bluuebunny/crossref_metadata_2025 huggingface dataset:
Synthesis of Graphene Nanoplatelet-Alginate Composite Beads and Removal of Methylene Blue from Aqueous Solutions
Authors: CİVAN ÇAVUŞOĞLU Ferda
Published: March 2023

The discharge of various types of wastewater into natural streams leads to significant problems by increasing the toxicity of the wastewater. For this reason, methods and materials are being developed by researchers in line with effective, economic, and environmental principles. In this study, the removal of methylene blue, a toxic dyestuff, from aqueous solutions was investigated by synthesizing sodium alginate (SA) and graphene nanoplatelet-sodium alginate composite (SA-GNP) beads. The structural characteristics of the materials were analyzed using FTIR, TGA, optical microscope, and SEM methods. All parameters determining the efficiency of the methylene blue adsorption system were optimized in a batch system. The effects of various factors, such as adsorbent amount, contact time, adsorption temperature, dye concentration, solution pH, pHzpc values of SA and SA-GNP beads, presence of different ions, and beads swelling, on the adsorption process, were investigated. To investigate the mechanism of the adsorption system, the adsorption data were fitted to a non-linear form of the Langmuir, Freundlich, and Temkin equilibrium isotherm models, as well as the Pseudo-first-order (PFO), Pseudo-second-order (PSO), and Bangham kinetic models. High regression coefficients were achieved in the studied kinetic and isotherm models (0.86 ≤ R2 ≤ 0.99), and the experimental data were found to be compatible with the model parameters. Maximum adsorption capacities (qm) of 167.52 mg/g and 290.36 mg/g were obtained for the SA and SA-GNP adsorbents, respectively, at 308 K. The optimum temperature for both adsorption systems was found to be 308 K. The efficiency of methylene blue dyestuff removal was improved with graphene nanoplatelet-based adsorbents.
Análise da Produção de Artigos Científicos em Agronegócio Publicados em Periódicos Nacionais de Contabilidade
Authors: Oliveira Elis Regina de , Marques Cálita Oliveira , Mendes Jediel Teixeira , Paranaíba Alexandre de Carvalho
Published: March 2023

O presente estudo objetiva analisar a produção de artigos científicos publicados em periódicos nacionais de contabilidade na área de agronegócio no período de janeiro de 2015 a 06 de março de 2021. Para tanto, foram utilizadas as técnicas de pesquisa bibliométrica com abordagens quantitativa e qualitativa, descritiva e documental. A amostra foi composta por 116 artigos científicos relacionados ao agronegócio, considerando como base 23 periódicos nacionais de contabilidade. Os principais resultados da pesquisa são: 2016 e 2017 foram os anos com maiores números de publicações; o autor/coautor com destaque em artigos científicos publicados foi D.L. Oliveira, o qual está vinculado à Universidade Federal de Rondônia, com 5 artigos; os periódicos com mais artigos publicado foram as Revistas de Custos e @gronegócio on line e a de Administração, Contabilidade e Economia – RACE. As duas categorias analisadas possibilitaram identificar as subáreas de Mercado Financeiro e Arbitragem e Contabilidade Gerencial como as mais estudadas. Já os aspectos metodológicos analisados indicaram que essa modalidade de produção científica se realiza, principalmente, por meio de pesquisa documental e estudo de caso com abordagem quantitativa. Este estudo contribui com o diagnóstico da produção de artigo científico sobre a contabilidade aplicada à área de agronegócio, evidenciando a lacuna de veiculação em periódicos com maior influência (Qualis-A1) na área contábil.
The Principle of Subsidiarity as a Valuable Benchmark in the Regulation of Economic Relations
Authors: Kondratienė Virginija
Published: March 2023

The principle of subsidiarity can be an effective tool for adjusting economic systems
and establishing the social rule-of-law concept in public organisation. In
considering the usability of the principle of subsidiarity, the following aspects
thereof are discussed: the role in the development of the European social model;
employment in determining limits for the powers of the public and private sectors;
the application in the market and planned economy systems; and the social justice
function in the development of a social welfare state.
The principle of subsidiarity as an instrument for individuals’ interests, balancing
and adjusting in the regulation of economic systems, helps to establish the
relative sizes of public policy and the market, as subsidiarity can help ensure
a more equitable distribution of public goods while guaranteeing the maintenance
of the creative potency of operators and minimal satisfaction of vital needs of
individuals unable to contribute to the production of goods. It amounts to a constitutional
measure determining the balance of productive and protective state, thus
ensuring the stability of the state organisation.
In the concept of a social rule-of-law state, subsidiarity draws clear limits to
the state’s powers, institutionally bringing together efforts of all members of the
community to achieve welfare in the state.
Aksjomaty, prawo naturalne, wartości i paradygmaty we współczesnych koncepcjach rozwoju
Authors: Piontek Franciszek
Published: March 2023

Contemporary concepts of development (the process of globalization, sustainable
development) can be diversified according to their relation to axioms, natural law,
values and paradigms. The subcategories obtained constitute the ground for business
ethics. Ethics in business is always needed, however, it can be implemented
at-source (as a component of management) or as an end-of-pipe measure. In Poland,
constitutional regulations guarantee, indirectly at least, business ethics as a component
of management.
Kradzieże samochodów w Polsce jako element ryzyka w ubezpieczeniach auto casco
Authors: Wieteska Stanisław
Published: March 2023

The problem of car theft has been observed for many years. The largest scale of
this phenomenon occurred in the 1990’s. In this paper, the issue is discussed in
social, ethical and economic aspects. We present the scale of the phenomenon of
the theft of passenger vehicles in Poland in the years 2001–2012 in terms of the
number of vehicles, type of stolen vehicles and the accident areas. In addition, we
present the cause of theft and selected ways to protect cars from it. We also briefly
discuss the role and responsibility of the insurance companies.
Metodología para implementar un modelo de responsabilidad social empresarial (RSE) en la industria de la curtiembre en Colombia
Authors: Vásquez Paniagua José Alfredo , Gonzales Isaza Diana Patricia
Published: March 2023

La preocupación por el deterioro del medio ambiente es uno de los elementos implícitos en la responsabilidad socialempresarial. La industria de la curtiembre en Colombia tiene una responsabilidad importante en la calidad ambientaldel país, puesto que es una de las mayores generadoras de contaminación del medio ambiente y, en particular, de losrecursos hídricos. Este artículo presenta una propuesta metodológica para la implementación de un modelo de responsabilidadsocial para el sector de la curtiembre en Colombia. Para ello, considera como base el modelo teórico deresponsabilidad social de Donna Wood, la evaluación de impacto ambiental, la normatividad ambiental colombiana, lavaloración económica del deterioro ambiental y la participación ciudadana.
Examining the perceptions of future teachers on the concept of play
Authors: Yaman Serkan
Published: March 2023

Play is an important concept not only for children but for all ages. This study will aim to examine the perceptions of the students of the Faculty of Education about the play. In this study, a quantitative research method was used to reach the research data. The study was conducted with the students of the faculty of education studying at a foundation university in Istanbul. Voluntarily, 114 students were included in the study group. For the research data, the questions were shared with the students via Google form, and the answers were obtained from the students on the internet. The Play Perception Scale developed by Güneş, Tuğrul, and Demir Öztürk was used as a data collection tool in the research. Considering the research findings, making children love the lessons through play from an early age will ensure that more children can solve problems, express themselves, and have strong social relations in the future.

Keywords: Education; learn and play; play perception; pre-service teacher; teaching
Social Media Advertising for Achieving Long-term Marketing Objectives
Authors: Abashidze Irakli
Published: March 2023

Increasing competition in consumer markets forces businesses to elaborate marketing plans focused on long-term perspectives. This is important in today's fluctuating and unpredictable business environments, where a high level of competitiveness and a positive reputation is the premise of survival for a business. Otherwise, it will be unable to retain its share of consumer markets and make plans focused on long-term periods. In this regard, social media advertising is one of the most powerful strategies to reach various marketing goals: brand awareness and high brand value, positive reputation and word of mouth, growing customer base, high ROAS (return on ad spend) in short-term and CLV (customer lifetime value) in the long run. Therefore, it is necessary to research social media advertising to achieve long-term marketing goals. The paper deals with various issues, including social media advertising opportunities, ways of attracting and retaining customers, raising brand awareness, and elaborating strategies focused on long-term results. The discussion provided in the paper is a result of the literature review and the author's observations. Each part of the paper contains recommendatory remarks for achieving long-term marketing goals by using social media advertising strategies. A brief conclusion summarizes the paper.
Effect of Salt Content on Biogas Production and Microbial Activity: Review Study
Authors: Alhraishawi Ali , Aslan Sukru
Published: March 2023

Over the years, biogas production technology has advanced with the goal of reducing process costs and greenhouse gas emissions, and increasing biogas production. Several design factors and operational aspects must be taken into account in order to produce a stable and efficient biogas. When the substrates contain high salts, anaerobic treatment will be ineffective due to the disadvantages of high energy input and operating cost, membrane contamination, and low efficiency. This indicates that the treatment of high salinity organic waste is a big challenge. High salinity levels had a negative effect on bacterial growth through bacterial osmotic pressure metabolism. For example, high salinity can alter the course of fermentation and the accumulation of volatile fatty acids at high concentrations, as well as cause a decrease in methane yield and maximum rate of methane production, prolonging the late-stage period. A low level of salt concentration encourages the growth of bacteria since sodium is essential for the growth and metabolism of microorganisms in AD systems. When the sodium salt concentration is less than 8 g/L, there is no significant inhibition in the generation of methane. Addition of >8 g/L NaCl, however, significantly reduced methane production (causing 17-80 percent inhibition). This paper focuses on understanding in detail how NaCl affects methane production and microbial activity, report salt concentrations that improve process efficiency and reduce inhibition, as well as review the modified kinetic model and demonstrate the effect of salt on methane production and delay in methanogenesis.
The Black Sea - the Geopolitical Springboard of the Region
Authors: Zakaradze Ekaterina , Muradishvili Khatuna
Published: March 2023

Security and stability are essential for stable development, successful integration into global political and economic systems, and sustainable economic growth in the Black Sea region and Black Sea countries, including Georgia. During the Cold War, the Black Sea was "divided" into the Republic of Turkey (as a member of NATO) on one hand, and the countries of the former Soviet Union on the other. After the end of the Cold War, the strategic balance in the Black Sea region has undoubtedly changed - the role and geopolitical-economic importance of the Black Sea has noticeably increased. The Black Sea coastal states, including Georgia and Ukraine, have been given a new geopolitical role, new opportunities, and new challenges.
Investigation of Crack Appearance and Development at Strengthening Rolling Stock Parts by Inductive-Metallurgical Method
Authors: Samarkina Irina , Sobolev Aleksandr , Bityuckiy Nikita , Pavel'ev Igor' , Stopnickiy Stanislav
Published: March 2023

Purpose: To conduct study to obtain data on the appearance and propagation of cracks in the layer that’s welded by induction-metallurgical method, cracks’ impact on exploitation safety of a part and its service age. Methods: Using metallographic studies, the analysis of samples of automatic coupler device with layer, welded by inductive-metallurgical way, was carried out. Results: According to the study results, it was confirmed that cracks do not propagate from welded layer into main metal of a part. Practical significance: The conducted study of crack presence and propagation estimation made it possible to prove further safe exploitation of a part without its performance loss or its structure or technical characteristics deterioration.
Dynamic Forces of Wheel Impact on Rail at Ballastless Track Structure RHEDA 2000
Authors: Ivanova Kseniya , Kolos Aleksey
Published: March 2023

Purpose: Experimental determination of vertical dynamic forces of wheel impact on a rail at ballastless construction of railway track RHEDA2000 upper structure with subsequent analysis of obtained data; definition of main factors affecting vertical dynamic force value; identification of dependence of change in the value of wheel vertical dynamic force impact on a rail from motion speed and rolling stock type; calculation of coefficients of vertical dynamics at ballastless construction of rail upper structure. Methods: Measurement of wheel vertical dynamic force impact on a rail was carried out by strain-gauge method (Schlumpf method). Numerical values of those, obtained in the course of experiment, were processed by mathematical statistics method, in its turn, probability level was taken equal to 0.994. Results: The values of vertical dynamic forces of wheel impact on a rail for ballastless structure of RHEDA2000 type at rolling stock different types and various ranges of motion speed have been determined. The dependence of change in the value of wheel vertical dynamic force impact on a rail from motion speed and rolling stock type has been graphically built. Comparison of vertical dynamics coefficients of ballastless construction of railway RHEDA2000 upper structure with the construction of a track on a ballast has been carried out. Practical significance: The obtained results can be used in projection, construction, reconstruction and repair of railway track where track ballastless upper composition is provided.
Fire Danger of Electric Vehicles
Authors: Kanonin Yuriy , Lyschik Andrey
Published: March 2023

Purpose: To assess increase dynamics of the number of electric vehicles (electric buses) in the Russian Federation, to consider the factors leading to their ignition and to assess the risk of such an accident. To propose measures to reduce consequence severity of electric vehicle (electric bus) ignition. Methods: Information review on this issue from various sources was made. Results: Increase dynamics of electric vehicle number in Russia was assessed which shows at the moment almost annual doubling of electric vehicle number in the country. It is shown that electric vehicle ignition frequency is much lower than that of vehicles with gas-engine. However, the electric vehicle fire develops according to different scenario than of the vehicles with gas-engine and, as a rule, with more severe consequences. The factors leading to the ignition of electric vehicles (thermal runaway in battery due to thermal, mechanical and electrical impacts) and the main dangers arising from their combustion are determined. Modern methods to prevent electric vehicle fires as well as methods of their extinguishing are considered. Practical significance: Measures are proposed to reduce electric vehicle fire risk and measures to reduce such fire consequences.
Führung auf Distanz
Authors: Batz Thomas
Published: March 2023

Der Anspruch an Führung auf Distanz ist enorm hoch und entsprechend entsteht ein großer Schulungs- und Umstellungsbedarf für Führungskräfte sowie ein großer Bedarf an Optimierungen im Hinblick auf Infrastruktur und Technik. Aber diese Investitionen erscheinen unverzichtbar.
Protokolle der Application Layer im industriellen Internet der Dinge
Authors: Balzert Elena , Dobhan Alexander
Published: March 2023

Die zentrale Idee des Internet of Things (IoT) ist die digitale Vernetzung und der damit einhergehende Informationsfluss zwischen unterschiedlichen Objekten. Der Informationsaustausch wird mit Hilfe von entsprechenden Protokollen realisiert. Ziel der Untersuchung ist eine Analyse des betrieblichen Entscheidungsprozesses zur Protokollauswahl auf der Application Layer sowie die Identifikation und Beschreibung der zu berücksichtigenden Entscheidungsparameter. Um dieses Ziel zu erreichen, wurden Experteninterviews durchgeführt und im Rahmen einer qualitativen Inhaltsanalyse ausgewertet. Zentrales Ergebnis aus dieser Untersuchung ist eine Übersicht über Entscheidungsparameter zur Protokollauswahl in Abhängigkeit vom Anwendungskontext.
Processos de formação de palavras em gramáticas do século XIX e XX
Authors: Evaristo Jefferson
Published: March 2023

Os estudos morfológicos passaram por variações conceituais ao longo de sua história, modificando por vezes de maneira substancial a sua configuração e apresentação; reflexos das épocas e das interpretações dos gramáticos, essa parcela fundamental dos estudos gramaticais e linguísticos merece destaque. Em outro contexto, a adoção de uma Nomenclatura Gramatical Brasileira passaria a, em certo sentido, padronizar as acepções variantes que os gramáticos e as épocas possuíam – ao menos em tese, é claro. Neste texto, optamos por analisar e investigar o sentido de morfologia em três gramáticas dos séculos XIX e XX – a Gramática Secundária da Língua Portuguêsa, de Manuel Said Ali; os Serões Grammaticaes, de Ernesto Carneiro Ribeiro; e a Grammatica Expositiva, de Eduardo Carlos Pereira. As obras são significativas no contexto brasileiro, como se verá no texto, motivo pelo qual foram escolhidas. Nossos resultados apontam para uma compreensão e definição da morfologia substancialmente diferentes, mesmo em contextos pós-NGB.
O nordestino segundo um presidente da República
Authors: Massmann Débora , Machado Isadora , Lopes Maraísa
Published: March 2023

Analizamos las acepciones de nordestino puestas en operación por el actual presidente de la República, Jair Messias Bolsonaro. Para eso, nos adherimos a la perspectiva teórica del Análisis del Discurso, propuesta por Michel Pêcheux y Eni P. Orlandi, que se presenta como un dispositivo teórico-analítico de interpretación que permite pensar las relaciones entre lengua, sociedad e historia y los procesos discursivos que de ellas se derivan. Nos apoyamos en las nociones de condiciones de producción, memoria discursiva y paráfrasis para analizar los procesos de significación que se dan en las distintas formas de lenguajes (imágenes, enunciados, etc.). A partir de nuestros gestos de análisis, entendemos una regularidad discursiva que significa a las personas del Nordeste como personas a las que 'no les gusta trabajar'.
Os homens veem um boi
Authors: Lima Nerian Teixeira de Macedo de
Published: March 2023

O presente artigo tem por objetivo discutir a representação de bovinos a partir das seguintes questões: a agência dos animais, seu papel na construção de um projeto colonial e estratégias decoloniais por meio da representação da espécie. Para tanto, a discussão se apoia nas proposições de Walker (2013), Despret (2014), Latour (2014), Ferdinand (2019), entre outros e examina brevemente o seguinte conjunto de obras:  Carro de bois, 1638 (Frans Post), Independência ou morte, 1888 (Pedro Américo), uma pintura votiva da Igreja do Bom Jesus de Matosinho, 1862, em Minas Gerais, A gare, 1925 (Tarsila do Amaral), Malditas e desejadas, 2012 (Jaider Esbell) e Uma vaca para um Índio, 2013 (Bartô).
Cuidar em cuias, um ofício feminino
Authors: Carvalho Luciana Gonçalves de
Published: March 2023

Colher. Cortar. Raspar. Alisar. Tingir. Esperar. Bordar. Para ver e usar. Assim são as cuias, úteis e belas (PAZ, 1991), feitas para “infinitas, materiais e simbólicas coisas”, como frisou Mário de Andrade (1939, p. 2).
Compreensão de alunos universitários sobre Segurança Alimentar e Nutricional e Direito Humano à Alimentação Adequada
Authors: Teixeira Marcela dos Anjos , Damião Jorginete de Jesus , Lobato Evelyne , Castro Luciana Maria Cerqueira
Published: March 2023

A garantia do Direito Humano à Alimentação Adequada demanda reflexão sobre a contribuição da universidade para a produção de conhecimento e formação de atores. O trabalho objetivou analisar as concepções dos graduandos dos cursos de Direito, Nutrição e Serviço Social sobre Segurança Alimentar e Nutricional e Direito Humano à Alimentação Adequada. Para isso foi realizada uma pesquisa descritiva desenvolvida com alunos de uma universidade pública do Estado do Rio de Janeiro, que ingressaram na universidade no segundo semestre de 2013 e estavam cursando, no mínimo, o oitavo período da graduação no primeiro semestre de 2017, quando se iniciou a coleta dos dados. Utilizou-se um questionário com questões abertas e fechadas sobre a presença das temáticas nos currículos, bem como avaliou-se a compreensão dos alunos sobre tais temas. Participaram 51 alunos do curso de Direito, 19 de Nutrição e 13 de Serviço Social. Os alunos do curso de Nutrição apresentaram maior conhecimento prévio e compreensão ampliada dos conceitos, que se fizeram mais presentes nas disciplinas. Apesar dos graduandos reconhecerem aspectos importantes relacionados à insegurança alimentar e nutricional, percebe-se a necessidade de ampliar essa discussão na universidade de modo que um maior número de pessoas tenha formação para a defesa do Direito Humano à Alimentação Adequada e para contribuir para a elaboração e implementação de políticas públicas de Segurança Alimentar e Nutricional, que garantam o acesso ao alimento e à renda.
Відтворення шрифта Брайля струминним УФ-друком
Authors: Чепурна Катерина Олександрівна , Хмілярчук Ольга Іларіонівна , Гущик Софія Вікторівна
Published: March 2023

У роботі проаналізовано існуючі технології та стандарти, що використовуються при виготовленні рельєфно-крапкових зображень для незрячих. Проведено оцінювання рельєфно-крапкових елементів шрифту Брайля, отриманих струминним УФ-друком. Встановлено, що для забезпечення оптимальної тактильності та чіткого розрізнення крапок Брайля достатньо наносити три шари чорнил. Визначено геометричні параметри шрифту Брайля, які забезпечують читабельність надрукованих елементів та чітке сприйняття на дотик. Експериментально підтверджено, що чіткість тактильного сприйняття крапок Брайля залежить від характеру поверхні задруковуваного матеріалу, тому для друку варто обирати матеріали, які характеризуються високою гладкістю поверхні та низькою шорсткістю. Визначено стійкість нанесених фарбових шарів до тертя, шляхом моделювання процесу читання рельєфно-крапкових елементів шрифту Брайля людиною. Виявлено, що рельєфно-крапкові елементи, утворені струминним УФ-друком є стійкими до стирання.
Технологія захисту та контролю друкованої продукції за допомогою прикладних програм цифрової інтроскопії
Authors: Фельде Христина Вікторівна , Солтис Ірина Василівна , Гавриляк Михайло Степанович , Мотрич Артем Володимирович , Ушенко Юрій Олександрович , Дворжак Валентина Володимирівна
Published: March 2023

У статті наведено основи методу кореляційної просторово-частотної фільтрації карток фазових розподілів поліетиленових плівок. Використовуючи метод статистичного аналізу структури просторово-частотних фільтрованих поляризаційних карт полімерних плівок, обґрунтовано та апробовано комплекс методів та критеріїв діагностики зміни двопроменеломлення пакувальних матеріалів. Порівняльний аналіз набору статистичних моментів, що характеризують карти азимутів поляризації, а також зображень великомасштабної (лінійного двопроменеломлення) сітки кристалів, також виявив певні відмінності між ними. Гістограми розподілу поляризаційних зображень полімерних плівок поліетилену з групи 1 мають більш асиметричну побудову з різким ексцесом порівняно з аналогічним розподілом зазначеного поляризаційного параметра зображення полімерних плівок з групи 2. Основні особливості покриття проявилися в більш упорядкованій структурі нижньоподібних кристалів плівок для групи 2. Така геометрична конструкція полікристалічної компоненти проявляється у формуванні пріоритетного, найбільш вірогідного серед усіх можливих значень азимуту поляризації, сукупність яких утворює головний екстремум. Аналітично обґрунтовано метод поляризаційного відображення оптико-неоднорідних полікристалічних ліній полімерних плівок на поліетилен із просторово-частотною фільтрацією координатних розподілів азимуту поляризації лазерної вібрації на площині Фур’є. Наведено порівняльний аналіз ефективності методів прямого поляризаційного картографування та просторово-частотної селекції при диференціації розподілів азимуту та еліптичності поляризації лазерного випромінювання, яке перетворено сітками полімерних поліетиленових плівок.
Indicators of Bioelectrical Activity of the Rat Heart After Prenatal Hypoxia and Pharmacological Correction
Authors: Popazova Olena , Belenichev Igor , Abramov Andrii , Bukhtiyarova Nina , Chereshniuk Ihor , Skoryna Dmytro
Published: March 2023

Background. Posthypoxic cardiopathy is one of the risk factors for the development of cardiovascular pathology (rhythm disturbances, vascular dystonia, etc.) in subsequent age periods and requires the development of treatment approaches. Objective. to evaluate the cardioprotective effect of modulators of the NO system by the effect on the ECG of rats after intrauterine hypoxia. Methods. Modeling of prenatal hypoxia (PH) by daily intraperitoneal administration of sodium nitrite solution to pregnant female white rats weighing 220–240 g, aged 4.5 months, from the 16th to the 21st day of pregnancy at a dose of 50 mg/kg. The offspring were administered daily from the 1st to the 30th day of life – tiazotic acid (morpholinium 3-methyl-1,2,4-triazolyl-5-thioacetic acid), 50 mg/kg, angiolin ([S]-2,6-diaminohexane acid 3-methyl-1,2,4-triazolyl-5-thioacecate), 50 mg/kg, L-arginine, 200 mg/kg, meldonium (2-(2-carboxyethyl)-1,1,1-trimethylhydrazinium), 100 mg/kg. Аnd then after 2 months of life, an ECG was recorded using the ECG TUNNEL system (without anesthesia). Results. Postponed PG leads to a decrease in heart rate and significant dominance of parasympathetic innervation in regulation of electrical activity of the heart, which can be caused by sinus blockade and may be a reflection of parasympathetic regulation of the heart instead of sympathetic control of electrical activity in the norm. The effectiveness of drugs can be presented in descending order: angiolin > tiazotic acid > meldonium. Angiolin proved to be more effective than tiazotic acidin normalizing the electrical activity of the heart and restoring the neurogenic regulation of the automatism of the function of the sinus node. Сonclusions. The prospects of further study of modulators of the NO system with different mechanisms of action as means of cardioprotection of posthypoxic disorders of the cardiovascular system in newborns are experimentally substantiated.
Screening of Strains of the Medicinal Mushroom Fomitopsis officinalis (vill.) Bondartsev & Singer Promising for Biotechnological Use
Authors: Mykchaylova Oksana , Poyedinok Natalia , Shchetinin Valeria
Published: March 2023

Background. Macromycete cultivation methods development will contribute to the production of biotechnological products based on fungus. Determination of the main factors affecting medicinal macromycetes’ life processes allows to control biosynthetic activity of a fungal organism and obtain biotechnological products based on it.
Objective. Screening of Fomitopsis officinalis strains promising for biotechnological use, and determining of physico-chemical factors that affect the cultures life processes.
Methods. The objects of the study were three pure cultures of F. officinalis (IBK-2497, IBK-2498, IBK-5004). The influence of the acidity of the environment on the growth of mycelium, the needs of the cultures in the sources of carbon and nitrogen nutrition were determined. The following carbon sources were used: monosaccharides (glucose, xylose), disaccharides (sucrose, lactose) and trisaccharides (raffinose), polysaccharides (starch); nitrogen sources: KNO3, (NH4)2HPO4, asparagine, peptone. Dynamics of the culture growth were determined under the conditions of deep cultivation, on a liquid nutrient medium of glucose-peptone-yeast extract (GPA), g/l: glucose – 30.0; peptone – 3.5; yeast extract – 2.0; KH2PO4 – 1.0; K2HPO4 – 1.0; MgSO4×7H2O – 0.25.
Results. The pH range between 5.5 and 6.0 was the most favorable for active growth of all studied strains of F. officinalis. The best carbon sources for growth were glucose and starch; peptone and asparagine were the best source of nitrogen. Nutrient media with xylose, lactose and nitrate nitrogen were least suitable for growth. Analysis of the strains growth dynamics on the GPA medium showed that the largest mass of mycelium (up to 11.54 ± 0.2 g/l) was produced by culture F. officinalis IBK-5004 on the 10-th day of cultivation. Cultures F. officinalis IBK-2497, IBK-2498 grew slower, and the mycelial mass was 10.33 ± 0.2 and 9.68 ± 0.3 g/l on the 14-th day of cultivation.
Conclusions. Based on the obtained data, the F. officinalis IBK-5004 strain was selected. It can be considered a promising mycelial mass producer based on the set of characteristics.
Does the Foreign Direct Investment Enhance Bangladeshi Economy? An Empirical Study
Authors: Karim Tania , Rahman Md. Bazlur , Jannat Sakia
Published: March 2023

Like most developing countries, Bangladesh considers foreign direct investment (FDI) as a critical element of economic development. Numerous studies showed that the FDI significantly impacts economic growth due to the technological transfer and innovative capability that enters the recipient country. On the other hand, some other studies did not find any significant impact of FDI on economic growth. The purpose of this study is to determine whether the FDI or other factors, including human capital, infrastructure, and trade openness, impact the economic growth in Bangladesh. Using an ordinary least square (OLS) regression model, 35-year time series data of the variables were analyzed to investigate the variables that impact economic growth in Bangladesh. The study results depict that FDI has no significant impact on the economy of Bangladesh. In contrast, human capital, infrastructure, and trade openness significantly influence the Bangladesh economy. The study findings are expected to benefit the researchers, government agencies, and the decision-makers of multinational companies.
Forjados de placa alveolar con continuidad activa mediante el uso de aleaciones con memoria de forma en base hierro = Hollow-core slab slabs with active continuity using iron-based shape memory alloys
Authors: Del-Río-Bonnín Sandra , Montoya-Coronado Luis A. , Ribas-González Carlos R. , Ruiz-Pinilla Joaquín G. , Cladera Bohigas Antoni
Published: March 2023

Durante los últimos años se ha extendido exponencialmente el uso de aleaciones con memoria de forma en base hierro en el sector de la construcción, especialmente en rehabilitación en países de centro-Europa. Este innovador material se puede usar como pretensado en hormigón armado gracias a su efecto de memoria de forma, pudiendo genera r tensiones de compresión en los elementos de hormigón sin necesidad de utilizar gatos hidráulicos, vainas, dispositivos de anclaje u otros accesorios. Estas aleaciones se encuentran actualmente disponibles en el mercado europeo en formato de barra corrugada o fleje. En este artículo se evalúan las bondades del uso de barras corrugadas de aleación con memoria de forma en base hierro como continuidad activa en forjados prefabricados de placa alveolar, más concreta mente, su proceso constructivo y efectividad, en base a los resulta dos más relevantes de la campaña experimental. Finalmente, se presentan las mejoras en el Estado Límite de Servicio implementando la continuidad activa en comparación a una continuidad sin pretensado, es decir, con la aleación con memoria de forma en base hierro sin activar. Para concluir. queda demostrado que usando esta tecnología se retrasa el proceso de fisuración y se mejora la rigidez de los elementos.AbstractIn recent years, the use of iron-based shape memory alloys has grown exponentially in the construction sector, especially in rehabilitation in Central European countries. This innovative material can be used as prestressing in reinforced concrete due to its shape memory effect and can generate compressive stresses in concrete elements without the use of hydraulic jacks, sheaths, anchorage devices or other accessories. These alloys are currently available on the European market in the form of rebar or strip. This article evaluates the benefits of using iron-based shape memory alloy rebars as active continuity in precast hollow core slabs, more specifically, their construction process and effectiveness, based on the most relevant results of the experimental campaign. Finally, the improvements in the Serviceability Limit State are presented by implementing the active continuity compared to a continuity without prestressing, i.e., with the shape memory alloy on an inactivated iron basis. To conclude, it is demonstrated that using this technology delays the cracking process and improves the stiffness of the elements.
Phenotypic Characterization According to The Feather Color of Indigenous Muscovy Ducks Bred in The Back Yard in Brazzaville, The Congo
Authors: Bati J.B. , Biza-Koukaba C.K. , Banga-Mboko H , Mfoukou-Ntsakala A. , Bakoutana D. , Adzona P.P. , Hornick J.L. , Leroy P.L.
Published: March 2023

Abstract.  In Congo, waterfowl genetic resources are constituted by native population of Muscovy ducks that play an important role in food security. The present study aimed to identify and to characterize strains bred in the back yard in the households in Brazzaville. A sample of 154 households drawn over seven districts of Brazzaville was enrolled in the survey. Adults ducks found in the households were identified, pictured by a key of determination and then compared by using the multi resolution analysis image method. The survey recorded 13 strains in which four were considered as newly since they have never been reported elsewhere. These strains received temporally the name of the districts where they have been identified for the first time Makelékélé 1 (0.34%, n=6), Makélékélé 2 (0.11%, n =2), Poto poto 1  (0.28%, n=5) and in Poto poto 2 (0.11%, n=2). Finally, the survey reported nine classical  strains such as  black plumage, duclair, white, tortora, sepia, chocolate, lavender, grey and canizie. The apparent wide variation in plumage colors is an indication that the duck populations have not been ‘purified’ through selective breeding. In the context of the valorization of poultry biodiversity, this work represents a step toward a better knowledge of the production abilities of local ducks breeds in Congo. Key words: Muscovy ducks, color feather, strains, Congo. Abstrak.  Sumber daya genetik unggas air di Kongo mencakup populasi itik lokal yang memegang peranan penting dalam ketahanan pangan. Penelitian ini bertujuan mengidentifikasi dan menggolongkan jenis itik yang dipelihara di pekarangan rumah di Brazzaville. Sampel penelitian menggunakan 154 responden rumah tangga yang tersebar di 7 wilayah Brazzaville. Itik dewasa diidentifikasi dari pekarangan, dan dibandingkan dengan metode Analisis Multi Resolusi. Survey mencatat 13 jenis peranakan, 4 diantaranya dianggap baru karena belum pernah dilaporkan di studi manapun. Jenis ini sementara dinamai sesuai distrik tempatnya pertama ditemukan, yaitu Makelékélé 1 (0,34%, n=6), Makélékélé 2 (0,11%, n =2), Poto poto 1  (0,28%, n=5) dan di Poto poto 2 (0,11%, n=2). Berdasarkan survei didapatkan sembilan jenis klasik yaitu bulu hitam, duclair, putih, tortora, sepia, coklat, lavender, abu-abu dan canizie. Banyaknya ragam warna bulu adalah indikasi bahwa populasi itik belum “dimurnikan” melalui seleksi. Dalam konteks penetapan nilai keanekaragaman hayati unggas, penelitian ini mewakili sebuah langkah menuju pengetahuan yang mendalam akan kemampuan produksi itik yang berkembang di Kongo. Kata kunci: itik Muscovy, warna bulu, strain, Kongo
The Correlation of Body Morphological Size Toward the Body Weight of PO Steers and Heifers
Authors: Efendy Jauhari , Prihandini P W , Sulistya T A
Published: March 2023

Abstract. The study was conducted to determine the correlation between the body morphology size  of  PO steers and heifers which kept in the group housing of Litbangtan Models. The materials of this study used 24 PO steers and heifers (each cow was 15 to 18 months old). The  data were analyzed using descriptive statistics and correlation analysis. Due to the significant value, it stated that the body length and chest circumference influenced positively to the gain of the weight body of PO steers and heifers . The value of determination analysis (R2) both PO steers  and heifers was 92.70% and 86.80%; It indicated that the gain of the body length size and chest circumference would  increase the body weight. The result of calculation shown that the average of body weight of PO steers and heifers after having used two body morphological measurement (body length and chest circumference) was relativeely close to the real measurement. This phenomenon indicated that the body length and chest circumference had a close relationship with the body weight either in PO steers and heifers. Key words: PO steers and heifers, body morphological size, body weight Abstrak.  Penelitian ini dilaksanakan untuk menentukan korelasi antara ukuran morfologi tubuh PO steers dan heifer yang dipelihara di kandang kelompok Litbangtan Model. Materi yang digunakan dalam penelitian ini adalah 24 PO steer dan heifer (masing-masing berumur 15 sampai 18 bulan). Data dianalisis menggunakan deskriptif statistik dan analisis korelasi. Berdasarkan nilai signifikan, dinyatakan bahwa panjang badan dan lingkar dada berpengaruh positif terhadap peningkatan bobot badan PO steer dan heifer. Nilai koefisien determinsasi (R2) PO steer dan heifer adalah 92,70% dan 86,80%; mengindikasikan bahwa peningkatan ukuran panjang badan dan lingkar dada akan meningkatkan bobobt tubuh. Hasil perhitungan menunjukkan bahwa rataan bobot tubuh PO steer dan heifer setelah menggunakan dua ukuran morfologi tubuh (panjang badan dan lingkar dada) serupa dengan ukuran nyata. Fenomena ini menunjukkan bahwa panjang badan dan lingkar dada berkaitan erat dengan bobot tubuh pada PO steer maupun heifer. Kata kunci: PO steer dan heifer, ukuran morfologi tubuh, bobot tubuh
Productivity of Forages in Grassland Merapi Post-Eruption Area, Sleman, Yogyakarta, Indonesia
Authors: Umami Nafiatul , Suhartanto Bambang , Suwignyo Bambang , Suseno Nilo , Fenila Sarah Adrian , Fajarwati Ruslina
Published: March 2023

This research aimed to investigate the productivity and quality of forages (including dry matter, organic matter, crude fiber, crude protein, and extract ether) in the area of Kali Kuning and Krasak River. This area was affected by Mount Merapi Eruption on 2010. The data were taken from the area around the river due to the area was found to be firstly revegetated after the eruption. The Forage classified as grass, legume and forbs. The method applied in the research was Line Intercept method which was done by seeing the botanical composition there and was performed at several observation points. The forage was taken as the sample and then calculated its production and proximately analyzed to determine its chemical composition. The results showed that around the river, the widest cover area in 2013 and 2014 was Brachiariabrizantha grasses. The largest dry matter production in 2013 was Pennisetumpurpuphoides as much as 165.57 g m–2, while in 2014 the largest production of DM was Brachiariabrizantha as much as 190.37 g m–2. Frobs with another type of weed also spread in this area. The Quality of forages around Krasak River increased in 2014 due to the addition of organic matter contained in the soil and the minerals weathering from year to year.
The effects of Papain Crude Extract Addition in Diets on Broilers Production Performances
Authors: Rumokoy Laurentius , Pudjihastuti Endang , Untu Ivonne Maria , Toar Wisje Lusia
Published: March 2023

This study was conducted to evaluate the effects of papain crude extract addition in mash and pellet feed forms on production performance of broiler chickens in order to obtain the best level of extract papain in mash or pellet form. This natural protease enzyme was extracted from unripe papaya. A complete random design was applied in this study and it was arranged with factorial 4 * 2 and three replications. The treatments were 4 levels of papain (0, 0.03, 0.05, and 0.07 %) and two physical forms of feed (mash and pellet). Broilers production parameters measured were: feed intake, body weight, feed conversion ratio (FCR) and carcass percentage. The results of analysis of variance showed that the interaction was highly significant (P <0.01) for feed intake, body weight, carcass percentage respectively while feed conversion showed significant interaction (P <0.05). The significant differences in the feed consumption described the role of papain enzyme through treatment of CEP and the physical form of feed. The results indicate that the all treatment of papain crude extract level  both in mash and pellet feed form were able to improve feed intake, body weight, FCR and carcass percentage of broiler chickens, whereas the best performance was obtained in the treatment of 0.05% papain crude extract in mash form of diets.
The Effects of Colostrum Immunoglobulin on Strongyloides Infection in Mice
Authors: Rumokoy Laurentius , Posangi Jimmy , Turangan Santi , Irianti Ning , Toar Wisie Lusia , Aban Julio Lopez
Published: March 2023

This experiment was conducted to determine the effects of bovine colostrum IgG on mice infected with Larvae of Strongyloides venezuelensis (L3Sv). This experiment was a 2X2 factorial arrangement including two level of colostrum immunoglobulin-G and two level of endostatine. The parameters were fecal eggs and number of female adult in the gut. The data were statistically analyzed for the mean and standard deviation values, and the differences in treatment groups were subject to ANOVA, if the global differences were detected, a post-ANOVA with LSD test ensued. The development of female adult in the gut, for each group, was performed using Spearman’s rho test. Results showed that colostrum immunoglobulin-G reduce very significantly (P<0.001) the number of eggs per gram feces than in the groups of infected animals treated with endostatine as well as in the mice injected with 3000 L3Vs only. While the reduction of female larvae was significant obtained (P<0.05) in colostrum treatment (L3Sv + colostrum IgG) in comparison with endostatine. It was concluded that the supplementation of immunogobuline-G through the animal digestive system had positively control the Strongyloides venezuelensis parasite infection. This result provides an insight to utilize IgG colostrum in animal husbandry to overcome the threat of parasitic worms infection.
Cattle Farmers' Participation in Rural Development Program in Bantul Yogyakarta
Authors: Guntoro Budi , Prasetyo Anang Febri , Sulastri Endang
Published: March 2023

The purpose of this study to determine the level of participation, identify the factors that influence the participation of farmers and to analysis the effect of participation in the Scholars develop village or Sarjana Membangun Desa (SMD) program. The research was conducted on a group of beef cattle in the SMD program Bantul Yogyakarta Province. Primary data were collected by survey method using questionnaire interviews on 8 SMD groups consisting of 42 members. Analysis of the level of participation of farmers using discriptive analysis, while to analysis factors that affect the participation of farmers and the influence of participation to the success of the program was used multiple linear regression analysis with SPSS tools for windows 16. The result analysis shows that farmers level participation in planning, 71.43% farmers had low participation; 59.52% farmers in the implementation stage had participation that was middle level. On stage of evaluation 54.76% farmers had low participation and in stage sharing benefits 50% farmers had low participation. Success of the program SMD viewed from population cattle declined from 184 head to 107 head, while the existing capital in the group also decreased from IDR 2.904.000.000 to IDR 1.182.000.000 seen from number of members group declined from 185 farmers being 114 farmers. Regression analysis showed that age, occupation, level of formal education, non-formal education, long became members of the group, farming experience, family income, number of dependents, land holdings, cosmopolitan, group motivation, the role of SMD, and the role of agency participation of farmers had not been able to explain the participation of farmers and the value of R2 value of 0.132 (13.2%). Partially no factor capable of affecting farmers participation. Further results of the regression analysis with the participation of relationship success SMD program showed no effect with R2 value of 0.01.
Synthesis of Ionophore from p-t-Butyl-(carboxymethoxy)calix[4]arene Substituted Amide
Authors: Dali Nasriadi , Dali Seniwati , Chairunnas Armadi , Amalia Hilda Ayu Melvi , Puspitasari Sri Ayu Andini
Published: March 2023

The ionophore has been successfully synthesized from p-t-butyl(carboxymethoxy)calix[4]arene subtituted amide. The ionophore was obtained in two steps of the synthesis reaction. The first step is the chlorination reaction of p-t-butyl(carboxymethoxy)calix[4]arene with thionyl chloride in dry benzene solvent. The product of the chlorination reaction is p-t-butyl(chloroacetylmethoxy)calix[4]arene in the form of the light brown viscous liquid with the rendemen of 78.25% and TLC (SiO2, CH3OH : CH2Cl2 = 1 : 1 v/v, Rf = 0.65). The second step is the amidation reaction of p-t-butyl(chloroacetylmethoxy) calix[4]arene with dimethylamine in dry tetrahydrofuran solvent. The product of the amidation reaction is p-t-butyl(dimethylcarbamoylmethoxy)-calix[4]arene or the DIMECAC4ND3 ionophore in the form of white solid with the rendemen of 60.75%, a melting point of 277-279 °C, and TLC (SiO2, CH3OH : CH2Cl2 = 1 : 1 v/v, Rf = 0.82).