bluuebunny/crossref_metadata_2025_split huggingface dataset:
Abundance, characteristics, and distribution of microplastics in Banda Sea and Seram Sea, Indonesia
Authors: Widiaratih Rikha , Maslukah Lilik , Triyulianti Iis , Rugebregt Marsya Jaqualine , Nurhidayat  , Hascaryo Anom Puji , Sobaruddin Dyan Primana 
Published: August 2023

AbstractThis study recorded the abundance, characteristics, and distribution of microplastics (MPs) in the surface water in the Banda Sea and Seram Sea. The Banda Sea has known for its complex bathymetry with the shape of a basin in the west and a Sahul Shelf in the east. Due to its unique topography, it controls the water mass exchange in Indonesian waters. The Banda Sea and Seram Sea are dominated by the deep sea with bathymetry of more than 1000 m. Station observation consists of 5 stations in the Banda Sea and 3 stations in the Seram Sea. The microplastic abundance in the surface waters from the Banda Sea and Seram Sea ranged from 4.69 to 22.48 items/L with an average abundance of 14.07 items/L. The highest abundance of MPs was found in Station 1 of Banda Sea due to the closest to Ambon as the capital of Maluku Province. The dominant shape of MPs found such as fibre, fragment, and pellet. The polymer type of MPs found were PET, HDPE, LDPE, PVC, PP, and Nylon. Generally, the abundance of MPs on the surface of the deep-sea area was found lesser than in the coastal area since the MPs distributions are influenced by hydrodynamics and anthropogenic activity.
Seagrass Ecological Quality Index of Seagrass Meadows in Jepara Waters, Central Java, Indonesia
Authors: Riniatsih Ita , Hartati R , Widianingsih W , Mahendrajaya R T 
Published: August 2023

Abstract
In the coastal ecosystems, seagrass meadow has an ecological function as a buffer area for the health of the coral reef. In addition, this is a place to live and shelter for many early stages of marine species. Besides, they serve many services, one of which is helping mitigation of climate change by capturing and storing carbon. Because of these essential functions, this study aimed to assess the condition of seagrass meadows in Jepara (i.e., Teluk Awur, Bandengan, Panjang Island, and Blebak waters), Central Java, Indonesia, about their ecosystem quality index using. The Seagrass Ecological Quality Index (SEQI) aims to determine five resilience parameters, i.e., the richness of seagrass species, seagrass cover, macroalgae cover, epiphyte cover, and water transparency. The results of the present works showed that generally, the seagrass ecosystem in Jepara waters is in the medium Category, the SEQI of Bandengan and Panjang Island are in the moderate Category, at the poor Category in Teluk Awur and Blebak Beach. This work found the species diversity and clear water conditions in the intermediate Category. In addition, there was a decreasing trend of habitat seagrass cover and increasing epiphyte abundance and cover. This condition is closely related to the resilience of the seagrass ecosystem. Therefore, to respond to these conditions, ecological health and seagrass ecosystem conservation efforts must be focused on improving ecosystem resilience.
Relationship between osmoregulation and growth patterns of Scylla serrata gonad maturity levels in tapak mangrove waters, Semarang, Indonesia
Authors: Jati O E , Putra E A , Anggoro S , Suryanti S 
Published: August 2023

Abstract
Mud crab (Scylla serrata) is a species that makes up biodiversity in mangrove areas spread across the coast of the archipelago, one of which is in Tugu District, Semarang City which has a mangrove area that is still relatively good. There is a need for research to determine the viability of Scylla serrata based on environmental conditions, especially salinity which affects the osmoregulation and growth of mud crabs individually to populations. This research aims to determine osmoregulation patterns, growth patterns, and their effect on the gonadal maturity level of mud crabs. The research was carried out on April 17th 2021 at the Tapak Mangrove Area, Tugurejo Village, Semarang, Indonesia. The research object was Scylla serrata to determine hemolymph osmolarity, carapace width, weight, gonadal maturity level, and media water quality. The research method uses a descriptive exploratory method with correlation analysis. Correlation (r) analysis was carried out to determine the relationship between the two variables, namely between the value of the level of osmotic work and gonadal maturity. The osmoregulation pattern is hypoosmotic and hyperosmotic with hemolymph osmolarity at station 1 ranging from 840-899 mOsm/I H2O and station 2 ranging from 857-929 mOsm/I H2O. The Osmotic Work Rate (TKO) value at station 1 is 1-40 mOsm/I H2O and at station 2 is 2-52 mOsm/I H2O. The growth pattern is negative allometric with the condition factor at stations 1 and 2 being more than 1 (K > 1) and a K value exceeding 3 which means it is not flat. TKG (Gonadal Maturity Level) has a negative linear correlation with TKO.
Application of Acoustic Doppler Current Profile (ADCP) to Estimate Suspended Solid Concentration (SSC) During the Tidal Phase, Case Study: Donggala, Palu.
Authors: Siagian Hendry , Ismanto Aris , Prasetyawan Indra Budi , Sukmadewa Yoga , Hoir Ilham Fathul , Putra Tri Widya Laksana , Pranata Adi 
Published: August 2023

Abstract
Understanding various types of kite material, known as suspended solid concentration (SSC), affects the strength of the reflected acoustic signal. SSC is a concentrate that floats in a body of water, the character of the increase in concentration is strongly influenced by the transport medium, namely ocean currents and tides. The use of the Acoustic Doppler Current Profile (ADCP) in this study was developed to estimate the SSC at each elevation change in the tidal phase. This study aims to identify the relationship between the intensity of scattering values to estimate SSC, and to compare SSC temporally in the tidal phase. ADCP measurement is implemented at Donggala, Palu Waters to collected tidal behavior and strength signal during 30 days measurement, with 8 layers profile. Data analysis by classifying the relative acoustic backscatter value. The conversion of the scattering value obtained has a range between 20 - 150 db. The classification of scattering is as follows 70-77 db, 65-69 db, and 60-64 db respectively near the bottom, middle and surface waters. The results of the linear echo intensity (db) relationship with SSC observation (10log) have a strong relationship with an accuracy of R values 0.936. The characteristics of SSC at neap tide and ebb current elevation were relatively higher, with concentration values ranging from 80 – 82 mg l-1, while other conditions were 77 – 79 mg l-1. This study concludes that the intensity relationship can estimate SSC with an error of 2.61% with average layer difference concentration 0.59 mg/l.
Two dimensional Hydrodynamic Simulation in Labuan Bajo Waters, Indonesia.
Authors: Wulandari Siti , Ismanto Aris , Sugianto Denny Nugroho 
Published: August 2023

Abstract
Based on its strategic location, Labuan Bajo is a golden triangle between Komodo Island and Toraja Land as a national tourism sector. This makes information about the condition of Labuan Bajo waters very important. One of the oceanographic parameters that have an important role in determining the condition of a body of water is ocean currents. Ocean currents are the movement or displacement of water masses caused by waves, wind, water density, and pressure. In their movement, currents have a direction and speed that can form ocean current patterns. One method that can see patterns of sea surface currents is two-dimensional hydrodynamic modeling. This study aims to identify patterns of surface currents and tides that occur in Labuan Bajo waters. The method used in this study is quantitative descriptive with a two-dimensional hydrodynamic modeling approach along with nested-model techniques to provide the model results with a smaller resolution to get the phenomenon that occurs in those waters. The data used is bathymetry, wind, tide, and High-Frequency Radar (HF Radar) data as current validation. The results of surface current simulation in Labuan Bajo waters have the highest current of >1.12 m/s in the Western season and the lowest speed of 0.88 m/s in the Transition I season. The wind pressure gradient in the Western season affects the current speed in that season.
The Fat Oxidation that Occurs During Storage of Dried “Dendeng” with Various Spices
Authors: Aisman  , Yenrina Rina , Taib Gunarif , Rahmayanti Mia Fitri 
Published: August 2023

Abstract
In West Sumatra, several spices are frequently used when making dry dendeng (beef jerky). Spices are frequently added to jerky to impart flavor, color, and numerous bioactive chemicals that serve as antioxidants. This study intends to examine the influence of various spice changes on the fat oxidation that occurs during preserving dry jerky. Jerky A (Salt 25 g), Jerky B (salt 25 g, Garlic 50 g, Ginger 25 g, and Lime 2 ml), Jerky C (Salt 25 g, Garlic 25 g, Ginger 50 g, Shallots 25 g), Jerky D (Salt 25 g, Garlic 25 g, Ginger 50 g, Shallots 25 g, Coriander 2 g, Coconut Water 1,000 (Salt 25 g, Garlic 25 g, ginger 25 g, coriander 2 g, tamarind 2 g, orange leaves 2 g, galangal 50 g). The jerky has been seasoned with spices, dehydrated, and then preserved for 0 days, 20 days, 40 days, and 60 days. After 60 days of storage, the amounts of free fatty acids, TBA (Thio Barbituric Acid), and water content increased in beef jerky. Jerky B has the lowest fat oxidation, while Jerky A has the highest fat oxidation. The amount of oxidation in dry jerky during storage varies depending on the variety of seasonings used
Evaluation of land suitability as the basis for sustainable crop development
Authors: Suntoro S , Dewi W S , Syamsiyah J , Mujiyo M , Herdiansyah G , Widijanto H , Herawati A 
Published: August 2023

Abstract
This study aims to determine the potential and limitations of land in Ngawi District, East Java, Indonesia, for cultivating rice, corn, and soybeans. The research consists of a four-stage field study conducted in Ngawi Regency: (1) organization of land units; (2) determination of observation points through stratified proportional sampling for each land unit; (3) field surveys; and (4) laboratory analysis. The land evaluation was conducted in accordance with the FAO Guidelines for Land Evaluation for Rainfed Agriculture. The results of the research indicate that 46,417.7 ha (88.1%) of the land area is highly suitable (S1) for rice and 49,286.6 ha (72.1%) is marginally suitable (S3) for corn due to poor drainage. Approximately 62,499 ha (91.4% of the total land area) are marginally suitable (S3) for soybean cultivation. There were suggested five models of land management: (1) intensive rice farming; (2) a relay cropping system for rice-corn or rice-soybeans; (3) multiple cropping systems for corn, soybeans, or rice; (4) a mono-cultural system for rice, corn, or soybeans; and (5) an agroforestry system for Albizia chinensis, corn, and soybeans. Farmers’ awareness of organic management is crucial for enhancing land productivity and maintaining soil fertility in Ngawi Regency.
The Status and Stock of Soil Nutrients under Different Land Ownership Management of Rice Fields in Kuranji District Padang West Sumatra
Authors: Hermansah  , Astuti Yuni Sri , Darfis Irwan , Maira L , Emalinda O 
Published: August 2023

Abstract
This study aims to determine the status and stock of soil nutrients in three types of land ownership management. This research was conducted on smallholder farmers (SF), tenant farmers (TF), and owner farmers (OF) in Kuranji District, Padang, West Sumatra, and at the Soil Laboratory of the Faculty of Agriculture, Andalas University from March to September 2022. The range of nutrient status in the three types of land ownership is 0.06-0.35% C-organic and 0.06-0.13% N. The concentration ranges of Ca, Mg, K, Na, P, and Si, respectively, were 0.52-0.79; 0.58-1.34; 0.07-0.12; 0.03-0.09 cmol.kg-1and 2.52-12.7; 31.73- 49.33 ppm. The results showed that each management type’s status of organic carbon in soil was deficient. This result was presumably due to miss management of straws. The highest concentrations of Ca, Mg, K, and Na were found in smallholder farmers’ fields (SF), while the lowest concentrations were found in tenant farmers’ fields (TF). The stock of soil nutrients shows a similar trend to the nutrient status of the soil. The dose of fertilizer by SF and TF was 129.5 kg/ha N; 37.5 kg/ha P2O5; 37.7 kg/ha K2O, while OF is 176 kg/ha N, 65 kg/ha P2O5, 45 kg/ha K2O. The soil nutrient status among the farmer groups is not significantly related to the amount of fertilizer application. It is recommended to give a dose of fertilizer following the recommendations that have been set and balanced with the proper management of remaining straw after harvest for sustainable soil fertility and agriculture production.
Analysis of Factors Affecting Rice Production in Solok Regency
Authors: Aisy Rohadatul , Sari Devni Prima 
Published: August 2023

Abstract
Solok district is the largest rice-producing center in West Sumatra, known as “Bareh Solok,” with most of the population working as farmers. Land area, labor, seeds, fertilizers, capital, pesticides, and irrigation influence increased production. These seven factors are interconnected and related to each other. Hence, this study aimed to determine the factors influencing rice production in Nagari Cupak, Gunung Talang District, Solok Regency. The type of research used is applied research. This study has a sample of 89 respondents; furthermore, the analysis uses the factor analysis method. The results of this study indicate that the first factor affecting rice production consists of land area, labor, seeds, and pesticides. The second factor affecting rice production consists of fertilizer, capital, and pesticide variables.
Role of biochar on improvement of physical characteristics of re-vegetated ex coal mined soil and production of black corn (Zea mays L. var. Black Aztek)
Authors: Yulnafatmawita  , Putri Tika , Hermansah  , Haris Z.A. 
Published: August 2023

Abstract
Ex coal mined soil generally had problem for farming activities, even though it had been re-vegetated for few years. This research was aimed to determine the effect of biochar derived from corn cob to improve the physical characteristics of ex coal mined soil and production of black corn. A pot trial was conducted in Glasshouse at Andalas University, Padang. Soil was taken from re-vegetated of ex coal mined soil in Sawah Lunto, West Sumatra, Indonesia. The soil was mixed with biochar at 4 different doses (0; 0.5; 1.0; and 1.5%) of the weight basis. The experimental units were allocated based on Completely Randomized Design. Parameters analyzed were soil texture, bulk density (BD), total soil pore (TSP), hydraulic conductivity (HC), soil organic matter (SOM), and plant available water (PAT), as well as corn production parameters. The result showed that biochar significantly increased the SOM. SOM content at 1.5% biochar application increased by 32.4% compared to the OM content of the soil without biochar (0 T ha−1). Improving SOM due to biochar application, improved the soil physical properties, especially it decreased the soil BD (r=-0.71); increased HC (r=0.65); TSP (r=0.71); PAW (r=0.86); aeration pore (r=0.54); field capacity (r=0.83); and decreased wilting point (r=-0.66). Biochar application also improved production of black corn. It linearly increased crop height (r=0.76); corn stalk dry weight (DW) (r=0.75); grain yield DW (r=0.75); shoot DW (r=0.74); and root DW (r=0.76). Biochar derived from corn cob could be used to improve physical properties of ex coal mined soil.
Viability and responsiveness of several varieties of brown rice to salinity stress on a seedbed
Authors: Barus Wan Arfiani , Susanti Rini , Khair Hadriman , Tarigan Dafni Mawar 
Published: August 2023

Abstract
This study aims to determine the viability and responsiveness of several varieties of brown rice to salinity stress on seedbeds. The study was conducted from December 2019 to January 2020. The study used a factorial randomized block design, namely varieties and soil salinity levels. The brown rice varieties (V) tested were: Inpari 24 (V1), Pamelen (V2) and Pamera (V3), then the level of soil salinity (S), consisting of S0 = 0, S1 = 4-5 dS/m2, S2 = >5-6 dS/m2 and S3 = >6-7 dS/m2 soil, each with 3 replications. The parameters observed were maximum growth potential, germination, vigour index, plant height, root length, root volume, and salt injury score. The results showed that salinity stress significantly affected all observation parameters. Different varieties produced different responses to salinity stress for maximum growth potential, germination, and root volume parameters. The interaction between the two treatments also significantly affected all observation parameters, and the Inpari 24 variety was the most adaptive to salinity stress on the seedbed.
Antioxidant serum gel formulation with a combination of secretome from mesenchymal stem cells and rosemary oil
Authors: Marlina  , Salman  , Filza H , Nur E , Poppy A N 
Published: August 2023

Abstract
Rosemary Oil (Rosmarinus officinalis) contains carnosic acid, carnosol, and rosmarinic acid, which are sources of active antioxidants. The Secretome of MSC has growth factors such as antioxidants that protect HDFs. This study aimed to obtain a gel formulation from secretome combinates with Rosemary Oil and test its effect as an antioxidant. The gel formulation contains Rosemary Oil as an antioxidant, propylene glycol as humectants, Carbomer 940 as a gelling agent, triethanolamine as an alkalizing agent, DMDM Hydantoin as preservative, and aquadest. The evaluation tests of gel preparations include organoleptic tests, homogeneity, viscosity, pH, dispersion, syneresis, and stability. Antioxidant activity test using DPPH method (1.1-Diphenyl-2 Picrylhydrazil). The results show the gel was in the form of a thick gel, cloudy white and yellowish, having a characteristic smell like rosemary plants. It also has ease of use, is homogeneous, has a cooling sensation, and has good solubility during washing. The gel has an average pH value of 6.39; viscosity <30,000 cp; the average dispersion value is 5.71 cm. Rosemary Oil gel preparations provide antioxidant activity, indicated by the IC50 value. Gel preparations with 5% secretome with 2.5% rosemary oil had an antioxidant activity with an IC50 value of 11.4501 μg/ml. Based on these results, it can be concluded that the Secretome with rosemary oil gel formulations were proven to have an antioxidant effect and showed an increase in antioxidant activity in the formula added with Secretome (P <0.05)
Effectiveness of Well Water Treatment Method with Electrocoagulation, Coagulation, and Electrocoagulation-Coagulation Using Alum as Coagulant
Authors: Nugraheni Putranty Widha , Maleiva Lalak Tarbiyatun Nasyin , Ramadhan Finar , Kusumawardhani Eka , Putra Leonardus Sandy Ade 
Published: August 2023

AbstractAll This study compares the effectiveness of well-water treatment with coagulation, electrocoagulation, and electrocoagulation-coagulation methods in Kubu Raya, West Kalimantan, following the quality standards of the Minister of Health Regulation No. 32 of 2017. This study used an alum and was varied by testing the parameters of turbidity, color, TDS, Fe, Mn, and pH. The study results on the mass variation of alum showed an increase in pH, and increases in TDS, color, turbidity, Fe, and Mn. With the electrocoagulation method, the efficiency results of increased pH were 3.88%, 22.22%, 32.77%, and 42.59%; decrease in TDS 46.34%, 54.07%, 86.79%, and 114.75%; color reduction 95.39%; 28.85%; 88.79%; and 80.02%; decreased in turbidity 99.45%; 99.80%; 99.32%; and 99.10%; decreased Fe concentration 96.60%; 98.99; 96.20%; and 96.99%; and decreased concentration of Mn 99.59%; 99.75%; 99.72%; and 99.75%. Processing with the electrocoagulation method with the addition of 0.5 g alum resulted in a decrease in pH of -29.62%; -26.29%; 13.33; and 15.37%; decrease in TDS of 24.92%; 24.23%; 21.356%; and 16.59%; decreased in watercolor 86.09%; 74.27%; 91.24; and 70.02%; decreased in turbidity value 99.44%; 99.31%; 99.54%; and 98.96%; decreased Fe concentration 97.98%; 96.48%; 97.11; and 98.22%, and a decrease in Mn concentration of 99.75%; 99.55%; 99.75%; and 99.75%.
Continuous motion of an electrically actuated water droplet over a PDMS-coated surface
Authors: Upadhyay Supriya , Muralidhar K 
Published: August 2023

Abstract
Electrically actuated linear motion of a water droplet over PDMS-coated single active electrode is analyzed from detailed experiments and modeling. In an experiment, continuous motion of the droplet is achieved when it is located over an active electrode with a horizontal ground wire placed just above in an open-electrowetting-on-dielectric configuration. Using a CCD camera, the instantaneous centroid position of the droplet is determined and its velocity is inferred by numerical differentiation. The edge-detected image is also used to determine the advancing and receding contact angles of the moving drop relative to the substrate. Motion of 2, 6, and 10 µl water droplets for voltages in the range of 170–270 V
DC is examined to investigate the effect of drop volume and voltage on drop deformation and velocity. The motion of the droplet is initiated by Young-Lippmann spreading at the three-phase contact line, followed by a nonuniform electric force field distributed between the active electrode and the ground wire localized at the droplet-air interface. Simulations carried out using COMSOL© Multiphysics with full coupling between the electric field and hydrodynamics are in conformity with experiments. A contact angle model with pinning and friction leads to close agreement between simulations and drop motion over a bare PDMS layer, particularly in terms of the relevant timescales. When contact line friction is neglected, the fully coupled numerical solution shows a good match with experimentally determined drop movement over a silicone oil-coated PDMS layer. Over both surfaces, continuous motion of the water droplet is seen to be achieved in three stages, namely, initial spreading, acceleration, and attainment of constant speed.
Research on the seagull optimization algorithm-based convolutional neural network rolling bearing fault diagnosis method
Authors: Xue Jijun , Liu Xiaodong , Xu Hao , Zhang Di 
Published: August 2023

Abstract
It is crucial to understand the rolling bearing fault diagnosis procedure since rolling bearings are frequently used in rotating machinery and if a failure occurs, it will interfere with the proper operation of the entire piece of machinery or piece of equipment. Deep learning is increasingly being used in mechanical fault diagnosis, with convolutional neural networks(CNN) being the most common type. In recent years, the rapid growth of artificial intelligence has caused fault diagnosis methods to evolve as well. A CNN fault diagnostic approach based on seagull optimization algorithm (SOA) is suggested and applied to the fault diagnosis of rolling bearings in order to address the issues with convolutional neural networks, such as high data requirements, unstable gradients, and optimization challenges. The seagull optimization approach is used to design a deep learning model by selecting the structural hyperparameters in the CNN model as efficiently as possible. The accelerated life experimental dataset for rolling bearings is trained using the optimized CNN model. The training outcomes of the CNN model on the dataset before and after optimization are compared, and the findings demonstrate that the suggested method has a superior optimization effect. As can be seen, the seagull optimization algorithm and CNN can be organically combined and applied to the fault diagnosis method for rolling bearings.