bluuebunny/crossref_metadata_2025_split huggingface dataset:
ELECTRODEPOSITION OF SILVER NANOPARTICLES FOR THE DEVELOPMENT OF ELECTROCHEMICAL SENSORS: A SHORT REVIEW
Authors: Николайчук Павел Анатольевич 
Published: December 2022

В настоящем обзоре описываются выполненные за последние два десятка лет исследования, посвящённые электроосаждению наночастиц серебра на поверхности углеродных электродов и их использованию в аналитической химии. Обычно используются графитовые или стеклоуглеродистые электроды (в том числе, полученные методом послойной печати), а электроосаждение выполняется из растворов нитратов калия и серебра в течение нескольких минут. Наночастицы серебра или модифицированные нанокомпозиты, включающие наночастицы серебра, затем закрепляются на поверхности электродов, и полученные электрохимические сенсоры способны определять различные соединения с использованием различных вольтамперометрических методов с прекрасной избирательностью и очень хорошими линейностью и сходимостью. Описанные методы анализа позволяют определять в микрограммовых количествах пероксид водорода, глюкозу, холестерин, метилпаратион, ионы Pb, хлорамфеникол и метронидазол, доксорубицин, энтакапон, тирозин и триптофан, ламотриджин, хром (VI), сурьму (III), тринитротолуол, олигонуклеотиды и бактерии синегнойной палочки.
In the present review the studies performed in the last two decades devoted to the electrodeposition of silver nanoparticles on the surface of carbon electrodes and their implementation in analytical chemistry are described. Usually graphite or glassy carbon electrodes (including screen-printed electrodes) are used, and the electrodeposition is performed from the solutions of potassium nitrate and silver nitrate during a few minutes. Silver nanoparticles or modified nanocomposites including silver nanoparticles are then immobilized on the surface of the electrodes, and obtained electrochemical sensors are capable to determine various compounds using different voltammetric methods with excellent selectivity and very good linearity range and precision. The described methods of analysis allow the determination of microgram quantities of hydrogen peroxide, glucose, cholesterol, methyl parathion, Pb ions, chloramphenicol and metronidazole, doxorubicin, entacapone, tyrosine and tryptophan, lamotrigine, chromium (VI), antimony (III), trinitrotoluene, oligonucleotides and the bacterium Pseudomonas aeruginosa.
THE EFFECT OF THE MIXING RATE OF THE REACTION MIXTURE ON THE DISPERSED CHARACTERISTICS OF THE NANOEMULSION OF FAT-SOLUBLE VITAMIN E (ALPHA-TOCOPHEROL ACETATE)
Authors: Блинов Андрей Владимирович , Сляднева Кристина Сергеевна , Гвозденко Алексей Алексеевич , Голик Алексей Борисович , Тараванов Максим Александрович , Назаретова Екатерина Дмитриевна 
Published: December 2022

В статье представлены результаты исследования влияния скорости перемешивания на дисперсные характеристики наноэмульсий жирорастворимого витамина E (альфа-токоферол ацетат). Скорость перемешивания варьировали в диапазоне 3000-22500 об/мин. В качестве выходного параметра рассматривали средний гидродинамический радиус мицелл жирорастворимого витамина E, который определяли методом динамического рассеяния света. Установлено, что в результате синтеза формируются мицеллы эмульсии жирорастворимого витамина E, имеющие мономодальное распределение по размерам. Наименьший средний гидродинамический радиус частиц составил 22 нм. Установлено, что увеличение скорости перемешивания с 3000 до 22500 об/мин вызывает уменьшение среднего гидродинамического радиуса мицелл. Наибольшие изменения наблюдаются при τ = 30 с, уменьшение среднего гидродинамического радиуса мицелл R происходит в 3,3 раза (с 210 до 63 нм). Важно отметить, что увеличение других параметров синтеза также приводит к уменьшению значения среднего гидродинамического радиуса мицелл наноэмульсий витамина E. При v = 22500 об/мин увеличение времени перемешивания с τ = 30 с до τ = 270 с приводит к уменьшению R на 19 нм (с 63 до 44 нм).
The article presents the results of a study of the effect of the mixing rate on the dispersed characteristics of nanoemulsions of the fat-soluble vitamin E (alpha-tocopherol acetate). The mixing speed was varied in the range of 3000-22500 rpm. The average hydrodynamic radius of the micelles of fat-soluble vitamin E was considered as an output parameter, which was determined by the method of the dynamic light scattering. It was found that as a result of synthesis, micelles of the fat-soluble vitamin E emulsions are formed, having a monomodal size distribution. The smallest average hydrodynamic radius of the particles was 22 nm. It was found that an increase in the mixing speed from 3000 to 22500 rpm causes a decrease in the average hydrodynamic radius of micelles. The greatest changes are observed at τ = 30 s: a decrease in the average hydrodynamic radius of micelles R occurs by 3,3 times (from 210 to 63 nm). It is important to note that an increase in other synthesis parameters also leads to a decrease in the value of the average hydrodynamic radius of micelles of the vitamin E nanoemulsions. By v = 22500 rpm an increase in the mixing time τ from 30 s to 270 s leads to a decrease in R by 19 nm (from 63 to 44 nm).
OBTAINING OCTACALIUM PHOSPHATE IN AQUEOUS MEDIUM DURING THE INTERACTION OF CALCITE WITH MONOCALCIUM PHOSPHATE MONOHYDRATE
Authors: Крутько Валентина Константиновна , Дорошенко Анна Евгеньевна , Мусская Ольга Николаевна , Кулак Анатолий Иосифович 
Published: December 2022

В водной среде из суспензии CaCO / Ca(HPO) при соотношениях Ca/P 1,33, 1,50, 1,67, pH 5-7 и времени созревания 21-50 сут получены кальцийфосфатные композитные порошки, состоящие из брушита и кальцита. Продолжительное созревание (до 68 сут) композитных кальцийфосфатных порошков приводило к гидролитическому переходу брушита в октакальцийфосфат, количество которого увеличивалось с увеличением длительности стадии созревания. Высушивание кальцийфосфатных порошков при 37°С в течение 24 ч способствовало частичному переходу метастабильной фазы октакальцийфосфата в апатит, представленный аморфным фосфатом кальция. Наличие на ИК-спектрах плеча колебаний O-H при 633 см указывает на присутствие апатита в кальцийфосфатных порошках. Использование электрического тока (20 мА/см, 3-20 мин) для локального повышения значения pH позволило увеличить количество октакальцийфосфата в составе композитного порошка, обладающего характерной морфологией розеток из тонких пластинчатых кристаллитов.
Calcium phosphate composite powders consisting of brushite and calcite were obtained in an aqueous medium from a CaCO / Ca(HPO) suspension at Ca/P ratios of 1,33, 1,50, 1,67, pH 5-7, and maturation time of 21-50 days. Prolonged maturation (up to 68 days) of composite calcium phosphate powders led to a hydrolytic transition of brushite to octacalcium phosphate, the amount of which increased with increasing duration of the maturation stage. Drying calcium phosphate powders at 37°C for 24 h contributed to the partially transition of the metastable phase of octacalcium phosphate to apatite represented by amorphous calcium phosphate. The presence of vibrations of O-H at 633 cm as the shoulder on the IR spectra indicates the presence of apatite in calcium phosphate powders. The use of an electric current (20 mA/cm, 3-20 min) for a local increase of the pH value made it possible to increase the amount of octacalcium phosphate in the composition of the composite powder, which has a characteristic rosette morphology of thin lamellar crystallites.
COMPOSITES BASED ON CALCIUM PHOSPHATE FOAM CERAMIC AND HYDROXYAPATITE GEL
Authors: Крутько Валентина Константиновна , Маслова Любовь Юрьевна , Мусская Ольга Николаевна , Кулак Анатолий Иосифович 
Published: December 2022

Получены биоактивные кальцийфосфатные композиты, состоящие из открытопористой многофазной кальцийфосфатной пенокерамики на основе α / β-трикальцийфосфата, β-пирофосфата кальция, биомиметического апатита и 5% геля гидроксиапатита при соотношении по массе (пенокерамика / гель гидроксиапатита) 1:3 и 1:10. Предварительное модифицирование кальцийфосфатной пенокерамики биомиметическим апатитом в концентрированном растворе SBFx5 позволяет увеличить статическую прочность до 0,05 МПа при незначительном снижении пористости и сохранении открытопористой структуры пенополиуретана. Кальцийфосфатные композиты обладают повышенной резорбируемостью в SBFx5 и в 3-5 раз быстрее резорбируются по сравнению с кальцийфосфатной пенокерамикой. Присутствие значительного количества геля гидроксиапатита дополнительно ускоряет резорбцию кальцийфосфатной пенокерамики и протекающие процессы формирования апатита с участием ионов раствора SBFx5 за счет высокой реакционной способности. Полученные кальцийфосфатные композиты могут быть использованы в регенеративных методах лечения для заполнения костных дефектов в ненагруженных областях.
Bioactive calcium phosphate composites were obtained, consisting of open-pore multiphase calcium phosphate foam ceramic based on α / β-tricalcium phosphate, β-calcium pyrophosphate, biomimetic apatite and 5% hydroxyapatite gel at a mass ratio (ceramic foam / hydroxyapatite gel) of 1:3 and 1:10. Preliminary modification of the calcium phosphate foam ceramic with biomimetic apatite in a concentrated SBFx5 solution allows increasing the static strength to 0,05 MPa with a slight decrease in porosity and maintaining the open-pore structure of polyurethane foam. Calcium phosphate composites have increased resorbability in SBFx5 and are resorbed 3-5 times faster compared to calcium phosphate foam ceramic. The presence of a significant amount of hydroxyapatite gel increases the rate of resorption of calcium phosphate foam ceramic and the ongoing processes of apatite formation with the participation of SBFx5 ions due to its high reactivity. The obtained calcium phosphate composites are used in regenerative treatments to fill bone defects in unloaded areas.
FORMATION OF COBALT HYDROXOSILICATE IN AMORPHOUS SILICA MATRIX
Authors: Медянкина Ирина Сергеевна , Светлакова Ксения Игоревна , Пасечник Лилия Александровна 
Published: December 2022

Предложено получение гидроксосиликата кобальта Co(SiO)(OH) в матрице высокодисперсного аморфного кремнезема. Показано, что образование гидроксосиликата, сочетающего в структуре координированные кремнезем- и кобальт-кислородные полиэдры, а также наличие поверхностных гидроксильных групп способствуют сохранению высокой удельной площади поверхности, характерной для аморфного SiO, и эффективному проявлению фотокаталитических свойств благодаря наличию кобальта (2+), обладающего высокой реакционной способностью. В качестве методов синтеза композитов SiO/Co предложены гидрохимические методы путем пропитки и автоклавной обработки золя кремнезема в растворе формиата кобальта. Прослежено влияние изменения количества вводимого кобальта на состав, структуру и свойства композитного материала на основе SiO. Композиты SiO/Co апробированы в реакции фотоокисления гидрохинона при воздействии ультрафиолетового излучения. Наибольшая степень разложения гидрохинона, составляющая 84% за 18 часов, достигнута для SiO/Co с молярным соотношением компонентов Co: Si = 0,01:1.
The synthesis of cobalt hydroxysilicate Co(SiO)(OH) in a matrix of high dispersity amorphous silica has been proposed. It is shown the formation of a hydroxosilicate, which combines coordinated silica and cobalt-oxygen polyhedrons in the overall structure, as well as the availability of surface hydroxyl groups, contribute to the preservation of a high specific surface area as is in amorphous SiO. The hydroxosilicate also contributes to the effective manifestation of photocatalytic properties due to the presence of cobalt (2+), which has a high reactivity. As methods of synthesis of SiO/Co composites hydrochemical methods are used by impregnation and autoclave treatment with solution of cobalt formate of silica. The influence of the amount of introduced cobalt on the composition, structure, and properties of a composite material containing Co(SiO)(OH) in a SiO matrix has been traced. SiO/Co composites have been tested in the hydroquinone photooxidation reaction when exposed to ultraviolet radiation. The highest degree of hydroquinone decomposition amounting to 84% in 18 hours was achieved for SiO/Co at a molar ratio of components Co:Si = 0.01:1.
Mitigasi Bencana Berbasis Pengetahuan Lokal Masyarakat Majene
Authors: Akbar Muhammad Randhy , Muhayyang Mushlihah , Khaidir Siti Nurhaliza Febryna , Iswar Alwi , Salam Fitrah Awalia 
Published: December 2022

Penelitian ini bertujuan untuk mengetahui peran aktif pemerintah daerah dalam penyusunan kebijakan mitigasi bencana berbasis pengetahuan lokal di Kabupaten Majene. Metode yang digunakan dalam penelitian ini adalah deskriptif kualitatif. Teknik pengumpulan data dilakukan melalui observasi, wawancara dan dokumentasi. Hasil penelitian Pemerintah daaerah dalam mengantisapasi bencana gempa di Kabupaten Majene dapat dilakukan dengan mengupayakan peringatan dini dimulai dari dunia pendidikan. Secara garis besar dunia pendidikan sangat berperang penting dalam upaya kesadaran guna kesiapsiagaan bencana yang akan terjadi di tengah masyarakat. Operasi penanggulangan bencana perlu dipastikan efektif, efisien dan berkelanjutan. kita bisa mengantisipasi bencana untuk meminimalisir korban melalui kebijakan yang berbasis teknologi dan pengetahuan lokal.
Validación del método filtración por membrana para la detección de Vibrio cholerae en aguas marinas
Authors: Calvo Saad Maria Jisset , López Suárez Karen 
Published: December 2022

En el presente trabajo se describe la validación del método de filtración por membrana para la detección de Vibrio cholerae en aguas marinas. Para tal fin, se tuvo en cuenta el método de referencia descrito en el Standard Methods for the Examination of Water and Wastewater. 23th edition. 9260H. Se utilizó como medio de cultivo selectivo el agar Tiosulfato Citrato Bilis Sacarosa (TCBS), el medio diferencial ChromAgar Vibrio y como medio de enriquecimiento el Agua Peptona Alcalina al 1% (APA). Como pruebas confirmatorias (cuerda, oxidasa y API20E). Los parámetros de validación determinados fueron límite de detección, sensibilidad, selectividad/especificidad, tasa de negativos y positivos, precisión, exactitud e incertidumbre, los cuales son recomendados para los métodos de tipo cualitativo. Los resultados demostraron un criterio de aceptación del 95 % y óptimo, este último de acuerdo a los parámetros de rendimiento. Adicionalmente, el método resulta ser sensible, reproducible y específico para el microorganismo de interés y apto para su aplicación en laboratorio en la matriz agua de mar evaluada.
Entrepreneurial passion and entrepreneurial intention: the mediating role of perceived behavioral control
Authors: KRAIEM Ahlem , RAHALI Houda , RAHALI Houda , NEFZI Ayoub , NEFZI Ayoub 
Published: December 2022

Purpose: The objective of this article is to clarify the mechanism through which entrepreneurial passion affects entrepreneurial intention. This article empirically investigate whether perceived behavior control have a mediating effects on the relationship between entrepreneurial passion and entrepreneurial intention. It is based on cognitive perspectives; the present study aimed to identify the impact of entrepreneurial passion on entrepreneurial intention.
Design/methodology/approach: The research method is quantitative. The sample of this study comprised 240 respondents from the public of Tunisian project leaders. Data were gathered using a self-report administered questionnaire, and hypotheses were tested with structural equation modelling.
Findings:. The results demonstrate that the relationship between passion and intention is mediated by perceived behavioral control. We found that the mediating effect of perceived behavioral control is partial.
Implications/recommendations: Our study has some practical implications for the researcher and entrepreneuship education who are directly and indirectly involved in enhancing the growth of entrepreneurship.
Practical implications: This article gives rise to a new reflection on the analysis of entrepreneurial behavior based on a psychological and affective approach.
Paper type: Research paper
Corporate Governance and Macroeconomics on The Financial Stability of Islamic Banks
Authors: Rahmayuni Siti , Paminto Ardi 
Published: December 2022

Purpose: This study discusses the influence of Corporate Governance and macroeconomics on financial stability in the Islamic banking sector.
Design/methodology/approach: This study employed a quantitative and Data analysis uses panel data regression.
Findings: while the independent variable in this study is Corporate Governance and Macroeconomics, with the results showing that Corporate Governance and macroeconomics have no partial effect..
Research limitations/implications: There are only two variables considered in this paper: corporate governance and macroeconomic.
Practical implications: partially corporate governance has no effect and macroeconomics has a negative effect.
Originality/value: TThis study calculates and finds out the truth of corporate governance and macroeconomic variables on financial stability.
Paper type: Research Paper
Keyword: Corporate Governance, Macroeconomics, Financial Stability, Inflation
Assessing the challenges faced by informal street traders operating in Durban, South Africa
Authors: Zogli Luther King Junior , Dladla Nonduduzo , Dlamini Bongani 
Published: December 2022

Purpose: The informal sector consists of all unregistered businesses operating as street vendors and home-based businesses. Although these businesses employ about 6 out of every 10 workers worldwide, they encounter numerous challenges in carrying out their daily operations. Therefore, in this chapter, the challenges faced by informal traders located in the Durban central district of South Africa’s Kwa-Zulu Natal province are investigated.
Design/methodology/approach: This study employs the qualitative research approach utilising structured interviews to obtain data. The Snowball sampling method assisted the researchers to obtain the required data and was analysed using Content Analysis.
Findings: The results shows that, lack of business space for trading and storage, lack of funding to expand business, poor hygiene and the lack of ablution facilities for traders as well as municipal harassment were the major constraints of the informal operators.
Will Employer Branding Through Exploring Dynamics Between Organizational Learning, Organizational Culture and Employee Wellbeing?
Authors: Maharani Anita , Maulana Andi , Kurniawan Dovi , Yozef Yozef 
Published: December 2022

Purpose: This study aimed to see how well-formulated organizational learning, organizational culture, and employee well-being impact better employer branding. The literature used to help build this research model is through concepts related to the four aforementioned variables.
Design/methodology/approach: This study uses a quantitative research approach, distributing surveys for data collection and conducting analysis with a structural model approach
Findings: The results obtained from this study are that employer branding is driven by organizational culture and employee well-being, while organizational learning does not affect it.
Research limitations/implications: This research need more exploration due to the research object
Practical implications: The implication of this research may show insights from employee’s perspectives on employer branding.
Originality/value: This paper was conducted based on research of organizational learning, organizational culture, and employer branding
Paper type: Research paper
Factors influencing sustainable entrepreneurial practices: Looking at individual-level factors through conventional entrepreneurial perspectives.
Authors: Hossain Sharif 
Published: December 2022

Purpose: Entrepreneurs contribute to the economic and non-economic development of a country with their entrepreneurial activities, but they also negatively impact the environment. Using entrepreneurial capabilities, however, entrepreneurs can turn various social and environmental issues into profitable solutions to benefit society and ensure their long-term business success which is called sustainable entrepreneurship.
Design/methodology/approach: This research aims to identify and highlight individual level factors that directly, or indirectly, affect individuals’ behaviour, and can influence them to engage in sustainable entrepreneurial activities.
Findings: This secondary research reviewed and integrated existing literature to highlight individual-level factors that can influence entrepreneurs to engage in sustainable entrepreneurial practices. The insight of this paper could open key considerations for researchers in the sustainable entrepreneurship field to explore individual-level factors and enhance further understanding
Paper type: Research paper
Cultural Impediments to Entrepreneurship Development
Authors: Ng Lee Keng , Bhasin Balbir , Beard Jim 
Published: December 2022

Purpose: The country direly needs to develop its entrepreneurial capability which is the key engine for economic development and poverty eradication. The Sri Lankan culture embraces collectivism and the traditional values of Theravada Buddhism, a belief system which inherently functions against the fostering of entrepreneurial spirit. Removing impediments to entrepreneurship is a key challenge for the country.
Findings: Sri Lanka is presently recovering from the destruction of the economy because of 30 years of civil war. The country is confronted by high government debt representing almost 80% of the GDP. Almost half of the population lived on less than $5 per day in 2013.
Originality/value: Using Sri Lanka as a case in point, this paper assesses the influence culture has on entrepreneurship and explores initiatives and measures that can be used to strengthen inherent cultural values that stimulate entrepreneurial spirit, encourage risk-taking, and in turn promote economic development.
Paper type: Research paper.
Analysis of Attitude, Subjective Norm And Perceived Behavioral Control on The Consumer’s Purchasing Behavior Toward Halal Skincare Product in Indonesian Women
Authors: Dumillah Wahyu Retno 
Published: December 2022

Purpose: This study discusses about attitude, subjective norm and perceived behavioral control on the consumer’s purchasing behavior toward halal skincare product in Indonesian women.
Design/methodology/approach: The data obtained were processed using Structural Equation Modeling (SEM) method with SmartPLS3.
Findings: The results showed that attitude had a positive and significant influence on buying halal skincare products.
Research limitations/implications: Datas were collected through questionnaires that distributed online. The number of respondents who involved were 54 respondents.
Practical implications: This study also shows that intention has a positive and significant influence on purchasing behavior of halal skincare products
Originality/value: This study calculates and finds the truth about attitudes, subjective norms and perceived behavioral control on consumer buying behavior towards halal skin care products in Indonesian women using a questionnaire.
Paper type: Research Paper