bluuebunny/crossref_metadata_2025_split huggingface dataset:
PENGARUH KETERAMPILAN MEMBUAT VARIASI STIMULUS GURU TERHADAP HASIL BELAJAR SISWA PADA MATA PELAJARAN EKONOMI DI SMA YAPIM BIRU-BIRU
Authors: Nurjannah Meia Dania Br. Saragih, Herdi, Samio, 
Published: June 2023

Tujuan dari penelitian ini adalah untuk mengetahui seberapa besar Pengaruh Keterampilan Membuat Variasi Stimulus Guru Terhadap Hasil Belajar Siswa Pada Mata Pelajaran Ekonomi Di SMA Yapim Biru-Biru. Jenis penelitian ini ialah metode penelitian kuantitatif. alat pengumpulan data berupa tes dan dokumentasi. Populasi dan sampel penelitian ini 86 orang siswa yang terdiri dari 3 kelas paralel. Teknis analisis data yang digunakan dalam penelitian ini adalah menggunakan uji regresi linider sederhana dengan menggunakan persamaan : Y = a + bX. Hasil penelitian menunjukkan bahwa koefisien antara variabel ketrampilan membuat variasi stimulus guru (X) dengan prestasi belajar siswa (Y) sebesar 0,357 dengan koefisien determinasi (r2) sebesar 0,127. Melalui uji persamaan regresi yang telah dilakukan ternyata diperoleh t hitung = 1,49 sedangkan nilai t tabel = 1,385. Oleh karena t hitung (1,49) > t tabel (1,385), hal ini menunjukkan bahwa terdapat pengaruh yang signifikan antara ketrampilan membuat variasi stimulus guru terhadap hasil belajar ekonomi siswa dengan bentuk hubungan linier dan prediktif melalui garis regresi Ŷ = 8,06 + 0,14X.
PENGARUH MOTIVASI BERPRESTASI TERHADAP HASIL BELAJAR EKONOMI
Authors: Dinda Suci Tamimi, Cita Ayni Putri Silalahi  
Published: June 2023

Dalam kehidupan sehari-hari, bukanlah merupakan kegiatan yang terjadi begitu saja, akan tetapi selalu ada faktor yang mendorong individu untuk berbuat guna mencapai tujuan. Faktor yang mendorong individu untuk berbuat guna memenuhi tujuannya tersebut disebut dengan motivasi. Motivasi akan timbul jika manusia menyadari akan kebutuhannya, sehingga manusia akan berusaha untuk memenuhi kebutuhan tersebut. Menurut Gerungan (2013:56) ada beraneka macam kebutuhan manusia yang selalu ingin dipenuhi. Salah satu kebutuhan manusia tersebut diantaranya adalah kebutuhan akan pendidikan dan pengajaran. Proses pendidikan dan pengajaran tidak pandang bulu dan dijalani oleh semua usia, baik yang tua apalagi yang muda. SMA Muhammadiyah 7 Serbelawan sebagai salah satu lembaga pendidikan formal dengan para guru sebagai pendidik mempunyai peranan yang sangat penting dalam memberikan bimbingan belajar di sekolah kepada anak didik. Dengan belajar di sekolah, secara sadar atau tidak anak mempunyai suatu tujuan guna memenuhi kebutuhannya yakni kebutuhan untuk memperoleh hasil belajar yang baik sebagaimana yang diinginkannya. Dalam setiap aktititas anak-anak untuk memenuhi kebutuhan tersebut sudah barang tentu tidak terlepas dari berbagai faktor pendorong (motivasi) guna mencapai tujuan tersebut. Rumusan masalah dalam penelitian ini adalah : "Apakah ada pengaruh antara motivasi berprestasi dengan hasil belajar ekonomi pada siswa kelas XI SMA Muhammadiyah 7 Serbelawan TA. 2021/2022", dengan rumusan hipotesis : "Apakah ada pengaruh motivasi berprestasi dengan hasil belajar ekonomi pada siswa kelas XI SMA Muhammadiyah 7 Serbelawan TA. 2021/2022". Populasi dalam penelitian ini adalah seluruh siswa kelas XI SMA Muhammadiyah 7 Serbelawan yang berjumlah 116 orang yang terdiri dari 3 lokal, dengan pengambilan sampel dilakukan secara acak terstruktur, yaitu seluruh siswa kelas XI IPS yang berjumlah 40 orang siswa. Dari hasil analisa data menggunakan uji parsial (uji t) diperoleh besarnya nilai t(hitung) sebesar 3,19 dan besarnya nilai t(tabel) dk (40-2) = 38 pada a = 0,05 yaitu 1,390. Hal ini bermakna bahwa persamaan regresi Ŷ = 68,03 + 4,91X adalah berarti. Dengan demikian dari hipotesis yang dirumuskan, maka hipotesis yang diterima adalah Hipotesis alternative (Ha) yaitu : Ada pengaruh antara Motivasi berprestasi (X) terhadap Hasil Belajar (Y) diterima kebenarannya, sebab nilai t(hitung) > dari nilai t(tabel) atau 3,19 > 1,390 dengan memberikan sumbangan efektif sebesar 12,60%.
PENDAMPINGAN PEMANFAATAN MAGGOT BSF DAN IMPLEMENTASI RECIRCULATING AQUACULTURE SYSTEM DALAM BUDIDYA LELE
Authors: Sari Dewi Hambar , Juniatmoko Ronnawan , Purbowati Dwi 
Published: June 2023

Artikel ini melaporkan kegiatan pengabdian kepada masyarakat yang yang bertujuan meningkatkan pengetahuan dan keterampilan peserta dalam memanfaatkan maggot black soldier flies (BSF) dan implementasi recirculating aquaculture system (RAS) untuk meningkatkan efektivitas dan efisiensi proses budidaya lele bagi kelompok budidaya lele di Desa Mojo. Pengabdian dilakukan melalui 2 kegiatan, 1) pendekatan community based research (CBR) dengan melakukan 3 variasi budidaya lele, yaitu T0 (pakan lele komersial, tanpa RAS), T1 (pakan lele komersial + maggot BSF, tanpa RAS), dan T2 (pakan lele komersial + maggot BSF, dengan RAS); 2) Diseminasi hasil CBR. Hasil menunjukkan bahwa budidaya lele dengan maggot BSF + pakan lele komersial yang dikombinasikan dengan implementasi RAS mampu menurunkan biaya pakan dan efektif dalam menjaga kualitas air budidaya. Melalui kegiatan ini, peserta memiliki pengetahuan dan keterampilan awal dalam memanfaatkan maggot BSF dan RAS dalam budidaya lele.Selain itu, pada kegiatan pelatihan dan diseminasi hasil, peserta terlihat antusias mengikuti kegiatan. This article reports community service activities aimed to increase participants’ knowledge and skills in utilizing the BSF larvae and implementing the recirculating aquaculture system (RAS) to increase the effectiveness and efficiency of the catfish farming process for the catfish farming group in Mojo Village. We carried out two main activities, 1) a community-based research (CBR) activity by conducting three variations of catfish farming, namely T0 (commercial catfish feed, without RAS), T1 (commercial catfish feed + BSF larvae, without RAS), and T2 (commercial catfish feed + BSF larvae, with RAS); 2) Dissemination of CBR results. The results show that catfish farming with BSF larvae + commercial catfish feed combined with RAS implementation can reduce feed costs and effectively maintain aquaculture water quality. Through this activity, participants acquire initial knowledge and skills in utilizing BSF larvae and implementing RAS in catfish farming. The participants enthusiastically participated in the training activities and dissemination of the results.
Cannabis seeds (Cannabis sativa L.) as a source of irreplaceable food components
Authors: Верещагін І.В. , Кандиба Н.М. 
Published: June 2023

The article presents the results of the analysis of literature sources that contain research data on the fatty acid composition of hemp oil (Cannabis sativa L.). Today, sown hemp is confidently occupying a segment of the food market, increasing the range. From ancient times the hemp was used as a source of fiber, from which woven garments were made, and the seeds were eaten. Later, nutritious oil was extracted from the seeds of the crop in the areas of hemp growing.
In the twentieth century, researchers noticed to hemp oil and described in detail its fatty acid composition. The presence of polyunsaturated acids (ώ-3), in particular linolenic, in hemp oil puts the crop among the most valuable. A whole complex of other fatty acids was also found, such as palmitic, palmitoleic, stearic, oleic, linolenic, γ-linolenic, arachidonic, behenic, lignoceric, and others. According to various authors, modern varieties of hemp, both domestic and foreign selection, are characterized by different ratios of fatty acids in the oil, with unsaturated acids predominating. Linoleic, linolenic and arachidonic fatty acids (or vitamin F) prevent the deposition of cholesterol in the arteries, ensure healthy skin and hair, have a positive effect on the activity of the endocrine glands, help reduce body weight by burning saturated fats. These fatty acids are a source of formation in the body of biologically active substances ‒ prostaglandins. Especially valuable in hemp oil is the presence of linoleic, linolenic and gamma-linolenic acids. These important acids are found in large quantities in nature quite rarely. In the quantitative composition of the ratio of glycerides of these acids in hemp oil 3 : 1 (56 linoleic and 19 % linolenic). The most important physiological action of polyunsaturated fatty acids is a strong antisclerotic effect, the ability to lower blood cholesterol, reduce growth and even resorb atherosclerotic plaques. The use of α-linolenic acid prevents the oxidation of cell membrane lipids, insulin resistance, promotes normal fetal development, growth processes, proper development of the brain, visual organs, gonads, improves the biochemistry of the nervous system, synapses, nerve impulse transmission, brain blood pressure and blood cholesterol levels. The article also covers the agronomic characteristics of hemp fruit, as well as the peculiarities of lipid formation processes.
Development of biological control of oriental fruit moth and insect immune response induced by entomopathogenic fungi
Authors: Цао Жішан , Власенко В.А. , Лі Увейхай 
Published: June 2023

The oriental fruit moth, Grapholita molesta (Busck) is a key pest of tree fruit of Europe, Asia, America, Africa, Australia, and New Zealand, which makes a big damage to apple trees, pear tree and the stone fruit of the peach, plum, apricot, nectarine, cherry and so on. It is difficult to control these pests with traditional chemical methods meanwhile with the increasing demand for food safety, biological control method to this pest has attracted more and more people's attentions. Beauveria bassiana is one of the most studied and applied entomopathogenic fungi, can infected and kill the oriental fruit moth as a biological control agent. The entomopathogenic fungi with a wide range hosts and they are harmless to the environment, human and animal. Using entomopathogenic fungi to control pests has many advantages and they have been an important part in biological control of pests, although it still has some natural defects, such as long effective time and easy to be affected by environmental conditions. In order to make good use of it in the future, it is necessary to deeply understand their living conditions and infection mechanism to insects. Entomopathogenic fungi can invades the insects from the body wall through contact directly, but also can through the digestive tract, stomata and wounds and other ways into the insect body. But insects have evolved a strong innate immune system to protect themselves from infection by the pathogens and adverse conditions. When insects are infected by entomopathogenic fungi, their innate immune system will firstly be activated. And the insects will resist the infection by their immune response, which will lead to the reduction of infection efficiency and the control effect. So, it is necessary to study the immune response of insects introduced by entomopathogenic fungi, and it is a hotspot in pest control. This article summarized the occurrence and control technologies of oriental fruit moth, and the research status of entomopathogenic fungus (B. bassiana), finally it summarized the insect immune response induced by entomopathogenic fungi. This will provide a significantly deepened the understanding on mechanisms of insect and entomopathogenic fungi. And it prospected the improvement of effective on biological control of oriental fruit moth by B. bassiana, which provide a theoretical basis for supply better services to plant protection in the future.
Reaction of very early and early mature varieties of potatoes to the external conditions of the north-eastern Forest-Steppe of Ukraine by productivity
Authors: Кравченко Н.В. , Бутенко Є.Ю. , Києнко З.Б. , Собран В.М. 
Published: June 2023

The article presents the results of a study on the reaction of very early and early ripening commercial varieties of potatoes in the north-eastern forest-steppe of Ukraine in terms of productivity. The experiments were performed according to accepted and tested methods. Extremely high value of potato varieties in general and early ripening in particular to meet the needs of people rich in starch, essential amino acids, vitamins and macro-and micronutrients, which can be available to people for a long time.
There is a significant impact on the implementation of productivity among the very early varieties of external factors. With very few exceptions: Prada in 2019 and 2020 and Riviera in 2019 and 2020 did not match the rank of varieties.
According to the average three-year data, the very early variety Riviera was characterized by maximum productivity, but it also had the highest value of the coefficient of variation of the trait. Although the Duma variety was inferior to the mentioned variety in terms of average productivity, the value of the coefficient of variation is almost twice less.
The worst external conditions for the implementation of productivity in very early varieties were in 2020, which in absolute terms is 1.6 times less than in 2018 and 1.2 times than in 2019. The most favorable for the manifestation of productivity between the early varieties Madison and Tauras were in 2018, Shchedryk and Palace ‒ in the next, and Beo and Tauras ‒ in 2020, although the absolute value was different, respectively, 620 and 630 g/nest, 800 and 780 g/nest and 518 and 522 g/nest.
According to weighted average data, the best conditions for the realization of productivity among early-maturing varieties were found in 2019 (428 g/nest), and the worst – in 2020 (221 g/nest). The maximum value of the coefficient of variation of productivity over the years took place in the early varieties of Latona and Alliance, respectively, 94.9 and 93.4 %. The opposite was true for the Red Scarlet variety ‒ 7.8 % and some others.
Quantitive changes of enzyme activity in wheat induced by Streptomyces sp. Strain HU2014
Authors: Чжу Хонгксю , Чжоу Фенг , Рожкова Т.О. 
Published: June 2023

Biocontrol microorganism have a diverse range of activities and they have been focused on potential biocontrol agents in agriculture. They can induce plant defensed response and enhance plant disease resistance. Streptomyces sp. produce active metabolites that can inhibit the growth of phytopathogens. Induced resistance is usually indicated by the activity of Peroxidase (POD), Polyphenoloxidase (PPO), and Phenylalanine ammonia-lyase (PAL) or other defense enzymes. The related reports mainly focused on disease control or promoting growth of cash crops or vegetables, but less on wheat presently. Moreover, the information about the concentration of fermentation broth and mycelia of Streptomyces affected the quantitative changes of defensed enzyme activities is limited. In this study, we started from isolating a Streptomyces strain, named S. sp. strain HU2014, and demonstrated (POD), (PPO), (PAL) enzymes in different concentration of the mycelia (M) and extracellular filtrate (EF) of the strain with the application of soil drench treatment. The enzyme activities were determined by visible spectrophotometry. The results showed that the activities of POD and PAL at the concentration of 103-fold dilution of the EF increased significantly to some extent in comparison with untreated control, by 173.86 % (P < 0.05) and 71.92 % (P < 0.05), respectively. In the range of different concentration of the M, POD and PPO activities were enhanced with the increasing of dilution ratio, but the difference was not significant. It is expected to be an excellent resource for the development of new biological preparations.
Job Satisfaction, Workplace Spirituality, and Organizational Citizenship Behavior and Their Impact on Employee Performance at PT Bukit Makmur Mandiri Utama
Authors: Syahrial Ryan Alif , Tanuwijaya Justine 
Published: June 2023

This study aimed to determine the effect of job satisfaction, workplace spirituality, and organizational citizenship behaviar for emplooye perfomance. This research uses a quantitative approach method, and the sample is taken using purpose sampling technique with the population being employees from all jobsite of companies in PT Bukit Makmur Mandiri Utama (BUMA). Data collection was done online using Google Forms and resulted in 233 responses that could be used. The results showed that four from three hypotheses were supported. The results obtained from this study are expected to benefit company management in analysze and mapping the level of job satisfaction, workplace spirituality, and organizational citizenship behaviour for emplooye performance.
Glutathione affinity chromatography for the scalable purification of an oncolytic virus immunotherapy from microcarrier cell culture
Authors: Swartz Andrew R. , Shieh Yvonne , Gulasarian Amanda , Curtis Erik , Hofmann Carl F. , Baker Jack B. , Templeton Neil , Olson Jessica W. 
Published: June 2023

Therapeutic viral vectors are an emerging technology with several clinical applications in gene therapy, vaccines, and immunotherapy. Increased demand has required the redevelopment of conventional, low-throughput cell culture and purification manufacturing methods such as static cell stacks and ultracentrifugation. In this work, scalable methods were investigated for the manufacture of an oncolytic virus immunotherapy application consisting of a prototype strain of coxsackievirus A21 (CVA21) produced in adherent MRC-5 cells. Cell culture was established in stirred-tank microcarrier bioreactors, and an efficient affinity chromatography method was developed for the purification of harvested CVA21 through binding of the viral capsids to an immobilized glutathione (GSH) ligand. Bioreactor temperature during infection was investigated to maximize titer, and a decrease in temperature from 37°C to 34°C yielded a two–three-fold increase in infectivity. After purification of the 34°C harvests, the GSH affinity chromatography elution not only maintained a &gt;two-fold increase in infectivity and viral genomes but also increased the proportion of empty capsids compared to 37°C harvests. Using material generated from both infection temperature setpoints, chromatographic parameters and mobile phase compositions were studied at the laboratory scale to maximize infectious particle yields and cell culture impurity clearance. Empty capsids that co-eluted with full capsids from 34°C infection temperature harvests were poorly resolved across the conditions tested, but subsequent polishing anion exchange and cation exchange chromatography steps were developed to clear residual empty capsids and other impurities. Oncolytic CVA21 production was scaled-up 75-fold from the laboratory scale and demonstrated across seven batches in 250 L single-use microcarrier bioreactors and purified with customized, prepacked, single-use 1.5 L GSH affinity chromatography columns. The large-scale bioreactors controlled at 34°C during infection maintained a three-fold increase in productivity in the GSH elution, and excellent clearance of host cell and media impurities was observed across all batches. This study presents a robust method for the manufacture of an oncolytic virus immunotherapy application that may be implemented for the scalable production of other viruses and viral vectors which interact with glutathione.
Relative contributions of arterial stiffness to cardiovascular disease risk score in Chinese women in framingham and China-PAR model
Authors: Jin Lin , Chen Jianxiong , Wu Lingheng , Zhang Mengjiao , Sun Jiali , Shen Cuiqin , Du Lianfang , Wang Dingqian , Li Zhaojun 
Published: June 2023

BackgroundArterial stiffness played an important role in the development of cardiovascular disease (CVD) events. The aim of this study was to verify the relative importance of arterial stiffness for different CVD risk scores in a large sample of Chinese women.MethodsWe measured arterial velocity pulse index (AVI) and CVD risk scores in 2220 female participants (mean age 57 years). Framingham Risk Score (FRS), and the prediction for Atherosclerotic Cardiovascular Disease Risk in China (China-PAR) were used to estimate CVD risk, respectively. The relationships between AVI and risk scores were investigated by linear regressions and restricted cubic spline (RCS) analysis. To determine the relative importance of AVI in predicting CVD risk scores, random forest analysis was used.ResultsThere was a significant positive correlation between AVI and FRS, China-PAR in all subgroup groups stratified by age, blood pressure and BMI. AVI showed higher importance in predicting CVD risk scores in FRS model, compared with these traditional risk factors. In China-PAR model, although AVI was not as predictive as SBP, it had better predictive power than many known risk factors such as lipids. Furthermore, AVI had significant J-shaped associations both with FRS and China-PAR scores.ConclusionsAVI was significantly associated with CVD risk score. In FRS and China-PAR model, AVI showed relatively high importance in predicting CVD risk scores. These findings may support the use of arterial stiffness measurements in CVD risk assessment.
MMV006087 is a potent Malaria Box compound against Plasmodium falciparum clinical parasites
Authors: Chirawurah Jersley D. , Adikah Bridget , Ansah Felix , Laryea-Akrong Elizabeth , Danwonno Harry , Morang’a Collins M. , Dosoo Daniel , Amenga-Etego Lucas , Awandare Gordon A. , Aniweh Yaw 
Published: June 2023

The emergence of drug-resistant malaria parasites to artemisinin and its partner drugs highlights the need to increase the arsenal of new antimalarials with novel mechanisms of action. To help achieve this aim, this study tested the potency of three Malaria Box compounds (MMV006087, MMV085203, and MMV008956) against five laboratory strains and twenty clinical isolates of Plasmodium falciparum using optimized in vitro growth inhibitory assays. The results were compared to the response from four standard antimalarials-artesunate, chloroquine, mefloquine, and halofantrine. From the results, MMV006087 was the most potent compound with an average IC50 of 22.13 nM compared to MMV085203 (average IC50 of 137.90 nM) and MMV008956 (average IC50 of 262.30 nM). On average, the laboratory strains were also less susceptible to the three Malaria Box compounds (average IC50 of 162.30 nM) compared to the clinical isolates (average IC50 of 135.40 nM). Additionally, MMV006087 was less potent than artesunate but twice more efficacious than chloroquine against the laboratory strains and clinical isolates. The data from this study validate the potency of MMV006087 and MMV085203 as promising antimalarials worthy of further exploration. This study further substantiates the need to include clinical isolates in antimalarial compound screening activities.
Convection of snow: when and why does it happen?
Authors: Jafari Mahdi , Lehning Michael 
Published: June 2023

Convection of water vapor in snowpacks is supposed to have a major impact on snow density and microstructure profiles with strong implications for the thermal regime and snow stability. However, the process has never been directly measured and only recently been simulated for idealized conditions. The analysis suggests that natural convection is not likely to happen in typical horizontally homogeneous polar or Alpine snow covers. This paper studies the potential impact of heterogeneity induced, e.g., by shrubs on convection of water vapor. We find that natural convection triggered by buoyancy occurs even with sub-critical Rayleigh number as low as 5 due to heterogeneity in snow density. This leads to complementing contributions of diffusive and convective flux divergence on snow density changes. The combined effect of diffusion and convection helps to generate the often-observed low density foot and high-density top of, e.g., Arctic snowpacks. The strongest effect of convection is not for very thin or thick snow covers but for snow covers with thickness in the order of 0.5 m. This scale facilitates the development of convection cells. Further work should address the additional effects of sub-snow lateral temperature variations and assess the effect of convective vapor fluxes on snow microstructure.