bluuebunny/crossref_metadata_2025_split huggingface dataset:
Livelihood Assets of Small-Scale Fisherman in Tanah Merah District, Indragiri Hilir Regency, Riau Province, Indonesia
Authors: Bathara L , Nugroho F , Yolandika C , Hamzah G 
Published: December 2021

Abstract
People in Tanah Merah Village, Tanah Merah Subdistrict, Indragiri Hilir Regency generally have a livelihood as fishermen. Fishermen can be said to be prosperous if they have good control over their livelihood assets. Livelihood assets consist of human, natural, social, financial and physical resource assets. This study aims to: (1) find out the meaning of the sustainable livelihood approach, (2) find out the livelihood assets of small-scale fishermen and (3) determine the condition of the livelihood assets of small-scale fishermen. The research was conducted in Tanah Merah District, Indragiri Hilir Regency, Riau Province. Respondents from this study were 45 people. The method used in this research was survey method. The data analysis used was descriptive analysis. Descriptive analysis was used to generate an overview of the data that has been collected based on the respondents’ answers through the distribution of items from each variable. The presentation of the data was done by cross tabulating according to the parameters of several aspects of the assets that support fishermen’s livelihoods. The result showed that the livelihood assets of small-scale fishermen namely natural assets, human resources, social, financial and physical are in the medium category. The acquisition of this value can indicate that the control of the livelihood assets of small-scale fishermen in Tanah Merah Village is not sustainable.
Fishing Ground Mapping of Demersal Fish in The Riau Islands Province Waters Related to the Oceanographic Factors
Authors: Sambah A B , Fardilah M F F , Fuad M A Z , Rahman M A 
Published: December 2021

Abstract
Research on the potential fishing ground for demersal fishing is a way to determine the areas that have the potential for fishing activities. Potential fishing ground mapping can be done by observing the dynamics of oceanographic parameters. The use of satellite imagery helps in providing oceanographic data in order to study the variability of oceanographic parameter. The aim of the study was to analyse the relationship between oceanographic parameter and demersal fish catch in order to validate potential fishing grounds for demersal fish. This research has been conducted in the waters of the Riau islands. Field observations and data collection including surveys of fishing grounds and identification of fish catches were carried out during March to August 2020. To support the analysis, Aqua-Modis Level-3 satellite data was used to observe the oceanographic variations. The data used in the analysis consisted of fishing grounds coordinate information, catches, sea surface temperature, chlorophyll-a, water depth, and salinity. The results showed that during the period 2010-2020, oceanographic dynamics did not experience significant changes or tended to be stable. Most of the research areas indicated appropriate categories for fishing activities based on the research parameters analysis. The correlation of the research parameters described a significant effect on fishing activities.
Risk Assessment Fishing Vessel Based for the Intact Ship Stability
Authors: Santoso B , Romadoni R , Suzdayan S , Nasution P 
Published: December 2021

Abstract
Application of safety assessment and risk analysis using a risk-based approach for ship stability in ship operations at sea. However, there are currently no specific criteria and computational methods for risk assessment of ship stability. Based on the stability requirements for fishing activities at sea, the ship stability criteria will be explained in detail in this study. Calculation of stability used to obtain the GZ enforcement arm is carried out with the help of software for the shaking period using the International Maritime Organization (IMO) formula. Next, how to calculate parameters and determine certain coefficients for risk assessment of ship stability, and how to redraw the stability curve. Finally, proposed method is applied to ship model with comments and recommendations for monitoring to provide and overview. The study result indicate that the five loading conditions that occur on the ship have good stability by the criteria set by the International Maritime Organization (IMO). The value of GMt in each condition includes condition 1 and so on, 0.48; 0.48; 0.47; 0.46; 0.43. The results are presented in the form of F-N. Finally the sensitivity of the model is evaluated along with the assessment of associated uncertainties. The FN graph represents acceptable areas and unacceptable areas. Based on the results of data processing, the highest GM at GM Load-case 5 0.638 meters is in the Acceptable area. While Load-case 1 to Load-case 4 GM values sequentially Load-case 1: 0.487 meters; Load-case 2: 0.488 meters; Load-case 3: 0.47 meters; Load-case 4: 0.468 meters; is in an unacceptable area Unacceptable.
Role of Traditional Leaders in Conservation of Fishery Resources in Mandah District Indragiri Hilir Regency Indonesia
Authors: Deliana E , Febriani S , Ferawati F 
Published: December 2021

AbstractFishery resources in Mandah Subdistrict, Indragiri Hilir Regency in Riau Province, has considerable potential and are important resources for the community. However, the utilization of these fishery resources is sometimes carried out in ways that violate the provisions, both positive legal provisions and provisions in customary law that live in the Mandah community. For this reason, it is necessary to examine the role of traditional leaders in conserving fishery resources in Mandah District. The research method used is sociological legal research, with the main data source being primary legal materials, namely binding legal materials, both written and unwritten. The result of the research is that traditional leaders have an important role in conserving fishery resources. They act as institutions that disseminate customary provisions, receive reports on violations of the law that occur and become mediator or judges for violations of the law, especially in the field of fishery resources. Traditional leaders in Mandah play an important role in preserving fishery resources due to the geographical location of Mandah Subdistrict which is quite far from the Regency Capital, causing the government apparatus and legal apparatus on duty in Mandah to be limited in number. In addition, through sanctions against perpetrators of violations, traditional leaders contribute to the protection of fishery resources in Mandah District.
Application of Aeration Injection to Increase Dissolved Oxygen of Surface Water in The Floating Net Cage
Authors: Cahyadi A , Zulkarnain R 
Published: December 2021

Abstract
Cirata Reservoir is a place for fish cultivators who mostly cultivate tilapia using floating net cages. However, water quality conditions, especially dissolved oxygen levels, which play an important role in tilapia culture in floating net cages are always uncertain and affect the growth of tilapia. Therefore, artificial aeration is needed that is able to increase dissolved oxygen levels so that it is suitable for tilapia culture by using Aearator Dua Lapis (ADL) engine. This study aims to inject dissolved oxygen into the surface layer of the reservoir by applying the ADL engine with gasoline. ADL operated at 1800, 4500, and 5500 rpm with a torque of 3.5 N/m2 and the DO value is recorded every 10 minutes up to 1440 minutes, the results of DO value were recorded and analyzed by using descriptive statistic and statistically using ANOVA with a single factor showed that the rotation has a very significant effect on the resulting DO value (p<0.01). For ADL operation in floating net cages, 4500 rpm rotation was used at certain depth (0.4 m; 1 m; 1.5 m) and the DO value measured at 4.00 am to 2.00 am (22 hours) in aerated floating net cages and without aerated floating net cages.Aerated floating net cages have a higher DO value, especially at a depth of 0.4 m. ADL as an aerator in floating net cages has a very significant effect (p<0.01) in increasing the DO value in floating net cages at a depth of 40 cm to 1.5 m. This proved that the use of ADL is able to increase the DO value in floating net cages in the first layer with a depth of up to 4 m and ADL also can be used as emergency aeration or supplemental aeration for tilapia culture.
Capture Fishery Resources of Citanduy River, West Java
Authors: Sawestri S , Suryati N K , Muthmainnah D , Pamungkas Y P 
Published: December 2021

AbstractCitanduy river is one of the priority watersheds in West Java. Information on capture fisheries resources in Citanduy, however, river is limited. The aim of this study was to assess the information of capture fisheries resources in that river. The method used in this study was a survey method, by collecting data in the field, and then analyzed it in the laboratory. This research was conducted in 2018. Samples of fish were collected through the active participation of fishers with various types of fishing gear. The identification of fish and fishing gear used some references. Some fish caught were preserved in formalin solution and identified. The dominant catch in Citanduy River isMystacoleucus marginatusandCyprinus carpio. Other economic fishes catch in Citanduy river areOreochromis niloticus, Osteochilus vittatus, O. mossambicus, Trichogaster trichopterus, Hemibragus nemurus, Hampala macrolepidota, Channa striata, Moolgarda seheli, andGlossogobius giurus. The fishing gears used by fishers are hooks and lines, cast nets, scope nets, traps, and gill nets. The inland capture fishery in Citanduy river is still a secondary sector for the interests of local government.The current condition of capture fisheries in Citanduy is not the main livelihood for fishers. The inland capture fisheries in Citanduy is still using a simple fishing gear and do not have more complex tools. Citanduy river has potential source of economic and protein food, particularly for local community. Regarding in these potential, management of environment could be the major domains in fisheries management. The policy of local government in handling non-selective fishing gear and restocking activity could be maintain the sustainable fish resources in Citanduy river.
Profile and Prospects of Fish Processing In Rokan Hilir Regency
Authors: Dahlia D , Effendi I , Elizal E , Listihana W D , Wiyati R , Arizal A , Zargustin D 
Published: December 2021

Abstract
Post-harvest handling and processing of fishery products is an aspect of the development of the fisheries industry in an area. Rokan Hilir Regency is one of the main fish-producing areas in Riau. This study aims to describe the profile of processed fishery and its development prospects in the future. This research was conducted from July to September 2020. Primary data was obtained through direct field observations of fish processing objects and accompanied by interviews with the owners and workers of the fish processing businesses. Interviews were also conducted with community leaders, related industries, government officials and academics. Secondary data was collected from reports of government and other agencies. Includes SWOT analysis, situation analysis, participatory analysis, problem analysis, objective analysis, and development analysis. Processed fish products in Rokan Hilir are; dried prawns, salted fish, prawn powder, fish meal, dried trash fish, fish lamps, shrimp paste and smoked fish. The centers for producing fish are sub-districts; Bangko, Pasir Limau Kapas, Sinaboi, Babussalam and Rantau Kopar. The long distance to consumers, difficulty in accessing production centers and limited supporting infrastructure are problems in processing fishery products in this area. The types of processed fish products that are more prospective are shrimp flour, salted fish and smoked fish. The recommended development strategies include; human resource training in the field of business management, providing stimulants and ongoing guidance from the government and industry.
Recent Developments in Water Treatment by Cellulose Aerogels from Agricultural Waste
Authors: Nguyen Phuong X T , Ho Kim H , Nguyen Chi T X , Do Nga H N , Pham Anh P N , Do Tai C , Le Kien A , Le Phung K 
Published: December 2021

Abstract
Water pollution caused by inorganic and organic compounds affects seriously health risks and the destruction of the water balance of the ecosystem. Water remediation is one of the greatest challenges of the modern age, which is faced by several countries in over the world. Many advanced technologies have been developed in recent years to manage this alarming problem. One of the recent research directions is to utilize agricultural waste, which is an abundant, low-cost, eco-friendly source, to manufacture cellulose aerogels for the removal of heavy metals, dyes, and oils from contaminated water. This review paper focuses on the latest green fabrication of bio-aerogels from various cellulose-based plant waste and studies on the kinetics and influence of factors such as contact time, pH solution, initial concentration, and temperature on the adsorption process to better understand the mechanisms of water treatment by the cellulose aerogels. Based on the discussion and summary, the potential of agro-waste sources in their value-added chain by developing efficient water treatment cellulose aerogels is comprehensively overviewed.
Enhancing the photocatalytic activity of Ag-TiO2/SiO2 and its potential application in water treatment
Authors: Ho Thi-Ngoc-Suong , Ngo Manh-Thang , Le Minh-Vien 
Published: December 2021

Abstract
Ag-doped TiO2/SiO2 with visible light response was prepared by a simple sol-gel method using titanium w-butoxide (TNB), tetraethoxysilane (TEOS) as precursors, and silver nitrate (AgNO3). The synthesized Ag-TiO2/SiO2 were characterized by SEM, XRD, PL (photoluminescence) emission and UV-Vis absorption spectroscopy. Their photocatalytic activities were evaluated by treating aqueous solutions of phenol under simulated visible light illumination. The role of silver doped was investigated in the range 1% – 5% (molar ratio), resulting in the best bandgap value of 2.93 eV for Ag(3%)-TiO2/SiO2 compared to 3,18 eV for the un-doped TiO2/SiO2. Consequently, the best phenol treating yield – about 97% after 4 hours – was obtained using Ag(3%)-TiO2/SiO2. So the synthesized Ag(3%)-TiO2/SiO2 might serve as a potential photocatalyst for water treatment using visible lights.
High surface area MnO2 catalysts prepared by a metastable aqueous-aqueous interface method and their catalytic oxidation activity
Authors: Phuong Nguyen Thi Truc , Ngoc Tran Thi Hong , Tu Le Nguyen Quang , Long Nguyen Quang 
Published: December 2021

Abstract
In this work, the metastable aqueous-aqueous interfacial approach was used to prepare MnO2 with enhanced surface area, which helps to save energy, decrease cost and protect the environment. The material characteristic success was proven through using powder X-ray diffraction for the crystalline properties and N2 adsorption-desorption isotherm for high surface area. The relationship between the calcination temperature and the crystallinity as well the specific material surface area was also interested. The catalytic decomposition of hydrogen peroxide was investigated by the closed system measuring produced oxygen. After the H2O2 decomposition comparison between synthesized samples and commercial MnO2 in terms of both the efficiency and the speed, the M-200 sample was considered as a typical sample with outstanding performance to examine the reaction conditions (H2O2 solution concentration, catalyst amount and reaction temperature). The optimal reaction condition results are 0.9% H2O2 solution concentration, 0.2g/L catalyst, and room temperature. Besides, the leaching test and the catalytic regeneration were also conducted.
The impact of surfactants on nanosphere zinc phosphate synthesis
Authors: Nguyen Van-Tuan , Thi Ngoc Tram Nguyen , Thi Ha Nguyen , Ngo Thanh-An 
Published: December 2021

Abstract
Recently, biomaterials have attracted widespread concern because of their compatibilities with live bodies. Among advanced biomaterials, zinc phosphate nanospheres particles are potential candidates for delivering drug and dental restorations. However, their fabrication methods are complicated and non-eco-friendly. In this study, we report the impact of surfactant supplements on the wet chemical preparation of zinc phosphate. Experimentally, Di-propylene glycol (DPG) and Trimethylolpropane (TMP) were added to the solution in the preparation step to compare the morphology of synthesized particles with the non-surfactant process. The morphology was examined by transmission electron microscopy. The addition of surfactants changed particle shape to spherical with a diameter of less than 200 nm. Moreover, the synthesized particles with DPG had a solid form, while those with TMP had a hollow structure (a diameter of 50-70 nm and shell thickness of 5-7 nm). Furthermore, X-ray diffraction, Fourier transforms infrared, and Thermogravimetric analyses analyzed properties of hollow particles.
Cerium-modified cryptomelane: an antibacterial activity against Pseudomonas aeruginosa
Authors: Tran-Thuy Tuyet-Mai , Nguyen-Thi Ngoc-Thuy , Tran Trong-Phu , Tran-Le Ngoc-Hung , Dang Minh-An , Nguyen Quang-Vinh , Nguyen-Kim Minh-Tam 
Published: December 2021

Abstract
K-OMS-2 (non-modified sample) and Ce-modified OMS-2 with different Ce-loading amounts were prepared by the refluxed method. The cryptomelane structure and elemental composition of synthesized samples were characterized with X-ray diffraction (XRD) and inductively coupled plasma mass spectrometry (ICP-MS), respectively. ICP-MS analysis revealed ~0.06 – 0.11 of K/Mn molar ratio and the Ce-loading amounts increased from 0 to —11.27 wt.% under increasing Ce-precursor concentration. Antibacterial activity against Pseudomonas aeruginosa was evaluated by the agar well diffusion method. The antibacterial ability against Pseudomonas aeruginosa was not recorded over K-OMS-2 (Ce0; 4.5 wt.% of K; 0 wt.% of Ce) and Ce3 (0.89 wt.% of K; 11.27 wt.% of Ce) samples while Ce2 sample (1.89 wt.% of K; 8.7 wt.% of Ce) showed a comparable antibacterial activity against Pseudomonas aeruginosa with ~12 mm of inhibition-zone diameter. This suggested the potentiality of using metal-modified cryptomelane in acceleration of antimicrobial ability.
Studying on cytotoxic activity of ethyl acetate extracts and isolated substances from cultured Isaria cicadae F0004 in Vietnam against the MCF-7 cell lines and Jurkat cell lines
Authors: Dung Nguyen Chi , Ngoc Ha Thi , Ninh Pham Thi My , Phu Dang Hoang , Hiep Dinh Minh , Suong Ngo Ke 
Published: December 2021

Abstract

Isaria cicadae species of the Isaria genus have been isolated in many Asian countries, including China, Korea, Thailand, and Vietnam. Furthermore, Isaria cicadae content potential medicinal source in the prevention and treatment of cancer, strengthening the immune system. This study aims to investigate the cytotoxicity against MCF-7 and Jurkat T cell lines of the extract and isolated potential compounds from Isaria cicadae in Vietnam. The results showed that ethyl acetate (EA) extract from the fruit body of the Isaria cicadae F0004 strain had high cytotoxic activity against both MCF-7 and Jurkat cell lines at the concentration of 100 μg/mL with the IC50 value was reached 17.15 ± 1.68 and 10.37 ± 0.61 μg/mL respectively. The constituents of the EA extract from the fungus Isaria cicadae F0004 were isolated by column chromatography and preparative chromatography. Then, the structures were determined by spectroscopy 1H-NMR, 13C-NMR. It was obtained 5 compounds including uracil, 1-0-ethyl-ß-D-ribofuranose, ergosterol, p-hydroxybenzoic acid, protocatechuic acid. Protocatechuic acid isolated from Isaria cicadae F0004 that showed cytotoxic activity on MCF-7 and Jurkat cell lines with IC50 values of 5.97 ± 0.36 and 3.15 ± 0.64 (mM) respectively. This study is the basis for further research on the cytotoxic activity of the fungus Isaria cicadae F0004 in vitro.
Investigation of the bioactivities of extracts from Vernonia Amygdalina Del
Authors: Thanh Nga Phan Thi , Tran Thanh Truc 
Published: December 2021

Abstract
The antibacterial, antioxidant activity, and anticancer of the extract from Vernonia Amygdalina Del leaves, was assessed towards 6 selected bacteria, in the DPPH test, as well as on hepatic (HepG2), blood (K562) cancer cell lines. The DPPH assay revealed that the highest DPPH radical scavenging activity with the warm ethanol extract (IC50 = 259,03 ± 5,42 μg/mL). And the ethyl acetate extract showed a high antibacterial effect expressed as minimum inhibitory concentration (MIC = 100 mg/mL) against Gram-positive bacteria. At the concentration of 250 mg/mL, this extract also demonstrated its ability to resist blood cancer cells K562 (with a survival rate of 25%) and liver cancer cells HepG2 (with a survival rate of 0%).
Effects of enzymatic treatment on the chemical composition, antioxidant and rheological properties of cactus cladode juice
Authors: Nguyen Anh L. , Le Ngoc Lieu 
Published: December 2021

Abstract
Cactus (Opuntia ficus-indica), commonly referred as prickly pear or nopal cactus, belongs to the family Cactaceae. It has attracted domestic and international industries’ attention owing to its nutritional and health benefit potentials. In this project, the quality of the cactus cladode juice after treated with the enzymes Pectinex Ultra SP-L and Viscozyme was investigated in terms of total phenolic content (TPC) and 2,2-diphenyl-1-picrylhydrazyl (DPPH) free radical scavenging activity. There were significant increases in the effectiveness of these enzymes as the concentration increased from 0.05 to 0.15% w/w. Among different concentrations, 0.15% w/w produced a higher yield and high-quality juice. Furthermore, the result indicates that prolonging the incubation duration could improve juice yield but this occurred only within the first hour of reaction, which the highest yield was obtained at 0.75 h. At these conditions, the combination of Pectinex Ultra SP-L and Viscozyme at ratio 1:1 (w/w) showed the most effective on juice yield improvement and 2,2-diphenyl-1-picrylhydrazyl free radical scavenging activity, while the highest total phenolic content was obtained when treating with Pectinex Ultra SP-L. Particularly as compared to the control sample, the juice yield increased from 53% to 76%, the TPC enhanced from 47 μg gallic acid equivalent (GAE)/mL to 70 μg GAE/mL, and the DPPH free radical scavenging activity improved from 277 μg ascorbic acid equivalent (AAE)/mL to 470 μg AAE/mL. Overall, the quality of cactus juice was better with enzymatic treatment than that of the untreated juice. The data also showed that the cactus juice behaved as shear – thickening fluids at room temperature.