The effect of Mg/La co-doping addition on the caracteristics of TiO2 as photoelectrode have been studied. This study aims to investigate the effect of Mg/La co-doping concentration on the characteristics of TiO2. This study aims investigate the effect of Mg/La co-doping concentration on the characteristics of TiO2. Mg/La was varied from 0% mol, 0.4 / 0.6% mol, and 0.6 / 0.4% mol. Synthesis of TiO2 co-doping Mg/La was done by sol gel method. The resulting of powder pure TiO2 and co-doping Mg/La was made to paste, and was deposited on a glass substrate with a size of 2.5 x 2.5 cm and sintered at 600°C for 1 hour. Mg / La co-doped TiO2 layers were characterized using XRD, UV-Vis, and FTIR spectrometers. The results showed that TiO2 was the mos dominan phase appeared in pure TiO2 sample. The phase of MgO, MgTiO3, Mg2TiO4, and La2O3 were found in Mg/La co-doped TiO2 samples. The crystal size of Mg/La co-doped TiO2 was varied from 8.85 to 7.70 nm. In this research, we obtained that the energy gap was varied from 3.52 to 3.5 eV depent on co-dopant concentration. FTIR measurement showed groups of Ti-O, Ti-O-Ti, Ti-O-O, and H-O.
{"title":"PENGARUH PENAMBAHAN CO-DOPING Mg/La TERHADAP KARAKTERISASI TiO2 SEBAGAI FOTOELEKTRODA","authors":"Nurul Azmi, I. Ismail, M. Mursal","doi":"10.23960/JTAF.V9I1.2633","DOIUrl":"https://doi.org/10.23960/JTAF.V9I1.2633","url":null,"abstract":"The effect of Mg/La co-doping addition on the caracteristics of TiO2 as photoelectrode have been studied. This study aims to investigate the effect of Mg/La co-doping concentration on the characteristics of TiO2. This study aims investigate the effect of Mg/La co-doping concentration on the characteristics of TiO2. Mg/La was varied from 0% mol, 0.4 / 0.6% mol, and 0.6 / 0.4% mol. Synthesis of TiO2 co-doping Mg/La was done by sol gel method. The resulting of powder pure TiO2 and co-doping Mg/La was made to paste, and was deposited on a glass substrate with a size of 2.5 x 2.5 cm and sintered at 600°C for 1 hour. Mg / La co-doped TiO2 layers were characterized using XRD, UV-Vis, and FTIR spectrometers. The results showed that TiO2 was the mos dominan phase appeared in pure TiO2 sample. The phase of MgO, MgTiO3, Mg2TiO4, and La2O3 were found in Mg/La co-doped TiO2 samples. The crystal size of Mg/La co-doped TiO2 was varied from 8.85 to 7.70 nm. In this research, we obtained that the energy gap was varied from 3.52 to 3.5 eV depent on co-dopant concentration. FTIR measurement showed groups of Ti-O, Ti-O-Ti, Ti-O-O, and H-O.","PeriodicalId":314761,"journal":{"name":"Jurnal Teori dan Aplikasi Fisika","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132529138","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ZnO:Fe thin films has been successfully carried out by a simple spray pyrolysis method. The thin film was grown on ITO (Indium Tin Oxide) substrate with a metal-semiconductor-metal (MSM) structure. ZnO:Fe thin film characters as photodetector application include morphological structure, and electrical properties. SEM image results show the molarity difference can affect the particle size. The Current-Voltage (I-V) characterization shows that different solvent effects and molarity give different sensitivity. Sample ZnO:Fe 0.5M Ethanol has the highest sensitivity compared to other samples because it has a fairly low current and high bright current.
{"title":"Pengaruh Molaritas dalam Teknik Spray terhadap Performa Fotodetektor Berbasis ZnO","authors":"O. Maryana, Anisa Fitri, Mohamad Samsul Anrokhi, Wahyu Solafide Sipatuhar, Eka Nurfani","doi":"10.23960/JTAF.V9I1.2706","DOIUrl":"https://doi.org/10.23960/JTAF.V9I1.2706","url":null,"abstract":"ZnO:Fe thin films has been successfully carried out by a simple spray pyrolysis method. The thin film was grown on ITO (Indium Tin Oxide) substrate with a metal-semiconductor-metal (MSM) structure. ZnO:Fe thin film characters as photodetector application include morphological structure, and electrical properties. SEM image results show the molarity difference can affect the particle size. The Current-Voltage (I-V) characterization shows that different solvent effects and molarity give different sensitivity. Sample ZnO:Fe 0.5M Ethanol has the highest sensitivity compared to other samples because it has a fairly low current and high bright current.","PeriodicalId":314761,"journal":{"name":"Jurnal Teori dan Aplikasi Fisika","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116101823","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The titania synthesis of fluorine doping (F-TiO2) was carried out through the sol-gel method. Titanium isopropoxide (TTIP), tween-80, isopropanol and ammonium fluoride (NH4F) as sources of doping fluorine were used as the main ingredients. This research aimed to study the effect of fluorine doping injection rate using injection pumps on F-TiO2 photocatalyst activity. Four fluorine doping samples were prepared with the respective penetration rate of 0.4 ml / 30 minutes; 0.4 ml / 60 minutes; 0.4 ml / 90 minutes and 0.4 ml / 120 minutes. The titania powder was calcined at 450 oC for 5 hours. The sintered sample was tested for photodegradation of remazol yellow under UV light. Physical characteristics were analyzed using transmission electron microscopy (TEM) and Uv-Vis spectrophotometer. The results of the UV-Vis spectrophotometer showed that the particle size of samples with an injection rate of 0.4 ml / 90 minutes showed higher photocatalyst activity with particle sizes of (14 nm ± 4 nm).
采用溶胶-凝胶法制备氟掺杂(F-TiO2)的二氧化钛。以异丙醇钛(TTIP)、吐温-80、异丙醇和氟化铵(NH4F)作为掺杂氟的主要原料。本研究旨在研究注射泵注入氟掺杂速率对F-TiO2光催化剂活性的影响。以0.4 ml / 30 min的渗透速率制备4个氟掺杂样品;0.4 ml / 60分钟;0.4 ml / 90分钟和0.4 ml / 120分钟。将二氧化钛粉末在450℃下煅烧5小时。对烧结后的样品在紫外光下进行了雷马唑黄的光降解试验。采用透射电子显微镜(TEM)和紫外-可见分光光度计对其物理特性进行了分析。紫外可见分光光度计结果表明，当注射速度为0.4 ml / 90 min时，样品的光催化活性较高，粒径为(14 nm±4 nm)。
{"title":"Pengaruh Laju Penginjeksian Doping Fluor terhadap Aktivitas Fotokatalis Nanotitania Menggunakan Metode Sol Gel","authors":"Sri Rahayu, P. Manurung, Roniyus Marjunus","doi":"10.23960/jtaf.v8i2.2253","DOIUrl":"https://doi.org/10.23960/jtaf.v8i2.2253","url":null,"abstract":"The titania synthesis of fluorine doping (F-TiO2) was carried out through the sol-gel method. Titanium isopropoxide (TTIP), tween-80, isopropanol and ammonium fluoride (NH4F) as sources of doping fluorine were used as the main ingredients. This research aimed to study the effect of fluorine doping injection rate using injection pumps on F-TiO2 photocatalyst activity. Four fluorine doping samples were prepared with the respective penetration rate of 0.4 ml / 30 minutes; 0.4 ml / 60 minutes; 0.4 ml / 90 minutes and 0.4 ml / 120 minutes. The titania powder was calcined at 450 oC for 5 hours. The sintered sample was tested for photodegradation of remazol yellow under UV light. Physical characteristics were analyzed using transmission electron microscopy (TEM) and Uv-Vis spectrophotometer. The results of the UV-Vis spectrophotometer showed that the particle size of samples with an injection rate of 0.4 ml / 90 minutes showed higher photocatalyst activity with particle sizes of (14 nm ± 4 nm).","PeriodicalId":314761,"journal":{"name":"Jurnal Teori dan Aplikasi Fisika","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133383835","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The level of oxygen saturation in the blood is important to know the health condition of the body. If the human body lacks or excess oxygen, it will cause illness and other bodily system work disorders. One of the tools to detect the oxygen saturation level is the Pulse oximeter. Previous research has successfully designed a Pulse oximeter based on Arduino. The pulse oximeter produces a photoplethysmograph (PPG) signal that corresponds to the standard PPG signals in 20 test samples. PPG signals can be processed to provide information on oxygen saturation (SpO2) levels in the blood. In this research, validation of the Pulse oximeter is compared with a commercial pulse oximeter, the digital oximeter JZK-301. The results obtained from this validation are the smallest deviation errors are 4.83% while the largest errata is 22.51%. The greatest accuracy of 95.17%, of respondents number 16 and the smallest accuracy is 77, 49%, that is the number of respondents 12. The average deviation of 20 data is 12.82% with the resulting accuracy is 87, 18%. This indicates that the self-designed pulse oximeter has good efficiency and can be developed further
{"title":"Validasi Pulse oximeter dalam Penentuan Kadar Oksigen dalam Darah","authors":"Umi Salamah, Asna Nur Izziyah, A. Raharjo","doi":"10.23960/JTAF.V8I2.2588","DOIUrl":"https://doi.org/10.23960/JTAF.V8I2.2588","url":null,"abstract":"The level of oxygen saturation in the blood is important to know the health condition of the body. If the human body lacks or excess oxygen, it will cause illness and other bodily system work disorders. One of the tools to detect the oxygen saturation level is the Pulse oximeter. Previous research has successfully designed a Pulse oximeter based on Arduino. The pulse oximeter produces a photoplethysmograph (PPG) signal that corresponds to the standard PPG signals in 20 test samples. PPG signals can be processed to provide information on oxygen saturation (SpO2) levels in the blood. In this research, validation of the Pulse oximeter is compared with a commercial pulse oximeter, the digital oximeter JZK-301. The results obtained from this validation are the smallest deviation errors are 4.83% while the largest errata is 22.51%. The greatest accuracy of 95.17%, of respondents number 16 and the smallest accuracy is 77, 49%, that is the number of respondents 12. The average deviation of 20 data is 12.82% with the resulting accuracy is 87, 18%. This indicates that the self-designed pulse oximeter has good efficiency and can be developed further","PeriodicalId":314761,"journal":{"name":"Jurnal Teori dan Aplikasi Fisika","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130155058","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Sri Wahyu Suciyati, Gurum Ahmad Pauzi, J. Junaidi, L. Kamalia
Corrosion to the Zn electrode in the seawater accumulator system can be controlled by the cathodic protection of the sacrificial anode system. The mechanism is via anode sacrifice such as Al which has a negative potential connected to the Zn structure to provide extra electrons. The Zn electrode design is protected by an Al offering anode to form Cu-ZnAl electrode pairs arranged in series to form a seawater accumulator. Testing of electrodes with sacrificial anode system cathodic protection (Cu-ZnAl) compared to unprotected electrodes (Cu-Zn) for 48 hours showed no-load voltages of 10.19 V (Cu-Zn) and 12.89 V while the power generated was 48.36 mW and 49.37 mW. The average power after 3 watt LED loading was obtained 12.03 mW (day 1) and 12.56 mW (day 2) for the Cu-ZnAl electrode, while the Cu-Zn electrode obtained an average power of 6, 68 mW (day 1) and 10.09 mW (day 2). The corrosion rates after two days of using the Cu-Zn and Cu-ZnAl electrode pairs were obtained 0.008136 mm/year (Zn) and 0.0749626 mm/year (ZnAl).
{"title":"Proteksi Katodik pada Elektrode Zn Metode Sacrificial Anode untuk Peningkatan Kinerja Sistem Akumulator Air Laut","authors":"Sri Wahyu Suciyati, Gurum Ahmad Pauzi, J. Junaidi, L. Kamalia","doi":"10.23960/JTAF.V8I2.2557","DOIUrl":"https://doi.org/10.23960/JTAF.V8I2.2557","url":null,"abstract":"Corrosion to the Zn electrode in the seawater accumulator system can be controlled by the cathodic protection of the sacrificial anode system. The mechanism is via anode sacrifice such as Al which has a negative potential connected to the Zn structure to provide extra electrons. The Zn electrode design is protected by an Al offering anode to form Cu-ZnAl electrode pairs arranged in series to form a seawater accumulator. Testing of electrodes with sacrificial anode system cathodic protection (Cu-ZnAl) compared to unprotected electrodes (Cu-Zn) for 48 hours showed no-load voltages of 10.19 V (Cu-Zn) and 12.89 V while the power generated was 48.36 mW and 49.37 mW. The average power after 3 watt LED loading was obtained 12.03 mW (day 1) and 12.56 mW (day 2) for the Cu-ZnAl electrode, while the Cu-Zn electrode obtained an average power of 6, 68 mW (day 1) and 10.09 mW (day 2). The corrosion rates after two days of using the Cu-Zn and Cu-ZnAl electrode pairs were obtained 0.008136 mm/year (Zn) and 0.0749626 mm/year (ZnAl).","PeriodicalId":314761,"journal":{"name":"Jurnal Teori dan Aplikasi Fisika","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115007362","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. Mutmainnah, Imam Rofii, Misto Misto, Dewi Ulul Azmi
Characterization of LED and laser is very important to know the specifications. An electrical and optical characteristic study has been conducted on LED and Laser. The LED used are Ultrabright red, blue, green, red, yellow and white colors and red color laser sources. Based on the results of the study stated that the current and voltage values are almost linear for voltages above 3 volts, the smallest dark current value on white LED lights, yellow LED, and laser. Yellow LED has the biggest energy loss. The optical characteristics included FWHM (Full width at half maximum) , relative intensity and angle radiated maximum. The red LED has a FWHM value and the largest angle θo, while laser has the smallest FWHM and angle θo.
{"title":"Karakteristik Listrik dan Optik pada LED dan Laser","authors":"M. Mutmainnah, Imam Rofii, Misto Misto, Dewi Ulul Azmi","doi":"10.23960/JTAF.V8I2.2577","DOIUrl":"https://doi.org/10.23960/JTAF.V8I2.2577","url":null,"abstract":"Characterization of LED and laser is very important to know the specifications. An electrical and optical characteristic study has been conducted on LED and Laser. The LED used are Ultrabright red, blue, green, red, yellow and white colors and red color laser sources. Based on the results of the study stated that the current and voltage values are almost linear for voltages above 3 volts, the smallest dark current value on white LED lights, yellow LED, and laser. Yellow LED has the biggest energy loss. The optical characteristics included FWHM (Full width at half maximum) , relative intensity and angle radiated maximum. The red LED has a FWHM value and the largest angle θo, while laser has the smallest FWHM and angle θo.","PeriodicalId":314761,"journal":{"name":"Jurnal Teori dan Aplikasi Fisika","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122288543","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A Water Seal Drainage (WSD) design was made to remove air and fluid from the pleural cavity in the thorax (lung cavity) using a connecting tube or chest tube to maintain the negative pressure of the cavity. Under normal circumstances, the pleural cavity has negative pressure and only a little pleural fluid is filled. Suction pumps have a high pressure with a pressure range of -10 kPa to -80 kPa. The pressure is large enough so that it is not suitable for thorax because it can cause damage to internal organs due to high pressure. WSD specifically for thorax has a low pressure which is below -5 kPa / -40 mmHg. This WSD is equipped with a hand switch, water level and automatic Arduino Uno based exhaust system which has a pressure below -26.6 kPa / -20 cmHg to suction and pressure below -3.4 kPa / -2.6 cmHg to remove liquid from the bottle . The hand switch itself functions as a manual control to make it easier for the user, while the level sensor functions as a safety level for fluid levels in the tool and also an automatic fluid disposal system so that it is more efficient.
{"title":"Rancang Bangun Water Seal Drainage (WSD) Khusus Thorax","authors":"Diah Rahayu Ningtias, Bayu Wahyudi, Iqbal Firdaus","doi":"10.23960/JTAF.V8I2.2563","DOIUrl":"https://doi.org/10.23960/JTAF.V8I2.2563","url":null,"abstract":"A Water Seal Drainage (WSD) design was made to remove air and fluid from the pleural cavity in the thorax (lung cavity) using a connecting tube or chest tube to maintain the negative pressure of the cavity. Under normal circumstances, the pleural cavity has negative pressure and only a little pleural fluid is filled. Suction pumps have a high pressure with a pressure range of -10 kPa to -80 kPa. The pressure is large enough so that it is not suitable for thorax because it can cause damage to internal organs due to high pressure. WSD specifically for thorax has a low pressure which is below -5 kPa / -40 mmHg. This WSD is equipped with a hand switch, water level and automatic Arduino Uno based exhaust system which has a pressure below -26.6 kPa / -20 cmHg to suction and pressure below -3.4 kPa / -2.6 cmHg to remove liquid from the bottle . The hand switch itself functions as a manual control to make it easier for the user, while the level sensor functions as a safety level for fluid levels in the tool and also an automatic fluid disposal system so that it is more efficient.","PeriodicalId":314761,"journal":{"name":"Jurnal Teori dan Aplikasi Fisika","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123736252","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Research on molecular dynamics analysis of the influence of body temperature on HSA fluid volume balance using the Lennard-Jones potential model with temperature variations of 35 ℃, 37 ℃, and 40 ℃ in the form of cubic systems in GROMACS applications. The results show that the denaturation of HSA that is affected by body temperature causes changes in osmotic pressure in the body with changes in the balance of HSA fluid volume. At temperatures of 35 ℃ denaturations occurs Thr566 to Gln580 with a distance of 20.9 A, Lys444 to Met446 with a distance of 5.76 A, Asn61 to Cys62 with a distance of 3.9 A, Glu570 to Ser579 with a distance of 18.09 A, and Gly431 to Cys438 with a distance of 11.43 A. At a temperature of 37 ℃ denaturations occurs Ile513 to Cys514 has a distance of 3.75 A, Pro303 to Glu311 has a distance of 12.78 A, Asn267 to Ser270 has a distance of 4.65 A, Leu275 to Cys279 has a distance of 7 A At a temperature of 40 ℃ denaturations occurs Ser304 to Glu311 with a distance of 11.38 A, Asn267 to Ile271 with a distance of 7.75 A, Asn61 to Cys62 with a distance of 3.9 A, and Ala511 to Cys514 with a distance of 4.86 A. RMSD results shows that stable structural changes occur in HSA with values of 2.6–9.0 nm. And the Lennard-Jones average energy yield shows that the interaction behavior between HSA atoms is dynamic. At a temperature of 35 ℃ of 7.97E + 05 kJ/mol, a temperature of 37 ℃ of 6.78 kJ/mol, and a temperature of 40 ℃ of 7.89E + 05 kJ/mol.
在GROMACS应用中，采用Lennard-Jones势模型，在35℃、37℃和40℃条件下，以立方系统的形式分析体温对HSA体液体积平衡影响的分子动力学研究结果表明，受体温影响的HSA变性会引起体内渗透压的变化，从而改变HSA液量的平衡。在35℃温度下，Thr566到Gln580的变性距离为20.9 a, Lys444到Met446的变性距离为5.76 a, Asn61到Cys62的变性距离为3.9 a, Glu570到Ser579的变性距离为18.09 a, Gly431到Cys438的变性距离为11.43 a。的温度37℃变性发生Ile513 Cys514 3.75的距离,Pro303 Glu311 12.78的距离,Asn267 Ser270 4.65的距离,Leu275 Cys279距离为7的温度40℃变性发生Ser304 Glu311距离为11.38,Asn267 Ile271 7.75的距离,Asn61 Cys62 3.9的距离,和Ala511 Cys514距离为4.86 a。RMSD结果表明，HSA在2.6 ~ 9.0 nm范围内发生了稳定的结构变化。Lennard-Jones平均产能表明，HSA原子之间的相互作用是动态的。温度为35℃时为7.97E + 05 kJ/mol，温度为37℃时为6.78 kJ/mol，温度为40℃时为7.89E + 05 kJ/mol。
{"title":"Analisis Dinamika Molekuler Pengaruh Suhu Tubuh Terhadap Keseimbangan Volume Human Serum Albumin (HSA) Menggunakan Model Potensial Lennard-Jones","authors":"Muhammad Rasyid Sidik, Yanti Yulianti, Dwi Asmi","doi":"10.23960/JTAF.V8I2.2434","DOIUrl":"https://doi.org/10.23960/JTAF.V8I2.2434","url":null,"abstract":"Research on molecular dynamics analysis of the influence of body temperature on HSA fluid volume balance using the Lennard-Jones potential model with temperature variations of 35 ℃, 37 ℃, and 40 ℃ in the form of cubic systems in GROMACS applications. The results show that the denaturation of HSA that is affected by body temperature causes changes in osmotic pressure in the body with changes in the balance of HSA fluid volume. At temperatures of 35 ℃ denaturations occurs Thr566 to Gln580 with a distance of 20.9 A, Lys444 to Met446 with a distance of 5.76 A, Asn61 to Cys62 with a distance of 3.9 A, Glu570 to Ser579 with a distance of 18.09 A, and Gly431 to Cys438 with a distance of 11.43 A. At a temperature of 37 ℃ denaturations occurs Ile513 to Cys514 has a distance of 3.75 A, Pro303 to Glu311 has a distance of 12.78 A, Asn267 to Ser270 has a distance of 4.65 A, Leu275 to Cys279 has a distance of 7 A At a temperature of 40 ℃ denaturations occurs Ser304 to Glu311 with a distance of 11.38 A, Asn267 to Ile271 with a distance of 7.75 A, Asn61 to Cys62 with a distance of 3.9 A, and Ala511 to Cys514 with a distance of 4.86 A. RMSD results shows that stable structural changes occur in HSA with values of 2.6–9.0 nm. And the Lennard-Jones average energy yield shows that the interaction behavior between HSA atoms is dynamic. At a temperature of 35 ℃ of 7.97E + 05 kJ/mol, a temperature of 37 ℃ of 6.78 kJ/mol, and a temperature of 40 ℃ of 7.89E + 05 kJ/mol.","PeriodicalId":314761,"journal":{"name":"Jurnal Teori dan Aplikasi Fisika","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116866625","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Valentinus Galih Vidia Putra, Andrian Wijayono, J. N. Mohamad, I. Irwan, Cahaya Rosyidan
The application of physics, in particular, the topic of differential equations is commonly used in mathematics, physics, engineering, and various other sciences to explain a phenomenon in a system, to produce a form of simulation and prediction of a fairly good mathematical equation is needed. This paper examines the use of MATLAB / Simulink to assist in modeling the solution of the differential equation problems by providing a case of mathematical modeling in the analysis of the COVID-19 plague in Indonesia in 2020 with the modification of the Bernoulli equation. In this study, it can be concluded that MATLAB / Simulink can be used to solve differential equation problems with Bernoulli's modification in the case of COVID-19 plague modeling quite accurately.
{"title":"Penerapan Fisika Komputasi dengan MATLAB/Simulink pada Pemodelan Infeksi Wabah COVID-19 di Indonesia melalui Modifikasi Persamaan Differensial Bernoulli","authors":"Valentinus Galih Vidia Putra, Andrian Wijayono, J. N. Mohamad, I. Irwan, Cahaya Rosyidan","doi":"10.23960/JTAF.V8I2.2513","DOIUrl":"https://doi.org/10.23960/JTAF.V8I2.2513","url":null,"abstract":"The application of physics, in particular, the topic of differential equations is commonly used in mathematics, physics, engineering, and various other sciences to explain a phenomenon in a system, to produce a form of simulation and prediction of a fairly good mathematical equation is needed. This paper examines the use of MATLAB / Simulink to assist in modeling the solution of the differential equation problems by providing a case of mathematical modeling in the analysis of the COVID-19 plague in Indonesia in 2020 with the modification of the Bernoulli equation. In this study, it can be concluded that MATLAB / Simulink can be used to solve differential equation problems with Bernoulli's modification in the case of COVID-19 plague modeling quite accurately.","PeriodicalId":314761,"journal":{"name":"Jurnal Teori dan Aplikasi Fisika","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121768537","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Electrical energy is one of the primer facilities used in every activity. Almost all the existing facilities use electricity. This is inversely proportional to the depleting energy source. The solution to this problem is to replace fossil fuels with renewable energy sources. Renewable energy is a source of energy that can be recycled and does not damage the environment. One type of renewable energy is to use the electrolysis method. Electrolysis Method is one of the renewable energy sources. This method uses electrolyte solution which can be found in sour and runny fruit such as lemon (Citrus Limon L.) and Wuluh Star fruit (Averrhoa bilimbi). The study was conducted in a laboratory by mixing the results of the juice of the two fruits with different compositions. The mixes are placed in the arcs (a mixture container to test the electrical properties) and then tested using a multimeter every 2 hours for 24 hours. The results are described in graphical form. The average power of each mixture is, C1 = 2.2mW, C2 = 4.7mW, and C3 = 8.5 mW and based on the graph, each mixture has decreased voltage and current. Even so among the three mixtures, the third mixture has a better electrical power value than the other two mixes. This shows that the higher the acidity of a solution the higher the electricity produced.
{"title":"Analisis Karakteristik Kelistrikan Campuran Belimbing Wuluh dan Jeruk Lemon Sebagai Sumber Listrik","authors":"Dady Sulaiman, Wibowo Romadhoni, Arlina Arlina","doi":"10.23960/JTAF.V8I2.2485","DOIUrl":"https://doi.org/10.23960/JTAF.V8I2.2485","url":null,"abstract":"Electrical energy is one of the primer facilities used in every activity. Almost all the existing facilities use electricity. This is inversely proportional to the depleting energy source. The solution to this problem is to replace fossil fuels with renewable energy sources. Renewable energy is a source of energy that can be recycled and does not damage the environment. One type of renewable energy is to use the electrolysis method. Electrolysis Method is one of the renewable energy sources. This method uses electrolyte solution which can be found in sour and runny fruit such as lemon (Citrus Limon L.) and Wuluh Star fruit (Averrhoa bilimbi). The study was conducted in a laboratory by mixing the results of the juice of the two fruits with different compositions. The mixes are placed in the arcs (a mixture container to test the electrical properties) and then tested using a multimeter every 2 hours for 24 hours. The results are described in graphical form. The average power of each mixture is, C1 = 2.2mW, C2 = 4.7mW, and C3 = 8.5 mW and based on the graph, each mixture has decreased voltage and current. Even so among the three mixtures, the third mixture has a better electrical power value than the other two mixes. This shows that the higher the acidity of a solution the higher the electricity produced.","PeriodicalId":314761,"journal":{"name":"Jurnal Teori dan Aplikasi Fisika","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128354881","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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