bluuebunny/crossref_metadata_2025 huggingface dataset:
Impact of the Allocation of Economic Resources on the Spatial Organisation of the Russian Economy
Authors:   Financial University under the Government of the Russian Federation, Stroev P. V.
Published: December 2023

Distribution of economic resources across Russian regions has attracted wide attention due to its significant impact on economic growth potential. Despite numerous approaches to the definition and classification of economic resources, there is no unified comprehensive methodology for assessing their spatial distribution and influence on spatial organisation of the national economy. Therefore, this article aims to study the organisation of the Russian economic space by identifying areas of resource concentration in regions, their spatial relationships and impact on socio-economic development. To this end, index and statistical methods, correlation and regression analysis, cartographic analysis are applied. In accordance with the modern strategic approach to the spatial development of Russia, the study examines the macro-regional level. Natural resources, human capital, and economic development indices were calculated in order to assess the distribution of economic resources and formation of layers (natural, social, productive) of the spatial framework of Russia. These indices are based on socio-economic indicators of Russian regions for 2010 and 2021. To determine areas of resource concentration, a correlation and regression analysis of the influence of indices as a numerical expression of layers of the spatial organisation was performed. A synthesis of the formed layers revealed the following Russian macro-regions of concentration of various economic resources and potential backbone regions of the spatial framework: Central (Moscow, Moscow and Kaluga oblasts), Ural-Siberian (Yamalo-Nenets and Khanty-Mansi Autonomous okrugs, Tyumen oblast), Central Black Earth (Voronezh and Belgorod oblasts), Northwestern (St. Petersburg, Leningrad and Murmansk oblasts). The findings can be used to identify ways to improve the organisation of the Russian economic space, increase the effectiveness of regional development policies and expand the methodology for assessing and forming other spatial layers of the economy.
WATER – ALKYLBENZENESULFONIC ACID – HYDROCHLORIC ACID SYSTEM FOR EXTRACTION-PHOTOMETRIC DETERMINATION OF COPPER (II) WITH 1,2,3-BENZOTRIAZOLE
Authors:   Institute of Technical Chemistry, Zabolotnykh S.A. , Denisova S.A. ,   Perm State University, Manylova K.O. ,   Institute of Technical Chemistry
Published: December 2023

Optimal concentration parameters of the extraction process in the water – alkylbenzenesulfonic acid – hydrochloric acid system in the presence of 1,2,3-benzotriazole (БТА) were found out. The total system volume (up to 50 ml) contained ABSA and BTA at the ratio 3:4 (0,6 g of ABSА and 0,8 g of BTA), at concentration of HCl varying from 0 to 0,1 mol L-1. The possibility of extraction-photometric determination of 92–740 μg of copper (II) in the system was established.
DISTRIBUTION OF METAL CATIONS IN THE AQUEOUS STRATIFIED SYSTEM OF ANTIPYRINE, SODIUM SULFATE
Authors:   Perm State University, Yuminova А.А. , Degtev М.I. ,   Perm State University, Maksimov А.S. ,   Perm State University, Kharina V.А. ,   Perm State University
Published: December 2023

The possibilities of a new exfoliating extraction system without organic solvents with the participation of antipyrine, sodium sulfate and water are studied. The optimal conditions for delamination of the aqueous system are determined depending on the concentration of the components. It is shown that the organic phase is used to extract complexes of the introduction of macroquantities of gallium (III), indium (III), thallium (III), and scandium (III). The physicochemical and chemical methods determine the ratios of the components in the complexes. The antipyrine-sodium sulphate-water separation system is proposed for the isolation and determination of microquantities of Fe (III), In, Sc, Mo, and Th using an inductively coupled plasma emission spectrometer iCAP 6500.
ANODIC PROCESSES ON MANGANESE MONOSILICIDE IN SODIUN HYDROXIDE SOLUTIONS
Authors:   Perm State University, Polkovnikov I.S. , Shaydullina A.R. ,   Perm State University, Panteleeva V.V. ,   Perm State University, Shein A.B. ,   Perm State University
Published: December 2023

The anodic behavior of the MnSi electrode in solutions (0.5 - 3.0) M NaOH in the region of potentials from the corrosion potential up to the potential of oxygen evolution inclusive was studied by polarization and impedance measurements. It is concluded that the surface of manganese silicide in the alkaline electrolyte is enriched with the metallic component of the alloy and the products of its oxidation. The kinetic regularities of the anodic behavior of MnSi have been determined, the mechanisms of dissolution and passivation of the silicide have been clarified, the kinetic parameters of oxygen evolution have been determined.
INVESTIGATION OF CALCIUM SULFATE PRECIPITATION INHIBITION BY SODIUM CARBOXYMETHYLCELLULOSE AND POLYACRYLAMIDE
Authors:   Perm State University, Kistanova N.S. , Leontyev P.Yu. ,   Perm State University, Kudryashova O.S. ,   Institute of Natural Science, Perm State University
Published: December 2023

The influence of concentration inhibitors, calcium/sulfate ratios on the precipitation of calcium sulfate was studied. The efficiency of inhibition in the presence of carboxymethylcellulose and polyacrylamide was estimated from measurements of the calcium concentration in the supersaturated solutions during the precipitation process by the standard procedure of complexometric titration. Sodium carbox-ymethylcellulose with the degree of polymerization of 1000 units was found to be the most effective in preventing the crystallization gypsum. Polymer concentrations as low as 0,5 g/L increases induction time, preceding the formation of the gypsum to 200 min; 1,0 g/L increased to 600 min. Mixing of equal volumes of stock solutions of calcium chloride and sodium sulfate results in final concentration 24 g gypsum per litre solution.
EFFECT OF SURFACTANT DIFFERENT NATURE ON SPECTROPHOTOMETRIC CHARACTERISTICS OF THE SCANDIUM COMPLEX WITH XYLENOL ORANGE
Authors:   Perm State University, Denisova S.A. , Lesnov A.E. ,   Institute of Technical Chemistry,   Perm State Agro-Technological University
Published: December 2023

At various pH values, the effects of surfactants of different types have been studied: catamine AB, oxy-phos B, synthanol ALM-10 on the spectrophotometric characteristics of scandium with xylenol orange (XO). For complexation of scandium with XO, the optimum pH range is 1.56–2.44, the introduction of catamine AB under these conditions does not significantly affect the spectrophotometric characteris-tics of the complexes. The bathochromic shift from 508 to 637 nm and an increase in the intensity of light absorption by almost three times in the XO – Sc system — katamine AB occurs at a pH of 6.15 in the presence of 5.2 ·10–4 M concentration of katamine AB, however, the stability of the complexes up-on standing does not exceeds 30 minutes. Saturation and isomolar series at pH 1.56 determined the composition of Sc complexes with xylenol orange. In the absence of surfactant, the Sc: XO compound of 2:1 is first formed, and with an excess of reagent it goes into a 1:1 complex, in the presence of katamin AB, a 1:1 complex is formed, and with an excess of reagent 1:2. Oxyphos B and synthanol ALM-10 practically do not affect the process of complexation of scandium with XO.
SYNTHESIS OF REDOX-ACTIVE POLYMER BASED VERDASIL BIRADICAL
Authors:   National Research Ogarev Mordovia State University, Kostryukov S.G. , Kraynov E.V. ,   National Research Ogarev Mordovia State University, Kozlov A.Sh. ,   National Research Ogarev Mordovia State University, Chernyaeva O.Yu. ,   National Research Ogarev Mordovia State University
Published: December 2023

A redox-active polymer based on a verdazyl biradical - 4,4'-bis(3-(4’-hydroxyphenyl)-5-phenylverdazyl-1)-1,1'-biphenyl and 2,4-toluene diisocyanate was obtained. Verdazyl radical, being a diatomic phenol, easily reacts with toluene diisocyanate to form polyurethane. The presence of ure-thane bonds in the polymer molecule was confirmed by IR, and the presence of radical centers by EPR spectroscopy. The cyclic voltammetry method showed the ability of a polymer to undergo reversible redox transitions.
THERMAL DISSOCIATION AND BIOLOGICAL ACTIVITY OF THE PRODUCTS OF SPYRO-HETEROCYCLIZATION OF PYRROLOBENZOXAZINETRIONES UNDER THE ACTION OF THIOBENZAMIDE
Authors:   Perm State University, Kobelev A.I. , Balandina S.Yu. ,   Perm State University, Maslivets A.N. ,   Perm State University
Published: December 2023

The reaction of pyrrolobenzoxazinetriones with thiobenzamide was investigated, and the mechanism of thermal dissociation of the products was proposed. It was found that the products of this interaction are reversibly dissociated to the initial reagents.Antimicrobial activity was found in the synthesized compounds.
Electrocatalytic activity of Ti3SiC2/TiC composite materials in hydrogen evolution reaction in 0,5 mol/l H2SO4 solution
Authors:   Perm State University, Firsova Olga A. , Panteleeva Viktoriya V. ,   Perm State University
Published: December 2023

The electrochemical activity of Ti3SiC2/TiC composite materials obtained by spark plasma sintering of a mechanoactivated mixture of 3Ti/1,25SiC/0,75C in 0,5 M H2SO4 solution has been studied. It is shown that the cathode potentiostatic curves of Ti3SiC2/TiC electrodes have the same type and are characterized by the presence of Tafel section with constants a and b equal to -(0,44–0,62) and -(0,060–0,075) V, respectively. An increase in the content of the Ti3SiC2 phase in the composition of the composite material leads to an increase in the rate of the hydrogen release reaction. It is concluded that Ti3SiC2/TiC composite materials in sulfuric acid electrolyte are promising for the electrolytic production of hydrogen.
ÖRGÜTSEL DEĞİŞİME AÇIKLIĞIN İŞ BECERİKLİLİĞİNE ETKİSİNDE ALGILANAN KAPSAYICI LİDERLİĞİN ARACILIK ETKİSİ: BANKACILIK SEKTÖRÜNDE BİR ARAŞTIRMA
Authors: CANBOLAT Mehmet Ali , KARAGÖZ Hüseyin
Published: December 2023

Banka çalışanlarının örgütsel değişime açıklıklarının iş becerikliliğine etkisinde kapsayıcı liderlik algılarının aracılık rolünün test edildiği araştırma 139 çalışan ile yürütülmüştür. Nicel araştırma deseninde ve kesitsel tipte planlanan araştırmada veri toplama aracı olarak anket tekniğinden yararlanılmıştır. Elde edilen veriler doğrultunda öncelikle ölçeklerin güvenilirlikleri ve geçerlilikleri sınanmış ardından veri analizleri uygulanmıştır. Analiz bulgularına göre değişkenlerin birbirileri ile istatistiksel olarak anlamlı ilişki içerisinde oldukları, örgütsel değişimin kapsayıcı liderlik algısına, kapsayıcı liderlik algısının iş becerikliliğine ve örgütsel değişime açıklığın iş becerikliliğine anlamlı ve pozitif yönde etki ettiği tespit edilmiştir. Literatürde daha önce incelenmeyen bu değişkenler ile örgütsel değişime açıklığın iş becerikliliğe etkisinde kapsayıcı liderlik algısının aracılık rolü üstlendiği görülmüştür. Bu durumda dinamik bir yapıda olan bankacılık sektöründe örgütsel değişime açık olan banka çalışanlarının iş becerikliliğinin artırılmasında kapsayıcı liderlik stilinden yararlanılması gerektiği önerisinde bulunulabilir. Araştırmanın sadece Karaman yürütülmesi sonuçların genellenebilirliğini sınırlamıştır.
A New Qualitative Measurement Of Customer Expectations And Satisfaction And Cross-Brand Comparison In The Automotive After Sales Services Industry
Authors: ŞEHİRLİ Mustafa
Published: December 2023

This research aims to reveal the Kano model, one of the models developed to gain loyalty by determining customer expectations and satisfaction, using a qualitative method, testing it with real experiences, and comparing it with other measurement methods. The research was conducted qualitatively and quantitatively on six different brands and 12 customers in the field of automotive after-sales services and quantitatively on 21 customers. The results were compared with the quantitative results of the same customers and other customers and with other results in the literature. In addition, the sector's situation was revealed by evaluating the table of customer expectations based on real and exceptional experiences. According to the results, as expected, the "must-be" service expectations are the expectations that are met the most. On the other hand, attractive service expectations are met at a lower level, even though their number is lower. Two brands that stand out positively from the others in the industry perform better, especially in attractive services. At the end of the research, the qualitative determinations showed different results than the quantitative ones. Customers expressed higher expectations in the qualitative measurements. Thus, it has been shown that this method is more insightful and challenging for managers, that brands need to turn to particularly attractive services to gain a competitive advantage, and that there is a gap in the industry. At the end of the research, some practical suggestions for managers were expressed.
History of Russian Entrepreneurship in China the First Half of the XX Century in the Mirror of Advertising
Authors: Khisamutdinov Amir , Gao Mingyue
Published: December 2023

The study is devoted to the history of Russian entrepreneurs in China in the first half of the twentieth century as it was reflected in the advertising of their business, placed mainly in local periodicals. During this period, Russian entrepreneurs achieved significant commercial success in many Chinese cities. The promotion of their products in the Chinese domestic market was largely the result of their skillful advertising activities. Advertising in Russian became especially widespread in China after the end of the Civil War in Russia. The most important centers of entrepreneurial and advertising activity of Russian entrepreneurs have become the Chinese cities of Harbin, Tianjin and Shanghai. Advertising activities reflect both the economic sphere of life of the Russian diaspora and the social needs of its representatives. In the course of studying the history of Russian entrepreneurship and advertising of business enterprises owned by immigrants from Russia, the authors repeatedly conducted field research in China, during which they studied former Russian commercial enterprises, often operating at the present time. Sources on the research topic also included documents in Russian and Chinese stored in museums and libraries in Heilongjiang province, Harbin and Shanghai.
Mongolia and COMECON: Experience of Successful Cooperation
Authors: Kuzmin Yuriy
Published: December 2023

The article provides an analytical review and assessment of the collection of documents “Mongolia in the COMECON: On the Path of Eurasian Economic Integration. 1961–1991.” (M., 2023). The collection includes 267 original archival documents reflecting the main directions of economic cooperation between Mongolia and the Council for Mutual Economic Assistance over 30 years. Previously unpublished materials (some of which have been declassified specifically for this publication) from the collections of leading Russian and Mongolian archives clearly demonstrate the scale, mechanisms and forms of interaction between Mongolia and the central apparatus of the COMECON and individual member countries of the organization. The positive experience of international cooperation within the framework of an intergovernmental economic organization that united the countries of the socialist community, accumulated on the pages of the collection under review, acquires particular value in the context of the regionalization of the modern world economy.
Book Review: Southern African Moths and their Caterpillars
Authors: Geertsema Henk
Published: December 2023

Southern African Moths & Their Caterpillars, Hermann Staude, Mike Picker and Charles Griffiths, 2023. 
Struik Nature/Penguin Random House South Africa. ISBN 978 1 77584 795 (Print), ISBN 978 177584 796 0 (ePub). Paper back R 550; Pelagic Publishing (UK) ISBN 99781784273477. Paper back ₤39.99. 464 pp.
Radnički i socijaldemokratski pokret u radovima Mirjane Gross
Authors: Držaić Karlo
Published: December 2023

In this article, the author singles out the historiographic work of Mirjana Gross on the topic of labour and social democratic movements in Croatia in the long nineteenth century, highlighting and separately analyzing the important contributions with regard to theoretical approaches and applied methodologies. The author specifically questions whether Gross applied Marxist concepts in these works and whether they can be considered Marxist historiography. These works are furthermore contextualized within the framework of contemporary Croatian and European historiography. The author concludes that Gross followed the developmental trends of European historiography, that her research was grounded in characteristically Marxist paradigms, and shows how her theoretical understandings shifted in the direction of developed structuralism and post-structuralism. The article provides an overview of Croatian historiography on labour and social democratic movements, and more important recent works of European historiography are considered.
Ženska povijest na valovima feminizma
Authors: Ograjšek Gorenjak Ida
Published: December 2023

The article analyzes the entangled history of feminism and women’s history over the long period from the emergence of feminist thought to the challenges and changes of the 21st century. Based on the concept of four waves of feminism, the paper is organized into four separate chapters that show the development of feminism, women’s history, Croatian feminism, and finally the history of women in Croatia in each phase, while seeking continuities and discontinuities, links and points of divergence. It concludes that women’s history and feminism are intertwined at the theoretical, social and cultural-political level. They open and consider similar questions, and borrow patterns, terminology and arguments from each other. They were supported, conceived and implemented by the same circle of women and men, especially in the second wave, which played a key role in the creation and representation of contemporary feminism. During the third wave, there is a separation of the activist and theoretical aspects of feminism, as well as the emancipation of women’s history from its status as a political tool of feminism. However, the emergence of the fourth wave has shown that feminist criticism of society is not exhausted, nor is its connection to women’s and gender history. Feminism in Croatia developed simultaneously as an indigenous and imported concept. Although feminist ideas undoubtedly come from Western countries and we can follow similar trends in Croatian and global feminism in each wave, they were also implemented and adapted to local political and social circumstances and needs: national movements, socialism, war, transition or European integration. Finally, women’s history in Croatia developed in accordance with the achievements of local feminism, historiography and socio-political circumstances. Numerous similarities with general trends can be traced: a closer intermingling with the women’s movement and feminism, political engagement during the first and second waves, and the heterogeneity of approaches and themes since the end of the 20th century. However, the dynamics of its development, choice of topics and popularity were also determined by political context.
Investigação dos parques urbanos e sua conexão com o setor imobiliário em Cuiabá, Mato Grosso.
Authors: Oliveira Poema Bidarra , Paula Diana Carolina Jesus de , Godoy Jeane Aparecida Rombi de
Published: December 2023

O contínuo crescimento demográfico em áreas urbanas, é um dos aspectos que coloca em destaque, sobretudo, o debate de questões ambientais relacionadas ao desenvolvimento das cidades e a expansão imobiliária próxima às áreas verdes. Convém destacar que as áreas verdes tendem a valorizar os imóveis próximos, aumentando seu valor de venda ou atraindo novos investimentos, que utilizam os espaços verdes como estratégia de negócio. Assim sendo, os parques urbanos se tornam um elemento de valorização da região em que estão localizados. Nesse sentido, o objetivo deste estudo é investigar os parques urbanos situados na região norte de Cuiabá/MT, no período de 2005 a 2020. Para isso, foi preciso classificar o solo de acordo com o uso e ocupação e utilizar a Planta de Valores Genéricos, para verificar o valor do m² definido pela Prefeitura Municipal de Cuiabá. Como resultado, foi possível classificar o uso e ocupação urbana, bem como o valor do metro quadrado das ruas no período estudado. Observa-se que dentre os parques estudados da região norte, o Parque Massairo Okamura foi o mais valorizado durante os anos analisados.
RETURN TO NATURAL CHILDBIRTH: ARE OUR MIDWIVES READY FOR THIS? A CROSS-SECTIONAL STUDY FROM WESTERN TURKEY
Authors: BALKAYA Nevin Akdolun , AMANAK Keziban , UYAR HAZAR Hale
Published: December 2023

This study aimed to report current knowledge and opinions of midwives regarding natural birth. Cross-sectional data were collected from 213 midwives. Data were analyzed using descriptive statistics and Chi-square test. Midwives’ mean age and work experience were 37.85±5.81 and 18.36±6.49 years, respectively. Midwives assisted in normal births (65.3%), C-sections (33.3%) and natural births (1.6%), and indicated that the C-section is the riskiest birth (72.3%). Only 35% of midwives had received childbirth preparation classes training. Many midwives did not know about natural birth at all (21.2%) or about preparations for natural birth (41.7%). The midwives supported normal and natural births and believed such births to be healthy, but were not knowledgeable regarding natural birth and preparations for natural birth, and continued conventional birth practices.
Historia, etnografía, memoria. Una reflexión a partir de Walter Benjamin y José María Arguedas
Authors: Kingman Garcés Eduardo
Published: December 2023

El texto toma como referente la forma en que Walter Benjamin entiende el trabajo de la memoria, su relación con las nociones de experiencia, inconsciente actualización del pasado en el presente, para analizar, en primer lugar, la relación entre memoria e historia, y, en segundo lugar, los alcances y los límites de José María Arguedas como etnógrafo, escritor y poeta, anclado en los Andes. Lo más importante en este caso es la estrecha relación de la obra de Arguedas con la memoria y con formas de experiencia estrechamente vinculadas con la vida de las comunidades, así como con las ruinas, los apus y los no humanos. Del mismo modo, me interesa entender la relación de estos dos pensadores con las ideas de progreso y de catástrofe.
Confinamiento: una elección imposible para los más pobres
Authors: Ortiz Montero Llanos
Published: December 2023

El confinamiento contra la COVID-19 fue una de las medidas más globalizadas en el 2020. Sin embargo, su implementación e impacto en diferentes poblaciones fue muy dispar y su efecto en poblaciones del Sur Global sigue ampliamente invisibilizado aun tres años después.
Este artículo, basado en un estudio cualitativo multisituado, es un acercamiento a esas otras realidades que quedaron ocultas. Explora diferentes experiencias del confinamiento y cómo se aplicaron en poblaciones de pocos recursos, desde la percepción de trabajadores humanitarios. Aunque los datos muestran que el confinamiento pudo contribuir a reducir la trasmisión y la mortalidad al inicio de la pandemia, los impactos adversos derivados de su universalización y duración hacen cuestionar el equilibrio riesgo/beneficio considerado para colectivos vulnerabilizados sin recursos, para quienes era inviable su implementación. Datos del estudio muestran la percepción de que, al poco tiempo de instaurarse, el confinamiento se instrumentalizó con fines más políticos que sanitarios.
La sindemia devenida de la COVID-19 ha dado visibilidad a una relación entre el Norte y el Sur Global caracterizada por la hegemonía de los países más ricos en la toma de decisiones sobre políticas de salud. Estados, instituciones como la OMS y también organizaciones humanitarias han fracasado a la hora de adaptar las medidas a las diferentes poblaciones y apoyar a los más vulnerabilizados, poniendo de manifiesto resquicios colonialistas bajo nuestro concepto de salud global.
Chemical indicators of the quality of Varaždin pumpkin seed oil
Authors: Makovec Melita , Šimunić-Mežnarić Vesna , Vincek Valentina , Vincek Dragutin
Published: December 2023

Varaždin pumpkin seed oil is a virgin edible oil obtained by roasting and mechanically pressing dry pumpkin seeds (Cucurbita pepo L.). The aroma is dominated by a sense of toastiness interwoven with a specific nutty taste without any foreign or rancid smell or taste. It is dark green to black in colour with a reddish glow. It is characterized by fragrant, spicy notes and a well-balanced bouquet. The basic quality chemical parameters of Varaždin pumpkin seed oil monitored over the past eight years show that the proportion of free fatty acids (expressed as oleic) is less than 1%, which indicates good quality of the raw material and the applied oil production technology. The peroxide value is less than 4 mmol O2/kg, which is an indicator of good oxidation stability of the oil during its storage. The average value of the representation of unsaturated fatty acids is more than 80%, and variations in the fatty acid composition are the result of specific climatic conditions occuring in the year of growing and harvesting pumpkins.
Multiclavula mucida (Basidiomycota) a Pannon régióban és más adatok a magyarországi lopvanősző flórához
Authors: Csiky János , Deme Judit , Erzberger Peter , Kovács Dániel , Németh Csaba , Sipos Attila
Published: December 2023

The paper deals with the species found during cryptogamic flora mapping in 2023 that are remarkable from a floristic, taxonomic or conservational point of view. We present data from the Bükk Mts of two Trapeliopsis species which appear to be rare in Hungary. Multiclavula mucida, which is ap­parently a rare basidiomycete lichen species in Europe that prefers humid, montane habitats was dis­covered in the Mecsek Mts as a new species for the Hungarian flora. Of the knothole moss, Anacampto­don splachnoides, which is now thought to be entomophilic, we communicate the only extant popula­tion from Southern Transdanubia. We report the first occurrence of the atlantic-mediterranean Lepto­don smithii from the Hungarian side of the Great Hungarian Plain. Numerous data of the corticole Neck­era pennata indicate that in Hungary the distributional centre of this species is situated in the county of Baranya in the lowlands. New data from the Bükk Mts underline that in the Pannonian region Buxbaumia viridis is primarily a terricole species of acidophilous beech forests. We communicate the first occurrence from the lowlands of the alien lignicolous Sematophyllum adnatum which is danger­ous­ly spreading in Europe, at the same time one of the most vigorous populations in the Pannonian region. The third Hungarian occurrence of Callicladium haldanianum, a species that seems to spread in bogs, as well as the second occurrence of Racomitrium lanuginosum, growing abundantly on an ande­site boulder scree in Mátra Mts, are also reported here. Of Phegopteris connectilis we present in photo­graphic docu­mentation the first extant population from Southern Transdanubia, and we discuss whether the first publication from Mecsek Mts is correct or exact. In addition to listing the floristic data, we also briefly discuss the (mis)use of distribution data in the context of climate change, the difficulties of distinguish­ing the microtaxa of some pteridophytes, e.g. Asplenium adiantum-nigrum agg. and Dryop­teris affinis agg., and we correct one of our previously published, erroneous Hedwigia stellata data. Some interest­ing data of other taxa (such as Leucobryum glaucum, Palustriella commutata, Tetraphis pellucida, Gym­nocarpium robertianum, Ophioglossum vulgatum) are also mentioned in the paper.
Ajusticiados políticos en impresos mexicanos del periodo revolucionario
Authors: Monroy Sánchez Grecia
Published: December 2023

En el contexto de lucha armada y crisis política iniciado con la Revolución mexicana en 1910, la imprenta de Antonio Vanegas Arroyo (1880 a 1917, Ciudad de México) ofreció materiales que forman parte de una larga tradición de literatura de patíbulo en México, de la cual hay corpus identificados, así como estudios que la abordan más o menos directamente, pero sobre la cual aún hay mucho por explorar. Los impresos patibularios del periodo revolucionario coinciden en ofrecer una perspectiva hostil a los protagonistas de la Revolución y que se pueden dividir en dos subconjuntos: 1) aquellos en los que hay un uso falaz de la palabra «fusilamiento» y de algunos recursos de la literatura patibularia; y 2) noticias del fusilamiento efectivo de supuestos criminales. Del primer conjunto destaca la presencia de recursos narrativos que propician la empatía o el retrato ambiguo del potencial ejecutado. El segundo conjunto ofrece textos más cerrados y dirigidos explícitamente a que el castigo de los reos sea un ejemplo que disuada a otros que pretendan seguir sus pasos.
Relapsing Polychondritis with Laryngotracheal Involvement: A Case Report
Authors:   Department of Otorhinolaringology-Head & Neck Surgery, Faculty of Medicine, Universiti Kebangsaan Malaysia, Jalan Yaacob Latif, Bandar Tun Razak, 56000 Kuala Lumpur, Malaysia.
Published: December 2023

Relapsing polychondritis is a progressive multisystemic disease affecting primarily cartilaginous tissue of otorhinolaryngologic structures. Because of its rarity and progressive involvement of multisystem, diagnosing and managing a relapsing polychondritis is a clinical challenge, especially when it involves laryngotracheal cartilages, which can be critical and potentially life threatening. We reported a case of a 56-year-old man who presented with progressive shortness of breath and noisy breathing due to thickening of laryngotracheal cartilages. A diagnosis of relapsing polychondritis was made after considering his clinical, histological and radiological findings. Eventhough relapsing polychondritis with laryngotracheal cartilages involvement was rare and the nature of this disease was progressive, it was still advisable to consider a diagnosis of relapsing polychondritis whenever encountered cases of airway obstruction with evidence of thickened trachea, despite the other systemic manifestations did not reveal yet. Generally, systemic corticosteroid and other immunosuppressive agents are the treatments of choice in most cases however, when laryngotracheal cartilages are involved, emergency tracheostomy will be indicated.
Mathematics in the Preparation and Sale of Colombian Rice Pies and Its Potential Contribution to Mathematics Education
Authors: Aroca Araújo Armando Alex , Cervantes Wilches Andrea Paola , Silva Carreño María Ofelia
Published: December 2023

Background: The pastel de arroz [rice pie] is part of the traditional foods of the Colombian coast. Its preparation and sale encompass various unconventional mathematical processes. At this point, ethnomathematics allows the study of such processes without separating them from the social and cultural environment where they are employed. Objective: To study the mathematical processes involved in preparing and selling rice pies from an ethnomathematical perspective. Design: A qualitative methodology was applied for this purpose through an ethnographic approach. Setting and participants: Two cooks who are experts in making rice pies and are recognised for their work participated in the study. Data collection and analysis: Semi-structured interviews and participant observation were used as data collection methods, and electronic devices were also used to collect audiovisual material. The analysis of the information was categorical. Results: Among the main results, measurement processes, the use of non-conventional measurement units, and the use of mathematical processes, such as groping and the simple rule of three, for determining the quantities of ingredients and the price of the pies are identified. Conclusions: The stages of the preparation of the rice pies and the mathematical processes that are implicitly developed in them are exposed, and the importance of the connections of the results with topics related to school mathematics education and its potential contribution to this field is raised.
Perianal Langerhans hücreli histiyositoz
Authors: GÖRAL Vedat , ALTUN Ece , ÖZDEN Ferhat , SEVİNDİK Ömür Gökmen , GÖRAL Kerem Mert
Published: December 2023

Langerhans hücreli histiyositoz, nadir görülen ve patogenezi henüz tam olarak bilinmeyen bir hastalıktır. Etiyolojisinde çevresel etmenler, enfeksiyonlar, immünolojik ve genetik etkenlerin rol oynadığı düşünülmektedir. Langerhans hücreli histiyositoz, antijen sunan hücrelerin bir bozukluğudur. Monositer fagositer sistemin en sık görülen hastalığıdır. Bazen dendritik hücrelerin nasıl çalıştığını kontrol eden genlerde mutasyonlar (değişiklikler) gelişir. Bunlar BRAF, MAP2K1, RAS ve ARAF genlerinin mutasyonlarını içerir. Histopatolojisinde; Langerhans hücreleri kadar T-hücreleri, eozinofil, makrofajlar gibi inflamasyon hücreleri yanında, çok çekirdekli dev hücreler dikkati çeker. Hastalığın klinik olarak geniş bir yelpazesi vardır. Tutulan doku ve organlara göre klinik seyir çeşitlilik gösterir. Klinikte bazen kendiliğinden iyileşme olabildiği gibi, hastalık ilerleyici ve ölümcül de olabilir. Burada uzun yıllar tedavi sonunda Langerhans hücreli histiyositoz tanısı alan bir vakayı sunacağız.
Unusual esophageal foreign body: Metal bottle cap
Authors: ÇAPAR Halil , ÖLMEZ Şehmus , ÇETİN Duran Deha , MUSLU Mustafa , SARITAŞ Bünyamin
Published: December 2023

Foreign body of esophagus is frequently an emergency encountered in gastroenter-oogy clinic practice. Endoscopic treatment is effective and safe. Metal bottle cap is rarely swallowed. Metal bottle cap extraction presents a challenge in the manage-ment also, endoscopic treatment should be done quickly since metal bottle cap is quite large and sharp object. Here, we presented a very rare cause foreign body -a metal bottle cap- in the upper esophagus which was extracted using alligator jaw grasping forceps.
Influencia del endodermo en la diferenciación de las células precardiacas en agregación
Authors: García Díez Carmen , Villar Lacilla José María , Arias Fernández Montserrat
Published: December 2023

Se realiza un estudio de las características ultraestructurales de las células cardiogénicas de embrión de pollo en agregación, con el propósito de analizar la capacidad de diferenciación del mesodermo precardiaco en ausencia de endodermo. Los resultados obtenidos demuestran que los procesos de diferenciación cardiaca pueden iniciarse en ausencia de endodetmo. Sin embargo, el grado de diferenciación de los mioblastos cardiacos no alcanzan el nivel esperado de organización y complejidad miofibrilar
Cambios morfológicos del cuerpo lúteo durante el ciclo estral
Authors: José García Iglesias María , Escudero Díez Alfredo , María Bravo del Moral Ana , Manuel Martínez Rodríguez José
Published: December 2023

Se ha realizado un estudio de las modificaciones macro y microcópicas sufridas por el cuerpo lúteo de ciclo en la especia bovina. Para ello se estudiaron los cambios morfológicas del cuerpo lúteo de ciclo de 263 hembras sacrificadas en distintos mataderos de León. Efectuaremos la descripción macro y mricrocópica del cuerpo lúteo durante el ciclo estral dividido en cuatro periodos. Hemos comprobado que se puede establecer el momento de su evoucón basándonos en sus características macro y microscópicas.
Acción de un inhibidor de los opiáceos endógenos (Naloxone), administrado durante la lactación, sobre la actividad reproductiva en la rata
Authors: Fernández Celadilla Antonia , Montserrat Barberán Pelegrín María , Díez Monforte Carmen , Abad Gavín Miguel , Antonio Bascuas Asta José
Published: December 2023

Se estudia la acción de Naloxone, administrado siguiendo dos pautas distintas, sobre diversos parámetros reproductivos en la rata: producción láctea (basada en el peso corporal de las crías en el momento del destete), características ováricas (número de cuerpos lúteos y folículos) y niveles sericos de Progesterona en el destete. Asimismo se realza un estudio de las estructuras ováricas de las crías. No se observaron diferencias significativas en cuanto a la producción láctea o al número de Cuerpos lúteos en relación al grupo-control. La concentración sérica de progesterona fue significativamente superior en los grupos de hembras tratadas con naloxone. El número de folículos fue más alto en el grupo de control. Los ovarios de las crías presentaron una actividad menor en el grupo control.
Caracterización de la cecina de vacuno elaborada en la provincia de León
Authors: Domínguez Fernández de Tejerina Juan Carlos , Gutiérrez Fernández E. , Zumalacárregui Rodríguez José María
Published: December 2023

La composición de la cecina de vacuno elaborada en la Provincia de León es la siguiente: 52.44% de humedad; 9.93% de grasa sobre extracto seco (ES); 75.05% de proteina sobre ES; 19.93% de cenizas sobre ES; 15.01% de sal sobre ES; 0.42% de hidroxiprolina sobre ES; 0.44% de acidez titulable; 1820 rmg/100 g. de nitrógeno no proteico sobre ES; 865 mg/100 g de aminoácidos libres totales; 257 mg/100 g de péptidos totales sobre ES y 245 mg/100 g. de amoniaco sobre ES. La actividad de agua fue de 0.86 y el pH de 6.11.
Evolución de los principales grupos de microorganismos durante la elaboración y maduración del queso de Valdeteja
Authors: L. Gutiérrez M. , Bernardo Álvarez Ana , González Prieto Josefa , Martín Sarmiento Roberto , Javier Carballo García Francisco , Isabel Vidal González María
Published: December 2023

Se ha estudiado la evolución de la microflora en cuatro lotes de queso de cabra de Valdeteja, tomándose muestras de leche, cuajada (día 0, inmediatamente después del moldeado) y queso a los dos, cinco, diez, diecisiete y veintisiete días de maduración. Se siguieron las variaciones experimentadas por los siguientes grupos de microorganismos: flora aerobia mesófila (P.C.A.S.), flora aerobia psicrotrofa (PCAS), estreptococos lácticos (M-17), lactobacilos (Medio de Rogosa), leuconostoc (M.S.E.), micrococos (M.S.A.), enterobacteriáceas (V.R.B.G.A.), y mohos y levaduras (0.G.Y.E.A.). Se observó un predominio de las bacterias lácticas: los estreptococos lácticos y los leuconostocs alcanzaron valores de 10 9 u.f.c./g ya a los 0-2 días de maduración y los lactobacilos aumentaron hasta alcanzar cifras similares a los diecisiete días. Los recuentos en M.S.A. descendieron progresivamente, desde lo 4-10 -5 u,f.c./g en la cuajada, hasta alcanzar valores muy bajos a partir del décimo día. Las enterobacteriáceas pasaron de valores iniciales en tomo a lo 4-10 5 u.fc./g a lo 1-10 2 al final del proceso madurativo. Los mohos y levaduras (2-3 X lo 4 u.fc./g en la cuajada), aumentaron paulatinamente hasta obtenerse cifras de 2-4 x lo 6 U.f.c./g.
Evolución de los componentes nitrogenados durante la maduración del queso de Valdeteja
Authors: Rodríguez Tuero J.M. , Bernardo Álvarez Ana , González Prieto Josefa , Martín Sarmiento Roberto , María Fresno Baro José , Javier Carballo García Francisco
Published: December 2023

Se han estudiado las modificaciones que experimentan los principales componentes nitrogenados en cuatro partidas de queso de Valdeteja elaboradas por procedimientos artesanales. Todos los índices de degradación de los compuestos nitrogenados aumentaron en el transcurso de la maduración, aunque en una proporción relativamente baja, alcanzando valores finales medios en porcentaje sobre el nitrógeno total de: NST (9,9 + 1,0), NNP (4,82 + 0,76), N amínico (2,57 + 0,28) y N-NH3 (0,65 + 0,03). Estas cifras evidencian la escasa proteolisis que experimenta este tipo de queso, probablemente debido a los bajos valores de pH que se instauran en él desde el comienzo de la maduración.
Efecto sobre la adición de oxitocina al semen sobre la fertilidad y prolificidad en la inseminación artificial porcina
Authors: Peña Martín F. , Carlos Domínguez Fernández de Tejerina Juan , Anel Rodríguez Luis , Teresa Carbajo Rueda María
Published: December 2023

La adición de oxitocina (4 U.I.) al semen diluido produce un aumento significativo de la fertilidad (92,1 ± 4,4% vs 77,8 ± 7,01%) y de la prolificidad (10,74 ± 1,68 vs 9,82 ± 1,92) de los cerdos en los que la inseminación artificial es la práctica habitual.
Evolución de los aminoácidos libres durante la maduración del "chorizo"
Authors: Carlos Domínguez Fernández de Tejerina Juan , María Zumalacárregui Rodríguez José , Mateo Oyagüe Javier , Mercedes Aguirrezábal Moreno María
Published: December 2023

En el presente trabajo se ha estudiado la evolución de los aminoácidos libres a lo largo del proceso madurativo del chorizo elaborado en la provincia de León tanto de una manera artesanal como industrial. La mayoría de los aminoácidos libres siguieron un curso variable con apreciables oscilaciones. Solamente la Glutamina, Taurina y Asparagina sufrieron un importante descenso durante la maduración.
Dos métodos rápidos para la purificación de la L-Glicol deshidrogenasa (NAD+) de Enterobacter Aerogenes
Authors: Javier Carballo García Francisco , Martín Sarmiento Roberto , González Prieto Josefa , Bernardo Álvarez Ana , C. Rodríguez Salido J.
Published: December 2023

Se proponen dos nuevos procedimientos para la purificación de la L-glicol deshidrogenara (NAD+) de Enterobacter aerogenes. Ambos métodos dan preparaciones con un grado de pureza muy elevado (actividad específica en torno a 31,5-34 U.I./mg. de proteína), ofrecen un rendimiento muy alto (42-49% sobre la actividad inicial), no utilizan técnicas lesivas para la enzima y tienen también la ventaja de requerir tiempos de realización cortos (6-8 horas).
Efectos del dietilestilbestrol y zeranol sobre la estructura del epidídimo en la especie ovina
Authors: José García Iglesias María , Del Carmen Ferreras Estrada María , Manuel Martínez Rodríguez José , Pérez Martínez Claudia , Escudero Díez Alfredo , María Bravo del Moral Ana
Published: December 2023

Estudiamos las modificaciones microscópicas del epidídmo producidas tras la administración de DES y zeranol por distintas vías, en 38 corderos de raza Churra. Para el estudio histológico los epidídimos fueron examinados en tres segmentos: proximal, medio y distal. Con el zeranol observamos un menor diámetro del conducto, tapizado por un epitelio inmaduro sin estereocilios, sobre todo en los implantados. En el epitelio de los corderos tratados con DES, comprobamos vacuolización de las células principales, proliferación de las basales, así como la presencia de infiltrados leucocitarios que se acumulaban en la luz. Estos hallazgos fueron más señalados en el segmento distal. A este nivel, el DES inducía dilatación tubular y macroquistes, revestidos por un epitelio aplanado sin estereocilios. En el estroma, existía hiperplasia fibromuscular, más marcada en el segmento distal así como infiltrados de células mononucleadas, focales o difusos.
Modificaciones en la respuesta al calor de Bacillus cereus inducidas por la utilización de diferentes lotes del medio de recuperación
Authors: González Martínez Isaac , López Fernández Mercedes , Bernardo Álvarez Ana , Mazas Alberdi Margarita , González Prieto Josefa
Published: December 2023

Se investigó la influencia de varios lotes de Agar Nutritivo y de Medio de Recuento en Placa sobre la termorresistencia de dos cepas de Bacillus cereus (ATCC 4342 y 9818). La utilización de diferentes lotes de estos medios modificó considerablemente las tasas de recuperación, sin embargo los valores D aparentes no se vieron afectados en ningún caso. La adición de 50 y 100 ppm de calcio a los medios de sub-cultivo mejoró su efectividad, excepto en el caso de la cepa 9818 al suplementar el Agar Nutritivo con 100 ppm de calcio, que se tradujo en un descenso de los valores D aparentes.
Incremento del potencial cárnico de las reses vacunas mediante manipulación del estado hormonal regulador del crecimiento
Authors: Álvarez Nogal Pedro José
Published: December 2023

Se pasa revista en este artículo a distintas estrategias concebidas para estimular el crecimiento en las reses vacunas como forma de incrementar su potencial cárnico, basadas en la elevación de las ganancias diarias de peso y en la mejora de la conformación de la canal que provocan, al tiempo que hacen posible la redistribución de nutrientes hacia una mayor síntesis muscular y una menor formación de tejidos grasos. Con este fin se han aplicado una serie de técnicas entre las que destacan la administración de sustancias anabolizantes, los procedimientos de inmunoneutralización y la modificación del genoma animal mediante la transferencia de genes. De todas ellas se presentan los mecanismos a través de los cuáles surten dichos efectos, así como la situación de legalidad en que se encuentran actualmente en la Unión Europea.
Solvent/non-solvent treatment as a method for surface coating of poly(ε-caprolactone) 3D-printed scaffolds with hydroxyapatite
Authors: Bocharov V. S. , Dubinenko G. E. , Popkov D. A. , Popkov A. V. , Tverdokhlebov S. I.
Published: December 2023

Introduction Over the last decades numerous new materials and techniques for bone tissue engineering have been developed. The use of bioresorbable polymeric scaffolds is one of the most promising techniques for surgical management of bone defects. However, the lack of bioactive properties of biodegradable polymers restricts the area of their application for bone tissue engineering.

The aim of study was to apply solvent/non-solvent treatment to coat the surface of 3D-printed bioresorbable poly(ε-caprolactone) scaffolds with bioactive hydroxyapatite particles and report on the physicochemical properties of the resulting materials.

Material and Methods In the present study, biomimetic poly(ε-caprolactone) scaffolds were 3D-printed via fused deposition modeling technology and their surface was treated with the solvent/non-solvent method for coating with bioactive particles of hydroxyapatite.

Results It has been found that treatment in the mixture of toluene and ethanol is suitable for the coating of poly(ε-caprolactone) scaffolds with hydroxyapatite. The scaffolds maintain porous structure after treatment while hydroxyapatite particles form homogeneous coating. The amount of hydroxyapatite on the treated scaffolds was 5.7 ± 0.8 wt. %.

Discussion The proposed method ensures a homogeneous coating of outer and inner surfaces of the poly(ε-caprolactone) scaffolds with hydroxyapatite without a significant impact on the structure of a scaffold. Fourier-transform infrared spectroscopy confirmed that the solvent/non-solvent treatment has no effect on the chemical structure of PCL scaffolds.

Conclusion Coating of biomimetic 3D-printed PCL scaffolds with bioactive hydroxyapatite by the solvent/non-solvent treatment has been successfully carried out. Upon coating, scaffolds retained their shape and interconnected porous structure and adsorbed hydroxyapatite particles that were uniformly distributed on the surface of the scaffold.