and physical activation combined respectively. The characterization of activated carbon was done by Scanning Electron Microscopy (SEM) and Energy Dispersive X-ray Spectroscopy (EDX) tests which resulted that the pore on AC surface was visually clear and the AC contained up to 88% of carbon, respectively. Chemical-activated carbon with H2SO4 6 N was capable of adsorbing 40.46% CO and 31.51% HC respectively. While physical-chemical activated carbon with H2SO4 6 N was capable of adsorbing 56.27% CO and 42.63% HC. The banana peel waste was proven to be a promising adsorbent raw material to reduce pollutant contents in environment.
The Oxidant Effect of Bisphenol A (BPA) Can be Decoupled from its Endocrine Disruptor Property
Authors: Wisesa I B G R , Sukoco H , Siswanto F M
Published: January 2020

Bisphenol A (BPA) is an environmental defilement released mainly from polycarbonate plastic and epoxy resins. The main toxicological impact of BPA is its endocrine disruptor activities. Its structural features confer the ability to bind to both estrogen receptor (ER) subtypes. Furthermore, we recently reported that BPA aggravates male reproductive hormones. In addition to its endocrine disruptor properties, we have also reported that BPA possesses oxidant activity which is able to trigger oxidative stress. Several types of research previously reported that oxidative stress may cause hormonal imbalance and vice versa. However, the relation of both the toxicological properties of BPA is poorly understood. In this study, we found that oral testosterone undecanoate treatment in BPA-induced rats does not prevent decreasing serum superoxide dismutase, glutathione peroxidase, and catalase, and increasing serum malondialdehyde. Oral N-acetyl cysteine (NAC) in BPA-induced rats also does not attenuate decreasing total testosterone levels. These results suggest that the oxidant effect and endocrine disruptor property of BPA can be separated and might not interfere with one another. Therefore, future treatment in any pathological condition resulting from BPA exposure has to be carried out with more comprehensive approaches rather than focusing on its endocrine disruptor activity.
Case Study of Canine Monocytic Ehrlichiosis (CME) in Pomeranian Dog at PDHB drh. Cucu K. Sajuthi
Authors: Syaputra J G E , Sajuthi C K , Sajuthi T P , Herlina  , Permata F S , Purwatiningsih W
Published: January 2020

Canine monocytic ehrlichiosis (CME) is tick-borne disease of worldwide distribution. The major causative agent is Ehrlichia canis, a gram negative, obligate intracelullar, pleomorphic bacterium of the genus Ehrlichia, which infects monocytes, macrophages and lymphocytes. This study aims to understand the diagnostic approach and therapeutic of CME in Pomeranian dog. The examination methods used were physical examination, complete blood count and blood chemistry, urynalisis, X-ray, and E. canis/anaplasma ab test kit. The result of physical examination found dehydration (CRT>2), bruises in the neck area, bleeding in the gums, dyspnoea, and thicks infestation. CBC, blood chemistry, and urynalisis test result showed anemia, severe thrombocytopenia, hypoproteinemia with hypoalbuminemia, and renal azotemia. The result of x-ray examination show the fluid aqumulation in thorax cavity. The result of E.canis/anaplasma ab test kit revealed positive result of E.canis. The dog was diagnosed with canine monocytic ehrlichisosis (CME). The dog was treated by antibiotic, hemostatic, and antiemetic.
Organoleptic properties evaluation of purple Hibiscus sabdariffa L (Roselle) calyx extract-fortified yogurt
Authors: Noviatri A , Setianingrum A , Haskito A E P
Published: January 2020

Yogurt is a bacteria fermented milk product, containing bioactive peptide components, which potential as antioxidant, reducing damage of cells caused by free radicals. Purple Hibiscus sabdariffa L (roselle) calyx has anthocyanin and phenolic compound which has capacity as antioxidant. The addition of purple rosella calyx extract to yogurt increases the antioxidant potential, as well as in organoleptic value. The aim of this study was to determine which the best concentration of purple Hibiscus sabdariffa L (roselle) calyx extract-fortified yogurt, based on organoleptic evaluation. This study used organoleptic evaluation was involving 30 panellists, consist of the hedonic test comprised color, taste, aroma, texture and the overall value, and the hedonic quality test comprised color, sour taste, roselle taste, sweet taste, dairy aroma, and texture. Factor of treatment was the concentration of purple roselle calyx extract-fortified in pasteurized cow’s milk fermented by lactic acid bacteria, Lactobacillus bulgaricus, Streptococcus thermophiles, and Lactobacillus acidophilus, consisted of 3 levels, i.e. 0.5; 1; 1.5% (v/v). Data was analysed using Kruskal-Wallis nonparametric test, if the result was significantly different (p<0.05) then it processed using Mann-Whitney test (α=5%). The result of this study showed that 1.5% was the most preferable concentration of fortification by panellist based on its color. The average panellist also stated that the 1.5% was has darker color (less red) compared to 0.5 and 1%. The color of 1.5% concentration is most preferable (highest average value, 3.83) because on its darker color than the others.
Identification of gram-negative bacteria of Bali cattle with repeat breeding cases on East Lombok, West Nusa Tenggara Province
Authors: Aminuddi S P , Alpian S B , Dita P , Kholik
Published: January 2020

The target of self-sufficiency in 2017 has been launched by President of Republic Indonesian. The province of West Nusa Tenggara (NTB) with “Bumi Sejuta Sapi (BSS) and UPSUS SIWAB Program has been recognized as the key site for production and supply of meat and cattle for all of part of Indonesia. One of the classic problems that led to the lack of that program is the repeat breeder in cattle that associated with the presence of Gram-negative bacteria in the reproductive tract. The purpose of this study was to identify bacteria in the reproductive tract of Bali cattle that used for UPSUS SIWAB Program in East Lombok. This research was conducted in January 2019 at Kopang Village, East Lombok district. Four Bali cattle with repeat breeders case in east Lombok were used in this research. Uterine fluid as samples were collected with a sterilized plastic sheet of artificial gun. The sterilized plastic sheet of artificial gun was inserted into the vagina and then passed through the cervix up to the body/horn of the uterus. The end of the plastic sheet was cut and placed into BHI (Brain Heart Infusion) and they were incubated over the night. After 24 hours the samples were inoculated in MacConkey agar under aerobic conditions at Laboratory of Public Health and calibration, Province of West Nusa Tenggara Barat. The colonies were purified and characterized by gram staining and biochemical methods. The result of this study showed that three pathogens bacterial, including Proteus vulgaris, Escherichia coli, and Citrobacter freundii were identified from Uterine fluid of four Bali cattle.
The effect of purple sweet potato (Ipomea batatas L.) extract gel toward TNF-α expression and skin collagen density on rats (Rattus norvegicus) with open wound models
Authors: Ningrum D D , Padaga M C , Fauzi A
Published: January 2020

Open wound is a damage to the skin or tissues under the skin that can be caused by sharp objects or fights between animals. Purple sweet potato (Ipomea batatas L) contains some bioactive substances, such as anthocyanin and tannin, which help to prevent the prolongation of the inflammatory phase and increase fibroblast proliferation. The aim of this research was to determine the effect of purple sweet potato extract gel toward the expression of TNF-α and skin collagen density on rats with open wound model. The open wound was made circular using a modified Morton method. This study used a completely randomized design with 20 rats, Wistar strain aged 12 weeks, weighing 150-200 g, divided into 5 groups with 4 replicates. TNF-α expression observed in immunohistochemistry method and analyzed using one-way ANOVA statistical test, followed by Honestly Significant Difference Test. The density of collagen with Masson Trichome staining was analyzed by the Kruskal-Wallis nonparametric statistic test with Mann-Whitney-U test. The results showed that the purple sweet potato extract as a therapy for open wounds was significantly reduce the TNF-α expression and increase collagen density. The conclusion is that the purple sweet potato extract with 30% concentration is the most effective therapy in increasing collagen density but not very effective in reducing TNF-α expression.
The effect of fermented Glycine max (L.) Merr. to rats induced CCl4 toward hepatic IL-6 expression and ALT-AST level
Authors: Permata F S , Roosdiana A , Anggraini V O
Published: January 2020

Carbon tetrachloride (CCI4) is one of the hepatotoxic compounds that can cause hepatic fibrosis. Fermented soybean (Glycine max (L.) Merr.) has higher isoflavone and fibrinolytic enzymes that could degrade fibrin substrates. The aim of this research was to know the effect of fermented soybean (Glycine max (L.) Merr.,) to IL-6 expression and ALT-AST level in rats (Rattus novergicus) that induced by CCl4. The groups consist of negative control group, positive control group, 3 treatment groups which used dose 200, 400, 800 mg/kg BW. The treatments were conducted 2 mL/day along 14 days. Rats were euthanized then liver and serum were collected. The IL-6 expression of liver was measured by Immunohistochemistry and ASTALT level used spectrophotometer. The parameters were analyzed statistically quantitatively using one-way ANOVA and continued test of Post hoc Tukey (α = 0,05). The result showed that dose of 800 mg/kg BW was an effective dose which has the highest percentage reduction both of hepatic IL-6 expression (68,10%) and ALT-AST level 81,16% and 46,45% respectively. The effect was related isoflavone from fermented soybean that acted as anti-inflammatory. The conclusion was the fermented of soybean able to decrease the hepatic IL-6 expression and ALTAST level in induced CCl4 rats.
Antibiotic resistance profile of Staphylococcus aureus, Streptococcus spp. and Klebsiella spp. isolated form chicken farm in Bogor, Sukabumi, and Cianjur, West Java
Authors: Hermana N S P , Nilasari Z , Yuniarti E , Riyanto A , Safika  , Indrawati A , Pasaribu F H
Published: January 2020

West Java province has largest population of chicken poultry, with Bogor, Sukabumi, and Cianjur has highest chicken population. Farmers used antibiotics for prophylaxis and therapy to maintain the production. However, extensive use of antibiotic increased the number of antibiotic resistant bacteria. Staphylococcus aureus, Streptococcus spp, and Klebsiella spp are the example of flora normal in chicken that affected with abusive use of antibiotic. The aim of this study was to determine the antibiotic resistance profile of S. aureus, Streptococcus spp., and Klebsiella spp. isolated from cloacal swab of chicken poultry in 3 regions. Total of 320 samples were collected and the positive number of S. aureus, Streptococcus spp., and Klebsiella spp were 61, 8, and 58 isolates respectively. The result of antibiotics susceptibility test showed that S. aureus was resistant to ampicillin (98%), erythromycin (95%), nalidixic acid (93%), tetracycline (92%), oxytetracycline (90%), enrofloxacin (69%), and ciprofloxacin (56%). Streptococcus spp. was resistant to tetracycline (100%) and doxycycline (87.5%). Klebsiella spp. was resistant to erythromycin (100%), ampicillin (94.83%) oxytetracycline (93.10%), tetracycline and nalidixic acid (89.66%), enrofloxacin (86.21%), and ciprofloxacin (81.03%). S. aureus, Streptococcus spp., and Klebsiella spp. has a high level of resistance to antibiotics and most of the isolates were multi-resistant.
The differential account of white blood cell as an image of immune system from flying fox (Pteropus spp) as a reservoir host
Authors: Sa’diyah S N , Situmorang F J I C , Kholik
Published: January 2020

Flying fox (Pteropus spp) has been reported as a host reservoir of several microorganisms. Reservoir host is a species that serves primarily as a maintenance host for a pathogen related to the immune system. The purpose of this research is to describe the white blood cells differential account of Flying-foxes as a picture of the immune system and bioindicator of environmental changes. The Bloods are collected from The two adult Flying fox bats in December 2018. They were bought from a hunter in Wera Village, Bima district, Sumbawa Island. The Blood samples were collected from the axillaries vein of the bat for blood smears. The blood smears were Giemsa stained then examined for The white blood cells differential counts. The differential white blood cell (WBC) counts (%) of blood smear of Flying foxes are Eosinophils (2.25±1.71%), Neutrophils (14.00±2.45%), Basophils (13.75±4.11%), Monocytes (29.75±4.99%), and a Lymphocytes (40.25±9.03%). The highest percentage of Lymphocytes describe of the effectors of adaptive immunity and the highest percentage of Monocytes describe of the effectors of innate immunity. The lymphocytes and monocytes have an important role in the immune system and can be bio-indicator of environmental changes.
Prevalence of fasciolosis emphasis on age, origin, body condition and post mortem by geographic information systems on sacrificial examination in Malang District – East Java
Authors: Kusumarini S R , Permata F S , Widyaputri T , Prasetyo D
Published: January 2020

Infection with Fasciola gigantica, a liver trematode, is frequently reported in Malang district. The study was aimed to determine the prevalence of fascioliasis in Malang District, East Java during Eid Qurban 2019. Data were collected from 68 cutting points in 9 sub-districts. A total of 265 cows, 895 goats and 112 sheep than analyzed based on questioner emphasis on age, origin, body condition, and postmortem abnormalities. Overall the highest prevalence of fasciolosis was 57% cattle and 18% goat in Gondanglegi sub-district and 100% sheep in Wajak sub-district. A total of 86% of fasciolosis in cattle have good body conditions came from Malang District. There was also 82% in goat and 78% in sheep infected came from Malang District too. Morphological and postmortem examination findings that 53% of adult cattle (2-3 years), adult goat and sheep (1-1,5 years) were 78% and 89% respectively have abnormalities in the liver. This data showed adult livestock more resistant to fasciolosis infection. From that data above that further surveys should be carried out to understanding on the epidemiology of fascioliasis in the study area and classified risk factors affecting the infection.
Improvement of maternal and child health status through the design of posyandu mobile service application in kelurahan pancoran mas depok city
Authors: Suzana Dona , Dharmayanti  , Ridho Rachmi
Published: January 2020

Indicators in assessing the success of health services and health development programs are the maternal mortality, infant and children under five years old mortality. Comprehensive handling is very important and beginning of nutrition care in pregnancy. Posyandu (Integrated services center for mothers and children under five years) as a form of institution that involves community participation in maternal and toddler health problems is the spearhead for reducing this mortality rate. The cooperation between Puskesmas (Community Health Centers) and Posyandu in public health supervision issues required good communication and clear reporting so that problems arise can be handled quickly Therefore, it takes an application system that can bridge communication between the two institutions in the prevention of maternal and child mortality, nutrition problems, especially malnutrition and stunting in children. The mobile-based application is expected to help public health supervision by integrating the performance of posyandu cadres, midwives and doctors in Kelurahan Pancoran Mas, Depok City.
An optimized model for classification of appropriate technology products using neural networks and genetic algorithms
Authors: Rais  , Somantri Oman , Afriliana Ida , Budihartono Eko , Khambali Mohammad
Published: January 2020

The background of this research is the difficulty faced when classifying the result of the assesment in the event Competition Appropriate Technology Tegal City. In this paper, the classification result of the assesment is carried out by categorizing the result of technology product that are suitable for implementation in small to medium industries by using the model. The model proposed in this study is using the Neural Network (NN) method to be able to classify products whether into appropriate technology for small/medium industries. Neural Network can produce a low level of accuracy, but Neural Network optimized based on Genetics Algoritm can produced a level of accuracy more higher than without optimation. The genetic algorithm (GA) is proposed to optimize the value of Neural Network parameters such as the number of hidden layers and learning rates. Based on the results of the experiments that have been produced, and system validation using the 10 Fold cross-validation trial shows that the Neural Network method that optimizes the genetic algorithm produces an accuracy rate of 91.37%, better than the Neural Network method without optimization which is equal to 90, 14%.