bluuebunny/crossref_metadata_2025_split huggingface dataset:
Physicochemical properties of colloidal Ag/PVA nanoparticles synthesized by gamma irradiation
Authors: Wiguna P.A. , Djuhana D. , Imawan C. , Umar A. 
Published: January 2020

Abstract
Silver nanoparticles (Ag NPs) are widely studied because of their superior properties so they are extensively used in various applications. Structural modification with the right synthesis method is the key to obtain superior properties of Ag NPs. In this experiment, gamma irradiation methods have been used to synthesize Ag NPs. The synthesis solution was prepared from a solution of silver metal nitrate salts with a molarity of 10 mM and then mixed in a polyvinyl alcohol (PVA) solution. The irradiation process was carried out in the Cobalt-60 gamma source chamber at a range dose from 0 to 10 kGy with a dose rate of 4.6 kGy/h. This process has caused the solution turns to yellow indicating the formation of Ag/PVA colloidal nanoparticles. The Ag/PVA nanoparticles were characterized using UV-Vis spectrophotometer and Transmission Electron Microscopy. The UV-Vis spectra showed the localized surface plasmon resonance at wavelengths of 420-407 nm. The intensity of the absorption peak increases with increasing gamma dose and reaches a maximum value starting at a dose of 4 kGy. The TEM images showed the shape of Ag NPs is spherical with an average particle size getting bigger with increasing irradiation dose.
Evaluation corrosion behavior on commercial stainless steel SS 304 in Nano fluids water-Al2O3 system at different pH by Electrochemical Impedance Spectroscopy methods
Authors: Djoko Hadi Prajitno , Umar Efrizon , Dani Gustaman Syarif 
Published: January 2020

Abstract
The corrosion behavior on commercial stainless steel SS 304 in Nano fluids water-Al2O3 system at pH 3 until 7 conditions has been investigated using electrochemical methods. The electrochemical tests were performed with and without the addition chlor to adjust of pH Nano fluid condition. The pH of nano fluid for testing corrosion stainless steel 304 are 3.18,.3.65, and 5. 9. The electrochemical technique used in this study, were open circuit potential (OCP), galvanodynamic polarization and electrochemical impedance spectroscopy (EIS). The results of open circuit potential tests showed that the corrosion potential (Ecorr) values of stainless steel 304 in nanofluid at three pH values are slightly different between pH neutral and acidic. At pH 5.9 corrosion potential more positive compare with at acid pH 3.18. The positive potential of corrosion potential at pH 5.9 due to development of chromium oxide (Cr2O3) film formed on stainless steel is more stable in 5.9 than in acidic with the presence of Cl. However, galvanodynamic polarization of stainless steel SS 304 in nanofluid showed that the lowest corrosion of stainless steel SS 304 in nanofluid at pH 5.9 than stainless steel at condition in acidic pH 3.18 and 3.65. EIS study shows that stainless steel SS 304 in nanofluid showed the higher impedance at higher pH than at in acidic condition at lower pH. The higher impedance indicated that the passive film of Cr2O3 formed on the surface of stainless steel and reduce corrosion rate. In terms of corrosion rate values, stainless steel alloy showed the best corrosion rate in low pH nanofluid compared with high pH value. This shows that the interaction between Nano fluids and the stainless steel have no significant effect onto its corrosion behavior.
Optimization of sputtered Au film on grating structure as SERS substrate for detection of pesticide
Authors: Ulum A H , Destarina L , Aminah N S , Srisuai N , Boonruang S , Nuntawong N , Horprathum M , Djamal M 
Published: January 2020

Abstract
Here, we report an efficient approach to optimize the performance of surface enhanced Raman scattering (SERS) substrate. The geometry of the SERS substrate consists of the Au film deposited on polymer grating. The SERS substrate were fabricated by the laser interference lithography (LIL) and magnetron sputtering of Au thin films. The effect of the Au thin film prepared by magnetron sputtering at different deposition time (5-180 s) and operated pressure (3-5 mTorr). The morphology of the obtained samples was observed by field-emission scanning electron microscopy (FE-SEM). The results indicated that optimal SERS substrate with deposition time of 180 s and 3 mTorr-operated pressure was obtained. The limit of detection for methylene blue (MB) and methyl parathion were evaluated at 10-4 M and 10-2 M, respectively. Moreover, our SERS substrate shows the application of a portable Raman spectrophotometer which also promising for on-site pesticide substance detection.
Design Multi Field Electromagnet Based on Copper Plate with Single Electric Current
Authors: Wardoyo Sony , Djamal Mitra , Budiman Maman , Ming Kian 
Published: January 2020

Abstract
The magnetic fields produced by an electromagnet depends on the amount of current and voltage. A single current source can produce multi-field magnetic fields, the position of the solenoid connected to the electric current source, where there are multi connectors that can be switched based on the composition of the helical coil and from the data obtained that this can proved. This research was carried out in a helical and design of copper plates forming solenoid windings, each part of the partition plate numbered 10, 15, 20, and 30 connected to electric currents of 1.5, 3, and 4.5 Ampere and the switch functioned to flow electric current to the partition based on the number of electromagnet plates. The experimental results obtained that the number of plates can produce multi magnetic field with a single current source with a range 0 to 8 mT which is measured using Gaussmeter. The benefits of this research will have impact on physical and engineering research related to the use of electromagnets that are portable and concise but with a single electric current source with multi magnetic fields, besides the next research has the potential to be developed in order to produce high magnetic fields.
Spatial Correlation between Land Surface Properties and Cloud Characteristics in Indonesia
Authors: Tampubolon Togi , Yanti Jeddah , Liu Chian-Yi 
Published: January 2020

AbstractThe change of surface vegetation also links to the evapotranspiration pattern so that the moisture flux might be affected by the atmospheric stratiform or convective clouds, meant to be important in balancing hydrological cycle and the more analysing is necessary to explain this phenomenon. The aim of this paper to analyze the complex phenomenon that link in spatial correlation of cloud response towards land surface change that ensued from cloud microphysical components. Fourteen years from 2003 to 2016 over Indonesia was applied that issued by Moderate-Resolution Imaging Spectroradiometer (MODIS) level-3 (L3) provides both cloud and land surface products. Cloud microphysical features consist of cloud fraction, cloud top pressure, cloud optical thickness, and cloud effective radius, whereas Normalized Difference Vegetation Index (NDVI) was applied to identify the land surface change. The distribution of spatial correlation and probability distribution function are used as the method to determine each cloud microphysical components response to land surface change. Concerning annual result, desirable connections among correlation between NDVI and cloud parameters is rather widely. Probabilistic approach from statistical analysis in the wet season forms palpably pattern (parabolic pattern) rather than a dry season pattern. Correlation values based on spatial analysis between NDVI anomalies and cloud parameter anomalies have a range of values around -0.8 to 0.8. Throughout Indonesia, every correlation between NDVI anomalies and cloud parameter anomalies has a negative correlation. Sumatra, Kalimantan and Papua have a major role to inject negative correlations. This causes this area to be covered with oil palm plantations.
Development of a glass melting furnace with online control systems
Authors: Wongwan W. , Keawkao J. , Boonin K. , Sa-Ardsin W. , Wongwan W.N. 
Published: January 2020

Abstract
In this research, a small glass melting furnace was built with a dimension of 12 x 12 x 9 cm3. The tracking control and notification systems were developed using the Arduino board running through the internet. The 1.2-mm wires were twisted into the 8.3-mm heating coils with the resistance 12.0. When 11.0-A current was applied to the heating coil, the furnace can be operated at maximum heating rate around 5.7 / min. and max continuous operating temperature at 1200. After the test run of this furnace and control system, it was found that this apparatus can be used as a replacement of a traditional one. Furthermore the cost of this furnace is cheaper than a traditional one up to 17 times.
Gravitational Waves in Minkowski Spacetime Background
Authors: Dewi Wulandari , Triyanta  
Published: January 2020

Abstract
One contribution of Einstein’s equation is the existence of gravitational waves. The weak gravitational waves are solutions of the linearized Einstein’s equation around a Minkowski spacetime. By using a certain coordinate freedom, waves propagate at the speed of light and propagating plane waves in z-direction gives two polarization states. The geodesic equation gives an oscillating proper distance of two rest particles when gravitational wave passes, while for proper time, no time dilatation meaning each particle has the same proper time. The fluctuation effect of gravitational waves causes ripples in spacetime making each particle feels a tidal acceleration.
Improvement of Understanding Physics Concept Using Cooperative Model of STAD Type and Mapping Concept Model
Authors: Henry Dinus Hutabarat , Ferawati Artauli Hasibuan 
Published: January 2020

Abstract
Understanding the concept of physics can be influenced by methods used in the learning process. With the cooperative method of type STAD and mapping concept can be seen the level of understanding of physics concept. Both methods are applied to the physics learning process in SMA Negeri 2 Padangsidimpuan class XI semester 2. This test was conducted on two classes with a total of 64 students. This class is divided into control classes and experimental classes. Samples were taken using purposive sampling. From sampling it can be seen that the average pretest on the experimental class is 71.9 and posttets 77.8. So that the average understanding of students who are given an inkuri treatment method is 28.38%. While the average pretets on the control class 65.8 and posttets 72.19. The average increase in the learning outcomes of students given an expository method is 15.02%. Based on test calculation result of t

Count
> t

Table
, or > 1.677. This means Ha
is acceptable, that is, there is a cooperative influence of the STAD type to understand the physics concept of students.
Natural Red Dyes From Hibiscuss sabdariffa L. Calyxes Extract For Gamma-Rays Detector
Authors: Indah Nursyamsi Handayani , Listyarini Arie , Imawan Cuk 
Published: January 2020

Abstract
Detection of absorbed dose in materials were irradiated is one method for monitoring irradiation processes. Dyes that are sensitive to ionizing radiation has the potential to used as radiation detectors. This article will report on the fabrication of gamma-rays detector using natural red dyes obtained from Hibiscus sabdariffa L. (HS) calyxes extract. The HS extract solution was made using a simple extraction method which was carried out by soaking the dried HS calyxes with double distilled water as a solvent for 24 hours. Gammacell irradiator with Cobalt-60 radiation source was used to test the sensitivity of HS extract solution to gamma radiation with a dose of 1-10 kGy. UV-Vis spectrophotometer was used to the characterization of optical properties of HS extract solution. After gamma irradiation, it was observed the color of the HS extract solution faded slightly from dark red to more transparent red color along with increasing doses. The results of UV-Vis characterization showed maximum absorbance of HS extract solution at 523 nm and a decrease in absorbance of 95% after irradiation at a dose of 10 kGy. The HS extract solution is stable in the conditions of storage is not exposed light and at the refrigerator up to 30 days.
The Preventive Effect of Rome Beauty Variety Apple Skin Extract on Blood Urea Nitrogen (BUN) levels of Rat (Rattus norvegicus) Induced by Lead (Pb)
Authors: Nadhrata G E , Pratama D A O A , Haskito A E P 
Published: January 2020

Abstract
Lead (Pb) is a heavy metal that can cause poisoning in living things. Pb contamination that enters the body through the digestive system will bind to erythrocytes and trigger an increase in ROS the body resulting in a decrease in organ function such as the kidneys followed by an increase in levels of BUN. Apple is an example of a fruit that rich in antioxidant. Apple skin contains flavonoids which act as antioxidants and as chelating agent for metal ion. The parameters observed in this study were BUN levels. This study consist of 5 groups with each group consisting of 4 white rats, namely negative control, positive control with 10 mg Pb / head / day of Pb administration for 14 days, and preventive therapy group with Rome Beauty apple skin extract 28 mg/200g, 56 mg/200g, and 112 mg/200g for 21 days and giving lead at a dose of 10 mg/rat/day for 14 days. BUN levels were analyzed using one way ANOVA method which was followed by Turkey. The results showed that the preventive group of apple skin extract of Rome Beauty variety with a dose of 112 mg/200g was able to prevent an increase in BUN levels.
Pathology change of dropsy syndrome in Koi Fish (Cyprinus carpio) at IBAT Punten Batu
Authors: Haryo A , Nurhidayati R 
Published: January 2020

Abstract
Dropsy can be identified from loose scales from the body of a fish. Dropsy fish are having trouble swimming, breathe, and has a bulging belly. Bad water conditions can trigger Dropsy symptom in Koi fish. The method in this examination, make macroscopic observations that are compared with the literature and proceed by making histopathological preparations with daily routine staining which is then observed microscopically. Number of sample is one fish, sampling with a big population. The purpose of this study is to examine macroscopic and microscopic pathological conditions on fish with dropsy syndrome. The organs examined include the gills, skins, and kidney. Pathological changes that occur in these organs are hyperplasia, telangiectasia, dermatitis, and granuloma nephritis. The conclusion of this research, that Koi fish (Cyprinus carpio) positive suspect Dropsy Syndrome.
The effect of ionic silver water (Ag+) toward TNF-α (Tumor Necrosis Factor-α) expression and epidermal thickness in open wound healing rat (Rattus norvegicus) model
Authors: Dewi D P , Purwatiningsih W , Aryani D E , Widodo E , Vidiastuti D 
Published: January 2020

AbstractIncision wounds are one type of open wounds that occur caused by a sharp instruments such as a result of medical procedure in surgery process. At the time of injury, body will naturally heal that wounds through three phases, inflammation, proliferation, and maturation (remodeling). Ag (silver) solution can accelerate wound healing because it has antibacterial properties and will increase fibroblast cells production. This study aims to determine the effect of Ag (silver) solution based on expression TNF-α (Tumor Necrosis Factor-a) and epidermal thickness in incision wound of the white rat (Rattus norvegicus) Wistar strain. The experimental animals were male white rat Wistar strains weighing 150-250 grams, aged 8-12 weeks divided into 4 groups. Negative control group without treatment. P1 group that is incised and treated by 10%Povidone Iodinewith doses 0,5 ml. P2 group that incised and treated by Ag (silver) solution with doses 0,5 ml. P3 group that incised and treated by combination between 0,5 ml ag (silver) solution and 0,5 mlPovidone Iodine.All treatments was given for seven days. TNF-α expression was measured using the Flowcytometry method and epidermal thickness was observed histopathologically by Haematoxyllen Eosin (HE) staining. Data analysis TNF-α expression was performed by Kruskal Wallis test while epidermal thickness were analyzed by one way ANOVA test and tukey follow-up test with 95% confidence level (α = 0.05). The results of this study showed that combination therapy of Povidone Iodine 10% and Ag solution tends to decrease TNF-α expression and showed increasing cell regeneration of the epidermis in terms of epidermal thickness. The conclusion of this study is that combination therapy can accelerate the wound healing process.
Rush Pin Method For Fracture Os. Femur And Luxatio Reposition Of Caput Femur in A Cat at DNA Animal Clinic Bogor
Authors: Dwirinta M L , Waspada S D , Permanawati  , Satriawan I , Vidiastuti D , Purwatiningsih W 
Published: January 2020

Abstract
Fracture is the severity or destruction of bone continuity and the type of extent that usually caused by trauma. The aim of study was to aplication rush pin for fracture os femur and repocition of luxatio caput femur. Examination methods used to make the diagnose were physical examination, radiography and and cell blood count test. The radiography result showed that transversal fracture distal os. Fermoris and luxatio caput femur, the result of CBC there were no abnormality. Treatment for this case was surgery using the rush pin method to installing intermedulary pins (IM) in condylus os femur. It was used two pins with cross placement. Reposition of luxatio caput femur with simple interupted suture to apotition the caput femur with ligament. After surgery cat was administrated with antibiotic, analgesic, and supplement to support the condition of the cat as post surgery therapy. The conclusion of this study is instalation of pin can repaair transversal fracture os femur, because rush pin keep the bone to right position better than singgle pin and luxatio caput femur was corrected.
Beneficial Effect of Ethanol Extract from Black Rice on Endothelin-1 Expression and Histological Structure of Heart during Pre-eclampsia
Authors: Oktanella Y , Sulistyanigrum I , Aulanni’am  , Oktavianie D A , Firmawati A , Aryani D E , Hendrawan V F , Purwatiningsih W , Vidiastuti D 
Published: January 2020

Abstract
In the case of pre-eclampsia, abnormality form also be found in the heart, which is later can be diagnosed as a particular symptom, hypertension. Endothelin-1, potential vasoconstrictor derived from heart, responsible to the mechanism of indirect impairment utero- spiral arteries into development of generalized endothelial dysfunction. This study was designed to identify the effect of ethanol extract from black rice in pre-eclamptic model rat, specifically related to its ability to maintain physiological activity of cardiovascular system. In this study, animal model was induced by multi-dose of tryponil sulphate 70mg/kgBW at 9th, 10th, 11th day of pregnancy, and the groups were devided into negative and positive control, treatment groups: P1, P2, P3 differed by ethanol extract dosages (12,5mg/kgBW, 25mg/kgBW, 50mg/kgBW respectively). Treatment started from day 12th to 18th of pregnancy, continued by statistical analysis to examined endothelin-1 immunohistochemistry expression using one way ANOVA and Tuckey-Test. This study indicated both the lowest expression of endothelin-1 and the normal structure of heart myofibrils, after histological examination, were identically displayed at P3 (50mg/kgBW ethanol extract) among groups. According to this study, we suggested that the ethanol extract of black rice possibly has certain compound either directly or indirectly induced cardiovascular changes during pre-eclamptic condition.
Preventive potency of sumbawa forest honey on rats exposed by lead acetate based on liver histopathology and AST-ALT level
Authors: Herawati  , Widiarko Olenka P , Permata Fajar S 
Published: January 2020

Abstract
Many cattle are kept in near garbage dump and eat waste product. The cattle will exposure free radical of lead. Sumbawa forest honey contains flavonoids as antioxidant that neutralize the excess free radicals in the body. This research aimed to examine the preventive potency of Sumbawa forest honey toward liver histopathology and AST-ALT level on rats induced by lead acetate. The subject research were rats Wistar, male and age 8-12 weeks. The rats divided in 5 different groups, those were negative control group; positive control group that exposed by lead acetate; and preventive therapy groups with Sumbawa forest honey dose of 25 mg/kgBW, 50 mg/kgBW and 75 mg/kgBW for 28 days and administered with lead acetate dose of 10 mg/day for 14 days. AST-ALT levels were measured by spectrophotometer then analyzed statistically by One Way ANOVA and Tukey test (p<0.05). Liver histopathology was examined descriptively on HE stained. The result showed the forest honey Sumbawa dose 75 mg/kg BW was able to prevent ALT-AST elevation significantly (p<0.05) and reduced the injury of liver tissue on rats exposed lead. The conclusion was the Sumbawa forest honey can be used as a preventative to inhibit the liver injury because of Lead exposure.
Cochran Q-Test for Criteria Validation of PeGI Framework
Authors: Napitupulu Darmawan 
Published: January 2020

AbstractThe research objective is to find out the valid criteria of the PeGI framework in evaluating the application of e-Government in Indonesia. The method used was a survey with the Cochran Q-Test approach involving 5 respondents. The results showed that there were 3 invalid PeGI criteria because the Cochran value was greater than the Chie table so that they were eliminated from the list of criteria thus leaving only 32 valid of PeGI criteria. The implications of the research can provide recommendations for government agencies to use the more relevant PeGI framework.
Wireless X-ray Machine Control Based on Arduino with Kv Parameters
Authors: Wijaya Nur Hudha , Budimansyah  , Sukwono Djoko 
Published: January 2020

Abstract
High voltage (kV) on an X-ray machine is the voltage produced by the High Tension Transformer (HTT) which will give a potential difference to the X-ray machine’s tube. Regional General Hospitals (RSUD) in Indonesia still widely use X-ray machines with analog systems as kV selection. This will result in the radiographer being exposed to radiation continuously when running the X-ray machine because they have to operate the tool directly. The many uses of cables on analog systems are still less efficient, therefore a wireless X-ray machine controller is designed that can reduce radiation exposure to radiographers, and reduce the use of cables on X-ray machines. This study uses Personal Computer (PC) as a place to set parameter values, namely kV. Serial communication using Bluetooth HC-05, minimum system uses ATmega 328p IC and data processing on PC using Delphi application. Measurements on the device use a multimeter to determine the input voltage for HTT. The measurement results of the parameters 60 kV, 65 kV, 70 kV, 75 kV, and 80 kV obtained the smallest correction value is 0.15 kV on the 75 kV parameter and the largest is 1.66 kV on the 65 kV parameter. The correction value is still within the tolerance value range of ± 1kV. In the measurement of distance the farthest results obtained by 6 meters with a barrier wall thickness of 9.5 cm.