bluuebunny/crossref_metadata_2025 huggingface dataset:
Produksi dan Karakterisasi Enzim Selulase Ekstrak Kasar dari Bakteri yang Diisolasi dari Limbah Rumput Laut
Authors: Dini Isna Rahma , Munifah Ifah
Published: May 2023

Seaweed waste is a source of bacteria that can produce cellulase enzyme. PMP 0126w isolate is one collection isolate of BBP4BKP obtained from seaweed Glacilaria sp. waste from Pameungpeuk area, Garut, West Java. The aims of this research were to produce and characterize the cellulase enzyme. PMP 0126w isolate was a Gram-positive rod shape bacteria. The isolate had 0.8 cellulolytic index on Carboxymethyl Cellulose (CMC) agar medium. The highest cellulase activity obtained on the third day of fermentation time with a cellulase activity of 0,074 U/mL and specific activity of 0.092 U/mg. Optimum activity of the cellulase enzyme crude extract was pH 5 and 300C. The activity of the cellulase was increased by addition of 5 mM CaCl2 and 10 mM FeCl3 ions and decreased by the addition of 10 mM ZnCl2 ions. The cellulase with the highest activity of 0.237 U/mL was obtained from Glacilaria sp. seaweed waste treated with NaOH 6%. Keywords: cellulose, characterization, production, seaweed waste
Profil Pertumbuhan Mikroorganisme pada Fermentasi Biji Kakao Aceh
Authors: Muzaifa Murna , Abubakar Yusya , Haris Faitzal
Published: May 2023

Fermentation process is the most crucial step in the formation of the flavor and aroma of the cocoa bean. Cocoa bean fermentation triggers an array of chemical changes within the bean.These chemical changes are vital to the development of the complex and much-loved flavour known as “chocolate”. Fermentation involves a number of specific microorganisms that play a role during fermentation. The aim of this research was to analized microorganism growth profil of Aceh cacao during fermentation. Fermentation was conducted on 6 days with  different aerations (agitation every 24 and 48 hours). The result showed that growth profile of microorganism during fermentation relatively  had similar trend. Yeast dominated on the early fermentation, lactid bacteria reached the higest population on day 3 and acetic acid bacteria on day 4. Better quality of fermented cacao was resulted on every 48 hours of agitation  that reached 70,19% of full fermentation.
Farklı Yıllarda Toplanan Benli Şalba (Salvia pisidica Boiss. & Heldr. ex Bentham) Türünün Sitotoksik Etkisinin Araştırılması
Authors: ÜNAL Orhan , ÖZKAYA Serap , AYDEMİR Esra , TORUN Mehmet
Published: May 2023

Kanser, genomdaki birçok mutasyonun birikimi ile ortaya çıkan sistemik bir hastalıktır. Kanser tedavilerinde kullanılan farklı tedavi yöntemleri nedeniyle zamanla hücrelerde yüksek toksisite ve ilaç direncine neden olması sebebiyle tedavilerdeki başarıyı engellemektedir. Bu nedenle kanser tedavisi için doğal ürünler ve bunların sentetik türevleri büyük bir potansiyel taşımaktadır. Benli Şalba (Salvia pisidica Boiss.&Heldr. Ex Bentham) antibakteriyel ve antioksidatif etki başta olmak üzere birçok biyolojik aktiviteye sahiptir. Bu çalışmada farklı yıllarda toplanan bitkileren elde edilen su ekstraktlarının meme kanser hücrelerinde sergilediği sitotoksik etkiler incelenmiştir. Çalışmada 24, 48 ve 72 saatlik inkübasyonlar MCF-7, MDA-MB-231 ve MCF10-A hücre hatlarında yapılmıştır. 2017, 2018 ve 2019 yıllarında toplanan S.pisidica bitkisinin su ekstraktları 1-1000 ng/mL dozlarda hücrelere uygulanmıştır. WST-8 hücre canlılığı belirleme kiti ile sitotoksisite testi inkübasyon süreleri sonunda yapılmıştır. Çalışmalar sonucunda MCF-7 hücrelerinde 2017 yılına ait ekstraktın 48 saatlik inkübasyonda IC50 değeri 1.95 ng/mL, 2019 yılına ait ekstraktın 48 saatlik inkübasyonda IC40 değeri 3.9 ve 1.95 ng/mL olduğu hesaplanmıştır. Daha agresif olan MDA hücrelerinde 2019 yılına ait S.pisidica su ekstraktının 48 saatlik inkübasyondaki IC50 değeri ise 7.8 ng/mL’dir. Elde edilen sonuçlara bakıldığında fenolik içeriklerin yıllara bağlı olarak farklılık gösterdiği ve 2017 örneğinde düşük 2019 örneğinde ise yüksek değerlerde olduğu bulunmuştur.
Isolation and Characterization of Collagen from the Invasive Sea Urchin (Diadema setosum L., 1778) in North-Eastern Mediterranean Sea, Türkiye
Authors: UĞURLU Erkan , DUYSAK Önder , SAYIN Selin , SAYGILI Eyüp İlker , BENLİER Necla
Published: May 2023

In the present study, collagen was obtained from tissues of the invasive sea urchin (Diadema setosum) rapidly spread in the Mediterranean Sea. As a result, the yield of collagen isolated from sea urchin was determined to be 23.78±1.33% (dry weight). As a result of SDS-Page analysis, it was determined that it contains (α1)2α2, (Molecular Weight (MA) 124, 114 kDa) and ß chains (MA 245 kDa) similar to calfskin collagen. In the amino acid analysis of collagen, it was determined that the imino acid (proline+hydroxyproline) content was 196.1 residues/1000 residues. The functional bands of amide A (3301 cm-1), B (2924 cm-1), I (1643 cm-1), II (1550 cm-1), and III (1242 cm-1) functional bands were visualized in the FTIR spectrum. These results were like other collagen sources. Invasive sea urchin was used as a source of collagen for the first time in the present study. An alternative source of collagen to mammalian collagen, which is used commercially in many industries such as biomedicine, food and cosmetics, was isolated for the first time from D. setosum. It was proposed that marine collagen can be used as an alternative source of collagen and a functional component in areas including food, cosmetics, and pharmaceutical industries.
Grit Competency, Growth Mindset, and Mental Ability among Filipino High School Students
Authors: Lumanog Advincula Jowie
Published: May 2023

Educators and mental health professionals have promoted social and emotional learning (SEL) as the foundation for safe and positive education. SEL factors such as grit competency and growth mindset were the critical factors in this research, along with the student’s mental ability level. Grit competency pertains to one’s ability to work hard, overcome setbacks, finish tasks, and set long-term goals. At the same time, a growth mindset refers to believing intelligence and ability can change with persistence and practice and believing interests and behaviors can positively change with effort and learning. This research aimed to determine the grit and growth mindset levels of 137 all-female Filipino senior students from Quezon City and test their relationship with mental ability. A standardized test measured grit competency and growth mindset, while the Otis-Lennon School Ability Test, 7th Edition (OLSAT-7), measured cognitive ability. Results signified a low and negative relationship between grit competency and mental ability, with r = -.152 and p = 0.039 < 0.05. Similarly, there was a low and negative relationship between a growth mindset and cognitive ability with a value of r = -.157 and p = 0.034 < 0.05.
Keywords: Grit Competency; Growth Mindset; Mental Ability; High School Students.
Exploring the Antecedents of Employee Green Behaviors: A Conceptual Framework
Authors: Nuswanto Venansius Bangun , Gustomo Aurik , Aprianingsih Atik , Febriansyah Hary
Published: May 2023

The emergence of sustainable design has brought attention to the consideration of human behavior in creating environmentally-friendly operations. This study examines the role of the Theory of Planned Behavior (TPB) and the Value-Identity-Personal Norm (VIP) model in shaping employee green behavior (EGB) and explores how green human resource management (GHRM) practices impact EGB. Based on a review of 40 scholarly articles, the study proposes a conceptual model that integrates individual-level constructs from TPB and VIP, and highlights GHRM as an antecedent of EGB at the organizational level, with psychological capital and organizational identity as mediators. The study suggests a multilevel approach to examining EGB, incorporating person-environment interaction, job performance, and motivation theory. Ultimately, the study aims to provide a research agenda that encourages further investigation of the topic.

Keywords: Employee Green Behavior; Green Human Resource Management; Sustainability; Theory of Planned Behavior; Value-Identity-Personal Norm Model.
Neurociencias Sociales: principios epistemológicos
Authors: Pedraza Vargas Steve Fernando , Vélez Jiménez Dolores
Published: May 2023

Las neurociencias constituyen un conjunto de conocimientos científicos sobre el Sistema Nervioso Central que tienen diferentes enfoques: localizacionista, conexionista, histórico-cultural y social. Estos enfoques obedecen a crisis paradigmáticas asociadas a "anomalías" encontradas en el desarrollo de la investigación neurocientífica a lo largo de la historia reciente. Esto conduce a marcos explicativos distintivos, entre los que destacan líneas filosóficas orientadas por el pensamiento positivista y el pensamiento dialéctico. Este ensayo pretende reflexionar sobre los principios epistemológicos específicos del objeto de estudio de las neurociencias sociales. Durante el ejercicio reflexivo, se revisan las bases epistemológicas construidas desde el pensamiento complejo, el modelo ecológico, el modelo de los determinantes sociales y el modelo multicausal. En conclusión, se invita a reconocer que el neurocientífico contemporáneo se enfrenta a una ciencia que evita las situaciones simples para adentrarse en el estudio de los procesos humanos desde una perspectiva compleja.
Palabras clave: Neurociencias sociales; pensamiento dialéctico; pensamiento complejo.
El apoyo familiar y su influencia en la atención de los adultos mayores
Authors: Cedeño Toro Leonor , Cevallos Sánchez Herman Arnulfo
Published: May 2023

La atención de los adultos mayores es una de las principales prioridades de la gestión de la salud, donde el apoyo familiar es esencial. El objetivo de este trabajo fue diagnosticar la situación actual del apoyo familiar en la atención de los adultos mayores de la comunidad Agua Fría. Se realizó una investigación no experimental, basada en el paradigma sociocrítico, con un enfoque mixto, descriptivo y transversal. La población de estudio incluyó a 83 familias con 122 adultos mayores, de los cuales 98 cumplieron con los criterios de selección para el análisis cuantitativo, utilizando el Cuestionario de Apoyo Social Percibido MOS, que permitió evaluar 4 dimensiones: emocional, instrumental, apoyo social y afectivo. Para el análisis cualitativo, se realizaron entrevistas en profundidad a informantes clave, que incluyeron a 10 familiares, 10 adultos mayores y 3 especialistas (un psicólogo clínico, un sociólogo y un trabajador social). Para el análisis de los resultados, se triangularon los criterios emitidos. Los resultados indicaron que las redes de apoyo mejor percibidas fueron la familia y las instituciones de salud, y que las dimensiones de apoyo de mayor nivel fueron la social e instrumental. Es importante que tanto los profesionales de la salud como las familias reconozcan la importancia del apoyo que deben brindar a las personas adultas mayores.

Palabras clave: Adulto mayor; atención; apoyo familiar; familias.
Status of the BOLD reference library of DNA barcodes of caddisflies (Insecta: Trichoptera) from the Western Balkans
Authors: Ušanović Lejla , Destanović Dalila , Lasić Lejla , Hanjalić Kurtović Jasna , Costa Filipe O. , Kalamujić Stroil Belma
Published: May 2023

Background and purpose: Available data in research literature suggest that the Western Balkan countries hold a rich diversity of caddisflies. Assessment and biomonitoring of such rich diversity could be facilitated through DNA-based high-throughput approaches like DNA metabarcoding that depend on the availability of comprehensive reference libraries.
Materials and methods: We assessed the status of the COI barcode sequence data for a total of 112 caddisflies species in the investigated region by determining the gaps in representative sequences in the Barcode of Life Data System (BOLD) and examining the accuracy of available records using the Barcode, Audit and Grade System (BAGS).
Results: Results revealed a considerable underrepresentation of surveyed geographic region in BOLD records for the target insect group. Moreover, the large majority of the species records were rated “discordant” (72.80% grade E), and only 15.20% were classified as “consolidated concordance or basal concordance” (3.20% grade A and 12.00% B). Approximately 3.20% of the records pertaining to species occurring in multiple BINs (Barcode Index Number) and 8.80% were poorly represented (i.e., less than three specimens, grade D). A fraction of the species graded discordant were deemed concordant after detailed inspection of individual data, decreasing by 14.07%.
Conclusions: The assessment of the current state of BOLD entries indicated that DNA barcoding is still not widely applied in Albania, Bosnia and Herzegovina, Montenegro, North Macedonia, Serbia, and Slovenia, emphasizing that Croatia has the most barcoded caddisflies species. The finding that available BOLD Trichopteran records for investigated countries were mainly graded as “discordant” indicates the need for better quality control of reference libraries.
Inter-Subjectivity
Authors: Buckley Nicolás
Published: May 2023

The Basque pro-independence terrorist group ETA (an acronym for what translates to ‘Freedom for the Basque Country’) announced a definitive ceasefire in 2011. A year later, I began a PhD on how the Basque conflict could be understood from the life stories of ETA activists. After completing my research, I asked myself: What kind of tensions emerged during the interview process with ETA activists who collaborated in my research taking into account my family background and my Spanish identity? Instead of just appearing as a bidirectional relation between the narrator and the interviewer, inter-subjectivity reveals more powerful mechanisms as it helps reveal hidden collective traumas of the Spanish population where I, as the historian, become part of the story.
We Can Only Say What a Basque Is Not
Authors: Allmendinger Blake
Published: May 2023

What does it mean to be Basque, and why has this question become more complicated in the twenty-first century? An examination
of several artists and their work provide possible answers to this question. American avant-garde artist Man Ray produced an
experimental silent film in 1926 entitled Emak Bakia. Why he used this Basque phrase—which roughly translates
as “Leave me alone”— is a mystery that has never been solved. In 2012, Basque filmmaker Oskar Alegria decided to track down the
source of Ray’s inspiration in his documentary, The Search for Emak Bakia, 2012. By a strange twist of circumstance,
searching for Alegria’s film turns out to be as difficult as solving the mystery of Emak Bakia. The film has never been
shown in the United States, though a private copy was made available to the author of this article with the director’s
permission. A Maurice Ravel musical composition and Eduardo Chillida’s sculpture in the Basque Country also help to explore
this question. Together, the nuances of these collective artistic endeavors and their focus on “what is not” can suggest
an alternative way to think about “what is.”
“The Little Nothings Make Life as It Is” (Soviet Everyday Life in the Zinaida Lyikovi’s Diaries 1962—1963)
Authors: Savkina Irina
Published: May 2023

The paper is devoted to the study of the different aspects of Soviet everyday life represented in diary notes (1962—1963) of ordinary student Zinaida Lykova. She was born in 1945, lived in the suburbs of Cherepovetz, and during the mentioned period studied in the School of the Working Youth (Shkola Rabochey Molodezhi). The author approaches diary notes as a source for microhistory because of their capacity to unintentionally capture the moment of everyday life. Moreover, the person who writes the diary becomes a subject of everyday life history themselves. They not only capture the everyday reality, but also create and maintain it through the practices of writing. Descriptions of the Soviet ideology, relations with people, spare time practices, and everyday life are presented in Zinaida’s diaries. In there the strategies of the “weak” which becomes the source of the power could be observed: to hide which is not allowed, to improve yourself, to adapt, to search for hidden sources, to believe in yourself, and to hope for friends, relatives, and communal support but not for the government.
François de Valois' Letters and Itineraries: on the Way to Studying the History of Myth
Authors: Ryabov Sergey
Published: May 2023

The article studies itineraries of François de Valois, younger son of Henry II of Valois and Catherine de Medici, Duke of Alançon, Anjou and Brabant based on his letters, acts and letters, mainly from Russian repositories, in the context of military and political situation of the French Kingdom during the Civil wars of the second half of the 16th century. There is noted an obvious historiographical underestimation of the significance of this figure, which prompts to re-examine his biography and related sources. Based on the study of the duke's autographs, the author raises the question of revising the “black legend” and the myth that had developed around this historical figure. The paper provides a chronological classification of the documents kept in the archival collections of Russia and France.
The French Court of the 16th Century: What Else Do We Not Know About It?
Authors: Shishkin Vladimir
Published: May 2023

The article examines several interrelated problematic questions, the first of which reflects the justification of scientific relevance for modern Russian historical science of studying the Western royal courts of the Middle Ages and early Modern times, in particular, French court. The author presents the royal court as an important part of French history, which influenced the historical development of European and partly Russian civilization. The interest to the history of French court of Russian historians is also associated with a significant number of rare French documents of the 16th century, concentrated in Russian repositories and requiring introduction into scientific circulation. These documents are largely associated with current Russian research on curial history, which have a long tradition and focus on the institutional history of the court. An overview of current trends in curial research in Western historiography is also presented, which focuses on the study of gender characteristics, personal court members, socio-political evolution of the court, compilation of databases on courtiers and employees, movements and residences of monarchs.
Discourses of Time and the Ghost of the Roman Emperor
Authors: Gershtein Anna
Published: May 2023

The article deals with the appearance in 1284 of a man who declared himself as Emperor Frederick II of Staufen, who had actually died more than 30 years earlier. When this man was asked where he had been for so many years, he replied that he had covered his sins in the Holy Land as a pilgrim, and now the time had come again to him to rule his empire. This story revealed that medieval man apprehended contemporary events in “several times” at once: 1) as a period of the reign of one sovereign (which, as this episode shows, could be broken and then resumed); 2) the sacral time, a tangible proximity “the end times”; 3) still alive and actualizable images of the emperor in people’s memory. And these memories to some extent continued to define the actions of the urban community at the time when the impostor appeared.
About “Ivans of Oblivious Origin”: One of the Strategies of Social Mobility in Eighteenth-Century Russia
Authors: Gornostaev Andrey
Published: May 2023

In the Russian legal system, the phenomenon of persons of oblivious origin emerged in the early eighteenth century. During population censuses, enumerators discovered a number of people, unaware of their parents and places of domicile, who subsequently did not belong to any social stratum. Despite its realization that many persons of oblivious origin were in fact runaway peasants and deserters, the government decided to use them to increase its population in different parts of the country instead of returning them to their official localities. At the same time, some runaways independently managed to be added to the census rolls in towns and villages, thereby changing their social status. As a result, the examination of the issue of people of oblivious origin as one of the strategies of deception improves our understanding of adaptation tools and everyday practices, employed by the inhabitants of the Russian Empire.
The Diplomatic Mission of the Crusaders to Egypt in 1167: the Language of “Gestures”
Authors: Svetlana Luchitskaya
Published: May 2023

The article analyzes a well-known episode in the history of diplomatic relations between the Latin Kingdom of Jerusalem and Fatimid Egypt — the conclusion of a treaty on military assistance in 1167. The procedure of concluding the agreement itself vividly revealed the differences in Western and Eastern etiquette of diplomacy and provoked a cultural shock that was overcome with the help of symbolic gestures. A passage translated in the article from the chronicle of William of Tyre allows for a clear understanding of how the language of diplomacy functioned in Latin East in the mid-12th century.
Burgundian Cleric and Denis Fonvizin Teach Grammar: Court Manners in the Mirror of Two Epochs
Authors: Krylova Yulia
Published: May 2023

In the 1780s the well-known Russian writer Denis Fonvizin created his “General Court Grammar”. The idea of this work still seemed original and the sources of borrowing were not known. Meanwhile, its idea is very similar to the French “Doctrinal du temps present” by Pierre Michault (15th century), an anticurial text where court manners are also shown through the teaching of grammar. The article has a dual purpose: firstly, by comparing it, it examines in detail the circumstances of both works, the reasons for their writing, the choice of plot and the contents, and puts forward a hypothesis about the possible borrowing of idea by Denis Fonvizin from the French text. Secondly, the methods of everyday history are used to conclude that both authors are dissatisfied with their place in courtly society and the need to make a career through their literary talent.
Italian Renaissance Courts and Its Research in Western Historiography of the 21st Century
Authors: Dmitrieva Marina
Published: May 2023

The article is devoted to the study of Italian Renaissance Сourts in Western (mainly Italian) historiography of the 21st century. The authors identify the directions and problems of research, comparing the problems of scientific works were written before the appearance of Italian Court History with works that were appeared at different stages of its development: in the initial period, in the first and second decades of the 21st century (the main emphasis is made on the study of the works of the 21st century). The article provides an overview of the main problems of the history of Italian courts in the works devoted to the influential Italian states of the Renaissance: the Duchy of Milan, the Papal State, the Kingdom of Naples and the Republic of Florence, highlights the issues existing in this area in relation to other Italian states (in particular, Siena and Genoa). The authors explore the works devoted to the problems of the relationship between the Italian and European courts of the Renaissance and other topical issues of modern research.
Three Bankruptcies: the Decline of Family Business in the Practices of Women Entrepreneurs in Moscow, 1830s to 1880s
Authors: Ulianova Galina
Published: May 2023

The article focuses on the issue of influence of the general economic situation and intra-family relations on the emergence of entrepreneurial risks that led to bankruptcy, and based on the reconstruction of three cases of the ruin of female entrepreneurs in the 1830s to 1880s from the proceedings of the Moscow Commercial Court. In a discourse in economics, bankruptcy represents one of the serious conflicts arising in the course of the development of Russia’s modern market economy and business culture. The presented cases of bankruptcy demonstrated that the causes were as follows: the lack of a distinctly defined distribution of responsibility and control between the partners in a family business; the insufficiency of the initial capital needed for establishing a factory and for its further development; the sharp decline in consumer demand for its products; and the crisis-imposed suspension of operations in the crediting system acting as an additional risk factor.
The Cassock Does Not a Monk Make. Or Does It? Fake and Real Monks from the Orthodox East in the Russian Empire (19th — Early 20th Сentury)
Authors: Chrissidis Nikolaos
Published: May 2023

Monastic tonsure of citizens of the Russian Empire abroad became a particularly complex issue during the latter half of the nineteenth century, when Mt. Athos became a favorite destination of those interested in assuming the monastic habit outside the empire. The Russian authorities sought to control and regulate such tonsures by establishing procedures for checking their validity, and by ruling out automatic recognition of them in the empire. Individuals who were tonsured as monks abroad manipulated or tried to manipulate such regulations in order to facilitate travel back and forth from the Russian Empire for their own purposes. The result was that the real and apparent ambiguities that such rules allowed for were exploited by both state authorities and by real or fake monks themselves. The essay seeks to offer some perspectives on this phenomenon by focusing on four cases preserved in archival records.
Scientific Works of Olga Kosheleva
Authors: Yakovleva Tatiana
Published: May 2023

This publication contains a complete list of scientific works by Olga Evgenievna Kosheleva, Doctor of Historical Sciences, a leading researcher at the Institute of General History of the Russian Academy of Sciences. Like the first block of articles presented in this issue of the E-journal «History», it is timed to the anniversary of O. E. Kosheleva and fully reflects the versatility of her research talent — her interest in the history of cities, the history of childhood, the history of reading and translation, the history of everyday life and private life. No less important are the works of O. E. Kosheleva, devoted exclusively to archival research and to the methodology of history, primarily to the microhistoric approach to the study of the past.
Thermodynamic theory for evaporation processes. Mathematical modeling and verification.
Authors: Kharchenko S. V. , Zheliba Y. A. , Onistchenko V. P.
Published: May 2023

This paper presents the mathematical modeling of liquid evaporation processes from the capillary-porous solid surface and solids sublimation into gaseous medium of arbitrary composition. The authors proposed to describe evaporation processes in terms of the Isobaric-Isenthalpic Theory Framework. The equations of state with virial coefficients are suggested as groundwork of the method.
Welding fumes formation. Part IV. Multicomponent condensation
Authors: Vishnyakov V. I. , Dlubovsky R. M. , Kiro S. A. , Oprya M. V. , Ennan A. A.
Published: May 2023

The multicomponent condensation of gas-vapor mixture in the plasma of welding fume is studied. It is demonstrated that condensation of elements with the high pressure of saturated vapor (Si, Mn, Ca) occurs in the conditions of their unsaturated in gas-vapor mixture, and it is the cause of the change of element composition of the primary particles. The intensive growth of the nuclei occurs by their coalescence, in basic, and as a result the bimodal size distribution of the primary particles is formed. The structure – adsorption properties of the particles of welding fume, which formed when the electrodes ANO-4 and UONI 13/45 were used, are defined experimentally; and the comparison of the specific surface of these samples with the results of calculation is made.
Combustion characteristics of alkane two-droplet array. Part 1. Two droplet array of n-Octadecane
Authors: Orlovskaya S. G. , Karimova F. F. , Shkoropado M. S. , Kalinchak V. V.
Published: May 2023

Characteristics of ignition and combustion of two n-Octadecane droplets placed vertically are studied by videomicroscopy. Upper droplet burning histories are obtained for different droplet spacing, burning rate constants are determined. To clarify flame spread along fuel droplet array ignition delay is measured at different droplet spacing.
Unipolar charging of welding fume particles and their charge distribution.
Authors: Vishnyakov V. I. , Kiro S. A. , Oprya M. V. , Ennan A. A.
Published: May 2023

The experimental technique including the differential mobility analyzer and laser aerosol spectrometer is proposed for determining the charge distribution of aerosol particles charging by the corona discharge. The procedure of the experimental data processing, which does not require any theory of particle charging, also proposed. The welding fume particle size and charge distributions based only on the experimental data are demonstrated.
Novel alternative model of effective porosity for hydrophilic and/or hydrophobic thin permeable media
Authors: Rogankov Jr. O. V. , Shvets M. V. , Kalinchak V. V. , Rogankov V. B.
Published: May 2023

The proposed methodology is based on the novel analysis of the water vapor transmission rate through the thin natural and polymer materials including the semi-permeable membranes. The concept of such approach and its realization reveals the spectacular difference between the behavior of hydrophilic and hydrophobic systems. Due to this distinction, the realistic model of effective porosity has been proposed to eliminate the standard uncertainties at the determination of it by the conventional methodologies.
Solar multi-stage refrigeration systems. New developments and analysis of possibilities
Authors: Glauberman M. A. , Doroshenko O. V. , Kirillov V. Kh. , Antonova A. R. , Lyudnitsky K. V.
Published: May 2023

The developed schematics for the solar refrigeration systems, based on the use of absorbing cycle and solar energy for the regeneration of absorbent solution, are presented in the article. Cascade (two-stage) principle of construction of contours is used with growth of concentration of absorbent on the stages of cascade. Heat-ass-transfer apparatus of film-type, entering in the complement of contours compatible and executed on the basis of multichannel compositions from polymeric materials. The peculiarities of film-type flows are considered theoretically in the heat-mass-transfer apparatus of the basic planetary systems. The preliminary comparative analysis of possibilities of the solar refrigeration systems is performed.
The influence of metal filament on evaporation kinetics of suspended fuel droplet
Authors: Kalinchak V. V. , Chernenko A. S. , Darakov D. S. , Kopiyka A. K.
Published: May 2023

In terms of classical theory of a droplet evaporation, the effect of heat transfer through metal filament is considered taking into account Stefan flow and natural convection. Correction for heat transfer through the suspension, which allows adjusting the constant evaporation rate experimental values, was analytically obtained. Temperature dependence of evaporation heat and expansion feasibility of liquid fuel saturated steam pressure at the ambient gas temperature, in determining the droplets equilibrium temperature was also taken into account. The application of obtained amendments and digital image processing, taking into account the droplets non-sphericity in the gravity field has helped confirming the droplet vaporization d2-law.
Flame propagation in hybrid “coal-methane-air” aerosuspensions
Authors: Oparin A. S. , Sydorov O. E. , Bulanin Ph. K. , Shevchuk V. G.
Published: May 2023

Results of laminar flame propagation experimental studies on hybrid aerosuspensions «methane-coal-air» are presented. Combustion of fine coal dust clouds (r0 = 8 microns, volume 4 · 10-3m3) and iron oxide clouds (r0 = 5 microns, volume 4 · 10-3m3) is investigated in isobaric conditions. Volumetric methane concentration was 6%. Comparison of visible and normal flame propagation velocities of mixtures "methane - air", "methane - coal - air" and "methane - inert component - air" testifies that fine coal particles increase flame propagation rate.
Use meteotron I for coal mine ventilation
Authors: Kuznetsov A. A. , Konopasov N. G.
Published: May 2023

The meteotron characteristics with thermal power of 0.24 million kilowatts and experimental conditions on an open coal mine ventilation heat method are shown. Heat and mass transfer mechanisms are proposed in case of pronounced inversion gas layer. Experimental results are described and compared with the proposed mechanisms.
Self-organization of primary particles of welding fume
Authors: Vishnyakov V. I. , Kiro S. A. , Oprya M. V. , Ennan A. A.
Published: May 2023

The long-range interaction of the condensed particles of welding fume is studied. It is demonstrated that the long-range interaction is the result of the ionization equilibrium displacement near the charged particle surface. The long-range interaction with the electrical repulsing force leads to formation of the ordered structures of condensed particles. As a result the local number density of the condensed particles is increased, and their fast coagulation is possible.
Experimental studies of the oxidation of metal borides
Authors: Bulanin Ph. K. , Sуdorov A. E. , Poletaev N. I. , Shevchuk V. G. , Buynovsky S. N.
Published: May 2023

Low-temperature oxidation of metal borides particles energetic compounds conglomerates have been studied via thermogravimetry method. By oxidation activity borides can be arranged in the following series of TiB2, ZnB2, AlB2, B. Experiment showed the change of oxidation law temperature dependence from logarithmic to parabolic.
Using the effects of hydrodynamic cavitation for purposeful dynamical action on the supramolecular structures
Authors: Ivanitsky G. K. , Avdeyeva L. Y. , Makarenko A. A.
Published: May 2023

Evolution of the cavitation cluster and the level of the dynamic cavitation effects in liquid flow within a Venturi nozzle, depending on the design features and the mode of operation of this type cavitator, are considered. The experimental and theoretical investigations have been performed with the view to using the Venturi nozzle as cavitation reactor to efficient influence supramolecular structures in liquid in relation to producing stable liposome dispersions. Structural peculiarities of liposomes, closed biological nanocapsules, as well as bond energy values in these structures have been analyzed. The results of this study prove that using Venturi nozzles in large-scale production of liposome preparations allows increasing production capacity and significant reduction in the mass-related power consumption as compared with traditional acoustic and hydrodynamic methods.
Interaction of nano-sized particles in a dust-electron plasma
Authors: Vishnyakov V. I.
Published: May 2023

Dust-electron plasma, consisting of nano-sized particles and electrons emitted by them, is studied. It is demonstrated that the particle charge can be suitably divided into two parts: the own for each particle ``visible'' charge and the common charge of the neutralized background with assumption of almost uniform spatial distribution of electrons, that deviates from the uniformity only near the dust particles. The visible charge can be both negative and positive, while the total particle charge is only positive. The attraction of likely charged particles is possible, because the particle interaction is determined by the visible charges. The equilibrium state between attraction and repulsion of the particle is demonstrated.
Laser-induced controllable generation of micro-bubbles on water suspension of absorptive colloid particles
Authors: Angelsky O. V. , Bekshaev A. Ya. , Maksimyak P. P. , Maksimyak A. P. , Kontush S. M.
Published: May 2023

Micrometer-sized bubbles are formed in the water suspension with absorptive pigment particles due to local heating. The heating is performed by moderately focused CW nearinfrared laser radiation with controllable power. Depending on the laser power, regimes of the bubble generation, stable growth of the existing bubbles, stationary bubbles and their shrinkage and collapse are realized. The physical pattern is interpreted based on the temperature conditions in the suspension. We show the possibilities for generation of single bubbles as well as groups of bubbles with controllable sizes and numbers. The bubbles form quasi-ordered structures within the laser-illuminated region. They can be transported together with the focal spot. The results are useful for applications associated with the precise manipulation in nano- and micro-engineering problems.
Elongate coexistence curve and its curvilinear diameter as factors of global fluid asymmetry
Authors: Rogankov Jr. O. V. , Mazur V. A. , Kalinchak V. V. , Sergeeva A. E. , Levchenko V. I. , Shvets M. V. , Rogankov V. B.
Published: May 2023

Some inconsistencies of the conventional predictive methodologies applied in the region of vapor-liquid VLE-coexistence and its criticality are considered. As a rule, they are related to the semi-empirical concept of “rectilinear diameter” accepted in the temperature-density plane. The often curved, in practice, "rectilinear diameter” of coexistence curve (CXC) is discussable in both alternative descriptions of criticality: 1) by the Ising-based (Ib-) complete scaling phenomenology and 2) by the classical van der Waals-Maxwell-Gibbs-based (Wb-) phenomenology of VLE-transition. The latter has been essentially modified by the model of fluctuational thermodynamics (FT). The new transformation of CXC-representation based on the measurable equilibrium data obtained far away from criticality is proposed in the present work. It leads to the well-established location of critical point (CP) which corresponds to the intersection between the elongate CXC depicted in the compressibility factor-density plane and its strongly curvilinear here diameter. The universality of global fluid asymmetry (GFA)-principle introduced earlier by FT-model becomes apparent in the whole temperature range of VLE-transition. The developed predictive CP-methodology can be especially useful for the set of substances in which the direct experiment on criticality is hardly realizable.
Thermophysical and relaxation characteristics of two-phase systems based on metal-filled epoxy polymers
Authors: Sichkar T. G. , Vasylenko S. L. , Tulzhenkova O. S.
Published: May 2023

Using the theory of relaxation spectrometry, the specific heat of epoxy compositions filled with highly disperse powders of copper, nickel, and iron was investigated. The analysis of the results obtained led to the conclusions on the interaction between the polymer matrix and the filler surface.
Burning of Two-Fraction Coal-Air Suspension
Authors: Orlovskaya S. G. , Kalinchak V. V. , Zuj O. N. , Lisianskaia M. V.
Published: May 2023

Two fraction dust-air mixture is a simplest case of polydisperse suspension. So the purpose of this work is to study the characteristics of ignition and combustion of a two-fraction suspension of carbon particles in air at different temperatures. The main characteristics of fuels combustion are the ignition delay, the burning temperature and time, critical parameters (temperature, the particles diameters and mass concentrations), corresponding to fuel ignition and extinction. The high temperature heat and mass transfer and chemical kinetics are modeled for two-fraction gas suspension (diameter of fine particles 60 μm and that of coarse particles 120 μm).
ABORDAGEM GEOAMBIENTAL NA ANÁLISE DA DEGRADAÇÃO AMBIENTAL NA BACIA HIDROGRÁFICA DO RIO BANABUIÚ – CE / GEOENVIRONMENTAL APPROACH IN AMBIENTAL DEGRADATION ANALYSIS THE BASIN OF THE BANABUIÚ RIVER - CE
Authors: Costa Luis Ricardo Fernandes da , Santos Jader De Oliveira , Oliveira Vládia Pinto Vidal de
Published: May 2023

O artigo trata da questão geoambiental aplicada a bacia hidrográfica do rio Banabuiú, com o objetivo de apresentar e caracterizar os componentes setoriais e os sistemas ambientais, além de evidenciar os principais problemas ambientais da área. As bases conceituais estão elencadas na concepção holística, orientada para uma visão integrativa dos elementos da paisagem. A metodologia do trabalho, pautada nos estudos integrados, procura estabelecer a relação de variáveis biofísicas e estabelecer o mosaico para o estudo dos sistemas ambientais (SOUZA, 2000 e SOUZA et al., 2012). Os procedimentos metodológicos adotados foram baseados na proposta de Libault (1971) para a pesquisa em geografia. A abordagem procedida possibilitou, a partir de uma análise integrada, visualizar problemas complexos ligados as formas inadequadas de uso, ocupação e exploração dos recursos ambientais em bacia hidrográfica inserida no semiárido cearense.
A METODOLOGIA E O ENSINO DA GEOGRAFIA NOS ANOS INICIAIS DO ENSINO FUNDAMENTAL: UM ESTUDO EM GRAJAÚ-MA / THE METHODOLOGY AND THE TEACHING OF GEOGRAPHY IN THE EARLY YEARS OF ELEMENTARY EDUCATION: A STUDY IN GRAJÁU-MA
Authors: Silva Maria José Barros , Da Silva Marcos Nicolau Santos
Published: May 2023

Este trabalho objetivou analisar o ensino de Geografia nos 4º e 5° anos do ensino fundamental da Escola Municipal Educar para Crescer, localizada na cidade de Grajaú, Maranhão, assim como avaliar a metodologia das aulas de Geografia e o interesse dos alunos. A metodologia utilizada foi a pesquisa qualitativa e os dados foram coletados através de observação das aulas e entrevistas com as duas professoras regentes. Observou-se que os procedimentos metodológicos utilizados pelas professoras nas aulas de Geografia ainda são de forma tradicional, centrados principalmente no livro didático. Dessa forma, as aulas de Geografia tornam-se desestimulantes, como as demais disciplinas. Sem contrariar essa realidade, durante a observação, constatou-se a falta de interesse dos alunos pela disciplina.
A DINÂMICA DA PAISAGEM RESULTANTE DA EXTRAÇÃO MINEIRA NO POSTO ADMINISTRATIVO DE NAMANHUMBIR, DISTRITO DE MONTEPUEZ (2009-2014) / THE DYNAMICS OF THE LANDSCAPE RESULTING FROM THE MINING EXTRACTION IN THE ADMINISTRATIVE POSITION OF NAMANHUMBIR...
Authors: Ali Talassamo Saide
Published: May 2023

Com este trabalho, pretende-se analisar a dinâmica da paisagem resultante da extracção mineira no Posto Administrativo de Namanhumbir, Distrito de Montepuez, entre 2009 `a 2014. Namanhumbir é uma região geográfica, de acordo com a situação longitudinal, a latitude do país, a história geologia do planeta e de Moçambique, condicionada pela existência de diferentes recursos naturais. Alguns desses jazigos foram descobertos e extraídos deste a história da população local. Outros estão a ser descobertos e extraidos, ainda no período em análise, com particular destaque para o rubi e outras pedras preciosas e semi-preciosas. Antes de 2009, Namanhumbir era um lugar anónimo, ou seja, os impactos ambientais, sociais, económicos, culturais de maior destaque resultante da extracção das pedras preciosas e semi-preciosas demandam deste período. Entre 2009 `a 2014, Namanhumbir tornou-se bruscamente zona de referência mineira e de convergências culturais de africanos e asiáticos: moçambicanos (provenientes de diferentes pontos do país), somalis, nigerianos, senegalenses, tanzanianos, por um lado; por outro, tailandeses, chineses, paquistaneses, indianos e mais que, rapidamente, se configuram e lideraram a extracção e o mercado informal do rubi. Ainda em 2009, nota-se uma aparente legalização da actividade mineira com a instalação da Montepuez Ruby Mining Lda, uma joint venture da Mwirit e Gemn Field, sendo esta última de capitais inglês. A implantação deste consórcio e a proliferação do garimpo ilegal, em Namanhumbir, os espaços baldios passaram a ser assentados e a população, sobretudo crianças e jovens, abandonaram a escola. No caso específico dos jovens, estes deixaram de praticar a agricultura e passaram a extrair recursos minerais. Os campos agrícolas foram transformados em zonas de extracção mineira. Os povoamentos concentrados rurais foram transformados em povoamento linear[1], localizado ao longo da estrada nacional. Os rios passaram a ter novos usos, como lavagem de “camadas”[2]. A vegetação foi destruída, os solos degradados e a fauna ameaçada. A conjuntura desses fenómenos imprimiu uma nova dinâmica paisagística em Namanhumbir.key-wordos: Namanhumbir, dinâmica, paisagem, extracção, mineira. [1] Um autêntico “califado mineiro”, no qual a legislação mineira não tem qualquer relevância na regulação da actividade.[2] Porções de solos extraídos do subsolo submetidos a pesquisas geológicas empíricas.
RESENHA - SANTOS, Milton. Por uma outra globalização
Authors: Moraes da Silva Jhon Cleber
Published: May 2023

RESENHA - SANTOS, Milton. Por uma outra globalização: do pensamento único a consciência universal. 6ª Ed. Rio de janeiro: Editora Record, 2001.
SEGREGAÇÃO OU INTEGRAÇÃO DOS ESPAÇOS PÚBLICOS URBANOS: UMA ANÁLISE DA ZONA NORTE DE MACAPÁ–AP / SEGREGATION OR INTEGRATION OF URBAN PUBLIC AREAS: AN ANALYSIS OF THE NORTH OF MACAPÁ–AP
Authors: Palheta Ana Corina , Santos Terena Brito dos , Serdoura Francisco
Published: May 2023

RESUMO A segregação ou integração dos espaços públicos nas cidades estão diretamente relacionados com a qualidade de vida de uma determinada população, juntamente às demais condições urbanas e ambientais que devem estar em harmonia com a natureza e os seres humanos. A partir desse conceito, nesse artigo, será analisada a Zona Norte da cidade de Macapá, capital do Estado do Amapá, Brasil. Esse espaço é fruto da área de expansão da urbe e apresenta uma relação apática para com os espaços públicos existentes. A metodologia aplicada será através das diretrizes da Sintaxe Espacial para se obter mapas que indicarão as Áreas de Segregação (AS) e as Áreas de Integração (AI) para que sejam analisadas suas relações com as funções da cidade, baseada na Lei de Uso e Ocupação do Solo. Almeja-se sugerir os locais potencialmente qualificados à abertura de espaços públicos que sirvam como ponte de integração às áreas identificadas como segregadas. Palavras-chave: segregação/integração, espaços públicos, Zona Norte de Macapá.
A MERCANTILIZAÇÃO DA NATUREZA EM 20 ANOS DE POLÍTICAS DE DESENVOLVIMENTO SUSTENTÁVEL NO ACRE (1998-2018) / THE MERCANTILIZATION OF NATURE IN 20 YEARS OF SUSTAINABLE DEVELOPMENT POLICIES IN ACRE (1998-2018)
Authors: Moura Julia Lobato Pinto de
Published: May 2023

Este artigo é uma reflexão sobre as principais transformações na dinâmica territorial e na produção do espaço econômico vivenciadas no Acre neste período de 20 anos de governo liderado pelo Partido dos Trabalhadores (PT). Procura-se colocar no centro do debate os processos de mercantilização da natureza e desterritorialização das populações tradicionais ocultados pela publicidade política e os limites, dentro da ordem do capital, de um governo progressista. Este artigo é resultado ampliado de uma pesquisa essencialmente qualitativa, iniciada em 2014, durante o curso de Mestrado em Letras: Linguagem e Identidade, no qual discuti o mito do desenvolvimento na Amazônia acreana, entre os anos 1999-2015. O caminho teórico-metodológico que embasou a reflexão teve como referenciais autores ligados ao campo dos Estudos Culturais como Raymond Williams (2011), além de um amplo conjunto de dissertações, teses e publicações sobre o Acre e suas transformações mais recentes, que produzem contra-discursos com as quais dialogo. Ao longo da análise procuro identificar a dinâmica de produção do espaço e os aspectos econômico-ecológicos deste ciclo de governança, e como as transformações que fizeram do Acre um pretenso “modelo” de sustentabilidade inserem-no em um contexto mais amplo de reordenamento do capital global diante da crise ambiental e todas suas dimensões.