bluuebunny/crossref_metadata_2025 huggingface dataset:
A novel single-ended fault location method for long-distance HVDC transmission lines based on cross-correlation analysis
Authors: Shi Lei , Guo Ningming , Qi Jincheng , Liu Ruopeng , Mao Chunxiang
Published: February 2020

The transmission line, as the faultiest device in power system, cross many complex areas which will cause worse work condition. This is, both the rate of faulty and the difficulty of the manual fault location are raised. While accurate fault location method could reduce the workload and outage cost, increase the speed of repairing and improve both the reliability and economics of power system. Therefore, it is essential for HVDC systems which have much longer transmission lines. The existing fault location device of HVDC transmission lines are based on the principle of transient travelling-wave. However, due to the interference caused by on-off of power electronic devices and signal resonances, the single-ended travelling-wave method can not be applied in HVDC. The characteristics of clutter interferences of HVDC system and the coupling between double pole lines are analyzed in paper. A novel single-ended travelling-wave fault location method for HVDC transmission lines based on the correlation between two pole lines is proposed. The signal of the non-fault pole line is applied as reference signal; the method suppresses interference through the cross-correlation calculation between the fault and the no-fault pole line. So the reflected wave is enhanced and the identification reliability of the reflected wave is improved. The validity of the method is verified by simulation and on-site data analysis.
Distribution terminal automatic test system based on portable solution
Authors: Weichen Liang , Bo Liu , Junna Liu , Xuan Li , Lin Xiao
Published: February 2020

Distribution terminals have been widely and maturely applied in China currently. However, due to the large number of manufacturers, the differences in production technology, research and development technology lead to inevitable differences in the quality stability of distribution terminals. At the same time, it is also necessary to locate the faults of distribution terminals that are operating online and have faults. The traditional manual test method is difficult to meet the requirements of test specifications. It is also necessary to consider the requirements for testing batch operations and multi-scene applications. Based on the background, this paper proposes a distribution terminal automatic test system based on portable solution, which can complete the automatic test for distribution terminal in multiple scenarios.
Research on restraining low voltage of distribution power network using STATCOM
Authors: Qingren Jin , Ke Zhou , Mei Guo , Yangjun Zhou
Published: February 2020

In order to solve the problem of low voltage in distribution power network, this paper proposes a novel static synchronous compensator (STATCOM) based on modular multilevel converter. When the bus voltage of distribution power network changes rapidly, The MMC-STATCOM can quickly provide reactive voltage support and maintain the stability of bus voltage. Firstly, this paper introduces the operating principle of the MMC-STATCOM, and then propose three-level control strategies including device-level-, converter-level- and system level-control. Finally, based on the data of a power station in the distribution network, Simulation is carried out in the power system analysis and synthesis program (PSASP). The simulation results show that the MMC-STATCOM control function is reasonable and can respond quickly to the system reactive power change. It can effectively realize the voltage support and ensure the safe and stable operation of the power network.
Energy storage locating and sizing method in grid-connected micro-grid
Authors: Furan Guo , Wenzhuo Song , Fanbin Meng , Qingfeng Zhang , Yao Gao
Published: February 2020

In micro grid, the distributed generations have a large proportion and the energy storage system is the fundamental structure of the micro grid. Wind and photovoltaic power generation contain intermittent and uncertain characteristics. Energy storage system in micro grid can smooth the volatility of distributed power and supply power to important loads in case of the insufficiency of distributed power generation. In this paper, a location and capacity planning method of energy storage system is proposed. The energy storage installation points are the key points of the system, which are identified based on the electrical distance. Further, the capacity is optimized and solved on these basics. Finally, the effectiveness of the proposed method is verified through case studies.
The development of a high efficiency microturbine generator for a vehicle
Authors: Iakunin R , Kostyukov A , Kozlov A , Nadareyshvili G , Terenchenko A
Published: February 2020

Currently, microturbines are becoming increasingly common in power generation. There is a desire to use them as an energy source for the hybrid cars with the wheels driven by an electric motor. However, stationary microturbines are not well adapted for use on the automobiles. The main differences are frequent engine stops and lack of space for large heat exchangers. These differences lead to a decrease in the engine efficiency. The article discusses the technical solutions for the design of microturbines with high efficiency, small size of the heat exchanger and the bearings with reduced friction losses. The calculation studies have shown a possibility of achieving high efficiency for microturbines in a car. Currently, tests of real engine components to confirm the calculations have ended. Based on the test data, a microturbine is being designed. This microturbine will have been made by the end of this year.
Effect of tangential absolute velocity at outlet on open flume turbine performance
Authors: Nasution Sanjaya BS , Adanta Dendy , Warjito  , Budiarso
Published: February 2020

To address the electricity crisis in Indonesia, the use of open flume pico hydro turbines is a potential solution because Indonesia has 19 GW of hydropower resources at mini, medium, and pico scales. There are two concepts for the design of an open flume pico hydro turbine runner: Euler and Nechleba. Euler’s concept recommends that the absolute tangential velocity at the outlet of the blade be zero to optimise power absorption. By contrast, Nechleba explains that to reduce flow separation at the outlet of the blade (separation can reduce efficiency), tangential absolute velocity at the outlet of the blade must not be zero. Accordingly, this study compares the performance of blades designed with these two concepts using a computational fluid dynamics method. The results showed that the maximum efficiency of the blade using the Euler concept was 70.08%, while the blade using the Nechleba concept was 74.39%. Based on the results, a runner design concept that assumes a non-zero tangential absolute velocity at the outlet of the blade is recommended for use in designing an open flume pico hydro turbine runner.
Improved method on hydraulic power calculations for conventional sucker rod pumping system
Authors: Mwangupili O E , Chunsheng P , Bululu C , Nyanswi S L , Muya S M
Published: February 2020

The annual energy consumption of suck rod pumping units in China is more than 10 billion kWh, but the average efficiency is only about 25-31%. Limited information is known, about the efficiency of various components of the pumping unit. The current methods for calculating the hydraulic power neglect the effect of friction and free gas. This research introduces an improved method for calculating hydraulic power which takes into account the effect of friction and free gas. The model was obtained from the product of two parameters which were, predicted pressure increased by the downhole pump and predicted flow rate. The pressure increased by the pump was obtained by the nodal analysis approach in which the concepts of multiphase flow were included. The Computer program was developed and all calculations in this paper were computed by this program developed from python programming language version 3.5. This model was compared with the previous models and showed that, the previous models underestimated the hydraulic power since the influence of gas and friction were not included.
Research on non-intrusive monitoring of large power data industrial users
Authors: Li Wenfeng , Bai Hongkun , Wu Bo , Bu Feifei , Hua Yuanpeng , Lu Hao , Yang Yongchun
Published: February 2020

This paper constructs a non-intrusive monitoring method based on wavelet packet decomposition and fast Fourier decomposition technology to monitor the key production processes of high-energy-consuming and high-pollution industrial enterprises by utilizing the large data of power consumption of key industrial users such as iron and steel. Taking a steel plant in Henan as an example, using the constructed non-intrusive monitoring method, the load curve of the main production process is decomposed to achieve effective monitoring of the main processes of iron making, steel making and steel rolling. At the same time, through the typical link power capacity measurement, the company’s steel production capacity is obtained, which can provide technical support for the supervision of key industrial users such as steel.
Study on stability feature extraction of power system using deep learning
Authors: Shi D Y , Lv Y , Yu Z H , Lu G M , Dai H Y , Xie M , Zhang L L
Published: February 2020

Dynamic security assessment (DSA) of power grids is widely used in dispatching operation systems, and calculation speed is one of its most important performance indicators. In this paper, a stability feature extraction method is proposed, which is useful for quick judgment of stability and assisted decision-making. Firstly, a simulation sample database is constructed based on historical online data and a deep learning model with least absolute shrinkage and selection operator (LASSO) is trained to pick both the high level and low level stability features. While a new operation mode needs to be evaluated, a fast search is implemented to obtain the most similar samples in the database using the chosen high level features; the final result will be determined comprehensively by the familiar samples. If the power grid is in critical condition, a decision-making will be done by using the low level features. The validity of proposed method is verified by the simulation using online data of Northeast Power Grid of China. It is proved that the method meets the requirements for speed and accuracy of online analysis system.
Dynamic reactive power optimization method based on the transformer dummy node model
Authors: Wang Aifeng , Wei Hua
Published: February 2020

This paper proposes a dynamic reactive power optimization method based on the transformer dummy node model. Compared to the method based on the traditional equivalent n circuit, the proposed method adds the voltage at the dummy node as a variable, together with the voltage at the other side of the transformer, to express the voltage change on the two sides of the transformer. So the turn ratio of transformer is removed from variables, and the power flow equations of transformer branches do not contain turn ratio and its square, both the dimension of power flow equations and the number of non-zero elements in the Jacobian and Hessian matrix reduce, which decreases the calculative amount and accelerates the solution process. The test results of IEEE4, 14, 30 bus systems show that the proposed method obtains the same optimal solution with the traditional method but converges more quickly. With higher computational efficiency, the proposed method is suitable for the practical application of power systems.
Analysis of average-closing-speed for medium-vacuum circuit breaker from theoretical calculation aspects
Authors: Sun Lijie , Peng Yanqing , Liu Yong , Wang Gang , Sun Xibao
Published: February 2020

Average closing speed is an important indicator for evaluating the performance of CB, in order to calculate the average closing speed of the spring operating mechanism of the medium voltage vacuum circuit breaker, the paper establishes a simplified model of CB mechanism, combined with the kinetic energy theorem, and obtains the average closing speed by analyzing the equivalent mass and energy of the mechanism. In order to verify the correctness of the proposed method, the paper establishes a CB simulation model to obtain the simulated average closing speed. In the calculation of the energy of the open-off phase, the paper adopts a segmentation calculation method, which divides the closing process into the open-distance phase and the over-travel phase, and the calculated average closing speed is more accurate. This theoretical calculation method provides a theoretical basis for the research and development of the medium-voltage vacuum CB spring operating mechanism, and plays a positive role in related research and development work.
Wavelet-based baseline correction optimization algorithm for SF6 spectral signal
Authors: Wenfeng Liu , Yanting Wang , Liang Liu , Mingshu Yao , Xiaofeng Xu , Jing Gao , Liang Wang
Published: February 2020

SF6 gas is widely used in various power equipment. In this paper, a baseline correction algorithm based on spectral detection method based on optimal wavelet basis is proposed. The algorithm selects the optimal wavelet base, removes the strong spectrum information by threshold method, eliminates the influence of continuum fitting, and performs the least squares fitting on the residual signal to obtain the continuum, and removes the continuum from the original spectrum to obtain the required Line spectrum. The accuracy of the quantitative analysis of the line spectrum intensity after processing is greatly improved, and the baseline is effectively estimated and corrected, and the fitting accuracy is higher than the traditional iterative wavelet baseline correction algorithm.
Energy self-sufficient sensor node for long range wireless networks
Authors: Bolte P , Witkowski U
Published: February 2020

Wireless networks can have different architectures depending on the application context. In this paper, we concentrate on a wireless network that supports a gateway to a server being accessible from the internet. Many typical related applications can be found in IoT and Industry 4.0. Focus of this paper is on the design of a sensor node that is energy self-sufficient and supports the LoRa communication standard. By using LoRa long range wireless communication of up to several kilometres range becomes possible. Therefore, large areas can be covered by using multiple sensor nodes. Special attention had been on low-power design aspects to run the node with rechargeable battery and small photovoltaic cell only. Example application is ambient monitoring and support of an aquaponics project.
Utilization of agar Gracilaria sp. as a natural thickener on liquid bath soap formulation
Authors: Dita L R , Sudarno  , Triastuti J
Published: February 2020

Agar Gracilaria sp. is potential seaweed in Indonesia with largely opportunity to be used as raw material for cosmetics, especially skincare creams, lotions, powder, lipstick, facial makeup, and soap. Liquid bath soap is one of the cosmetics that require thickener in the composition, which often generally uses carcinogenic cocamide DEA. On the other hand, agar Gracilaria sp. has a gelling agent capable of having a thickening effect on certain products such as liquid bath soap. This study aimed to determine the potential of agar Gracilaria sp. as a thickener agent in liquid bath soap as a cocamide DEA substitute. This study used agar Gracilaria sp. with a percentage of 0, 1, 2% and 1% cocamide DEA. Parameters determined were the viscosity, pH, specific gravity, microbial contamination, and organoleptic. Data were analyzed using analysis of variance (ANOVA) and Duncan test, while organoleptic data analysis used the Kruskal Wallis test. The study results showed that the addition of 1% Gracilaria sp. agar had 762.22 cPs viscosity, pH 9.06, 1.05 g/ml specific gravity, and <1x101 colonies/ml microbial contamination.
Correlation Between Glucose Level And Protozoan Ectoparasite Infestation Level Of Humpback Grouper (Cromileptes altivelis) Nursery In UPBL Situbondo, East Java
Authors: Mahasri G , Yodharta I N D , Novalisa D , Mukti A T
Published: February 2020

The purpose of this study was to determine the correlation between blood glucose levels of humpback grouper with an infestation of protozoa ectoparasites and the correlation between blood glucose levels and the infestation of protozoa ectoparasites in humpback grouper (Cromileptes altivelis) in the Sea Cultivation Development Unit, Situbondo, East Java. This research is survey research. The sample was in the form of a humpback grouper (Cromileptes altivelis) measuring 13-20 cm, 30 of which were randomly drawn from a population of 2,000 individuals. The results of the study showed that the blood glucose level of the humpback grouper Nurserys was the lowest of 21 mg/dL and the highest was 67 mg/dL. Humpback grouper Nurserys began to be infested withTrichodinasp. Ectoparasites, andCryptocaryonsp. in fish with glucose levels of 25-28 mg/dL included in the category of normal infestations, while fish with glucose levels of 29 - 36 mg/dL (Normal) are included in the category of mild to severe infestations. The results showed that there was a very close correlation between blood glucose levels of humpback grouper Nurserys and ectoparasite infestations. The higher the blood glucose level the higher the ectoparasite infestation in the Nurserys of the humpback grouper.
Study of heavy metal content cadmium (Cd) in various sizes of blood shells (Anadargranosa) in coastal Bancaran Bangkalan, Madura
Authors: Ulfah E S , Rahardja B S , Pursetyo K T
Published: February 2020

Ocean pollution occurs because of the concentration of population and industrialization in the coastal areas. The existence of heavy metals in the water can be accumulated in aquatic organisms, especially blood shells. The purpose of this study is to know the contents of cadmium (Cd) in blood shells, water, sediments and to determine the relation of blood shell’s size with the contents of cadmium (Cd) in the Bancaran Coastal, Bangka, Madura. The research method used was observations of that method. The main parameters are observed that the contents of cadmium (Cd) in seawater, sediment, and blood in the Bancaran Coastal shells. Supporting parameters that observed are water quality include temperature, pH, salinity, DO and brightness. Data analysis is used to find relations of the data Obtained (regression-correlation). The results showed that the contents of cadmium (Cd) of large shells blood are higher than the small and medium blood shells, and there were the relations between the size of the blood shells with the contents of cadmium (Cd). The water quality of Bancaran Coastal was the temperature 28°C-29°C, pH 7-8, the salinity of 30 ppt, the brightness of 30 cm, and DO 5 mg/L.
Effect of dense stocking of Gracilaria sp on growth and survival of milkfish (Chanos chanos forskal) on polyculture culture systems
Authors: Isroni W , Bahri A S , Amin A A
Published: February 2020

Milkfish cultivation has long been recognized by farmers and is now developing in almost all Indonesian waters. Fish culture technology is also experiencing rapid development, ranging from traditional maintenance to intensive technology that requires seed, water, and planned feed management. One way to fill the empty ecological space is to cultivate a mixture (polyculture) between several fisheries commodities. With this system, the benefits obtained are high land productivity. The development of aquaculture technology shows that milkfish (Chanos chanos Forskal) can be cultivated together with Gracilaria sp. Seaweed in a pond. This polyculture system can increase the efficiency of land use and farmers’ income in a sustainable manner. The study was conducted using the experimental method. The density of gracilaria sp distribution in this study was: treatment A (nongracilaria), treatment B (gracilaria 50 Kg), treatment C (gracilaria 100 Kg), treatment D (gracilaria 150 Kg) and Treatment E (gracilaria 200 Kg). The design used was a completely randomized design (CRD) with 5 treatments and 3 replications. The main parameters observed were growth including absolute length, absolute weight, specific growth rate, and survival. As supporting data the measurement of water quality is also carried out.
Effect of probiotic duration and dose of coffee peel fermentation (Coffea sp.) on crude protein and crude fiber as an alternative fish feed ingredient
Authors: Fatmawati N , Agustono  , Lamid M
Published: February 2020

The research aimed to find out whether there was interaction between fermentation duration and probiotics dose toward the increase in crude protein and decrease in crude fiber content in coffee peel. This research was experimental using complete randomized design (RAL) factorial, data analysis using duncan. The result of the research showed that there was interaction between duration and probiotics doses in coffee peel fermentation to crude protein in day 5 of fermentation duration with probiotics dose of 5%, it was the highest result of crude protein content. There was no interaction between duration fermentation and probiotics dose in fermentation of coffee peel toward crude fiber content in day 7 duration of fermentation with probiotics dose of 5%, it was the result of the lowest crude fiber. Fermentation in 7 days with dose of 5% was the best result. There was increase of protein from 12.15% to 13.93% and decrease of fiber from 34.27% to 30.8%.
Growth performance and survival rate of Boeseman’s rainbowfish (Melanotaenia boesemani) in natural spawning technique at Depok, West Java, Indonesia
Authors: Akhsan W M , Nur B , Dewi N N
Published: February 2020

Boeseman’s rainbowfish is an endemic ornamental fish from Papua. This fish is popular because of its beauty and uniqueness. Problems that occur in rainbow fish farming are low growth rates and high mortality rates in the larvae stage. The purpose of this research is to analyze the growth performance and survival rate of Boeseman’s rainbowfish. This research was conducted at BRBIH Depok, West Java, on December 17, 2018, until January 17, 2019. The technique is used was natural spawning technique. In this technique used aquarium containers and fiberglass tanks. Maintenance of the parent is done by feeding Chironomus sp. twice a day. The parent selection is carried out before the spawning process. The results of spawning for 20 days had a fertilization rate of 91.47 % and a hatching rate of 86.12%. Growth monitoring results of the average growth rate were 0.0031 g/day, the specific growth rate was 0.013 – 0.095 %bb/day and the survival rate of larvae was 47.24%.
Masculinization of guppies (Poecilia reticulata) using water of coconut hybrid variety with the immersion method of pregnant female
Authors: Meiliana G , Sulmartiwi L , Lutfiyah L
Published: February 2020

This encourages monosex male guppies cultivation which can be done through sex reversal techniques, namely masculinization by adding safer natural ingredients. The purpose of this study was to determine the effect of immersion of pregnant guppies fish using water of coconut hybrid on the percentage of male larvae and determine the dose of coconut water and the duration of immersion. The research method used was the experimental method with Factorial Completely Randomized Design continued with DMRT. The results of immersion of pregnant guppies fish in a solution of water coconut hybrid with different dosages and the duration of immersion had a significant effect (P <0.05) on the percentage of male larvae. The dosage of 15 ml coconut water for 10 hours produced 66.90% male guppies fish larvae. Supporting parameters showed results at a dose of 15 ml with the duration immersion of 10 hours obtained survival of 100%. Water quality during immersion and maintenance of larvae, namely temperatures of 26 - 28 oC, pH 6.6 - 8.0 and DO 6.4 - 6.8 mg/L.
The effect of combination Bifidobacterium sp and Lactobacillus acidophilus probiotic on egg yolk cholesterol, HDL, and LDL
Authors: Lokapirnasari W P , Sahidu A M , Maslachah L , Yulianto A B , Najwan R
Published: February 2020

The purpose of this study to evaluate the effects of combination 0.5% Bifidobacterium sp.+0.5% Lactobacillus acidophilus on egg yolk cholesterol, High density lipoprotein (HDL) and low density lipoprotein (LDL) in hens. Methods: this research using completely randomized design. Sixty layers were randomized into three treatments, each treatment contains four replicates and each replicates contains five hens. Twenty five week-old Isa Brown layers were fed without probiotic (T0), 0.1% antibiotic growth promoters (T1), 0.5% Bifidobacterium sp.+0.5% L. acidophilus (T2) for 30 days. Result: the result showed that there was a significant difference between the control and all treatment groups on egg yolk cholesterol, HDL and LDL. Supplementation of 0.5% Bifidobacterium sp.+0.5% L. acidophilus probiotic decreased the egg yolk cholesterol and LDL (p<0.05) and increased HDL in egg yolk (p<0.05) levels. The lowest egg yolk cholesterol and LDL by supplementation 0.5% Bifidobacterium sp.+0.5% L. acidophilus probiotic (155.86 and 48.46 mg/dL) respectively, compared the control (224.0200 and 58.6300 mg/dL) and the highest egg yolk HDL by supplementation of 0.5% Bifidobacterium sp.+0.5% L. acidophilus probiotic (50.00 mg/dL) compared the control treatment (41.5900 mg/dL). The conclusion of this study was the supplementation of 0.5% Bifidobacterium sp.+0.5% L. acidophilus could improve egg yolk quality of hens.
Morphometric asymmetry of Barbodes binotatus (cyprinidae) collected from three different rivers in Java
Authors: Astuti S S , Hariati A M , Kusuma W E , Wiadnya D G R
Published: February 2020

Barbodes binotatus (Bleeker, 1859) is an endemic freshwater fish species that currently used for aquaculture. Good quality seed can be attained from cross-breed of parental stock from different geographical areas. This study aimed to distinguish morphological asymmetry of the species collected from three different rivers in Java: Sungai Tawang (East Java); Sungai Opak (Central Java); and Sungai Cisanggarung (West Java). Total 30 specimen were randomly sub-sampled from each river. Morphology, morphometry and meristic characters, based on 14 anatomical landmarks were measured and analyzed using Thin Plate Spline (TPSDIG), Symmetry-Asymmetry Geometric Analysis (SAGE) and Principal Component Analysis (PCA). Result of SAGE analysis showed that there were no significant asymmetries observed within, and between regions, respectively (p > 0.05). The result of PCA analysis however, showed qualitative differences in ratio between eye diameter (ED) versus head length (HL) (49%) and total length (TL) versus standard length (SL) (17%). Genetic (through DNA analysis) study need to be elaborated to see the differences more accurately.
Neobenedenia girellae infestation on cobia (Rachycentron canadum) in Hurun Bay Lampung, Indonesia
Authors: Putri R D B , Rivaie A R , Subekti S , Sari P D W
Published: February 2020

Cobia (Rachycentron canadum) is newly developed fish in Indonesia with an export value, however, the production activities of this fish continue to decrease due to fish massive mortality caused by disease. This study aimed to determine the predilection, prevalence, and intensity of Neobenedenia girellae infestation on cobia in floating net cages culture at Hurun Bay, Lampung. The sampling method used in this study was the purposive sampling method. Fish samples were taken at 20-30 cm as much as 50 fish, while 40-50 cm as much as 20 fish. Neobenedenia girellae were found on cobia eyes, head, and fins. Results showed the prevalence level in 20-30 cm fish was 30% and intensity level was 2.31 parasites/fish, while in 40-50 cm fish showed the prevalence level of 65% with the intensity of 1.47 parasites/fish.
Ecotourism development through legality of mangrove processed products dan river tracing in Cemara Beach, Banyuwangi, East Java, Indonesia
Authors: Setyaningrum E W , Erwanto Z , Prapti K P , Jayanti A L , Dewi A T K , Susanti H D
Published: February 2020

Mangrove ecotourisms in Cemara Beach Banyuwangi Regency continues to grow. Community groups develop Cemara Beach by utilizing mangroves as natural resources without reducing the value of conservation. Mangrove processed which have been produced is mangrove peyek, mangrove tea, and mangrove syrup. The problems founded is 1) legality of mangrove product like peyek, tea, and mangrove syrup, 2) The potential of Mangrove Rivers that have not been explored. The method used is training related to the legality of processed food products, as well as observation and documentation for the utilization of mangrove-surrounded rivers in Cemara Beach. The purpose of this is the people who are members of the Joint Business Group of Rejo Beach Pakis Banyuwangi Village, which has been consistent and committed to developing the Cemara Coast area through evaluation values. The approved results are training on food security, and that become the basis for the issuance of the legality of processed mangrove products that are certified as Household Products (P-IRT). Another result is an ecotourism attractions by traversing rivers using boats or called a mangrove tracing, where the river facilitates mangrove trees with a path to the river and sea or estuary.
The fertilization of Tor soro fish (Valenciennes, 1842) using post cryopreservation sperm: the effect of skim milk as a cryoprotectant
Authors: Harjanti E R , Abinawanto  , Arifin O Z , Kristanto A H
Published: February 2020

Tor soro, an endemic fish from North Sumatera, has a high economic value. Environmental damage causes a decreasing ofTor soropopulations and leads to the extinction of these fishes in their natural habitat. Cryopreservation is an efficient strategy that can be used to minimize the problem. The success of this approach depends on how effective it is. This study to evaluate the fertilization ofTor sorousing post cryopreservation spermatozoa 48 hours. The sperms collected by stripping, followed by the dilution using soluble liquid (fish ringer methanol 10%+skim milk) 1:9 comparison. The concentrations of the skim milk that is used in 0%, 5%, 10%, 15%, 20%, and 25%. The equilibration was carried out at the 5°C for 10 minutes before, then it kept frozen at the temperature of -10°C for 48 hours. The sperm thawing was carried out at the 40°C for 1 minute and one hundred egg cells (±1 g) were fertilized using 1.5ml of post cryopreservation sperm. The ANOVA test showed there was a fertility percentage effect of the skim milk on the frozen sperm. The 10% skim milk give an optimum with the highest fertility of (p<0.05) with 91.25±2.22% and motility (p<0.05) in 10% with 82.90±1.40%.
Honey effect on sperm motility of kancra fish (Tor soro Valenciennes, 1842) after 48 hours freezing
Authors: Putri B S D , Abinawanto  , Arifin O Z , Kristanto A H
Published: February 2020

Kancra (Tor soro) is a freshwater endemic fish found in specific place of Indonesia, with a drastic decrease in its population due to the varying gonad maturity times between males and females. However, the use of cryopreservation is effective for the synchronization of their gametes using cryoprotectants. Therefore, this study aimed to determine the effect of honey concentration (0%, 5%, 10%, 15%, 20%, and 25%) using 10% of methanol in the spermatozoa motility of kancra fish 48 hours after cryopreservation. The study was conducted in the Research and Development Institute for Freshwater Fish Genetic Resources (Balai Besar Perikanan Budidaya Ikan Tawar, BBPBAT), in Cijeruk, Bogor, West Java. The sperm were collected through the stripping method followed by the evaluation of spermatozoa motility 48 hours after cryopreservation. Furthermore, it was equilibrated for 10 minutes at a temperature of 5 ºC, frozen at 10 ºC for 48 hours, and thawed for 1 minute at 40 ºC. The data were analyzed using ANOVA followed by the Tukey test. Additionally, the ANOVA test showed that honey had effects (P<0.05) on the motility percentage after cryopreservation with a 5% optimum concentration using 85.97±1.91%.
The spermatozoa viability of kancra fish (Tor soro, Valenciennes 1842) 48-hour after freezing: effect of brown sugar as natural cryoprotectant
Authors: Pamungkas M A B , Abinawanto  , Arifin O Z , Kristanto A H
Published: February 2020

Kancra fish (Tor soro, Valenciennes 1842) is one of the endemic fish in Indonesia which population keeps decreasing due to degradation of the environment. Conservation is needed and cryopreservation is an effective strategy in this regard. Brown sugar as a natural cryoprotectant has the potential to substitute less eco-friendly synthetic cryoprotectant. The study was carried out to determine the viability of T. soro spermatozoa after 48 hours of cryopreservation using brown sugar. Sperm sample were collected through stripping method. The ejaculated sperm were diluted using the extender (brown sugar-fish ringer + methanol 10%, 1:9). The brown sugar concentration examined were 0%, 5%, 10%, 15%, 20%, and 25%, and the sample was equilibrated at 4 °C for 10 minutes, and frozen at -10 °C for 48 hours. The process was followed by thawing process ast 40 ºC for 60 seconds. Data were analyzed using ANOVA, followed by Tukey test. The results showed that brown sugar concentration of 15% significantly affects viability of the sperm after 48 hours of cryopreservation with 83.75±1.71% (p<0.05). However, a study is needed to determine the effectivity of brown sugar as a cryoprotectant.
Feed additive of curcuma flour (Curcuma xanthorhiza) in commercial feed to growth rate and feed efficiency of tambaqui (Colossoma macropomum)
Authors: Oktavianti I , Agustono  , Lamid M
Published: February 2020

Tambaqui (Colossoma macropomum) is much demand by the public as a consumption fish. Addition of curcuma in feed to increase fish appetite because it contains curcumin and essential oil. The purpose of this study was to determine the growth rate and food efficiency in tambaqui (Colossoma macropomun) with feed additives of curcuma flour (Curcumaxanthorhiza) on commercial feed. The research method used is the experimental method. The research design used was a Completely Randomized Design (CRD). Having 5 types of treatment with repeated 4 times. The treatment used was the addition of curcuma flour on commercial feed, namely P1 (2.5%), P2 (5%), P3 (7.5%), P4 (10%) and P0 (100% commercial feed). The main parameters observed were the growth rate and feed efficiency. The supporting parameters observed were water quality (temperature, pH, DO and ammonia). Data analysis using Analyze of Variance. The results of the feed additive of curcuma in commercial feed of tambaqui have the highest average value of growth rate in P0 treatment, but not significantly different (P> 0.05) with treatment P1, P2, P3 and P4. Feed efficiency values have the highest average value in P2 treatment, but not significantly different (P> 0.05) with treatments P0, P1, P3 and P4.
Effect of date palm (Phoenix dactylifera l.) on spermatozoa viability of kancra fish (Tor soro Valenciennes 1842) 48 hours post cryopreservation
Authors: Alifiani D P , Abinawanto  , Subagja J , Kristanto A H
Published: February 2020

Kancra is an endemic fish used in traditional functions in different parts of Indonesia. However, the population of the fish is decreasing due to environmental damage and excessive fishing. Cryopreservation of sperm of kancra fish is one of the most effective approaches to solving this problem. One of the success factors of cryopreservation is cryoprotectant. This study aims to evaluate the date palm juice as a natural cryoprotectant on the viability percentage of kancra fish after 48 hours of post cryopreservation. The sperm was collected by stripping and was diluted in the soluble liquid (fish ringer solution+methanol 10%+ date palm juice). The date palm juice concentration used were 0%, 5%, 10%, 15%, 20% and 25%. The sperm was equilibrated for 10 minutes at the 5°C temperature before it was frozen for 48 hours at the -10 °C. The thawing was done for 1 minute at 40 °C. Data were analyzed using ANOVA and followed by Tukey test. The result showed there was an effect of date palm juice (p<0.05) on the viability percentage of sperm post cryopreservation. The 10% concentration of date palm juice was optimum (p<0.05) with the percentage of viability 80.75 ± 1.19%.
The effect of fucoxanthin as coloring agent on the quality of Shrimp Paste
Authors: Zahrah Z , Amin M N G , Alamsjah M A
Published: February 2020

Colour is one of quality attributes of shrimp paste where some industries add non-food grade colouring agent, which may possibly generate adverse effects for customer. The development of colouring agent for shrimp paste is a crucial field of study in the food technology. Fucoxanthin, a yellow pigment extracted from Sargassum sp. which was proven capable of possessing antioxidant activity was used in this study to colorize the produced shrimp paste. The fucoxanthin concentration of 0%, 3%, 6%, 9%, and 12% was designed by using a completely randomized design with four replications of each level. This research revealed that the addition of fucoxanthin significantly affected the colour (L*, a*, b*, and °hue), but did not significantly affect the preference of odour and texture. This study investigated that the fucoxanthin concentration of 12% was the best concentration.
Hematological parameters of Catfish (Clarias sp) vaccinated by Aeromonas hydrophila with different application methods
Authors: Nadiro V N , Puspitasari I , Setyastuti T A , Santika A
Published: February 2020

The study aim was to find the effect of different vaccination application methods on hematological parameters of catfish (Clarias sp). A 107
Aeromonas hydrophila measured by 625 nm wave length of Spectrophotometer was applied on 25 catfish with average weight 15.83 g. The application methods were dipping (1 ml/10 l water) and intramuscular injection (0.1 ml/fish). Hematological parameter measured were hematocrit levels, total leukocytes and phagocytic index. Measurement were conduct on day 0, 21, 23 and 27 after vaccine application. The results showed that hematocrit level on fish with injection method were higher (21.02%) than dipping method (15,05%), total leukocytes on fish with dipping method were higher (3,29 x 104 cells/mm3) than injection method (3,15 x 104 cells/mm3) and phagocytic index on fish with injection were higher (25%) than dipping method (23%). The survival of catfish were also observed, and showed that catfish with injection method have higher survival rate (36%) than dipping method (34%). Aeromonas hydrophila vaccine applied with injection method have shown better immune response on catfish (Clarias sp) hematological parameters than one with dipping method.
Optimization of spermatozoa cryopreservation of Albino pangasius catfish: cryoprotectants with various concentrations and different equilibration times
Authors: Hasanah U , Abinawanto  , Alimuddin A , Boediono A
Published: February 2020

This study was aimed to optimize the spermatozoa cryopreservation protocol in Albino pangasius catfish by assessing the effectiveness of different cryoprotectant concentrations and different time of equilibration. The first experiment was conducted to optimize the combination of 10% methanol with different concentration of skim milk (0%, 5%, 10%, 15%, and 20%). The second experiment was aimed to optimize different equilibration time (10, 20, and 30 minutes). Deep freezer was used for the cryopreservation with a temperature of -80 °C at a storage period of 8 days. The first study found that the viability and motility of sperm after cryopreservation was significantly different (P<0.05) with fresh sperm. The best result was obtained at the 10% skim milk concentration with sperm viability of 78 ± 4.35% and motility of 69.66 ± 1.52%. The second experiment identified a significant different (P<0.05) in sperm viability and motility between fresh sperm and sperm post equilibration. The best result was obtained at 10 minutes equilibration time with sperm viability of 76 ± 1.15% and motility of 66 ± 2.64%. The study concluded that the 10% methanol with 10% skim milk, and 10 minutes equilibration time is the best combination for cryopreservation of Albino pangasius catfish spermatozoa.
The optimal n/p ratio of shrimp culture waste liquid fertilizer on growth of Chlorella vulgaris
Authors: Hidayati P A , Mubarak A S , Sudarno
Published: February 2020

Environmental quality protection is done by processing shrimp waste into materials of high use value, including liquid fertilizer. The value of N/P ratio in shrimp culture waste fertilizer is still relatively low so it needs to add urea as a source of nitrogen to increase the N/P ratio in fertilizer. The purpose of this research was to determine the optimal N/P ratio in shrimp culture waste fertilizer to the growth ofChlorella vulgaris. The research method used in this research was an experimental method, A completely randomized design with 5 treatments and 4 replications. The treatments used are giving different N/P ratios from shrimp culture waste fertilizer enriched by urea, with N/P ratio 10:1, 15:1 and 20:1, whereas Walne fertilizer with N/P ratio 17:1 and shrimp culture waste fertilizer with N/P ratio 5,5:1 as a control. Data analyze was processed use ANAVA and followed by DMRT. The results of the research showed that the using of different N/P ratios in shrimp culture waste fertilizer enriched by urea gave a significantly different effect on the population and growth rate with the highest population average of 1030x104cell/ml and an average growth rate of 203x104cell/ml/day during the exponential phase.
Profile of Kerandang Fish (Channa pleurophthalmus Blkr) Proteins from Central Kalimantan
Authors: Aryani  , Suprayitno E , Sasmito B B , Hardoko
Published: February 2020

Kerandang fish (Channa pleurophthalmusBlkr) as one of freshwater fish from the Channidae family which is very potential and abundant in Central Kalimantan. The aim of this research was to determine and obtain a picture of the protein profile Kerandang fish. The benefit of this research is that Kerandang fish can be utilized maximally as one of the nutritious foods to demand the nutritional needs of the people in Central Kalimantan. This research was conducted exploratively qualitative with the parameters of the proximate test, amino acids using HPLC and determination of protein molecular weight using SDS-PAGE. The results obtained for the proximate test were 76.48% water content, 16.35% protein content, 0.35% fat content and 6.82% carbohydrate content. The results for amino acids assay obtained 15 types of amino acids, 8 types of essential amino acids with the highest type of amino acid, Leucine 4.69% and 7 types of non-essential amino acids with the highest type of amino acid, glutamic acid 9.11%, and total acid amino 53.32%. The result of analysis of protein profile of Kerandang fish meat based on its molecular weight using SDS-PAGE there are 27 protein bands in the range of molecular weights 10.202 - 134.432 kDa.
Change of hepatopancreas conditions in intensive shrimp aquaculture (Litopenaeus vannamei) at Mayangan Village, Legon Kulon District West Java
Authors: Dana D A , Setyastuti T A , Puspitasari I , Sukamto D
Published: February 2020

The study of hepatopancreas purpose to monitor changes in the health condition of shrimp, which is hepatopancreas is a vital organ of metabolism and digestive system. This study was conducted in intensive shrimp ponds in Mayangan Village, Legon Kulon for 82 days. Sampling was carried out every 10 days. Hepatopancreas preparation was conducted by taking 30-50 mg with adding 0.1-0.2 ml of immersion liquid and observing used a microscope at 40x magnification. The parameters of hepatopancreas observed such as microphili, lipids, wrinkles, and necrosis. After monitoring the microphili in the Day of Culture (DOC) 1 - 40, the average score range shows that the culture shrimp is 90-100% healthy. in DOC 43 until the last sampling has decreased by 40-0% which is assumed to be the effect of a White Feces Disease (WFD). The lipid and wrinkle in DOC 1-40 sampling showed that the average range shrimp culture was 90-100% healthy. While in DOC-43 sampling until the last of lipid and wrinkle sampling decreased by 60-0%. Hepatopancreas necrosis in DOC 1-31 sampling does not exceed from 20%, while DOC-40 sampling until the last of necrosis sampling continues to increase to 100% assumed by WFD and WSSV (White Spot Syndrome Virus).
The efficacy of probiotic with different storage to decrease the total organic matter, ammonia, and total Vibrio on shrimp pond water
Authors: Farizky H S , Satyantini W H , Nindarwi D D
Published: February 2020

Organic matter, ammonia, and total Vibrio are some parameters in shrimp culture media that can influence the success of shrimp culture. This study aims to determine the effect of Pseudomonas and Bacillus probiotic storage duration on decreasing organic matter, ammonia, and Total Vibrio in shrimp pond water. This study used a Completely Randomized Design (CRD) with five treatments namely without the addition of probiotics (P0, control), addition of fresh probiotics (P1), addition of probiotics with a storage period of 1 month (P2), addition of probiotics with a storage time of 2 months (P3) and addition of probiotics with a storage period of 3 months (P4). Each treatment repeated four times. The content of total organic matter and Vibrio in water measured on day 0 (initial), and third (end), ammonia content was measured every 24 hours during the study (t0-t3). The results showed that the addition of probiotics with a long storage different give in decreasing total organic matter, ammonia, and Vibrio in shrimp pond water. Addition of probiotics with a storage period of 3 months gave a Total Vibrio, organic matter, and ammonia content lower compared to the shrimp pond water without adding probiotics and gave significantly different (p <0.05).
Niche ornamental-marine fishery of Bangsring and the surrounding areas
Authors: Wiadnya D G R , Hariati A M , Kusuma W E
Published: February 2020

Indonesia exported >900 species of marine ornamental organisms, considered the largest together with The Philippines. However, records on catch statistics are negligible — this study conducted along the coastal area of Bangsring (Banyuwangi) and Gerokgak (Bali). The research aimed to identify species diversity, dominant families, and catch composition. Species diversity was estimated through underwater visual census and catch records from three fish collectors in the area. All the species were photographed and deposited at Depository Ichthyologicum Brawijaya, each with a specific accession number. Species identification merely based on morphology and color-stained for transparent osteology. The results of the analysis showed that there at least 106 species out of 483 specimens collected from middlemen. It consisted of 25 families and 59 different genera. The fish sources came from local surrounding West Bali National Park (Pinggiran), Madura Islands (Bunian), and the eastern part of Indonesia (Tanjungan). Unit price at middlemen levels varied between US$ 0.2-3.6 per species, with an average of US$ 0.95±0.95 (n = 106). Three Tanjungan species:Hoplolatilus luteus, Pomacanthus imperator, andParacanthurus hepatussold at unit price US$ 8.5. This niche fishery needs specific management measures to control the supply chain apart from its economic contribution to national income.