bluuebunny/crossref_metadata_2025_split huggingface dataset:
Nonlinear dependence of plasma potential and ion impinging energy on energy loss of edge localized modes
Authors: Dai S.Y. , Wang D.Z. 
Published: November 2019

Abstract
Particle-in-cell (PIC) modelling has been performed to investigate the impact of energy loss during edge localized modes (ELMs) on the plasma potential and ion impinging energy on the divertor target. A double-peak structure of the ion impinging energy has been identified under JET-relevant ELM conditions. The ELM burst leads to a strong increase in the potential drop in front of the target plate, which accelerates the cold ions from the downstream divertor and accordingly causes a peak value of ion impinging energy. Moreover, the great potential drop helps confine the fast electrons and leads to a reduction in the potential drop and ion impinging energy. The arrival of the upstream hot ions results in the second peak value of ion impinging energy. The maximum potential drop and ion impact energy show a linear dependence on the pedestal temperature. Further, a nonlinear dependence of the peak potential drop and ion impact energy on the ELM energy loss can be ascertained based on the PIC simulations.
On the universality of noiseless linear estimation with respect to the measurement matrix
Authors: Abbara Alia , Baker Antoine , Krzakala Florent , Zdeborová Lenka 
Published: November 2019

Abstract
In a noiseless linear estimation problem, the goal is to reconstruct a vector

from the knowledge of its linear projections

. There have been many theoretical works concentrating on the case where the matrix

is a random i.i.d. one, but a number of heuristic evidence suggests that many of these results are universal and extend well beyond this restricted case. Here we revisit this problem through the prism of development of message passing methods, and consider not only the universality of the

-transition, as previously addressed, but also the one of the optimal Bayesian reconstruction. We observed that the universality extends to the Bayes-optimal minimum mean-squared (MMSE) error, and to a range of structured matrices.
Life cycle assessment of biodiesel production from crude palm oil: A case study of three Indonesian biodiesel plants
Authors: Wahyono Y , Hadiyanto H 
Published: November 2019

Abstract
This study assessed the life cycle of biodiesel production from crude palm oil at three Indonesian biodiesel plants. The LCA stage is based on ISO 14040, which determines the goal, scope, inventory, impact assessment, and interpretation of the areas under study. However, the main of the research was to compare the carbon footprint biodiesel production processed. Furthermore, the study facilitated and utilized the Greenhouse Gas Protocol V1.02 as a method of life cycle impact assessment, with CO2eq evaluated using fossil fuel, land transformations, and biogenic. The results showed that palm cultivation using crude oil produced the highest pollution source in all categories with the highest at CO2eq. Also, palm cultivation using crude oil production at A, B, and C caused impact categories of 3.2 ton, 3.02 ton, and 2.85-ton fossil CO2eq. These were also extracted from the transportation and production process of crude palm oil in plants that use diesel fuel. Finally, in the production of biodiesel from biodiesel plants A, B, and C, in all categories, the highest impact source of pollution is caused by crude palm oil production.
Community structure of Gastropods in mangrove ecosystem of Pulo Sarok Village, Aceh Singkil Regency, Indonesia
Authors: Octavina C , Defira C N , Ulfah M , Purnawan S , Dwiriansyah R 
Published: November 2019

Abstract
The purpose of this study was to determine the community structure of gastropods in the mangrove ecosystem in Pulo Sarok Village, Singkil District, Aceh Singkil Regency, Indonesia. This research was conducted in April 2018 located in the coastal mangrove ecosystem of Pulo Sarok Village, Singkil District, Aceh Singkil Regency. The purposive random sampling was used in this study. The results showed there were 564 individuals Gastropod in all stations consisted of 4 species of Gastropod, namely Faunus ater as many as 354 individuals, Terebralia palustris as many as 123 individuals, Neritina turrita as many as 58 individuals and Neritina semiconica as many as 29 individuals. The highest density (D) was found at station 3 with a value of 2.44 Individuals per m−2. The diversity (H ') obtained from the three stations ranged from 0.50 to 1.77 which was categorized a the low and medium levels. Evenness index (E) from 0.14 to 0.37 which were in the low category. Furthermore, Domination index (C) of Gastropods range from 0.32 - 0.83. The level of similarity index (IS) ranges from 85.71% - 100%. It is concluded that based on the biological indices the structure of the Gastropods community in the Pulo Sarok Village is at the poor category.
Gill net selectivity, length at first capture and length at first gonad maturity on Hampala macrolepidota (Kuhl & Van Hasselt, 1823) in Ranau Lake, Indonesia
Authors: Makmur S , Arfiati D , Bintoro G , Ekawati A W , Subagdja S 
Published: November 2019

Abstract

Hampala macrolepidota is one of the dominant species was caught in Ranau Lake, (name of city/province). This species has an economic value because its highly demand in the community around the lake. The objective of this study was to know the gill net selectivity, lenght at first capture (Lc) and length at first gonad maturity (Lm) of Hampala macrolepidota, in Ranau Lake. This study was carried out in March to November 2013. Samples of fish were obtained using an experimental fishing in two stations, Banding Agung and Talang Teluk. Fishing gear used two different mesh sizes, 1.5 and 1.75 inches, respectively. For length at first capture and size at first gonad maturity, 1½, 1¾, and 2½ inch-mesh sizes were employed. Results showed that optimum length of fish caught was 16.154 cm and 18.846 cm in 1½ and 1¾ inch mesh size, respectively. The selective size ranged from 9.5-19.6 cm and 12.5-22.1 cm, respectively. Lc/L50% was 15.2 cm, 18.3 cm and 26.8 cm for 1½ 1¾ and 2½ inch mesh size, respectively. Lm was 15.38 cm for males and 19.21 cm for females, respectively. Among fishing gear selectivities, Lc/L50% and Lm had very strong relationship, in which compared with Lm value, female hampala population is very alarming since 1½ and 1¾ inch mesh sizes caught immature gonad females. Good mesh size used was 2½ inch, due to catching post-spawning-sized hampala. Fishing immature fish could cause fish resources extinction.
Determination of iron content within iron sands from Lampanah-Lengah estuary using various analytical methods
Authors: Adlim M , Khaldun I , Rahmi M , Hasanah U , Karina S , Zulkiram Z 
Published: November 2019

Abstract
Lampanah-Lengah iron sand deposit has been analysed by several researchers using XRD, and being reported that it contains hematite and magnetite. The accuracy of iron content data is crucial to analyse due to the economic benefit and environmental consequences. This current study aims to compare the accuracy of several analytical methods to convince the iron content finding. Several methods that were AAS, UV spectrophotometric, gravimetric and redox titration methods were calibrated by determining the iron content of pure iron powder (p.a. Merck) prior to analyse the iron content in Lampanah-Lengah iron sand sample. The accuracy of each method was 99.51; 99.26; 98.82; 96.41% respectively. However the iron contents found in Lampanah-Lengah iron sand sample was significantly different from various analytical methods. The finding were 60.49, 39.58, 34.82, 55.33 and 43.0 wt% detected by AAS, UV spectrophotometric, gravimetric and redox titration methods respectively. It concluded that AAS methods was recorded as the most accurate method for iron content determination in iron sand sample. The iron content is comparable to the common iron content in most samples of iron sand previously reported in several places in Indonesia.
Empowering fisherismen’s wives in diversifying fishery products in Tanjung Medang Village, Bengkalis District, Riau, Indonesia
Authors: Kurnia P , Feliatra F , Lukistyowati I 
Published: November 2019

Abstract
Tanjung Medang is one of villages which have high fishery potency in Rupat utara district. Some of people in this village are fisherment (235 person) of 95 families. Most of fisherment wives do not have additional job beside as hoese wives. To accelarate the economic development of peopole in Desa Tanjung Medang base on local potency is increase knowledge in product diversification of fish products. Method was lecturing and practical work, training, workshop with local people in order to produce qualified and nutrions fish products by appropriate technology, transfering knowledge and instruction to fishermen wives concerning production method in accordance with the standard. Twenty participants of fisherment wives involved were very enthusiasthic and active, 20 participants participated inpreparing all fish product. Discussion between participants and trainers was very intens, mainly, if these was problems in preparing the fish products. It was know that 15 participants had never got such training, two of five participants who had been trained before have fish cracker businiss. Most of the fisherment families eat fish everyday, and only one family have fish three times in a week. Seventeen participants said that the training was very usefull and three participants said it was useful.
Population dynamics of sumbo fish Selar crumenophthalmus (Pisces: Carangidae) in Banda Aceh waters, Aceh, Indonesia
Authors: Perdana A W , Batubara A S , Nur F M , Aprilla R M 
Published: November 2019

Abstract
The stock assessment aims to determine the condition of fish in aquatic environment. In addition, there has been very less research on population dynamics of S. crumenopthalmus, and particular in Aceh has never been done. The aimed of this study is to analyze the population dynamics of the sumbo fish (Selar crumenophthalmus) in Lampulo Fisheries Port, Banda Aceh. The survey has been done from February to April 2019. A total of 164 fish samples were collected. The growth parameters of von Bertalanffy growth function were utilized to analyse the population dynamics of S. crumenophthalmus, using FISAT II (FAO-ICLARM Stock Assessment Tools-II). The results show the population dynamic of infinity length (L∞) as193.2mm, growth coefficient (K) = 4.6 year-1, growth performance index (Ø) = 5.23 year-1, time at which length equals zero (t0) = -0.002 year-1 and optimum fishing length (Lopt) = 158.49mm. In addition, the total mortality rate (Z) was 8.08 year-1 with natural mortality rate (M) = 3.02 year-1, fishing mortality rate (F) = 5.06 year-1, and exploitation rate (E) = 0.63 year-1. Conclusion has been drawn based on E value analysis which reveals that the exploitation rate of sumbo fish has surpassed the sustainable limit.
Ethanolic extracts of Moringa oleifera leaves inhibit biofilm formation of Vibrio alginolyticus in vitro
Authors: Suhartono S , Ismail Y S , Muhayya S R , Husnah M 
Published: November 2019

Abstract
Vibriosis caused by Vibrio alginolyticus infection is getting challenging to treat as the bacteria harbor the ability to form biofilm. One of the natural products that might be potentially applied to treat vibriosis through biofilm deformation is the leaves of Moringa oleifera. The objective of the study was to determine the effect of ethanol extracts of M. oleifera to inhibit V. alginolyticus biofilm formation in vitro. A microtiter plate biofilm assay (OD570nm) method was applied in this study. The treatments were the addition of ethanolic Moringa leaves extracts at different concentrations of 2%, 4%, 8% and 10%. The result of this study showed that Moringa leaves extract significantly inhibited the biofilm formation of V. alginolyticus. The optimal condition to inhibit biofilm formation was at 10% concentration for 60 hours incubation at room temperature signifying the potential application of Moringa leaf extracts to treat biofilmmediated diseases in aquaculture.
Antibacterial resistance Escherichia coli and Aeromonas hydrophila on alkaloid from marine sponge Callyspongia sp.
Authors: Musman M , Kurnianda V , Mauliza A , Winanda A 
Published: November 2019

Abstract
Research on the bioactivity of a compound from Callyspongia sp. as an antibacterial agent against Escherichia coli and Aeromonas hydrophila resistants was conducted. The active metabolite was isolated based on bioassay-guided separation with several steps of chromatography. The FTIR data showed the vibration at 1637.4 cm−1 as C-N imine functional group with the fingerprint region at 1449.0 cm−1 indicated the presence of alkaloid as the active compound. The results of this study informed the inhibitory zone diameter of the extract against E. coli showed an area as wide as 8.10 mm at the concentration of 80 μg mL−1 compared to the inhibitory zone diameter of the positive control Chloramphenicol as wide as 7.50 mm at the concentration of 40 μg mL−1. However, the inhibitory zone of the extract against A. hydrophila displayed an area 8.50 mm in diameter at the concentration of 20 μg mL−1 compared to the zone diameter of the positive control Chloramphenicol as wide as 7.25 mm at the concentration of 40 μg mL−1. Based on the bioassay results, the alkaloid compound from Callyspongia sp. has potential activity against the Gram-positive bacterial resistant of Escheria coli and the Gram-negative bacterial resistant of Aeromonas hydrophila.
A marine isonitrile produced by Indonesian marine sponge of Petrosia sp. as an inhibitor of the human pancreatic cancer cells
Authors: Kurnianda V , Syahliza F , Karina S , Agustina S , Octavina C , Ramadhan M R , Faradilla S B , Ulfah M , Putra D F , Purnawan S , Musman M 
Published: November 2019

Abstract
The study of search the bioactive compound from Indonesian Marine Sponge Petrosia sp. has been conducted on February 2019. The bioactive compound isolated based on bioassay-guided separation with several steps of chromatography. The compound known as C16H25NS determined by lCmS-ESI with molecular weight [M+H]+263.42m/z. The FTIR data showed that the functionality as hydrocarbon skeletone of alkane and isonitrile at 2982.58 cm−1 and 2115 cm−1, respectively. Furthermore, the NMR data confirm that the active compound knowns as 4-amorphene-10- isothiocyanate. The cytotoxic data indicate that the bioactive compound has activity against Panc-1 cell [IC50 = 0.1 μg / mL].The secondary metabolite from Indonesian marine sponge of Petrosia sp. has potential activity against human pancreatic cancer cells.
The inhibitor of human bladder epithelial cancer cells from Indonesian marine sponge of Petrosia sp.
Authors: Kurnianda V , Ramadhan M R , Karina S , Agustina S , Octavina C , Ulfah M , Syahliza F , Faradilla S B , Putra D F , Purnawan S , Musman M 
Published: November 2019

Abstract
The investigation of bioactive compound from Indonesian marine sponge Petrosia sp. has been done on February 2019. The bioactive compound isolated based on bioassay-guide dseparation with several steps of chromatography. The bioactive compound known as C16H25NS determined by LCMS-ESI with molecular weight [M+H] + 263.42 m/z. The FTIR spectrumshowd that the bioactive metabolite has alkane skeleton of hydrocarbonat 2982.58 cm−1andisonitrile functional group at 2115 cm−1. The result of NMR interpretation showed that the bioactive compound know as 4-amorphene with decalin as hydrocarbon skeleton with additional isonitrile moiety. The rate of viability show scytotoxic against NBT-T2 cell.
Antimicrobial agents derived from heterotrophic bacteria againts pathogenic bacteria
Authors: Setiaji J , Feliatra F , Teruna H Y , Lukistyowati I 
Published: November 2019

Abstract
Pathogenic bacteria often cause problems in fish farming. Prevention efforts using synthetic antibiotics may engender negative impacts on the environment. Accordingly, the use of natural antimicrobial compounds is required to minimize the risk. There are several types of heterotrophic bacterias which can produce antimicrobial agents. This study aims to determine the ability of the secondary metabolites extract isolated from heterotrophic bacteria in inhibiting the growth of pathogenic bacteria. The method used in this study was an experimental method. Four isolates of bacterial heterotrophic originating from waters of Sungai Pakning were cultured on nutrient broth for 10 days which would later be extracted by using ethyl acetate. The secondary metabolites extract of the heterotrophic bacteria was tested on 3 pathogenic bacteria that usually attack fish. The antimicrobial test results indicated that the secondary metabolites extract of the heterotrophic bacteria was able to inhibit the growth of Aeromonas salmonicida bacteria from 11.77 to 12.53 mm, Edwarsiella tarda bacteria from 10.70 to 12.40 mm and Edwarsiella ictaluri bacteria from 10.97 to 12.38 mm. Overall, the inhibition of the strongest pathogenic bacteria was JS11 isolates (Bacillus sp. strain SMMA8 code access LN869534.1). Heterotrophic bacteria produced secondary metabolites which can inhibit the growth of pathogenic bacteria in fish. Antimicrobial agents of heterotrophic bacteria are potentially to be developed.
Use of Rhizophora sp. leaf extract for healing motile Aeromonas septicemia disease on catfish (Pangasius hypophthalmus)
Authors: Syawal H , Karnila R , Tang U M , Effendi I 
Published: November 2019

Abstract
Catfish (Pangasius hypophthalmus) is a commercially grown aquatic animal, and A. hydrophila has been described to often cause disease to the Motil Aeromonas Septicemia (MAS) specie. In addition, Rhizophora sp. is a plant reported to contain steroidal compounds, saponins, flavonoids, and tannins, and flavonoid content is widely found in mangrove plants, especially in its fruit, roots, leaves, and outer bark. This study, therefore, aims to examine the uses of Rhizopora sp. leaves extract in the treatment of catfish infected by A. hydrophila, conducted using a completely randomized design (RAL) of one factor (dose of treatment with extract), consisting of four levels; T1 (1300 ppm), T2 (1600 ppm), T3 (1900 ppm), and CT (0 ppm) serving as a control. Moreover, the leaves were sliced, air dried in the room for 10 days, milled, and then macerated with 95% ethanol for 24 hours. This dough was filtered and the residue was further macerated 3 more times, and the resulting filtrate was blended and evaporated to the point at which the gel-shaped extract was obtained. Furthermore, the catfish were injected intramuscularly with 0.1 mL / fish suspension of A. hydrophila bacteria, and the treatment was conducted twice (18 and 42 hours post injection) by soaking in a solution of The leaves for 5 minutes. Parameter measurements (total erythrocytes, hemoglobin levels, hematocrit) values, and graduation of fish life were evaluated at day 0, 3 and 14, post administration and the results showed a decreased in the assessed parameters of the infected fish, when compared to normal ones, which was further elevated close to that shown by the normal, on the 14th day. Post-healing treatment survival rate is observed to be influenced by the concentration administered, and the results were as follows; T1 (33.30 %), T2 (84.60 %), T3 (66.60 %) and CT (0 %).
Identification of marine ecotourism objects on Pulau Jemur, Riau Province, Indonesia
Authors: Effendi I , Elizal E , Jupendri J 
Published: November 2019

Abstract
Marine ecotourism is a form of tourism involving visiting fragments, pristines and relatively undisturbed marine ecosystem areas. Pulau Jemur is a common term for a group of small islands located in the middle of the Malacca Strait, Pasir Limau Kapas District, Rokan Hilir Regency, Riau. This study aimed to identify potential marine ecotourism objects in the area. The research was carried out by recognizing, identifying, observing some marine ecotourism objects on land, in water column, and on the sea floor. Including the beauty, uniqueness and diversity of flora, fauna and other natural phenomenon. It is determined that the potential marine ecotourism objects on the area include; 1) diversity, beauty, and the uniqueness of the species of coastal vegetation. 2) diversity, beauty, and the uniqueness of the animal species on coastal ecosystems 3) some historical objects related to maritime life in the past 4) the beauty and uniqueness of beaches and sea water. 5) diversity, beauty, and the uniqueness of fish species and shallow marine coral reefs. Tourism activities can be in the form of sea sightseeing tour, underwater life boat viewing, snorkeling, diving, swimming, sun bathing, hiking, fishing, joining fishing with fishermen, cooking, eating, etc.
Analysis of histamin content in tuna fish Thunnus sp. with Elisa method at fishing port of Belawan, North Sumatra, Indonesia
Authors: Yusni E , Zai K E S , Zulkifli Z 
Published: November 2019

AbstractTuna migration in Indonesian waters is part of the world tuna migration path because the territory of Indonesia is located on the border crossing between the Indian Ocean and the Pacific Ocean. Histamine is a biogenic amine produced through bacterial decarboxylase from amino acid histidine, and is mostly found in large quantities in fish from the familyScombridae.Histamine production in fish depends on histidine levels in fish, the presence of decarboxylase enzyme-producing bacteria and environmental conditions. The amount of histamine produced by fish is strongly influenced by temperature, time, and storage conditions and species of fish.study This aims to determine the value of Histamine found in Tuna (Thunnusssp) caught by fishermen. This research was conducted in July 2018 - August 2018. Samples were taken from the catches of fishermen in Belawan randomly, then tested at the Fish Quarantine Center in Medan Fisheries Product Quality and Safety Control I. Histamine test results obtained were around 2.45234 - 13. 31231 mg / L. It is concluded that the tuna from Belawan is still save for consumption.
Sedimentation process in Kuala Gigieng Coast, Aceh Besar based on magnetic and gravity surveys
Authors: Surya R A , Abdullah F , Darisma D , Yanis M , Ismail N 
Published: November 2019

Abstract
The study of the sedimentation process in coastal can be used to investigate historical settlements and paleo disaster in the area. We have conducted magnetic and gravity survey to model the sedimentation process in Kuala Gigieng area, Aceh Besar, one of the important harbors during the Aceh Sultanate in 16th. The magnetic and gravity methods are able to map structures based on magnetic susceptibility and density distribution below the surface, respectively. The total magnetic field data were measured by the magnetic method, while the gravity method measured gravitational acceleration data. The data were acquired in an area of 1858 x 725 m2 with stations spacing between 70 -100 meters in grid. The standard magnetic and gravity correction was applied to the data, so that the total magnetic field anomaly and Bouguer anomaly are obtained which reflect the conditions the subsurface. The anomaly map obtained shows the pattern of maximum and minimum values, which the patterns were the same as the topography of the measurement area. To get a clearer sediment model, gravity data has been carried out 2D forward modeling with cross sections cutting from coast to land. The 2D model illustrates the existence of 3 layers in the measurement area, sequentially consisting of alluvial and clay, sandstone, and tuff sandstone sediments. The alluvial deposits in the first layer form a repetitive pattern from the land side to the coast; the pattern was formed by coastal activity. The sequence of sediment layers shows the age of the sediment, with the oldest layers formed far from the coast and the youngest layers formed near the coast.