UIN (Universitas Islam Negeri) Sunan Kalijaga, Yogyakarta: E-Journal Fakultas Sains dan Teknologi
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Bryophyte Diversity in Sawit Hiking Trails of Mount Andong, Magelang Regency
No full textThis research aims were to determine the types of bryophyte plants in Sawit Hiking Trails of Mount Andong, Magelang Regency. This diversity study resulted in 28 genera from 21 bryophyte plant families. The Pottiaceae and Brachytheciaceae families were the ones with the highest number of genera, namely 3 genera; Polytrichaceae, Dicranaceae, and Br
yaceae consist of 2 genera; and other families only 1
genera. The most common bryophyte are Bryophyta were previously known as mosses
Studies on Mitotic Division of Allium ascalonicum L. Based on Observation Time
No full textCell is the little functional structure of living thing. It has important benefit of life. All of body activity is controlled by the genetic material in cell, as an example is cell reproduction. Cell Reproduction is an enhancing of cell generation by cell division (mitotic). Cell division of iving thing has different time each other. It depend to composition of material genetic comlpex and the environment factor such as nutrition, temperature and light intencity. So that it make difficult to learn about the process of mitotic division. Therefore this research has purpose to find the effective time of mitotic divison and learn about the mitotic division process. This research was conducted by using chromosomal preparation method and mitotic index calculation. The sample of this research is Allium ascaloniicum L. (shallot). Based on the research that has been done, Allium ascalonicum L. has highest mitotic index in afternoon at 12.00 WIB with percentage 31,6%. In evening at 15.00 WIB it has 28,3% and in morning at 09.00 WIB it has 18,4 %. The mitotic division consist of 5 phase, prophase, prometaphase, metaphase, anaphase, and telophase
Analysis of Institutional Aspects of Operation and Maintenance of Micro Hydro Power Plant Case Study in Sumba Island - NTT
No full textOne strategy is to support the government to increase Electrification Ratio by utilizing Renewable Energy amidst the limitations of The State Electricity Company (PLN – Perusahaan Listrik Negara) to reach outermost and remote rural locations. Sumba Island is one of the areas with the lowest Electrification Ratio but has abundant natural resources for the development of renewable energy power plants. One of the Renewable Energy potentials being developed on Sumba Island is a Micro Hydro Power Plant. Renewable Energy issues are not only in demand supply but also on the sustainability of operation and maintenance. Several villages with electrification programs using Renewable Energy have experienced problems in terms of sustainable operation and maintenance due to the lack of strong institutions that manage the plants that have been built. This research was developed to answer the problems that have been mentioned with the aim of identifying and analysing the aspects that drive the institutional performance of Micro Hydro Power Plant operation and maintenance in Sumba Island, NTT (Nusa Tenggara Timur) Province. The results of the research are important aspects in institutional determination and maintenance that will support the elements of forming a sustainable institutional pattern as input for all stakeholders, especially the government in order to increase the national Electrification Ratio
Environmental Impacts of Shrimp Farming and Benefit of Pond Intensification for Sustainable Aquaculture: A Review
No full textThe goal of sustainable aquaculture is to provide a continued supply farmed aquatic nutrients beneficial for human sustenance without harming existing ecosystems or exceeding the ability of the planet to renew the natural resources required for aquaculture production (Nevin, 2020). Shrimp is the single most valuable seafood product that enters world trade today. Some of these farms are built in mangrove areas. To accommodate for this high demand farmers, intensify their production, thus effecting the environment by surpassing the areas carrying capacity. Factory farming, has the potential to deplete soils, reduces genetic stock, degrades coastal ecosystems and local water quality. These problems are mainly associated with pondconstruction and operation (Bolanos, 1999). Shrimp aquaculture can be environmentally sustainable with the proper design, operation, management, and monitoring. The use of a closed or recirculating system for growing shrimp is the best method for protecting the environment. Water quality needs to also be checked for both semi-intensive and intensive systems for managing the health of the shrimp and preventing disease and viral outbreaks. PAS offer a potential advantage over other culture systems because waste nutrients can recycle back into a crop, greatly increasing feed-use efficiency. Waste nutrients in ponds are assimilated by endogenous microflora, thereby transforming waste into a potential food source (biofloc). BFT is reliable for the cost effective, environment friendly fish production. BFT is a preferable technique for facing economic, ecological, and social issues relevant to current aquaculture. The system has advantage in intensive farming practices. An important feature of this technology is ammonia wastes are consumed by bacteria for their growth that increases the microbial biomass yield as well as improves the water quality. Previous studies indicated that the addition of probiotics in the water or feed increases growth, immunity, reduces animals to expose pathogenic bacteria and stops the growth of harmful pathogens. There is rapidly growing literature on the application of probiotics which indicates that it is one of the important methods developed to control disease at the farm; therefore, the addition of probiotics is common practice in fish farming (Daniel and Nageswari, 2017)
Tree Vegetation Analysis after 10 Years of Mount Merapi Eruption
No full textThe 2010 Mount Merapi eruption caused variety of damage level in Mount Merapi National Park (MMNP). Over time, composition of vegetation and carbon stocks continues to change towards a climax. The objective of this study is to analyze the vegetation composition and tree carbon stocks in MMNP forest land with variations of damage level forest land after 10 years of Mount Merapi eruption in 2010. Data collection was administered from December 2019 to January 2020 in Dlimas (heavy damage), Gandog (moderate damage) and Tritis (minor damage). Plot placement was determined randomly in each location by making the main plot of 20 x 100 m for large trees and a subplot of 5 x 40 m for small trees (poles, saplings, seedlings). The composition vegetation analysis was performed using an inverted J curve, Importance Value (IV) index and Shannon-Wiener Diversity Index (H\u27). The calculation of carbon stock and woody necromass (dead trees) using allometric equations. Based on the results of data analysis, there are 40 species from 34 families. Moderate damage location has the highest diversity index H’ for large trees of 0.45 and small trees of 2.23. The highest carbon stock of tree stands and woody necromass was in minor damage of 172.06 ton ha1, followed by moderate damage of 119.42 ton ha1 and minor damage as much as 10.29 ton ha1. Moderate and minor damage locations have curves that are close to inverted J shape with the density of seedlings and saplings more than large trees as a form of secondary forest regeneration. Abiotics correlated to carbon stock and tree density consist of air temperature, air humidity, soil pH, soil moisture, land slope and elevation. Ten years after the eruption, forests with moderate dan minor damage in MMNP Yogyakarta Province have high regeneration rate and carbon stock
Effect Contact Time Adsorption of Naphtol Dye Using Humic Acid Adsorbent Result of Peat Isolation from Kalimantan
No full textAdsorption of naphtol dye was carried out by using humic acid adsorbent from the isolation of Kalimantan peat. This study aims to determine the effect of the adsorption contact time on humic acid naphtol dyes from Kalimantan peat isolation. The purified humic acid isolation was characterized using Fourier Transform Infra-Red (FTIR), Scanning Electron Microscopy (SEM), Optical Microscopy, total acidity measurement, and measurement of -COOH (carboxylate) and -phenol OH groups. The characterized humic acid was then used as an adsorbent to adsorb the naphthol dye solution. The adsorption process was measured using a UV-Vis spectrophotometer to determine the concentration of adsorbed naphthol dye. The adsorption study of the research results showed that the optimum adsorption time of naphthol dye to humic acid was 45 minutes, this was because almost all naphtol dyes were adsorbed on humic acid
Locusts (Acrididae) Diversity in Gunung Bunder Forest Park
No full textThe aim of this study was to know the grasshopper diversity in Gunung Bunder Forest Park. Sampling plots were done by purposive sampling method. Grasshoppers were catched by a sweeping net and glue trapping. The result of the research were as follows: grasshopper diversity (H\u27=1.32), the number of individuals (n=1127), dominance index (D=0.4) and the species evenness index (E=0.55). Grasshopper species found are Phlaeoba fumosa, Stenocatantops splendens, Stenocatantops angustifrons, Eucoptacra sp., Chondracris rosea, Valanga nigricornis, Leptacris sp., Gastrimargus marmoratus, Trilophidia annulata, Oedaleus infernalis, Oxya japonica and Caryanda spuria
Simulation of Surface Plasmon Resonance Biosensor Based on Nanoparticle Coreshell in 633 nm
No full textIn this research, we developed the modeling and simulated the biosensor based on Surface Plasmon Resonance (SPR) phenomenon which detected the analyte i.e DNA. This SPR biosensor consists four layers where one of thus layers is the composite material. This nanocomposite spherical nanoparticle consisting of a spherical Fe3O4@Au core covered by Au shell, were applied as active material for DNA detection in 633 nm. Here, we present the simulation of detection amplification technique through Attenuated Total Reflection (ATR) spectrum. Here, SPR system using the Kretschmann configuration, whereas the dielectric function determination of composite coreshell nanoparticle using Effective Medium Theory approximation. Finally, the reflectivity calculation was investigated by varied the size of the core and the shell of the coreshell. The refractive index of the prism is 1,723; the refractive index of 40 nm Ag thin film is 0.13455+3,98651i and the refractive index of the composites were variated dependent the size of nanoparticle coreshell. Our results show that by varying the radius of core and shell thickness, the peak of the reflectivity (ATR spectrum) was shifted to the different angle of incident light. From its result, we can conclude that the addition of coreshell in SPR biosensor leads to enhancement the biosensor sensitivity in DNA detection
Food Analysis Labwork Guide as A Learning Media
No full textThis study aimed to produce practical guide labwork using a project-based learning models to know the quality of products and to produce practical guide that can be used as a learning media. The study consisted of a preliminary study in the form of carbohydrat tests such as: iodine test, seliwanoff\u27s test and moore test. Lipid solubility test within alcohol, ether and chloroform. Protein tests: biuret test, test and xanthoprotein ninhydrin test. Vitamin C tests: benedict test and iodine test. The results of the research were developed into a practical guide with coreldraw x6 software applications and Microsoft Word 2010 through the stages of data entry into the software developer, the preparation of layout and provision of the activity in laboratory. The final result of the product was a user-based food testing laboratory project. The product guide assess by a subject expert, a media expert, a biology teacher, 5 peer reviewers, while experts responded that module classified into "very good" with a percentage of 85.80%. The assessment from 20 students of class XI and XII High School get a percentage rating of 78.60% with good quality
Porosity Identification of Carbonate Core Reservoir Using Digital Rock Physics Method
No full textIndonesia is an archipelago country so rich with coral reefs that are a major component of the carbonate rock constituents. Where as much as 40% of carbonate rocks in Indonesia is a hydrocarbon reservoir is still rarely done exploration. This is because conventional hydrocarbon exploration technology has not been able to provide detailed information about the physical quantities. Hydrocarbon exploration technologies currently leads on digital technology to know the physical quantities of a reservoir of more detail such as porosity. Porosity which is physical quantities related to the presence of hydrocarbons in the pores of rocks. Digital Rock Physics (DRP) is a digital image-based method as an alternative method to find the physical quantities of rock samples to make it more effective and efficient. This study aims to identify the physical quantity using the method of porosity of the DRP until obtaining porosity of rock core carbonate reservoir by analyzing the binary image of the two rock cores from the same reservoir but has different dimensions to find out the exact core rocks to analyze the value of porosity. Binary image obtained from a scanned image of a projection of rock that has been reconstructed to become the greyscale image and have gone through the process of thresholding. The results of this study showed that the method can identify the physical quantities of DRP porosity and non-damaging rock pore structure (non-destructive). Analysis of the porosity of the rock core with histogram variations performed (by adjustingting the histogram), using the otsu method of thresholding and pixel size of the image has high (5.343750 μm) used to analyze the value of porosity. The porosity values acquired for 18.040 and has precision 96.20%