bluuebunny/crossref_metadata_2025 huggingface dataset:
Effects of black soldier fly (Hermetia illucens) larvae meal on production performance, egg quality, and physiological properties in laying hens: A meta-analysis
Authors: Fikri Faisal , Purnomo Agus , Chhetri Shekhar , Purnama Muhammad Thohawi Elziyad , Çalışkan Hakan
Published: August 2024

Background and Aim: The primary components of fat and protein in chicken diets are fishmeal and soybean; however, due to limited supply and high costs, several efforts have been made to utilize alternative feedstuffs. The potential of black soldier fly larvae (BSFL) as a substitute for fat and protein has been extensively studied, but the findings are not consistent. This study used a meta-analysis approach to investigate the integrated efficacy of BSFL supplementation on laying hen production performance, egg quality, and physiological properties.

Materials and Methods: The articles were retrieved from PubMed, Scopus, ScienceDirect, Cochrane Library, and ProQuest. The retrieved references were examined for potential inclusion. The relevant findings of the included studies were then extracted. Fixed-effects, standard mean difference, 95% confidence intervals, and heterogeneity models were analyzed using the Review Manager website version (Cochrane Collaboration, UK).

Results: A total of 24 papers from 17 different nations across five continents have been selected for meta-analysis out of the 3621 articles that were reviewed. The current meta-analysis demonstrated that providing BSFL meals significantly favored feed efficiency, haugh units, albumen quality, eggshell quality, serum glucose, and lipid levels. In addition, significant trends in alanine transaminase, alkaline phosphatase, magnesium, phosphorus, chlorine, and iron levels were observed in blood urea nitrogen, uric acid, creatinine, lactate dehydrogenase, creatine kinase, glutathione peroxidase, and malondialdehyde. On the other hand, it was revealed that there was no favorable effect on weight gain, laying, yolk quality, and hematological profile.

Conclusion: The meta-analysis confirmed that BSFL meals can be utilized to optimize feed efficiency, haugh units, albumen, eggshell quality, liver, renal, and cellular physiology of laying hens, although they did not significantly increase body weight gain, laying production, and hematological profiles.

Keywords: black soldier fly, egg quality, food production, laying hen, meta-analysis.
G.I. bleed in female with clear upper endoscopy and colonoscopy
Authors: Singh Maneesh
Published: August 2024

In this paper, we discuss a case 78-year-old female with black tarry stool and a hemoglobin of 6.1 who presented to a gastroenterology clinic. What is makes this case interesting is that this patient had an upper and lower endoscopy done, which showed no sources of bleeding. A deep bowel enteroscopy had to be done and only showed some minor small ulcers in the small intestine. She was treated with blood transfusions, followed by iron infusions to treat her iron deficiency anemia.
Fabrication of a SiO2/TiO2 dual nanograting coupler for the development of a higher order diffractions or overray type highly efficient compact VR-HMD
Authors: ogata yoichi
Published: August 2024

In general, a virtual reality head-mounted display (VR-HMD) consists of a display, a light source, and a coupler. A coupler using a nanograting (Gr) leads to improvements in the performance and compactification of the device. To date, many research studies on compact high-performance HMDs using dielectric Gr couplers have been reported. However, to create an ultracompact highperformance HMD, a dual-Gr sample must be prepared as a new coupler. In this work, an attempt has been made to build a model of an HMD using dual Gr samples and their optimization for ray-tracing simulation and their fabrication process has been discussed.
La educación ambiental y para el cambio climático en Latinoamérica: una revisión de alcance
Authors: Medina-Arboleda Iván Felipe , Páramo Pablo
Published: August 2024

Introducción/objetivo: La educación ambiental y la educación para el cambio climático son dos iniciativas fundamentales para Latinoamérica; sin embargo, pocos trabajos han descrito a profundidad la investigación disponible en la región sobre estas. Método: Se implementó una revisión de alcance tipo Prisma de trabajos empíricos (análisis cuantitativo, cualitativo y mixto), en español, inglés o portugués, en Scielo, Redalyc y Scopus. Resultados: un total de 66 artículos conformaron la base final. En general, la educación ambiental y la educación para el cambio climático han sido abordadas interdisciplinariamente, aunque con un predominio del campo educación. Los dominios incluyen el conocimiento ambiental, actitudes proambientales, prácticas de siembra y cuidado animal. Hay reportes en todos los niveles de formación, con una mayoría en educación superior. Los efectos de las intervenciones son positivos; sin embargo, solo en una investigación se reporta el registro de seguimientos y en pocas hay registro de comportamientos. Conclusiones: las implicaciones para el diseño de actividades educativas de educación ambiental y educación para el cambio climático consisten en que estas aborden problemáticas ambientales locales, integren diferentes disciplinas, incluyan actividades de interacción con la naturaleza y duren más de un semestre lectivo.
INSTALASI PERANGKAT PRODUKSI PADA PROSES PENGERINGAN BIJI BUNGA MATAHARI DI KELOMPOK TANI DESA CIHANJUANG BARAT
Authors: Nunung Nurhasanah  , Muthohar Akhmad
Published: August 2024

Sunflower (Helianthus annuus L.) is a perennial plant originating from Mexico and Peru. This plant has high value-added when processed into cooking oil, herbal oil, and livestock feed. Global oil production is only able to meet a demand of 0.26%. Indonesia has the opportunity to develop the cultivation of this plant to enhance its added value and global competitiveness. Community empowerment activities aim to improve the welfare of sunflower farmers and raise social awareness among students regarding the surrounding community. Problems in the production sector are: (i) farmers cannot ensure that sunflower seeds that have been dried have a moisture content of 12%, (ii) the drying process in some places still relies on sunlight, and cannot anticipate if it rains. So, based on the analysis carried out, we carried out empowerment activities in the form of installing production installing production equipment in the sunflower seed drying process for farmer groups in the village of Cihanjuang Barat. Socialization and guidance on the use of equipment was carried out to farmers regarding production equipment that can help the production process. After the installation has been successfully carried out, the sunflower seeds reach a moisture content of 12% according to the wishes of the farmers and it is hoped that they can replace conventional sunflower seed drying processes such as which was done previously.
Analisis Implementasi Program Klinik Literasi GEDEBUK dalam Meningkatkan Kemampuan Literasi Siswa pada Kurikulum Merdeka
Authors: Fitriani Anita , Attalina Syailin Nichla Choirin
Published: August 2024

Purpose – This research aims to identify student literacy problems at SDN 4 Kedungcino and analyze the implementation of the GEDEBUK literacy clinic program.Method – This study used descriptive qualitative method. An approach that aims to describe subjects related to the conditions observed and data collection techniques in this research through the process of observation, interviews and documentation. This research was conducted at SDN 4 Kedungcino. Checking the validity of data from observations, interviews and documentation uses triangulation, where the collected data is analyzed through data reduction, data presentation and drawing conclusions.Findings – The research results show that after the implementation of the GEDEBUK literacy clinic program, students' literacy skills have improved. The impact of implementing this program is that students who previously still had difficulty reading are now starting to be able to read books independently fluently, then students who are still in the reading comprehension stage are now able to tell stories well according to the understanding of the books they read. The existence of this literacy program also makes the school library active again. Research Implications – The research provides important insights for improving literacy in elementary schools. However, further improvements need to be made regarding adequate literacy facilities so that the literacy program can be implemented well and optimally.
Strategi Pola Komunikasi Keluarga Katolik di Era Digital
Authors: Tampubolon Benny Ariandi , Tampubolon Benny Ariandi
Published: August 2024

Purpose – This research aims to examine Catholic families' strategies in building effective communication patterns and educating their children with moral, intellectual, and religious values in the digital era.Method – The method used is qualitative research with observation, interviews, and documentation conducted at Stasi Santo Matias Rasul Simpang Empat Paroki Santo Pius X Aek Kanopan. Primary data was obtained from interviews and direct observation of the family, while secondary data was obtained from relevant literature.Findings – The research findings show that Catholic parents play an important role as faith educators by encouraging participation in mass celebrations and religious activities, and teaching the importance of prayer both individually and corporately. In addition, parents as providers of love teach good manners, respect for others, and responsibility through modeling good actions. Parents also serve as role models in communication by teaching good and polite ways to communicate, and building openness in communication to create a good relationship between parents and children. Research Implications – The implication of these findings is that the strategies implemented by Catholic parents can shape children's characters into independent and qualified individuals in the future. By implementing these strategies, Catholic families can create harmonious communication and support the moral, intellectual, and spiritual development of their children in facing the challenges of the digital era.
Analisis Akurasi Soal Pilihan Ganda Materi Rangka Manusia pada Ulangan Harian Siswa di Sekolah Dasar
Authors: Arwinda Putri , Prasetyo Sigit
Published: August 2024

Purpose – This study aims to determine the quality of multiple choice items on human skeletal material in terms of validity, reliability, difficulty level, and differentiating power.Method – This research uses a quantitative descriptive approach. the subjects in this study were grade V students of State Elementary School 1 Sungai Bungin, totaling 22 students. the sample selection technique used saturated sampling technique. the data collection technique was carried out by the documentation method from the test results. the collected data were analyzed using the SPSS IBM Statistics 27 application to determine the criteria for the items.Findings – This study provides a detailed description of the validity, reliability, differentiating power, and difficulty of the questions. It found 17 valid items (68%), with high reliability (Cronbach's Alpha: 0.798 and 0.792). A total of 4 items had sufficient differentiating power, 19 items were good, and 2 items were excellent. The level of difficulty of the questions varied: 4 difficult questions (16%), 13 medium questions (52%), and 8 easy questions (32%). Research Implications – This research has important implications for improving the quality of education in elementary schools. The results of analyzing the accuracy of multiple choice questions on human skeletal material can be used to improve and develop questions that are more appropriate in measuring student knowledge. Teachers can adjust teaching methods based on the difficulty level of the questions, improve learning effectiveness, and provide more constructive feedback. In addition, the findings can assist in more targeted curriculum development and teacher training in the creation of high-quality questions. Thus, this study contributes to the improvement of student learning outcomes and the implementation of data-driven evaluation in the primary education system.
Pengembangan Aplikasi Android Guizzer sebagai Media Pembelajaran Matematika untuk Siswa Kelas V Sekolah Dasar
Authors: Ningkrum Indriyani , Riswari Lovika Ardana , Najikhah Fatikhatun
Published: August 2024

Purpose – This research aims to determine the feasibility of the Android-based "guizzer" application in mathematics learning for fifth grade elementary school. The lack of teacher innovation in the use of learning media, especially mathematics, makes students less enthusiastic. Therefore, researchers developed an Android-based Guizzer application to improve the quality of fifth grade elementary school mathematics learning.Method – This research uses Research and Development (R&D) research with the ADDIE development model including the Analyze, Design, Development, Implement and Evaluate stages. This research was carried out at Waturoyo State Elementary School with the research subject being class V. Data collection techniques used included observation, interviews and questionnaires. The data analysis used is in the form of validity.Findings – The research results show that the results of media validation by validator 1 were 78.3% and validator 2 were 85%, resulting in an average of 81.65% (very feasible). The results of material validation by validator 1 obtained a percentage of 83.3% and validator 2 of 81.7%, so an average of 82.5% was obtained (very feasible). The results of the trial, namely student responses, obtained a percentage of 97.1% (very feasible). It can be concluded that the "guizzer" application is very suitable for use in the learning process. Research Implications – Based on the research results, the Android application "Guizzer" is suitable for use in the fifth grade elementary school mathematics learning process. The implication is that students are interested and enthusiastic in the learning process, thereby making a positive contribution to achieving learning goals.
Meningkatkan Pemahaman Konsep dan Kolaborasi Siswa: Peran Model Problem Based Learning Terhadap Siswa Kelas V
Authors: Rahayu Putri Nurjati , Aeni Ani Nur , Sujana Atep
Published: August 2024

Purpose – Teacher-centered learning models and a lack of variety limit students' opportunities to be active and think critically, affecting their concept comprehension and collaboration skills. This study aims to investigate the role of the Problem Based Learning (PBL) model on fifth-grade students' understanding of the human respiratory system and organs.Method – This quasi-experimental study used a Non-Equivalent Control Group Design, involving experimental and control classes of fifth-grade students from a public elementary school in Harjamukti District, Cirebon City. Data was collected using testing and non-testing methods. Test instruments used to determine students' concept understanding using pretest and posttest assessments and non-test data is collected using observation.Findings – The results showed that the implementation stages of PBL were carried out very well; both the experimental and control classes showed an increase in concept comprehension, with PBL having a more significant impact. PBL increased concept understanding with an average N-Gain of 57.7% compared to 35.2% in the control class, and increased student collaboration with a percentage of active participation of 84%. Research Implications – The implication in this study is that the PBL model runs very well so that it can significantly improve students' understanding concepts in the material of the human respiratory system and organs. Can also develop students' collaboration skills so that they are more active in class. However, it is limited by its focus on a small sample and specific material. Broader research with diverse samples and materials, or additional variables, is needed for more comprehensive conclusions.
Optimalisasi Kemampuan Menulis Teks Eksplanasi dan Keaktifan Siswa Kelas 11 Melalui Model Pembelajaran Problem Based Learning
Authors: Simanjuntak Hanna Maria , Telambanua Sadieli , Perangin-Angin Esra
Published: August 2024

Purpose – This study aims to explore the effect of Problem-Based Learning Model (PBL) on the learning outcomes of students in grade XI of SMAN 4 Medan in writing an explanatory text in Indonesian language subject. By focusing on the effectiveness of PBL in improving students' writing skills, this study provides theoretical contributions to the development of learning theories as well as practical benefits for teachers and schools in improving the quality of learning.Method – The study used a quasi-experimental design with an experimental group and a control group. The approach was Problem Based Learning (PBL) Model. The research was conducted at SMAN 4 Medan involving students of grade XI. Data were collected through an explanatory text writing test conducted before (pretest) and after (posttest) the application of PBL. The analysis was conducted by comparing the posttest results between the experimental group using PBL and the control group using conventional learning methods. The results were analyzed to assess the effectiveness of PBL in improving students' writing ability.Findings – The results showed that the Problem-Based Learning Model (PBL) significantly improved students' learning outcomes in writing explanatory texts. Proven by the average value of posttest in the experimental group which is higher than the control group, which proves the effectiveness of PBL in the context of Indonesian language learning in class XI SMAN 4 Medan. Research Implications – The Problem-Based Learning (PBL) model enhances students' writing skills in explanatory texts at the senior high school level. This study, limited to one school, does not reflect broader educational variations in Indonesia. It focused solely on PBL's impact on writing skills without a thorough exploration of other influencing factors. Future research should expand the sample size and include diverse contextual elements to more robustly verify these results.
Korelasi Penggunaan Media Pembelajaran Canva Terhadap Motivasi Belajar Peserta Didik
Authors: Mustakim Abd. , Halik Abdul , Akib Muh. , Saleh Muhammad , Kaharuddin Kaharuddin , Ismail Indriani H.
Published: August 2024

Purpose – The objective of this study is to examine the correlation between the use of Canva-based SKI instructional videos and student motivation at MAS DDI As-Salman Allakuang. It aims to determine how Canva's integration influences aspects of student motivation such as interest, effort, and perseverance, providing insights into the effectiveness of digital learning tools in enhancing student engagement and motivation.Method – This study employs a quantitative correlational design to measure the impact of using Canva-based SKI instructional videos on student motivation at MAS DDI As-Salman Allakuang. A purposive sample of 54 students was selected. Data were collected using a validated motivation questionnaire covering aspects like interest, effort, and perseverance. Pearson correlation statistics were used to analyze the relationship between the use of Canva-based SKI instructional videos and student motivation.Findings – This study found a significant moderate positive correlation (r=0.617, p=0.001) between the use of Canva-based SKI instructional videos and student motivation in Aqidah Akhlak learning at MAS DDI As-Salman Allakuang. This indicates that more frequent use of Canva-based videos is associated with higher student motivation. These findings confirm the hypothesis and demonstrate that digital learning tools like Canva can enhance student motivation. Research Implications – Using Canva-based instructional videos in Aqidah Akhlak learning can practically enhance student motivation. However, to confirm this effect, more diverse, experimental, and long-term studies are needed due to limitations in causation and potential biases.
Transformasi Pembelajaran Kewirausahaan: Mengasah Kreativitas Siswa melalui Project Based Learning
Authors: Rahmawati Rani , Sujaya Krisna , Yusup Ismail
Published: August 2024

Purpose – This research is the background of the low creative thinking skills of class XII TKJ in PKK subjects at SMKN Sukaresik. This study aimed to determine the differences in creative thinking skills of experimental class students who applied the project-based learning model with the control class who used the conventional model.Method – The model used in this research is a quasi-experiment with Nonequivalent Control Group Design. Data collection techniques in this study were questionnaires through pretest and posttest, observation, and documentation. The data analysis techniques consist of descriptive analysis, normality test, homogeneity test, independent sample t-test, and N-Gain test.Findings – The results of the data analysis showed that the sig value (two-sided p) < 0.001 and it is smaller than 0.005, so there is a significant difference in the creative thinking ability of the experimental class using the project-based learning model with the control class using the conventional model. Based on the n-gain value of 0.75, the project-based learning model is proven to be better at improving creative thinking skills. Research Implications – The impact of this research is to provide references to teachers in determining the proper learning model to apply in PKK learning. Teachers must build a learning environment that can stimulate learners' creativity. One of these efforts is embracing learners to be directly involved in the learning process through group discussions, collaborative projects, or presentations.
Upaya Peningkatan Kemampuan Literasi melalui Buku Cerita Bergambar Berbasis Kearifan Lokal untuk Siswa Kelas II SD
Authors: Himawati Luh Putu , Sudiana I Nyoman , Putrayasa Ida Bagus
Published: August 2024

Purpose – This research aims to determine the characteristics, validity, practicality, and effectiveness of illustrated children's story books based on local wisdom to improve the basic literacy skills of reading and writing in class II elementary school students.Method – This type of research is development (Research and Development). The data collected is in the form of validity, practicality, and effectiveness data. The research instruments used include questionnaires and tests. Validation sheets are used to collect data about the validity of the book. Response questionnaires are used to collect data about teacher responses to measure the practicality of books, Question Instruments are used to collect data about students' reading and writing skills to measure the effectiveness of books. Data was analyzed quantitatively descriptively.Findings – The results of this research show that the product developed is categorized as very valid both in terms of content, graphics, presentation, and language, this is proven by a CV value of 1. The product in the form of the story book "Ready Selem" is categorized as practical. In general, the practicality value of the interest aspect received a score of 24.8 which was categorized as very good, the material presentation aspect received a score of 24.4 which was categorized as very good, and the language aspect received a score of 24.5 which was categorized as very good. In general, the average practicality score is 24.5 in the very practical category. Research Implications – The story book product "Ready Selem" is categorized as effective. This can be seen from the increase in the score obtained before being given the picture story book media compared to after being given the picture story book to class II students at SD Negeri 1 Jatiluwih, with a significant value.
Peningkatan Hasil Belajar Siswa melalui Model Kooperatif Tipe TGT dalam Pembelajaran Matematika di Kelas XI
Authors: Auliya Anisa Rima , Ardelia Nadia Rizki , Usodo Budi
Published: August 2024

Purpose – Several phenomena have been observed, including a notable lack of active student engagement, which has led to poor learning outcomes. Consequently, this research aims to investigate the enhancement of student learning outcomes through the implementation of the TGT (Teams-Games-Tournaments) cooperative learning model in eleventh-grade mathematics education.Method – The research method employed is Classroom Action Research (CAR), which comprises two cycles, each encompassing four stages: planning, action, observation, and reflection. The research instrument consists of test questions designed in accordance with the learning objectives. The success indicator for this research is that 75% of the students achieve learning mastery.Findings – The integration of the TGT (Teams-Games-Tournaments) cooperative learning model can improve student learning outcomes. Based on the research results and data analysis in cycle 1, the percentage of students achieving learning completeness was 42%. Since this did not meet the success indicators, the research continued into cycle 2, where an increase of 36% was observed. The percentage of students achieving learning completeness in cycle 2 was 78%, thereby meeting the success indicators, and thus, the research concluded at cycle 2. Research Implications – The implications of this research highlight the importance of selecting a learning model that promotes active student participation in the learning process to enhance students' learning outcomes in vector material. However, a limitation of this research is the restricted sample size, as it focuses solely on one school.
Penerapan Flipped Classroom untuk Meningkatkan Kemampuan Berpikir Kritis Siswa pada Pembelajaran Agama Katolik
Authors: Simbolon Erikson , Sitepu Elza Nadyia Br
Published: August 2024

Purpose – The critical thinking ability of students forms the foundation for developing competent learners. This critical thinking ability can be facilitated through the application of the Flipped Classroom learning model. The purpose of this research is to understand the implementation of the Flipped Classroom model to enhance students' critical thinking skills in Catholic religious education.Method – This research method used by researchers is qualitative. Data collection techniques were carried out through observation, interviews, and documentation. Data processing techniques are done through data reduction, data display, and conclusion drawing.Findings – The findings of this study indicate that improving students' critical thinking skills in Catholic religion learning can be done in two ways, namely the application of the Flipped Classroom learning model refers to discussion preparation and discussion activities as well as through interpretation, analysis, evaluation and inference. Research Implications – This research has relevant implications for the Flipped Classroom learning model on improving students' critical thinking skills. However, this research is limited by its focus on a conceptual approach without empirical testing so further research is needed to test the applicability of the learning model theory in actual practice in an educational setting.
Analisis Kebutuhan dan Pengembangan Kompetensi Pengawas Sekolah Dasar di Kabupaten Pidie
Authors: Jafriany Yuni , Musdiani Musdiani , Novita Rita
Published: August 2024

Purpose – This research aims to analyze the needs of elementary school supervisors in Pidie District and to develop strategies to enhance their competence.Method – The research method utilizes a qualitative descriptive approach through interviews, observations, and documentary studies. The results indicate deficits in supervision and insufficient competence. Recommendations include increasing the number of supervisors and providing further training. This study is expected to enhance the quality of elementary education supervision in Pidie.Findings – The research findings indicate a deficit in the number of supervisors and insufficient competence in Kabupaten Pidie. The proposed recommendations include increasing the number of supervisors and implementing advanced training programs. Through these efforts, it is hoped that this study can significantly contribute to enhancing the quality of supervision in basic education in Pidie, thereby improving overall teaching and school management processes. Research Implications – The research improves supervision quality by pinpointing ineffective areas needing enhancement. Tailoring resources to specific needs optimizes supervisor numbers and task distribution for better outcomes. Findings also inform enhanced education policies for elementary school management and supervision. However, challenges unique to Kabupaten Pidie require a nuanced, contextual approach beyond general analyses.
Pengembangan Flash Card untuk Meningkatkan Motivasi Belajar Ilmu Pengetahuan Sosial di SMP Bustanul Ulum
Authors: Zahroh Faniatus , Mariatun Ika Lis
Published: August 2024

Purpose – At school, students often encounter various learning challenges, with a particular issue being their lack of motivation, which makes it difficult for them to absorb lessons. This research aims to investigate the procedures for developing Flash card learning media, assess its appropriateness, and identify the development of student learning motivation after the use of Flash cards in the Social Sciences subject, specifically the economic activity material, for class VII at Bustanul Ulum Islamic Junior High School.Method – The research method employed in this study is a type of Research and Development (R&D), specifically focusing on media research and development using the ADDIE model. ADDIE stands for Analysis, Design, Development, Implementation, and Evaluation. Data collection involves the use of questionnaires from media experts, material experts, field practitioners, and student responses. Data analysis techniques incorporate both qualitative and quantitative approaches.Findings – The findings indicate that Flash card media is suitable for application and can significantly impact students, particularly in Social Studies subjects. This is evidenced by validation results from media experts, linguists, field practitioners, and the improved student scores compared to previous assessments. Research Implications – The implications of this research demonstrate that the application of Flash card learning media can enhance students' learning motivation. This research specifically focuses on the economic activity material in class VII Social Studies. The scope of the research is limited to one school and a specific set of subjects.
The Processing Spatial Data for Statistical Modeling and Visualization Case study: INLA model for COVID-19 in Alabama, USA
Authors: Engidaw Getachew , Terdik György
Published: August 2024

This research emphasizes the visualization of spatial data for statistical modelling and analysis of the relative risk associated with the COVID-19 pandemic in Alabama, USA. We used Bayesian analysis and the Integrated Nested Laplace Approximation (INLA) approach on data ranging from March 11, 2020, to December 31, 2022, which included observed COVID-19 cases, the population for each of the Alabama counties, and a Geographical map of the state. The geographical distribution of COVID-19’s relative risk was determined using various spatial statistical techniques, indicating high-risk locations. The study used Besag-York-Mollié (BYM) models to assess the posterior relative risk of COVID-19, and it found a statistically significant average decrease in COVID-19 case rates across the 67 counties evaluated. These findings have practical implications for evidence-based policymaking in pandemic prevention, mitigation, and preparation.
Physiological responses of wheat cultivars to anti-transpiration compounds and drought stress ameliorators under water-deficient conditions
Authors: Razzaghi Somayyeh
Published: August 2024

Anti-transpiration compounds are essential for mitigating the impact of water scarcity by reducing plant water uptake and enhancing water use efficiency. To evaluate the effects of these compounds on the physiological traits of wheat cultivars under water deficit conditions, 2 field trials were conducted during the 2019 and 2020 cultivation periods. The trails involved three irrigation levels: I1 (100 mm evaporation from Class-A pan), I2 (130 mm evaporation from Class-A pan) and I3 (160 mm evaporation from Class-A pan), which were applied to the main plots. Two bread wheat genotypes, G1 (Hydari) and G2 (Zarrineh), were used in the trails. Various anti-transpiration and stress amelioration compounds were tested, including kaolin (5 %), chitosan (200 mgL?¹), calcium chloride (50 mM), sodium selenate (40 mgL?¹) and a control treatment, which were randomized in subplots. In both years, the most significant reduction in transpiration was observed with the foliar application of chitosan following irrigation after 160 mm evaporation. Catalase (CAT) activity increased in both cultivars when subjected to foliar application of calcium chloride. Additionally, the chitosan treatment exhibited the highest peroxidase activity and the lowest malondialdehyde (MDA) activity. Notably, the chitosan treatment, particularly under irrigation withholding at the I1 level, resulted in the highest grain yield, especially with the Zarrineh cultivar. The application of anti-transpiration compounds demonstrated the ability to elevate levels of antioxidant enzymes and enhance the physiological traits of wheat under stress conditions. However, it is important to note that the extent of these improvements varies based on the timing of stress application and the type of cultivar involved.
The Impact of Body Composition and Physical Fitness on Parasympathetic Reactivation in Firefighters
Authors: Demiralp Nuray , Koç Hürmüz
Published: August 2024

Objective: Firefighting involves aerobic and anaerobic physical activities that cause heart rates to rise from submaximal to above maximal levels. These varying demands can occur with each call firefighters respond to during their shift, imposing both acute and cumulative cardiovascular loads. Heart rate is commonly used to measure cardiovascular responses during disasters, emergencies, firefighting, and firefighting simulations. There is substantial evidence suggesting that heart rate recovery (HRR) parameters are associated with body composition and aerobic fitness. Therefore, the primary aim of this study is to determine the relationship between body composition, physical fitness, and HRR parameters in firefighters.
Method: This cross-sectional descriptive study was conducted among firefighters working in a metropolitan municipality. Using the G-Power 3.1 program, seventy-four firefighters (age = 32.61 ± 8.9 years, height = 1.76 ± 0.6 cm, weight = 83.9 ± 13 kg) volunteered to participate in this study. Body mass index (BMI), waist circumference (WC), and body fat percentage (BFP) were recorded for each subject. To determine aerobic fitness (VO2max), each participant performed a submaximal exercise test on a treadmill. HRR was calculated as the difference between peak heart rates post-exercise (HRmax) and heart rates at the first and second minutes of the recovery phase, recorded as HRR1 and HRR2, respectively.
Results: The mean VO2max and BMI of the participants were 48.32 ± 9.18 ml/kg/min and 27.10 ± 3.49 kg/m², respectively. No significant relationship was found between the HRR1 and HRR2 parameters and the variables of BMI, WC, and BFP in firefighters (p>0.05). However, positive significant relationships were detected between HRR1 and HRR2 and VO2max (p<0.05). A statistically significant negative relationship was found between VO2max and the variables of BMI, WC, BFP, and weight (p<0.05). These findings indicate that higher aerobic capacity is associated with better heart rate recovery and lower body fat percentage.
Conclusion: The results of this study demonstrate that cardiovascular autonomic function is significantly related to maximum aerobic fitness. However, no measure of body composition appears to affect the overall HRR response of the firefighters. This research provides important insights into how the aerobic capacity of firefighters affects their heart rate recovery responses. These findings offer a crucial foundation for improving the physical fitness levels and maintaining the cardiovascular health of firefighters.
Uso de ratios de gestion financiera en las micro y pequeñas empresas ferreteras
Authors: Perez Arana Denis Alejandro
Published: August 2024

The objective of this research is to determine the influence of the appropriate use of financial management ratios on the decision-making of hardware mypes in the Los Olivos district. There is commercial management by the owners and partners of the hardware business sector, in which they have a low application of financial metrics to be considered in their strategy and operation decision making. Empirical development and experience based on family legacies to move a business forward is not enough, but the use and applications of financial management indices professionalizes commercial management and places the company in an expectant position to meet its objectives and solid against the risks that arise. The lack of control and disorganization due to the number of items that are negotiated and that are often observed in this sector, are largely solved by the interpretation of ratios that help to propose and develop policies to follow. The incidence of the use of financial management ratios or early warning has a significant impact on decision making, being relevant and timely for those responsible for managing the company's business, in the case of hardware mypes, mainly for the owners and partners.
Factores sociodemográficos que determinan el emprendimiento en la macroregion norte del Perú
Authors: Condor Correa Ranjky , Laredo Ccollatupa Anthony Aldahir
Published: August 2024

El estudio tuvo como objetivo determinar los factores sociodemográficos personales que determinan el emprendimiento de negocios propios en la Macroregión norte del Perú. Metodológicamente tuvo un estudio cuantitativo, básico, explicativo, con un diseño no experimental. Asimismo, la muestra estuvo conformada por 30,183 y 30,673 viviendas particulares, respectivamente, correspondiendo 20,265 y 20,595 viviendas al área urbana y 9,918 y 10,078 viviendas al área rural tanto del año 2021 como 2022. Empleándose como técnica el análisis de datos de fuente secundaria, trabajado bajo un modelo probit. Los resultados denotaron que cuando el participante no ejerce el rol de jefe de hogar su capacidad de emprendimiento es de 0.79%, en comparación con aquellos que sí son jefes de hogar, que tienen una tasa de emprendimiento más alta en 2.42%. Asimismo, se resalta que la falta de empleo tampoco ha demostrado ser un factor para emprender un negocio en 95.95%, hallándose un vínculo significativo entre el emprendimiento hacia los demás factores analizados (p<0.05). En conclusión, el emprendimiento se ve afectado por una variedad de aspectos sociodemográficos, a diferencia del empleo actual.
Multivisceral metastases from choroidal melanoma: a case report
Authors: Arnaud Yonli yempabou Hugues , Jeddou Imane , Yaya-oye Djibril Adedoyin , Mouzari Yassine , Oubaaz Abdelbarre
Published: August 2024

Aim: To describe a case of choroidal melanoma metastasis. Case presentation: This is a case of a 39-year-old female patient diagnosed with choroidal melanoma of the right eye. Initial extension exam was negative; treatment consisted of enucleation of the tumor. The patient was subsequently lost. The evolution was marked by the appearance of multivisceral metastasis which were diagnosed at re-evaluation. The patient died after a short treatment of chemotherapy. Conclusion: choroidal melanoma is a rare disease with a severe prognosis that requires appropriate treatment and regular follow-up.
Evolution of Bentonites in the Presence of Ca2+ Ions in a Contact Solution and Sorption Capacity of Bentonites for 137Cs and 90Sr
Authors: Shabalin B.H.
Published: August 2024

The article presents the results of an experimental modelling of the influence of Са2+ ion concentration and pH of a model solution on the elemental composition and sorption capacity of natural (NB) and sodium-modified (SMB-20) bentonites from the Cherkasy deposit for 137Cs and 90Sr. The processes of the Cs and Sr sorption from multicomponent solutions with different pH, Eh and salt composition depend on the insoluble or sparingly soluble compounds precipitated on the bentonite surface. Based on the computer simulation data, it was found that small amounts of sediments, mainly oxides, hydroxides, Fe oxyhydroxides (hematite, goethite, limonite), and Ca carbonates (calcite, aragonite, dolomite) were present in the model solution with alkaline pH after adding CaCl2 solutions. Oxides and hydrated oxides of Fe, and calcium carbonates play an important role in the Cs and Sr sorption processes on bentonites. They can concurrently sorb radionuclides and block the sorption centres in montmorillonites. The concentration of the main structural elements (Si, Al) in the bentonites practically does not change with the increased pH and Ca2+ ion concentration in the model solution compared to the initial samples of NB and SMB-20, which indicates their structural stability. At the same time, an increase in the calcium concentration and a decrease in the sodium concentration were found in the ion-exchange complex of montmorillonite — the main bentonite mineral if compared to the initial samples. This can eventually lead to the transformation of SMB-20 bentonite from Na, Ca form to Ca, Na form. The 137Cs and 90Sr sorption on NB is shown to proceed more effectively, compared to SMB-20 in conditions of the increased pH and Ca2+ ion concentration. The results of this research may justify the bentonite clay application as a component of the isolating engineered barriers of radioactive waste disposal facilities.
Mineralogy of the Vovchansk Zircon-Rutile-Ilmenite Deposit (Ukrainian Shield)
Authors: Ganzha O.A.
Published: August 2024

The article provides generalized data on the geological structure, the results of laboratory analyzes of the heavy fraction of the main placer-forming minerals of the Vovchansk zircon-rutile-ilmenite deposit, which was being developed by Demurinsky Mining and Processing Plant LLC in 2002. The geological structure of the Vovchansk deposit includes a complex of Precambrian rocks of the crystalline basement, the Paleozoic-Cenozoic weathered crust, the Paleozoic-Cenozoic sediments, and Quaternary deposits. The industrial concentration of heavy minerals is confined to the middle and upper parts of the Middle Sarmatian subsuite of the Neogene, composed of fine-grained, essentially quartz sands, with a total thickness of 0.4 to 63 m. The content of heavy minerals in the ore-bearing horizon of the deposit ranges from 93.8 to 485 kg/m3 (ilmenite from 37.6 to 242.6 kg/m3, rutile from 15.9 to 64.6 kg/m3, zircon from 2.9 to 9.4 kg/m3, sillimanite and disthene from 20.4 to 117.5 kg/m3). The content of major and minor elements-impurities in individual minerals of the ore-bearing horizon (178 grains) was determined: ilmenite (18 samples), rutile (40 samples), zircon (35 samples), sillimanite (30 samples), staurolite (25 samples), tourmaline (12 samples), ganite (8 samples), monazite (10 samples). The conducted research clarified the typomorphic features of minerals from the sands of the Vovchansk deposit, established their absolute age and probable original sources.
Dravite of Terny Meteoritic Crater (Kryvyi Rih District)
Authors: Velykanova O.Yu. , Kryvdik S.G. , Vyshnevskyi O.A.
Published: August 2024

During mineralogical investigations of breccia and volcanic rocks of the Terny structure (Veseli Terny, Kryvyi Rih), so-called Terny meteoritic crater, the mineral tourmaline, previously unknown here, was found. Tourmaline crystals, with a length from 0.05 to 1.0 mm and more and up to 0.1—0.2 mm wide, are associated with quartz, potassium feldspar, graphite and apatite. The morphology and chemical composition of tourmaline were examined using optical microscope and EPMA in transparent thin sections. The tourmaline crystals are unusually parted along two transverse systems of microcracks oriented obliquely to the prism faces. EPMA reveals that tourmaline is dravite. The specific deformations of dravite and observed mineral associations probably indicate the rock formation under conditions of high pressures and temperatures of impact metamorphism. It is also confirmed by the presence of planar fractures in quartz.
Features of the Accumulation of Water-Soluble Fluoride in the Soils and Plants of the Carpathian Biosphere Reserve
Authors: Kryuchenko N.O. , Zhovinsky E.Ya. , Paparуga P.S.
Published: August 2024

The results of research on the content of water-soluble fluorine in the soils and vegetation of the Carpathian Biosphere Reserve (KBR) are presented. Analyzes were performed using a spectrometric spectrometer with alizarin-complexone on a Specol 11 spectrophotometer. Based on the results of statistical processing of the analysis, the limits and background content of water-soluble fluorine were established in soils on the plots: Yasynska — 0.1—1.34 mg/kg (background — 1.1 mg/kg); Rakhivska — 0.1—2.86 mg/kg (background — 1.4 mg/kg); Bohdanska — 1.34—1.9 mg/kg, (background — 1.6 mg/kg) (total background content — 1.34 mg/kg). It was determined that in the soils of the areas located in the zone of tectonic disturbance (v. Kvasy) the content of fluorine is greater than the background (1.35—1.4 mg/kg), its intake occurs together with mineral waters and gases. It was found that the maximum content of water-soluble fluorine (1.6—2.6 mg/kg) in in sod-podzolic soils (light and medium loamy) of the Marmaros massif, which is associated with increased humidity and the presence of kaolinite component of clay minerals, which does not bind fluorine into hard-to-reach compounds, subalpine) and the content of water-soluble fluorine in soils, at the same time, a weak negative relationship between the steepness of slopes (gentle, steep, precipitous) and the content of water-soluble fluorine in soils (the lower the steepness of the slope, the higher the content of water-soluble fluorine) was found. Biogeochemical properties for water-soluble fluorine (according to the biological absorption coefficient, Ax) of nine types of plants were established: evergreen conifers (pins and branches) — Táxus baccáta L. — 15.5; Thuja — 5, Abies alba — 5; birch family (branches and leaves) — Corylus avellana L. — 6.1, Alnus glutinosa (L.) P. Gaertn — 2.8; grasses (leaves and flowers) — Betonica officinalis L. — 4.6, Centauréa jacea — 6, Senecio vulgaris L. — 4.3, Filipendula ulmaria — 3.9. The concentrator of water-soluble fluorine is the pins and branches of the Taxus baccata L.
Analysis of the Faceted Topaz Market and Forecasting of Their Value
Authors: Indutnyi V.V. , Merezhko N.V. , Pirkovich K.A. , Kaluha N.V.
Published: August 2024

The results of the study of the Ukrainian market of faceted topaz are described. For this purpose, a special table of raw data on faceted topaz presented on Ukrainian Internet resources was compiled. The majority of topaz samples are characterized by moderate value indicators — up to 2,000 hryvnias per carat. On the graph of the distribution of logarithmic value indicators for faceted topazes, three areas are highlighted, which differ in the type of growth functions. It is shown that the construction of a mathematical model for forecasting the value of faceted topaz is expedient to be carried out within the second interval. A list of criteria for assessing the quality of topazes, as well as their ranking, is proposed. The projected specific indicators of the cost of faceted topazes in hryvnias per 1 carat are presented. A mathematical model is presented for forecasting the value of faceted topazes when solving the practical tasks of professional appraisers — assessing the economic feasibility of mining and processing these stones in Ukraine, as well as calculating their liquidity index. Four examples of determining the forecasted price for faceted topaz are considered, taking into account their liquidity indicator.