bluuebunny/crossref_metadata_2025_split huggingface dataset:
Pristine and transition metal decorated holey graphyne monolayer as an ammonia sensor: insights from DFT simulations
Authors: Lakshmy Seetha , Kundu Ajit , Kalarikkal Nandakumar , Chakraborty Brahmananda 
Published: December 2022

Abstract
The first-principles density functional theory method has been employed to comprehensively investigate adsorption configurations, adsorption energies, electronic properties, and gas sensing characteristics of pure and transition metal (TM = Sc, Pd, and Cu) decorated holey graphyne (HGY) monolayer for the detection of ammonia (NH3). The calculations reveal that the NH3 molecule weakly interacts with the pristine HGY surface with an adsorption energy of −0.146 eV. The expedited charge transfer and strong orbital hybridization between the NH3 molecule and the decorated TM (except Pd) resulted in the strong adsorption of the NH3 on the TM-decorated system. Among the three metals, it is found that the Sc decorated HGY can be regarded as the potential NH3 sensor owing to its reasonable adsorption energy of −1.49 eV, a large charge transfer of 0.113e, and an attainable recovery time of 3.2 s at 600 K. Furthermore, the stability of the Sc decorated HGY structure at ambient temperature is also validated using the ab initio molecular dynamic simulations. The results of the current study mirror the probable application of 2D HGY-based gas sensors for the detection of ammonia.
Molecular beam epitaxy growth and scanning tunneling microscopy study of 2D layered materials on epitaxial graphene/silicon carbide
Authors: Lu Hui , Liu Wenji , Wang Haolin , Liu Xiao , Zhang Yiqiang , Yang Deren , Pi Xiaodong 
Published: December 2022

Abstract
Since the advent of atomically flat graphene, two-dimensional (2D) layered materials have gained extensive interest due to their unique properties. The 2D layered materials prepared on epitaxial graphene/silicon carbide (EG/SiC) surface by molecular beam epitaxy (MBE) have high quality, which can be directly applied without further transfer to other substrates. Scanning tunneling microscopy and spectroscopy (STM/STS) with high spatial resolution and high-energy resolution are often used to study the morphologies and electronic structures of 2D layered materials. In this review, recent progress in the preparation of various 2D layered materials that are either monoelemental or transition metal dichalcogenides on EG/SiC surface by MBE and their STM/STS investigations are introduced.
Comment on ‘Quantum principle of relativity’
Authors: Del Santo Flavio , Horvat Sebastian 
Published: December 2022

Abstract
Dragan and Ekert (New J. Phys.
22 033038) have recently claimed that fundamental properties of quantum physics (e.g. fundamental indeterminism and the principle of superposition) can be derived solely from relativistic considerations, if one takes as physically meaningful superluminal reference frames. In this comment we show that their arguments are flawed and their claims therefore unwarranted.
Flash drought drives rapid vegetation stress in arid regions in Europe
Authors: O Sungmin , Park Seon Ki 
Published: December 2022

Abstract
Flash droughts are characterised by rapid onset, combined with the potential to severely impact agriculture and ecosystems. However, assessments of the ecological impacts of flash droughts, especially in Europe, are largely lacking. Here we investigate ecosystem responses to flash droughts in Europe between 2001 and 2019 using diverse observational data, including gross primary production (GPP) and leaf area index (LAI). We find that in arid regions an abrupt transition to water-stressed conditions occurs within a few weeks, which negatively affects vegetation status and reduces carbon uptake in the initial stages of drought; normalised anomalies of LAI and GPP decrease to about −0.5. By contrast, vegetation in humid regions is not as severely affected, given that soil moisture recovers relatively quickly. We also show that soil moisture status before the onset of drought significantly impacts the timing (1–5 pentads) and degree (−0.33 to −0.71 of normalised LAI and GPP anomalies) of drought-induced vegetation stress, particularly in arid regions. Our results highlight the regional characteristics of flash drought impacts for more informative monitoring and early warning systems.
The Great Potential of Sengarat Fish (Belodontichthys dinema, Bleeker 1851) to Become an Aquaculture Commodity in Buluh Nipis Village, Siak Hulu District, Kampar Regency
Authors: Lesmana I , Heltonika B , Darfia N E , Hendrizal A , Adelina A , Mulyani I , Fitra D 
Published: December 2022

Abstract
Sengarat fish, with the Latin name Belodontichthys dinema, Bleeker 1851, is a fishery commodity with high economic value and became a proud species of the community and was used as an icon of Riau Province. The current condition is that the existence of Sengarat Fish continues to decline due to overfishing, the use of fishing gear that is not environmentally friendly, and habitat destruction. Therefore, it is necessary to domesticate as an effort to develop sengarat fish into one of the aquaculture commodities. This study aims to determine the ecological value and economic status from the angle of fishing fishers and collecting traders, as well as the public’s interest in sengarat fish farming. The research was conducted in Buluh Nipis Village, Siak Hulu District, Kampar Regency, in July 2022. The method used is a description analysis obtained from literature, interviews, and surveys. The respondents used for interviews and surveys were ten people with the status of capture fishers and one gathering merchant. The Kampar river environment, which is used as a sengarat fishing ground, has a reasonably good condition but has experienced siltation due to the conversion of land into oil palm plantations along the watershed. Based on interviews, the catch of sengarat fish by fishers has declined over the past five years. This is characterized by not every day sengarat fish caught and only existing in certain months or seasons. The economic status of sengarat fish is high economic fish, characterized by a reasonably high selling price in the market, which ranges from Rp.130,000 to Rp.150,000-per kilogram. The status of sengarat fish farming is that wild fish are still being caught in the country, and there is no technology or effort to cultivate them.
Replacement of Soybean Meal with Kapok Seed Oil Waste Meal (Ceiba Petandra ( L.) Gaertn.) on Growth, Survival and Intestine Histology of Milk Fish (Chanos-Chanos Forsskal, 1775)
Authors: Kurnia A , Muskita W H , Hamzah M , Yusnaini Y , Abidin LOB 
Published: December 2022

Abstract
The requirement for replacement of soybean meal (SBM) as commonly vegetable protein in fish feed with local potentially vegetable protein as an important for looking the low price of feed ingredient in to create the sustainability aquaculture. The objective of this study was to determine the effect of replacement of SBM with kapok seed oil waste meal (KSWOM) in the diet on the performance and histology in milkfish (Chanos chanos). Four experimental diets were formulated to contain KSOWM as substitution of SBM in the diet, with inclusion level of 0%, 25%, 50% and 75%. Total 120 juveniles (initial weight: 1.14± 0.09 g) were placed into twelve glass tanks (10 juveniles/tank) and the juvenile were reared with using water recirculating system. The feeding frequency of the milk fish was twice a day (8:00 a.m. and 4:00 p.m.) with doses of 5% body weight for 60 days of rearing. The histology of intestine were also assessed. The results indicated that weight gain of the milk fish was significantly different with replacing of 25%, 50% and 75% dietary SBM with KSWOM in the diet. Moreover this feeding trial, survival rate, feed efficiency, and feed conversion ratio of the fish fed the KSOWM diet were significantly different lower than the milkfish fed without replacement of SMB dietary in the diet. Histological analysis showed that of intestine of the fish fed with even though diet contained 25% KSOWM showed also indicated damage in their intestine morphological figure. The present study revealed that replacement less than 25% SBM with KSOWM in the diet might be growth perform well and decrease of histo-morphological damage of the intestine of milkfish.
Effects of Vitamin C and Squid Oil Supplementation on Gonad Maturation of Climbing Perch Broodstock (Anabas testudineus Bloch).
Authors: Fitriliyani I , Aminah  , Murdjani A , Bijaksana U , Fatmawati  , Redha E , Aisyiah S , Kusumawardani D 
Published: December 2022

Abstract
This study aims to determine the effectiveness of adding vitamin C and squid oil to commercial feed for broodstock fish (Anabas testudineus Bloch) on the speed of gonadal maturation and growth. The study was conducted for three months using a completely randomized design with 4 treatments and 3 replications. The test fish were 10 each in each treatment hapa, the treatment of feed A (Commercial feed =CF); B (CF + Vit c 2gr/kg; C (CF+ squid oil 3 ml/kg) and D (CF+ Vitamin C 2 g/kg + Squid oil 3 ml/kg). Feed was given in the morning and evening satiation for 30 days. The results showed that the commercial feed added with a combination of vitamin C 2000mg/kg feed and squid oil as much as 3mg/kg feed (Treatment D) gave the best gonadal maturity level. This is indicated by the average Gonadosomatic Index (GSI) of 4.20% and the average HepatoSomatic Index (HSI) of 3.91%, higher than other treatments. Supported by statistical test results showed very significant differences in somatic gonadal index, hepatosomatic index, egg diameter and absolute fecundity. Meanwhile, growth and condition factors did not show significant differences. There is a tendency that if the dose of vitamin C and squid oil is increased again, it will be able to increase the gonad maturity of the broodstock of climbing perch.
Microbiological Quality of Vannamei Shrimp Pond Waters in Rupat Island, Bengkalis District, Riau.
Authors: Nursyirwani N , Mardalisa M , Batubara U M , Nurhayati N , Putri R F 
Published: December 2022

Abstract
The presence of pathogenic bacteria in shrimp culture water could influence the shrimp growth and production. This research aimed to quantify total coliform, Escherichia coli and total Vibrio in pond water of Vannamei shrimp (Litopenaeus vannamei) culture in Rupat Island. Water samples from inlet water (IW), water from three ponds (PW2, PW3, PW6) and outlet water (OW) were collected for the quantification of total coliform and Escherichia coli by the MPN technique and total Vibrio count on TCBS agar. Coliforms was found in all water samples, the lowest count was in inlet water sample (20 MPN/100 mL), and the highest was contained in outlet water (>2400 MPN/100 mL), however E. coli was not detected in all water samples. Meanwhile, the lowest total Vibrio count was found in PW3 (6.35 × 103), and the highest was in the PW6 (3.10 × 105). In addition to the microbiological quality, some water quality parameters were also observed, those were water temperature in the range of 27.5- 29.4°C, salinity of 18.7-21.5 ppt, pH of 7.17-7.89, DO of 1.3-7.6 mg/L, NH3 content of 0.96-1.26 mg/L and DOM of 26.2–27.6 mg/L. The data indicated that pathogenic bacteria were present in all pond waters which should be decreased for the safety shrimp production.
The Effect of Culture Media Types on the Growth of Marine Microalgae Chlorella vulgaris
Authors: Mardalisa M , Zalfiatri Y , Rahmayuni R 
Published: December 2022

Abstract

Chlorella vulgaris is one of the marine microalgae that has potential to be developed, one of which is the renewable energy sector, biodiesel. The growth media used in the biomass production of microalgae are very various, such as Walne, Guillard, and Agriculture Fertilizer (Urea). This study aims to determine the effect of types of growth media on population density, absolute growth, relative growth rate, and specific growth rate of C. vulgaris. Study on 3 media types of microalgae growth shows the density of C. vulgaris cultured on a laboratory scale experienced the highest peak density in the Guillard media on the 3rd day around 7430 x 104 cells/mL. However, the lowest density peak was in the Urea culture about 2520 x 104 cells/mL, followed by Walne media around 3335 x 104 cells/mL. The highest absolute growth average was found in the Guillard media about 6311 x 104 cells/mL and the lowest was in the Urea and Walne media about 1401 x 104 cells/mL and 2216 x 104 cells/mL, respectively. Meanwhile, in C. vulgaris culture, it was found that Guillard and Walne media produced the highest relative growth of 564% and 198% and the lowest was at 125% for Agriculture Fertilizer (Urea). In the process of culturing C. vulgaris for 6 days, it was found that Guillard media showed the highest average specific growth rate of 58% per day and the lowest was on Urea culture as much as 27% per day, followed by Walne media about 36%.
Physicochemical Characterization of Calcium Oxide from Freshwater Mussel (Pilsbryoconcha sp.) Shell
Authors: Sidauruk S W , Iriani D , Diharmi A , Anggraini A , Azka A 
Published: December 2022

AbstractFreshwater mussel (Pilsbryoconchasp.) shells have a proportion of 51.93%, which is included in the solid waste resulting from the processing of mussels. In fact, mussel shells are rich in minerals, especially high calcium, with a calcium content of 39.55%. So innovation is needed so that the utilization of mussel shells is maximized. One way is through the valorization of mussel shells into products with high added value. This study aimed to determine the physicochemical characteristics of the CaO (calcium oxide) extract of freshwater mussel shells. Valorization of mussel shells into calcium oxide (CaO) flour by calcination method at 1000°C temperature. The test parameters were yield, functional groups using the FTIR instrument, macro (calcium, potassium, magnesium, phosphorus) and micro minerals (Manganese, zinc, iron, and sodium) using the AAS instrument. The results showed that the physicochemical characteristics of calcium oxide (CaO) flour from the shell of the freshwater mussel (Pilsbryoconchasp.) included: the proportion of shell 51.90%, the proportion of meat and viscera 48.10%; CaO yield of 56.47%; identified the Ca-O group at a wavelength of 1 661, 1 409, 1 116, and 875 cm-1; and dominated by calcium content of 76.27% to potential as a calcium precursor in the synthesis of hydroxyapatite.
Processing and Utilization of Natural Phospholipids from Fish Belly Fat Waste of Jambal Siam Fish (Pangasius Hypophthalamus)
Authors: Ilza M , Diharmi A 
Published: December 2022

Abstract
Phospholipids are used for food products, drug formulas, stabilizers, lubricants, cosmetics, pharmaceuticals, and emulsifiers. Synthetic phospholipids tend to be utilized for food and medicinal purposes, but nowadays consumer concern has shifted to phospholipids from natural ingredients. Phospholipids have functional properties towards health, consumer often requires phospholipids containing certain fatty acids such as omega 3. The purpose of this research is to process the belly fat waste of jambal siam fish into phospholipids and purify the phospholipids that are already obtained. The results showed that the highest saturated fatty acid content in jambal siam fish belly oil was palmitic acid which was expected to dominate the structure of phosphatidylglycerol, phosphatidic acid, and cardiolipin. The highest content of unsaturated fatty acids is oleic acid which was expected to dominate phosphatidylinositol, phosphatidyl ethanolamine, and phosphatidylcholine structure. The highest phospholipid content was phosphotidylcholine, followed by phosphatidylglycerol, diphosphatidylglycerol, phosphatidylethanolamine, and phosphatidylinositol. The hexane solvent produced a higher soluble hexane unsaturated fatty acid fraction than the insoluble hexane fraction, especially omega 6 and omega 9. While acetone produced higher levels of oleic acid and omega 3 soluble acetone, which was higher than the insoluble acetone. The higher the level of purity of phospholipids, the higher the content of oleic acid and omega 3.
First Report of Argulus Ectoparasite from Koto Panjang Reservoir, Indonesia
Authors: Budijono B , Kamaruddin E , Harjoyudanto Y , Windarti W , Fauzi M , Riauwaty M , Alfinda R 
Published: December 2022

Abstract
Carp cultivation has been going on for a long time in the Koto Panjang Reservoir and the type of Argulus ectoparasite in this fish culture has not been reported. This initial research study aims to identify the morphology and characterize the DNA of the Argulus species in this reservoir. This research can be used as initial information material for the management of aquaculture fish health and early warning against water quality degradation. Argulus surveys were carried out on carp parent cages with coordinate positions 0°16′46.7” North and 100°51”26.2” East. Argulus specimens were collected from live and dead carp bodies (body surface, gills, operculum, caudal fin, pectoral fin, anal fin, pelvic fin, base of tail, and abdomen) using a spatula and stored in 96% ethanol for identification using standard literature and DNA barcoding techniques. The research results obtained 115 specimens of the genus Argulus from 49 live goldfish (2800-4900 mm and 200-1800 g) and 3 goldfish that died ± 3-4 days which were characterized by white gills and white mucus lumps between the scales. DNA characterization revealed that the name of this fish lice species (Argulus) could not be determined and had a close relationship with Argulus japonicus Shizuoka-2019 with an identity value of 79.22%.
Characteristics of Young Mangrove (Sonneratia alba) Leaf Extract as A Biosalt Preparation
Authors: Sari N I , Sidauruk S W , Dewita D , Ananda N T 
Published: December 2022

Abstract
Mangrove (Sonneratia alba) leaves contain bioactive compounds, macro and micro minerals, and NaCl content. However, the potential of the young mangrove leaves has not been explored. This research aimed to determine the characteristics of young mangrove leaf extract as a biosalt preparation. The sample used in this research was young mangrove leaves extracted using aquadest with 1:5 ratio. The parameters were tested for yield, moisture content, ash content, the mineral content of Natrium and Kalium, Na:K ratio, and NaCl content. The results showed that the biosalt characteristics of the mangrove leaf extract consisted of a brown appearance with a salty flavor, 6.96% yield, 5.07% moisture, 36.59% ash, 1.27 Na:K ratio, and 19.53% NaCl. Based on the NaCl content, the resulting biosalt required the dietary salt quality standard according to Standard National Indonesia of dietary salt.
Analysis of crab fisherman’s household structure and livelihood strategy after the Kendari Bay revitalization
Authors: Limi M A , Ningsih S R , Fyka S A , Syarni P , Hidrawati  , Dewi H S , Attamimi U 
Published: December 2022

Abstract
The study determines the structure and strategy of livelihood and household welfare of crab fishermen after the revitalization of Kendari Bay. Determination of the research area is done purposively. The population and sample in this study were fishermen who persisted in using Kendari Bay as a location for catching crabs after the sedimentation and reclamation of Kendari Bay to meet family needs. The data analysis used is qualitative analysis to determine the strategy and structure of fishermen’s livelihood and quantitative research to assess household welfare by calculating fishermen’s income which will be compared with the regional minimum wage. The results showed that the livelihood structure of crab fishermen consisted of on-farm (fishery sector) as mud crab fishermen and non-farm (non-fishery sector) as construction workers, company workers, and the wages for ship work that were carried out erratically every month. The crab fisherman’s livelihood strategy is a double income pattern where the fisherman and his wife work in the non-fishery sector to meet their household needs and migrate by mobility or moving to other areas outside the Kendari Bay coast. The income of crab fishermen from catching crabs in Kendari Bay (fishery sector) is IDR2.379.859 and working in the non-fishery sector is IDR1.319.375. Hence, the total household income of crab fishermen is IDR3.699.234, higher than the minimum wage of Kendari City in 2022, IDR2.823.315, so the crab fishing households are still categorized as prosperous.
Sustainability Status of Baung Fish in Public Waters, Kampar Regency, Riau Province
Authors: Pradini U R , Arief H 
Published: December 2022

Abstract
This study aims to assess the sustainability status of the utilization of baung fish (Mystus nemurus) in the public waters of Kampar Regency. The study was conducted in January 2022 in the public waters of Kampar Regency. The data used consists of primary data and secondary data, while the analysis was carried out by RAPFISH method. The dimensions used in this study consist of ecological, economic, social, institutional and technological. The results of the analysis show that the utilization of baung fish resources in the public waters of Kampar Regency is less sustainable with a multidimensional index value of 46.21 percent. The sustainability status in this less sustainable category requires the intervention of stakeholders in management can warrant the sustainability of baung fish in Kampar Regency.
Incongruent gray matter atrophy and functional connectivity of striatal subregions in behavioral variant frontotemporal dementia
Authors: Li Huizi , Xiong Lingchuan , Xie Teng , Wang Zhijiang , Li Tao , Zhang Haifeng , Wang Luchun , Yu Xin , Wang Huali 
Published: December 2022

Abstract
Previous studies on the striatum demonstrated that it is involved in the regulation of cognitive function and psychiatric symptoms in patients with behavioral variant frontotemporal dementia (bvFTD). Multiple lines of evidence have shown that striatal subregions have their own functions. However, the results of the existing studies on striatal subregions are inconsistent and unclear. In this study, we found that structural imaging analysis revealed that the bvFTD patients had smaller volumes of striatal subregions than the controls. We found that the degree of atrophy varied across the striatal subregions. Additionally, the right striatal subregions were significantly more atrophic than the left in bvFTD. Functional imaging analysis revealed that bvFTD patients exhibited different changed patterns of resting-state functional connectivity (RSFC) when striatal subregions were selected as regions of interest (ROI). The RSFC extending range on the right ROIs was more significant than on the left in the same subregion. Interestingly, the RSFC of the subregions extending to the insula were consistent. In addition, the left dorsolateral putamen may be involved in executive function regulation. This suggests that incongruence in striatal subregions may be critical to the bvFTD characteristics.