bluuebunny/crossref_metadata_2025_split huggingface dataset:
Molecular Identification and Biotechnological Potential of Cerithidea cingulata-and Lottia scabra Associated Fungi as Extracellular Enzyme Producer and Anti-Vibriosis Agent
Authors: Trianto Agus , Radjasa Ocky Karna , Subagiyo Subagiyo , Isabella Armeilia Ardiva , Bahry Muhammad Syaifudien , Purnaweni Hartuti , Djamaludin Rignolda , Tjoa Aiyen , Singleton Ian , Evans Darren Mark , Diele Karen 
Published: May 2023

Mangroves are complex, unique, and dynamic ecosystems that host organisms that have special physiological adaptations to fluctuations in salinity, temperature, and pH. Gastropods have an important role in the mangrove ecosystem for food cycles and webs by helping to provide nutrients and micro-habitats for microbes. Micro-fungi isolated from mangrove ecosystems are productive sources of enzymes and bioactive compounds such as antibacterial and antifungal. In this study a explored the enzymatic and anti-vibrio activity of fungi associated with the marine gastropod Cerithidea cingulata and Lottia scabra. collected in three mangrove forests in North Sulawesi, Indonesia. The fungi associated with the specimens were inoculated on malt extract agar (MEA) using the tapping method. Enzymatic and anti-vibrio assays were conducted applying the plug method. Positive effects of the fungal compounds on Vibrio were indicated by clear zones formed around the isolates. A total of 13 fungal species were isolated from C. cingulata (19MB-C5 and 19MBa-A4) and L. scabra (19MT-07 and 19MT-18). Most fungal isolates have moderate growth rate. The isolate with highest cellulolytic, proteolytic, and anti-vibriosis activity (Vibrio parahaemolyticus, V. harveyi, V. vulnificus, and V. alginolyticus), derived from C. cingulata 19MB-C5 was closely related to Aspergillus niger, as revealed by molecular analysis using the universal primers ITS1 and ITS4 (similarity value 99%). A. niger 19MB-C5-3 has potential as a bioremediation and anti-vibrio agent that can be applied in aquaculture.
Why Not Just Backtest?
Authors: Samsa Greg 
Published: May 2023

Backtesting involves applying an investment strategy or predictive model to historical data in order to assess its performance. Here, we apply general statistical principles to the question of whether, when and why backtesting is likely to be successful. Our use case is the JP Morgan Equity Income Fund (JEPI), an exchange-traded fund whose investment strategy is advertised to be supported by artificial intelligence, including backtesting. One problem with backtesting stock returns is that suitable external datasets to use in assessing model performance are difficult to identify. Another problem is that the modeling process can lack a clear separation between the training and test samples. Neither of these sources of bias are fixed by using big data analytics. An implication of these difficulties is that the performance of AI-derived predictive models is likely to be overestimated, even in the presence of backtesting. Moreover, backtesting will not fully assess how well a predictive model generalizes to other circumstances. The results of backtesting should not be taken at face value. Modelers are encouraged to explicitly describe what is being assumed for an investment strategy to continue to perform.
Statistical Success: Three-Year Analysis of Student Performance and Student Insights from a First-Year College Statistics Course
Authors: Harris Jennifer D. 
Published: May 2023

This study included quantitative and qualitative analysis of three years of students in an introductory college-level statistics course. The quantitative analysis focused on what aspects might be relevant to student success. The instructor and the modality appear to be significantly related to student success. Somewhat surprisingly, fully onsite courses had a lower success rate than online or partially online courses. The qualitative analysis focused on the student comments on end of course surveys for the same three years. These comments were categorized based on topic and then rated from -3 reflecting a strong negative feeling, through to +3 indicating a strong positive feeling. These comments highlighted the importance students placed on live online lessons with the instructor. Students also appeared to take responsibility for their learning, noting the importance of their engagement to their success. This study provided unique insights to student success in an introductory college-level statistics course. Instructor and student engagement is key, along with opportunities for live connections.
Interaction of nucleoporins with nuclear transport receptors: a structural perspective
Authors: Kehlenbach Ralph H. , Neumann Piotr , Ficner Ralf , Dickmanns Achim 
Published: May 2023

Abstract
Soluble nuclear transport receptors and stationary nucleoporins are at the heart of the nucleocytoplasmic transport machinery. A subset of nucleoporins contains characteristic and repetitive FG (phenylalanine-glycine) motifs, which are the basis for the permeability barrier of the nuclear pore complex (NPC) that controls transport of macromolecules between the nucleus and the cytoplasm. FG-motifs can interact with each other and/or with transport receptors, mediating their translocation across the NPC. The molecular details of homotypic and heterotypic FG-interactions have been analyzed at the structural level. In this review, we focus on the interactions of nucleoporins with nuclear transport receptors. Besides the conventional FG-motifs as interaction spots, a thorough structural analysis led us to identify additional similar motifs at the binding interface between nucleoporins and transport receptors. A detailed analysis of all known human nucleoporins revealed a large number of such phenylalanine-containing motifs that are not buried in the predicted 3D-structure of the respective protein but constitute part of the solvent-accessible surface area. Only nucleoporins that are rich in conventional FG-repeats are also enriched for these motifs. This additional layer of potential low-affinity binding sites on nucleoporins for transport receptors may have a strong impact on the interaction of transport complexes with the nuclear pore and, thus, the efficiency of nucleocytoplasmic transport.
MUHAMMAD NATSIR’S THOUGHT ON CORRELATION OF RELIGION AND STATE
Authors: Wahab Wisyly 
Published: May 2023

The wish of Muhammad Natsir is just how to realize Indonesia as independent, peaceful, prosperous, and just state. So, its logic if he given a nickname as leader of freedom who integrates with the other, Soekarno, in exterminating colonizer – Dutch colonization. Although they are in difference of opinion, but still in building communication each other openly.Muhammad Natsir rejects secularism against state as implemented by movement of Kamal Attaturk in Turkish. He said that Islam is not only merely a religion but also a philosophy of life which covers political aspects, economy, social and culture. Islam doesn’t separate between religion and state, but its primary one. ( D.P. Sati Alimin, 1957: h. IX ) Lesson of the story can become evidence of reflection and understood that in political field the different opinon doesn’t bring enmity, but its mercy and as development of democracy dynamics. Muhammad Natsir consistently refuses all thoughts that weaken existence of Islam in state such as he opposes Soekarno’s nationalism ideas. This reality is indicated that Muhammad Natsir is a prominent leader of Islam nationalist since the age of Dutch colonization. He is also one of speakers and mediators of his group in verious cases that relate Islam and mankind, namely the correlation between religion and state. Beside that, Natsir’s ability integrates His view with his nationalism paradigm, and how then it becomes important one to be studied and thought of its struggle values for next Moslem generation. Actually, the above matter still becomes roof nowdays. It can be proven and indicated by appearing Moslem thinkers and secular thinkers whom they raise voice to fight for their each idea. Even though, deliberation about the correlation of religion and state still can’t be solved untill now. For that reason, this writing is expected as necessary one to be committed.
Compressive behaviour of alkali-activated slag-based concrete and Portland cement concrete incorporating novel multiple hooked-end steel fibres
Authors: Rossi Laura , Patel Ravi A. , Dehn Frank 
Published: May 2023

AbstractThis study investigates the effect of single and multiple hooked-end steel fibres on the mechanical properties of alkali-activated slag-based concrete (AASC) and compares its performance with a similar strength-grade Portland cement concrete (PCC). Three different fibre geometries, i.e. single (Dramix® 3D), double (Dramix® 4D) and triple hooked-end (Dramix® 5D) steel fibres, and three different volume fractions, i.e. 0.25%, 0.50% and 0.75% are considered. Compressive strength, modulus of elasticity and stress–strain response under uniaxial compression are evaluated. Hooked-end steel fibres have a limited effect on the compressive strength and modulus of elasticity of both AASC and PCC, regardless of fibre geometry and content. Although hooked-end steel fibres improve the compressive stress–strain behaviour of both composites, higher enhancement of peak stress, corresponding strain and post-peak response is observed for fibre-reinforced AASC (FRAASC) mixtures. To predict the stress–strain response under uniaxial compression of steel FRAASC a new analytical model is proposed and calibrated using an extensive dataset of experimental stress–strain curves available in the literature for both steel fibre-reinforced PCC and AASC. This model can predict the compressive stress–strain behaviour of FRAASC using the compressive peak stress and corresponding strain of the unreinforced matrix and the steel fibre reinforcing index ($${\mathrm{RI}}_{\mathrm{v}}$$

RI
v

) as inputs and provides excellent results when validated against the data obtained in this study for FRAASC.
Ekstraksi Antosianin Limbah Terung Belanda (Solanum betaceaum Cav.) Menggunakan Metode Microwave Assisted Extraction
Authors: Ulya Darajatul , Husna Nida El , Novita Melly 
Published: May 2023

Abstrak. Terung belanda (Solanum betaceaum Cav.) yang terdiri dari bagian kulit, daging buah dan biji mengandung pigmen antosianin yang dijadikan sebagai pewarna alami. Ekstraksi antosianin limbah terung belanda dilakukan menggunakan metode Microwave Assisted Extraction (MAE) yang memanfaatkan gelombang mikro untuk mempercepat ekstraksi selektif melalui pemanasan singkat. Tujuan penelitian ini adalah untuk mempelajari pengaruh jenis limbah terung belanda dan lama ekstraksi menggunakan metode MAE terhadap rendemen dan total antosianin ekstrak limbah terung belanda. Penelitian menggunakan Rancangan Acak Kelompok (RAK) Faktorial dengan 2 faktor. Faktor I adalah jenis limbah yang terdiri dari 3 taraf (kulit, biji, campuran kulit dan biji) dan faktor II adalah lama ekstraksi yang terdiri dari 3 taraf (30 detik, 40 detik dan 50 detik). Hasil penelitian menunjukkan bahwa rendemen ekstrak berkisar antara 8,00– 9,83%. Jenis limbah yang menghasilkan total antosianin tertinggi hingga terendah adalah limbah biji, campuran kulit dan biji dan limbah kulit. Berdasarkan total antosianin kombinasi perlakuan terbaik diperoleh pada jenis limbah biji dan lama ekstraksi 30 detik menghasilkan rendemen 9% dan total antosianin 121,46 mg/L.Abstract. Tamarillo (Solanum betaceaum Cav.) which consists of the skin, pulp and seeds contain anthocyanin pigments are used as natural dyes. Anthocyanin extraction of tamarillo was done using the method of Microwave Assisted Extraction (MAE) which utilizes microwaves to accelerate the selective extraction through a brief warm. The purpose of this research is to study the influence of the type of tamarillo waste and extraction time used MAE method on yield of extract and total anthocyanin. The study used a randomized block design (RAK) factorial with two factors. The first factor is the type of tamarillo consists of 3 levels (skins, seeds and mixture of skin and seed) and the second factor is extraction time consists of 3 levels (30 seconds, 40 seconds and 50 seconds). The results showed that the yield of extract anthocyanin ranged from 8.00 to 9.83%. Types of tamarillo waste that generate total anthocyanin highest to lowest are seed, mixture of seeds and skin, and skin. Based on the total anthocyanin, the best treatments was obtained on seed waste and extraction time of 30 seconds that resulted yield of extrac 9.00%, and total anthocyanin 121.46 mg / L.
Faktor-Faktor Yang Mempengaruhi Produksi Pinang Di Kecamatan Labuhan Haji Timur Kabupataen Aceh Selatan
Authors: Asrar Kaspul , Zakiah Zakiah , Makmur Teuku 
Published: May 2023

ABSTRAK. Tujuan dari penelitian ini adalah untuk mengetahui apakah faktor luas lahan, modal, dan tenaga kerja berpengaruh nyata terhadap produksi pinang di Kecamatan Labuhanhaji Timur Kabupaten Aceh Selatan. Penelitian ini dilakukan di Kecamatan Labuhanhaji Timur Kabupaten Aceh Selatan, Lokasi penelitian dipilih secara sengaja (purposive). Ruang lingkup penelitian ini terbatas pada faktor luas lahan, modal, dan harga yang berhubungan dengan produksi pinang. Populasi dalam penelitian ini sebanyak 160 orang yang diambil dari tiga desa di kecamatan tersebut yaitu desa Gunung Rotan, Keumumu Hilir, dan desa Keumumu Seberang. Sedangkan besarnya sampel yang digunakan dalam penelitian ini adalah 30% dari total populasi penelitian. Model analisis yang digunakan adalah fungsi produksi regresi linier berganda. Hasil analisis koefisiensi determinasi ( R² ) diperoleh nilai sebesar 0,791 yang berarti bahwa luas lahan, modal, dan harga mempengaruhi produksi pinang sebesar 79,1%, sedangkan sisanya 20,9% dipengaruhi oleh faktor lain. Hasil analisis secara serempak (uji-f) bahwa faktor luas lahan, modal, dan tenaga kerja berpengaruh nyata terhadap produksi pinang di Kecamatan Labuhanhaji Timur Kabupaten Aceh Selatan. Analisis secara parsial (uji-t) menyatakan bahwa faktor luas lahan dan modal, dan tenaga kerja berpengaruh nyata terhadap produksi pinang.ANALYSIS OF FACTORS AFFECTING THE PRODUCTION IN THE DISTRICT LABUHANHAJI PINANG EAST DISTRICT OF SOUTH ACEHABSTRACT. The purpose of this study was to determine whether the factors of land, capital, and labor significantly affect nut production in Sub Labuhanhaji South East Aceh district. This research was conducted in the District Labuhanhaji South East Aceh district, Research location selected intentionally (purposive). The scope of this study is limited to the factors of land, capital, and prices associated with nut production. The population in this study as many as 160 people were taken from three villages in the district, the village of Mount Rotan, Keumumu Hilir and Seberang Keumumu village. While the sample size used in this study was 30% of the total study population. The analysis model is the production function of linear regression. The results of the analysis coefficient of determination (R ²) obtained a value of 0.791, which means that the area of land, capital and nut prices affect the production of 79.1%, while the remaining 20.9% is influenced by other factors. Results of analyzes simultaneously (test-f) that the factors of land, capital, and labor significantly affect nut production in Sub Labuhanhaji South East Aceh district. Partial analysis (t-test) states that the factors of land and capital, and labor significantly affect nut production.
Pengaruh Penambahan Limbah Pulp Kopi dan Lama Fermentasi Terhadap Mutu Bokasi
Authors: Putra Donny Heansyah , Muzaifa Murna , Irfan Irfan 
Published: May 2023

Abstrak : Bokasi adalah pupuk organik yang dapat dibuat menggunakan bahan atau limbah organik seperti kotoran hewan, abu sekam, serbuk gergaji dan dedak. Pada daerah penghasil kopi seperti Dataran Tinggi Gayo – Kabupaten Aceh Tengah, pulp kopi merupakan limbah yang sangat potensial untuk dijadikan sebagai bahan baku dalam pembuatan bokasi. Penelitian ini menggunakan Rancangan Petak Terpisah (RPT). Petak utama adalah persentase pulp kopi (A) yang terdiri dari 4 taraf yaitu: A1 =0%, A2 = 15%, A3 = 30%, dan A4 = 45%. Anak petak adalah lama fermentasi (F) yang terdiri dari 3 taraf yaitu F1 = 0 hari, F2 = 10 hari, dan F3 = 16 hari. Bokasi dibuat dengan penambahan mikroorganisme lokal (MOL) sebanyak 2.5% yang dibuat dari limbah buah pepaya, pisang dan air cucian beras. Analisis total mikroba, temperatur, unsur N, dan uji pertumbuhan tanaman dilakukan pada masing-masing satuan percobaan. Hasil penelitian menunjukkan bahwa limbah pulp kopi dapat dimanfaatkan dalam pembuatan bokasi hingga proporsi 30% dari jumlah bahan baku bokasi. Hal ini dapat dilihat dari tingginya jumlah mikroba (21,30 CFU/ml), unsur N (1.19%), unsur C, Rasio C/N, Temperatur, Ph, dan suhu akhir fermentasi bokasi (31.53oC). Selain itu, berdasarkan uji pertumbuhan tanaman, proporsi ini juga lebih baik dibandingkan dengan satuan percobaan lainnya, bokasi standard, maupun top soil.THE EFFECT OF ADDITION OF COFFEE PULP AND OLD FERMENTATION ON QUALITY OF BOKASI Abstract : Bokashi is an organic fertilizer that can be made using organic materials or wastes such as animal waste, husk ash, sawdust and bran. In coffee-producing areas like the Gayo Highlands - Central Aceh District, coffee pulp is a potential waste to be used as a raw material for bokashi making. This research used Split Plot Design. The main plot was the percentage of coffee pulp (A) consisting of 4 levels which were A1 = 0%, A2 = 15%, A3 = 30%, and A4 = 45%. The subplot was the fermentation length (F) consisting of 3 levels which were F1 = 0 days, F2 = 10 days, and F3 = 16 days. Bokashi was made with the addition of local microorganisms (MOL; 2.5%) which was made from papaya fruit waste, banana and rice washing water. Total microbial analysis, temperature, N elements, and plant growth test were performed on each experimental unit. The results showed that coffee pulp waste can be utilized in bokashi making up to 30% proportion of bokashi raw material amount. This can be seen from the high number of microbes (log 21,30 CFU/ml), N elements (1.19%), elements C, Ratio C/N, pH, temperatur and the final temperature of bokashi fermentation (31.53 °C). In addition, based on plant growth test, this proportion is also better than other unit of experiment, standard bundle, and top soil.
Analisis Faktor-Faktor Yang Mempengaruhi Permintaan Beras Ketan di Pasar Induk Lambaro Kabupaten Aceh Besar
Authors: Ningsih Dewi Rahmalia , Indra Indra , Romano Romano 
Published: May 2023

The aims of research to identify factors that affect the demand for glutinous rice in Pasar Induk Lambaro District of Aceh Besar, to analyze the elasticity of demand for glutinous rice in Pasar Induk Lambaro Kabupaten Aceh Besar, and to identify glutinous rice based on the type of goods.The location of research was done by purposive sampling, has this study done in accidental sample, with a total sample of 30. The data used are primary data (consumen) in Pasar Induk Lambaro District of Aceh Besar through direct interviews using questionnaires. This study uses regression analysis of log linear regression. The result of analysis showed that the factors that influence the demand for price of glutinous rice, and situational is month of Hajj was significantly, price of black glutinous rice, income of household, and quantity of household members were not significant. Based on the value of elasticity is 2,952 showed elastic, based on cross elasticity is 0,411 showed positive value meaning that black glutinous rice is substitution product of glutinous rice and the income elasticity is 0,536 showed glutinous rice is normal product, meaning that the demand for glutinous rice will go up when income rises also. Keywords: Demand, Glutinous rice, Elasticity.
Analisis Metode Kebutuhan Kapur pada Ultisol dan Hubungannya dengan Sifat Kimia Tanah dan Pertumbuhan Jagung (Zea mays L.)
Authors: Amelia Dini , Muyassir Muyassir , Khalil Munawar 
Published: May 2023

Abstrak. Metode perhitungan kebutuhan kapur merupakan teknik menentukan banyaknya kapur yang diperlukan pada tiap-tiap hektar tanah dengan tujuan peningkatan pH atau tujuan lainnya. Beberapa metode yang digunakan pada penelitian ini adalah metode Corey, Al-dd dan metode Knooti. Sedangkan jenis kapur yang digunakan terdiri atas kalsit, dolomit dan gypsum. Hasil analisis dari masing-masing kombinasi perlakuan antara metode perhitungan kebutuhan kapur dan jenis kapur yang berbeda, menyebabkan terjadinya dinamika sifat kimia Ultisol dan pertumbuhan tanaman jagung yang bervariasi. Kalsit yang dihitung dengan metode Al-dd menghasilkan sifat kimia tanah yang lebih baik dari jenis kapur yang dihitung dengan metode perhitungan lainnya, demikian juga halnya dengan pertumbuhan jagung yang ditanam pada Ultisol.
Kajian Pembuatan Bubuk Serai Dapur (Cymbopogon citratus) dengan Kombinasi Suhu dan Lama Pengeringan
Authors: Shadri Syifaush , Moulana Ryan , Safriani Novi 
Published: May 2023

Abstrak. Tanaman serai merupakan tanaman herbal yang sering dijumpai sekitar perkarangan rumah atau kebun-kebun di Aceh. Tujuan penelitian adalah untuk mengetahui pengaruh suhu dan lama pengeringan terhadap mutu bubuk serai dapur yang dihasilkan. Hasil penelitian ini juga diharapkan dapat menjadi acuan dalam pengolahan serai dapur menjadi bumbu dan meningkatkan nilai ekonomis dari serai dapur (Cymbopogon citratus) serta dapat mempermudah pemanfaatan serai ke dalam masakan. Penelitian ini dilakukan dengan menggunakan Rancangan Acak Kelompok (RAK) faktorial dengan 2 faktor yaitu suhu pengeringan (S) dan lama pengeringan (W). Faktor 1 yaitu suhu pengeringan (S) terdiri atas 3 taraf meliputi S1= 40°C, S2= 50°C, dan S3= 60°C. Faktor kedua yaitu lama pengeringan (W) terdiri atas 2 taraf yaitu W1=24 jam, dan W2=48 jam. Produk yang dihasilkan selanjutnya dianalisis kadar air, kadar abu, total flavonoid, aktivitas antioksidan, dan organoleptik (hedonik) untuk warna dan aroma. Hasil penelitian menunjukkan bahwa perlakuan terbaik yang ditentukan berdasarkan uji organoleptik hedonik adalah kombinasi perlakuan lama pengeringan 48 jam dan suhu pengeringan 60°C (W2S3) dengan kadar total flavonoid 7,03% dan aktivitas antioksidan 46,67 %. Abstact. Lemongrass is one of herbs that are often found around home garden or plantation field in Aceh. The purpose of this research was to find out the influence of temperature and drying time to the quality of the generated lemongrass powder. The results of this study are also expected to be a reference in the processing of lemon grass into spices and increase the economic value of lemongrass kitchen (Cymbopogon citratus) and can facilitate lemongrass into the dish. This research was done by using factorial Randomized Block Design (RAK) with 2 factors ie drying temperature (S) and drying time (W). The first Factor was drying temperature (S) consisted of 3 levels of S1 = 40°C, S2 = 50°C, and S3 = 60°C. The second factor was the drying time (W) consisted of 2 levels of W1 = 24 hours, and W2 = 48 hours. The resulting product was then analyzed for water content, ash content, total flavonoid, antioxidant activity, and organoleptic (hedonic) for color and aroma. The results showed that the best treatment was W2S3 treatment (combination between 60oC and 48 hours drying) with a total flavonoid level of 7.03% and an antioxidant activity of 46.67%. This was determined based on organoleptic (hedonic) test.