bluuebunny/crossref_metadata_2025_split huggingface dataset:
Size distribution, length-weight relationship and condition factor of three species male fiddler crab from jaboy mangrove wetland, Sabang, Indonesia
Authors: Zulfahmi I , Marlinda R , Nisa C , Paujiah E , Irfannur I , Rinaldi R , Purnama N R , Mandasari M 
Published: March 2021

Abstract
The size distribution, length-weight relationship and factor condition of three species male fiddler crab (Tubuca dussumieri, Gelasimus vocans and Austruca perplexa) from jaboy mangrove wetland, Sabang, Indonesia were examined. 50 samples from each species was collected from three station using digging method and cast net. Samplings were carried out during May 2019. The carapace length (CL) and total weight (TW) was measured using a digital caliper (standard error: 0.01 mm) and digital scale (standard error: 0.01 g). Result showed that Tubuca dussumieri, Gelasimus vocans and Austruca perplexa were found in the size range of 12.37-17.19 mm, 12.03-16.46 mm, 7.79-10.39 and mm carapace length, respectively. Besides, the total weight varied from 2.09-8.20 g, 2.85-5.07 g and 1.15-2.26 g, respectively. All species of male fiddler crab showed negative allometric growth (b < 3). The highest value of b was founded in Tubuca dussumieri, while the lowest was founded in Gelasimus vocans were 2.659 and 1.299, respectively. Nevertheless, Austruca perplexa has a higher value of factor condition than Tubuca dussumieri and Gelasimus vocans.
Diversity of marine aquaculture as a strategy to protect the livelihood of small-scale and seagrass conservation on the south coastal region of Lombok Island, Indonesia
Authors: Syukur A , Idrus A A , Nasir L M I H M , Fahmi F 
Published: March 2021

Abstract
Small fishermen are those who have contributed to food security and social stability. The purpose of this research is to describe the development of marine culture as a complementary livelihood of small fishermen and the protection of the marine environment. The research method uses observation techniques, surveys, interviews, questionnaires and in-depth discussions. Data analysis uses descriptive statistical analysis and regression. The results of the study showed that marine culture that could be developed was baronang and cuttlefish. Both types of these seeds are available in the surrounding seagrass area. The results of the regression analysis showed that the length of cultivation had the highest R2 compared to the other two independent variables, namely education and the number of family members. Meanwhile, farmers have internal regulations to protect the environment, especially in seagrass areas. The conclusion of this research is that aquaculture can be a solution for fishermen’s livelihoods and has a strategic value from the ecological aspects for the sustainability of marine life. Therefore, marine aquaculture can be a model in a food security strategy at the local level and can contribute to regional food security.
Application of Paclobutrazol and Electrical Conductivity value of nutrient solutions to improve yield and quality Cucumis sativus L var Japanese on the hydroponic system
Authors: Sudrajat A , Frasetya B , Daniswara F G 
Published: March 2021

Abstract
Many factors influence the yield and quality of hydroponically cultivated Japanese cucumber plants. This study aims to study the interaction of Paclobutrazol and the Electrical Conductivity (EC) of nutrient solution to improve the yield and quality of cucumbers. The study was conducted in February 2019-April 2019 at the greenhouse of Universitas Padjadjaran, Jatinangor. The research method used was a split-plot design consisting of two factors and three replications. The first factor is the value of EC n1 = (2.0-3.2 mS cm−1), n2 = (2.0-3.4 mS cm−1) and n3 = (2.0-3.6 mS cm−1) ) and the second factor is Paclobutrazol concentration p1 = 0 ml l−1, p2 = 0.375 ml l−1 and 0.75 ml l−1. The parameters of growth and yield of plants observed were leaf area, day of flowering, number of male flowers, number of female flowers, number of fruits, fruit weight, and percentage of normal fruit shape. The observational data were then analyzed by the variance analysis of 5% significance level and continued with Duncan’s test at 5% level. The results showed there was no interaction of Paclobutrazol factors and EC of nutrient solution values. Plant growth without the application of Paclobutrazol and EC generative stage 3.2 mS cm−1 yields better crop quality and yield.
Liquid organic fertilizer and types of organic mulch toward photosynthesis translocation of green beans (Phaseolus vulgaris L.)
Authors: Roosda A A , Ramdhani T , Birnadi S 
Published: March 2021

Abstract
Green bean productivity is closely related to the accumulation of photosynthesis translocation. Organic base matter for fertilizer and mulch provide eco-friendly system to support plant productivity. Liquid organic fertilizer and types of organic mulch serve the optimum condition for growing environment of green beans. This study aimed to determine the concentrations of liquid organic fertilizer and types of organic mulch toward biomass addition in green beans. The experiment was conducted on Andisol soil in Cisalak, Subang West Java from January to March 2018. A factorial randomized block design was used to arrange the first factors (0 ml l−1, 1 ml l−1, 2 ml l−1, and 3 ml l−1 liquid organic fertilizer) and the second factors (without mulch, paddy straw mulch, and reeds mulch). The results obtain no interaction between liquid organic fertilizer and types of organic mulch for number pods per plant, pods weight per plant, dry stover weight, shoot root ratio and harvest index. Liquid organic fertilization in 2 ml and paddy straw mulch, independently, gave the best recommendation to increase green bean productivity.
Growth of mycelium oyster mushroom (Pleurotus ostreatus) in medium rice wastewater with coconut water
Authors: Rachmawati Y S , Akbar Z A , Chaidir L , Roosda A A 
Published: March 2021

Abstract
The high consumption of oyster mushroom (Pleurotus ostreatus) is constrained by the production capacity and the provision of mushroom seed with low quality. Also, the price of starter pure brood stock is expensive, a calculated Rp400.000-Rp1.000.000 per-bottle. This research aims to determine the effect of rice wastewater with coconut water on the growth of the mycelium pure brood oyster mushroom. The research was conducted in July 2019-Februari 2020 in the integrated laboratory of the Faculty of Science and Technology UIN Sunan Gunung Djati Bandung. The method used is experimental with 9 treatment of combination of rice wastewater with coconut water concentration i.e. 100%:0%, 80%:50%, 80%:20%, 50%:80%, 50%:50%, 50%:20%, 20%:80%, 20%;50%, 0%:100%, and repeated three times. The combinations concentration of 50% rice wastewater with 50% coconut water produced the best growth of colony diameter anda mycelia growth rate compared to other treatments. Therefore, the combinartion medium 50% rice wastewater with 50% coconut water can be used as a medium to multiply pure broodstocks of oyster mushrooms.
Mapping total Nitrogen in dryland North Lombok from soil spectral reflectance
Authors: Kusumo B H , Purwanto Y A , Idris M H , Bustan B , Baharudin B 
Published: March 2021

Abstract
Nitrogen (N) is one of the essential nutrients for plant growth, and its availability and spatial distribution in dryland need to be known for better soil and crop management. However, mapping soil N content is expensive and time consuming. The aim of this research is to test the use of soil spectral reflectance to rapidly measure and map soil total N in North Lombok dryland. About 300 soil samples, including the coordinates, were collected in Kayangan Sub-district of North Lombok, Indonesia. The samples were dried, ground, sieved (0.2 mm diameter), which then analysed for total N content using Kjeldhal method, and scanned using near infrared spectroscopy (NIRS). A calibration model was developed using partial least square regression (PLSR) from Kjeldhal-analysed N data and soil spectral data. The model was then used to predict the soil N content from the spectral data, and then soil nitrogen content was spatially mapped. The result showed that soil spectral reflectance technology was able to measure and map total N distribution in soil although the range of soil N content was from very low to medium. This shows that the technology can be used to map soil N distribution in dryland North Lombok, which may then be used for the guidance of fertiliser application.
The effect of nuclear radiation on mutation chromosomes of shallot cells (Allium cepa)
Authors: Sulianti A , Riyadhi H F , Kinasih I , Sukmabuana P 
Published: March 2021

Abstract
Environmental pollution by nuclear radiation has been known to endanger chromosomes. This research aims to analyze the abnormal forms of root shallot chromosomes which are irradiated by nuclear with various levels of radiation. This is a quasi-experimental research. The treatment group was given radiation through nuclear reactors at a dose of 11.88 rad, 8.69 rad, 2.01 rad, 1.28 rad, 1.15 rad, 0.26 rad, 0.00034 rad, 0.00016 rad, while the control group was without radiation. The staining of the preparations was carried out using Acetocarmine 2%. Reading preparations using a microscope with a magnification of 400x. The results of the study showed the emergence of various forms of chromosomal abnormalities. Abnormal forms that appear are pole to pole arrangement chromosome, unequal separation, binucleate cell, pulverized ball metaphase, sticky anaphase with broken bridge, chromosome rosette, abnormal chromosome fragment, early cell plate formation at late anaphase, sticky metaphase, binucleate cell with a bridge, chromosome fragments, binucleate cells, chromosome gaps, ball anaphases with a diagonal scattered anaphase bridge, and aberrant grouping at anaphases in a giant cell. The novelty of this preliminary study is that chromosomal abnormalities in the onion roots were found even in the very low radiation group. Large-scale research is required and their effects if eaten by animals or humans need further research.
Analysis of ecology index of demospongia class (spons) in litoral zone of Cikabodasan beach of Sancang sea nature reserve Garut district
Authors: Hernawati D , Al-jawami I , Permana K R , Mulyaningsih S , Nurkamilah S 
Published: March 2021

Abstract
This research aims to determine the Ecological Index of Demospongia Classes (Sponges) in the Litoral Zone of Cikabodasan Beach, Sancang Sea Nature Reserve. The method used in this Research is descriptive method with quantitative approach and sampling using purposive sampling techniques assisted with line transects and quadrate transects in identifying species from the Demospongia Class. The sampling process was carried out by dividing the study site into three observation stations with a distance between stations 92 m. Each station consists of three line transects with a length of 100 m with a distance between the line transects 42 m. Each transect line is placed 10 transect squares with a size of 1x1m. Based on the results of the research, Demospongia class species were sampled as many 12 species with total of 272 individuals. The highest tecological index values were found in apply sinaaerophoba species with diversity index value of 0.3465, abundance index of 0.7556, evenness index of 0.1395, and dominance index of 0.0625. The lowest tecological index values are found in Haliclonacinerea and Plakortis sp with diversity index value of 0.00497, abundance index of 0.0333, evenness index of 0.0200, and dominance index of 0.0001 in each species.
UI Zero Plastic as an action towards sustainable campus
Authors: Wardani W K , Kholis N , Pradipta E , Lestari F , Patria M P , Priambodo R , Bowolaksono A 
Published: March 2021

Abstract
Plastic waste has become a globalized environmental issue. Indonesia became the second-largest producer of plastic waste after China based on a report from the World Economy Forum. Waste management and individual awareness of environmental issues are challenges for Indonesia. The more individuals who move, the more waste generation will result from these activities. University of Indonesia (UI) as an educational institution has more than 50,000 academic people/year and has diverse activities. UI produced 663,984 kg of plastic waste in 2018. UI was responsible for the production of plastic waste generated as a form of effort towards sustainable universities. Efforts to increase awareness of environmental issues by conducting socialization related to the UI Zero Plastic Program in the campus environment to leaders at UI, students, employees, canteen tenants, and during major events at UI such as UI graduation and the beginning of new student activities. Based on the socialization of the UI Zero Plastic Program that has been implemented, there has been a decrease in the generation of plastic waste from 2018 to 2019. UI Rector’s Decree regarding the UI Zero Plastic Program as a reference in the socialization and implementation of the UI Zero Plastic in the campus environment.
Analysis location of microplastics in green mussel’s Perna viridis Gills (Linnaeus, 1758)
Authors: Madeppungeng E R , Patria M P , Suryanda A 
Published: March 2021

Abstract
This study describes the location, type, and range of microplastic sizes found in the gills of green mussel Perna viridis. This study continues the results of Fathoniah’s research on 2017 about microplastic abundance in green mussels at Kamal Muara, North Jakarta. Sample of 3 green mussels with a size of about 7 cm was taken from Kamal Muara. Gills from both the outer and inner demi branch were isolated and made as preparations. Every part of the gills marked into posterior, anterior, proximal, and distal. After that, the gills were observed under the light optical microscope. Position and type of microplastic in the gills was recorded and measured using the LAZ EZ application. The results showed that the distal area of the gill contains more microplastic than proximal. The dominant microplastic group found in the gills of green mussels was fiber. The range of microplastic sizes found in green mussel’s gills was 20-4500 μm.
Van soest and mineral analysis of wild buffaloes feces (Bubalus bubalis L.) in Savana Baluran National Park, East Java Indonesia
Authors: Lisanti E , Wulaningsih R D , Arwin A 
Published: March 2021

Abstract
Climate change has affected livestock production systems through impair feed intake, metabolic activities and defense mechanisms. Furthermore, it is also caused the greatest reduction of herbage yield and increase lignifications in plant tissues and hence decrease the digestibility of forage by the animal. The research has been done in Savana Bekol, Baluran National Park, East Java. The research was conducted in June 2019. Objectives: To know Van Soest analysis of wild buffaloes feces sample, so we know the type of plant that consumed. Methods: Observations were carried out by withdrawal feces sample with purposive sampling. Observation time is carried out for 8 hours (8.00-16.00). Van Soest analysis was conducted at Laboratory of Nutrition Technology of Animal Husbandry Faculty, Bogor Agricultural University. Results: The result for Van Soest analysis were Neutral Detergent Fiber (NDF) (71.60%), hemicellulose (23.19%), Acid Detergent Fiber (ADF) (48.41%), cellulose (2.22%) and lignin (32.91%). Mineral analysis showed that feces of buffaloes consists of Nitrogen Free Extract (NFE) (32.05%), Calsium (Ca) (2.00%), Phosfor (P) (0.52%), and Natrium Chloride (NaCl) (0.10%). Conclusion: These results indicate the NDF, hemicelluloses, cellulose of wild buffaloes were lower than pet buffaloes, but ADF and lignin of wild buffaloes were higher than pet buffaloes.
Model of ecolabel in environmental conservation
Authors: Marini A , Safitri D , Yunaz H , Putra ZE F F , Nuraini S , Rihatno T , Ibrahim N 
Published: March 2021

Abstract
The aim of this study is to propose ecolabel model in Jakarta. This survey study distributed the questionnaires to 757 consumers in Jakarta in Indonesia using Structural Equation Modeling (SEM). The research found that model suggested was good fit for the data. The result of study shows that environmentally informative instrument, environmentally friendly label, and environmental protection were positively associated with ecotourism. providing accessible message to consumer about the environmental attributes of the product, giving the consumer knowledge about the production standards of the product, and transmitting green product messages have positive correlation with environmentally informative instrument. Indicating the products coming from environmentally friendly substances, communicating a sense of environmental consideration on the part of the manufacturer to consumer, and arousing consumer interest to purchase environmentally friendly products are positively related to environmentally friendly label. Assisting to diminish the volume and toxicity of pollutants, encouraging consumer awareness development about product impact on the environment, and driving ecologically conscious consumer behavior are predictors of environmental protection. The conclusion of this study is that ecolabel model suggested can be used in Jakarta in order to have environmental conservation.
Environmental quality model to have sustainable environment
Authors: Nuraini S , Safitri D , Marini A , Rihatno T , Budiaman B , Ibrahim N 
Published: March 2021

Abstract
The aim of this study is to propose environmental quality model in order to have sustainable environment. This survey study distributed the questionnaires to 375 persons of local community in Jakarta in Indonesia using Structural Equation Modeling (SEM). The research found that model suggested was good fit for the data. The study result presents that socio-economic domain have significant positive association with of environmental quality. However, the positive associations between ecological domain and meteorological domain was not confirmed in this study. The use intensity of water resources and food production have significant positive association with ecological domain. However, the relationship between waste management and ecological domain was not supported in this study. Air pollutant, water pollution, and earth temperature have significant positive connection with meteorological domain. Water shortages, human health problems, and community environmental awareness have significantly positive relationship with socio-economic domain. It can be concluded that environmental quality model hypothesized can be used for local community in Jakarta in Indonesia in order to have sustainable environment.
Effect of saline condition and application of rice husk silica extract on lettuce growth in hydroponics
Authors: Subandi M , Frasetya B , Resminiasari N 
Published: March 2021

Abstract
The development of hydroponic vegetable production in coastal areas is faced with the constraints of irrigation water quality that has high NaCl. The purpose of this research is to study the interaction of NaCl concentration in the planting media and the concentration of silica extract of rice husk on the growth of lettuce plants. The study was conducted in April 2019-June 2019 at the greenhouse Palasari-Cibiru Bandung city with altitude + 800 m above sea level. This study used a factorial complete randomized design consisting of 2 factors with three replications. The first factor is the concentration of NaCl (n1 = 0 ppm, n2 = 1,460 ppm, n3 = 2920 ppm, n4 = 4380 ppm, and n5 5850 ppm) and the second factor is the concentration of silica extract of rice husk (s1 = 0 ml l−1, 30 ml l−1, and 45 ml l−1). Growth parameters observed were plant height, number of leaves, leaf area, root length, and plant fresh weight. The results showed that there was an independent effect on the concentration of NaCl on fresh plant weight. In the condition of saline media with a concentration of NaCl 1,460 ppm-2,920 ppm and the concentration of silica extract of rice husk, 30 ml l-1 lettuce plants can grow in good condition.
Information hiding in images using Discrete Cosine Transform
Authors: Emmanuel G , Hungil G G , Maiga J , Santoso A J 
Published: March 2021

Abstract
In this era of development and increasing use of the Internet, user facing security problem during information sharing in which unauthorized receivers can gain access to the information transmitted. Data hiding during the transmission of information via the internet is one of the techniques used to keep the secrecy of the information to the unauthorized/ unintended persons. Steganography is a way of hiding secrets information by inserting it into an audio, video, image or text file without raising any suspicious to unintended persons. This paper presents the study which hides text messages into the image file by using Discrete Cosine Transform (DCT) steganography method. The method of this work by transforming the cover image and text message from spatial domain to frequency domain and use redundant bit of cover image to hide text message in such a way that unintended person will continue to see it as a normal image. The method continues to keep the quality of the cover image which transfers the information to reduce suspicion. Steganography is most used in military, law enforcement agency, corporate spies and in the medical area for hiding sensitive information.
The development of a digital video to improve Nutrition and Reproductive Health (NRH) knowledge of female adolescents
Authors: Rusilanti R , Riska N , Mahir I , Artanti G D , Febriana R 
Published: March 2021

Abstract
The awareness of female adolescents about nutrition and reproductive health (NRH) to prevent nutrition problems in Indonesia is very important. This study aims to develop a digital video used in the school environment and the community to improve the NRH knowledge of female adolescents. The methodology of research is R&D (Research and Development) with the ADDIE model (Analyse, Design, Develop, Implement, Evaluate). The design and development phase produced a 30 minutes digital video format that contains NRH materials. The results of these phases showed that media experts considered the appropriate value of 4.5 and a nutritionist value of 4.4. The field testing implemented the video product in 3 Vocational High Schools in DKI Jakarta and West Java Province by involving 180 female students to measure the effectiveness of the use of digital video media. The field test results in a useful digital video for improving NRH knowledge of female adolescents.
Design of subsidized fertilizer prediction information system with safety stock methodology
Authors: Setiawan R , Rahayu S , Nugraha G G S , Baswardono W , Satria E 
Published: March 2021

Abstract
The purpose of this research is to design a subsidized fertilizer information system equipped with a prediction system with a safety stock method. This study uses the waterfall methodology with stages of Analysis, Design, Coding, and Testing, as well as the safety stock method for prediction. By testing using black-box testing with system modeling using the Unified Modelling Language (UML) and Business Process Model and Notation (BPMN). The results of this research are a prototype of a fertilizer information system for data collection activities, fertilizer expenditure from the warehouse, and fertilizer orders based on predictions. This research takes a case study at PT. Anugerah Ihsan Makmur, which is a company engaged in the distribution of subsidized fertilizers in the Garut region. This information system can help record the distribution of fertilizer, determine the amount of fertilizer procurement that must be ordered to suppliers to meet inventory needs so that there are no shortages, and can use as a management report on the distribution of subsidized fertilizers to the government.