bluuebunny/crossref_metadata_2025 huggingface dataset:
Advantages, effectiveness and efficiency of using neodymium nanoparticles by 3d finite element method (FEM) as an optothermal human cancer cells, tissues and tumors treatment under synchrotron radiation
Authors: Heidari Alireza , Schmitt Katrina , Henderson Maria , Besana Elizabeth
Published: March 2024

In the current study, thermoplasmonic characteristics of Neodymium nanoparticles with spherical, coreâ€“shell and rod shapes are investigated. In order to investigate these characteristics, interaction of synchrotron radiation emission as a function of the beam energy and Neodymium nanoparticles were simulated using 3D finite element method. Firstly, absorption and extinction cross sections were calculated. Then, increases in temperature due to synchrotron radiation emission as a function of the beam energy absorption were calculated in Neodymium nanoparticles by solving heat equation. The obtained results show that Neodymium nanorods are more appropriate option for using in optothermal human cancer cells, tissues and tumors treatment method.Â Â Â Scanning Electron Microscope (SEM) image of Neodymium nanoparticles with 50000x zoom.Â Â
Mechanical stability criterions of cubic Na2He up to 500 GPa
Authors: Daoud Salah , Rekab-Djabri Hamza
Published: March 2024

The Cauchy pressure Cp was usually used to explain the atomic bonding character in a compound, while the mechanical stability criterions are usually used to study the stability of the structure under external compression. Using the elastic constants reported recently by Zahidur Rahaman et al. in Chinese Journal of Physics, 56 (2018) 231-237, as well as different mathematical formula, we reported on the Cauchy violation and the generalized mechanical stability criterions of cubic Na2He compound under high hydrostatic compression from 100 GPa to 500 GPa. For pressures ranging from 100 to 500 GPa, all values of both Cauchy pressure Cp and the generalized mechanical stability criteria G are negative. In addition we calculated the Debye temperature θD of Na2He compound using Siethoff’s approach. The results obtained are slightly lower than those obtained from the Debye approach reported by Zahidur Rahaman et al.
A GIS-based modified frequency ratio model for gold potential mapping in Kelantan Malaysia
Authors: S. Aliyu N. , A. Adebisi M. , J. Ataman O. , Mathew T. , Suleiman O.
Published: March 2024

Mineral system factors control the distributions of orogenic gold deposits in our immediate geological environment. The spatial knowledge of the relationship between the mineral factors and the gold deposits are crucial to locating these deposits in the environment. However, there is a current challenge in understanding the spatial correlation between ore genesis factors and orogenic deposits. Our paper analysed the spatial relationship between ore controlling factors and orogenic gold deposits in the Gua Musang area Kelantan, Malaysia. The procedure applied a modified frequency ratio model (MFR) to generate the gold potential map of the study area. The model relied on the spatial distribution of known gold deposits to predict new ones. Eight (8) known gold deposits and five (5) selected factors were used in the analysis. These factors include NE-SW lineaments, NW-SE lineament, host rock, heat source, alteration of iron and clay. The new findings show the factor with the highest predicting rate (Lineaments NE-SW) as the major gold deposits distribution factors within the study area. The created map highlight both known and new deposit locations. The area under curved (AUC) statistical graphs were used for the accuracy test. The results show 92.50% accuracy; thus, the approach is adaptable for gold mapping in Malaysia.
Extraction, characterisation, and assessment of the antioxidant activity of Salvia officinalis extracts
Authors: Jasim Abdul Razzaq D. , Omran Zahraa S . , Chiad Jamal S. , Rahi Firas Aziz , Hamad Moamer T. , Mohammed Sanaa S.
Published: March 2024

One of the biggest and most significant fragrant and medicinal genera in the Lamiaceae family is salvia (sage).  Sage infusion can have numerous health advantages, including anti-mycotic, anti-carcinogenic, antidiabetic, antibacterial, antioxidant, anti-inflammatory, and anti-proliferative effects.  By lowering free radicals, antioxidants are the chemical compounds that stop or post-pone the oxidation process. Lipid oxidation causes color changes, texture problems, odd flavors, nutrient loss, and the creation of hazardous chemicals. Aim of study evaluation of the activity of Salvia officinalis extracts as antioxidants. Investigated was the chemical detection of active substances. The existence of an active substances and the use of aqueous and alcoholic extracts separately for toxicity test in mice in three concentrations: (10, 20, and 40 %) it was given orally and the dose ranged between (0.1-0.2) ml twice a day. Leave the mice for 72 h with monitoring to determine the toxicity of the extracts or not, and evaluation of oxidative stress efficiency by using the DDPH method. The presence of these compounds in extracts of the sage plant, which are compounds that have an effectiveness against cancer cells, which lies in the removal of free radicals (OH. O) they contribute to protecting cells and tissues from active oxygen, The toxicity test results of the aqueous and alcoholic extract showed that they were free of toxicity after oral dosing of mice, The active compounds in the prepared extracts have different polarity, in addition to the use of two different solvents, (water and ethanol), which lead differing results of the effectiveness of the aqueous and alcoholic extracts as antioxidants compared to the gallic acid. The tests for the detection of the active groups of the extracts showed that they are affected by the nature of the solvent in terms of polarity, which affects the type and concentration of the groups extracted and the nature of the extraction, The toxicity test results showed that the aqueous and alcoholic extracts were non-toxic, the results of the antioxidant activity test showed that the alcoholic extract of the sage plant is more effective than the aqueous extract.
Seafloor morphology and potential gas hydrate distribution in the offshore Niger Delta
Authors: B Aminu Muslim , Samuel B Ojo
Published: March 2024

Bottom simulating reflectors (BSRs) and seismic pipe features have been used as proxies for defining the distribution of gas hydrate sediments in the offshore Niger Delta. This is the most extensive mapping of gas hydrate sediments in the Delta as of today. The seismic data merge comes from multiple surveys acquired with different parameters and seismic resolutions over the course of decades of oil and gas exploration in the region. Indicated gas hydrate distribution generally follows the structural fabric of the Niger Delta with BSRs occurring along the apexes of the thrust-related ridges that have bathymetric relief on the seafloor. The presence of swarms of seismic pipe features landwards of BSR locations suggests hydrates occur beyond BSR locations. The potential gas hydrates sediment acreage in offshore Niger Delta is 17600 sq-km, representing 20% of the area with a thickness of the gas hydrate stability zone reaching 440 m in the more outboard regions of the Delta. Total gas hydrates sediment coverage likely exceeds this value as BSRs become indistinguishable from sediment strata in regions of flat dips. The presence of double BSRs further suggests the presence of thermogenic gas hydrates in the region and allows to extend the thickness of the potential hydrate zone to 550 m in the outboard regions of the Delta.
The novel first-line therapy for rett syndrome
Authors: Sultan Wania , Irfan Hamza , Shariq Kainat
Published: March 2024

Rett Syndrome (RTT) is a neurodevelopmental disorder predominantly affecting females and characterized by hyperkinetic movement disorders and related symptoms. At present, the available treatments for RTT primarily focus on managing symptoms and providing supportive care. This article examines the emergence of trofinetide as an innovative therapeutic approach targeting the underlying molecular and synaptic abnormalities associated with RTT. The approval of trofinetide, marketed as DAYBUE™, as the primary treatment for Rett Syndrome by the US Food and Drug Administration (FDA) is based on encouraging outcomes from clinical trials. Ongoing open-label studies are currently underway to evaluate the long-term efficacy and safety of trofinetide in various age groups, thus providing valuable insights into its sustained benefits. These advancements in research, along with other potential treatments under investigation, offer promising prospects for the development of improved and personalized management strategies for individuals with Rett Syndrome.
The Role of Frailty Scores to Predict the Outcomes in Non Operative Treatment of Valgus Impacted Neck of Femur Fractures
Authors: Ali Mohammed , Neo Chryssa , Rajeev Aysha , Bhatnagar Sharad
Published: March 2024

Objectives: The management of valgus-impacted neck of femur fracture is controversial between operative and conservative treatments. This study aimed to investigate the usefulness of the Clinical frailty Score for predicting the prognosis of patients who underwent non-operative treatment for the valgus-impacted neck of femur fracture (NOF). Methods: A single-centred retrospective review of patients admitted with valgus impacted NOF. Data were collected from patients’ records, including demographics, Clinical Frailty Score (CFS), Nottingham Hip Fracture Score (NHFS) and Abbreviated Mental Test Score (AMTS). Patients were followed up to 24 months postoperatively. Results: Fifty-eight patients who were treated non-operatively with a mean follow-up of 2.6 years met our inclusion criteria. Twenty-nine patients failed the non-operative treatment and required replacement surgeries, while 29 had successful outcomes (50%). There were no differences between the two groups’ mean age and gender distributions (P 0.527 and 0.139, respectively). The successful group had significantly higher CFS (P 0.013), worse AMTS and higher mortality risk based on the NHFS (P 0.006 and P < 0.001, respectively). Conclusion: This study demonstrates that CFS, AMTS and NHFS can be used as predictors when considering non-operative treatment for the valgus-impacted neck of femur fracture. Patients who are frail, demented and high risk based on the NHFS have higher success rates with non-operative treatment.
Autopresentación online auténtica: ¿cómo medirla?, ¿está relacionada con la personalidad, la salud mental y la conducta en línea?
Authors: De la Iglesia Guadalupe , Castro Solano Alejandro
Published: March 2024

En este trabajo se analiza la autopresentación online auténtica (AOA): grado en que las personas se presentan de manera online de modo auténtico, sin distorsionar su modo de ser offline. Primero se diseñó una medida psicométrica para su operacionalización, y luego se estudió su asociación con aspectos psicológicos positivos (bienestar y satisfacción con la vida), negativos (síntomas psicológicos y uso problemático de internet) y rasgos de personalidad (normales, patológicos y positivos). Finalmente, se analizó un modelo explicativo en donde la AOA era mediadora entre la personalidad y aspectos psicológicos positivos. Se analizó una muestra de 384 participantes (46.6% hombres, 52.6% mujeres y 0.05% no binarios) con edad promedio de 28 años (DE = 5.92) y una muestra adicional para el análisis factorial confirmatorio de características similares. Se obtuvo buena evidencia de validez (e. g., CFI = .917, SMRS = .059) y confiabilidad (α = .79, ω = .85) para una medida de ocho elementos. La AOA se relaciona positivamente con el bienestar y la satisfacción con la vida, y negativamente con la sintomatología psicológica y el uso problemático de internet. Se encontraron asociaciones positivas con todos los rasgos positivos y con extraversión, agradabilidad y responsabilidad. Se hallaron relaciones negativas con desapego y desinhibición. Los rasgos positivos resultaron ser los más explicativos de la AOA. Se halló que la AOA media la relación entre el rasgo de integridad y la satisfacción con la vida y el bienestar. Se destaca el rol primordial de los rasgos positivos en este tipo de conducta online y con los aspectos positivos asociados a la AOA.
Florística, fitossociologia, estimativa de biomassa e sequestro de carbono em uma floresta de terra firme no Parque Ecológico de Gunma, Santa Bárbara, Pará, Brasil
Authors: Pimentel Edyrlli , Tavares de Paula Manoel , Herzog Viana Jéssica
Published: March 2024

Florestas urbanas são ambientes mitigadores para os efeitos adversos da urbanização crescente nas capitais brasileiras, no entanto, a urbanização agressiva promove a fragmentação desses ecossistemas, afetando a sua dinâmica e estrutura. Diante disso, os levantamentos da diversidade e estrutura de fragmentos florestais são fundamentais para auxiliar no conhecimento ecológico desses remanescentes. Nesse sentido, este estudo teve como objetivo realizar um levantamento florístico, fitossociológico, estimar a biomassa e o sequestro de carbono em uma floresta de terra firme na região metropolitana de Belém (PA). Foram amostradas 20 parcelas de 20 × 25m de floresta de terra firme para avaliação da composição florística e dos parâmetros fitossociológicos. Foram identificados 378 indivíduos distribuídos em 77 espécies e 32 famílias na área. As cinco espécies com maior número de indivíduos foram: Eschweilera coriacea (DC.) S.A. Mori, Eschweilera collina Eyma, Pourouma mollis Trécul, Dendrobangia boliviana Rusby e Inga capitata Desv. A família Fabaceae foi a família com maior número de indivíduos e os maiores valores de Indice de valor de importância foram obtidos para Eschweilera coriacea (DC.) S.A. Mori. A biomassa florestal estimada para a área foi de 309,77 Mg.ha-1 enquanto o carbono obtido após a conversão da biomassa foi de 148,69 Mg e o teor de carbono equivalente (CO2eq) foi 545,19 Mg. Os resultados encontrados permitem uma boa visualização da estrutura e composição da área, estão em consonância com outros estudos para áreas similares na Amazônia e permitem inferir o estado de conservação e a importância ecológica do Parque Ecológico Gunma para a região.
A framework for the interpretation of heart rate variability applied to transcutaneous auricular vagus nerve stimulation and osteopathic manipulation
Authors: Kania Adrienne , Roufail Jumana , Prokop Joseph , Stauss Harald M.
Published: March 2024

Reports on autonomic responses to transcutaneous auricular vagus nerve stimulation (taVNS) and osteopathic manipulative techniques have been equivocal, partly due to inconsistent interpretation of heart rate variability (HRV). We developed a mechanistic framework for the interpretation of HRV based on a model of sinus node automaticity that considers autonomic effects on Phase 3 repolarization and Phase 4 depolarization of the sinoatrial action potential. The model was applied to HRV parameters calculated from ECG recordings (healthy adult humans, both genders) before (30 min), during (15 min), and after (30 min) a time control intervention (rest, n = 23), taVNS (10 Hz, 300 μs, 1–2 mA, cymba concha, left ear, n = 12), or occipitoatlantal decompression (OA‐D, n = 14). The experimental protocol was repeated on 3 consecutive days. The model simulation revealed that low frequency (LF) HRV best predicts sympathetic tone when calculated from heart rate time series, while high frequency (HF) HRV best predicts parasympathetic tone when calculated from heart period time series. Applying our model to the HRV responses to taVNS and OA‐D, revealed that taVNS increases cardiac parasympathetic tone, while OA‐D elicits a mild decrease in cardiac sympathetic tone.
Determination of essential oil and chemical composition of St. John’s Wort
Authors: Doğan Hülya , Fidan Hafize , Baş Hatice , Stankov Stanko , Stoyanova Albena , Ercisli Sezai , Assouguem Amine , Ullah Riaz , Bari Ahmed
Published: March 2024

Considering it contains a variety of physiologically active compounds, including flavonoids, common phenols, and essential oils (EOs), St. John’s wort (Hypericum perforatum L.) is a common plant in Bulgaria that is predominantly used in folk medicine to cure various disorders. Determining the chemical makeup of St. John’s wort inflorescences that were gathered from northern Bulgaria was the purpose of this investigation. The antioxidant activity of H. perforatum L. extracts was assessed using 1,1-diphenyl-2-picrilhydrazyl (DPPH), ferric reducing antioxidant power (FRAP), and Trolox equivalent antioxidant capacity (TEAC) tests on methanol extract. The amount of EO obtained by water distillation was 0.08%, with its main components (over 3%) being n-nonane (27.46%), β-sesquiphellandrene (11.17%), heptanal dimethyl acetal (5.94%), ethyl hexyl ketone (5.93%), undecane (3.75%), sabinene (3.3%), and tridecyl alcohol (3.1%). Methanol extracts were obtained from the inflorescences, with the total flavonoid content determined as 8.66 mg quercetin equivalents (QE)/mg and total phenolic content as 271.33 mg Gallic acid equivalent/g. The FRAP assay yielded 493.07 µmol/L of antioxidant activity, while the TEAC assay yielded 106.39 µmol/L, respectively. Our findings enable a comprehensive characterization of H. perforatum from Bulgaria and an assessment of its oil suitability for potential industrial applications. Additionally, the results could guide the selection of specimens for future targeted breeding efforts.
Mesoporous silica-grafted deep eutectic solvent-based mixed matrix membranes for wastewater treatment: Synthesis and emerging pollutant removal performance
Authors: Rashid Kanwal , Aslam Muhammad , Rácz Ervin , Nadeem Sohail , Khan Zakir , Muhammad Nawshad , Rashid Zeeshan , Aljuwayid Ahmed M. , Shahid Muhammad Kashif , Irfan Muhammad
Published: March 2024

Nano-enhanced membrane technology and deep eutectic solvents (DESs) have demonstrated effectiveness in addressing emerging environmental pollutants. This research centers on purifying water by removing heavy metals employing membranes enhanced with mesoporous silica and DES. Various DESs, including hexanoic acid, octanoic acid, and decanoic acid, were synthesized using tetrabutylammonium bromide (TBABr) as a base. The study combined a polysulfone-based membrane with mesoporous silica, aiming for efficient indigenous crafting to remove heavy metals. Mesoporous silica was blended with the synthesized DES solution, creating diverse membranes for heavy metal separation. The study characterized these membranes using various techniques such as scanning electron microscopy, atomic force microscopy, energy dispersive X-ray spectroscopy, Fourier transform infrared spectroscopy, and contact angle measurements. Surface mapping confirmed the integration of silicon-based DES, reducing the membrane surface roughness from 4 to 1.4 nm. By adjusting the carboxylic acid chain length with TBABr and adding mesoporous silica, leaching ratios were reduced from 4.2 to 2.3%. Silica-grafted DES-based membranes exhibited a progressive increase in flux from 2.6 to 26.67 L/m2 h. The synthesized silicon-based membranes demonstrated outstanding performance, achieving rejection rates exceeding 80% for chromium and arsenic, maintaining an impressive 90% flux recovery ratio even at high flux rates. This study will envision the potential of nano-enhanced membrane technology utilizing DES for sustainable water purification and wastewater treatment applications to achieve the sustainable development goal (SDG) of clean water and sanitation (SDG-6).
Effects of selected biostimulants on qualitative and quantitative parameters of nine cultivars of the genus Capsicum spp.
Authors: Golian Marcel , Mezeyová Ivana , Andrejiová Alena , Hegedűsová Alžbeta , Adamec Samuel , Štefániková Jana , Árvay Július
Published: March 2024

Despite the growing popularity of biostimulants among farmers, a major problem remains with their variable effects on individual species and varieties of cultivated crops. Therefore, it is important to know how to choose a suitable product for the given growing conditions while simultaneously considering species and varietal variability in crop cultivation. The goal of this study is to highlight different reactions of plants to the applied preparations within the monitored representatives of the Capsicum genus, with an emphasis on intervarietal variability. The experiments with two monitored and one control variants occurred during the growing seasons of 2020 and 2022 in Slovakia’s southwest region, characterized by a European continental climate with warm and dry summers. Seven varieties of Capsicum annuum and two varieties of Capsicum chinense were chosen based on actual growers’ preferences: “Žitava,” “Szegedi 80,” “Karkulka,” “Hodoníska sladká,” “Habanero Orange,” “Habanero Chocolate,” “Kristián,” “Damián” and “Kurtovska kápia.” In the present study, we observed the effects of selected commercial biostimulants – the combination of Energen Fulhum Plus and Energen Fruktus Plus in the first variant and the biostimulant Humix® Universal in the second variant – on bell pepper fruits. We evaluated three productivity parameters: fresh fruit weight per variety, weight of one fruit and number of bell pepper fruits per plant. From the qualitative parameters, we evaluated the content of ascorbic acid, capsaicin, carotenoids, and the American Spice Trade Association color value. The monitored biostimulants had variable effects in all pepper varieties, while some of them statistically significantly increased and others significantly decreased the monitored parameters. In conclusion, we state that the application of verified biostimulants did not have a uniform effect on the observed varieties of the Capsicum genus. Therefore, based on our results, we cannot generalize the effect of a specific biostimulant on a specific crop genus or species.
Pedagógia és politika: a múzeumalapítás avantgárd stratégiái
Authors: Őze Eszter
Published: March 2024

Otto Neurath és munkatársai a gazdaság és a kultúra szembeállítása helyett egy olyan közös nyelv kialakítását szorgalmazták, amellyel a gazdasági okok magyarázatából kiinduló tartalmat összeillesztették a politika által kihasznált művészi formanyelv megújítására törő ábrázolástechnikával. Őze Eszter tanulmányában az általuk alapított bécsi Gesellschafts- und Wirtschaftsmuseum (Társadalmi és Gazdasági Múzeum) pedagógiai projektjét vizsgálja.
Female National Collegiate Athletic Association Division-I Athlete Injury Prediction by Vertical Countermovement Jump Force-Time Metrics
Authors: Merrigan Justin J. , Stone Jason D. , Kraemer William J. , Vatne Emaly A. , Onate James , Hagen Josh A.
Published: March 2024

Merrigan, JJ, Stone, JD, Kraemer, WJ, Vatne, EA, Onate, J, and Hagen, JA. Female National Collegiate Athletic Association Division-I athlete injury prediction by vertical countermovement jump force-time metrics. J Strength Cond Res 38(4): 783–786, 2024—Vertical countermovement jump (CMJ) assessments on force plates have been purported to screen for musculoskeletal injury risk (MSKI) but with little scientific support. Thus, this study aimed to identify associations and noncontact lower-body injury predictability with CMJ force-time metrics in female athletes. The study entailed a retrospective analysis of routine injury and performance monitoring from 155 female National Collegiate Athletics Association Division I athletes. Noncontact lower-body injuries included in analysis were confirmed by medical staff, occurred during competition or training, resulted in time loss from training, and occurred within 3 months following CMJ testing (2 maximal effort, no arm swing, jumps on dual force plates). A total of 44 injuries occurred within 3 months following CMJ baseline testing and resulted in an average of 24.5 missed days from training. Those who sustained an injury were more likely to sustain another injury (15 of 44 injuries [33.1%]; odds ratio = 3.05 [95% CI = 1.31–6.99]). For every 1-unit increase from the mean in eccentric mean power and minimum eccentric force, there was a decrease in odds of sustaining a MSKI. Despite high overall model accuracy (85.6%), the receiving operating characteristic area under the curve (65.9%) was unacceptable and the true positive rate (recall) was 0.0%. Thus, no injuries in the testing data set were correctly classified by the logistic regression model with CMJ force-time metrics as predictors. Baseline CMJ assessment may not be useful for noncontact lower-body musculoskeletal injury screening or predictability in National Collegiate Athletics Association female athletes.
New generation estrogen receptor-targeted agents in breast cancer: present situation and future prospectives
Authors: Min Jian , Liu Xin , Peng Rouming , Chen Chun-Chi , Wang Wei , Guo Rey-Ting
Published: March 2024

Endocrine therapy that blocks estrogen receptor signaling has been effective for decades as a primary treatment choice for breast cancer patients expressing the estrogen receptor. However, the issue of drug resistance poses a significant clinical challenge. It is therefore critically important to create new therapeutic agents that can suppress ERα activity, particularly in cases of ESR1 mutations. This review highlights recent efforts in drug development of next generation ER-targeted agents, including oral selective ER degraders, proteolysis-targeting chimera ER degraders, and other innovative molecules, such as complete estrogen receptor antagonists and selective estrogen receptor covalent antagonists. The drug design, efficacy, and clinical trials for each compound are detailed herein.
Pengembangan E-Learning Menggunakan Aplikasi Moodle sebagai Media Pembelajaran Kesetimbangan Kimia untuk Kelas XI SMA
Authors: Dandulana Rezki Fabilla , Erviyenni Erviyenni , Susilawati Susilawati
Published: March 2024

Penerapan pembelajaran jarak jauh di sekolah akibat dampak penyebaran virus covid-19 di Indonesia menjadi tantangan baru bagi dunia pendidikan demi mencapai pembelajaran yang efektif tidak hanya bagi guru tapi juga peserta didik. Banyak sekolah yang beralih dari penggunaan media pembelajaran konvensional menjadi media pembelajaran berbasis IT, sebagaimana langkah untuk mencapai pembelajaran yang optimal dalam menyajikan sumber pembelajaran sesuai dengan kebutuhan dan karakteristik belajar peserta didik. Penelitian ini bertujuan untuk mengembangkan e-learning menggunakan aplikasi berbasis website bernama Moodle untuk materi Kesetimbangan Kimia pada kelas XI SMA yang valid berdasarkan aspek rekayasa perangkat lunak, aspek desain pembelajaran, dan aspek komunikasi audio visual, serta mengetahui respons guru dan peserta didik. Metode penelitian ini adalah RD dengan model penelitian Plomp. Hasil yang diperoleh dari penelitian ini antara lain (1) hasil validasi oleh validator terhadap produk mencakup aspek desain pembelajaran, rekayasa perangkat lunak dan aspek komunikasi audio visual memperoleh hasil berturut-turut sebesar 95%, 96%, dan 94% dengan kategori masing-masing dinyatakan valid. (2) Respons pengguna yang terdiri dari respons guru sebesar 94% dan respons peserta didik sebesar 94% dengan kriteria respons sangat baik.
A Systematic Literature Review: Model Mental pada Konsep-Konsep Kimia
Authors: Atikah Atikah , Habiddin Habiddin , Nazriati Nazriati , Rahayu Sri , Dasna I Wayan
Published: March 2024

Model mental adalah penggambaran visual pebelajar atau representasi internal yang dimiliki ketika menjelaskan fenomena tertentu. Pada pembelajaran kimia model mental juga seringkali dipahami sebagai pemahaman siswa terhadap tiga level representasi kimia. Penelitian ini menggunakan metode Systematic Literature Review dengan tujuan untuk mengidentifikasi, mengkaji, mengevaluasi, dan menafsirkan penelitian yang tersedia pada topik model mental dengan pertanyaan penelitian yang relevan. Pertanyaan penelitian yang disajikan dalam artikel review ini adalah faktor-faktor apakah yang mempengaruhi model mental pebelajar dalam mempelajari kimia, bagaimanakah trend kategori model mental yang digunakan pada pembelajaran kimia, serta bagaimanakah efektivitas pengukuran model mental dalam pembelajaran kimia. Model mental pebelajar satu dengan yang lainnya berbeda-beda berdasarkan beberapa faktor diantaranya pengetahuan awal, guru, sumber belajar, dan model pembelajaran. Perbedaan tersebut menjadikan model mental pebelajar dapat dikategorikan berdasarkan teori model mental yang sudah ada ataupun berdasarkan konsep yang akan diidentifikasi. Instrumen yang efektif digunakan untuk mengidentifikasi model mental pebelajar adalah tes diagnostik dan wawancara karena dapat menggambarkan model mental pebelajar secara menyeluruh. Penelitian ini menghasilkan kesimpulan mengenai pentingnya mengetahui model mental pebelajar dalam meningkatkan proses pembelajaran kimia. Perlu dilakukan perubahan pada berbagai aspek yang mempengaruhi untuk meningkatkan model mental.
Buku Saku Terintegrasi QR-Code untuk Identifikasi dan Klasifikasi Plankton Air Tawar
Authors: Tirtasari Ni Luh , Prasetya Agung Tri , Arlinto Arlinto , Dewi Siti Herlina
Published: March 2024

Berdasarkan hasil observasi selama praktikum identifikasi plankton dari sistem perairan yang dilaksanakan oleh mahasiswa di Laboratorium IPA Terpadu dijumpai fakta bahwa mahasiswa mengalami banyak kesulitan dalam identifikasi plankton tersebut karena keterbatasan media buku penunjang yang tersedia. Buku panduan identifikasi plankton yang digunakan saat ini merupakan buku pendamping untuk mengamati plankton dalam sampel perairan secara mikroskopis. Akan tetapi masih terdapat kekurangan karena tidak disertai gambar pembanding beserta klasifikasinya. Hal ini menyebabkan hasil praktikum kurang sesuai seperti yang diharapkan. Diperlukan buku panduan identifikasi plankton dalam perairan yang disertai gambar real perbesaran mikroskop dan keterangan klasifikasi yang mudah diakses mahasiswa. Berdasarkan permasalah ini peneliti mencoba membuat panduan identifikasi plankton dengan memanfaatkan aplikasi Quick Response (QR) Code untuk memuat informasi lengkap dari berbagai klasifikasi plankton yang dapat diakses menggunakan smartphone (gadget).Penelitian ini bertujuan untuk membuat panduan identifikasi plankton dengan disertai QR code yang mudah diakses oleh mahasiswa sebagai alat bantu dalam melakukan identifikasi plankton serta dapat dilakukan dimanapun dan tidak harus dilakukan di laboratorium. Selain itu sebagai sarana pendukung dalam penyediaan panduan praktikum bagi laboratorium IPA Terpadu khususnya ilmu lingkungan. Dari penelitian ini diharapkan dapat meningkatkan keterampilan mahasiswa dalam menggunakan mikroskop, serta mengidentifikasi, dan mengklasifikasikan jenis plankton.
Penerapan Model Pembelajaran Problem-Based Learning terhadap Kemampuan Berpikir Kritis dan Aktivitas Belajar Peserta Didik pada Materi Hidrolisis Garam
Authors: Zahro Mawadatuz , Lutfianasari Ulfa
Published: March 2024

This research is motivated by the existence of learning problems at MAN 1 Semarang City which still uses conventional learning models, so that students find it difficult to understand the subject matter delivered by the teacher. Therefore the researchers applied the Problem Based Learning (PBL) learning model with the hope that learning would be more interesting and able to understand students so that the expected results could be achieved. This study aims to find out how students' critical thinking skills and learning activities are carried out through the application of the Problem Based Learning (PBL) learning model in Salt Hydrolysis material. This research is a quantitative research with a quasi-experimental design with nonequivalent control group design method. Methods of data collection using test questions (critical thinking skills) and observation (learning activities). The application of PBL in the learning process can have a positive influence on students' critical thinking skills and activities. This is proven through the t-test analysis of critical thinking skills tcount = 8.071 and ttable =. 2,021. As for learning activities tcount = 5.441 ttable = 2.021, it is concluded that learning using the PBL model is more effective than learning applied using conventional models.
The Analysis of Students’ Cognitive Learning Outcomes through the Implementation of Blended Learning in Junior High Schools Science
Authors: Sapta Aji Rianda Herlan , Astuti Budi , Saptono Sigit
Published: March 2024

Learning in the 21st century needs to accommodate e-learning without having to leave face to face in order to keep it interesting and effective. The innovation that can be done is through the implementation of blended learning to combine the two. Especially during the Covid-19 pandemic, students learn from home so online learning is a must. The purpose of this study is to analyze students' cognitive learning outcomes through the implementation of blended learning in Science in the material on temperature and its changes in Junior High School. This experimental research used a pretest-posttest control group design which contained an experimental class (blended learning) and a control class (online learning only). The sample of this research is the 7th grade students at SMPIT Harapan Bunda Semarang. Collecting data in this study used test methods in the form of pretest and posttest. For data analysis used analysis of learning outcomes completeness, N-gain test and t-test. Based on data analysis, it was found that the implementation of blended learning in Junior high school in science learning was effective enough to improve studentsâ€™ cognitive learning outcomes compared to face-to-face online learning only. This is indicated by the percentage of student learning completeness in the experimental class of 79.66%, while in the control class it is 68.33%. From the results of the N-gain test and t-test it was also found that the experimental class had a higher increase of 0.50, while the control class was 0.44.

Key words: blended learning, cognitive learning outcomes, learning mastery
The Development of Module of Plant Species Resources in Kreo Cave Area of Semarang as a Source of Biodiversity Learning Materials in High Schools
Authors: Prayogo Gogo , Rahayuningsih Margareta , Rahayu Enni Suwarsi
Published: March 2024

The purpose of this study is to analyze the plants species resources and the validity of Module according to the material experts, media experts, and teacher experts, to analyze the practicality, as well as the effectiveness of learning outcomes. This research used the R&D method. This research was conducted using the ADDIE method which was conducted at Islamic High School of Baitussalam involving 2 classes with 62 students in total. Descriptive data analysis was used. The results of the research on biodiversity in the Kreo Cave area which included the levels of genes, species, and ecosystems, found the results of each of the three levels of biodiversity totaling 24 types of plants which are the gene level 2 species, at the species level 7 species and at the ecosystem level at 15 species. The Module of plant species resources in the Kreo Cave area is theoretically feasible by means of validation sheets for material experts, media experts, and teacher experts with respective scores of 76%, 80%, and 81%, or are in the valid category. Student responses to the Module as a learning resource indicate that the Module is very valid. This is proven from the results of small-scale trials that reach an average value of 72% or are in good criteria. Student learning outcomes assessed during the learning process using Modules showed very good results. This is proven by the increase in students' cognitive from an average of 44.18 to 79.6..
Development of Sets-Based Booklets to Improve Critical Thinking Skills and the Effectiveness of Biotechnology Learning in SMA/MA
Authors: Nugraini Anisa Ratna , Iswari Retno Sri , Anggraito Yustinus Ulung
Published: March 2024

Characteristics of learning biotechnology is the existence of a process and product related to everyday life. Therefore, an effective learning process is needed and supported by relevant learning resources. This study aims to analyze the validity of SETS-based biotechnology material booklets used in biotechnology learning. Describe the characteristics of SETS-based biotechnology material booklets. Analyzing students' critical thinking skills in biotechnology learning using SETS-based booklets. Analyzing the effectiveness of biotechnology learning using a SETS-based booklet This research is a research and development (R&D) study. The booklet development trial was conducted in 4 schools, with the research subjects being class XII students in each school. Applicative and meaningful learning of biotechnology can be achieved, one of which is by learning using the SETS vision booklet. The SETS vision booklet contains more concise material, accompanied by attractive, colorful pictures that can effectively improve student learning outcomes. The N-gain value obtained is 0.3-0.4 with the medium category and classical completeness reaching 60%. Critical thinking skills that are formed through active learning using SETS vision booklets are 71% -80% in the high category. Critical thinking skills in integrating SETS elements in biotechnology learning can make it easier for students to understand knowledge concepts, so that they can increase learning effectiveness, namely improving learning outcomes and classical mastery.
An Analysis of Prospective Science Teacher Students’ Misconceptions on Photosynthesis and Plant Respiration
Authors: Nikmah Mazroatun , Susilaningsih Endang , Astuti Budi
Published: March 2024

Misunderstanding in drawing conclusions about a concept caused by errors and incomplete thinking is called misconception. The existing misconception can lead to ongoing misconception if it is not immediately corrected. This study aimed to analyze how the level of misconceptions that occured in prospective science teachers. This study was conducted using a mixed-method with an explanatory sequential design. Methods of collecting data were Three Tier Multiple Choice (TTMC) test questions to analyze the misconception and in-depth interview to determine the factors causing misconceptions. The instrument used in this study was TTMC diagnostic test. Technique used for analyzing misconceptions data were descriptive percentages and for analyzing factors causing misconceptions data were in-depth interview. The results show that 60.4% of prospective science teacher students had misconceptions, which means that the misconceptions that occured were in the high category. Factors causing misconceptions were dominated by incompleteness in understanding the material, the influence of previous learning, the references used contain the wrong concept, low interest in deepening the material to find out the correct concept. This study is expected to help teachers and prospective teachers to decide what learning methods can be used to prevent misconceptions. Remediation can be done to find out where the misconceptions occur so that it can be corrected more quickly.
Development of E-Module Ethnobotany Based on Lombok Local Wisdom to Improve Student Motivation and Learning Outcomes in High School
Authors: Rofi’i M , Iswari Retno Sri , Indriyanti Dyah Rini
Published: March 2024

This study aims to determine the characteristics of the E-module, the validity of the Lombok local wisdom E-module, the readability of students' responses to the E-module, the effectiveness of the E-module in increasing motivation and learning outcomes, and the practicality of the developed E-module. This type of research is the development of research and development (R&D) to see the level of validity of the Lombok local wisdom E-module E-module which was developed by a research procedure by applying 9 steps, preliminary studies, product drafting, design validation, design revisions, limited scale trials, revision of the results of limited trials, large-scale trials, product revisions, practicality and readability tests and finally the final product, this product is an E-module of Lombok's local wisdom ethnobotany. The results of this study indicate that the Lombok local wisdom E-module ethnobotany obtained 76.00% declared valid by expert lecturers with an average value, material expert validation obtained an average value of 76.00% while media expert validation was 92.18%. The results of a large-scale trial of 75 students from each school obtained an average student response of 87.17%, 84.25% and 81.83%. The results of the N-gain value from each school showed that there was an increase in student learning outcomes after using the E-module in the learning process, namely 0.86, at SMA NW Anjani in the high category 0.78, at MA Muallimin NW Anjani school in the high category. the last high of 0.78. at SMA NW Suralaga classified as high category. Furthermore, the results of the practicality test questionnaire filled out by 3 biology teachers obtained average results of 95.00, 98.50 and 97.50 from each school. And this research produces an effective and practical E-module for class X IPA SMA. These results indicate that the product developed is an E-module of Lombok local wisdom ethnobotany as a supplement to plant material to increase motivation and learning outcomes in high school.
Analysis of Students' Critical Reading Ability in Science Learning Using the Argument-Based SQ3R Method
Authors: Heriana Dena Emarani , Hartono Hartono , Isnaeni Wiwi
Published: March 2024

The challenges that students will face in the future are complex, so students need a myriad of competencies. To be able to compete and face challenges in the industrial era 4.0, one of which is the ability to process information and communicate. This study aims to analyze the effect of the argument-based SQ3R method in improving students' critical reading skills in science learning. This research is a Quasi-Experimental study with a randomized pretest-posttest control group design. The research sample consisted of 62 class VIII students consisting of two classes. The technique for collecting data on reading interest used a questionnaire sheet instrument and data on the results of students' critical reading ability used essay questions. Based on the results of the research data analysis, it was shown that the argument-based SQ3R learning method had a positive effect on students' critical reading skills, with the results of the t-test showing Asymp. sig. of 0.00 <0.05, with supporting data on students' critical reading skills seen from the student's reading interest questionnaire with the results of the Mann Whitney U-test showing Asymp. Sig of 0.018 <0.05 which means that there is an influence of the argument-based SQ3R learning method on students' critical reading skills.
Development of Biodiversity E-Module Based on Local Potentials in Labuhanbatu Utara Regency to Train Science Literacy of High School Students
Authors: Azmi Nurul , Ngabekti Sri , Rahayuningsih Margareta
Published: March 2024

The local potential of North Labuhanbatu Regency is very diverse, which has the potential as a source of learning on biodiversity material to develop scientific literacy needed in 21st-century learning. Scientific literacy enables students to apply science in everyday life, not just understanding science in concepts. This study aims to produce local potential-based electronic modules in North Labuhanbatu Regency that are feasible based on validity, readability, and effectiveness to train students' scientific literacy. This research is a research and development (R&D) with a 4-D development model and a one-shot case study research design. Based on the results of the validation test, a percentage score of 94.22% was obtained, including the very valid category. The readability results obtained a score of 89.66 which indicates excellent legibility. Posttest results showed an average of 81.81 with an average classical completeness of 84.05%, including in the excellent and effective category. Based on these results the development of a biodiversity electronic module based on local potential in North Labuhanbatu Regency was declared feasible based on validity, readability, and effectiveness as teaching materials.
Development of Mollusca Diversity E-Booklet at Bondo Beach Jepara to Improve Student Learning Outcomes
Authors: Fa’izah Laela Noor , Setiati Ning , Tri Martuti Nana Kariada
Published: March 2024

Observation results obtained by the availability of learning resources used are still less diverse and do not support the learning objectives achieved. The learning resources used are still limited to book packages, Student Worksheets (LKS) and Power Points (PPt). The biodiversity in Jepara Bondo Beach is very high which has not been used as a source of learning biology at SMA Islam Nusantara and SMA PGRI Jepara. The environment around the school has not been used as a learning resource because it has not represented biological wealth. Therefore, Jepara Bondo Beach is a representative place to be used as a source of learning that is close to schools. This study aims to develop an e-booklet on the diversity of Mollusca at Bondo Beach, Jepara in a factual, systematically arranged according to the material, valid, effective in increasing learning outcomes in the cognitive and psychomotor domains in practicing oral communication skills in the sub-material classification of living things. This research uses the development method (R&D) with the ADDIE model (Analysis, Design, Development, Implementation, and Evaluation). The research data were analyzed for its characteristics, validity and effectiveness. The results of the study can be concluded that the e-booklet characteristics of Mollusca paintings on Bondo Beach Jepara are factual which are arranged systematically so that they can reach TP 10.1 to 10.3, the e-booklet is very valid and feasible to use based on expert judgment, and is effective in increasing cognitive and psychomotor learning outcomes in practicing oral communication skills.
La investigación formativa con un enfoque de responsabilidad social
Authors: Ruiz Lucila Perilla
Published: March 2024

Pensar en la interacción de la investigación y la responsabilidad social, da la posibilidad para que se materialicen proyectos donde sea factible referirse a procesos educativos con pertinencia académica y pertenencia social. Pero ¿cómo hacer que exista una sinergia entre estas dos dimensiones? y ¿cómo se puede llevar a un proceso de trabajo en el aula?; estos cuestionamientos han sido el motivo de preocupación que buscan una transformación en el quehacer del docente no solo en la manera como asume el proceso enseñanza-aprendizaje, sino que también incluye la puesta en dialogo del saber disciplinar y el conocimiento social y como llevar este consenso a escenarios en los que se permita vislumbrar el significado y la relevancia del conocimiento como factor de transformación reciproca para los actores involucrados. La idea de este documento es presentar como se logra a partir de proyectos de aula el acercamiento entre la investigación, en especial en su etapa formativa con relación al enfoque de responsabilidad social.
Fifty years of Lithuanian school mathematical olympiads
Authors: Kašuba Romualdas , Mačys Juozas Juvencijus
Published: March 2024

In the paper the importance of the mathematical olympiads for the general development as well as for the actual state of education and training of mind and related problems are discussed. A review of the local net of Lithuanian olimpiads is made and especially the last achievments of the Lithuanian high school and University students in the World olympiads are analyzed.
A limit theorem for the Riemann zeta-functions in the space of continuous functions
Authors: Belov Igor
Published: March 2024

There is not abstract.
Характеристическое сингулярное интегральное уравнение с плюс-бесконечным индексом логарифмического порядка
Authors: Alekna Petras
Published: March 2024

There is not abstract.
Determination of an unstability area of a system by using the expansion of a n-th order determinant by k-th order determinants
Authors: Kavaliauskas Algis
Published: March 2024

The article deals with a proof of a formula, devoted to expansion of a determinant by any of k rows and k columns. By its help the area of unstability in a electromechanical system can be determined.
Parallel computer algebra system
Authors: Judickaitė Valdona , Kulvietienė Regina , Kulvietis Genadijus
Published: March 2024

There is not abstract.