bluuebunny/crossref_metadata_2025 huggingface dataset:
Global solution for a system of semilinear
diffusion-reaction equations with distinct diffusion coefficients
Authors: Böhm Michael , Ghosh Nibedita , Mahato Hari Shankar
Published: January 2025

In this paper, we show the existence of solution for a
relatively general system of semilinear parabolic equations with
nonlinear reaction rate terms and inflow-outflow boundary
conditions. Generally, to show the existence of global solution,
it has been seen in the literature that either mass conservation
or some growth condition on the source term is needed. Also, in
several recent works only the nonlinearity up to certain order or
of certain structure is allowed. However, our work considerably
weakens the ones previously made by several authors on the
coefficients of the elliptic operator, on the source (reaction
rate) terms as well as on the boundary conditions. Our proof is
also rather small and uses an argument based on implicit function
theorem.
Multiplicity of solutions for

p
(
x
)

$-curl systems arising in
electromagnetism
Authors: Gharehgazlouei Fariba , Afrouzi Ghasem
Published: January 2025

We are interested in the existence of multiple solutions
for a
class of

p
(
x
)

-curl systems arising in electromagnetism. We
work on variable
exponent Sobolev spaces and by using critical
point theory and the
variational method, we investigate the
existence of at least one,
two, and three solutions to the
problem.
Bazídiumos gombák termőtestfejlődésében szerepet játszó és biotechnológiai jelentőséggel bíró konzervált, annotálatlan gének azonosítása
Authors: Földi Csenge Anna
Published: January 2025

Jelen doktori munka során a termőtestfejlődés kezdeti és végső fejlődési lépéseit vizsgáltuk, különös tekintettel a konzervált, ismeretlen funkcióval bíró és annotálatlan génekre. Két különböző aspektusból vizsgáltuk meg a termőtestfejlődésben résztvevő géneket. Egyfelől megvizsgáltuk a feltehetően sejtfelszíni receptorokat kódoló, a termőtest iniciációja során felülexpresszált konzervált géneket, másfelől RNS-szekvenálással feltártuk a spóraképzés posztmeiotikus lépéseit. A háromból két prediktált 7-transzmembrán doménnel rendelkező fehérjét (p7TMP) kódológ gének deléciós mutánsai kifejezetten érdekes morfológiai elváltozásokat mutatott. Ezek közül a p7TMP79 deléciós mutáns törzs a szakirodalomban eddig le nem írt morfológiai jellegekkel rendelkező termőtesteket hozott létre. A fehér, szférikus primordiumokban a differenciáció szinte teljes egészében elmaradt. A deléciós mutáns hógolyó-szerű fenotípusa miatt a kiütött gént az angol snowball (hógolyó) után snb1-nek neveztük el. A Δsnb1 törzs belső szövetekkel nem rendelkező termőtestei lehetővé tették a szöveti differenciációban résztvevő gének azonosítását. Filogenetikai vizsgálatok alapján az SNB1 ortocsoport egy eddig nem ismert, új géncsaládot alkot. Korábbi, a sporulációval kapcsolatos kutatások elsősorban a haploid magokat létrehozó meiózis lépéseit vizsgálták. Kutatásunk során célunk volt a spóraképzés meiotikus lépései mellett a posztmeiotikus folyamatok jellemzése is. A transzkriptomikai analízis ezen folyamatok feltárásán túl alkalmasnak bizonyult olyan génjelöltek azonosítására, amik deléciójával a spóraképzés elakadhat, így értékes forrása lehet ipari spóramentes gombatörzsek fejlesztésére is. Három konzervált, annotálatlan vagy funkcionálisan kevésbé ismert gént ütöttünk ki Coprinopsis cinerea-ban, amik deléciójával spóraszegény és teljesen spóramentes törzseket tudtunk előállítani, amik nem szenvedtek más, látható morfológiai defektusoktól.
Road building using wood ash
Authors: Dimter Sanja , Kuburić Goran , Ević Ernest , Vrhovac Goran
Published: January 2025

This paper describes the specifics of constructing a test section of an internal road where wood ash was used to improve the bearing capacity of the subgrade and to construct the base layer of the pavement structure. Laboratory testing and field control testing were conducted during the construction. The results showed that the increase in the bearing capacity of the subgrade by applying stabilization with wood ash ranges from 155 to 235 % compared to the natural clay subgrade. Due to the binding properties of wood ash, the bearing capacity of the subgrade continues to increase even after construction, with an observed increase of 31 to 39 % in bearing capacity within 14 days of construction. The base layer made of wood ash of different fractions achieved compressive modulus Ms = 60 to 80 MN/m², thus meeting the bearing capacity criteria. The experiences from the test section confirm the potential of wood ash for use in improving subgrade bearing capacity and in the construction of the base layer of pavement structures. This could encourage more rational and economical design and construction of pavement structures, especially in areas with large amounts of waste ash from wood biomass, such as the region of Slavonia.
„A hatásosságát kellene tudni ezeknek a pénzeknek tisztességesen mérni” – Interjú dr. Baráth Etelével, a Magyar Közgazdasági Társaság (MKT) Fejlesztéspolitikai Szakosztályának elnökével, korábbi európai ügyekért felelős tárca nélküli miniszterrel
Authors: Baráth Etele , Trautmann László
Published: January 2025

Baráth Etelét az Európai Unió kohéziós politikájának történetéről és hazai megvalósításáról
kérdeztük. Az interjúban elhangzik, hogy a versenyképességet és a hatékonyságot az EU
nem mindig tudta összeegyeztetni a felzárkóztatási programok során. Baráth Etele azt is
elmondta, hogy a biztonságpolitikai szempontok jelen vannak a területfejlesztési elképze-
lésekben. Kiemelte, hogy hosszú távú tervezési, stratégiai elképzelések nélkül nem lehet
sikeres területfejlesztést megvalósítani, amihez jól működő, gyakorlott tervezési appará-
tusra van szükség.
Területi különbségek az Európai Unió kohéziós politikájában
Authors: Horváth Anna
Published: January 2025

Nils Redeker, Daniel Bischof és Valentin Lang „Fixing Cohesion – How to Refocus Regional
Policies in the EU”1 című tanulmánya az Európai Unió kohéziós politikájának hatékonyságát
vizsgálja meg a bérek területi eloszlásán keresztül. A kohéziós politika pénzügyi eszköze
az európai költségvetés egyik legnagyobb és politikailag legfontosabb tétele, célja a gazda-
sági, társadalmi és területi kohézió erősítése a különböző fejlettségi szinteken lévő régiók
közötti gazdasági egyenlőtlenségek csökkentése révén.
Lignosulfonamides as a new group halogen free flame retardant for PLA
Authors: Majka Tomasz , Zawadzka Zuzanna , Piech Radosław
Published: January 2025

Dibutyl-lignosulfonamide (DBA), N-butyl-N-dodecyl-lignosulfonamide (NNA) and didodecyl-lignosulfonamide (DDA) were used as halogen-free flame retardants (HFFR) of PLA. Lignosulfonamides were used in amounts of 3, 6 and 9 wt%. The composites were analyzed by TGA, DSC and micro-combustion calorimetry (MCC). Lignosulfonamides were shown to reduce PLA flammability by up to 40%. The lowest flammability was obtained with the highest HFFR content. The reduction in flammability can be explained by the release of SO2 at the early stage of biocomposite decomposition, which promotes the formation of coke and char, acting as a local insulator.
Revisando la relación entre gobernanza del proyecto y éxito del proyecto: El papel moderador de la gestión del proyecto sostenible y el compromiso de los stakeholders
Authors: Durango Yepes Carlos Mario , Díaz Pelaez Alejandro
Published: January 2025

Este artículo tiene como propósito discutir teóricamente la relación gestión de proyectos y éxito en los proyectos mediada por la gestión sostenible de proyectos y el compromiso de los grupos de interés, debido a la poca exploración que ha tenido en la literatura sobre gerencia de proyectos. Esta discusión se realiza alrededor de los hallazgos investigativos relacionados con estos cuatro constructos, a partir de los cuales se argumenta que la escuela de la sostenibilidad en gestión de proyectos permite la renovación del campo de la gerencia de proyectos. La literatura previa sobre la relación entre la gobernanza del proyecto y éxito del proyecto tiene hallazgos contradictorios. Estos hallazgos denotan una brecha para examinar los efectos de moderación de las prácticas de gestión de proyectos sostenibles y el compromiso de los stakeholders. De acuerdo con los antecedentes estudiados, se puede argumentar que existe una falta de comprensión en la literatura existente relacionada con la gobernanza del proyecto y el éxito del proyecto. Por tanto, en este artículo se expone la influencia del compromiso de los grupos de interés y de las prácticas de gestión de proyectos sostenibles en la relación entre gobernanza del proyecto y éxito del proyecto. Finalmente, se ofrecen algunas implicaciones teóricas, empíricas y prácticas.
Dinámicas financieras en las AFP: Explorando las relaciones entre afiliados activos y ratios financieros (2014-2022)
Authors: Vilchez Olivares Percy , Vergara Moncada Raúl Jesús , Guzmán Chumpitaz Ramos Domingo
Published: January 2025

Esta investigación se propuso examinar detenidamente la información financiera de las Administradoras de Fondos de Pensiones (AFP) con el objetivo central de entender la relación entre el número de afiliados activos y diversos ratios financieros durante el periodo 2014-2022. Utilizando el método estadístico de la correlación de Pearson, así como un análisis detallado de los afiliados activos, utilidad neta y patrimonio de las AFP, se revelaron relaciones diversas entre el número de afiliados activos y los indicadores financieros. Los resultados también señalaron variabilidades significativas en el crecimiento y disminución de afiliados activos, utilidad neta y patrimonio en cada AFP. En conclusión, se observaron pocas relaciones notables, tanto positivas como negativas, entre el número de afiliados activos y varios indicadores financieros, como los ratios de liquidez, solvencia, gestión y rentabilidad. Este estudio proporciona una visión integral de las dinámicas financieras en las AFP,
contribuyendo a una comprensión más profunda de la compleja interacción entre la membresía activa y la salud financiera de estas entidades.
Redescription of Cryptophlebia ombrodelta (Lower, 1898) (Lepidoptera, Totricidae) an emerging pest of leguminous medicinal plants with new host record from India
Authors: Mallick A S , Narayanasamy C , Palanisamy S R , Thiyagarajan E , Natarajan D , Hnialum M , Manickam V
Published: January 2025

Cryptophlebia ombrodelta (Lower, 1898) (Olethreutinae: Tortricidae: Lepidoptera) larvae were recorded for the first time from the fruits of Saraca asoca (Roxb.) Willd. (Fabaceae) a culturally and medicinally important tree at Thiruvananthapuram, Kerala, India. The larvae were reared to the adult stage at Butterfly House, Tamil Nadu Agricultural University Insect Museum. Pupae and adults of C. ombrodelta are described in detail. The pupal morphology is described for the first time. Adults are redescribed in detail and special emphasis is given on Male and Female genital morphology. Mitochondrial DNA was extracted from adult specimens, DNA sequence was compared with other related sequences on the NCBI database for additional confirmation. A phylogenetic tree was constructed using sequences submitted worldwide which show more than 98% similarity.
A regularity result for incompressible elastodynamics equations in the ALE coordinates
Authors: Xie Binqiang
Published: January 2025

We consider incompressible inviscid elastodynamics equations with a free surface and establish regularity of solutions for these equations. Compared with previous result on this free boundary problem [X. Gu and F. Wang, Well-posedness of the free boundary problem in incompressible elastodynamic under the mixed type stability condition, J. Math. Anal. Appl., 482, (2020), 123529] in space H
3, we are able to establish regularity in space H
2.5+δ
upon the Arbitrary Lagrangian-Eulerian (ALE) coordinates. It is achieved by reformulating the system into a new formulation with the ALE coordinates, presenting uniform estimates for the pressure, tangential estimates for the system, as well as curl and divergence estimates.
Seismic response and damage model analysis of rocky slopes with weak interlayers
Authors: Zhao Yawen , Dong Jinyu , Liu Handong , Wang Chuang
Published: January 2025

A large-scale shaking table test of an anti-dip rock slope with a weak interlayer is conducted based on the Hongshiyan landslide induced by the Ludian earthquake. The dynamic failure mode energy damage identification method is analyzed using the Hilbert–Huang transformation and marginal spectrum theory. The result shows that the weak interlayer under horizontal loading amplifies the 5–10 and 25–30 Hz frequency signal and attenuates the 15–20 Hz signal. Within the hard rock, it amplifies the 5–15 Hz frequency signal and attenuates the 20–30 Hz signal. Under vertical loading, both weak interlayer and hard rock have an amplification effect on 5–30 Hz signal, and the amplification effect of weak interlayer is more significant. The horizontal seismic wave slope damage process can be divided into two stages: internal damage and obvious failure. When the horizontal seismic input amplitude reaches 0.2–0.3 g, internal damage occurs in the slope. The slope damage is primarily concentrated below two-third of the hard rock height and primarily in the shallow and surface regions of the slope. An input amplitude in the range of 0.4–0.5 g corresponds to the obvious failure stage. At this time, the slope first undergoes an obvious rupture in the rock above the weak layer; this rupture then extends upward to the top of the slope. Marginal spectral analysis results are consistent with the field model slope macroscopic rupture phenomenon.
Development and validation of headspace gas chromatography with a flame ionization detector method for the determination of ethanol in the vitreous humor
Authors: Mihajlović Filip , Andrić Ivana , Slović Živana , Vujović Maja , Piskulić Kristina , Đorđević Snežana
Published: January 2025

Introduction

Qualitative and quantitative testing of ethanol in post-mortem samples is an important analytical procedure that provides accurate, precise, and reliable results. Given the complexity of the issue, obtaining a realistic picture of lifelong alcoholemia requires supporting blood ethanol findings with analyses of alternative samples, primarily vitreous humor (VH).

Objective

The objective of this study was to develop and validate a headspace gas chromatography with flame ionization detection (HS/GC-FID) method for determining ethanol concentration in VH.

Materials and methods

Conditions for the HS/GC-FID method were established and the method was validated according to the guidelines of the European Medicines Agency. Validation parameters such as precision, accuracy, specificity, sensitivity, and linearity over a wide concentration range were evaluated through statistical analysis.

Results

The method demonstrated precision, accuracy, specificity, and sensitivity. Additionally, it proved to be linear across a wide concentration range and relatively fast, making it suitable for rapid and routine determination of ethanol concentration in VH, particularly for forensic applications.

Conclusion

Results from validation and application of the method to VH samples indicate that ethanol concentration in VH can be reliably determined using the presented HS/GC-FID method, making it a valuable tool in forensic investigations.
Effects of Movement Sonification Auditory Feedback on Repetitions and Brain Activity During the Bench Press
Authors: Garner Collin , Nachtegall Aubrey , Roth Edward , Sterenberg Alycia , Kim Daekyoo , Michael Timothy , Lee Sangwoo
Published: January 2025

Garner, C, Nachtegall, A, Roth, E, Sterenberg, A, Kim, D, Michael, T, and Lee, S. Effects of movement sonification auditory feedback on repetitions and brain activity during the bench press. J Strength Cond Res XX(X): 000–000, 2024—Auditory stimulation and feedback have been found to enhance aspects of motor performance such as motor learning, sense of agency, and movement execution. While music is the most common form of auditory stimulation during exercise, movement sonification (MoSo) may better facilitate motor performance through its use of music elements representing dynamic movements. Despite evidence of MoSo's benefits to motor performance, little is known about MoSo's influence on resistance exercise. The purpose of this research was to investigate the effects of MoSo auditory feedback on repetitions and brain activity during bench press. Twenty men performed bench press to failure in 3 sound conditions (no-sound, self-selected music, and MoSo). Repetition maximum (RM) was measured, and brain activity was analyzed using beta power spectral density (PSD) and frontal alpha asymmetry (FAA). A 1-way repeated measures analysis of variance (ANOVA) was conducted to compare data across sound conditions. To gain a deeper understanding of brain activity during bench press, a 2-way repeated measures ANOVA was performed to investigate changes in beta PSD and FAA over time using sound and timepoint as independent variables. A 1-way ANOVA showed that FAA in MoSo was significantly higher than in music and no-sound; however, no statistically significant differences were observed in RM and beta PSD between conditions. A 2-way ANOVA revealed that beta PSD and FAA increased significantly as bench press repetitions approached failure. Our study suggests that MoSo auditory feedback may not improve bench press repetitions, but it may increase brain activity during bench press better than listening to music.
Different External Cues Elicit Specific Kinetic Strategies During a Drop Jump in Well-Trained Adolescent Soccer Players
Authors: Barillas Saldiam R. , Lloyd Rhodri S. , Pedley Jason S. , Oliver Jon L.
Published: January 2025

Barillas, SR, Lloyd, RS, Pedley, JS, and Oliver, JL. Different external cues elicit specific kinetic strategies during a drop jump in well-trained adolescent soccer players. J Strength Cond Res XX(X): 000–000, 2024—The purpose of this study was to examine how different external cues that focus on jump height and ground contact time influence kinetic outcomes from a drop jump (DJ) in well-trained young soccer players. Following familiarization, 21 adolescent male soccer players performed 2 DJ trials under 4 different cue conditions: a height cue instructed subjects to jump to the ceiling, a ground contact cue instructed subjects to get off the ground as fast as possible, a combined condition joined both cues together, whereas a neutral cue with no external focus was used as a control condition. The height and contact time cues elicited specific kinetic responses that were significantly different to other conditions (p < 0.05); the height cue increasing impulses (d = 1.17–1.21) and jump height (d = 0.68), with the contact cue shortening ground contact time (GCT) (d = 1.27), increasing vertical stiffness (d = 1.48) and increasing force (d = 1.20–1.36). When combining the height and contact cue, a combination of significant (p < 0.05) kinetic responses were also observed, albeit to a lesser effect. Specifically, the combined cue increased impulse (d = 0.71–0.76) and jump height (d = 0.57) compared with a contact cue and a height cue, increased reactive strength index (d = 0.34), force (d = 0.69–0.83), and vertical stiffness (d = 0.75) while also reducing GCT (d = 0.69). Practitioners working with well-trained adolescent soccer players can use different external cues to effectively influence the kinetic strategies employed during a DJ.
Exploring the Relationship Between Diverse Strength Qualities and Endurance Running Performance Across Different Intensities in Recreational Men and Women Runners
Authors: Ruiz-Alias Santiago A. , Marcos-Blanco Aitor , Fernández-Navarrete Iván , García-Pinillos Felipe , Pérez-Castilla Alejandro
Published: January 2025

Ruiz-Alias, SA, Marcos-Blanco, A, Fernández-Navarrete, I, García-Pinillos, F, and Pérez-Castilla, A. Exploring the relationship between diverse strength qualities and endurance running performance across different intensities in recreational men and women runners. J Strength Cond Res XX(X): 000–000, 2024—This study examined the relationship between different strength qualities and running performance at different intensities in recreational runners. Eleven men (maximal oxygen uptake [

o
2max]: 55.6 ± 4.1 ml·kg−1·min−2) and 10 women (

o
2max: 53.8 ± 5.0 ml·kg−1·min−2) were tested on 4 occasions. In the first session, each strength quality was tested through the isometric midthigh pull (peak force, rate of force development), drop jump (reactive strength index), horizontal (theoretical maximal force [F
0], theoretical maximal horizontal velocity, maximal power output [Pmax]) and vertical (theoretical maximal load [L
0], theoretical maximal vertical velocity [v
0V
], area under the load-velocity profile [A

line
]) profiles, and vertical force-velocity and load-velocity profiles. In the second session, the

o
2max was determined to control its influence on the relationship between the strength qualities and running performance. In the third and fourth testing sessions, their running performance at a 10-km distance and at 2 time trials of 9 and 3 minutes were determined. Partial correlations revealed that the 10 km did not significantly correlate with any strength quality, 9 minutes with L
0 (r = −0.474, p = 0.035) and A

line
(r = −0.457, p = 0.043), and 3 minutes with L
0 (r = −0.644, p = 0.002), A

line
(r = −0.485, p = 0.030), v
0V
(r = 0.756, p < 0.001), F
0, (r = 0.700, p = 0.001), and Pmax (r = 0.579; p = 0.009). These correlations facilitated the differentiation of running performance between sexes, highlighting also unique strength qualities within each group.
Output-Only Damage-Detection Method for Concrete Frame Structure Using the Phase Space Reconstruction Method
Authors: Zhang Guangcai , Zhao Wenlong , Zhou Zhenwei , Wan Chunfeng , Feng Kun , Xie Liyu , Xue Songtao
Published: January 2025

Vibration-based techniques for structural health monitoring have garnered increasing attention in recent years, particularly in the context of numerous existing concrete frame structures. However, the detection of minor damages remains a challenging endeavor. Diverging from conventional methods reliant on time, frequency, or time-frequency domains for identification, this study proposes and evaluates an output-only phase space–based algorithms for structural damage detection, which involves reconstructing the dynamic system in phase space. Key to this approach is the introduction of the attractor distance, which is derived from attractor geometry, as a defining feature. Although impact force or ambient vibration typically serve as external excitations, this study employs chaotic excitation to induce vibrations in structures. Numerical and experimental investigations are conducted to assess the efficacy of the proposed phase space reconstruction method in detecting damage. A frame structure modeled as a lumped mass model is simulated and analyzed, exploring various degrees of damage and their effects on identification results. Furthermore, the influence of delay time and Gaussian distributed noise on damage-detection results is scrutinized. Validation experiments on a four-story frame structure subjected to chaotic excitation confirm the utility of the reconstructed attractor for damage detection, particularly in scenarios involving minor damage, with an approximately 5 % reduction in stiffness. The findings suggest that combining trajectory analysis with attractor distance facilitates efficient diagnosis of minor damage. The proposed methodology holds promise for damage identification in more intricate and large-scale concrete frame structures.
Przynależność generacyjna bibliotekarzy jako czynnik determinujący postawę wobec pracy
Authors:   Biblioteka Główna Uniwersytetu Szczecińskiego, Stawińska Danuta
Published: January 2025

The labor market in Poland is undergoing constant transformation due to demographic changes, mainly resulting from the aging of the population. Attitude towards work is shaped, among other things, by generational affiliation, and the need to continuing education or even retraining applies to employees of every generation. Developing attitudes, personal qualities, value system and motivation, increases employee’s value on the labor market and influences professional activity. For organization such as a scientific library, age management involves resolving conflicts related to having employees of different age groups. The task is difficult, because even within a single generation there is a huge diversity of views, behavior, and attitudes. Breaking down intergenerational barriers, however, becomes an opportunity for any organization. The purpose of this article is to highlight the issue of the small age diversity of college library employees. Based on the analysis of selected literature, an attempt was also made to systematize the knowledge of management of generational diversity.
Bibliotekarz funkcyjny. Profilowanie zawodu bibliotekarza w obliczu wyzwań współczesności
Authors:   Biblioteka Politechniki Gdańskiej, Hodyl Dorota
Published: January 2025

The systems librarian, subject librarian, culture animator, data librarian, data steward… Digitization of libraries, transformation of their users expectations, and evolution of functions performed by libraries resulted in significant changes in the profession of a librarian. Traditional division of librarians into employees of the circulation sections, cataloguing and classification sections, or – following a different classification – teachers librarians, librarians as employees of public or scientific institutions, has been significantly modified and enriched with new professions. The aim of this article is to review the nomenclature of librarian job positions using selected examples, with particular emphasis on research and public libraries. The diversity of nomenclature within the profession demonstrates the transformation that modern librarianship has undergone – and is still undergoing.
Biblioteka zmienną jest. Transformacja działalności Biblioteki Uniwersytetu Łódzkiego
Authors:   Biblioteka Uniwersytetu Łódzkiego, Mikołajuk Lidia
Published: January 2025

This article discusses various aspects of the academic library’s operations and how despite technological advancements, their main functions have remained the same. The youngest generation of users requires librarians to follow new trends in sharing collections and information literacy. The speed of changes has impacted the librarian profession, leading to a shift in their responsibilities and organizational structure within library. The space of the university library is also experiencing a transformation to meet the needs of all groups of readers.
From Valletta to Faro: Archaeological Heritage and Communities
Authors: Poškienė Justina
Published: January 2025

The article discusses the changing trends in archaeological heritage conservation – from expertise-based heritage protection to the “democratisation of heritage”. This process is well represented by the Amersfoort Agenda, adopted by the The Europae Archaeologiae Consilium (EAC) in 2014, which seeks to integrate the principles of the Faro Convention into the practice of archaeological heritage protection developed by the Valletta Convention. More generalised heritage conservation processes and changes in public administration policies that promote participatory (interactive) governance also contribute to a stronger role for society in decision-making. It is in this aspect – the relationship between archaeology and society – that the paper presents contemporary trends in archaeological heritage conservation, as well as insights into local communities’ attitudes towards archaeological heritage in Lithuania.
Bogotá entre inflexiones y polémicas ciudadanas: Panoramas de la ciudad desde mediados del siglo XX
Authors: Ramírez Nieto Jorge
Published: January 2025

En la historia urbana de Bogotá, durante la segunda mitad del siglo XX y lo transcurrido del siglo XXI, identificamos una serie discontinua de puntos de inflexión marcados por polémicas públicas que genera polarización del ambiente social. Estas polémicas (políticas, ideológicas, intelectuales, técnicas, sociales, etc.) impactan la percepción del ambiente urbano y sus habitantes y dejan huellas tangibles, que se evidencian en discursos sociales en los medios locales de comunicación, con diversas corrientes discursivas, fracturas y matices ideológicos. Este artículo estudia estas polémicas a través de narraciones referidas a sucesos que afectaron la trama de la historia urbana de Bogotá.
El órgano en Boyacá (Colombia central) a finales del siglo XIX
Authors: Castillo Higuera José Luis
Published: January 2025

Los órganos históricos son testimonio de las prácticas musicales en las iglesias de Boyacá (Colombia central) a finales de siglo XIX. La iglesia católica desempeñó un papel importante en el tumultuoso proceso de formación del estado colombiano, desde su apoyo a la campañalibertadora, sus disputas con los gobiernos Liberales y el establecimiento del Concordato de 1887. A pesar de las precariedades, por antigua prescripción, las iglesias de Boyacá tuvieron órganos de tracción mecánica construidos por organeros de la región. Estos instrumentos presentanevidentes trazas de la tradición de organería colonial y el principal de sus constructores fue Ceferino Cavieles, quien residió en Cerinza. El presente trabajo presenta un panorama y análisis organológico de los órganos históricos (emplazados o desmantelados) encontrados hoy en Boyacá.
Microencapsulación de extractos apolares de propóleos mediante secado por aspersión
Authors: Piedrahíta marquez David Guillermo , Camargo Ovalle Lady Viviana , Maraschin Marcelo , Vásquez Mejía Sandra Milena , Suárez Mahecha Héctor
Published: January 2025

Los extractos oleosos de propóleos se han caracterizado por ser matrices con un alto poder antirradical, reductor y antimicrobiano. Sin embargo, debido a su susceptibilidad a los agentes oxidantes (Oxigeno y luz) que reaccionan con el medio ambiente y afectan negativamente su bioactividad y propiedades sensoriales han limitado su uso. Para preservar la protección de los principios activos y permitir la liberación controlada de sus componentes bioactivos, se evaluó la microencapsulación de extracto oleoso de propóleos proveniente del bosque húmedo premontano colombiano (EOPC) por medio de secado por aspersión (Spray Drying). Para tal fin fueron utilizados como materiales de pared maltodextrina y goma arábiga. Los EOPC microencapsulados (EOPCM) fueron analizados mediante análisis fisicoquímicos y microbiológicos. Los resultados indican que los EOPCM presentaron un alto potencial antioxidante, antiradical y antimicrobiano y las formulaciones con mayor concentración de EOPC y menor temperatura de secado tuvieron mayor bioactividad debido a una menor degradación de metabolitos y a la menor producción de sustancias pro-oxidantes. Se concluye que es posible elaborar EOPCM usando mezclas de maltodextrina y goma arábiga y se conserva más del 50% de los fenoles y carotenoides en la muestra del EOPC.
The growth and yield of cocoyam (Colocasia esculenta (L.) Schott) as affected by storage methods
Authors: Akinrinola Tajudeen Bamidele , Tijani-Eniola Hassan
Published: January 2025

Cocoyam (taro) (Colocasia esculenta) is an important tropical crop that requires minimal inputs compared to yam. However, increasing its production to meet the growing population’s food demand is hindered by the susceptibility of planting materials to rotting in the field before the next season. While reports on storage conditions for cocoyam cormels are available, information on the storage of corms (propagules) remains limited. Hence, this study assessed simple storage methods and the field performances of corms stored under these methods at the Ayepe research field of the University of Ibadan, Ibadan, Nigeria in 2019. Corms stored under shade, in pits, and on raised platforms were evaluated in a completely randomized design with three replicates. On the field, freshly harvested corms (S1), corms stored under shade (S2), corms stored in pits (S3) and corms stored on raised platforms (S4) were evaluated in a randomized complete block design with three replicates. The results indicated that weight loss and storage efficacy differed significantly (P<0.05) among the storage conditions. Weight loss ranged from 8.95 (S2) to 29.87% (S4), while storage efficacy ranged from 71.20 (S4) to 91.20% (S2). Corm emergence was significantly higher in S2 compared to S4 at 2 and 4 weeks after planting but was similar to the other treatments. Propagule storage conditions had no significant influence on cocoyam growth and yield. However, cormel yields for S1, S2, S3 and S4 were 7,483, 6,625, 6,729 and 6,208 kg h-1, respectively. Corms stored under shade or in pits were, therefore, recommended.
Influence of plant density on fruit and foliar nutritional composition for Hass avocado in Colombia
Authors: Córdoba-Gaona Oscar de Jesús , Bedoya-Ramírez Sara Isabel , Loaiza-Ruiz Ruby Alejandra , Barrera-Sánchez Carlos Felipe , Cano-Gallego Lucas Esteban
Published: January 2025

This study aimed to determine the effect of plant density on avocado fruit and leaf nutritional composition in commercial orchard cv. Hass in the department of Antioquia, Colombia. The experimental design was a randomized complete block with three replicates. The treatments consisted of six plant densities (204, 278, 333, 400, 625, and 816 tree ha-1), and each experimental unit consisted of six 9-year-old trees. The 333 and 400 trees ha-1 plant densities presented the highest leaf concentrations of N, P, Ca, Mg, S, Zn, and B and fruits’ lowest saturated fatty acid contents. The nutritional balance index for N, Ca, Mg, S, Fe, Mn, Zn, and B was significantly affected by plant densities. The plant density significantly does not affect K, Ca, S, and Fe concentration in fruits, and the percentage of avocado fruits by size showed no significant differences due to plant distances.
Effect of hydrothermal processing on the native starches of cassava (Manihot esculenta) and yam (Dioscorea alata)
Authors: Acevedo-Viloria Nedys , Figueroa-Flórez Jorge , Salcedo-Mendoza Jairo , Hernández-Ruydiaz Jorge , Ortega-Quintana Fabian
Published: January 2025

Currently, there is a need to develop starches with improved properties to enhance their applicability in food matrices. The effect of the hydrothermal treatment (HMT) on the physicochemical, morphological, and structural properties of native cassava and yam starches was evaluated. Native cassava and yam starches were subjected to low moisture (20 - 25%), a high temperature (90 °C), and a processing time of 4 hours. The results showed that HMT significantly decreased in cold water solubility (CWS), in cassava starch while increasing its water absorption capacity (WAC) and degree of crystallinity (DC). In contrast, yam starch displayed the opposite effects. Furthermore, the modification increased amylose content and paste stability. Additionally, microphotography revealed significant changes in granular morphology. In conclusion, hydrothermal treatment of tuber starches is a promising technology for improving the hydrophilic properties and pasting characteristics of cassava and yam starches, supporting the development of clean-label products.
Efecto de la asociación repollo, lechuga, perejil y acelga sobre la incidencia de malezas y el rendimiento del repollo
Authors: Sánchez Gonzalez Marcos Antonio , Benítez Del Padre Nidia Adriana , Ruiz Díaz Lovera Edith Diana María , Caballero Casuriaga Oscar Luis
Published: January 2025

El presente trabajo tuvo como objetivo evaluar el efecto de la asociación de repollo, lechuga, perejil y acelga sobre la ocurrencia de malezas y parámetros de rendimiento del repollo. La investigación se realizó en el campus de la Facultad de Ciencias Agrarias de la Universidad de Concepción, Paraguay. Los tratamientos utilizados fueron repollo (T1), repollo+lechuga (T2), repollo+acelga (T3) y repollo+perejil (T4). El diseño utilizado fue el de parcelas subdivididas con cuatro tratamientos y seis repeticiones, totalizando 24 Unidades Experimentales (UE). Las determinaciones evaluadas fueron porcentaje de incidencia de malezas, rendimiento del repollo (ton ha-1) y diámetro ecuatorial y polar de la cabeza (cm). Estos valores fueron sometidos a un análisis de la varianza (ANOVA) y, cuando se encontraron diferencias significativas entre los tratamientos, la comparación de medias se realizó mediante la prueba de Tukey al 5%. No se registraron diferencias significativas para el rendimiento del repollo, el diámetro ecuatorial y polar (P>0,05). Se concluye que las especies vegetales utilizadas en este estudio en consorcio con el repollo influyeron positivamente en la reducción de la incidencia de la maleza y en el aumento del rendimiento del repollo, pero no afectaron significativamente a los diámetros ecuatorial y polar del repollo.
Functional characteristics and antimicrobial activity of supercritical CO2 extracts from passion fruit (Passiflora edulis) seeds
Authors: Barriga-Sánchez Maritza , Varas Condori Miguel Angel , Sanchez-Gonzales Gloria , Céspedes Chombo Roxana
Published: January 2025

The passion fruit seed is an important byproduct of the agroindustry, as it accounts for 15% of this fruit, so it is imperative to add value to these seeds. In this context, the present study aimed to evaluate the functional characteristics and antimicrobial activity of passion fruit seeds. Oil extraction was carried out using supercritical CO2 (SC-CO2) and supercritical CO2 with ethanol cosolvent (SCCO2+et); both oils showed a similar fatty acid profile with a high content of polyunsaturated fatty acids (71.62 and 71.80%, respectively). The study of the functional quality of the oils showed low atherogenicity (AI) and thrombogenicity (TI) indices. The seed flour oil and the defatted passion fruit seed flour extract presented antimicrobial activity against Klebsiella oxytoca, Staphylococcus aureus and Proteus vulgaris. The ethanolic extract of flour defatted with CO2+ethanol (FDCE) obtained higher values of total phenolic compounds and antioxidant capacity by ABTS and FRAP. The present research provides the characterization of the functional properties of the passion fruit seed oils and the defatted seed, being data of interest for future applications of the passion fruit seed.
Teorizar haciendo: Pedagogías Experimentales en la Enseñanza de la Teoría de la Arquitectura
Authors: Montes Ruiz Ana Paula , Barriendos Joaquín , Rodríguez Ismael , Altamirano Gama Santiago , Díaz Caicedo Isabel Carolina , Elorza Galindo Itzyri Paola , Joya Ornelas Hilda Michelle , Osorio Córdova Leonela Fernanda
Published: January 2025

Existe un amplio consenso sobre la relevancia que tiene la teoría para la conceptualización y la práctica contemporánea de la arquitectura. Sin embargo, los fundamentos teóricos de la arquitectura carecen, en la actualidad, de un lugar bien definido dentro del currículo académico de la profesión, en particular a nivel licenciatura. En la mayoría de los casos, la teoría arquitectónica se enseña a través de cursos aislados u optativos, lo cual imposibilita su integración dentro de los talleres y la práctica del diseño arquitectónico. Para contrarrestar esta situación, se considera necesario construir metodologías de enseñanza que expandan el learning by doing (John Dewey) y lo conviertan en un theorizing (architecture) by doing (artistic spatial practices). Este artículo analiza la implementación de un modelo de pedagogía experimental basado en el teorizar haciendo, el cual fue implementado en un curso de licenciatura del Instituto Tecnológico de Monterrey (ITESM). Entre los hallazgos se ofrece un marco teórico para la enseñanza de la arquitectura moderna de América Latina y una reflexión sobre el uso de la antropofagia brasileña como teoría-en-acción sobre el futuro de la enseñanza de la arquitectura.
Impact of intraoperative assessment of renal allograft arterial blood flow on vascular complications and their prevention strategies
Authors: Zharikov A. A. , Bankeev D. A. , Kurbangulov I. R. , Kukovyakin D. V. , Karapityan A. R. , Petryaev M. A. , Kartashev A. A. , Porchkhidze Z. A. , Saydulaev D. A.
Published: January 2025

Objective: to use intraoperative fluorometry to assess the impact of renal allograft arterial blood flow on vascular complications.

Materials and methods. The study included 285 patients who underwent kidney transplantation (KT) at Shumakov National Medical Research Center of Transplantology and Artificial Organs (from May 2022 to July 2023). Patients were distributed into 2 comparison groups. Group 1 (49 patients, 17.2%) underwent intraoperative flowmetry, while group 2 (236 patients, 82.8%) did not. Following graft reperfusion, renal transplant arterial blood flow was measured in real time. Next, ureteroneocystostomy was performed, and then the graft was placed in the iliac fossa in its optimal position and the measurement was repeated.

Results. Intraoperative vascular complications occurred in 6 patients (12.2%) in the intraoperative flowmetry group. Those with vascular complications exhibited statistically significantly lower renal arterial volumetric blood flow (VBF) rate immediately after reperfusion (94 ± 93 vs. 291 ± 147; p = 0.002) and after reassessment at the end of ureteroneocystostomy (160 ± 88 vs. 349 ± 157; p = 0.006). A VBF of less than 120 mL/min contributed to the intraoperative decision to immediately revise the anastomosis. Following revision and reanastomosis of the arterial channel, there was no significant difference in VBF rate and PI values between recipients with the complications and the group without.

Conclusion. Prophylactic application of intraoperative fluorometry in KT allows to obtain objective data about the quality of vascular anastomosis and timely prevent irreversible vascular complications, thus preserving the renal graft in the postoperative period.
Biodegradable silk-based products for regenerative medicine
Authors: Podbolotova E. I. , Agapova O. I.
Published: January 2025

Silk is becoming one of the key materials in contemporary bioengineering and medicine due to its unique physicochemical and biological properties. This review article discusses the main components of silk, fibroin and sericin, their structure and functional characteristics, as well as their importance in the production of biocompatible and biodegradable materials. Modern methods of modifying silk to enhance its mechanical and biological properties are considered, including physical, chemical, and genetic manipulation. The use of silk in tissue engineering, development of medical implants, controlled drug delivery systems, and biosensors is given particular consideration. In conclusion, the prospects for further silk research targeted at creating innovative biomaterials for medical applications are discussed.
Early outcomes of kidney transplantation in recipients with type 1 diabetes mellitus and end‑stage kidney disease resulting from diabetic nephropathy
Authors: Lazareva K. E. , Dmitriev I. V. , Balkarov A. G. , Shmarina N. V. , Zhuravel N. S. , Anisimov Yu. A. , Alexandrova V. O.
Published: January 2025

Objective: to analyze early outcomes of kidney transplantation (KT) in patients with type 1 diabetes mellitus (T1D) and stage 5 chronic kidney disease resulting from diabetic nephropathy.

Materials and methods. The study group included 145 T1D patients who underwent KT at the kidney and pancreas transplant department of Sklifosovsky Research Institute for Emergency Medicine between January 1, 2007 and December 31, 2023. Among them were 57 men (39.3%) and 88 women (60.7%), the median age was 41.5 [35–47] years. The median age at disease onset was 14.6 [9–17] years. Organ donors consisted of 100 (69%) men, 40 (27.6%) women, and there was no information on the sex of 5 donors (3.4%). Donor median age was 46 [35.5–53] years.

Results. Ninety-nine recipients (68.3%) had primary renal allograft function (PRAF), whereas 46 recipients (31.7%) had delayed function. The median time for azotemia to normalize was 6 [3; 6] days in PRAF patients and 20.5 [14; 27] days in those with delayed function. Overall, there were 9.7% (n = 14) surgical complications, 12.4% (n = 18) acute rejection crisis, and 9.7% (n = 14) infectious complications. Median serum creatinine and urea levels at discharge were 123 [99–164] μmol/L and 10 [7.4–14] mmol/L, respectively; median fasting blood glucose levels before transplantation and at discharge were 9.8 [7.8; 12] mmol/L and 8.1 [6.5; 10] mmol/L, respectively. A total of 125 patients (86.2%) were discharged with adequately functioning kidney graft, while 13 patients (9%) were discharged with graft dysfunction that did not require renal replacement therapy; one patient (0.7%) was transferred to the outpatient stage of treatment to continue dialysis therapy; however, renal allograft function was restored within 2 months post-transplant.

Conclusion. Although T1D patients remain the most severe category of dialysis patients, our findings suggest that KT is an effective treatment option for them with high graft and recipient survival rates.
A rare case of transplant hepatectomy for metachronous colorectal cancer metastasis (de novo)
Authors: Zagainov V. E. , Kiselev N. M. , Komarov D. V. , Vasenin S. A. , Ashimov E. A. , Myalik D. S. , Gamayunov S. V. , Romanov S. V. , Ryabova E. N.
Published: January 2025

In the presented case, a patient who underwent liver transplant procedure for cirrhosis resulting from chronic hepatitis C was diagnosed with colorectal cancer 12 years after the operation. A combined treatment plan consisting of right hemicolectomy followed by nine cycles of adjuvant polychemotherapy using the FOLFOX6 regimen was performed. Seven months following the conclusion of treatment, 22×35 mm foci in segment 8 was detected as a sign of metastatic liver disease. The patient had a transplant hepatectomy. At present, the relapse-free survival is 22 months.
Fulminant emphysematous pyelonephritis in a transplant kidney (clinical observation and literature review)
Authors: Trushkin R. N. , Andreev S. S. , Belavina N. I. , Isaev T. K. , Okonskaya D. E. , Stolyarevich E. S. , Klochkova N. N. , Lysenko M. A.
Published: January 2025

Emphysematous pyelonephritis (EPN) is a necrotizing infection of the renal parenchyma and its surrounding areas that causes gas accumulation around the renal parenchyma, collecting system and surrounding tissues in the process of vital activity of several microorganisms. EPN occurs nearly exclusively in people with diabetes. Treatment strategies for EPN have evolved over the past 20 years, with minimally invasive procedures replacing nephrectomy, which has resulted in lower mortality rates (12.5–13%). EPN is rare in kidney transplant (KT) recipients and is characterized by a severe, often fulminant course with a high rate of adverse outcomes, which is determined primarily by background immunosuppressive therapy. There is no universally accepted consensus on the radiographic classification of EPN in KT recipients and its management. We present the first description of EPN in transplanted kidney in a 45-year-old woman with post-transplant diabetes, obesity and recurrent urinary tract infections. Massive antibiotic therapy (ABT), percutaneous nephrostomy, transplantectomy, renal replacement therapy, selective cytokine adsorption, and ventilatory support were all administered on the patient after she was admitted to the hospital with increasing clinical symptoms of sepsis and multiple organ failure. Death occurred on the fourth day after disease onset. The article examines 38 clinical cases from the English-language segment of the medical literature from the late 1970s to the present. EPN in KT recipients is characterized by the predominance of male gender, including among the deceased, rapid development of sepsis and acute kidney injury. There was no statistically significant difference in the frequency of emergency transplantectomies among surviving and deceased patients. Mortality was 28%. The issue of EPN in transplanted kidney requires more research and the development of optimal therapeutic plans, including surgical strategies.