Rice is a commodity which production continues to be increased in Indonesia due to the increasing demand and consumption per capita. The use of intensive agriculture and inorganic fertilizers that leave residues on th...
Rice is a commodity which production continues to be increased in Indonesia due to the increasing demand and consumption per capita. The use of intensive agriculture and inorganic fertilizers that leave residues on the land makes fertilizers ineffective. Tobacco plants commonly used as pesticides can be used as organic materials that can increase rice growth because they contain nutrients and various allelochemical compounds. This study aims to determine the effect of tobacco extract application at various concentrations and interval combination treatments on growth parameters consisting of plant height rate, number of tillers, number of leaves, root dry weight, shoot dry weight, shoot-root ratio, flowering period, and the concentration of phytohormones (IAA and GA3) in rice (Oryza sativa) variety Inpari 32. The study was conducted by the application of tobacco extract consisting of 9 treatments which were a combination of concentration (1-3ml/L) and intervals application (1x in 1-3 weeks) and one control (without the administration of tobacco extract) for a total of 10 treatments, with three replications of each treatment. The results showed that the combination of concentration and interval of applications of tobacco extract had no significant effect on the parameters of plant height, tiller number, leaf number, shoot dry weight, flowering period, and phytohormones (IAA and GA3) concentrations in rice (Oryza sativa) Inpari 32 variety, and affect the parameters of dry root weight and shoot-root ratio slightly.
Aluminium in water treatment sludge can be recovered as coagulants by acidification method. However, there are some factors that affect efficiency in recovering aluminium, such as stirring speed during acidification, ...
Aluminium in water treatment sludge can be recovered as coagulants by acidification method. However, there are some factors that affect efficiency in recovering aluminium, such as stirring speed during acidification, pH, and sludge characteristic. This study aims to find the optimum acidification stirring speed in recovering alum and to evaluate the performance of recovered coagulant compared to a pure coagulant. Aluminium recovery is carried out by adding sulphuric acid until the pH of the sludge reaches 2.5. The acidic sludge is stirred for 30 minutes, with acidification stirring speed is varied from 240–720 rpm, and left for settling until the supernatant is formed. The supernatant was used as a recovered coagulant, examined using a jar test to determine the optimum dose, and compared with the pure coagulant. The results show that the optimum acidification stirring speed was obtained at 540 rpm, where mass balance shows aluminium recovery efficiency of 16.5%. The optimum dose for recovered coagulant was 25 ppm, with a turbidity reduction of 93.38% in jar test. While the optimum dose for pure alum was 20 ppm, with turbidity reduction of 93.26%. Though potentially reduced higher turbidity, the recovered coagulant has slightly lower quality than the pure coagulant, which required a higher optimum dose.
Magnesium alloys like one of the bioabsorbable implant materials expected to help heal tissue without implant residues, therefore are no need to take the implant for a second surgery. One of the expected performances ...
Magnesium alloys like one of the bioabsorbable implant materials expected to help heal tissue without implant residues, therefore are no need to take the implant for a second surgery. One of the expected performances of metal implants is its ability to support cancellous bone growth, namely porous bone that encloses large spaces and has a spongy nature or appearance, therefore metallic magnesium foams are used in bone implants to approach the natural structure of bones. This study aims to evaluate the effect of dolomite (CaMg(CO3)2) size as a foaming agent to produce porosity on Mg-6Zn alloy. Powder metallurgy is used to produce metallic magnesium foams. Magnesium powder 0.06-0.3 mm granulometry mixed with zinc powder <63 µm granulometry and dolomite powder with varying sizes 20, 25, and 30 mesh. The mixed powder was compacted and sintered at varying temperatures of 650, 675, and 700°C. The smallest porosity is found in the Mg6Zn10CaMg(CO3)2 alloy with a #25 mesh foaming size and a sintering temperature of 650°C, or 10.77%. Meanwhile, the highest porosity was found in the mesh alloy Mg-6Zn-10CaMg(CO3)2 #20 with a sintered temperature of 700°C, or 53.26%. These results indicate that the higher the sintering temperature in the alloy, the greater the percentage of pores formed and the smaller the density value produced in the alloy.
Management of patient data at the Technical Implementation Unit of the Community Health Center (UPT. Puskesmas) of Rhee Sumbawa District has not been fully computerized. The need for the development of an Information ...
Management of patient data at the Technical Implementation Unit of the Community Health Center (UPT. Puskesmas) of Rhee Sumbawa District has not been fully computerized. The need for the development of an Information System to store medical records (history) of patient data. The research aims to develop information systems with descriptive research methods. For software development methods using Waterfall Models and built with Microsoft Visual Studio C# software and databases stored in Microsoft SQL Server software. Software testing uses Black Box Testing, which is testing software in functional terms. The results of research into digital data technology products that function to enter, change, delete data and minimize the time to find the data needed to improve the effectiveness and efficiency of data management.
Building performance can be improved by investigating and evaluating previews of occupant behavior. Post-occupancy evaluation (POE) is a design analysis method used to direct and evaluate the physical and social eleme...
Building performance can be improved by investigating and evaluating previews of occupant behavior. Post-occupancy evaluation (POE) is a design analysis method used to direct and evaluate the physical and social elements of inhabited buildings. In recent years, the Ministry of Public Works and Public Housing grants student dormitory building to several Indonesian universities. In 2017, Institut Teknologi Sumatera (ITERA) Bandar Lampung Indonesia has been granted two of those student facilities. The building has been operated for three years. The student dormitory considered has one type of building that has a high capacity occupation. This research aims to measure user satisfaction and evaluate building facility and its implication to student learning effectively using the POE method, specifically human behavior aspects. During this time, POE is more focused on building physical behavior that includes energy and thermal aspects. In this study, the author tries to raise aspects of human behavior as an essential element supporting the sustainability of the building. The survey conducted using eight variables: territoriality, privacy, interaction, perception, crowdedness, adaptability, durability, and comfortability. This research focuses on measuring only female student dormitories. One hundred eighty-two respondents were involved in the survey. The result shows that the majority of respondents feel quite satisfied with all the variable measure. This finding can be a reference to improve the design consideration for future student dormitory design.
Flood in Jakarta is occurred almost every year due to inadequate flood control systems to the flood prediction, inadequate drainage system, and trash that clog the drainage. The increase of rainfall is also one of the...
Flood in Jakarta is occurred almost every year due to inadequate flood control systems to the flood prediction, inadequate drainage system, and trash that clog the drainage. The increase of rainfall is also one of the causes of flooding. That changing rainfall characteristics can affect river flow. This study aims to analyze the trend of rainfall in different time frames and its effect to flood discharge. The extreme rainfall trend is analyzed for every 15 years period from rainfall data of 1985 to 2019 for several return periods. Three period is selected for trend analysis and compared to the baseline data (1985-2019). Based on the analysis, the extreme rainfall for 1995-2009 and 2005-2019 period compared to the baseline is increased for all return periods. The increasing percentage is approximately 3-10% and 5-16% respectively. Since the extreme rainfall is increased, the design discharge is also increased for all return periods. The increasing percentage for 1995-2009 and 2005-2019 period compared to the baseline is 4-12% and 7-19% respectively. However, the design rainfall and discharge for the period 1985-1999 is lower than the baseline.
The use of fiber reinforced polymer (FRP) has been implemented as an alternative for strengthening and repairing methods. Nowadays, the use of natural material for FRP has been developed in order to minimize the disad...
The use of fiber reinforced polymer (FRP) has been implemented as an alternative for strengthening and repairing methods. Nowadays, the use of natural material for FRP has been developed in order to minimize the disadvantage effects to nature due to synthetic FRP material and economic reason. In this paper, an experimental study was carried out to evaluate the bond strength of abaca fiber as natural reinforced polymer (NFRP) material in reinforced concrete (RC) beams. The test specimen was a beam that had cross-section area of 100 × 100mm2 and 300mm length. Single rebar was used in this study with 10mm diameter of rebar. Artificial crack was applied in order to consider the initial crack by using cardboard between the concrete. Two externally bonded strengthened beams with a different type of abaca fiber arrangement, bond length, and thickness were applied on the concrete surface. The test was conducted by applying a tension load on the beam until the specimen reach its failure. The results showed that the bond strength decrease as the bond length becomes longer because the maximum load was almost constant for different bond length. The maximum load was approximately around 4 tf for short and long bond length. The compatibility of abaca fiber and rebar was also monitored. Both abaca fiber and rebar able to stand the load compactly. Abaca fiber composite laminate had a similar trend with rebar at the same location where an artificial crack was made. Furthermore, the arrangement and thickness of the abaca fiber composite laminate affected the results.
There are many uses of natural ingredients to find out their potential in overcoming Coronavirus Disease 2019. One of the plants that is often used to treat various diseases, including SARS-Cov2 infection is turmeric....
There are many uses of natural ingredients to find out their potential in overcoming Coronavirus Disease 2019. One of the plants that is often used to treat various diseases, including SARS-Cov2 infection is turmeric. Turmeric contains Tetrahydroxycurcumin compounds. The aim of this research was to study the potential of Tetrahydroxycurcumin in preventing infection with the SARS-CoV-2 virus. The results showed that Tetrahydroxicurcumin has the potential to inhibit Tyrosine protein kinase ABL1, which is a protein that plays a role in the preparation of the cytoskeleton during viral infection. The binding affinity of Tetrahydroxycurcumin for this protein is -8.4 kcal/mol.
Sorghum is one of the plants that can be processed into functional beverages containing elements of nutrients or non-nutrients that provide positive effects on health of the body. A descriptive qualitative research, t...
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