bluuebunny/crossref_metadata_2025 huggingface dataset:
Effect of Processing on Nutritional and Anti-Nutritional Composition of Urena Lobata Leaves
Authors: I Andrew
Published: October 2022

The proximate, phytochemical, mineral and vitamin composition of the processed urena lobata leaves were analyzed using Association of Official Analytical Chemist (AOAC) method, Arisa, Onwuka, Pearson, Harboure ,and Atomic Absorption spectrophotometry, Okwu and Josiah procedures respectively. This study is aimed at investigating the nutrition and anti -nutrition content of the leaves .The proximate analysis of the raw were 49.55% for moisture, 17.25% for crude protein, 7.44% for crude fibre, 7.95% for ether extract, 9.09% for Ash and 8.73% for carbohydrates. For oxalate, tannins, saponnins, alkaloids and flavonoids were 4.62mg/100g, 2.5mg/100g, 3.01mg/100g, 6.92mg/100g and 3.33mg/100g for respectively. While 48.13mg/100g for calcium, 34.77mg/100g for magnesium, 29.85mg/100g for sodium, 40.97mg/100g for zinc and 21.21mg/100g. And 1.95mg/100g for vitamin B1,1.06mg/100g for vitamin B2, 3.79mg/100g for vitamin B3 and 19.29mg/100g for vitamin C for raw respectively. The presence of some phytochemicals such as tannins, saponnins, alkaloids and flavonoids and some essential minerals proves that this leaves is a source for medicine
Validação do Conduct Disorder Screener entre jovens portugueses
Authors:   Universidade do Algarve, Portugal, Palma Victor Hugo , Pechorro Pedro ,   Universidade do Algarve, Portugal, Neves de Jesus Saúl , Nunes Cristina
Published: October 2022

Conduct Disorder (CD) may be related to persistent and severe delinquency be-haviors in adolescence. It can last into adulthood and be a precursor to Antisocial Personality Disorder. Considering the strong consensus regarding the need for prevention and early intervention in youths with CD, due to the negative impact they have on society, the Conduct Disorder Screener (CDS) can fill a significant gap in quickly obtaining relevant data on CD in adolescents and make an im-portant contribution to their research in our Country. The aim of the present study was to validate the CDS in a total sample of Portuguese adolescents (N = 601; M age = 15.95 years; SD = 1.05 years; range = 13-18 years) subdivided in forensic male group, school male group and school female group. The scale showed ade-quate psychometric characteristics, namely in terms of a one-dimensional facto-rial structure, internal consistency by Cronbach's alpha and Omega coefficient, convergent validity, divergent validity, criterion validity and known-groups va-lidity. Considering the obtained results, it is justified to use it in a forensic and school context to identify Conduct Disorder in Portuguese adolescents.
Reading Difficulty Viewed from Its Indicators in the Junior High School
Authors: Wigraha Ketut Agung Devara
Published: October 2022

This research aimed to analyze students' reading difficulties in understanding the descriptive text. This research applied descriptive qualitative research. The objects in this research were students' difficulties in the learning process in reading instruction of descriptive text, especially in finding the main idea or central theme, locating specific information, determining textual reference, and getting the meaning of a word or phrase. Students' sources of difficulties derived from the preliminary test results in understanding different descriptive texts, especially the main idea or central theme, specific information, textual reference, and word or phrase referential meaning of descriptive texts of a person, an animal, and a procedure. The subjects of this research were the seven grade students, consisting of 22 students in a class, and documents of students' test results were from difficulties in understanding descriptive texts of a person, an animal, and a procedure. The data were collected in the forms of primary and secondary data. The instruments used by the researcher to collect the data were the researcher as the main instrument, a non-objective test or short answer test consisting of 30 short answer questions related to descriptive texts of a person, an animal, and a procedure, and a focused group interview guide. The obtained data were analyzed descriptively. The results of this research show that students had difficulties in reading three descriptive texts based on reading indicators such as deducing the main idea or central theme, locating specific information, textual reference, and getting a word or phrase meaning. The sources of reading difficulties were identified by the researcher in an interview session with 5 representative students, namely having a limited vocabulary, lack of reading interest, lack of background knowledge or absence of knowledge, and the complexity of words or sentences in the text.
Implementing Hyperlink PowerPoint Media for Teaching English as a Foreign Language at Junior High School
Authors: Prayoga Kadek Agus , Padmadewi Ni Nyoman , Pratiwi Ni Putu Astiti
Published: October 2022

This study aims to analyze whether the use of digital media namely Hyperlink PowerPoint is affected or does not affect students' learning achievement. This research used mix method design which combines both quantitative and qualitative data collection. The population in this study was Junior High School with 2 samples, namely class VIIA and VIID. This study used a post-test-only control group design type. The scenario applied in this paper is described as one class (experiment group) was taught using digital media Hyperlink PowerPoint. On the other hand, the other class (control group) is taught using the conventional method. After several meetings, both classes were given a post-test. The post-test results were analyzed using SPSS 23 for t-test and size effect analysis to show if there was a significant difference between the two samples. The findings in this study are (1) The results of the T-test show that if the effect of the treatment using Hyperlink PowerPoint media gives significant achievement results to experimental students, the large difference measured using Cohen's size effect shows the number 0.051 or moderate category. (2) Results from the questionnaire showed positive results, namely: first, all students in the experimental group agreed with the use of Hyperlink PowerPoint media. Second, although there are 2 obstacles to the implementation, the activities can be carried out well. Third, after seeing the results found significant differences, the use of Hyperlink PowerPoint media deserves to be continually used as learning media.
Upaya Guru dalam Meningkatkan Kreativitas Berpikir Peserta Didik di Sekolah Dasar
Authors: Ni'mah Arifatun , Sukartono
Published: October 2022

Guru sangat kesulitan dalam menguji kreativitas berpikir pada peserta didik. Sarana prasarana masih minim, sehingga sangat mempengaruhi dalam proses kegiatan belajar mengajar. Hal ini dapat dilihat dari kurangnya minat peserta didik untuk berpikir kreatif saat guru melakukan kegiatan belajar mengajar di kelas. Tujuan penelitian ini yakni untuk menganalisis upaya guru dalam meningkatkan kreativitas berpikir pada pembelajaran peserta didik di sekolah dasar. Penelitian ini merupakan penelitian dengan menggunakan pendekatan kualitatif dengan jenis penelitian fenomenologi. Teknik pengumpulan data yang digunakan yaitu melalui wawancara, observasi, dan dokumentasi melalui uji keabsahan data, triangulasi sumber dan triangulasi metode. Teknik analisis data yaitu reduksi data, penyajian data, dan penarikan kesimpulan. Hasil penelitian menunjukkan bahwa ada beberapa kendala guru dalam meningkatkan kreativitas berpikir pada peserta didik yakni guru belum bisa memanfaatkan teknologi dengan baik, minimnya sarana prasarana, kemampuan guru yang masih rendah, dan guru kurang kreatif dalam membuat bahan ajar. Upaya yang dilakukan guru dalam menangani permasalahan yaitu dengan cara guru menghargai ide-ide yang disampaikan peserta didik, guru dapat merangsang kreativitas peserta didik saat pembelajaran, dan guru harus respek terhadap pertanyaan ataupun jawaban dari peserta didik. Implikasi penelitian ini diharapkan guru dapat menggunakan berbagai model, metode dan media pembelajaran dalam meningkatkan kreativitas berpikir peserta didik.
Dampak Penggunaan E-learning Berbasis Asesmen Proyek Terhadap Kemandirian Belajar dan Hasil Belajar Siswa Selama Pandemi Covid-19
Authors: Widiana I Wayan
Published: October 2022

Pembelajaran dilakukan dengan daring menyebabkan kegiatan belajar menjadi terbatas. Siswa mengalami kesulitan dalam belajar daring. Hal ini disebabkan karena siswa tidak dapat bertatap muka secara langsung dengan guru sehingga kesulitan dalam memahami materi pembelajaran. Tujuan penelitian ini yaitu menganalisis kajian mengenai dampak penggunaan E-learning berbasis asesmen proyek terhadap kemandirian belajar dan hasil belajar siswa selama pandemi covid-19. Penelitian ini merupakan penelitian kuasi eksperimen dengan desain eksperimen posts test only control group design. Populasi pada penelitian ini berjumlah 60 siswa. Pengambilan sampel dilakukan dengan teknik random sampling sederhana. Metode yang digunakan dalam mengumpulkan data yaitu observasi, wawancara, dan tes. Instrumen yang digunakan dalam pengumpulkan data yaitu kuesioner dan lembar soal tes. Teknik yang digunakan untuk menganalisis data yaitu analisis deskriptif dan inferensial. Pengujian hipotesis dilakukan dengan menggunakan analisis Manova, yang didahului dengan prasyarat analisis yang meliputi uji normalitas, homogenitas, dan lineritas valiabel terikat. Hasil penelitian menunjukkan bahwa nilai signifikasi analisis Manova sebesar 0,000 (<0,05). Hal tersebut berarti bahwa secara simultan dan parsial terdapat pengaruh penggunaan e-learning berbasis asesmen proyek terhadap kemandirian dan hasil belajar siswa selama pandemi covid-19. Oleh sebab itu, penggunaan e-learning berbasis asesmen proyek dapa dijadikan rujukan penyelenggaraan pembelajaran selama masa pandemi covid-19.
Bahan Ajar Model Pembelajaran Sejarah Berbasis Karakter pada Siswa
Authors: Nasution Burhanuddin , Insan Fahmi Siregar  , Nursiah Hasibuan
Published: October 2022

Mulai menurunnya karakter peserta didik yang berdampak terhadap hasil belajar menuntut pendidik menciptakan pembelajaran berkualitas. Menciptakan pembelajaran yang berkualitas dibutuhkan sebuah bahan ajar yang sesaui dengan kebutuhan. Penelitian ini bertujuan untuk menganalisis efektifitas bahan ajar model pembelajaran sejarah berbasis karakter pada siswa. Jenis penelitian pengembangan dengan model ADDIE  namun pada penelitian ini hanya melakukan uji efektivitas. Subjek penelitian adalah siswa dengan jumlah 68 dibagi menjadi dua kelas 34 kelas kontrol dan 34 kelas eksperiment. Metode pengumpulan data yang digunakan adalah tes hasil belajar. Analisis data yang digunakan Gain-skor. Hasil penelitian menunjukkan bahwa bahan ajar model pembelajaran sejarah berbasis karakter efektif meningkatkan hasil belajar siswa. Hal ini dilihat dari nilai rata-rata hasil belajar yang berbeda antara kelas eksperimen dan kelas kontrol, dimana nilai rata-rata hasil belajar siswa kelas ekperiment lebih tinggi dari kelas kontrol. Sehingga dapat direkomendasikan penggunaan bahan ajar sebagai salah satu sumber belajar pembelajaran sejarah.
Microhardness and Dynamic Yield Strength of Copper Samples upon Impact on a Rigid Wall
Authors: Pakhnutova N. V. , Boyangin E. N. , Shkoda O. A. , Zelepugin S. A.
Published: October 2022

Introduction. One of the commonly used methods for assessing the dynamic characteristics of a material is the Taylor test, which establishes the relationship between the dynamic yield strength of a cylindrical sample material and its length after hitting a non-deformable barrier. The purpose of this work was to study the microhardness and determine the dynamic yield strength of copper samples for various impact velocities in the Taylor test.

Materials and Methods. Experiments were carried out with cylindrical copper (M1) samples. The throwing conditions were selected on the ballistic stand, which provided the speed of the sample in the range of 150–450 m/s at the exit from the barrel. After the impact, the microhardness of the samples in the section plane was measured. The calculation of the dynamic yield strength was carried out according to the classical Taylor formula.

Results. Experimental data are presented for cylindrical copper samples upon impact on a rigid wall with velocities in the range of 162–416 m/s, including configurations and sizes of images before and after impact. Microhardness distributions in the axial section of the samples were obtained. For each sample, the dependences of the averaged values of microhardness were constructed, which made it possible to identify four areas of deformation of the samples (the area of elastic deformations, plastic deformations, intense plastic deformations, the area of the material undergoing destruction) and determine their sizes. The dynamic yield strength of copper in the studied range of impact velocities was calculated.

Discussion and Conclusions. The values of microhardness in the entire considered region and for all studied impact velocities exceeded the initial value. There was a significant increase in the value of the dynamic yield strength compared to its static value. The correlation of the maximum averaged values of microhardness and dynamic yield strength, which grew with increasing impact velocity, was identified.
TEACHER’S COPING BEHAVIOR: RESOURCE APPROACH
Authors: Ледовская Татьяна Витальевна
Published: October 2022

Преподавание в школе, возможно, является одной из самых стрессовых профессий, которая ежедневно ставит перед учителями многочисленные задачи. Источники стресса в педагогической деятельности уникальны для каждого учителя, но в целом относятся к организационному, межличностному или личному уровням. Использование той или иной стратегии совладания со стрессом зачастую обеспечивается ресурсами психики, которые расширяют зону деятельности человека, помогают преодолевать трудности, достигать цели. В исследовании принял участие 101 педагог средней общеобразовательной школы. При обработке результатов использовался корреляционный, структурный, дисперсионный и сравнительный анализы. В целом педагоги демонстрируют умеренное использование всех стратегий совладания со стрессом. Менее опытные педагоги справляются со стрессовыми ситуациями с помощью социальной поддержки, а более опытные используют положительную переоценку. Психологическая структура совладающего поведения педагогов оказывается высокоразвитой, в ней образуются связи различного уровня значимости. Базовыми копинг-стратегиями оказываются дистанцирование и самоконтроль. Определена роль некоторых личностных ресурсов совладания со стрессом у педагогов: жизнестойкости и ее компонентов, личностной тревожности, интернального локус-контроля, самооценки и эмоциональной устойчивости.

Teaching is one of the most stressful professions, and it poses numerous challenges to teachers on a daily basis. Sources of stress in teaching activities are unique to each teacher, but generally refer to organizational, interpersonal, or personal levels. The use of this or that strategy of coping with stress is often provided by the resources of the psyche, which expand the zone of human activity, help to overcome difficulties, achieve the goal. At various stages of the study, a total of 101 secondary school teachers took part in it. Correlation, structural, and comparative analyses were used in processing the study results. In general, educators demonstrate moderate use of all coping strategies. Less experienced educators deal with stressful situations with social support, and more experienced ones mobilized other strategies (positive reassessment). The psychological structure of the coping behavior of teachers turns out to be highly developed; connections of various levels of significance are formed in it. The basic coping strategies are distancing and self-control. The role of some personal resources of coping with stress in teachers has been determined: resilience and its components, personal anxiety, international locus of control, self-esteem and emotional stability. Personal qualities that influence coping strategies are a resource of predominantly avoidant and maladaptive coping strategies.
INFLUENCE OF REFLEXION ON THE OPERATIONAL METHODS OF STUDENTS’ MENTAL STATES SELF-REGULATION
Authors: Прохоров Александр Октябринович , Чернов Альберт Валентинович , Юсупов Марк Геннадьевич
Published: October 2022

В статье представлены результаты исследования роли различных видов рефлексии в регуляции психических состояний студентов в ходе учебной деятельности. Показано, что современные исследования в данной области носят фрагментарный характер и не раскрывают целостного механизма ментальной регуляции психических состояний человека. В рамках данной проблемы особо выделяется роль рефлексии как важнейшей детерминанты в регуляции состояний, как опосредующего звена в выборе оптимальных способов и приемов регуляции состояний. Исследование проводилось в группах студентов психологов и математиков 4-го курса, а вся совокупность испытуемых была разделена на три группы по уровню выраженности рефлексивности на низко-, средне- и высокорефлексивных студентов. В результате исследований было установлено, что влияние рефлексии на операциональные средства саморегуляции выше при более напряженных формах учебной деятельности. Выявлены ведущие формы рефлексии во взаимосвязи со способами саморегуляции психических состояний на лекциях, семинарах и экзаменах. Результаты исследований позволят в дальнейшем раскрыть значение рефлексии в целостном регуляторном процессе жизнедеятельности субъекта.

The article presents the study results of various types of reflection influence on the mental states of students in the course of educational activities. The authors show that modern research in this area is fragmentary and does not reveal the integral mechanism of mental regulation of human psychological states. Within the framework of the problem, highlighted the role of reflection as the most important determinant in the regulation of states, as a mediating link in the choice of optimal methods and techniques for regulation of mental states. In the course of the study, we used various methods of reflection, mental states and regulatory abilities study. The study conducted in groups of 4th year students of psychologists and mathematicians, and the entire population of subjects divided into three groups according to the level of reflexivity into low-, medium- and high reflexive students. Found that the influence of reflection on the operational methods of self-regulation is higher in more intense forms of learning activity. Revealed the leading types of reflection in connection with the methods of mental states’ self-regulation at lectures, seminars and exams. The results of the research will reveal the importance of reflection in the integral regulatory process of the subject’s life.
TEACHING MATHEMATICS TO COLLEGE STUDENTS THROUGH GEOGEBRA CLASSROOM ON THE EXAMPLE OF THE TOPIC “COMPLEX NUMBERS”
Authors: Бочкарёва Даниэла Владимировна
Published: October 2022

Применение информационных технологий в процессе обучения уже стало обыденностью, но постоянно появляются какие-то новые инструменты, помогающие педагогу и обучающимся. Чтобы образование действительно соответствовало запросу современных реалий, необходимо непрерывно модернизировать формы и методы обучения. Одним таким весьма актуальным помощником в обучении математике является система динамической математики (СДМ) GeoGebra. Математика всегда занимала особое место среди наук хотя бы потому, что она весьма абстракта и сложна для восприятия. Просто заучить формулы и определения недостаточно, а точнее сказать, бессмысленно. Нужно понимать суть и уметь пользоваться полученными знаниями. Поэтому имеется необходимость в наглядности математических понятий для более подробного их рассмотрения и осознания, для чего и используются СДМ. Также стоит подтвердить целесообразность их применения. Цель данной статьи заключается в предоставлении результатов исследования влияния использования среды GeoGebra Classroom на качество обучения на примере темы «Комплексные числа», изучаемой студентами колледжа в курсе высшей математики.

The use of information technology in the learning process has already become commonplace, but new tools are constantly appearing to help the teacher and students. In order for education to really meet the demand of modern realities, it is necessary to continuously modernize the forms and methods of education. One such highly relevant assistant in teaching mathematics is the Dynamic Mathematics System (DMS) GeoGebra. Mathematics has always occupied a special place among the sciences, if only because it is very abstract and difficult to understand. Just memorizing formulas and definitions is not enough, or rather, it makes no sense. You need to understand the essence and be able to use the knowledge gained. Therefore, there is a need for the visibility of mathematical concepts for their more detailed consideration and understanding, for which DMS are used. It is also worth confirming the feasibility of their use. The purpose of this article is to present the results of a study of the impact of using the GeoGebra Classroom on the quality of education on the example of the topic “Complex Numbers” studied by college students in the course of higher mathematics. It was revealed that the use of Dynamic Mathematics Systems in classroom and homework has a positive effect on student’s academic performance.
The Impact of Culture on Employees’ Performance: The Case of Lebanese Companies
Authors: Tannoury Jessica
Published: October 2022

Organizational culture is well-documented in the literature for its impact on company performance and its role in creating competitive advantages for companies. Organizational culture has long been acknowledged as a significant aspect in the analysis of organizations in many situations. An organization's culture serves as an integrated way of controlling members' behavior and as a particular catalyst for the organization's growth and development culture is an essential part of every facet of organizational life. As a result, a company's culture shapes how people think, work, and feel about their job and the business as a whole. Sampled respondents were surveyed with the use of a survey tool. A questionnaire served as the tool. Using the instrument ensured that data was collected in a consistent manner. The six sections of the survey were designed to answer the research questions. The study's target demographic was the Premium Shopping Center's 500 workers. A study's sampling frame is a list of all the research population's components that will be taken into account throughout the investigation. There are 11 divisions within the corporation, with four of their divisions situated in Beirut. The list of 500 workers of Premium Shopping Center served as the study's sample frame. However, only 250 respondents answered the questionnaires. Likert scale questions were used for the closed-ended questions. To elicit even more information from the participants, open-ended questions were used. The research demonstrated that a cooperative work environment had a positive impact on performance because of the existence of a supportive work environment. The research found that psychological safety is fostered by helpful and trustworthy interpersonal interactions as well as supportive management.
Assessing The Costs and Benefits of Adopting Solar Energy on The Bottom Line in The Lebanese Foodservice Industry: Owners’ And Managers’ Perspectives
Authors: Wazni Imad
Published: October 2022

Electricity provides various benefits to the economy, including the availability of electrical gadgets and improved lighting. Therefore, the loss of power is seen as a major setback, particularly in Lebanon. It would be incredibly challenging to provide modern energy such as electricity to light a room, cook a meal, or operate a restaurant. Restaurants in Lebanon either lack access to or cannot afford to pay for reliable sources of electricity. This means that individuals in Lebanon are able to pay for and make use of the newly accessible electricity. Convenience sampling is used when a researcher has ready access to the population from which to draw a sample. A wide range of managers participated in this poll. In Lebanese settings, only 300 out of 350 requested survey participants showed up. People who care about the environment are more likely to buy renewable energy. In general, advocates for the use of renewable energy sources tend to be those who are environmentally sensitive and who feel a personal commitment to safeguarding the earth. Customers' concern for the environment may affect their purchasing decisions, but this effect is likely to be moderated by other factors. Strong environmental values improve a consumer's tendency to purchase eco-friendly goods. Managers who care about doing the right thing are more likely to buy environmentally friendly products. In addition, ecoaware executives are more likely to invest in sustainable power plants. Customers that care about the environment and are knowledgeable about environmental issues are more likely to make purchases that are good for the planet.
Blockchain in Supply Chain Management
Authors: Singh Chetanpal , Thakkar Rahul , Warraich Jatinder
Published: October 2022

For the past few years, the market has changed a lot and it has become dynamic and demanding which has put the market into a competitive environment. The supply chain plays a crucial role to adapt the business to the dynamic environment as it is very reliant on collaboration integration as well as flexibility. The applications related to the supply chain have gotten the attention of many business owners and to improve the flow control of the supply chain many specialized applications are implemented. One of the most important new technological applications in the supply chain is blockchain technology which has garnered the attention of many business owners as it can be quickly adapted to dynamic market conditions and in the business environment. One upon reading this will get to know about the effect of blockchain technology utilization on this field. The results of the research paper recommend that companies invest in blockchain technology so that the supply chain becomes more transparent, flexible, and secure. There is no doubt in the fact that blockchain technology plays an important role in developing trust with the stakeholder of the supply chain. In the end, the research paper has also given some considerations on the implications that are positive as well as the potential of the blockchain in the field of collaboration and integration.
TEACHING ESP USING MYKLASS IN UNIVERSITAS MUHAMMADIYAH YOGYAKARTA: STUDENTS’ PERCEPTION
Authors: Farahsani Yashinta , Harmanto Margaretha Dharmayanti
Published: October 2022

Many non-English departments study English for Specific Purposes (ESP) to improve students' vocabulary related to their field. UMY has established a program called MyKlass as a facility to do online learning. This program provides many features, such as sharing materials in the form of documents, pictures, or media; conducting quizzes; assignment submission; and attendance. However, teaching ESP using MyKlass also faces some difficulties such as students' motivation to read the material, the teacher's control in evaluating students' study progress, and students' problem in improving English vocabulary in specialized language. Using a questionnaire distributed to 234 Accounting and Mechanical Engineering students, the writers found out the students' perception of using MyKlass from their motivation and perception in learning ESP using MyKlass, their perception of the aspects of benefits, and their perception of learning ESP Using MyKlass. Most of the answers showed positive responses; therefore, we can conclude that ESP online learning using MyKlass has been very beneficial to the students regardless of the technical problems that students sometimes encounter.
Methodology of determining the metabolomic profile of tumor-associated macrophages and monocytes in oncological diseases
Authors: Frankevich VE , Novoselova AV , Starodubtseva NL , Patysheva MR , Larionova IV , Rakina MA , Bragina OD , Kzhyshkowska JG
Published: October 2022

Breast cancer is the leading cause of cancer-related death among women worldwide. Tumor-associated macrophages (TAMs) constitute the primary component of innate immunity in breast cancer tissue. During the development of new approaches for breast cancer treatment aimed at editing the epigenome of TAM, precise methods for the analysis of macrophage metabolome are required to examine the effect on new approaches on macrophage metabolism. Our study aimed to develop an HPLC-MS/MS-based analytical approach to characterize the metabolome of human innate immune cells (TAMs and their precursors, monocytes). Analysis of lipid extracts was conducted on a Dionex UltiMate 3000 liquid chromatograph connected to a Maxis Impact qTOF mass analyzer with an ESI ion source. Quantitative analysis of 38 amino acids in the cells was conducted using the Jasem Amino Acids LC-MS/MS Analysis Kit and an HPLC-MS/MS chromatographic system consisting out of an Agilent 6460 triple quadrupole mass spectrometric detector (Agilent), and an Agilent 1260 II liquid chromatograph (Agilent ) with Amino acids-HPLC Column (Jasem). The modified Folch method with double extraction was found to be the optimal approached for the sample preparation, since it enables to simultaneously isolate the lipid extract and water-soluble substances, in particular, amino acids. The method of reversed-phase chromatography yielded more useful data on the cell lipid composition than the method of hydrophilic interaction liquid chromatography (HILIC). The minimum number of cells required to determine the metabolome of immune system cells (TAM and monocytes) was identified as 2 × 106. Thus, we have developed the approach to determine the lipid and amino acid composition of modelled human TAMs and primary monocytes isolated out of breast cancer patients using minimal amount of clinical material.
Presumed population immunity to SARS-CoV-2 in South Korea, April 2022
Authors: Jang Eun Jung , Choe Young June , Choe Seung Ah , Kim Yoo-Yeon , Kim Ryu Kyung , Kim Jia , Lim Do Sang , Lee Ju Hee , Yi Seonju , Lee Sangwon , Park Young-Joon
Published: October 2022

Objectives: We estimated the overall and age-specific percentages of the Korean population with presumed immunity against severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) as of April 2022 using the national registry. Methods: We used the national coronavirus disease 2019 (COVID-19) infection and vaccination registry from South Korea, as described to define individuals with a previous history of COVID-19 infection, vaccination, or both, as persons with presumed immunity.Results: Of a total of 53,304,627 observed persons, 24.4% had vaccination and infection, 58.1% had vaccination and no infection, 7.6% had infection and vaccination, and 9.9% had no immunity,. The SARS-CoV-2 Omicron variant emerged at a time when the presumed population immunity ranged from 80% to 85%; however, nearly half of the children were presumed to have no immunity.Conclusion: We report a gap in population immunity, with lower presumed protection in children than in adults. The approach presented in this work can provide valuable informed tools to assist vaccine policy-making at a national level.
MEMPERTIMBANGKAN ANALISIS GENDER DALAM DISKURSUS FIKIH: SEBUAH UPAYA BAGI KONTEKSTUALISASI FIKIH ISLAM
Authors: Panessai Darwin , Harun Ubay , Nur Hayyun
Published: October 2022

As many studies have been done on fiqh discourse from a feminist perspective, most of them conclude that in terms of the ontological position and sociological role of women are spoken, fiqh books in the classic era and the post-era have the same dominant ideas that are the trend towards placing women in an instrumental rather than a substantial position. Therefore, the study of fiqh using gender analysis as an analytical knife is an urgent alternative study to be carried out immediately.
Introduction to Modelling the Correlation Between Grain Sizes of Feed Material and the Structure and Efficiency of the Process of Co-Rotating Twin-Screw Extrusion of Non-Flammable Composites with a Pla Matrix
Authors: Fiedurek Kacper , Szroeder Paweł , Macko Marek , Raszkowska-Kaczor Aneta , Borowicz Marcin , Puszczykowska Natalia
Published: October 2022

Co-rotating twin-screw extrusion is an energy consuming process that is generally not fully optimised to a specific polymer. From the point of view of the efficiency of the extrusion process, the starting material should be characterised by small grain sizes in comparison to the screw channel area, small surface area to volume ratio and small internal friction between the pellets. To develop a model describing the effect of polylactide (PLA) grain size on the extrusion efficiency, a series of experiments with a twin-screw extruder were carried out during which the energy consumption; torque on shafts and temperature of the melt on the extruder die were monitored. As feed material, both the neat PLA with different grain sizes and the PLA with expandable graphite fillers and phosphorous-based flame retardants were used. Morphology and dispersion quality of the composites were examined using scanning electron microscopy (SEM); flammability, smoke production, mass loss and heat release rates were tested using cone calorimetry; and melt flow rate was determine using a plastometer. Moreover, the thermal properties of the obtained composites were determined using differential scanning calorimetry (DSC). The results show that the choice of the starting material affects both the efficiency of the extrusion process and the flame retardancy properties of the composite materials.
Influence of Extruder Plasticizing Systems on the Selected Properties of PLA/Graphite Composite
Authors: Kaczor Daniel , Bajer Krzysztof , Domek Grzegorz , Madajski Piotr , Raszkowska-Kaczor Aneta , Szroeder Paweł
Published: October 2022

Twin-screw extrusion is a crucial method for the direct inserting of carbon micro- and nanomaterials into a polymer matrix using a dry procedure. The study aimed to determine the influence of the parameters of the twin-screw extruder plasticizing system on the dispersion homogeneity and distribution of graphite filler in the polylactide polymer matrix and overall quality of the composite. As a filler, a graphite micropowder with a 5 μm lateral size of platelets was used at concentration of 1 wt.%. Three configurations of screws with different mixing intensity and various types segments were considered in the extrusion experiments. Morphology and chemical structure of the obtained composites were examined using scanning electron microscopy (SEM), Fourier transform infrared spectroscopy – attenuated total reflectance (FTIR-ATR) and Raman spectroscopy. Differential scanning calorimetry (DSC) and melting flow rate measurements (MFR) were used to asses thermal and rheological properties of the composites. Samples of the polylactide/graphite composites were also subjected to mechanical tests. The results show that the selection of the mechanical parameters of twin-screw extruder plasticizing system plays a key role in the preparation of the homogeneous PLA/graphite composites. Incorrect selection of the screw geometry results in poor mixing quality and a significant deterioration of the mechanical and thermal properties of the composites. Optimised mixing and extrusion parameters can be the starting point for the design of efficient twin-screw extruder plasticizing system for fabrication of PLA composites with carbon nanotube and graphene fillers.
Current status of predoctoral implant dentistry education – student’s didactic performance and self-assessment: A Systematic Review.
Authors: Nagpal Disha , Flores-Mir Carlos , Nassar Usama , Levin Liran
Published: October 2022

Objectives: To describe the current state of predoctoral dental implant education in terms of educational outcomes and the student’s perception of the associated curriculum. Methods: A database search was conducted using Medline (OVID), EMBASE, ERIC (Education Resources and Information Centre) and Web of Science electronic sources. Two reviewers thoroughly reviewed the papers in accordance with the specific selection criteria after carefully choosing the abstracts that seemed to meet the initial selection criterion for full article retrieval.

Results: 15 articles were included, which were divided into two distinct groups: those that addressed educational outcomes and those that addressed students’ perceptions. Knowledge was assessed by questionnaire surveys, and it was found that most of the students were poorly to moderately well informed. There was a positive increase in student perception after taking the implant courses.

Clinical significance: Although predoctoral education in most dental schools across the world now includes implant dentistry as a core component, the degree of integration varies greatly. To increase the proficiency of predoctoral students around the world in performing implant treatments, it is necessary, according to this systematic review, to create a uniform, well-structured predoctoral implant curriculum and guidelines that include didactic, laboratory, preclinical, and clinical components.
Actualization of Semi-Empirical Equation for UV Index
Authors: Vasi Adriana , Stefu Nicoleta
Published: October 2022

UV radiation at ground level undergoes many variations in the present, due to the ozone column, aerosols, clouds, surface reflectivity, both positive and negative variations, depending on latitude.

This work reports on the updating of the semi-empirical equation proposed by Madronich in 2007 for estimating the UV index, by updating its coefficients, as they encapsulate the state of the atmosphere. Data for Bucharest in 2019-2021 was used for fitting the equation. It was found that the new equation improves the accuracy of the estimation of the UVI in Bucharest five times for 2021 (from nRMSE = 17.3% to nRMSE=3.3%). The validity of the obtained equation was assessed in various locations, showing a great improvement of the estimation accuracy in most of them (in 12 of the 14 chosen locations), regardless of latitude. The equation produces a negative bias for locations having Koppen climate types A and B, a positive bias for the investigated locations situated in climate type D and no definite bias for temperate climates (type C). More studies are needed for drawing a definite conclusion and further improving the applicability of the equation.
Effect of Indian folk-dance therapy on physical performances and quality of life in elderly
Authors: Mishra Siddharth S. , Shukla Shivani
Published: October 2022

Study aim: To study the effect of Indian folk-dance therapy on physical performances and quality of life in elderly.

Material and methods: Forty healthy seniors with age between 60–70 years were randomly allocated into two group; Group A: Indian folk-dance therapy and Group B: Conventional therapy. Both the groups received 60 minutes session, five sessions a week for six weeks.

Results: Inter-group analysis showed significant improvements in Group A in Fullerton advanced balance scale (Z = –2.91, p < 0.01; Montreal cognitive assessment scale (T = 4.77, p < 0.01); single leg stance with eyes open (Z = –2.07, p = 0.03); eyes closed Z = –2.12, p = 0.03), 6 min walk distance (Z = –3.03, p < 0.01) and SF 36 (physical component) (T = 2.38, p = 0.02) and SF 36 (mental component) (T = 2.42, p = 0.02).

Conclusion: Indian folk-dance therapy showed significant improvements in static and dynamic balance, reduced risk of fall, improved cognitive function, improved physical functioning and quality of life than conventional therapy among elderly individuals.
Acute Thrombosis of the Left Main on the Tennis Court in a Young Patient – a Case Report
Authors: Mihăilă Theofana , Roșca Aurelian , Ion Bianca
Published: October 2022

In acute coronary syndromes, timely revascularization of the obstructed artery is crucial. In young patients, acute myocardial infarction can have a very severe evolution and is frequently associated with cardiogenic shock. We present the case of a 36-year-old male patient, smoker with no other apparent risk factors for coronary artery disease, who suffered a cardiac arrest while playing tennis. Emergency coronary angiography revealed acute occlusion of the left anterior descendent artery, which was promptly revascularized. The patient had a good clinical evolution and was discharged after six days. The case underlines the importance of a well-functioning emergency system and STEMI network, able to provide life-saving therapy in a timely manner.
Evaluation of Ribes Rubrum Cultivars in Estonia
Authors: Sepp Toivo , Rätsep Reelika , Libek Asta-Virve , Kikas Ave
Published: October 2022

The evaluation of cultivars of red and white currant (Ribes rubrum L.) was carried out in 2019–2020 at the Polli Horticultural Research Centre of the Estonian University of Life Sciences, South-Estonia. The aim of this study was to estimate traits of red and white currant cultivars of both Estonian and introduced origin. An evaluation plot was established in the autumn of 2016. During two consecutive years (2019–2020), 11 promising cultivars were evaluated for the beginning of flowering and fruit ripening, winter hardiness, resistance to diseases (expressed in scores 1–9), yield per bush, fruit weight, drop of flowers and premature berries, as well as the content of the soluble solids (°Brix), titratable acids, ascorbic acid, total phenols and total anthocyanins. The highest yield was determined in cultivars ‘Bayana’ and ‘Viksnes’, while cvs. ‘Rovada’, ‘Jonkheer van Tets’, ‘Kurvitsa 4’ and ‘Valko’ had larger berries. The highest soluble solid content was found in the berries of red currant ’Krameri punane’ (13.8 °Brix) and white currant ’Bayana’ (12.4 °Brix).
New Strawberry Cultivars for Growing in High Tunnels
Authors: Kalniòa Ieva , Strautiòa Sarmīte , Laugale Valda
Published: October 2022

Strawberry growing in high tunnels is widely used in many countries and the area under cover is increasing. Usually, early ripening cultivars are planted in high tunnels to obtain even earlier yield in the season. In this investigation, several new strawberry cultivars and one hybrid (of Dutch breeding) with medium and late ripening time were evaluated for growing in high tunnels in soil. The trial was established in 4 August 2016 in a FVG type tunnel (60 × 4 × 3.35 m). Frigo plants of the following categories of cultivars and hybrids were used in the investigation: ‘Sonata’ (A) and ‘Sonsation’ (A+) of medium ripening time; ‘Faith’ (A+) and hybrid 09-90s-05 (A) of late ripening time; ‘Malwina’ (A+) and ‘Magnus’ (A) of very late ripening time. The plants were grown on raised beds covered with black plastic mulch in double rows with drip irrigation. Soil type was heavy loam. Plant survival after winter, productivity potential, yield, fruit size, the ratio of high quality to damaged fruits in the crop, fruit sensory characteristics, shelf life and biochemical content after freezing were evaluated. According to three-year evaluation results, ‘Sonsation’ had better fruit quality and resistance to crown diseases than ‘Sonata’ and can be considered appropriate for yield forcing in high tunnels. Hybrid 09-90s-05 and ‘Faith’ are not appropriate for growing in high tunnels in heavy soils. Hybrid 09-90s-05 had good yield, but medium fruit quality and low taste score, and it was susceptible to grey mould. ‘Faith’ had low productivity potential and fruits of medium taste. The very late ripening cultivars ‘Malwina’ and ‘Magnus’ had low productivity in all evaluation years, probably because of too heavy soil.
Results of Propagation of Three Cultivars of Japanese Quince (Chaenomeles Japonica)
Authors: Kaufmane Edīte , Ruisa Silvija , Kārkliņa Katrīna
Published: October 2022

The aim of the trial was to determine the optimal propagation methods for three Japanese quince cultivars. Rooting trials with cultivars ‘Darius’, ‘Rasa’, and ‘Rondo’ were conducted in 2017–2019 in a greenhouse, to investigate the rooting and shoot quality of softwood cuttings, using different treatments. At the beginning of fruit production, growth and amount of the first yield was evaluated depending on propagation method. Softwood cuttings of Japanese quince rooted well (average 82–93%) in a greenhouse with heated substrate and partly automated temperature and moisture control, in spite of different weather conditions during three vegetation periods. The best results for rooting were found for cultivar ‘Rondo’. On average, better results of rooting for all cultivars were obtained when cuttings were soaked in indolylbutiric acid solution and trichodermin was added to the substrate. Significant differences in length and diameter of the bush shoots found between years for both propagation methods and also between years for one type of propagation. On average, microproagated plants had the highest shoot length. After evaluating the first yield, no significant differences were found between cultivars during the first two trial years, but micro-propagated plants had significantly higher yield per bush.
Life Cycle Assessment for Olive Production: A Case Study for the Region of Trás-os-Montes, Portugal
Authors: Brito Thyago , Fernandes-Silva Anabela
Published: October 2022

The olive tree (Olea europaea L.), widely cultivated in the Mediterranean countries for olive oil and table olive production, has an important economic role. In the age of climate change, it is crucial to know the importance of environmental impacts associated to the production system. Thus, the aim of this study was to characterise the environmental impacts of a semi-intensive olive orchard drip irrigated with ground water, located in the Northeast Region of Portugal. Life cycle analysis was conducted according to ISO 14040. We used openLCA software, the Agribalyse V. 3 database, and a cradle-to-gate analysis in the impact assessment (Recipe Midpoint (H) V1.13). In the climate change category, the results indicated that for production of 1 kg olives, a total of 0.249 kg CO2-Eq. were emitted to the atmosphere. Regarding the direct impact of production system, a total of 0.177 kg CO2-Eq. (71.5%) were emitted, followed by indirect impacts associated with raw material of the irrigation system (0.032 kg CO2-Eq. total, 12.7%), and electricity needed to pump ground water (0.012 kg CO2-Eq., 4.8%). In relation to inputs for production, the raw material for urea production contributed 0.013 kg CO2-Eq. (5.0%) of total emissions. To the best of our knowledge, this study was the first carried out in this region, and contributes to a better understanding of environmental impacts that will allow their minimisation and ensure olive orchard sustainability.
Mechanical Thinning Improves the Consistency of Flowering and Yield in Apple Production
Authors: Rubauskis Edgars , Udalovs Dāniels , Borisova Indra
Published: October 2022

Most apple cultivars tend to bear biennially, i.e. produce many fruits in one and few fruits in the next year, or do not have a nature of self-thinning. The effectiveness of chemical thinning depends on conditions, particularly temperature, at the time of application. In some other fruit-growing regions, the mechanical thinning of flowers is adapted to some cultivars by changing the speed of moving and rotation of the mechanisms to conduct partial thinning — removing of flowers. The investigation aimed to evaluate the effectiveness of total flower removal mechanically on one side of the tree row, and on the other side the next year, during the full production period (8th to 12th year after planting) to obtain regular yields. Seven cultivars on dwarfing rootstocks M.9 and B.396 were compared. Apple trees on the dwarfing rootstock B.396 were less affected by biennial yielding. Cultivars had a strong relation to yield — ‘Gita’ (Vf), ‘Konfetnoye’ and ‘Kovalenkovskoye’ had less fluctuation yearly, while ‘White Transparent’, ‘Rubin’ (Kazah.), ‘Antei’, and ‘Ligol’ performed opposite. There was a positive influence observed on reduction of periodicity by mechanical flower thinning, however, there is a discussion on cumulative yield reduction.