bluuebunny/crossref_metadata_2025_split huggingface dataset:
Descomposición y liberación de nutrientes en biomasa por poda de cacao (Theobroma cacao L.) en Rionegro, Santander, Colombia
Authors: Rojas-Molina Jairo , Ortiz-Cabralez Leidy , Escobar-Pachajoa Laura Dayana , Rojas-Buitrago Mervin , Jaimes-Suarez Yeirme Yaneth 
Published: September 2021

Introducción. El ciclaje de nutrientes cumple un papel muy importante dentro de la sostenibilidad de sistemas productivos. En el cultivo de cacao (Theobroma cacao L.), la descomposición de la biomasa generada por las podas es base fundamental en la dinámica de nutrientes dentro del sistema. Objetivo. Cuantificar la tasa de descomposición y liberación de nutrientes de diferentes tipos de residuos vegetales generados por labores de poda del árbol de cacao. Materiales y métodos. El estudio se realizó en una finca cacaotera localizada en Rionegro, Santander, Colombia, entre junio y diciembre de 2012. Se estimó la tasa de descomposición y liberación de nutrientes (N, P, K, Ca, Mg) en los tratamientos T1: hojas y ramillas, T2: ramas secundarias y T3: ramas primarias, durante cinco períodos (8, 15, 23, 84 y 113 días); a través de la técnica de bolsas de descomposición. Resultados. La tasa de descomposición y liberación de nutrientes en hojas y ramillas fue significativamente más alta a los ocho días (0,1 k día-1), en comparación con ramas secundarias (0,06 k día-1) y ramas primarias (0,05 k día-1). La descomposición de las ramas secundarias presentó tendencia a ser constante a través del tiempo, pero fue el material con mayor porcentaje de liberación de nutrientes al final de la evaluación (91,4 % N; 83,67 % P; 87,40 K; 82,17 % Ca y 77,29 % Mg). Conclusión. Al inicio de la descomposición y liberación de nutrientes el aporte de estos al sistema se dio por la biomasa obtenida a partir de hojas y ramillas; sin embargo, conforme avanzó el tiempo el aporte se dio por la biomasa de ramas secundarias y primarias con una liberación más lenta de nutrientes.
Condiciones óptimas de análisis cinético en semen fresco de toros Brahman con un sistema CASA-Mot
Authors: Víquez Luis Gabriel , Barquero Vinicio , Valverde Anthony 
Published: September 2021

Introducción. Las condiciones óptimas de análisis seminal permiten estandarizar los protocolos de evaluación. Objetivo. Evaluar el efecto de factores externos relacionados con el seminograma sobre las subpoblaciones espermáticas de bovinos de la raza Brahman. Materiales y métodos. El estudio se realizó con animales de dos fincas ganaderas de Alajuela, Costa Rica, de septiembre a diciembre de 2019. Se utilizaron diez toros Brahman que fueron electroeyaculados y el semen se diluyó con tres diluyentes comerciales: Andromed®, Androstar® y BTS, a dos temperaturas (37 y 29 °C). Las muestras se analizaron mediante un sistema CASA-Mot ISAS®v1 y se utilizaron cámaras de recuento ISAS®D4C (10, 16 y 20 μm) y Spermtrack® en diferentes tiempos de análisis (0, 3, 6 y 12 h). Resultados. La Spermtrack® presentó mayor velocidad curvilínea pero menor linealidad respecto de las otras cámaras de recuento (p<0,05). La durabilidad de las muestras fue menor para todas las variables de cinética espermática (p<0,05), excepto para el índice de rectitud (STR). La velocidad curvilínea fue mayor cuando se utilizó Andromed®, pero hubo mayor progresividad con Androstar® (p<0,05). Se identificaron cinco subpoblaciones espermáticas a partir de tres componentes principales: velocidad, progresividad y ondulación. La distribución de espermatozoides en las subpoblaciones varió (p<0,05) según la durabilidad de la muestra y la cámara de recuento. Conclusiones. El tipo de diluyente, la temperatura de dilución, la cámara de recuento y el tiempo transcurrido tras la carga inicial del semen condicionaron las variables cinéticas del eyaculado. La movilidad y cinética del semen mejoró cuando se utilizaron alturas de cámara de 20 µm y diluyente Androstar®. La existencia de subpoblaciones espermáticas en el eyaculado se vio afectada por el tipo de diluyente utilizado, el cual condicionó la presencia de diferentes patrones de movilidad, progresividad y ondulación de las células en las diferentes subpoblaciones dentro del eyaculado.
Sistemas silvopastoriles: mitigación de gases de efecto invernadero, bosque seco tropical - Colombia
Authors: Contreras-Santos José Luis , Martinez-Atencia Judith , Raghavan Bindu , López-Rebolledo Leonardo , Garrido-Pineda Jeyson 
Published: September 2021

Introducción. Los sistemas silvopastoriles (SSP) juegan un papel destacado en la captura de carbono en el suelo y mitigación de gases de efecto invernadero. Objetivo. Cuantificar los servicios ecosistémicos ofrecidos por cuatro SSP en comparación con una pradera con gramíneas, en el valle medio del río Sinú, en Colombia. Materiales y métodos. Se midieron los flujos de metano y óxido nitroso mediante el uso de cámaras cerradas, durante un periodo de ocho semanas consecutivas (septiembre a noviembre, 2013). También se midió el carbono orgánico en el suelo a dos profundidades (0-5 y 5–15 cm), por el método de combustión y se determinaron variables fisicoquímicas del suelo. El diseño correspondió a bloques completos al azar con cinco tratamientos y tres repeticiones. Los tratamientos correspondieron a cuatro sistemas silvopastoriles conformados por diferentes componentes arbóreos: Tectona grandis (SSP1), Tabebuia rosea (SSP2), Pachira quinata (SSP3) y Acacia mangium (SSP4), en comparación a una pradera con solo gramínea (Megathyrsus maximus cv. Mombasa). Resultados. Los mayores contenidos de materia orgánica, fósforo y calcio se registraron dentro de los SSP. El carbono orgánico en el suelo (COS) fue mayor dentro de los SSP (39,43±15,34 t C ha-1) en comparación con la pradera (33,43±17,63 t C ha-1). Los SSP se comportaron la mayor parte del tiempo como sumideros de metano, al inmovilizar en promedio -460±0,42 µg CH4 m-2 h-1. Las menores tasas de emisión de óxido nitroso se evidenciaron dentro de los sistemas SSP1 y SSP2 (460±0,60 y 620±1,19 µg N2O m-2 h-1, respectivamente). Conclusión. La implementación de SSP contribuye en la disminución de procesos degradativos (físicos y químicos) del suelo, al aumento de las reservas de carbono del suelo y, por consiguiente, son una estrategia de mitigación de gases de efecto invernadero en los sistemas ganaderos.
Phase relations and thermomechanical properties of (Gd2Zr2O7)1−x(YbSZ)x based thermal barrier coatings (0 ≤ x ≤ 0.98)
Authors: Tabeshfar Mohadese , Salehi Mehdi , Dini Ghasem , He Jianying , Einarsrud Mari-Ann , Wiik Kjell 
Published: September 2021

Abstract
Doped Gd2Zr2O7 materials have interesting properties as thermal barrier coatings (TBC) to replace the YSZ topcoats traditionally used. Here we investigate the thermomechanical properties and phase relations of Gd2Zr2O7 (GZO) alloyed with 5 mol% Yb2O3 stabilized ZrO2 (YbSZ) in the composition range (Gd2Zr2O7)1−x(YbSZ)x, 0 ≤ x ≤ 0.98. With increasing YbSZ content, phase transformations from ordered to disordered pyrochlore to fluorite and tetragonal structures were observed. The thermal expansion coefficient (TEC) and Vickers hardness were correlated showing a maximum hardness (~ 11.5 GPa) and minimum TEC at x = 0.82. At 1000 °C, the TEC for the end members, x = 0 and 0.98, were 11.4 and 11.3 × 10–6 K−1, respectively. The fracture toughness, KIC, showed an average value around 1.5 MPa m0.5 for x ≤ 0.93 and increased significantly at x = 0.98 reaching 5.4 MPa m0.5 due to the presence of a ferroelastic phase. For TBC applications, compounds with x = 0.98 show promise due to high TEC and high KIC.

Graphic abstract
Fig. 5a summarize the most important results in the manuscript. Showing a significant increase in fracture toughness for compositions with x=0.98.
La creatividad performativa
Authors: Herrera Castiblanco Samuel Alberto 
Published: September 2021

En este artículo se discuten algunos planteamientos que constituyen la creatividad performativa, los cuales hacen parte de la tesis de doctorado “Umbrales de la Creatividad”. El abordaje metodológico cualitativo de tipo émico, posibilitó un discurso en torno a la “creatividad situada” como constructo social de conocimiento. Constituye un ejercicio de reflexión a partir de las retóricas que los Drag Queen utilizan para visibilizar su mundo. Nos habla, en particular, del estilo de Zaza-Drag, de su experiencia de mundo, de su condición humana y de la apariencia de los Zapatos Drag Queen. Explicita la naturaleza de la “jugada performativa” de Zaza-Drag (Drag Valeri-Zaza) en cuatro resultados: “entre lo público y lo privado”, “llamar la atención” y lo “sencillo pero exagerado”, derivando en la condición “evocativa y performativa de los Zapatos”.
Prognostic capabilities of proteomic analysis of seminal plasma in males with azoospermia
Authors: Brzhozovskiy A. G. , Starodubtseva N. L. , Bugrova A. E. , Kononihin A. S. , Chagovets V. V. , Shatylko T. V. , Gamidov S. I. , Tambiyev A. Kh. , Popova A. Yu. , Gasanov N. G. , Bitsoyev T. B. , Frankevich V. E. 
Published: September 2021

Introduction. According to research, seminal plasma is a rich source of biomarkers in male infertility including biomarkers of residual spermatogenesis in males with azoospermia. In many cases, extraction of seminal plasma does not require invasive procedures. Therefore, non-invasive test for identification of males with azoospermia and residual focal spermatogenesis can improve selection of patients for microdissection testicular sperm extraction (microTESE) and become a useful tool for patient consultation.The study objective is to evaluate capabilities of proteomic analysis of seminal plasma for identification of males with azoospermia and residual focal spermatogenesis in the testes who have higher chance for sperm extraction using the microTESE procedure.Materials and methods. Samples of seminal plasma of 36 males between 21 and 45 years of age (mean age 33.3 ± ± 3.9 years) were tested for proteomic composition. For proteomic analysis, proteins were hydrolyzed with trypsin. The obtained peptides were analyzed using chromatography-mass spectrometry complex composed of liquid chromatograph nano-HPLC Agilent 1100 and high-resolution mass spectrometer 7Т LTQ-FT Ultra. Proteomic analysis data were compared with results of the microTESE procedure.Results. In this study, proteomic composition of seminal plasma in azoospermia was assessed. Semi-quantitative analysis without markers using bottom-up approach identified 405 different proteins, and 174 of them were detected in all samples. The obtained quantitative parameters were sufficient to identify patients with focal spermatogenesis.Conclusion. Seminal plasma is a potential source of biological markers for prediction of sperm extraction success in patients with azoospermia. The presented results are preliminary, and further studies are needed to confirm the identified protein panel.
Combined antibiotic prophylaxis of infectious complications of prostate biopsy
Authors: Grigoryev N. A. , Abdullin I. I. , Gvasalia B. R. , Loginov A. V. , Zhilyaev E. V. 
Published: September 2021

Introduction. Biopsy of prostate is a routine urologic procedure. Nevertheless the frequency of infectious-inflammatory complications remain high, despite the recommended antibiotic prophylaxis schemes.Purpose. The evaluation of effectiveness and safety of combined antimicrobial prophylaxis: fosfomycin trometamol and fluoroquinolones of 3rd generation.Materials and methods. Our clinical study included 80 patients who underwent prostate biopsy were divided into 2 groups. The first group of 40 patients received routine prophylaxis: levofloxacin 500 mg 6 h before the biopsy and 500 mg per day during 4 days after biopsy. The second group of 40 patients, along with standard prophylaxis as in the first group, additionally after biopsy received fosfomycin trometamol 3 gr single-shot.Results. In the first group, infectious and inflammatory complications occurred in 8 (20 %) patients, 12.5 % of patients from the first group were hospitalized for parenteral antibiotic therapy. The average length of stay in hospital was 3.4 ± 1.45 days. In all cases, in the first group of patients, Escherichia coli was detected, in 70 % of cases fluoroquinolone-resistant strain of the bacterium was received. In the second group of patients no hospitalization was required. One (2.5 %) patient out of forty from this group showed signs of urinary tract infection, which was not accompanied by an increase of body temperature, as well as changes in blood and urine tests.Conclusions. Our results show good effectiveness and safety of combined antibiotic prophylaxis for transrectal prostate biopsy. Since fluoroquinolone resistance grows, it is necessary to introduce alternative schemes, as well as monitoring of nosocomial infection and controlling of antimicrobial therapy.
Luetic aortitis
Authors: Board Editorial 
Published: September 2021

Abstracts: a) Internal medicine.
Luetic aortitis according to E. Morgenstеrn'y (Munch, med. Wschr- No. 16, 1929) is diagnosed on the basis of the X-ray picture of expansion and lengthening of the aorta, strongly accentuated II tone on the aorta, systolic murmur on the aorta, subjective pain behind the sternum with irradiation to the left shoulder blade and to the left arm and Wasserman's reaction.
Chronicle
Authors: Board Editorial 
Published: September 2021

Chronicle.
22) At the end of January, Comrade M.F. Vladimirsky was appointed People's Commissar of Health of the RSFSR. 23) The Collegium of the People's Commissariat for Health decided to take a firm course towards the elimination of the private sector of medical care and private paid treatment. institutions. A list of medical positions has already been approved, the work of which is not compatible with the practice of private practice. This list includes doctors-administrators, heads of state medical institutions, doctors living on the territory to lay down. institutions, interns, graduate students, students of advanced training courses, sanitary and school sanitary doctors, forensic medical experts and doctors of places of detention, medical experts of the bureau of medical examination and bureaus of control commissions, all doctors working in the bodies of NK labor and insurance, doctors of rural precinct honey. institutions and home help in cities and workers' settlements, doctors of resort medical institutions and working in elective union or Soviet positions. For private lay down. institutions and private practitioners will establish increased public and departmental control. Institutions must strictly adhere to the priority of admission of the insured.
Distant motions from a building vibration test
Authors: Jennings Paul C. 
Published: September 2021

Abstract
Horizontal ground motion generated by vibration tests of the nine-story Millikan Library Building on the Caltech campus was recorded on the surface of the ground in the Pasadena area at distances up to 3 miles from the building. Later it was learned that the vertical component of the motion also was recorded by the seismograph on Mt. Wilson, 6.7 miles from the Library and 4,800 ft higher in elevation. The magnitude of the acceleration varied from 2.04 × 10-2g at the excitation level on the ninth floor of the building to 3.2 × 10-7g at Mt. Wilson. Simple calculations show that multistory buildings are particularly well-suited for inducing large dynamic forces in the ground with relatively small equipment.
Response envelope spectrum and interpretation of strong earthquake ground motion
Authors: Trifunac M. D. 
Published: September 2021

abstract
A multiple filter technique is developed using a single-degree-of-freedom lightly-damped oscillator as a narrow band-pass filter. It provides for a physically simple approach to the analysis of accelerograph records from the point of view of structural engineering.
The analysis of several typical accelerograph records indicates that a significant portion of strong earthquake ground motion consists of surface waves. It is concluded that the duration of intense shaking will be determined predominantly by the dispersion properties of the ground.
Focal mechanism and source depth of earthquakes from body- and surface-wave data
Authors: Canitez Nezihi , Nafi Toksöz M. 
Published: September 2021

abstract
The determination of focal depth and other source parameters by the use of first-motion data and surface-wave spectra is investigated. It is shown that the spectral ratio of Love to Rayleigh waves (L/R) is sensitive to all source parameters. The azimuthal variation of the L/R spectral ratios can be used to check the fault-plane solution as well as for focal depth determinations. Medium response, attenuation, and source finiteness seriously affect the absolute spectra and introduce uncertainty into the focal depth determinations. These effects are nearly canceled out when L/R amplitude ratios are used. Thus, the preferred procedure for source mechanism studies of shallow earthquakes is to use jointly the body-wave data, absolute spectra of surface waves, and the Love/Rayleigh spectral ratios. With this procedure, focal depths can be determined to an accuracy of a few kilometers.
Common features of the reservoir-associated seismic activities
Authors: Gupta Harsh K. , Rastogi B. K. , Narain Hari 
Published: September 2021

abstract
A detailed examination of the behavior of earthquakes associated with over a dozen artificial lakes shows that, in all cases, the tremors were initiated or their frequency increased considerably following the lake filling and that their epicenters were mostly located within a distance of 25 km from the lakes. Among the factors affecting the tremor frequency are the rate of increase of water level, duration of loading, maximum levels reached, and the period for which the high levels are retained. The study of these reservoir-associated earthquake sequences reveals that the ratio of the largest aftershock to the main shock is high (about 0.9), and the b values are also high in the frequency-magnitude relation, which is contrary to the normal earthquakes of the concerned regions.
THE PROBLEM SCIENTIFIC AND RESEARCH LABORATORY OF GEOGRAPHY AND SOIL CONSERVATION OF THE BLACK SOIL ZONE OF ODESSA NATIONAL UNIVERSITY (PSCL‑4 ONU) CELEBRATES50TH ANNIVERSARY!
Authors: Tsurkan O. I. , Buyanovskiy A. О. , Krasekha E. N. , Popelnytska N. O. 
Published: September 2021

Problem Statement and Purpose. The problem scientific and research laboratory of geography and soil conservation of the black soil zone (PSCL‑4 ONU) was opened at the Geology and Geography Faculty of Odessa University half a century ago, in 1971. The main task of the research laboratory resided in conducting soil researches in the steppe zone of the south of Ukraine in connection with the commencement of irrigation programs there, soil and land mapping to streamline their use. The aimof this article is to highlight the major milestones of the half-century history of the research laboratory, as well as outline achievements and research activities during this period.Data & Methods. Documents and materials on the history of formation and development of the PSCL‑4, documents and materials on the research activitiesduring 50 years, as well as the other author’s publications from the previous years. To highlight the half-century history of the PSCL a classic geographical and historical-and-research approaches has been applied, which combines the principlesof historical and analytical assessment of both: historical milestones and obtained achievements.Results. Starting from 1971 the soil sciences expedition of the PSCL4 conducted a large-scale(1:10000 and 1:25000) survey and mapping of soils of collective and state farms in the south of Ukraine, Russian Federation, North and Central Kazakhstanin the area of more than 6 mln. ha. PSCL4 staff has been studying the impact of waters of different irrigational quality on the chemical composition of the southern Ukrainian soils, as well as properties and productivity of these soils. There has beenestablished genetic nature and negative direction of a number of processes in the black soil under irrigation, there also have been justified and introduced into practice different measures to protect and increase fertility of soils under irrigation and drainage. In 2003 there have been commenced research and mapping of soils and soil cover on Zmiiny island. The studies of modern landscapes and soil-geochemical environments and processes on the estuary coasts in the Northwestern part of theBlack Sea region as well as city`s soil, are considered additionally in the research within recent years. Bearing in mind problems and topics the PSCL4 addressed during its long-term scientific and research activities there has been developed ascientific school – “Soil Formation Processes in Black Soils of the Steppe Zone.” Over half a century the department schooled 14 candidates and 3 doctors of sciences, published more books, scientific articles, scientific and practical recommendations, and training manuals.
The Development and Testing of the MISSCARE Survey OR
Authors: Kalisch Beatrice , McLaughlin Margaret , Marsh Valerie , Nguyen Lan , Talsma Akkeneel 
Published: September 2021

BackgroundAn acceptable, reliable, and valid survey instrument to measure missed nursing care in perioperative settings has not been developed.PurposeTo develop and conduct psychometric testing of the MISSCARE Survey OR.MethodsData were collected nationwide from 1,693 operating room (OR) nurses who completed the MISSCARE Survey OR. The survey contained two sections: Part A, “Elements of perioperative nursing care” (32 questions) and Part B, “Reasons for missing nursing care” (17 questions).ResultsThe MISSCARE Survey OR demonstrated acceptability, as few respondents missed questions in Part A (0.1%–1.1%) and Part B (0.8%–1.3%). Exploratory factor analysis revealed five subscales in Part A (Legal, Preparation, Safety, Communication, and Closing) and four in Part B (Urgency, Staffing, Materials, and Teamwork). In Part A, the five-factor solution explained 44% of the variance. In Part B, the four-factor solution explained 53% of the variance. Alpha coefficients for subscales in Part A ranged from 0.71 to 0.84 and 0.74 to 0.90 for Part B. Validity was measured using content validity, criterion validity, and construct validity. A panel of OR nurse experts established content validity. Criterion validity compared hospitals with fewer than six ORs to hospitals with hospitals with more than six ORs where it was hypothesized aprior that nurses in hospitals with fewer ORs would have missed less care (X = −.123, standard error [SE] = .041, p = .003). Construct validity was tested through exploratory and confirmatory factor analyses (CFA). Correlation coefficients for Part A ranged from 0.34 to 0.73 and 0.60 to 0.73 for Part B. Overall model fit was acceptable: goodness-of-fit index (GFI) and CFA were greater than 0.90, standardized root mean square residual (SMRM) was less than 0.06, and root mean square error of approximation (RMSEA) less than 0.08.ConclusionThe MISSCARE Survey OR promises to be a reliable, valid indicator of the extent of and reasons for missed nursing care.
A Critical Appraisal: Development and Use of Perceived Stress Scale in U.S. Immigrants
Authors: Zhao Meng , Lee Kyoung Eun , Huang Yuxia 
Published: September 2021

Background and PurposeFew studies have critically appraised Perceived Stress Scale (PSS) in immigrants. The purpose of the article is to determine if PSS is adequately developed and properly used with U.S. immigrants.MethodsSearching via PubMed and PsycINFO databases resulted in 10 research papers published between 2009 and 2019 that met the selection criteria and were integrated for this review.ResultsMost of the studies do not have adequate theoretical models and do not have proper consideration of socio-cultural factors. Five studies used the PSS translated into different languages but only one study validated the translated version. Six studies reported the reliability of the PSS. The PSS-14 and PSS-10 may be appropriately used in immigrants to measure psychological stress.ConclusionsSome issues, such as the PSS’s reliability and validity, need to be addressed in future use in immigrants.