bluuebunny/crossref_metadata_2025_split huggingface dataset:
Deteksi Total Bakteri Escherichia coli Pada Sedimen Laut Perairan Desa Padelegan Sebagai Indikator Cemaran Mikrobiologis Wisata Pantai The Legend-Pamekasan
Authors: Asih Eka Nurhema Ning , Ramadhanti Annisa , Wicaksono Ashari , Dewi Kartika , Astutik Sri 
Published: February 2024

Escherichia coli tergolong bakteri fecal coliform yang merupakan kelompok bakteri patogen sebagai indikator pencemaran mikrobiologi air. Tingginya jumlah bakteri tersebut di perairan Desa Padelegan diduga disebabkan oleh tekanan pencemaran dalam rumah tangga. Penelitian ini dilakukan untuk mengetahui kualitas bakteriologis khususnya bakteri Escherichia coli yang terakumulasi pada sedimen perairan Desa Padelegan terkait dengan keselamatan operasional kawasan wisata pantai The Legend di sekitar lokasi. Metode yang digunakan untuk analisis total bakteri Escherichia coli mengacu pada SNI 2332.1:2015. Hasil penelitian menunjukkan nilai total bakteri Escherichia coli pada 7 stasiun berkisar antara <3,0 MPN/g - 93 MPN/g. Total bakteri Escherichia coli pada seluruh stasiun tersebut berada di bawah ambang batas untuk keperluan wisata bahari sesuai Keputusan Menteri Negara Lingkungan Hidup No. 51 Tahun 2004 yaitu <200 MPN/g dengan toleransi <10%. Nilai analisis total bakteri Escherichia coli menunjukkan bahwa kualitas perairan khususnya sedimen di sekitar Desa Padelegan berada pada kategori masih baik dan aman untuk kegiatan wisata bahari. Escherichia coli is classified as Fecal coliform bacteria which is a group of pathogenic bacteria as an indicator of water microbiological contamination. The high total number of these bacteria in the waters of Padelegan Village is thought to have come from the pressure of domestic contamination. This study was conducted to determine the bacteriological quality, especially Escherichia coli bacteria that accumulate in the sediments of the waters of Padelegan Village related to the safety of operating beach tourism areas The Legend around the location. The method used for the total analysis of Escherichia coli bacteria refers to SNI 2332.1:2015. The results showed that the total value of Escherichia coli bacteria at 7 stations ranged from <3.0 MPN/g - 93 MPN/g. The total Escherichia coli bacteria at all of these stations were below the threshold for marine tourism purposes according to the Decree of the State Minister for the Environment No. 51 of 2004, namely <200 MPN/g with a tolerance of <10%. The value of the total analysis of Escherichia coli bacteria shows that the quality of the waters, especially the sediments around the village of Padelegan, is in the category that is still good and safe for marine tourism activities.
Suplementasi Ekstrak Spirulina sp. Pada Pakan Meningkatkan Toleransi Post-Larva L. vannamei Terhadap Stres Salinitas
Authors: Lestari Raisha Fahmida Dwi , Yudiati Ervia , Djunaedi Ali 
Published: February 2024

Litopenaeus vannamei merupakan komoditas yang bernilai ekonomi tinggi pada sektor perikanan dan budidaya. Spirulina sp. merupakan mikroalga yang mengandung nutrisi tinggi dan senyawa potensial yang memiliki efek terapeutik. Penelitian ini bertujuan untuk mengetahui pengaruh suplementasi ekstrak Spirulina sp. dalam pakan terhadap tingkat kelangsungan hidup, pertumbuhan, dan tingkat kelangsungan hidup L. vannamei pada uji stres salinitas. Hewan uji yang digunakan adalah post-larvae (PL 8) L. vannamei dengan bobot rata-rata 0,002 g/ekor. Penelitian ini menggunakan metode Rancangan Acak Lengkap (RAL) yang terdiri atas 3 konsentrasi, yaitu 3 mg/kg (SP 3), 6 mg/kg (SP 6), dan 9 mg/kg (SP 9) serta satu kontrol dengan masing-masing 4 pengulangan. L. vannamei dipelihara dan diberi pakan suplementasi Spirulina sp. selama 14 hari. Pada akhir penelitian dilakukan uji stres salinitas dengan menggunakan tabung falcon yang masing-masing diisi 20 ekor PL dan dipaparkan pada akuades (45 mL) dan ditutup rapat. PL diamati dan dihitung jumlah kelulushidupannya setiap 10 menit. Waktu pengamatan dihentikan ketika kematian udang mencapai 50%.Hasil penelitian menunjukkan bahwa pemberian suplementasi ekstrak Spirulina sp. pada pakan tidak berpengaruh nyata (p>0,05) terhadap pertumbuhan dan tingkat kelangsungan hidup udang. Namun, perlakuan SP 9 menunjukkan pengaruh nyata (p<0,05) terhadap tingkat kelangsungan pada uji stres salinitas. Suplementasi ekstrak Spirulina sp. mampu meningkatkan toleransi L. vannamei terhadap stres salinitas. Litopenaeus vannamei is high economically viable cultivate in the aquaculture sectors. Spirulina sp. is high nutrients microalgae and potential compound that have therapeutic effects. This study aims to determine the effect of dietary supplementation of Spirulina sp. on feed towards survival rate, growth, and resistance of L. vannamei in the salinity stress test. This experiment was using post-larvae (PL 8) (0.002 g/ind). This study used a completely randomized design (CRD) consisting of 3 concentrations, namely 3 mg/kg (SP 3), 6 mg/kg (SP 6), and 9 mg/kg (SP 9), and one control with 4 repetitions for each treatment. L. vannamei was reared and fed with Spirulina sp. supplementation for 14 days. On stress salinity test, PL were put in the falcon tube filled with aqua dest with 20 PL each and exposed until 50% mortality. The results showed that the supplementation of Spirulina sp. on feed had no significant effect (p>0.05) on the growth and survival rate of shrimp. However, the SP 9 treatment showed a significant effect (p<0.05) on the survival rate in the salinity stress test. Is concluded that supplementation of Spirulina sp. in the diet managed to increase the resistance of L. vannamei toward stress salinity.
Karakteristik Sarang Peneluran Penyu Lekang (Lepidochelys olivacea) di Pantai Jeen Yessa, Papua Barat - Indonesia
Authors: Hasanah Arifatul , Kolibongso Duaitd , Lontoh Deasy 
Published: February 2024

Pantai Jeen Yessa merupakan salah satu tempat bertelur bagi beberapa spesies penyu di Pasifik Barat, dengan sekitar 75% peneluran terjadi di pantai utara semenanjung Bentang Laut Kepala Burung di wilayah Abun, Papua Barat. Wilayah ini memiliki karakteristik suhu yang tinggi dan kelembaban yang rendah. Kedua faktor tersebut memainkan peran penting dalam keberhasilan reproduksi. Penelitian ini merupakan salah satu studi pertama mengenai karakteristik morfologi sarang penyu lekang (L. olivacea) di Pantai Jeen Yessa, dan diharapkan dapat memberikan kontribusi terhadap pengetahuan regional mengenai spesies ini serta membantu dalam pengelolaan perlindungan setempat. Survei ini dilakukan di tiga lokasi selama musim bertelur pada Mei-Juli 2022. Karakteristik sarang L. olivacea: rata-rata bagian atas sarang 30 ± 5,41 (rata-rata ± SD) cm (kisaran 20 - 43 cm, n = 34); bagian bawah sarang 42 ± 5,14 (rata-rata ± SD) cm (kisaran 32 - 54 cm, n = 34); dan lebar sarang 27,3 ± 4,87 (rata-rata ± SD) cm (kisaran 18 - 38 cm, n = 34). Masa inkubasi antara kedua lokasi bervariasi: Warmamedi 62,5 hari ± 4,5 dan Batu Rumah 48,7 hari ± 1,8 (rata-rata ± SD). Rata-rata keberhasilan penetasan adalah 78,3%, dan tingkat kematian 21,7% (jumlah telur yang dihitung = 2.367). Penelitian lebih lanjut mengenai metode inkubasi buatan sangat disarankan, karena ini bisa menjadi pilihan penting untuk melestarikan populasi penyu. Jeen Yessa Beach is one of the nesting sites for several turtle species in Western Pasific, with approximately 75% of nesting occurring on the northern coast of the Bird’s Head Seascape peninsula in the Abun region of West Papua. This region is characterized by high temperatures and low humidity. Both factors play an important role in reproductive success. This is one of the first studies on the morphological characteristics of the nest of the olive ridley turtle (L. olivacea) on the Jeen Yessa beach, and it is expected to contribute to regional knowledge of this species and aid in local protection management. The survey was conducted in three locations during the nesting season in Mei-July 2022. L. olivacea nest characteristics: average nest top 30 ± 5.41 (mean ± SD) cm (range 20 – 43 cm, n = 34); nest bottom 42 ± 5.14 (mean ± SD) cm (range 32-54 cm, n = 34); and a nest width of 27.3 ± 4.9 (mean ± SD) cm (range 18 – 38 cm, n = 34). The incubation period between the two sites varies: Warmamedi 62.5 days ± 4.5 and Batu Rumah 48.7 days ± 1.8 (mean ± SD). The average hatching success was 78.3%, and the mortality rate was 21.7% (eggs counted = 2,367). More research into artificial incubation methods is recommended, as this could be an important option for preserving some sea turtle populations.
Penambahan Sorbitol Terhadap Karakteristik Edible Straw dari Karagenan
Authors: Savitri Nadiah Humairoh Mufidah , Sedjati Sri , Ridlo Ali 
Published: February 2024

Pemakaian sedotan plastik tidak hanya mencemari lingkungan namun juga dapat menyebabkan kematian pada hewan laut. Pemecahan masalah sedotan plastik telah dilakukan dengan mengganti bahan sedotan agar mudah terurai atau dapat dimakan (edible). Bahan yang telah digunakan untuk membuat edible straw misalnya karagenan yang diekstraksi dari rumput laut. Karagenan yang diekstraksi dari rumput laut Kappaphycus alvarezii paling banyak diproduksi dibandingkan jenis rumput laut lainnya. Kappa karagenan merupakan jenis karagenan hasil ekstraksi K. alvarezii dengan tingkat kemurnian tinggi. Penelitian ini bertujuan untuk mengetahui pengaruh penambahan plasticizer sorbitol terhadap karakteristik edible straw yang meliputi kuat tarik, kelarutan, dan ketebalan. Konsentrasi karagenan yang digunakan dalam penelitian ini sebanyak 1,5% pada setiap perlakuan. Metode penelitian menggunakan Rancangan Acak Lengkap (RAL) yang terdiri atas 4 kelompok perlakuan yaitu sorbitol 0% (ESS0), sorbitol 2% (ESS2), sorbitol 4% (ESS4), dan sorbitol 6% (ESS6). Hasil penelitian menunjukkan bahwa semakin tinggi penambahan sorbitol, maka kuat tarik semakin rendah namun kelarutan dan ketebalan meningkat. Formulasi terbaik didapatkan pada penambahan sorbitol 2% (ESS2) dengan kuat tarik 6,364 Mpa, kelarutan 41%, dan ketebalan 749,6 µm. The use of plastic straws not only pollute the environment but also cause death to marine animals. Solving the problem of plastic straws has been done by changing the straw material so that it is easily decomposed or edible. Materials that have been used to make edible straws, for example, carrageenan extracted from seaweed. Kappa Carrageenan is a type of carrageenan extracted from Kappaphycus alvarezii seaweed with a high purity level. This study aims to determine the effect of the addition of sorbitol plasticizer on the characteristics of edible straws which include tensile strength, solubility, and thickness. The carrageenan concentration used in this study was 1.5% for each treatment. The research method used a completely randomized design (CRD) which consisted of 4 treatment groups, namely 0% sorbitol (ESS0), 2% sorbitol (ESS2), 4% sorbitol (ESS4), and 6% sorbitol (ESS6). The results showed that the higher addition of sorbitol, lower the tensile strength, but the solubility and thickness increased. The best formulation was obtained by adding 2% sorbitol (ESS2) with tensile strength of 6,364 MPa, solubility of 41%, and thickness of 749,6 µm.
Influence of modified starches on mental performance and physical activity following an exhaustive bout of exercise
Authors: Herman Callie , Sandri Heidner Gustavo , Wentz Laurel M. , Shaver Alexandra A. , Murray Nicholas P. 
Published: February 2024

AbstractSlow‐releasing carbohydrates may delay the effects of fatigue after exhaustive exercise. The purpose of this study was to observe the influence that hydrothermally modified starches (HMS) and traditional maltodextrin (MAL) supplements had on physical endurance and mental performance following exhaustive exercise. Male participants completed a VO2max and 2 days of cycling sessions using a Velotron ergometer. Cycling sessions were performed at 70% of the VO2max workload for 150 min. Supplements were consumed 30 min before cycling and during exercise at the 120‐min mark (1 g CHO/kg body weight). Brain activity was measured using a Neuroscan 64‐channel electroencephalogram cap. Go‐no‐go and N‐back tasks were performed before and after cycling bouts. Blood glucose, lactate, ketones, and urine‐specific gravity were measured before, during, and after cycling. VO2and rate of perceived exertion were recorded in 15‐min intervals. Ketones increased significantly more for HMS than MAL from pre‐ to postcycling measurements (p < 0.05). Reaction times for go‐no‐go and N‐back were faster for HMS postexercise. Event‐related potential differences were present in both mental tasks following exhaustive exercise. HMS supplementation decreased the impact of cognitive and physical fatigue postexercise.
Analytical performance specifications for combined uncertainty budget in the implementation of metrological traceability
Authors: Panteghini Mauro 
Published: February 2024

Abstract
In addition to the correct implementation of calibration traceability, the definition and fulfillment of maximum allowable measurement uncertainty (MAU) are essential in assuring that laboratory measurements are clinically usable. Across the entire calibration hierarchy, three major contributors to the measurement uncertainty (MU) budget are identified, starting with the higher-order reference providers, extending through the in vitro diagnostic (IVD) manufacturers and their processes for assigning calibrator values, and ending with medical laboratories generating the random variability of results reported to clinicians. To understand if it is possible to achieve MAU and, consequently, to fix the possible drawbacks, the definition of combined MU budget limits across the entire calibration hierarchy has a central role. In particular, quality specifications for MU of reference and commercial calibrator materials should be defined according to the MAU on clinical samples. All involved stakeholders (i.e., higher-order reference providers, IVD manufacturers, medical laboratories) should be prepared to improve their performance whenever the clinical application of the test is made questionable by the failure to achieve MAU.
LADM procedure to find the analytical solutions of the nonlinear fractional dynamics of partial integro-differential equations
Authors: Khan Qasim , Khan Hassan , Kumam Poom , Tchier Fairouz , Singh Gurpreet 
Published: February 2024

Abstract
Generally, fractional partial integro-differential equations (FPIDEs) play a vital role in modeling various complex phenomena. Because of the several applications of FPIDEs in applied sciences, mathematicians have taken a keen interest in developing and utilizing the various techniques for its solutions. In this context, the exact and analytical solutions are not very easy to investigate the solution of FPIDEs. In this article, a novel analytical approach that is known as the Laplace adomian decomposition method is implemented to calculate the solutions of FPIDEs. We obtain the approximate solution of the nonlinear FPIDEs. The results are discussed using graphs and tables. The graphs and tables have shown the greater accuracy of the suggested method compared to the extended cubic-B splice method. The accuracy of the suggested method is higher at all fractional orders of the derivatives. A sufficient degree of accuracy is achieved with fewer calculations with a simple procedure. The presented method requires no parametrization or discretization and, therefore, can be extended for the solutions of other nonlinear FPIDEs and their systems.
Sparks of New Metaphysics and the Limits of Explanatory Abstractions
Authors: Hauer Thomas 
Published: February 2024

Abstract
Physical reality as an explanatory model is an abstraction of the mind. Every perceptual system is a user interface, like the dashboard of an aeroplane or the desktop of a computer. We do not see or otherwise perceive reality but only interface with reality. The user interface concept is a starting point for a critical dialogue with those epistemic theories that present themselves as veridical and take explanatory abstractions as ontological primitives. At the heart of any scientific model are assumptions about which things exist, how they are related, and how we can know them. Scientific models take our knowledge beyond ordinary experience toward explanatory abstractions. The main problem with veridical models lies in why we cannot express our theories and the explanatory abstractions associated with them other than through classical perceptual interface symbols. This study analyses the limits, possibilities and constraints of explanatory abstractions.
Topological edge and corner states in coupled wave lattices in nonlinear polariton condensates
Authors: Schneider Tobias , Gao Wenlong , Zentgraf Thomas , Schumacher Stefan , Ma Xuekai 
Published: February 2024

Abstract
Topological states have been widely investigated in different types of systems and lattices. In the present work, we report on topological edge states in double-wave (DW) chains, which can be described by a generalized Aubry-André-Harper (AAH) model. For the specific system of a driven-dissipative exciton polariton system we show that in such potential chains, different types of edge states can form. For resonant optical excitation, we further find that the optical nonlinearity leads to a multistability of different edge states. This includes topologically protected edge states evolved directly from individual linear eigenstates as well as additional edge states that originate from nonlinearity-induced localization of bulk states. Extending the system into two dimensions (2D) by stacking horizontal DW chains in the vertical direction, we also create 2D multi-wave lattices. In such 2D lattices multiple Su–Schrieffer–Heeger (SSH) chains appear along the vertical direction. The combination of DW chains in the horizonal and SSH chains in the vertical direction then results in the formation of higher-order topological insulator corner states. Multistable corner states emerge in the nonlinear regime.
Facile synthesis of MnO2 nanoparticles for the removal of cationic dye
Authors: Gowthami Pushparaj , Susi Kumar Subramanian Rohith , Kalaiarasi Giriraj , Kosiha Arumugam , Priya Lakshminarayanan Srimathi , Mahmoud Mohamed H. , Fouad Hassan , Ansari Abuzar 
Published: February 2024

Abstract
MnO2 NPs were synthesized from Delonix elata leaves extract act as a capping and reducing agent by green synthesis process. The synthesized MnO2 NPs were characterized by different spectroscopic techniques such as IR, UV-Vis, SEM and XRD analyses. The UV spectrum of synthesized MnO2 NPs revealed optical properties at 340 nm. The XRD pattern of MnO2 NPs exhibited the crystallite size to be in the range of 20 nm and shows the amorphous structure. The morphological geographies of MnO2 NPs are spherical and faintly agglomerated. The FT-IR spectrum of MnO2 NPs spectacles stretching vibration of Mn–O at 510 cm−1 confirmed the formation of MnO2 NPs. MnO2 is superior photo degradation for methylene blue which is extant in the textile industries and it has an unlimited potential application in wastewater treatment.
The Influence of Online Attendance System and Work Discipline on The Performance of Educational Staff in Universitas Negeri Semarang
Authors: Pujirahayu Endang Retno , Sutikno Sutikno , Hidayat Nur 
Published: February 2024

This research is aimed at understanding the influence of the online attendance system and work discipline on the performance of educational staff at Universitas Negeri Semarang (UNNES). The sampling technique employed in this research is random sampling, where the researcher randomly took samples without considering the variety of the population’s background. There were 140 (20%) Educational Staff in UNNES taken as the samples of this research. This research features a quantitative approach where the primary data were obtained from surveys through questionnaires distributed to the respondents. The data analysis and processing utilised the regression equation in the SPSS, a statistics software.
The problems underlying this research are formulated as follows: Do the online attendance system and work discipline significantly influence the performance of educational staff in Universitas Negeri Semarang?
The result shows that the main factor influencing employees' work performance in UNNES is work discipline. The implementation of an online attendance system has minimum influence on employees’ performance. Online attendance systems, followed by work discipline, directly had a more significant impact than merely the online attendance systems.
Sorption Of Rare Metal Ions by Ionite Based on Diglycidyl Thiourea and Various Amines
Authors: Eshkurbonov F.B. , Safarova E.R. , Ismoilov B.Y. 
Published: February 2024

The article studies the process of sorption of molybdenum and vanadium ions on anion exchangers obtained on the basis of thiourea, epichlorohydrin and various amines. Various amines (urea, guanidine, melamine, polyethylene polyamine, ethylenediamine, etc.) are used as substances containing ionic groups. The regularities of ion exchange and the main properties of the tested anionites are given, the influence of the pH of the medium and interfering ions in the process of sorption of molybdenum and vanadium ions are studied. For vanadium, the use of empirical partition relations and of an extended Freundlich equation were tested, with promising results. The objective of this paper is to investigate the use of the pH dependent Freundlich model of Gustafsson et al., for describing vanadate(V) sorption to 26 mineral soils (all having less than 12% organic C), and to discuss the possible use of the model for risk assessments. The kinetic curves of the sorption process, the values of the diffusion coefficients for the initial periods of molybdenum sorption are given. In particular, the distribution coefficient of the radiotracers of 99Mo and 131I as homologs of Sg and Ts using the surface modification of chabazite was investigated as liquid-solid system in the present study. The kinetics of molybdenum sorption was carried out under static conditions from an ammonium molybdate solution with a concentration of 1 g/L for molybdenum ions and at pH 4.5–5. Under the same conditions, molybdenum ions are sorbed much faster by the DGT + M anion exchanger in comparison with AN-2F anion exchangers, in which the diffusion coefficient is much lower. The static exchange capacity (SEC) was determined in industrial solutions in the presence of mineral acids (hydrochloric, sulfuric and nitric), usually contained in them. The obtained kinetic equilibrium parameters of the tested anion exchangers were compared with those of industrial polycondensation anion exchangers, such as AN-2F and AN-1.