bluuebunny/crossref_metadata_2025 huggingface dataset:
La densidad aparente y el tamaño de agregados del suelo controlan el crecimiento radical de Megathyrsus maximus
Authors: Ocampo Quijano Lucia Eloisa , Osorio Vega Walter N. , Martínez Atencia Judith , Cabrera Torres Kenneth R.
Published: September 2022

La importancia de las propiedades físicas del suelo influye de manera apreciable en su funcionamiento, calidad del agua, control climático, ciclo de los nutrientes y biodiversidad, entre otros. Estas proporcionan más funciones ecosistémicas que solamente el aporte nutricional para la producción agrícola. Actualmente, el suelo está sometido a presión de manejo para la producción de alimentos, energía y materia prima y esto ha llevado a su deterioro físico y degradación. Este trabajo tiene como objetivo evaluar los efectos de la densidad aparente y el tamaño de agregados de suelo de sistemas silvopastoriles (SSP) (proveniente de pasturas del bosque seco tropical) sobre el crecimiento del pasto guinea (Megathyrsus maximus) cv. Mombasa. Para tal fin, se realizaron dos experimentos separados bajo condiciones de invernadero, estableciendo valores crecientes a cada variable a través de ejercer fuerzas mecánicas (densidad aparente: 0.93-1.80 Mg m-3) y tamizado (tamaño medio de agregados: 0.125-7.15 mm) y luego se sembraron semillas del pasto y se dejaron crecer por 30 días. Se encontraron dos modelos funcionales que relacionan la biomasa de las raíces del pasto con el valor de la densidad aparente y con el tamaño medio de agregados del suelo. Se concluye que para ambas variables se detectan modelos de regresión cuadrática, es decir, de punto óptimo; siendo estos valores óptimos para la densidad aparente de 1.0 Mg m-3 y de tamaño de agregados de 1.5-2.0 mm. Estos parámetros podrían ser utilizados como indicadores físicos en el diagnóstico de la salud del suelo y de utilidad en el establecimiento de pasturas de la región del Valle del Rio Sinú.
Diseño y desarrollo de una herramienta didáctica interactiva para la educación y promoción de la lactancia materna
Authors: Laguna Muñoz Mateo Isaac , Guerrero Castellanos Rosario , Pinzón Villate Gloria Yaneth
Published: September 2022

En Colombia, la práctica de la lactancia materna de manera exclusiva hasta los seis meses es reducida. En el Semillero de Investigación en Alimentación del Lactante y del Niño Pequeño, del Departamento de Nutrición Humana de la Universidad Nacional de Colombia, se formuló un proyecto con el objetivo de desarrollar una herramienta didáctica para la promoción de la lactancia materna durante la educación y/o consejería en lactancia a las madres y sus familias. Se adaptaron y combinaron diferentes metodologías, tales como el «doble diamante» para estructurar las fases del proyecto, la herramienta PESTEL para el proceso de identificación y comprensión de los factores determinantes de la lactancia materna en Colombia, la herramienta de definición de requerimientos y factores determinantes de diseño y la técnica de grupo focal para recolectar percepciones respecto del producto y el análisis de nivel de satisfacción. Como resultado, se obtuvo una herramienta pedagógica consistente en un modelo de simulación de la glándula mamaria que presenta información sobre tipos de leche, secuencia de producción y salida de la leche, y tipos de pezón. Se concluye que es posible contribuir a la salud materno infantil desde el trabajo interdisciplinario entre las áreas de la salud y del diseño.
CONDICIONES PALEOCLIMATICAS MIOCENICAS EN LAS CAPAS ROJAS Y EN LOS PALEOSUELOS DE LOS GRUPOS LA ARENOSA Y LA VENTA, DESIERTO DE LA TATACOA, HUILA, COLOMBIA
Authors: Flórez Molina María Teresa
Published: September 2022

Del Mioceno del Valle Superior del Magdalena, Colombia, se resaltan los Grupos La Venta y La Arenosa. En La Venta (13.8-11.6 Ma, pos oscilaciones), la sedimentación la produjo ríos aluviales y fluviales que dejaron enormes depósitos arenosos, limosos y gravillosos rosados en base y techo, al interior capas líticas grises y, limos rojos, duros y meteorizados y paleosuelos. Sobresale dentro del grupo la Formación Villavieja por su riqueza fosilífera y en ella la Unidad Arenas Ferruginosas. En esta los paleosuelos (Sodic Haplotorrerts), se formaron en un clima estacionalmente muy contrastado, bajo un régimen tórrido (inviernos fríos y húmedos y veranos muy cálidos y más secos). La Arenosa es contemporánea con el Óptimo Climático del Mioceno Medio (MMCO), la Transición Climática del Mioceno Medio (MMCT) y la Anomalía Isotópica de Oxígeno (Mi-3b). Su sedimentación la produjo enormes ríos caudalosos que dejaron depósitos arenosos y limosos grises. En él se resalta La Formación La Borrega que tiene cuatro Paquetes Colorados (PC) duros y meteorizados, coetáneos con el MMCO.  En los limos y arenas que los separan, cinco paleosuelos (Lithic Haplusterts), formados en un clima estacional, contrastado, bajo un régimen ústico (inviernos fríos y extremadamente húmedos). La Venta y La Arenosa, tienen capas rojas altamente meteorizadas enriquecidas en carbonatos, sales, Fe y Al, sin evidencias de pedogénesis. Los paleosuelos contenidos dentro de ellas, también son de color rojo. Este color podría ser debido a la liberación de hierro de los minerales primarios, por meteorización y/o pedogénesis. Su difusión dentro de la matriz y posterior oxidación, se propone como el mecanismo responsable del color dominante en las capas rojas del desierto de La Tatacoa.
RIQUEZA Y ABUNDANCIA DE MARIPOSAS DIURNAS EN ÁREAS VERDES URBANAS DEL MUNICIPIO DE LA DORADA, (CALDAS)
Authors: Gómez Salazar Juan Camilo , Henao-Bañol Efraín Reinel , Murillo-Montoya Sergio Adrian , Tunarrosa-Echeverría Eliana Marcela
Published: September 2022

Las mariposas diurnas son un grupo diverso y relativamente bien conocido en Colombia. Sin embargo, son pocos los estudios que evalúan su diversidad en los parques urbanos y periféricos, por lo tanto, se planteó esta investigación, con el fin de evaluar la riqueza y abundancia de mariposas diurnas presentes en áreas verdes urbanas del municipio de La Dorada, (Caldas). El estudio fue realizado en 4 parques urbanos de este municipio, entre los meses de julio y noviembre de 2020, con un esfuerzo de muestreo de 288 horas; las mariposas fueron recolectadas con jama y trampas Van Someren-Rydon cebadas con camarón licuado y banano en descomposición. Se colectaron 308 mariposas pertenecientes a 39 especies, siendo las más abundantes: Phoebis sennae, Phoebis argante y Ascia monuste. Los índices de Shannon y de equitatividad J, indican que el parque periférico de Guarinó es el que presenta una mayor diversidad y equitatividad, con un 87% de las especies reportadas, entre las que se destaca Parides eurimedes una especie endémica de Colombia. A su vez, la curva de acumulación de especies indica que la representatividad del muestreo estuvo el 85 y 81% respectivamente con base en los estimadores Chao 1 e ICE.
CARACTERIZACIÓN ENTOMOLÓGICA (MARIPOSAS, ESCARABAJOS COPRÓFAGOS Y ABEJAS DE LAS ORQUÍDEAS) EN LA VEREDA PEREGRINOS EN EL MARCO DE LAS EXPEDICIONES CAQUETÁ-BIO
Authors: Henao Bañol Efraín Reinel , Rodriguez-Chilito Edna Patricia , Velásquez Valencia Alexander
Published: September 2022

La pérdida de hábitat en bosques amazónicos a causa de la deforestación, ejerce presiones ambientales que alteran las condiciones físicas y ecológicas de los ecosistemas, esto provoca una disminución en la riqueza de estos insectos ya que son sensibles a los cambios ambientales. Objetivo. Conocer la riqueza y abundancia de abejas euglosinas, escarabajos coprófagos y mariposas en la vereda Peregrinos, Solano-Caquetá. Método. Para conocer la diversidad de estos grupos se realizaron muestreos en tres senderos, donde se establecieron 20 puntos de muestreo, a una distancia de 50 m cada uno. Para recolecta de mariposas se instalaron trampas Van Someren Rydon a la máxima altura posible en busca del dosel, con dos cebos (pescado en descomposición y fruta fermentada). Para la recolecta de abejas se utilizaron trampas para euglossinos, que se instalaron a una altura de 5 m., con tres atrayentes (Eucalipto, Metil Salicilato, Vainilla), para escarabajos coprófagos se instalaron trampas de caída (Pitffal) que fueron instaladas a ras del suelo, con estiércol de humano. Los muestreos se realizaron en marzo y abril de 2021. Resultados. Se recolectaron un total de 3263 individuos, de los cuales 921 individuos de abejas euglossinas, pertenecientes a 4 géneros (Euglossa, Eulaema, Exaerete, Eufriesea) y 22 especies, 1428 individuos de escarabajos coprófagos, pertenecientes a 9 géneros y 16 especies y 914 individuos mariposas pertenecientes a 6 familias y 306 morfoespecies (255 especies identificadas). Conclusión. La presencia de especies poco conocidas y carismáticas de los géneros Morpho y Agrias, además de la alta riqueza en los diferentes grupos estudiados indica el alto grado de conservación, junto con su gran diversidad biológica, que justifican el diseño de medidas para su preservación y conservación.
Diagnostic methods of subclinical mastitis in bovine milk: an overview
Authors: Narváez-Semanate José Luis , Daza Bolaños Carmen Alicia , Valencia-Hoyos Carlos Eduardo , Hurtado-Garzón Diego Tomás , Acosta-Jurado Diana Carolina
Published: September 2022

Bovine mastitis is defined as inflammation of the udder caused mainly by bacterial pathogens and depending on the degree of inflammation it is classified as subclinical and clinical. Particularly in the subclinical form, there are no alterations in milk, udder or animal, but it does affect its components, impairing its use in the dairy industry, and leading to significant economic losses due to discard and decrease in production. Therefore, the detection of subclinical mastitis is based on field and laboratory tests. Currently, there are several methods, mostly based on the measurement of somatic cells present in milk because of the inflammatory process. In this paper, an approach is made on the different methods of detection of subclinical mastitis in milk from conventional or traditional to alternative methods with greater precision.
A methodological proposal for quality control of the soil moisture variable, measured in Colombian automatic agrometeorological stations
Authors: Hernández Guzmán Francisco Javier , Cleves-Leguízamo José Alejandro , Diaz Almanza Eliecer David
Published: September 2022

Methodological criteria for data quality control with geophysical range and spectrum consistency were evaluated, establishing flags and quality indicators for soil moisture data records, in a range of depths between 10, 30, and 50 cm, from automatic agro-meteorological stations located in the most important agricultural regions of Colombia. Data for analysis were collected from 105 stations of the IDEAM network, in an observation window from 2001-2020. The results showed that 40.3% of the soil moisture data were of good quality, 12.9% were questionable due to spectrum flags, 14.3% were questionable due to geophysical range and 32% were erroneous because the values were not possible and/or missing. The depth closest to the surface had the highest number of quality flags, suggesting that the soil layer has the highest error detection rate associated with soil moisture condition recording; the most common quality flag was C02: “Soil moisture >60% & ≤100%”, detected in 93% of the sensors, and the second most frequent flag was C01: “Soil moisture ≥0% & <3%”. It was concluded that the proposed methodology provides highly satisfactory results in the detection of anomalous soil moisture records, in order to make adjustments to the environmental conditions of Colombia.
Design of crack-free laser additive manufactured Inconel 939 alloy driven by computational thermodynamics method
Authors: Zeng Congyuan , Ding Huan , Bhandari Uttam , Guo S. M.
Published: September 2022

This paper examined the effect of Si addition on the cracking resistance of Inconel 939 alloy after laser additive manufacturing (AM) process. With the help of CALculation of PHAse Diagrams (CALPHAD) software Thermo-Calc, the amounts of specific elements (C, B, and Zr) in liquid phase during solidification, cracking susceptibility coefficients (CSC) and cracking criterion based on $$\left| {{\text{d}}T/{\text{d}}f_{{\text{s}}}^{1/2} } \right|$$

d
T
/
d

f

s

1
/
2

values (T: solidification temperature, fs: mass fraction of solid during solidification) were evaluated as the indicators for composition optimization. It was found that CSC together with $$\left| {{\text{d}}T/{\text{d}}f_{{\text{s}}}^{1/2} } \right|$$

d
T
/
d

f

s

1
/
2

values provided a better prediction for cracking resistance.

Graphical abstract
Graphitic surface layer formation on organic substrates for electronics using a concentrated solar simulator
Authors: Abuseada Mostafa , Alghfeli Abdalla , Fisher Timothy S.
Published: September 2022

Heat spreading is an important attribute that improves thermal management and operation of high-performance packages, such as those for solid-state power amplifiers. This attribute can be enhanced through direct transformation of polymers into graphitic films. The present work reports a custom vacuum deposition process that synthesizes thin graphitic layers on organic substrates through direct pyrolysis via concentrated irradiation from a xenon lamp to produce a peak heated zone of approximately 3 cm diameter with a maximum heat flux of 3.2 MW/m$$^2$$

2

. The light source, replaceable with concentrated terrestrial solar power, provides ultrafast heating of substrates through rapid flashes (< 0.5 s) and improves growth rates over relatively larger areas compared to laser processing, mitigating the issue of porosity in graphitic layers that deteriorate heat spreading capabilities. The enhanced organic substrates are analyzed using Raman and energy-dispersive X-ray spectroscopy, scanning electron microscopy, and thermal diffusivity measurements, indicating graphitic conversion.

Graphical abstract
Justifying parameters for the automatic servo control system of a rotary plate vacuum pump in the milking machine
Authors: Aliiev Elchyn , Paliy Andriy , Kis Viktor , Milenin Andriy , Ishchenko Katerina , Paliy Anatoliy , Levchenko Iruna , Livoshchenko Lyudmila , Livoshchenko Yevheniia , Plyuta Larisa
Published: September 2022

The scientific task to improve energy efficiency and ensure the process of vacuum regime stabilization in the operation of milking machines has been solved.
A mathematical model of the process of functioning of the servo control system of a rotary plate vacuum pump was built; the numerical modeling of its workflow was carried out.
This paper reports the results of experimental studies on the influence of the regime parameters of the rotary plate vacuum pump on the efficiency of its operation, as well as the results of experimental research on the servo control system for the rotary plate vacuum pump.
The operational process of the rotary plate vacuum pump HB-1200 for a milking machine was investigated. The influence of mode parameters (rotor speed n and vacuum pressure P) on the performance of the vacuum pump, Qa, vacuum pressure fluctuation, ΔP, and the power consumption of the vacuum pump drive, Np, has been determined.
The servo control system of the rotary plate vacuum pump was experimentally investigated based on the developed algorithms of its operation. In a generally accepted algorithm, vacuum fluctuation increases with increasing an airflow rate: at ΔQa=45 l/min – ΔP=2.3 kPa; at ΔQa=90 l/min – ΔP=4.6 kPa; at ΔQa=135 l/min – ΔP=6.4 kPa. Unlike the generally accepted one, the developed algorithm enables a stable vacuum mode with the largest vacuum fluctuation being ΔP=2.4 kPa.
For the first time, the functional dependence of the influence of the regime parameters of the rotary plate vacuum pump with its automatic servo control system on the stability of the vacuum regime of a milk-vacuum system in the milking machine was established.
The results can be applied when improving milking machines in terms of ensuring the stabilization process of the vacuum regime.
Determining the influence of geometric factors and the type of heat carrier on the thermal resistance of miniature two-phase thermosyphons
Authors: Kravets Vlаdіmіr , Konshin Valeriy , Hurov Dmytro , Vorobiov Mykyta , Shevel Ievgen
Published: September 2022

This paper reports experimental data on the total thermal resistance of copper two-phase thermosiphons with internal diameters of 3 mm, 5 mm, and 9 mm, 700 mm long. Water, ethanol, methanol, and freon-113 were used as heat carriers. During the study, thermosiphons were located vertically. The length of the heating zone varied from 45 mm to 200 mm while the length of the condensation zone was constant and equaled 200 mm. The filling coefficient of thermosiphons varied from 0.3 to 2.0. Two series of experiments were conducted. The first series was distinguished by the fact that the filling coefficient of three thermosiphons with an internal diameter of 9 mm varied from 0.3 to 0.8 with the same length of the heating zone of 200 mm. The second series of experiments was carried out on thermosiphons with internal diameters of 3 mm and 5 mm. With the same amount of heat carrier, the length of the heating zone changed from 45 mm to 200 mm. As a result of research, it was determined that the total thermal resistance of thermosiphons is influenced by both their geometric factors (internal diameter and filling coefficient) and the type of heat carrier. The main factor that influenced the value of thermal resistance was also the transmitted heat flux. An increase in heat flow led to a significant decrease in thermal resistance. The maximum heat flux was determined with minimal thermal resistance. To calculate the value of the thermal resistance of thermosiphons, two dimensionless dependences were derived, which hold for two ranges of Reynolds numbers. For small Reynolds numbers (until 2000), which characterize the beginning of the action of vaporization centers and their gradual increase, the degree indicator was –0.8, and for larger Reynolds numbers, up to critical phenomena, the degree indicator was at the level of –0.3.
Reducing the biogenic corrosion of concrete in a pigsty by using disinfectants
Authors: Shkromada Oksana , Fotina Tatiana , Dudnyk Yevheniia , Petrov Roman , Levytska Viktoriya , Chivanov Vadym , Bogatko Nadiya , Pikhtirova Alina , Bordun Olexandr
Published: September 2022

The object of this study is the regularity of changes in the biogenic destructive effect of microorganisms on the concrete structural elements of livestock facilities due to the use of the original liquid phase mixture of disinfectant based on aldehyde and surfactant.
Microorganisms use construction materials as a substrate for growth and nutrition; they produce citric acid, which leads to a change in the composition and morphology of hydrated cement new formations.
The composition of the microflora of the pigsty has been determined, and the minimum concentration of disinfectant based on glutaraldehyde and didecyl dimethyl ammonium chloride was found. By the TPD MS method, a decrease in the intensity of carbon dioxide (CO2) release in concrete samples during the heating of the sample to 900 °C was proved, compared to the control intact corrosion sample. Electron microscopy of concrete samples shows the presence of destructive changes and colonies of micromycetes. It was established that calcite was intensively released in the control sample of concrete, which retained its integrity and was not subjected to corrosion when heated to a temperature of 600 °C. Electron microscopy confirms the preservation of the homogeneous structure of concrete.
The use of a disinfectant based on glutaraldehyde and didecyl dimethyl ammonium chloride at a concentration of 1 % destroys colonies of micromycetes, 2 % – the shell of microorganisms, and 3 % – biofilm. Treatment of concrete with a disinfectant at a concentration of 3 % destroys microorganisms Aspergillus fumigatus and Penicillium oxalicum, inhibits the process of biological corrosion of concrete, and strengthens the structure of concrete.
The results of the experiment can be applied to inhibit the corrosion of concrete and extend the life of building structures made of concrete through the use of a disinfectant based on aldehyde and didecyl dimethyl ammonium chloride at a concentration of 3 %.
Indentifying the effect of micro friction stir spot welding (µFSSW) parameters on weld geometry, mechanical properties, and metallography on dissimilar materials of AZ31B and AA1100
Authors: Membala Semuel Boron , Sutresman Onny Sutyono , Arsyad Hairul , Syahid Muhammad , Widyianto Agus
Published: September 2022

Micro-friction stir spot welding (µFSSW) is one type of welding that is suitable for joining lightweight materials. One of the challenges in joining lightweight materials with µFSSW is that the material is easily perforated, or the join is not strong enough, so it is necessary to select the right µFSSW parameters. In this article discusses about investigates the micro-Friction Stir Spot Welding (µFSSW) parameters on weld geometry, mechanical properties, and metallography on dissimilar materials of AZ31B and AA1100. The material thickness of the AZ31B and AA100 is 0.5 mm and 0.32 mm, respectively. The µFSSW tool is made of high-speed steel (HSS) with a pin diameter of 0.25 mm and a shoulder diameter of 0.5 mm. The constant process parameters of the µFSSW joint used, i. e., plunge depth, dwell time plunge rate, and high tool rotational speed of 33,000 rpm. Welding test results include weld geometry, mechanical properties, and metallography. Weld geometry testing to determine the weld nugget diameter. The mechanical properties test was shear tensile test and cross tensile test, while the metallographic test included macrostructure and microstructure observations. The results of the FSSW weld geometry show that at a dwell time of 700 milliseconds and a plunge depth of 600 microns, the weld pin diameter and weld shoulder diameter are close to the pin diameter and the diameter of the shoulder tool used. Dwell time and plunge depth has a significant effect on tensile strength. The maximum shear and cross loads achieved were 387±17 N and 29±2 N, respectively. Intermetallic compounds (IMC) are observed at the interface of the two materials, while a dwell time of 700 milliseconds give the effect of cracks on the inside of the weld
Determining the dynamic model of the charging resonant converter with inductive coupling by an experimental-analytical method
Authors: Pavlov Gennadiy , Obrubov Andrey , Vinnichenko Irina
Published: September 2022

This paper reports the advanced experimental-analytical method for determining the dynamic model of resonant converters of electricity. The object of research is semiconductor resonance converters and methods for analyzing their dynamics. The well-known experimental-analytical method for determining a dynamic model implements the sequence «experiment – analytics – dynamic model» when the structure of the system may be unknown. Then it is necessary to determine the structures and parameters of many dynamic models, among which the optimal ones will be selected. This makes it difficult to establish usable patterns.
Therefore, it is advisable to develop this method, according to which it is proposed to determine the parameters of the dynamic model according to the following sequence. First, carry out the analysis of the converter circuit and construct the dynamic models of sub-circuits. Next, an experiment is conducted with a simulation structural model of the converter, which is an input model of identification. After that, procedures are carried out for identifying and selecting optimal dynamic models among a set of initial identification models, as a result of which equivalent dynamics equations, gear ratios, and transfer functions of the selected converter models are obtained.
In the proposed modification of the method, the converter model is determined in advance, and at the identification stage it is enough to determine only its parameters. More simply, patterns are identified, and the number of initial identification models is significantly reduced. The results of using the proposed method on the example of determining the dynamic model of the charging resonance converter with inductive coupling between the charger and the battery of an autonomous object are given. The results of the presented analysis can be used in the design of resonant contactless chargers.
Improving the technique for assessing the condition and predicting the wear of the rock destruction tool equipment
Authors: Grydzhuk Jaroslav , Dzhus Andriy , Yurych Andriy , Yurych Lidiia , Dorokhov Maksym , Livinskyi Andrii
Published: September 2022

To ensure the trouble-free operation of the rock-destroying tool, the peculiarities of its interaction with the rock at different stages of work must be additionally studied. Still unexplored in full is the relationship between the state of the equipment of the rock-destroying tool and the oscillatory processes during the operation of the drilling tool. The basic dependences for determining the wear indicators of the equipment of the rock-destroying tool have been proposed. The scheme for implementing the method of assessing the condition and predicting the wear of equipment, taking into account the peculiarities of its interaction with the rock, has been improved. Underlying its implementation is the presence of a law of change of at least one generalized coordinate of an arbitrary cross-section of a drilling tool. Bench experimental studies were carried out, according to the results of which the dependence of the depth of the face deepening on the mode parameters of drilling and the geometry of the equipment was established. It was found that the wear of the cutter by 1 mm causes a decrease in the amplitude of longitudinal oscillations by an average of 1.4 times. The obtained functions of deepening the face were used to determine the energy indicators of the process of rock destruction. Given the peculiarities of the implementation of the experiment, the work and power of the axial load for the destruction of the rocks of the pit were used for such indicators. It should also be noted that the construction of numerical models is necessary for a complete assessment and prediction of the wear of rock-destructive tools. They should reflect the mechanical system and provide the ability to obtain the values of parameters that are not determined by the results of a laboratory experiment.
Development of methods for the study of dicyclomine hydrochloride in combination with paracetamol as an object of forensic-pharmaceutical examination
Authors: Bevz Olena , Sych Igor , Fedosov Andrii , Vislous Olha , Sych Irina , Kryvanych Olga , Kobzar Nataliia , Perekhoda Lina
Published: September 2022

The aim. Selection and development of methods for the tasks of forensic pharmaceutical examination as case materials suspected of falsification or non-medical use of dicyclomine hydrochloride in combination with paracetamol in the form of tablets.
Materials and methods. The study presents the developed methods of detection and identification of dicyclomine by TLC, IR spectroscopy and GC-MS, which were performed using reagents that meet the EP, USP and USPU requirements, Class A glassware and qualified devices.
Identification by IR spectroscopy was performed in the range from 500 to 4000 cm-1 on the device “Nicolet 380 FT-IR Spectrometer by Thermo Fisher Scientific”.
TLC was performed on Sorbfil plates for TLC-PET-H-UV and Sorbfil plates for TLC-AF-UV (CJSC “Sorbpolymer”, Russia). The following systems were used as mobile phases: dioxane-chloroform-acetone-25 % ammonia solution (47.5:45:5:2.5); toluene-acetone-ethanol-25 % ammonia solution (45:45:7.5:2.5); ethyl acetate-methanol-25 % ammonia solution (17:2:1)). The resulting chromatographic zones were detected by irradiation with UV light and further treatment with color reagents (30 % iron (III) chloride solution; Dragendorff's reagent modified by Munier; Marquis reagent; Froehde reagent; Mandelin reagent; FPN reagent).
Analysis by gas chromatography with mass detection was performed using a gas chromatograph with a mass spectrometric detector GCMS-QP2020. Data were analyzed using the program: GCMSsolution, LabSolutions Insight (Shimadzu Corporation, Tokyo, Japan).
Results. For the first time, the conditions for the extraction of dicyclomine hydrochloride from aqueous solutions were studied and the optimal conditions for their isolation as an object of forensic pharmaceutical examination is defined. The method of detection of dicyclomine hydrochloride and paracetamol in the drug “Trigan-D” by the methods of thin-layer chromatography, gas-liquid chromatography and chromato-mass spectrometry was developed, and the detection limits of the substances under study were determined.
Conclusion. The developed methods for dicyclomine hydrochloride in the form of tablets with paracetamol meet the requirements of the current legislation of Ukraine and the Ministry of Justice of Ukraine. The data obtained prove the high sensitivity and reproducibility of the methods and prove the possibility of their introduction into the practice of forensic pharmaceutical examination
Utilization of water extract of yellow potato (Solanum tuberosum L.) in hydrogel eye mask as anti-aging formulation
Authors: Mawalia Mawalia , Reveny Julia , Harahap Urip
Published: September 2022

The thinness and sensitivity of the skin in the area under the eyes cause the skin in this area to easily show signs of aging. Hydrogel masks contain quite a lot of water, so during use this mask will moisturize the skin longer. A hydrogel eye mask containing yellow potato tuber water extract is used for the prevention of premature aging, especially under the eyes.
The purpose of this study was to determine whether hydrogel eye mask preparations containing water extract of yellow potato tubers can provide an anti-aging effect.
Material and methods: The yellow potato tuber water extract was screened for phytochemicals, then formulated into a hydrogel eye mask with a concentration of 0.25 %, 0.5 %, and 1 %. Evaluation of the hydrogel eye mask preparation includes organoleptic, weight, thickness, pH test, tensile test, swelling power, shrinkage, stability, cycling test, hedonic test, and anti-aging. Anti-aging parameters measured include moisture, pores, blemishes, and wrinkles. The treatment was carried out for four weeks by applying the mask twice a week.
Results: The results showed that all hydrogel eye mask formulas were stable during storage and cycling tests. All formulas meet pH values, shrinkage, elasticity, swellability, and irritation tests. The hedonic test on volunteers shows the most preferred concentration of 1 %. The results of the anti-aging effectiveness test of the best hydrogel eye mask preparation is a concentration of 1 % with an increase in humidity of 27 %, a decrease in pores of 35.8 %, blemishes of 40 %, and wrinkles of 37.6
Conclusion: That the different concentrations of each formula showed different anti-aging activities and the best formula was 1 % with moisture values of 27 %, pore values of 35.8 %, blemishes of 40 %, and wrinkles values of 37.6 %, which indicated anti-aging activity
Research of sound insulation frequency response for a multilayer inhomogeneous wall structures
Authors: Zaretskyi Vladyslav , Bida Dmytro
Published: September 2022

The object of research is the amplitude-frequency characteristic of sound insulation of multi-layer heterogeneous structures. One of the most problematic places is the calculation methodology, due to the existence of standards such as ISO, DBN, which have some differences between them, and software, the calculation methodology of which is not fully known, due to the copyright of the latter.
Using the modeling method in the INSUL software complex, the amplitude-frequency characteristics of the sound insulation of the partition walls between the halls were obtained. On-site measurements were carried out on a real object identical to the simulated fence constructions presented by the MULTIPLEX cinema in the DAFI shopping center in Dnipro (Ukraine). The calculation methodology of the INSUL software is completely unknown. According to information from open sources, it can be concluded that linear modeling of the amplitude-frequency characteristic is used. The measurements were carried out according to DBN B.1.1-31:2013. Data obtained theoretically, during modeling, and experimentally are compared with each other. The expediency of taking into account the results obtained with the help of the INSUL software when writing a new methodology for the state standard or for improving the latter is considered. Comparing real and simulated amplitude-frequency characteristics, it is possible to conclude that the INSUL software complex is not accurate at high frequencies. This phenomenon may be related to the inherent resonances of the existing partition, or to the quality of the installation, which can be equated to a setup error, due to the lack of possibility of influencing the quality of the construction process of the measurement object. A possible error occurs when the soundproof partition is violently connected to the existing structures of the building, or due to the presence of resonating technical elements in the cinema hall (air ducts, metal structures of the stage and seats, etc.). This error is not influential due to the not significantly small wavelength in the frequency of 3000–8000 Hz. Therefore, as a conclusion, the INSUL software can be used in the development of the methodology of state standards for sound insulation in buildings.
Alkali Lignin and Alkali Combined Ozone-Treated Lignin for Sustainable Food Packaging Applications
Authors: SÖĞÜT Ece , SEYDİM Atıf Can
Published: September 2022

This study aimed to utilize the lignin-based structures extracted from chestnut shells, an agricultural waste, in chitosan (CH) films. In addition, black liquor was treated with ozone to obtain more homogeneous and compatible lignin fractions. Lignin was isolated from chestnut shells by alkali treatment (8% NaOH, 120°C/15 min), then sulfuric acid precipitation (0.5M) and drying. Black liquor obtained after an alkali treatment was further treated with ozone at ambient conditions to gain alkali combined ozone-treated lignin (OL). L and OL were added to CH film-forming solutions to fabricate CH-L and CH-OL films and films were characterized by barrier against water (WVP), morphologic, thermal properties, optical and antioxidant properties. Fourier transform infrared (FTIR) data confirmed that the isolated L and OL had different structures, and the films indicated a potential interaction between lignin-based structures and CH matrices. Moreover, incorporating L and OL into the CH films increased the opacity and antioxidant activity of films. The addition of lignin-based structures caused a plasticizing effect on the CH films, corresponding with the tensile and thermal properties. The WVP of CH was not significantly influenced upon the addition of lignin-based structures.
Microbial Transformation of 3,3-Dimethylcyclohexyl methyl ketone and Antimicrobial Evaluation
Authors: ÖZŞEN BATUR Özge , KIRAN İsmail , BAŞER Kemal , DEMİRCİ Fatih
Published: September 2022

3,3-Dimethylcyclohexyl methyl ketone (Herbac®) is a fine fragrance compound used in the cosmetic industry. In this study, the biological derivatisation of the substrate 3,3-dimethylcyclohexyl methyl ketone by 18 fungal cultures was carried out to obtain new derivatives. Among the evaluated, the plant fungus Aspergillus niger ATCC 10549, biotransformed the substrate to the 4-hydroxy derivative in 19% yield. The structure was determined by using NMR and GC-MS spectroscopic methods. In addition, the antimicrobial activity of Herbac® with the metabolite against a panel of pathogenic microbial strains were evaluated using in vitro microdilution. The results showed that the metabolite was relatively more susceptible compared to the substrate Herbac®.
Efetividade da intervenção educativa com manual para redução da ansiedade e estresse: ensaio clínico controlado
Authors: Murakami Luisa , Rua Elizabete Schwarz , Santos Vinicius Batista , Lopes Juliana de Lima
Published: September 2022

RESUMO Objetivo: Avaliar a efetividade da intervenção educativa mediante manual informativo na redução da ansiedade, estresse e alterações dos sinais vitais em pacientes que aguardavam o cateterismo cardíaco. Métodos: Ensaio clínico paralelo, randômico, controlado, cego. Incluíram-se pacientes que aguardavam o cateterismo cardíaco; os que receberam o manual informativo foram randomizados para o grupo-intervenção; e os que receberam informações rotineiras da unidade, para o grupo controle. Utilizaram-se Inventário de Ansiedade-Estado e Escala de Estresse Percebido. Realizou-se teste ANOVA para análise dos desfechos entre os grupos. Clinical Trials NCT03369873. Resultados: Não houve alteração em relação ao tempo, primeiro e segundo momento (ansiedade, p=0,225; e estresse, p=0,696), interação (ansiedade, p=0,183; e estresse, p=0,444) ou grupos, controle e intervenção (ansiedade, p=0,341; e estresse, p=0,624). Conclusão: Embora a intervenção educativa realizada não tenha apresentado impacto na redução da ansiedade e estresse, esse tipo de intervenção deve ser mantido, para maior conforto e segurança dos pacientes e familiares.
Factors associated with inadequate treatment of syphilis during pregnancy: an integrative review
Authors: Torres Paula Marília Afonso , Reis Amanda Ribeiro de Paula , Santos Andressa Silva Torres dos , Negrinho Nádia Bruna da Silva , Menegueti Mayra Gonçalves , Gir Elucir
Published: September 2022

ABSTRACT Objectives: to analyze the evidence available in literature on factors associated with inadequate treatment of syphilis in pregnant women. Methods: an integrative review, carried out in the LILACS, CINAHL, Web of Science, Scopus, PubMed and EMBASE databases, with controlled descriptors therapeutic and prenatal syphilis. Results: nine publications composed the interpretative analysis, in which low education, income and maternal age, temporary lack of medication and HIV infection were associated with inadequate treatment of syphilis during pregnancy, in addition to delay or absence of prenatal care and receiving the 1st dose of penicillin, lack of tests or treatment less than 30 days before childbirth, and partners’ low compliance with treatment. Final Considerations: among the main factors associated with inadequate treatment, clinical and sociodemographic aspects stand out, as well as failures in drug dispensing, prescription and monitoring of treatment of pregnant women and their partners by the health system.
Relación entre el abuso cara a cara y digital en el noviazgo con la calidad de vida relacionada con la salud en adolescentes mexicanos
Authors: Javier-Juárez Paola , Hidalgo-Rasmussen Carlos Alejandro , Chávez-Flores Yolanda Viridiana , Torres-Chávez Lilia , Rosales-Damián Guillermo
Published: September 2022

El objetivo de esta investigación fue identificar si existe relación entre la victimización por abuso cara a cara y digital en el noviazgo con la calidad de vida relacionada con la salud (CVRS) en estudiantes adolescentes, ajustando por sexo. Participaron 398 estudiantes de entre 15 y 18 años de edad (62,8% mujeres). Se aplicaron las siguientes escalas adaptadas a población adolescente mexicana: Violence in Adolescents’ Dating Relationships Inventory, Cyber Dating Abuse Questionnaire y el KIDSCREEN-10. Se encontró que el 55,5% reportó haber sido víctima de abuso cara a cara y digital. Los puntajes de CVRS fueron menores para las mujeres a diferencia de los hombres. Mediante un modelo de ecuaciones estructurales se encontró una asociación negativa, estadísticamente significativa y con magnitud moderada entre el abuso en el noviazgo (cara a cara y digital) y la CVRS. Los resultados sugieren que mientras mayor sea el nivel de victimización por abuso en las relaciones de noviazgo tanto cara a cara como digital, menor será la CVRS en las y los adolescentes estudiantes. Los resultados de este estudio muestran la importancia de considerar tanto el abuso cara a cara como el digital cuando se analiza el efecto de la violencia en el noviazgo sobre la CVRS.
ARE THERE DIFFERENCES IN CHRONIC PAIN AFTER LAPAROSCOPIC INGUINAL HERNIA REPAIR USING THE TRANSABDOMINAL TECHNIQUE COMPARING WITH FIXATION OF THE MESH WITH STAPLES, WITH GLUE OR WITHOUT FIXATION? A CLINICAL RANDOMIZED, DOUBLE-BLIND TRIAL
Authors: Azevedo Maurício Andrade , Oliveira Guilherme Blattner Torres de , Malheiros Carlos Alberto , Roll Sergio
Published: September 2022

ABSTRACT BACKGROUND: Regarding postoperative pain, it remains unclear whether non-fixation of the polypropylene prosthesis in transabdominal preperitoneal inguinal hernia repair produces the same outcomes as mesh fixation with glue or tackers. In addition, hernia recurrence is another aspect to be assessed in the comparison between non-fixation and mesh-fixation techniques (tackers and glue). AIMS: This study aimed to evaluate the incidence, quality of pain, and recurrence in patients undergoing laparoscopic inguinal hernioplasty (transabdominal preperitoneal) technique, comparing the fixation of the mesh with tackers versus with glue versus without fixation. METHODS: This is a prospective, double-blind study in which 63 patients presenting with primary unilateral inguinal hernia underwent laparoscopic transabdominal preperitoneal inguinal hernia repair and were randomized into three groups: no mesh fixation (n=21), mesh tacked (n=21), and mesh fixed with fibrin glue (n=21). Patients also responded to questionnaires in order to assess pain and pain quality and were followed up for 2 years. RESULTS: Neither mesh-fixation nor non-fixation techniques were found to affect postoperative chronic pain (p=0.535), but patients undergoing tacker fixation reported more pain descriptors (p=0.0021) and a higher pain index (p=0.002) on the McGill scale in the first 15 postoperative days (T0 and T1). No hernia recurrences were observed. CONCLUSIONS: Both mesh-fixation techniques (tackers and glue) used with the transabdominal preperitoneal approach did not influence the onset of inguinodynia, but tacker fixation was more likely to increase patient sensitivity to pain. Mesh placement without fixation produced the same pain and recurrence outcomes as mesh-fixation techniques. Also, no recurrence was observed in patients without mesh fixation in this study. Consequently, it has become an alternative therapy deserving consideration for hernia repair.
THYLENETETRAHYDROFOLATE REDUCTASE GENE POLYMORPHISMS AND SUSCEPTIBILITY TO ESOPHAGEAL CANCER: A CASE-CONTROL STUDY
Authors: Zaidan Evelise Pelegrinelli , Tomitão Michele Tatiana Pereira , Pereira Marina Alessandra , Kubrusly Marcia Saldanha , Vaz Safatle-Ribeiro Adriana , Takeda Flavio Roberto , Cecconello Ivan , Ribeiro Junior Ulysses
Published: September 2022

ABSTRACT BACKGROUND: The enzyme methylenetetrahydrofolate reductase is engaged in DNA synthesis through folate metabolism. Inhibiting the activity of this enzyme increases the susceptibility to mutations, and damage and aberrant DNA methylation, which alters the gene expression of tumor suppressors and proto-oncogenes, potential risk factors for esophageal cancer. AIMS: This study aimed to investigate the association between methylenetetrahydrofolate reductase 677C>T and methylenetetrahydrofolate reductase 1298A>C polymorphisms and susceptibility to esophageal cancer, by assessing the distribution of genotypes and haplotypes between cases and controls, as well as to investigate the association of polymorphisms with clinical and epidemiological characteristics and survival. METHODS: A total of 109 esophageal cancer patients who underwent esophagectomy were evaluated, while 102 subjects constitute the control group. Genomic DNA was isolated from the peripheral blood buffy coat followed by amplification by polymerase chain reaction and real-time analysis. Logistic regression was used to assess associations between polymorphisms and the risk of developing esophageal cancer. RESULTS: There was no association for methylenetetrahydrofolate reductase 677C>T and methylenetetrahydrofolate reductase 1298A>C polymorphisms and haplotypes, with esophageal cancer susceptibility. Esophageal cancer patients carrying methylenetetrahydrofolate reductase 677TT polymorphism had higher risk of death from the disease. For polymorphic homozygote TT genotype, the risk of death significantly increased compared to wild-type genotype methylenetetrahydrofolate reductase 677CC (reference) cases (p=0.045; RR=2.22, 95%CI 1.02–4.83). CONCLUSIONS: There was no association between methylenetetrahydrofolate reductase 677C>T and methylenetetrahydrofolate reductase 1298A>C polymorphisms and esophageal cancer susceptibility risk. Polymorphic homozygote genotype methylenetetrahydrofolate reductase 677TT was associated with higher risk of death after surgical treatment for esophageal cancer.
O ensino da psicanálise na graduação em psicologia: cursos e percursos no estado do Acre
Authors: França Larissa Oliveira , Santos Maria Liliane Gomes dos
Published: September 2022

Resumo Este trabalho teve como objetivo analisar os conteúdos de psicanálise ensinados nos cursos de psicologia do Acre por meio das ementas das disciplinas e bibliografias correspondentes, registradas nos projetos pedagógicos curriculares dos quatro cursos existentes no estado. Trata-se de um estudo descritivo de abordagem qualitativa e fonte do tipo documental, que recorreu à análise de conteúdo para conduzir a interpretação dos dados. Os resultados indicaram ementas com ênfase no ensino freudiano e privilégio de publicações nacionais. Entre as lacunas identificadas, destaca-se a carência de conteúdos a respeito da pesquisa psicanalítica e da clínica para além do modelo clássico, o que convoca a implementação de mudanças que possam subsidiar as investigações e as práticas no contexto amazônico, além de fomentar o desenvolvimento desta abordagem tendo como horizonte o percurso formativo que a disciplina freudiana exige.
Efeitos da privação alimentar de 48 horas na resposta de fase aguda em cavalos
Authors: Filippo Paula Alessandra Di , Duarte Bárbara Ribeiro , Albernaz Antônio Peixoto , Fonseca Leandro Abreu da , Viana Inácio Silva , Quirino Célia Raquel
Published: September 2022

Resumo O objetivo deste estudo foi avaliar o efeito da restrição alimentar na resposta de fase aguda em equinos. Vinte cavalos foram submetidos à restrição alimentar por 48 h enquanto outros 12 animais (controle) tiveram livre acesso à água e alimento. Os animais foram monitorados, examinados e amostras de sangue foram coletadas no início (0) do estudo e com 6, 12, 18, 24, 30, 36, 42 e 48 horas de restrição alimentar. Os dados foram submetidos à análise de variância bidirecional com medidas repetidas e a significância estatística foi P ≤ 0,05. Os cavalos toleraram a restrição alimentar sem complicações clínicas relevantes. A restrição alimentar induziu uma resposta de fase aguda caracterizada pela elevação das concentrações séricas de α2-macroglobulina (24-38 h), ceruloplasmina (36-48 h), α1-antitripsina (30-48 h), α1-glicoproteína ácida (42-48 h) e haptoglobina (42-48 h). A privação de nutrientes eleva os níveis de cortisol circulante, que atua no sistema imunológico inato o qual, então induz a resposta de fase aguda. Em conclusão, a restrição alimentar é um fator estressor físico para equinos, capaz de induzir uma reação proteica de fase aguda, caracterizada pelo aumento na produção de α2-macroglobulina, ceruloplasmina, α1-antitripsina, α1-glicoproteína ácida e haptoglobina.