bluuebunny/crossref_metadata_2025_split huggingface dataset:
Antibacterial Properties of Ethanolic Extract, N -Hexane, and Ethyl Acetate Fraction of Rantiti Leaves (Cipadessa baccifera Roth. Ex Roth) Miq.) Against Staphylococcus aureus and Salmonella thypi
Authors: Cintya H , Parapat S A 
Published: December 2024

Abstract
Rantiti (Cipadessa baccifera) are plants from Meliaceae family that are widely used in traditional medicine. Rantiti leaves have phytochemical constituen such as tannis, phenols, alkaloids, flavonoids, terpenoids, saponins that provide a defense mechanism against various microorganism in the treatment of diarrhea. The aimed of this study was to investigate the antibacterial properties rantiti leaves. Antibacterial properties test with the disc diffusion method against the bacteria Staphylococcus aureus and Salmonella thypi. The results of this study that the antibacterial properties of extracts of rantiti leaves showed the greatest zone of inhibition value in ethyl acetate fraction at concentration of 400 mg/ml that is 12.66 ± 0.25 mm against Staphylococcus aureus and 10.73 ± 0.7 mm against Salmonella thypi in the strong category. While the positive control, cotrimoxazole, has zone of inhibition value of 21.00 ± 0.42 mm against Staphylococcus aureus and 26.85 ± 0.91 mm against Salmonella thypi in the very strong category. The conclusion of this study that the extract from rantiti leaves have strong antibacterial properties against bacteria Staphylococcus aureus and Salmonella thypi.
The influential factor of the rice import problem in Indonesia
Authors: Lindawati  , Purba F S , Ayu S F , Darus M B 
Published: December 2024

Abstract
Indonesia’s rice imports demonstrate variability, peaking in 2023 at 3 million tons. This import volume is the second-highest documented from 1993 to 2023. This study seeks to evaluate the influence of harvest area, rice production, rice consumption, Indonesian GDP, exchange rate, and local rice price on the volume of rice imports. This study employs annual time series data from 1993 to 2023. This study employs the Autoregressive Distributed Lag (ARDL) methodology. The study indicates that the ARDL model is defined by the variables of harvest area (LP), rice production (PB), rice consumption (KB), Indonesian GDP (GDP), exchange rate (NT), and local rice pricing (HB). All parameters, including variable t, the lag optimum of harvest area, rice production, rice consumption, Indonesian GDP, exchange rate, and local rice price, exert a considerable impact on the rice import variable (I) at a rate of 92%. Partially, I (-3), LP, LP (-1), PB (-1), and PDB (-1) significantly impact rice imports (I). Over the long run, LP, PB, KB, GDP, NT, and HB have no significant impact on the volume of rice imports. In the short term, I (-1), I (-2), LP, PDB (-1), HB, and HB (-1) significantly impact rice imports.
Analysis of factors influencing cow’s milk production in Suitable Environment of Kampung Susu Lawu, Magetan Regency, East Java
Authors: Purnomo S H , Sari A I , Rahayu E T , Emawati S , Dewanti R 
Published: December 2024

Abstract
This study will examine the variables that impact milk output from dairy cows in Kampung Susu Lawu. This study was conducted on a community dairy farm in the suitable environment of Plaosan subdistrict, Magetan regency, East Java Province. Data was collected using the purposive sampling approach. Multiple regression was analyzed to identify the parameters influencing milk output in dairy cows. The study findings indicate that the multiple linear regression model is Y = 3.160 + 0.001 X1-0.767 X2 + 0.120 X3-1.164. The regression analysis shows that the R2 coefficient value is 0.62, meaning that the independent variables forage, concentrate feed, land area, number of workers and number of family livestock influence milk production by 62% while 48% by outer variables. The findings of the F test show that the variables forage, concentrate feed, land area, labor, and number of animals simultaneously influence the milk production of farmers. The t test shows that forage, concentrate feed, land area and labor do not significantly influence the factors that influence milk production in dairy cows. The conclusion of this research is that factors that can influence milk production are the number of dairy cows.
Performance effectiveness of the Puncak Merapi Horticultural Farmer association as a red chili auction market in the Sleman Production Center Indonesia
Authors: Susanawati  , Azizah U , Man N 
Published: December 2024

Abstract
This research aims to gain a better understanding of the Puncak Merapi Horticultural Farmer Association (PPHPM) in Sleman Regency, its member profiles, its auction process, its effectiveness, and the relationship between its effectiveness and its member profiles. A total of 150 farmers made up the sample, gathered using proportional random sampling from each assembly point. Descriptive analysis and research scale were employed as the data analysis model. The analysis unveiled that PPHPM’s members, the farmers, and its profile as an auction market supported red chili auctions. The auctions began with farmers delivering red chilies to the assembly points, followed by weighing, sorting, grading, calculating the net weight, and entering data into the diPanen.id application, traders entering prices into the application, packaging, announcing the winner, payment, and the distribution of auction results. Relationships in the auction market, auction market output, and auction market flexibility were the top indicators of PPHPM’s effectiveness as a red chili auction market in Sleman Regency, placing it in the high category. A solid relationship existed between the member profiles and the effectiveness of PPHPM.
Evaluating climatic factors affecting cassava production in North Sumatera, Indonesia
Authors: Pane T C , Syaifullah A N , Salsabillah  
Published: December 2024

Abstract
Cassava is one of the crucial food crops in Indonesia. However, cassava production in several production centers in Indonesia tended to decrease annually. As one of the cassava production centers in Indonesia, data from 2010-2022 shows that North Sumatera once had experienced significant production growth, but the production started to decline again. Climate and weather changes are suspected to be one of the reasons for the difficulty in maintaining this production growth. This study aimed to analyze the impact of climate change, represented by temperature, air humidity, and rainfall, on cassava production in North Sumatera using the Ordinary Least Square estimation method to estimate a Multiple Linear Regression model. Climate change, represented by temperature and air humidity variables, had a positive but insignificant effect. In contrast, the rainfall variable negatively and significantly impacted cassava production. It indicated that the declining trend of cassava production in North Sumatera corresponded with the increasing average rainfall during the cultivation period. Average rainfall noticeably impacted the decline in output, while average temperature and air humidity had a minimal impact. The importance of increasing cassava production to ensure food security must acknowledge sustainability concepts to avoid long-term environmental and climate changes.
Food aid and sustainable development
Authors: Purba A R , Chalil D , Krisnamurthi B , Barus R 
Published: December 2024

Abstract
For households experiencing poverty, food needs represent the largest percentage of their expenditures. One of the government’s efforts to address these needs is the implementation of a food aid program. However, the amount of Bulog rice aid and the number of people experiencing poverty in North Sumatra Province do not follow a consistent trend. This study was conducted to determine the impact of food aid programs on poverty (SDG 1), food sufficiency (SDG 2), and health and well-being (SDG 3). Poverty is analyzed by examining the composition of food and non-food consumption; zero hunger is assessed through the frequency of rice consumption and purchasing; and health and well-being are evaluated through protein consumption. Data were obtained from a sample of 100 Beneficiary Families (KPM) in Medan Belawan District, which has the highest number of families experiencing poverty and KPM. The data were analyzed descriptively using the Wilcoxon Signed-Rank Test. The results show a significant change in household composition of food and non-food consumption, as well as the frequency of rice consumption and purchasing. Therefore, food aid could improve poverty and food sufficiency for the KPM. However, protein consumption among households has not changed significantly, thus their health and well-being have not yet improved.
Strategies for sustainability local sawang durian in North Aceh District
Authors: Suryadi  , Tanjung A F , Fadli  , Kembaren E T , Az-zahra A , Mustika J 
Published: December 2024

Abstract
With this existing potential, there are still fundamental problems that are still faced in the process. Most of the farming patterns are still multicultural systems using traditional technology. This research aims to: formulate strategies that can be implemented in the development of local Sawang Durian in North Aceh Regency. The research method used is SWOT analysis to obtain a strategy for the development of local Sawang Durian. The results of determining internal factor indicators (strengths-weaknesses), for strength factors, namely farmers’ experience, potential regional conditions or topography, land area owned, unique quality of durian fruit, easy plant maintenance process. Meanwhile, the weaknesses are the adoption of technology which is still simple, there is no guarantee of availability per season, lack of capital or is limited, the production capacity is still lacking or the quality and quantity is not yet continuous, there is no activity of farmer groups, while determining external factor indicators (opportunities-threats) for opportunity factors, namely import restriction policy, high market demand for durian, selling prices, availability of production facilities. Meanwhile, the threat factors are the presence of competitors from other regions, the threat of pests and diseases, unstable weather changes.
The manufacturing of a briquette press machine with a pneumatic system
Authors: Rizaldi T , Rini S 
Published: December 2024

Abstract
The use of green energy not only has the potential to preserve fossil fuel reserves but can also have a positive impact on the environment. Briquettes are one of the alternative fuels to reduce the use of fossil fuels. Manual and hydraulic printing of briquettes often experience problems, namely fluctuations in size and pressure in manual printing and leaks in the hydraulic system. Therefore, this research aims to make and test a briquette press machine with a pneumatic system to increase productivity and briquette quality. The results of this study indicate that the effective capacity of the machine is 3,179 kg/hour. The percentage of material left behind is 1.56%. The briquette density value reached 0,58 gr/cm3. The briquette moisture content value is 4.3% and the briquette compressive strength value is 7,22 kg/cm2. The production cost of briquettes is Rp.13,500/kg. BEP is 100 kg/year. R/C ratio is 1,265. NPV of Rp.345,915,642.25. The amount of IRR value obtained in this briquette processing is 45,66% and the PP of this business is 3,6 months. Based on the results of this study, it can be stated that this machine is feasible to use, and the briquette results have met the Indonesian briquette quality.
The study of tertiary irrigation channel in Pulau Gambar irrigation cannals for increase rice productivity
Authors: Nasution D L S , Suhilda  
Published: December 2024

Abstract
Tertiary Irrigation Channel used to experienced significant water loss. The lack of water would caused rice productivity decreased. This study is intended to evaluate the efficiency of tertiary irrigation channels in Pulau Gambar Irrigation Cannals and create a simulation and adjustment of combination channel design to optimize the efficiency. The result of the study shown the efficiency of first channel is 65.37%, the second channel efficiency is 60.25%, and the third channel is 64.87%. The flow velocity average is less than critical flow velocity would caused sedimentation in channel base that it needs to adjust the channel design to optimize the channel efficiency. The most optimize channel design for first channel by channel width (B) 0.35 m and channel depth (D) 0.18 m, the second channel got optimize design by channel width (B) 0.31 m and channel depth (D) 0.15 m, and the third channel got optimize design by channel width (B) 0.37 m and channel depth (D) 0.20
Impact of glycerol addition on cow manure biogas
Authors: Raju  , Saruksuk H W P P 
Published: December 2024

Abstract
Energy use increasing is caused by increasing population and lack of reserves to produce oil, and also problem of emissions from fossil fuels will put pressure on every country to be able to produce renewable energy. Biogas is a renewable energy that can be solution to alternative energy needs. This research aims to determine the effect of glycerol utilization in making biogas from cow dung. This research method used experimental method. The results showed that 0% glycerol temperature was 28.56°C, 5% glycerol temperature was 29.7°C, 10% glycerol temperature was 30.16°C and 15% glycerol temperature was 30.5°C, with upper pH of 0% glycerol was the lowest pH of 5.389 and 15% glycerol was the highest pH of 6.61, while lower pH of 0% glycerol was the lowest pH of 5.49 and also the highest pH was found in 15% glycerol which was 6.58. At 0% glycerol biogas volume yields 18.53 ml, 5% glycerol yields 25.18 ml, 10% glycerol yields 31.89 ml, and at 15% glycerol yields 55.51 ml. In the 0% glycerol flame test, it produces 46 seconds, 5% glycerol produces 1 minute 15 seconds, 10% glycerol produces 2 minutes 48 seconds and 15% glycerol produces 3 minutes 8 seconds.
Land equivalent ratio and competitive index of intercropping vetiver with soybean and organic mulch application
Authors: Lubis K S , Amalina A N 
Published: December 2024

Abstract
Intercropping is an agricultural method that involves planting more than one type of crop in the same area. The goal of this practice is to maximize the use of nutrients, water, and sunlight to achieve optimal results. This study aims to evaluate the chemical properties of soil as well as the growth of soybeans (Glycine max L. Merill) by using vetiver (Vetiveria zizanioides) as an intercropping system and organic mulch application. The research design used random blocks with five treatments, namely K0 (soybean monoculture); K1 (intercropping of soybeans and vetiver); K2 (intercropping of soybeans and vetiver with organic mulch); K3 (soybeans with organic mulch); and K4 (vetiver monoculture), repeated five times each. The results showed that intercropping soybeans with vetiver added organic mulch did not increase soybean or vetiver growth. The land equivalency value for K1 treatment (intercropping of soybeans and vetiver) was recorded at 1.80, while the K2 treatment (intercropping with the addition of organic mulch) was 1.26. The competition index for K1 is 1.06 and for K2 is 0.80. These results show that intercropping soybeans with vetiver plus organic mulch is more advantageous compared to soybean monocultures.
The use of remote sensing methods to determine the water quality changes caused by the oil spill in Faekhuna’a, North Nias
Authors: Manurung V R , Husaini H , Dalimunthe H I , Florencia S , Abdillah M F , Harahap M P , Hanif A , Manurung F , Minfi U 
Published: December 2024

Abstract
On February 11, 2023, An incident of asphalt oil spilling in the waters of North Nias, the distance of 50 km from the oil spill from faekhuna’a to the conservation area in lahewa. the efforts of observations could not be conducted due to a lack of time and cost. remote sensing methods offer advantages to estimate and determine the Primary Productivity and changes in the Chlorophyll-A, Photosynthetically Active Radiation and Sea Surface Temperature. Using Vertically Generalised Production Model data from AquaModis 2019 to 2023, The results after oil spills in 4 locations. the Sea Surface Temperature had decreasing in february: SL, PL1, PL2, PL3: 31.08 °C, 31.17 °C, 31.27 °C, 31.17 °C; in march: SL, PL1, PL2, PL3: 31.11 °C, 31.21 °C, 31.21 °C, 31.02 °C in spilt oil. Chlorophyll-a had increasing in February SL, PL1, PL2, PL3: 0.218 mg/m−3, 0.201 mg/m−3, 0.283 mg/m−3, 0.282 mg/m−3; in march SL, PL1, PL2, PL3: 0.332 mg/m−3, 0.312 mg/m−3, 0.272 mg/m−3, 0.261 mg/m−3. Primary Productivity had increasing in February SL, PL1, PL2, PL3: 429.75, 439.75, 509.75, 479.75; in march SL, PL1, PL2, PL3: 587.89, 534.12, 517.29, and 527.39. oil spills affect in chollorophyl-a, sea surface temperature, and primary productivity, particularly in coastal areas.
Growth and quality of the seaweeds (Kappaphycus alvarezii and Eucheuma denticulatum) in different inter croppings and planting distances using the longline method
Authors: Aslan L O M , Yuniar S , Balubi M , Ruslaini  , Sabilu K , Aslin L O , Muskita W H , Boer D 
Published: December 2024

Abstract
Seaweed cultivation is currently being extensively practiced to boost productivity. This research aimed to determine the optimal Daily Growth Rate (DGR) and planting distance for enhancing the growth and quality of K. alvarezii (KA) and E. denticulatum (ED), specifically the dry weight (DW) to wet weight (WW) ratio and Clean Anhydrous Weed (CAW) content. The 45-day experiment used a 2-factorial Randomized Block Design (RBD) with planting distance (J) and intercropping planting pattern (R) as the two factors. The results showed that ED (R3) at planting distances of 7 and 14 cm achieved the highest DGR, ranging from 3.46%/day (J2, R3) to 4.55%/day (J1, R3) and 9.92%/day (J1, R3) to 10.91%/day (J2, R3). The intercropping between KA and ED had the second highest DGR, ranging from 3.81%/day (J3, R1) to 8.21%/day (J2, R1). The highest DW: WW ratio was observed in ED (1:4.59; J2, R3). The highest CAW levels were found in the KA treatment (53.63 %; J1, R2). The intercropping treatment showed CAW levels from 48.70 (J2, R1) to 50.56 (J1, R1). In conclusion, ED planted at a distance of 7-14 cm had the most favorable effect on daily growth rate, dry weight to wet weight ratio, and CAW. Additionally, the intercropping method used for the first time in this research between KA and ED can also be employed to increase seaweed production.
Wearable Devices Enable Long COVID Patients to Decrease Symptom Severity: A Case Series From Pilot User Testing
Authors: Goosen Andrea , Foster-Bonds Romina , Vogel Julia Moore 
Published: December 2024

Purpose:
Long COVID is a debilitating condition that is estimated to affect over 65M individuals across the world after a Coronavirus Disease 2019 (COVID-19) infection and has no broadly effective treatments. People with Long COVID have reported that pacing helps manage their symptoms, but it is difficult to implement. Based on experiences in the Long COVID community, we hypothesized that wearable devices can help individuals pace and reduce their Long COVID symptom severity.

Methods:
To inform the design of a larger study, we performed user testing by distributing Garmin® devices, the study surveys and pacing educational materials to 11 individuals with Long COVID, and conducting interviews to learn about their experience.

Results:
Eight of the 9 (89%) individuals reported that the information provided was helpful for their symptom management, and 2 testers did not complete the final survey. Four (44%) users had not used a wearable device before and none had trouble setting up their device. Due to the limited sample size and lack of control group, generalizability is unknown.

Conclusions:
The most user testers reported that the study materials were helpful for their symptom management. These results are a promising indication of the potential for wearable devices and educational materials to help individuals with Long COVID, and potentially other chronic conditions such as myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS), decrease symptom severity.
Synergistic Effect of Dual-Focus Soft Contact Lenses and 0.05% Atropine on Myopia Control in Children With Rapidly Progressing Myopia
Authors: Yum Hae Ri , Han So Young , Park Shin Hae , Shin Sun Young 
Published: December 2024

Objectives:
The aim of this study was to evaluate the combined effect of dual-focus soft contact lenses (CLs) and 0.05% atropine in the control of myopia.

Methods:
A retrospective study was conducted on 142 myopic children aged 7 to 13 years. A single nightly instillation of 0.05% atropine at bedtime was prescribed if the rate of myopia progression exceeded −1.00 D/year. After 1 year of treatment, patients who exhibited myopia progression of more than 0.75 D/year or an increase in axial length of more than 0.25 mm/year were additionally treated with dual-focus soft CLs (MiSight) alongside 0.05% atropine (Combination group, n=71). By contrast, patients who showed myopia progression of less than 0.50 D/year and axial elongation of less than 0.20 mm/year continued treatment with 0.05% atropine only (Monotherapy group, n=71). Subjects in the combination group were further divided into high myopia and low/moderate myopia subgroups, using a cutoff of −6 D.

Results:
Myopia progression and axial elongation were significantly slower after the addition of dual-focus soft CLs to 0.05% atropine in the combination group (P=0.001 and P=0.012, respectively). The combination group exhibited statistically significantly faster myopia progression than the monotherapy group before the addition of dual-focus soft CLs (both P<0.001), but no significant difference in myopia progression between the two groups was observed afterward (P=0.504 and P=0.479, respectively). The inhibition of axial elongation was more pronounced in the low/moderate myopia group compared with the high myopia group (P=0.028).

Conclusions:
The combination of dual-focus soft CLs and 0.05% atropine is an effective treatment strategy for controlling myopia in children with rapidly progressing myopia. The additive effect was greater in children with low/moderate myopia than in those with high myopia.