bluuebunny/crossref_metadata_2025 huggingface dataset:
Research on Multi-level Distribution Strategy Based on Energy Internet
Authors: Wu Fengzhi , Xu Gaofeng , Qi Ziyi , Qi Zhi , Zhang Meng , He Rong
Published: April 2021

Smart city energy Internet is to comply with the trend of sustainable energy development, urban power energy as the center, comprehensive utilization of all kinds of energy, especially renewable energy, to achieve interconnection and common optimization. Based on the background of distribution network in Disney Park, this paper studies the regulation, operation and management strategy of distribution network of smart city energy Internet. This paper describes the characteristics of the energy Internet, and then analyzes the key technologies that affect power grid regulation, operation and management. The paper investigated the distribution network construction in Shanghai Disney Park under the background of urban energy Internet pilot region to understand the allocation of distributed energy in the park grid. Through simulation calculation and analysis, this paper puts forward a distribution network regulation and management scheme suitable for the characteristics of energy Internet. In this paper, the study found that with the rapid development of power grid, especially all kinds of distributed energy access, the new lines are becoming more. In a wide range of power grid structure is becoming more and more complex, in order to ensure the reliability of power supply and power supply quality, scientific regulation under the background of urban energy Internet development mode, enhancing the management level of power grid is the inevitable developing trend of power grid.
Design a project of sewage plant to make the cross-section water quality reach standard
Authors: Chao Lei , Liu Bingtao , Liu Yinzhe , Li Yafeng
Published: April 2021

According to regulations, the cross-section of Wangjiawopeng is regarded as a national control section of the Daling River. The water quality of the section must meet the surface water level III standard. According to the survey, the total phosphorus in the effluent from the sewage plant in Jianchang exceeds the standard is the main reason for the failure of the water quality. In order to make the cross-section water quality reaching standard, it is necessary to carry out the advanced treatment of phosphorus in the sewage plant. (1) The precipitation reaction of phosphorus and coagulant in sewage is strengthened by optimizing the type of coagulant, optimizing the dosage of coagulant, and selecting suitable coagulant aids. (2) The removal efficiency of phosphorus is improved by high-speed fiber filtration technology. (3) Phosphorus is removed by flocculation-sedimentation-high-speed fiber filtration technology. Experiments show that the SS in the sewage plant effluent is less than 5mg/L and filter effluent TP is less than 0.2mg/L. The process construction investment is estimated to be 3.9 million yuan, and the operating electricity cost is estimated to be 0.2 cents/m3. The process has the characteristics of reliable processing technology, stable operation, easy maintenance.
Analysis On The Path And Difficulties Of Chemical Energy Marketization Reform
Authors: Wang Dawei
Published: April 2021

Chemical energy market-oriented reform is a series of important meeting requirements of the central government, which has a very arduous reform task in the context of the information age. In view of this phenomenon, analysis on the path and difficulties of chemical energy marketization reform. The market-oriented reform of chemical energy is the requirement of a series of important meetings of the central government, which has a very arduous reform task in the context of the information age. In view of this phenomenon, the path and difficulties of chemical energy market-oriented reform are analyzed. Build a complex of multiple system subtypes, integrate the price, output, benefit and other indicators of chemical materials to reach a balance point, and meet the different needs of market-oriented reform of different chemical energy enterprises; coordinate the overall reform of the whole industrial chain, including the top-level design of the whole industrial chain reform, the combination of state-owned enterprise reform and chemical industry reform, and the reform of government approval In addition, we should take a comprehensive view of energy and environment, and vigorously develop renewable energy and clean energy. Through the analysis of the difficulties in the market-oriented reform of chemical energy, it is concluded that: at present, the administrative measures for the market-oriented reform of chemical energy in China are temporary but not permanent, most energy enterprises think that the attraction of the proposed policies is low and can not promote the market-oriented reform of chemical energy enterprises; the energy system can not be typified, and it is difficult to classify it as planned economy or market economy based on the atypical characteristics of chemical energy market Market economy increases the difficulty of chemical energy market-oriented reform.
Study on acoustic source characteristics of distributed optical fiber acoustic wave monitoring buried natural gas pipeline leakage
Authors: Wang Chun , Wang Zan , Zhang Jia , Yang Kelong
Published: April 2021

In order to study the leakage of buried natural gas pipeline caused serious environmental pollution and human casualties, the acoustic propagation characteristics of buried natural gas pipeline leakage monitored by distributed optical fiber were studied. At present, the research on the leakage of buried pipeline mainly focuses on the propagation of sound waves along the pipe wall, while the study on the propagation of sound waves in the soil is still lacking. The acoustic attenuation of acoustic wave propagation in soil by the size of leakage hole and leakage pressure is studied, and the evolution process of acoustic wave in soil is revealed. The conclusion is that the acoustic source of buried natural gas pipeline leakage belongs to broadband noise, and the acoustic energy of leakage is prominent in the low frequency band of 15kHz. The lower frequency, the higher sound pressure level. The oscillation of the sound pressure level attenuates with the increase of frequency. Fiber optic monitoring of buried natural gas pipeline leakage early warning provides theoretical support for the conclusion. The sound pressure level in low frequency band is of great significance for buried pipeline leakage monitoring.
Analysis of Guangdong Energy Demand Forecast Based on DIP-REM Model
Authors: Zhang Yuan
Published: April 2021

Computer data mining technology has a positive impact on the accurate prediction of China's energy demand. In order to effectively alleviate the energy crisis that China is currently facing, and further forecast the energy demand, it will provide an active driving force for the sustainable economic development of our country in the future. In this study, the authors studied the current energy use trends in China, and then the authors used the DIP-REM model to predict their future development needs based on a study of the use of energy resources in Guangdong Province. This model can accurately predict the future energy expansion value of Guangdong Province. The research aims to provide a reference for related research on China's energy demand forecast.
Study on hydrogen emission performance of FCEV
Authors: Yuan Xinjian
Published: April 2021

Hydrogen leakage and emission will bring adverse effects to the environment and human health. When it enters a certain concentration range, it will bring the potential explosion. Hydrogen emissions from fuel cell vehicles can be divided into two sources: normal operation of the system and leakage under abnormal circumstances. This paper mainly uses the flowmeter method to measure the hydrogen emission from fuel cell electric vehicle（FCEV）. The different emission characteristics of different types of FCEV under idle and steady cycle conditions were analyzed. The hydrogen emission levels of different types of FCEV under idle and cycle conditions were verified by analyzing and processing the experimental data through a certain amount of hydrogen emission tests of FCEV.
Analysis of Non-Point Source Pollution Features of Chao River Basin Based on the CMADS-Driven SWAT Model
Authors: Min Zhang , Long Yang , Tongyan An , Qing Fan
Published: April 2021

By the China Meteorological Assimilation Driving Datasets for the Soil and Water Assessment Tool (SWAT) model (CMADS 1.0), this paper simulated the non-point source (NPS) pollution of Chao River Basin in the upper reach of Miyun Reservoir, and analyzed the spatial-temporal distribution pattern of nitrogen and phosphorus pollutants and the contribution rates of pollution sources. The major findings of the research are as follows. The CMADS V1.0-driven SWAT model shows good applicability to the study area. The simulation of the runoff, nitrogen and phosphorous pollution in the calibration period and the validation period has yielded a Nash-Sutcliffe efficiency (Ens) coefficient at 0.51~0.78, and a coefficient of determination at 0.73~0.88, which meets the model evaluation standards. The total nitrogen (TN) and total phosphorus (TP) pollution load in the flood season is considerably large, and the average inflow of TN and TP into the reservoir accounts for 60.62% and 75.15% the total annual inflow, respectively. The #26 sub-basin marks the biggest TN and TP loads, and it is thus worth more attention from pollution control administrations. Overall, the TN and TP load in the lower reach of the basin are larger than the upper reach. NPS pollution is the major type of pollution caused by human production and life. The livestock and poultry farming as well as fertilizers, which are the main contributors to NPS pollution, are considered the focus of NPS pollution control.
Monitoring und Steuerung der Flüssigkeitstherapie – wozu und womit?
Authors: Schiewe Robert , Bein Berthold
Published: April 2021

Therapie mit Flüssigkeit ist von großer Bedeutung in Anästhesie und Intensivmedizin. Eine Flüssigkeits- oder Volumentherapie kann, vor allem bei nicht sachgemäßer Durchführung, eine Überwässerung des Patienten zur Folge haben, welche wiederum deletäre Folgen hat. Umgekehrt hat auch eine Hypovolämie unerwünschte Nebenwirkungen. Es ist daher essenziell herauszufinden, ob eine Volumengabe auch eine Steigerung des HZV nach sich ziehen wird (= Volumenreagibilität). Durch verschiedene Monitoring-Verfahren können der Volumenstatus und eine potenzielle Volumenreagibilität evaluiert werden. Es gibt eine Vielzahl an Limitationen, die den Behandlern und Nutzern der Verfahren bekannt sein sollten. Ein Algorithmus kann ein strukturiertes Vorgehen beim Monitoring der Volumentherapie erleichtern.
Synthesis of N2, N6-bis(5-methylthiazol-2-yl)pyridine-2,6-dicarboxamide fluoroscent sensor for detection of Cu2+ and Ni2+ Ions
Authors: Kumar Anuroop , Singh Netrapal , Kumar Mordhwaj , Agarwal Uma
Published: April 2021

This article reports an amide based Chemosensor used for selective detection of divalent Cu+2 and Ni+2 ions via Fluorescence turn off. The selective sensing ability of Chemosensor was investigated in presence of different metal ions Mg2+, Ag+, Fe2+, K+, Cu2+, Ni2+, Hg2+, Pb2+, Mn2+, Pd2+, Cd2+ and Mn3+ as competitive ions. The receptor i. e. Chemosensor formed complexes with metal ions in 1:1 stoichiometric ratio. The detection limit and binding constant calculated as 1.92×10–4 and 1.4×10–4 M and 2.16×103 M−1 and 3.09×103 M−1 for Cu2+ and Ni2+ions respectively. The complexes were characterized by UV/visible, FT-IR, 13C NMR and 1H NMR spectroscopy. Further the structure and Crystallinity were calculated by P-XRD spectral analysis. The crystallinity found to be 65.27 and 67.87% respectively
Prospective analysis of SARS-CoV-2 dissemination to environmental surfaces during endoscopic procedures
Authors: Somerville Carter C. , Shoaib Muhammad , Kuschner Cyrus E. , Brune Zarina , Trindade Arvind J. , Benias Petros C. , Becker Lance B.
Published: April 2021

Background and study aims The COVID-19 pandemic has disrupted routine medical care due to uncertainty regarding the risk of viral spread. One major concern for viral transmission to both patients and providers is performing aerosol-generating procedures such as endoscopy. As such, we performed a prospective study to examine the extent of viral contamination present in the local environment before and after endoscopic procedures on COVID-19 positive patients.

Materials and methods A total of 82 samples were collected from 23 surfaces in the procedure area of four COVID-positive patients undergoing upper endoscopic procedures. Samples were collected both before and after the procedure. severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) RNA was extracted and quantified using reverse transcription quantitative polymerase chain reaction with primers to detect nucleocapsid RNA, and results reported as the number of viral copies per square centimeter of contaminated surface.

Results A total of six positive samples were detected from three of the four patients. The floor beneath the patient bed was the most common site of viral RNA, but RNA was also detected on the ventilator monitor prior to the procedure and the endoscope after the procedure.

Conclusions The risk of SARS-CoV-2 transmission associated with upper endoscopy procedures is low based on the low rate of surface contamination. Some surfaces in close proximity to the patient and endoscopist may pose a higher risk for contamination. Patient positioning and oxygen delivery methods may influence the directionality and extent of viral spread. Our results support the use of appropriate personal protection to minimize risk of viral transmission.
Cemiplimab in der Anwendung bei hochbetagten Patienten
Authors: Dücker P. , Brehmer A. , Nashan D.
Published: April 2021

Wir berichten über den erfolgreichen Einsatz von Cemiplimab bei insgesamt 23 hochbetagten Patienten mit fortgeschrittenen und/oder metastasierten Plattenepithelkarzinomen, die bei guter Verträglichkeit trotz Komorbiditäten nephrogener oder kardialer Genese, Diabetes und auch bei Vorliegen von Zweitmalignomen ein gutes Ansprechen boten.

Eine komplette Remission konnte bei 10 Patienten, eine partielle Remission bei 8 Patienten erreicht werden. 6 der 7 Patienten mit Zweittumoren zeigten ein Ansprechen. Ein Ansprechen zeichnete sich meist schon nach wenigen Therapiezyklen ab.
Fracture liaison service (FLS): Ein strukturiertes Versorgungskonzept für eine optimierte Sekundärprävention von osteoporotischen Frakturen
Authors: Stumpf Ulla , Kraus Moritz , Gosch Markus , Hesse Eric , Kammerlander Christian
Published: April 2021

Osteoporose, eine systemische Skeletterkrankung, ist assoziiert mit einem höheren Lebensalter und betrifft Männer und Frauen. Als Folgen der Osteoporose kann es nach einem inadäquaten Trauma zu Fragilitätsfrakturen kommen. Indexfrakturen sind Frakturen des distalen Unterarmes, des proximalen Humerus, des proximalen Femurs sowie vertebrale Frakturen. Das Risiko, nach einer solchen Fraktur innerhalb eines Jahres eine Folgefraktur zu erleiden, ist deutlich erhöht. Vor allem nach der proximalen Femurfraktur kommt es zu einer Reduktion der Mobilität und Lebensqualität sowie zu einer Erhöhung der Morbidität und Mortalität. Die Bemühungen um eine bessere Versorgung dieser Patienten impliziert eine kontinuierliche Behandlung im Sinne eines Disease-Management-Programms. Die Alterstraumatologie nimmt hier eine zentrale Rolle ein. Neben der operativen Versorgung steht eine interdisziplinäre und interprofessionelle Betreuung im Zentrum. Neben der Behandlung der meist multiplen Komorbiditäten liegt der Fokus auf der Abklärung der Osteoporose sowie der Einleitung einer umfassenden Therapie. Die Lücke zwischen der stationären und ambulanten Versorgung kann durch einen Fracture liaison service (FLS) geschlossen werden. Ein FLS stellt die Basis für ein erfolgreiches Nahtstellenmanagement dar. Damit diese intersektorale Versorgung Bestandteil der Regelversorgung werden kann, wurde das „FLS-Care-Programm“ im Rahmen einer durch den Innovationsfonds der Bundesregierung finanzierten Studie von uns initiiert. Das Ziel ist die Weiterführung der stationär begonnenen Therapie in einer sektorenübergreifenden Zusammenarbeit, um Folgefrakturen zu vermeiden und Lebensqualität zu erhalten.
Analysis of Not Structurable Oncological Study Eligibility Criteria for Improved Patient-Trial Matching
Authors: Dominick Friederike , Dieter Julia , Knurr Alexander , Ahlbrandt Janko , Ückert Frank
Published: April 2021

Background Higher enrolment rates of cancer patients into clinical trials are necessary to increase cancer survival. As a prerequisite, an improved semiautomated matching of patient characteristics with clinical trial eligibility criteria is needed. This is based on the computer interpretability, i.e., structurability of eligibility criteria texts. To increase structurability, the common content, phrasing, and structuring problems of oncological eligibility criteria need to be better understood.

Objectives We aimed to identify oncological eligibility criteria that were not possible to be structured by our manual approach and categorize them by the underlying structuring problem. Our results shall contribute to improved criteria phrasing in the future as a prerequisite for increased structurability.

Methods The inclusion and exclusion criteria of 159 oncological studies from the Clinical Trial Information System of the National Center for Tumor Diseases Heidelberg were manually structured and grouped into content-related subcategories. Criteria identified as not structurable were analyzed further and manually categorized by the underlying structuring problem.

Results The structuring of criteria resulted in 4,742 smallest meaningful components (SMCs) distributed across seven main categories (Diagnosis, Therapy, Laboratory, Study, Findings, Demographics, and Lifestyle, Others). A proportion of 645 SMCs (13.60%) was not possible to be structured due to content- and structure-related issues. Of these, a subset of 415 SMCs (64.34%) was considered not remediable, as supplementary medical knowledge would have been needed or the linkage among the sentence components was too complex. The main category “Diagnosis and Study” contained these two subcategories to the largest parts and thus were the least structurable. In the inclusion criteria, reasons for lacking structurability varied, while missing supplementary medical knowledge was the largest factor within the exclusion criteria.

Conclusion Our results suggest that further improvement of eligibility criterion phrasing only marginally contributes to increased structurability. Instead, physician-based confirmation of the matching results and the exclusion of factors harming the patient or biasing the study is needed.
Geometries and electronic states of iron trimer (Fe3) by CCSD and CCSD(T) calculations
Authors: Nakazawa Tetsuya
Published: April 2021

Geometries and energy separations of various low-lying electronic states of an iron trimer (Fe3) are investigated by coupled-cluster singles and doubles (CCSD) and coupled-cluster singles and doubles plus perturbative triples [CCSD(T)] calculations. The ground state is found to be a 13A′ state with Cs symmetry, whereas a nearly isoenergetic state, 13A1 (C2v), is degenerate to the ground state. The ground and five low-lying states with a spin multiplicity of 13 are found below 0.20 eV at the CCSD(T) level. On the other hand, the low-lying states with spin multiplicities of 9, 11, and 15 appear only above 0.20 eV. From detailed natural bond orbital analyses, Fe3 has Fe–Fe bonds composed of σ-bond orbitals only in theβ-spin part with higher s-character in low-lying states with a spin multiplicity of 13. The polarization coefficients indicate that the σFe–Fe bonds are nearly complete covalent bonds with little polarization.
Growth characteristics, chlorophyll content and nutrients uptake in
Authors: Nkcukankcuka Milile , Jimoh Muhali O. , Griesel Gerhardus , Laubscher Charles P.
Published: April 2021

This study was designed to investigate the growth characteristics, chlorophyll content and nutritional properties of Tetragonia decumbens, an indigenous plant species of the South African Western Cape. One hundred and eight cuttings generated from a mother plant obtained from a garden were cultivated in hydroponic systems over 7 weeks. The hydroponic experiment comprised three nutrient solutions of graded concentrations (0.2, 0.1, and 0.05% w/v) of Nutrifeed fertiliser prepared in the water whereas the control had no nutrients. Soilless treatments were made of 100% silica sand medium heaped in plastic pots near the brim. Each hydroponic system was run for 2 h/week at the pH and electrical conductivities (EC) of 4.5, 5.5, 6.5, and 3.38, 2.34, 1.10 dS/m respectively, whereas frequencies of irrigation were set at 2 L/h for 15 min at an intermittent break of 2 h between 0900 and 1700 hours. For the first time, this study reported macronutrients and micronutrients present in dune spinach. At P < 0.05, post-harvest results showed that fertigation did not affect the macronutrients, however, micronutrients were significantly affected. Therefore, a well-drained soilless media (100% silica) with a high nutrient application (0.2% w/v), low electrical conductivities, and moderate pH levels had better results in vegetative growth and nutritional composition compared with other treatments.
Constraining M
ν with the bispectrum. Part II. The information content of the galaxy bispectrum monopole
Authors: Hahn ChangHoon , Villaescusa-Navarro Francisco
Published: April 2021

Massive neutrinos suppress the growth of structure on small scales
and leave an imprint on large-scale structure that can be measured to
constrain their total mass, M
ν. With standard analyses of two-point
clustering statistics, M
ν constraints are severely limited by parameter
degeneracies. Ref. [1] demonstrated that the bispectrum, the
next higher-order statistic, can break these degeneracies and dramatically
improve constraints on M
ν and other cosmological parameters. In this
paper, we present the constraining power of the redshift-space galaxy
bispectrum monopole, Bg

0. We construct the
Molino suite of 75,000 mock galaxy catalogs from the Quijote N-body simulations using the halo occupation distribution (HOD) model,
which provides a galaxy bias framework well-suited for simulation-based
approaches. Using these mocks, we present Fisher matrix forecasts for
{Ωm, Ωb, h, ns
, σ8, M
ν} and
quantify, for the first time, the information content of the Bg

0
down to nonlinear scales. For k
max = 0.5 h/Mpc, Bg

0 improves constraints
on Ωm, Ωb, h, ns
, σ8, and M
ν by 2.8, 3.1, 3.8, 4.2,
4.2, and 4.6× over the power spectrum, after marginalizing
over HOD parameters. Even with priors from Planck, Bg

0 improves all of
the cosmological constraints by ≳ 2×. In fact, for Pg

0+Pg

2 and
Bg

0 out to k
max = 0.5 h/Mpc with Planck priors, we achieve a
1σ M
ν constraint of 0.048 eV, which is tighter than the current best
cosmological constraint. While effects such as survey geometry and assembly
bias will have an impact, these
constraints are derived for (1 h-1 Gpc)3, a substantially
smaller volume than upcoming surveys. Therefore, we conclude that
the galaxy bispectrum will significantly improve cosmological constraints
for upcoming galaxy surveys — especially for M
ν.
The Exploitation Status of The Slender Grouper (Anyperodon leucogrammicus) in Arafura Sea, Indonesia
Authors: Pane A.R.P. , Suprapto  , Widyastuti H. , Suman A.
Published: April 2021

Arafura Sea is rich in its resources, e.g. shrimp, pelagic fish, demersal fish, and coral reef fish. Coral reef fish commonly found in Arafura waters are among others brown-marbled grouper, slender grouper, leopard coral grouper, humpback grouper, etc. One of the groupers that has a higher selling price than the other groupers is slender grouper (Anyperodon leucogrammicus). The high demand for the fish is in line with the increase in the catch and the exploitation status. Therefore, a study is necessary to analyze the exploitation status of the slender grouper in Arafura Sea. This study was carried out from March to November 2017 by sampling the grouper at its landing site in Dobo, Aru Islands, from the fishing grounds in Arafura Sea, Maluku. The size of the slender grouper was 15–120 cmTL, and its growth pattern was allometric negative. Its growth rate (K) was 0.34 per year and its fishing mortality (F) was higher than the natural mortality (M). The exploitation rate (E) of the fish was 0.52%, meaning the fish was already moderately exploited. Therefore, precautionary managements are necessary to maintain the sustainability of the slender grouper resources in Arafura Sea.
Water Quality Analysis Based on Plankton Community Structure in Kampar River, Riau Province
Authors: Asiah N , Sukendi S , Harjoyudanto Y , Junianto J , Yustiati A
Published: April 2021

It is suspected that there has been pollution in the Kampar River as a result of land conversion. To determine the quality of Kampar River water, one of the parameters that can be used is a biological indicator, namely plankton. The research was conducted in July 2017 - July 2018 with the purposive sampling method at 3 observation stations. Plankton samples were analyzed using the Diversity Index (H ′), Dominance (C), and Uniformity (E). From the results, it is known there are 13 types of plankton consisting of 2 classes: Bacillariophyceae (5 types) and Chlorophyceae (8 types). Abundance ranges from 7250-11500 cells/L with the genus Scenedesmus sp. has the greatest abundance. The diversity index value is included in the low to the medium category (1.9306-2.4574). The population dominance obtained from all stations is in a low category (<0.4). The population uniformity of the three stations shows a value that falls into the high category (>0.6), so it can be said that the uniformity of the plankton population in the Kampar River is high. From these results, it can be concluded that the Kampar River water body in this study belongs to the polluted category. This is also supported by the findings of the genus Synedra sp. at Station 2. This genus can live in a low DO condition and serve as an indicator of pollution. Although the abundance is low, the presence of this genus indicates that this area has experienced a decrease in water quality or pollution.
Littoraria spp. Snail (Mollusca: Gastropoda) as a Bioindicator in The Mangrove Ecosystem
Authors: Syahrial  , Desrita  , Ezraneti R.
Published: April 2021

Coastal environmental damage often occurs in various regions, especially around the mangrove forest area. Generally caused by anthropogenic which is increasingly high and causes mangrove habitat to change and gives great pressure on the biological community that inhabits it. One of the main objectives of bioindicators is to identify species or groups of species that can indicate environmental disturbances, so this study aims to determine or assess how suitable species or groups of Littoraria species as bioindicators in monitoring programs in coastal environments, especially mangrove ecosystems. The results of the study concluded that Littoraria spp. can be used as a species or group of bioindicator species. This is because they have fulfilled the requirements that must be fulfilled by an organism to be used in the biomonitoring program. However, the criteria for Littoraria’s spp. relationship with other species is still unclear, so they must be used with caution.
Yellowfin Tuna Fishing Dynamic During Low IOD Positive and Negative at Eastern Indian Ocean; Study Case at Western Waters of Sumatera
Authors: Nurholis  , Sukoraharjo S S , Lumban-Gaol J , Syah A F
Published: April 2021

Effect of Indian Ocean Dipole (IOD) was highly significant on term of environments parameter variabilities at the Indian Ocean. Variation in the abundance and distribution of yellowfin tuna have been well known associated with environment parameters that drive by large-scale climatic indices such us Indian Ocean Dipole. To better understanding on yellowfin tuna fishing activities at the Western waters of Sumatera, we investigated hand line fishing catch during 2016 and 2017 as the IOD negative and positive events representation. Our result showed significant different fishing variabilities between year with negative and positive indices. Mean annual yellowfin tuna catch significantly higher during positive IOD both of abundance and weight, following by mean annual catch per unit effort (CPUE). During positive IOD hand line fishing trips were significantly lower compare than negative IOD. We also evaluated the geographic distribution of hand line fishing activities, we found that fishing activities cover significant wider area during positive IOD. In the opposite, during negative IOD yellowfin tuna fishing activities became centralized. This study gave us new perception on large-scale climatic events effect on yellowfin tuna fishing activities at a narrow study area.
Toxicity of Alkyl Sulfate Surfactant Detergent (AS) to Larvae of Vannamei Shrimp (Litopenaeus vannamei) From Marine Waters, District of Lingga Timur, Lingga Regency
Authors: Eddiwan  , Sukendi  , Siregar Y. I. , Saam Z.
Published: April 2021

The coastal area of East Lingga Subdistrict, Lingga Regency has been designated by the Lingga Regency government as the center for the development of shrimp pond cultivation. This study aims to determine the level of toxicity of the surfactant alkyl sulfate (AS) detergent to post larvae (PL) of Vannamei shrimp (Litopenaeus vannamei). An acute test was performed on PL10 samples exposed to AS media for 96 hours. Then the Median Lethal Concentration (LC50) value was calculated for 4 times (24 hours, 48 hours, 72 hours, and 96 hours). Furthermore, the PL-15 sample was AS in the sub chronic test, then the sample was exposed to AS media for 24 hours, then the growth rate and changes in the gill organ structure of the PL samples were observed. From the test results, it is known that the LC50 values in the AS test for the 24th, 48th, 72th, and 96th times of the shrimp larvae samples obtained LS50 values were 33.6 mg/l, 29.4 mg/l, respectively. 24.3 mg/l, and 22.8 mg/l. Subsequently, an increase in AS concentration by 17.11 mg/l in the rearing medium resulted in a decrease in the growth rate of post larvae. The acute and sub chronic testing period showed changes in the behavior of post-larvae samples. The histopathological observations found damage to the structure of the sample gill organs and hepatopancreas. Symptoms of damage to the structure of the gills began to appear at AS concentrations of 25.58 mg/l at time 96 and 72 with an LC50 value of 34.99 mg/l. Furthermore, it was also seen at an AS concentration of 9.78 mg/l at time 24. The results of this study found that AS toxicity to Vannamei larvae increased with increasing concentration and exposure time.
Betta Fish Farming Information System Based on Android Applications
Authors: Hendrizal A , Lesmana I , Wibowo M A , Fauzi M , Budijono
Published: April 2021

The challenge in developing an ornamental fish culture in Indonesia is the lack of a trusted source of information that can be used by the wider community. This lack of information became the reason for the failure of ornamental fish culture, including betta fish. This study aims to design an Android-based betta-fish culture information system that can be used by the wider community. The method used in this study is a mixed-method, through the development of an android application to gather information about betta fish farming. Data collection related to biology aspect and factors that influence betta fish culture is done through secondary data collection. All information collected will be entered into an android-based information system. Android applications will be developed using the Java programming language by using the android studio as the official integrated development environment (IDE) for Android application development. The results of the Android-based betta-fish culture information system design will be displayed on the main menu form consisting of betta fish potential, cultivation (details of cultivation and their needs), list of betta fish varieties, and betta fish trading. This application is expected to help the community to access information on betta fish culture to be more productive and efficient. Android based betta fish information system will help ornamental fish breeder to get information needed for success breeding.
Assessment of Surface Push Net (Sondong) as Eco Friendly Fishing Gear
Authors: Brown A. , Isnaniah  , Bustari  , Rengi P. , Syofyan S.
Published: April 2021

Sondong is a type of push net fishing gear that is operated in the water surface. This gear captured one type of fish only namely Stolephorus sp. To understand the eco-friendly level of this gear, a study has been conducted in August 2018 in the Akar Strait Village, Meranti Regency, Riau Province. To check the eco-friendliness of this gear, the characteristics of this gear is compared to five [1] namely the selectivity level; do not cause habitat damage; high quality fish produced; low bycatch and discard and do not harm the protected fish species. This study was conducted through direct observation in the field and interviewing the fishermen. Technical, environmental and financial data were descriptively analyzed. Based on data obtained, it can be concluded the surface push net is a very environmental friendly gear as it perfectly meets all five basic ecofriendly criteria. In financial term, the use of this gear might be continued because it provides benefits for fishermen as well as quickly return the business capital.
Food and Nutrition Security in The Context of COVID-19 and The Potential Role of Tilapia Aquaculture
Authors: Bhujel R C , Suharman I
Published: April 2021

Millions of people lost their jobs due to COVID-19 creating critical problems of food and nutrition insecurity. It has added 130 million in addition to 821 million hungry people [1]. Over 690 million people are malnourished. Fish is the best medicine of malnutrition and the most efficient food production system; tilapia is the most suitable one. It became the most widely farmed species due to availability of inputs, equipment, technologies and human resources. To solve the shortages of seed, AIT developed a technique capable of producing millions of mono-sex seed. It is spreading from Fiji through Asia, Africa to Brazil. Tilapia is grown in low input ponds to highly intensified cages and tank systems. China produces over 1.5 million ton annually, followed by Indonesia and Egypt. Globally about 7 million mt of Nile tilapia along with its hybrids, is produced annually which is the highest amongst the species. Tilapia is available in the street as well as supermarkets in Asia and frozen fillets are popular in USA and Europe. It has great scope to create millions of jobs and generate income in addition to ensuring food and nutrition security if it could be aggressively promoted worldwide.
Development of Marine Ecotourism in Indonesia: Case of Maligi Nature Reserve, Province of West Sumatra
Authors: Zamzami L. , Azwar  , Ermayanti  , Hendrawati
Published: April 2021

Arafura Sea is rich in its resources, e.g. shrimp, pelagic fish, demersal fish, and coral reef fish. Coral reef fish commonly found in Arafura waters are among others brown-marbled grouper, slender grouper, leopard coral grouper, humpback grouper, etc. One of the groupers that has a higher selling price than the other groupers is slender grouper (Anyperodon leucogrammicus). The high demand for the fish is in line with the increase in the catch and the exploitation status. Therefore, a study is necessary to analyze the exploitation status of the slender grouper in Arafura Sea. This study was carried out from March to November 2017 by sampling the grouper at its landing site in Dobo, Aru Islands, from the fishing grounds in Arafura Sea, Maluku. The size of the slender grouper was 15–120 cm TL, and its growth pattern was allometric negative. Its growth rate (K) was 0.34 per year and its fishing mortality (F) was higher than the natural mortality (M). The exploitation rate (E) of the fish was 0.52%, meaning the fish was already moderately exploited. Therefore, precautionary managements are necessary to maintain the sustainability of the slender grouper resources in Arafura Sea.
An Analytical Study on the Fishing Communities Adaptation to the Impact of the COVID-19 Pandemic in Sungai Apit District
Authors: Darwis  , Ramadona T , Septya F , Nugroho F , Metalisa R , Rengi P , Ngesti S M
Published: April 2021

This study aimed to analyze the adaptation patterns of fishing communities in dealing with the impact of COVID-19 pandemic in Sungai Apit District. The methods used in this study include a survey method, observations and interviews with fishing communities at the research location. This research is based on qualitative and quantitative approaches by adopting a multi-criteria analysis. The analysis of the form of adaptation was carried out using three indicators, i.e., health, economic, and socio-cultural variables. This study found that the adaptation patterns of the fishing communities are adopting healthy lifestyles, which is in the first rank with a score of 0.223, followed by restrictions on gathering activities in the second rank with a score of 0.168, and not participating in community activities in the third rank with a score of 0.121.
Household Perception of Urban Farming for Environmental Coastal Area HouseholdB (Case Study District Gresik)
Authors: Purba S. , Amir I. T.
Published: April 2021

This study discusses the perception of households in urban farming for environmental sustainability coastal area household, especially coastal area in the District Gresik. This type of research is descriptive sources. The rate of urban population growth will cause environmental problems, ranging from land conversion to the environmental degradation caused by pollution and trash. This happens especially to the district of Gresik, because getting into residential and industrial areas. Urban farming is an activity utilizing the open spaces which are not as productive as empty land in urban areas into productive plantations through alternative activities by the people of the city to improve the quality and quantity of open space in big cities. This effort is expected to help solve the problem of improving environmental (ecological), improving the aesthetics of the narrow land or an empty area, and to improve the economic and sociological value for society. Gresik has Urban Farming area, the area of the source of agricultural and food diversity is quite high. Some important commodity support food availability and consumption are emerging in here, for example for food crops. In this research, the sample collection method using Proportionate stratified random sampling method as many as 30 people who used to answer this research. In this study are households residing in urban farming locations exactly in coastal area in the Sub-district Gresik and District Gresik. The public perception of urban farming in the district of Gresik and Kebomas the vast majority of households agreed that urban farming is able to cope with environmental problems and sustainable development that can be developed by local governments. Public perception of the use of urban farming on the surrounding environment and the District of Gresik most coastal area households also agreed on the function and benefits of urban farming. Households’ perception of the appropriateness of urban farming households largely agreed on the prevention, alleviation and cessation efforts. Household perceptions of the characteristics of urban farming area in accordance with the vast majority of households agreed.
The Relationship of Fish Farmer Characteristics and Communication Network in Aquaculture Bussiness at The Village of Indonesia
Authors: Zulkarnain  , Lubis D. P. , Satria A. , Hubeis M.
Published: April 2021

Communication network is an indicator of interaction between one person to another person or a society to another society. To see the form of interaction happened, a research had done about the correlation between fish farmers’ characteristics and communication network in aquaculture bussiness at Koto Masjid village Kampar Regency, Riau Province, Indonesia. This research was done using survey method. The respondents were chosen from the members of partnership program by PT Telkom as many as 90 respondents. The result of the study showed that there is a significant correlation between fish farmers’ characteristics and communication network in aquaculture bussiness. The relationship in this research states that in the interaction among fish farmers in running aquaculture bussiness is affected by fish farmers’ individual characteristics, these matters make them comfortable to communicate to fulfill their needs in running aquaculture bussiness
The Addition of Superior Hetrotrophic Bacteria in Increasing The Growth of Saline Tilapia (Oreochrommis Niloticus)
Authors: Feliatra F. , Batubara U. M. , Lukistyowaty I. , Emelson T.
Published: April 2021

Aquaculture is one of the important types of economic businesses in Indonesia, this can be seen from the many people’s livelihood depend on aquaculture sector. This study aims to analyse the addition of superior heterotrophic bacteria to the growth of saline tilapia. The method used experimental method with a Completely Randomized Design (CRD) where four levels of treatment are carried out. The treatment given is the addition of feed. T0: Without the addition of heterotrophic bacteria. T1: Addition of heterotrophic bacteria isolates J. T2: Addition of heterotrophic bacteria isolates N. T3: Addition of heterotrophic bacteria combined isolates B, C, D, J, H, N.. The results showed that the highest absolute weight growth rate was found in treatment 3 or P3 of 6.09 g, followed by treatment 2 of 4.48 g, treatment 1 of 3.24 g, and the smallest in treatment 0 of 1.86 g. Graduation rate of fish life during the study was not influenced by the addition of heterotrophic bacterial isolates. The number of heterotrophic bacteria and water quality parameters were not significantly different from the addition of heterotrophic bacterial isolates. The addition of superior heterotrophic bacteria can increase the growth of Saline tilapia.
Screening of Antioxidant and Anti-Acne Activities in 16 Sea Cucumber in Indonesia
Authors: Ardiansyah A. , Nugroho A. , Rasyid A. , Putra M.Y.
Published: April 2021

Sea cucumbers are marine organism that have interesting biological activities and generally used for food, cosmetics, and medicine. The use of sea cucumbers in cosmetics due to sea cucumbers have good antioxidant and antibacterial activity. There have not been many studies on sea cucumbers in Indonesia that show sea cucumbers as antibacterial (especially bacteria that cause acne. This study was conducted on sixteen species of sea cucumber from genus Actinopyga, Bohadscia, Holothuria, Pseudocolochirus, and Stichopus to select sea cucumber species that have the best activity in counteracting free radicals (antioxidant) and inhibits acne bacterial growth (anti-acne activities) on Propionibacterium acnes, Staphylococcus epidermidis, and Staphylococcus aureus. Antioxidant test is carried out using DPPH (2,2-diphenyl-1-picrylhydrazil) method while antibacterial test uses Plate Bioassay method with resazurin indicator. Test results on the sixteen samples of methanol extract of sea cucumber species showed that H. leucospilota was the species with the highest antioxidant activity with an IC50 value of 9.66 ± 0.15 mg.mL-1 and with an inhibition of 53.09 ± 1.20 % at a concentration of 10 mg.mL-1. Five species of sea cucumbers that have antibacterial activity in the three bacteria tested were Holothuria impatiens, Holothuria scabra, Pseudocolochirus sp., Stichopus vastus, and Holothuria atra.
Evaluation of Nutritional Value and Quality of Toddler Biscuits During Storage
Authors: Ilza M. , Karnila R.
Published: April 2021

The purpose of the study was to evaluate the nutritional value and quality biscuits during storage that meet the standards of omega 3 and omega 6. A combination of fish oil used in the manufacture of biscuits to meet the standards of omega 3 and omega 6. Fish oil derived from belly fat of Siamese jambal (Pangasius hypophtalmus) and grouper (Cromileptes sp). Next biscuits packed with plastic (HDPE), aluminum foil, and combinations of HDPE with aluminum foil, and stored during the 0 - 60 days. Evaluation of the nutrition value and quality once 15 days by checking the nutritional value (moisture, protein, fat, and ash), quality (peroxide value), omega 3 and omega 6 value. Based on the analysis of variant that long storage and packaging types affect the moisture and protein content. The long storage affect the fat content and the type of packaging does not affect the fat content. More the long storage and packaging types does not affect the levels of ash. The best type of packaging is aluminum foil. Based on the regression equation (Y = 0.0083x + 0.068) between the long storage with peroxide at HDPE packaging known period has expired biscuits 116 days with r = 0.90. Regression equations (Y = 0.0079x+ 0.0079) between the long storage with peroxide at aluminum foil packaging known period has expired biscuits 132 days with r = 0.89, and based on the regression equation (Y = 0.0081x + 0.066) between the long storage with peroxide on combination HDPE and aluminum foil packaging known period has expired biscuits 116 days with r = 0.89. The study results conclude is best packaging aluminum foil with period has expired biscuits 132 days. Based on the analysis omega 3 and omega 6 ratio contained in biscuits 1:4.5 during storage 60 days with aluminium foil, means the resulting biscuit has fulfilled the standard of omega 3 and omega 6 (above WHO standards).
Sargassum polycystum Decoct Improves Hyperglycemic Symptoms on The Type 2 Diabetic
Authors: Firdaus M.
Published: April 2021

Sargassum polycystum is one type of brown algae that contains many bioactive compounds, including polyphenols. This compound is known to be anti-hyperglycemic that beneficial for the control of blood glucose and diabetic symptoms in diabetics. Symptoms caused by hyperglycemia are weight loss, polyphagia, polyuria, and polydipsia. Polyphenols are compounds that dissolve quickly and are easily obtained by decoction. The purpose of this study was to examine S. polycystum decoct for improvement in diabetes symptom in type 2 diabetes mellitus rats. This study was carried out at the Laboratory for Physiology and Biomedicine on the Medical Faculty of the Universitas Brawijaya. This study consisted of 7 treatments: negative control, negative control + metformin, diabetes control, diabetes + metformin, diabetic rats + 0.5 mL of decoct, diabetic rats + 1 mL of decoct, and diabetic rats + 1.5 mL of decoct, respectively. Blood glucose and diabetes symptom were observed at the end of the study. The results showed that the diabetic rat group suffered from hyperglycemia and diabetes symptoms. Treatment of S. polycystum decocts on type 2 diabetes mellitus rats decreased blood sugar levels and improved diabetes symptom. However, the results were not as optimal as in diabetic animals treated with metformin. The conclusion is that S. polycystum decoct can reduce hyperglycemia and diabetes symptoms in rats with type 2 diabetes mellitus.