bluuebunny/crossref_metadata_2025 huggingface dataset:
Pollutant load capacity of Situ Parigi, Banten Province
Authors: Zharifa A , Fachrul M F , Hendrawan D I
Published: December 2019

Situ Parigi is located in Parigi Lama Village, Pondok Aren District, South Tangerang City. Based on the water quality measurements of Situ Parigi, BOD parameter has the highest concentration. This indicates that the type of waste that enters this water body is dominated by organic waste produced from domestic activities surrounding. The purpose of this study is to determine the pollutant load capacity of BOD in Situ Parigi. Pollutant load capacity is calculated using formulas in Minister of Environment Regulation No. 28 of 2009 concerning Capacity of Lake Water Pollution and/or Reservoir Load. Situ Parigi has an area of 4 Ha, an average depth of 0.98 m, a debit of 0.023 m3/sec and a hydraulic residence time of 18.25 days. Based on the calculations results, the pollutant load capacity of Situ Parigi is 3,169.81 kg/year but must accommodate a load of 20,553.15 kg/year. These results show that the pollution that occurs in Situ Parigi has exceeded its capacity. Control strategies such as dredging work and the construction of communal wastewater treatment plants could be carried out in an effort to reduce the occurring pollution levels.
Removal of heavy metal (Cu2+) by Thiobacillus sp. and Clostridium sp. at various temperatures and concentration of pollutant in liquid media
Authors: Vernans A K R , Iswanto B , Rinanti A
Published: December 2019

This research was conducted to remove heavy metal Cu2+ using bioremediation method with the utilization of mix culture of bacterium Thiobacillus sp and Clostridium sp. It started with the cultivation of artificial liquid growth media, Stone Mineral Salt solution (SMSs) using temperature (oC) and pollutant concentration of heavy metal Cu2+ (ppm) as the test parameters. The analysis was conducted with Atomic Absorption Spectrophotometry (AAS) to determine the concentration of heavy metal Cu2+ at the beginning and end of the research in order to calculate its removal efficiency. The exponential phase of mix bacterial culture growth was observed on day 5 with a pH value of 7. Furthermore, the culture was discovered to have the ability to live in several temperatures (oC) of 20, 25, 30 and 35, and remove heavy metal Cu2+ at 89.10%; 91.27%; 92%; and 90.27% respectively. The results also showed that at a contact time of 48 hours, the temperature of 30oC, and Cu2+ pollutant concentration of 25, 50, 75, 100 ppm, the mix bacterial culture could remove the pollutant up to efficiency above 90%. Moreover, a higher concentration of the pollutant in liquid media was found to lead to lower efficiency of removal, but at a value above 90%. Therefore, the use of biotechnology approach in this research is expected to give a scientific contribution to the processing of wastewater containing heavy metal Cu2+.
Preliminary study to determine the glucose levels in cassava peel waste (Manihot esculenta Crantz) as a result of enzymatic activities of fungi Aspergillus fumigatus
Authors: Jatnika P A , Ratnaningsih R , Rinanti A
Published: December 2019

The aim of this study was to utilize cassava peel waste, with a lignin content of 19% as a raw material for bioethanol. The process of obtaining bioethanol from this material was conducted in 4 stages, and these include pretreatment/delignification, hydrolysis, fermentation, and distillation. The delignification was conducted using fungi Aspergillus fumigatus in Potato Dextrose Broth media and 40 mesh was prepared. Moreover, the pretreatment process was conducted by varying the ratio of cassava peel powder as a substrats to fungi at 1:1, 2:1, and 1:2 and at contact times of 1, 3, and 5 days and analyzed through the use of Chesson method. Moreover, the hydrolysis stage used variations of sulfuric acid (H2SO4) at 1, 3, 5% (v/v) heated at 100°C with contact time varied at 30, 60, and 90 minutes. The process was further analyzed by using the DNS method to obtain sugar levels. The result therefore showed the best lignin content after pretreatment to be 8% and the delignification of cassava peel was obtained from the enzymatic activity of A. fumigatus. It was also discovered that 10 g/L of sugar was produced from the total sample used. However, further research is needed to increase the sugar content of cassava peel raw material.
Delignification and determination of sugar concentration in fertilizer as the preliminary process of bioethanol production by Aspergillus fumigatus
Authors: Lois K , Iswanto B , Rinanti A
Published: December 2019

Water hyacinth is an aquatic weed that causes an imbalance of the ecosystem hence, it needs to be processed into useful products. This research conducted the degradation of lignocellulose-containing biomass, utilizing Aspergillus fumigatus fungi to form bioethanol. This study was initiated with the cultivation of A. fumigatus in Potato Dextrose Broth media and the preparation of water hyacinth as a substrate up to 25 mesh in size. Pretreatment was carried out using varying ratios of fungi to substrate of 1: 1, 1: 5, and 1:10 and contact time is 24, 72, and 120 hours. Furthermore, the lignin level was determined using the gravimetric method and hydrolysis was carried out afterwards in order to prepare the sugar for the fermentation procedure. The sugar content produced was analyzed using the DNS method. In this study, the highest allowance for lignin at the pretreatment stage was 25.9%, this produced the highest sugar at the hydrolysis stage (0.5 g/L). Fungi A. fumigatus functions as a biocatalyst which is suitable in the delignification process as a pretreatment and hydrolysis. A fermentation procedure and further research is needed to determine the potential of water hyacinth as a raw material in the production of bioethanol.
Analysis of land cover changes after the eruption of mount Sinabung using satellite imagery
Authors: Setiawan C , Muzani M , Warnadi W , A’Rachman F R , Qismaraga Q
Published: December 2019

After hundreds of years experiencing a dormant period, Mount Sinabung erupted again in August 2010 to the last recorded in June 2018. Within eight years, significant land cover changes were seen in the area around Mount Sinabung. This study aims to analyse changes in affected areas using satellite imagery. The spatial analysis method is used to determine changes in various land cover. High-resolution images before the 2010 eruption and the latest recording images of 2019 are used as analytical material. The analysis shows that the affected area is in east-southeast and south-southeast directions of the peak of Mount Sinabung. In the east-southeast direction, the eruption material reaches 3.5 km and 4 km in the south-southeast with an area more than eleven thousand hectares. Some villages such as Bekerah, Simacem, and Suka Meriah have even been lost covered by material from the eruption of Mount Sinabung. The area is generally covered by pyroclastic materials in the form of ash, sand, lapilli, and bombs. Most of the areas affected by the eruption are plantation areas, then forest areas and settlements areas. The conclusion are Sinabung eruption in recent years has had a very significant impact on various aspects, one of which is land cover.
Analysis of load variation on chicken slaughterhouse waste water treatment using GAS-SBR
Authors: Septiana I , Siami L , Tazkiaturrizki T , Hadisoebroto R , Ratnaningsih R
Published: December 2019

In general, chicken slaughterhouses have capacity of slaughtering more than 40,000 chickens per day so its produce a high waste water. It takes sewage treatment appropriate technology, Granular Aerobic Sludge which use Sequencing Batch Reactor (GAS-SBR) due to the high of BOD and COD. The purpose of this research was to explore GAS ability in decreasing parameter of COD, BOD, TSS and ammonia. The initial concentration COD influent was 6,406.4 mg/L then it was varied into three concentrations were 6,144 mg/L (100%), 4,608 mg/L (75%) and 3,072 mg/L (50%) of diluted pure water. As the result with four hours’ aeration time, the highest removal of 100% BOD load was 56.25% and an effluent was 1,400 mg/L. The highest removal of 50% COD load was 75% and an effluent was 768 mg/L. The highest removal of 100% TSS load was 36.73% an effluent was 1.79 mg/L. And the highest removal of 75% Ammonia load was 67.91% and an effluent was 1.11 mg/L. The parameter for the TSS and ammonia have meet the quality ministry environment no.5 2014 law for slaughterhouses, while the BOD and COD parameters are exceeding the standards due to its high organic content.
The alternative solutions of bagasse to improve Indonesian oil production in low salinity
Authors: Fattahanisa A , Setiati R , Kasmungin S , Ristawati A
Published: December 2019

Indonesia is one of the largest sugarcane producing countries in the world. At present, the use of bagasse is only as compost, electricity generation, etc. In the oil industry, bagasse can use as a base material in making surfactants that function as fluid reservoir oil injection to improve oil recovery factors, so it is good to develop a type of plant-based local surfactant with a lot of raw materials in Indonesia. The purpose of this study was to see that bagasse can increase the oil recovery factor at low salinity. The methods used is a laboratory study using a concentration of 1%; 1.5%; 2%; 2.5% and 3% NaLS and salinity of 4000 ppm, 5000 ppm, and 15000 ppm NaCl. The Surfactant first conducted a compatibility test then core flooding was carried out to obtain the recovery factor value. The results obtained were surfactants with variations of 1.5% 4000 ppm; 1.0% 15000 ppm; and 1.5% 15000 ppm which passes the compatibility test with the recovery factor value sequentially is 3.24%; 3.62%; and 5.34%. It shows that NaLS surfactant can increase the oil recovery factor at low salinity by 5.34% by optimizing 1.5% NaLS 15000 ppm concentration.
The alternative solutions of bagasse waste utilization to improve recovery factors in reservoir with high salinity
Authors: Ristawati A , Setiati R , Kasmungin S , Fattahanisa A
Published: December 2019

Surfactant injection is one of the EOR methods used to increase oil recovery. Using of surfactants is intended to reduce the interface tension between oil and water. The types of surfactants commonly used are oil-based surfactants, such as petroleum sulfonate. This condition causes the price of surfactants very dependent on oil prices. As efficient alternative, research on plant-based surfactants sourced from nature is being developed. Like the type of surfactant that will be used in this study is Sodium Lignosulfonate (NaLS) sourced from bagasse waste. The purpose of this study is to add reference of the characteristics of the NaLS surfactant to be used optimally. The screenings in this experiment were Aqueous Stability test, phase behaviour test, and IFT test on 1.5% NaLS concentration and high salinity 75,000 ppm Nacl. The results of aqueous stability test are transparent, the results of phase behaviour test are middle phase emulsion with an emulsion percent of 8.75%, and the results of IFT test obtained value of 1.98 mN/m. Based on these results, surfactants meet the screening parameters so can proceed to the injection stage for determine the value of recovery factor. Recovery factor result for NaLS bagasse waste based surfactant injection is 4.74%.
The effect of aeration time on chicken slaughterhouse water treatment using GAS-SBR
Authors: Oktafani B , Siami L , Hadisoebroto R , Tazkiaturrizki T , Ratnaningsih R
Published: December 2019

Granular Activated Sludge - Sequencing Batch Reactor (GAS- SBR) has the ability to treat wastewater with high organic content. This study was conducted to determine the effect of aeration time in setting aside parameters COD, BOD, TSS and Total Ammonia in chicken slaughterhouse wastewater. Chicken slaughterhouse waste water used in this processing is artificial waste water made from a mixture of sucrose, KNO3 and KH2PO4. GAS formation is cultured by reacting activated sludge with stirring (20 rpm). SBR has a total work volume of 45L which is operated in 5 stages (fill – 0,25 hours, aeration time varied for 2 hours, 4 hours and 6 hours, settle - 0.25 hours, draw - 0.25 hours and idle - 6 hour). The results showed that the variation of aeration time for 2 hours resulted in the efficiency of removing COD obtained was 72.83% (influent of 6016 mg / L), BOD was 72.23% (influent of 3614 mg / L) and TSS 59.8% (influent of 2, 8 mg / L). While the variation of aeration time for 4 hours resulted in a total ammonia removal efficiency of 65.85% (influent of 2.29 mg / L).
The role of instructional leadership for students pro-ecology behaviour
Authors: Nadiroh N , Hanubun M A , Budiaman B , Komarudin K , Maharan S D
Published: December 2019

Environmental protection and recovery are the main challenges facing our society today, therefore it is important to know and understand more about pro-ecology behaviour, and what factors influence it. The study was conducted to explain the effect between Instructional Leadership on Student Pro-ecology Behaviour Quantitative method was used to analyse the results. In addition to this, the survey also used through expose fact studies. The sampling was carried out by means of multistage random sampling using the selected 100 students of MAN 6 East Jakarta. From 100 people divided into two groups that gave an assessment of Instructional Leadership below the average of 50 people and above the average of 50 people. Data analysis using t-test to test whether there is influence between Instructional Leadership on Pro-ecology Behaviour. Two opinion instruments have been developed which produce new concepts about Instructional Leadership and pro-ecology behaviour, each of which is 30 items that are valid and realiable. distribution of descriptive and inferential data. The next finding is the influence between Instructional Leadership on the Pro-ecology Behaviour that is significant (t = 1.83> t table = 1.67 α 0.05 df: 48). This shows a high or low level of positivity. The student pro-ecology behaviour was not caused by its assessment of the Melian Instructional Leadership Teacher but because of other factors. Other factors are recommended for further research both internal and external factors. The massive external factor influencing students is probably social media in the era of industrial revolution 4.0.
Compost of oil palm empty fruit bunches with coastal mud and rice husk biochar to improve the acid sulphate soil fertility
Authors: Andayani S , Hayat E S , Hayati R , Kurniawan H M , Noerhartati E , Irianti A T P
Published: December 2019

The research purposes: (1) Producing enriched compost of oil palm Empty Fruit Bunches (EFB) with coastal mud and rice husk biochar that is suitable for application to acid sulphate soils, (2) Getting the best dosage to increase acid sulphate soil fertility. The method used: complete random design (CRD) factorial pattern, the first factor composition of enriched oil palm EFB compost, second factor: doses of compost enriched. Data analysis using analysis of Varian (ANOVA), significant differences continued with Honestly Signiant Difference Test (HSD). The variables observed were: soil pH H2O, Each-Al, Total-N, Bray-P and each-K. The results showed: compost oil palm EFB treatment significantly affected the each-K, whilst did not significantly affect the pH H2O, Total-N, Bray-P and each-Al. Although enriched compost treatment did not significantly, and the finding is the treatment enriched compost trend to increased pH H2O, Total-N and Bray-P.
Understanding the application of sustainable development goals in oil and gas business activities
Authors: Hamzah U S
Published: December 2019

The oil and gas industry is the centre of the global economy and many national economies, including in developed and developing countries. This is also important for sustainable development, because oil and gas are the main pillars of the global energy system and, as such, are drivers of economic and social development. By mapping the linkages between the oil and gas industry and the Sustainable Development Goals (SDGs), the aim of this study is to encourage oil and gas companies to further incorporate relevant SDGs into their businesses and operations, validate their current efforts and trigger ideas. Oil and gas business activities that are in line with the sustainable development agenda can lead to greater efficiency, cost savings and competitiveness, and increase social permits to operate. The method used is to analyze the achievement of SDGs by paying attention to past experience and expectations of potential oil and gas activities going forward in efforts to achieve operational, environmental and social sustainability. Results of this study are to increase understanding of the relationship between SDGs and oil and gas business activities. Conclusion of this study is to emphasize that the oil and gas industry has the potential to contribute to the 17 SDGs.
Effect of Java Long Pepper Extract (Piper Retrofractum) on Spermatozoa Motility of Mustika Common Carp (Cyprinus CarpioL.)
Authors: Yeni B B , Abinawanto A
Published: December 2019

Java long pepper is a plant has an aphrodisiac effect. The extract containsa are cytosterol and piperine which capable of affecting there productive hormone for fish. The purpose of this study to find the optimum concentration of java long pepper extract on spermatozoa motility of mustika common carp. Java long pepper extract was injected by intramuscularly on the first of week with the concentration are 0.9ml kg−1, 1.8ml kg−1, and 3.6ml kg−1 of body weight, respectively. SnGrH (ovaprim) with the concentration is 0.3mlkg−1 bodyweight was administered as a positive control, whereas 0.3 ml of sodium solution was applied as a negative one. The result was observed in the second of week. Based on the ANOVA test showed that java long pepper extract has a significant effect on spermatozoa motility of mustika common carp (P<0.05). Further, according to the Tukey test that the highest spermatozoa motility rate was yield from a concentration 0.9 ml of java long pepper extract kg−1 body weight (69.5±1.24%).
Composition and abundance of Bivalves in the intertidal zone, Karang Papak Coastal, West Java, Indonesia: Based on lunar phase
Authors: Paujiah E , Cahyanto T , Sariningsih I , Maspupah M , Suryani Y
Published: December 2019

This study aims to determine the types and abundance of Bivalves in the Intertidal Zone, Karang Papak Beach, West Java, Indonesia. This research was conducted in November 2018. The method of sampling used line transects (line transects) systematically using a 1 x 1 meter quadrant. All types of bivalves found in the quadrant are calculated and identified. The results showed that there were 2 types of bivalves found in the study sites, namely M. micropterus and M. arenaria. The calculation results of the abundance index value indicate that between stations have different values. Abundance based on the moon phase shows that the highest abundance in both species is found in the dark moon phase, this is related to environmental conditions such as the influence of light and the availability of food resources. This data can be used as additional information in determining the management of aquatic resources in that location.
Potency of Cajuput Leaf Waste as additional feed concentrate
Authors: Widiana A , Hasby R M , Ukit U
Published: December 2019

Utilization of Cajuput leaf waste as a sheep feed, especially protein content (10.65%) has not met the SNI standard (> 15%). The addition of concentrate with high protein content is expected to increase the protein content in feed and improving the quality of feed (especially ammonia (NH3) production in rumen). The purpose of this research was to know the effect of addition of concentrate in increasing the protein content and also the potential of Cajuput leaves waste mixture with field grass as a sheep feedby in vitro test. The experiment used a complete randomized design with three treatments (R1 = 50% field grass + 50% concentrate; R2 = 25% Cajuput leaves waste + 25% field grass + 50% concentrate; R3 = 50% Cajuput leaves waste + 50% concentrate) with four repetitions. Statistics test with Anova followed by Duncan test. The results showed that the addition of concentrate to mixtured of waste Cajuput leaves, field grass, and concentrrate can increased the protein content in feed and affected to the production of NH3, VFA, and the digestibility of feed. From various aspects, treatment of R2 most likely to be used for sheep feed.
Screening of Ligninolytic activity of some Basidiomycota from domestic Oil Palm Plantation in Bogor
Authors: Sepwin N S , Fijai A , Mulyaningsih Y
Published: December 2019

Lignin is an essential bio-polymer which is required in the formation of plant cell wall. The degradation of lignin in the nature is a major challenge due to the complexity of its structure. It has been long known that white rot fungi produce ligninolytic enzyme that can degrade lignin efficiently. To identify white rot fungi, screening test was carried out by testing different strains of Basidiomycota using czapek dox agar supplemented with Guaiacol (0,02%). The results showed that two out of thirteen strains of Basidiomycota have ligninolytic activity. In this study, we successfully obtained two strains that have ligninolytic activity. In terms of ligninolytic activity, the potency index of phenol oxidation was higher in SP1 which accounts for 4.30, meanwhile, SP13 only reached potency index of 0.94. This study sheds light on further observation of these strains which potentially can be used for lignocellulose waste treatment especially oil palm empty fruit bunch (OPEFB) to produce valuable product.
Detection of ligninolytic capability of isolated fungi from decayed root and stem of oil palm tree
Authors: Fijai A , Mulyaningsih Y , Sepwin N S , Aditiya H B
Published: December 2019

Lignin is difficult to be decomposed due to its extensive polymerization carbon chain. Previous studies have discovered that ligninolytic enzymes effectively degrade lignin waste. Numerous microorganism such as white rot fungi which belong to basidiomycetes have been taken into account to accelerate the decomposition process of lignin. The aim of this study is to detect the capability of the fungi which were isolated from decayed root and stem of oil palm tree. Qualitative test using guaiacol 0.02 % and quantitative test using agar with supplemented tannic acid test were carried out to observe the ligninolytic capability and potency index of fungal isolates. Out of ten isolates, AKS 5 and PLP 3 were found to be positive strains and grouped to basidiomycetes division. The potency index revealed was higher in AKS 5. Successful of this study could be used as baseline information of potential fungi which are able to degrade lignin waste in the environment.
The diversity of fauna in mangrove community: Success replanting of mangroves species in South Coastal East Lombok, Indonesia
Authors: Idrus A A , Syukur A , Zulkifli L
Published: December 2019

Mangrove is a plant species that grow in a unique environment and serve as breeding, spawning, hatching, and nursery grounds for many marine species. However, the damage of mangrove has a negative impact on the diversity of fauna associated. This study aims to prove and evaluate mangrove replanting of fauna diversity on the South Coast of East Lombok and the geographical position of 116 ° 27 “0”´ 116 ° 30´´´ LU and - 8 ° 48´0´´-8 ° 51´0´. Data collection were done through observation, surveys and quadrant methods. The data were further analyzed to detemine Diversity Index (H‵) and Dominance Index (D). The results of the analysis show that in the first cluster with the highest index of fauna diversity of 1.726, the highest value of the index of distribution is in the second cluster of 3.207 and the highest value for the dominance index is in the second cluster of 0.356.The conclusion of this study is that mangrove planting has been successful in increasing the diversity of fauna associated with mangroves on the south coast of East Lombok. Therefore, efforts to maintain the results of mangrove revegetation are a very important part of mangrove conservation.
Role of biological agents Trichoderma sp. at growth three garlic varieties (Allium sativum)
Authors: Yani S , Opik T , Belinda N , Epa P
Published: December 2019

Recently, the national garlic productivity is very low because of pathogens, especially fungi. Efforts can be made to increase the productivity of garlic through the reduction and prevention of pathogenic attacks by using biological control agents. Microorganisms are one of the best biological agents. One type of microorganism is Trichoderma sp. This research was conducted at the Plant and Vegetable Research Institute (BALITSA) Bandung. The experimental design used was a completely randomized design with the type of treatment of garlic varieties. The varieties consist of varieties 1, 2 and 3. The parameters of the observations carried out in this study were the growth rate of garlic which included garlic height, root length and tuber garlic weight. Trichoderma sp. the optimal role is to increase the high rate of garlic plants by 0.8%, increase root length by 9 - 23%, and increase the weight of tuber weight by 21 - 51%.
How will personality combined with motivation affect student learning outcome of ecosystem course?
Authors: Supriyatin S , Sigit D V , Matdalena F
Published: December 2019

Learning outcome someone is determined by two factors, namely internal factors and external factors. Personality and motivation including internal factors that affect student learning outcome. This research aims to determine the correlation between personality and motivation with student learning outcome. Participants in this research are students of XI grade majoring in science from 13 Senior High School Jakarta. This research was held on August until September 2018 with 121 students of XI grade majoring in science chosen by simple random sampling. This research used the descriptive method with survey technique through correlative study. A correlation analysis revealed that personality and motivation were significant relationship with student learning outcome. Personality and motivation simultaneously provides a considerable contribution with student learning outcomes.
The effects of compost and biochar on the growth and yield of red chili plants
Authors: Amaral H D D R , Situmeang Y P , Suarta M
Published: December 2019

This research was conducted to examine the effect of compost and biochar on the growth and yield of red chili plants. This research is a factorial experiment using Randomized Block Design (RBD), which consists of two factors: compost (0, 10, 20, and 30 tons ha−1) and the type of biochar (bamboo and coconut shell). The interaction between compost and biochar did not have a significant effect on all variables observed in this study. The dosage of compost has a significant effect on fruit length, fresh fruit weight, and fresh weight of roots. The biochar treatment does not have a significant effect on the observed variables except for the number of fruits that have a significant effect. The treatment of various dosage levels did not show any significant difference, but the application of 30 tons ha−1 compost produced the highest fresh fruit weight of 185.35 g or increased by 20.94% when compared to the treatment without compost of 153.26 g. The treatment of this type of biochar only had a significant effect on the number of chili fruit, namely coconut shell biochar which gave the highest value of 17.17 chilies and was significantly different from bamboo-based biochar which produced 15.00 chilies.
The effect of salinity on fecundity and production of giant shrimp larvae (Macrobrachium rosenbergii de Man)
Authors: Kawan I M , Arya I W , Sadguna D N
Published: December 2019

This study was conducted to determine the effect of salinity which can produce the most fecundity and number of giant shrimp larvae (Macrobrachium rosenbergii de Man). The experiment was designed using 24 units of randomized block design (RBD) using 20-30 g (B1) and 40-50 g (B2) heavy parent shrimp, with differences in salinity 0 pro-mile (0/00), 3 pro-mile (0/00), 5 pro-mile (0/00), and 7 pro-mile (0/00) which were repeated 3 times. The results showed that differences in salinity of the parent weight group (20-30 g and 40-50 g) had a very significant effect on fecundity and the number of larvae produced. The highest fecundity and production of shrimp larvae were obtained at salinity 5 Promil (0/00) in the parent weight group 40-50 g.
Isolation and screening of amylolytic yeast from Paphiopedilum sp., originating from Bedugul Botanical Garden, Bali, Indonesia
Authors: Risandi A , Fuady R , Sukmawati D , Husna S N A , Nurjayadi M , Enshasy H E , Ridawati R
Published: December 2019

Amylase (E.C.3.2.1.1) are the enzyme that works as catalyst in the hydrolysis of starch into simple monomers. Amylase enzymes are widely used in various industrial fields such as textile, food, paper and other industries. Compared to other organisms, yeasts can produce enzymes more effectively and safer for the environment. Amylolytic yeast can be isolated from flower substrates as it contains sugar for the very limited condition of yeast growth. This study aims to isolate, select and characterize amylolytic yeasts on the substrate of Paphiopedilum sp. from Bedugul Botanical Garden, Bali. Yeast isolation was carried out with direct and washing method, followed by screening conducted on YPSA medium with diffusion agar method. Results showed that 19 yeast isolates were obtained with characteristics of 73.9% white-mucoid, 21.05% cream-mucoid and 5.26% light flesh-mucoid. Screening results showed that 10 isolates which coded by P1, P4, P6, P10, P11, P12, P13, P14, P15 and P19, were able to produce amylase enzyme. The potential yeast isolates in yielding amylase with P12 isolate codes had amylolytic index 0,45 mm. from this research, it can be found the symbiosis between yeasts and plants are happening in certain ways.
Genetic diversity of three sunu groupers species (Plectropomus spp)
Authors: Suryani S A M P , Arya I W
Published: December 2019

The quality of fish seed may be decreased as a result of inbreeding that is a marriage between two individuals who have the same genetic trait. Fish seed quality improved with the genetic approach to parent selection and crossbreed. Quality of fish seeds is taking from natural populations are determined by the genetic diversity of a population. Inbreeding can decrease the quality of seed because it can increase the number of homozygosity and decrease the number of heterozygosity. This study aims to determine differences in genetic variation three species of sunu groupers (Plectropomus maculatus, Plectropomus leopardus, and Plectropomus oligacanthus) and know the kinship of the three species of grouper. While the benefits of this research can provide information on genetic diversity in natural coral trout grouper, expected inbreeding can be avoided. Muscle and liver tissue was used as a sample for electrophoresis analysis with twelve kinds of enzymes namely aspartate aminotransferase (AAT), Alcohol dehydrogenase (ADH), Estrase (EST), -Gliserofosfat dehydrogenase (-GPD), Glukofosfat isomerase (GPI), Isocitrate dehydrogenase (IDH), Lactate dehydrogenase (EST), Malic dehydrogenase (MDH), Malic Enzyme (ME), 6-phosphogluconate dehydrogenase (6- PGD), phosphoglucomutase (PGM), and sarcoplasmic enzymes (SP). Three polymorphic loci in Plectropomus oligacanthus species are 6-PGD, GPI-2, and PGM. In Plectropomus maculatus, and Plectropomus leopardus all monomorphic loci. The three polymorphic loci on Plectropomus oligacanthus meet the Hardy-Weinberg balance with X2 value for 6-PGD value is 0.123, GPI-2 is 0.028 and PGM is 0.028. Plectropomus oligacanthus has a polymorphism level of 0.188, the total number of the focusing allele is 1,154, and the average heterozygosity is 0.023. The genetic distance between the sepsis population based on twelve enzymes showed between Plectropomus maculatus, and Plectropomus leopardus had a spacing of 0.134, between Plectropomus leopardus and Plectropomus oligacanthus of genetic distance 0.196 and between Plectropomus maculatus and Plectropomus oligacanthus the genetic distance was 0.200. The larger the genetic distance between the species, the kinship relationship will be farther away. The distant kinship is owned by Plectropomus oligacanthus.
Longitudinal distribution and population structure Rasbora lateristriata bleeker, 1854 (osteichthyes: cyprinidae) in Sungi River
Authors: Suryani S A M P , Arya I W , Kawan I M
Published: December 2019

Genus Rasbora is a freshwater fish belonging to the Cyprinidae familia distributed covering the Asian region, especially in Southeast Asia. There are 90 species of fish Rasbora scattered around the world where 56 species distributed in Indonesia and three species are endemic to Indonesia. Rasbora fish used as an alternative source of protein because protein is high at 33.4 g / 100 g. Rasbora has higher protein content than the protein content of carp and milkfish, Rasbora also contain high fluorine and contains omega3. This study aimed to describe the longitudinal distribution and population structure Rasbora lateristriata in the Sungi River, Tabanan. Analysis of population structure based on weight and the total length, determine the interaction between physical and chemical factors with an abundance of Rasbora lateristriata. This study is using survey method with purposive random sampling. This study uses three stations by topography and environment, namely the upstream, midstream and downstream. Rasbora species diversity and abundance will be calculated by cluster analysis, longitudinal distribution and population structure will be explained descriptively. The interaction between physical factors with an abundance of Rasbora will be analysed by principal component analysis. In the current study found Rasbora lateristriata with 85 individual species and distributed longitudinally along the river Sungi on the upstream is 14individuals, middle stream is 34 individuals and downstream 47individuals. Lateristriata Rasbora weight ranging from one point three to six grams, the total length ranges from four to seven point five cm. Rasbora lateristriata distribution is affected by the DO, temperature, TSS and BOD. The existence of Rasbora lateristriata influenced by light intensity and depth.
Composition and diversity of fish species in mangrove ecosystem at Muara Binuangeun, Lebak, Banten
Authors: Kholis N , Patria M P , Soedjiarti T , Suryanda A
Published: December 2019

Mangrove ecosystem is an ecosystem in coastal areas that have a high diversity of fish species, and different location has its unique fish composition. Research on mangrove ecosystem at Muara Binuangeun is not yet done and needed to discover the composition and diversity of fish species. Research of composition and diversity of fish species in mangrove ecosystem at Muara Binuangeun, Lebak, Banten, had been conducted in May and November 2015. Catch per Unit of Effort (CPUE) was used as a method with push net and boat net as fishing gear. Fishing was conducted during low tide. Collected samples were preserved with 10 % Formalin Solution and then being identified at the laboratory. In total, 106 fishes were collected from 11 families and 28 species. Istigobius ornatus was the most relative abundant species (19.81 %) and the highest relative frequency too. The diversity index value of mangrove ecosystem was 2.846. The composition of collected fish showed several migrant species from seagrass bed and coral reef ecosystem.
Fish community structure in the mangrove forest of Panjang Island, Banten Bay, Banten, Indonesia
Authors: Pertiwi M P , Kholis N , Patria M P , Suryanda A
Published: December 2019

Research of fish community structure in Panjang Island, Banten Bay, Banten, Indonesia (E 106° 08’ 31.9” & S 5° 56’ 23.4” and E 106° 08’ 20.6” & S 5° 55’ 29.2”) has been conducted from October to December 2014 while spring tide. The aim of the research knew the fish biodiversity and fish community structure. The fishing method was used push net manually active. The location was at Station 1 (West) with sandy-mud and gravelled substrate and Station 2 (North) with the mud-reef substrate. In total, 1770 species were captured (14 families, 16 genera, and 21 species), the largest number were at Station 1 and in November (1.213 and 749 fish). Both stations had a low species diversity index (H’) value (0.705 and 0.807). It supported by a low evenness index or distribution of individuals among species (E) value. Its high dominance index (D) value was due to the predominance of Ambassis gymnocephalus -Chandidae (908), Ambassis buruensis - Chandidae (297), Oryzias javanicus - Adrianichthyidae (265), Chelon sp. - Mugilidae (123), and Gerres sp. - Gerreidae (22) in large numbers. Chandidae is the most common fish in the mangrove ecosystem at Panjang Island as a resident fish.
Endemic species: Morphometric differences between male and female of black-winged myna (Acridotheres melanopterus)
Authors: Vernia R E , Lestari R , Abinawanto A , Winarni N , Sedayu A , Bowolaksono A
Published: December 2019

Black-winged myna (Acridotheres melanopterus) is an endemic species from Indonesia, which has no difference between male and female based on their morphological characteristic. It can be a problem for the breeders to identify the sex when they have to pair the bird. The aim of this research is to identify the differences between male and female black-winged myna based on morphometric characteristic. There are weight, length, width, circumference, and the spread of the wings. The data is processed using principal component analysis (PCA) on the SPSS 20 program. The samples are 71 black-winged myna with minimum two years of age from breeding facilities in Java and Bali islands. Based on the research, morphometric characteristic that distinguishes male and female bird mostly is their wingspan and their weight. Morphometric characteristics of the female myna are smaller than the male. This result is essential for breeders to minimize the risk of pairing the same sex bird.
Ingestion of microplastics by anchovies from Talisayan harbor, East Kalimantan, Indonesia
Authors: Ningrum E W , Patria M P , Sedayu A
Published: December 2019

Microplastics (MPs) is the most contamination problem on the marine environment now, therefore a small pelagic fish like anchovies, can feed accidentally the microplastic. This research focused on the amount of abundance of microplastics in the anchovies. We measured the length and dry weight of the anchovies and isolated their digestive tracts. The digestive tracts were then digested with NaOH and sodium lauryl sulphate (SLS) technical grade. The microplastics had observed with the using microscope and confirmed with Fourier-transform infrared spectroscopy (FTIR). Here, the investigation result from anchovies digestive tract (Stolephorus spp.) sampled (n = 15). The total microplastics contamination from Talisayan harbor, East Kalimantan is 366 ± 3. 51 particles/individual. Kind of microplastics size range detected as categories: < 20 µm, 20 -50 µm, 50 -500 µm, 500 -1000 µm, and >1000 µm. Most of microplastics shapes from Talisayan harbor are microfilm (50%) and microfiber (29.59%). The type of polymers are confirmed by Fourier transform infrared (FTIR) spectroscopy as polypropylene, high-density polyethylene and foamed polystyrene nylon. Our findings reported that specific size range (50-500 µm) is the most majority of microplastics size range which are ingested by anchovies from Talisayan harbor. The microplastics are more dangerous if another contamination found together on it. On this investigation, the mercury contamination also tested and the result showed as not detected mercury contaminant. The anchovies are had the economic value and also small pelagic fish which are play as prey for the other big fish. The exposure are possible to the human by contaminated seafood diet.
The modeling system of horticultural commodity development in Pinggan village, Bangli regency, Bali Province
Authors: Udayana I G B , Kartini L , Situmeang Y P , Sunadra I K
Published: December 2019

Pinggan Village, located in the province of Bali, is located in the highlands, this village is a producer of horticultural commodities in the region of Bali. in discussing horticultural issues, it is also important to know the typical characteristics of Horticulture products, namely: easily damaged in transportation, overflowing / seasonal, rarely in other seasons, and sharp price fluctuations. Modeling system in the development of horticultural commodities in the province of Bali has not been done much. This research is oriented towards achieving goals and ease of operation, for this reason, the analytical method used will be adjusted according to the type and purpose of the research itself. The descriptive analysis method used in this type of research has the objective of obtaining information and factual descriptions and phenomena systematically and accurately, such as regional profile assessments, social engineering, and market potential assessments. The results of this study indicate that some constraints on the production of horticulture crops are that cultivation still needs to be improved in three commodities, including the development of fertilization, maintenance of a healthy garden environment, prevention of pests, water problems and markets.
A traffic congestion analysis in urban networks
Authors: Mukhidin M , Kustiawan I , Lelana A J
Published: December 2019

This paper aims at analysing traffic congestion in a base station site, Bandung city. We did experiments using iManager webLCT U2000. The connection test spans from a site using UTP cable to GPON, then to Telkom device using fiber optic, and finally to RNC. The tests are carried out before and after trouble shooting process. There are huge packet losses founded in the network so the traffic congestions are unavoidable. The key problem and solution are identified in this study. The assessment results after solving problems show that the data traffic experienced a decrease of 28.23% and the payload increased by 61.45%.
An affordable Internet of Things Training Kit for practical work of industrial automation
Authors: Somantri Y , Wahyudin D , Pratama R , Nugraha T , Husni M
Published: December 2019

The need for practical equipment in the vocational high school (VHS) program is necessary. However, due to some difficulties such as the pricey of available training kit in the market caused that most student could not get appropriate practical work equipment. One of the important facilities is a training kit that encouraged the student to learn the Internet of Things. This study describes the design of the Internet of Thing Training Kit based on ESP-32 (IoTTK32). A set of IoT training module has been designed. Through research and development approach, the researcher has constructed a low-cost IoT trainer that can be used in industrial practical work. The results of the examination show that produced IoT kit could be used in formal practical work of industrial automation related to the industrial 4.0 evolution.
Long-term electrical consumption forecasting using Artificial Neural Network (ANN)
Authors: Adhiswara R , Abdullah A G , Mulyadi Y
Published: December 2019

Long-term forecasting of electricity energy consumption has become one of the main fields in the electricity sector in each country. This study aims to compare the accuracy of the results of the method used in this study with research conducted by the government to estimate electricity consumption in Indonesia. Many methods can be used to estimate electrical energy consumption such as statistic methods (Exponential Smoothing, ARIMA, Regression), fuzzy logic and artificial neural network algorithms. The method used in RUPTL is Simple E (Simple Econometric) and method used in this study is the Artificial Neural Network algorithm. The results of this research are data on estimates of electricity consumption in Indonesia for 2019-2025. This research is expected to prove the accuracy of the Artificial Neural Network (ANN) method to estimate electricity consumption in Indonesia.
Design of mechatronic simulators to improve the quality of students learning outcomes in mechatronics subject
Authors: Kustija J , Hasbullah H , Somantri Y
Published: December 2019

Today condition in learning mechatronics subject, especially at Universitas Pendidikan Indonesia Departemen Pendidikan Teknik Elektro still uses learning object and software simulations. This still has not maximized student’s competency in the mechatronics subject, which is required to be skilled in real engineering that will be applied both in the industry and in educational institutions. According to the Universitas Pendidikan Indonesia research master plan which establish its vision to be a Pioneer and Superior University in the field of education, then research on learning innovation is directed to aspects of learning, that is research on learning models, learning media, organizing learning implementation plans, organizing learning materials, and evaluation systems. Learning innovation products generated from this research are expected to be a reference and become the main pillar for all academic units in the UPI environment in implementing learning. Based on the above idea, the researcher proposes to develop a learning media that is corresponding with the requirement of mechatronics subject in the competency based on applicative design mechatronics simulator. The method used in this research is quantitative method with research and development approach. The excellent research of the college with the title “Design Mechatronics Simulators to Improve the Quality of Student Learning On Mechatronics Subject” is a research needed to implement a design that serves as a learning media to improve learning outcomes and student’s competency in mechatronics subjects.
The modelling of photovoltaic power plant connected to the grid related to loading capability
Authors: Hajar I , Azzahra S , Yogianto A
Published: December 2019

Solar Cell performances as a power plant do not only convert energy, so that electricity is generated, but in the study of power systems it becomes a major element that has an important role in the study of power systems. As a power system element, the Solar Cell acts as an element of electricity generation in this study modelled as a PV system and connected to the network, so it must meet the requirements of the electric power network operation. Through MATLAB / SIMULINK modelling and simulations, a 100 kW peak Solar Cell power plant has been modelled to connect to the network. From the simulation and analysis obtained, this Solar Cell model shows that the connected load affects the voltage condition but does not affect the frequency. The load power factor also affects the network, namely with a lower load power factor, it affects the voltage on the network.
Implementation of mobile sensor communication system on multicell networks
Authors: Effendi M R , Firdaus I , Rifai A F , Hamidi E A Z , Ismail N , Munir A
Published: December 2019

A monitoring technology for large area with low-cost and high efficiency is highly demanded. Wireless Sensor Network (WSN) is the solution for a monitoring technology. However, not all monitoring must be continuous, there are some monitoring that can be carried out periodically. Therefore, it is possible to invent a mobile sensor communication system on multicell networks. This research aims to implement a WSN system by collecting data from mobile sensors on multicell networks. The focus of research is on the design of mobile sensor communication with low-cost device as transceivers, namely NodeMCU. The design is implemented using 4 NodeMCU units, 3 of them are functioned as access points, while 1 unit is employed as a client connected to the sensor. The experimentation was conducted by varying transmission distances of sensors with and without barriers. Moreover, handover and blankspot areas are also included accordingly. The result of experimentation shows that the usage of low-cost devices has still a possibility to build monitoring mechanism on multicell networks even though the transmission power was significantly influenced by the availability of barriers.