cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.12094440.v1
title: Evaluation of the degradation of aggregates shape properties

description: ABSTRACT The aggregates shape properties (form, angularity, and surface texture) have an influence on the asphalt pavement surface texture, which is directly related to tire-pavement adhesion, to stability and to road safety. Due to the importance of studying these characteristics, this research has the main objective of evaluating the effect of aggregate degradation on their shape properties. In order to achieve this, the shape properties of aggregates with three different sizes were analyzed by means of traditional methods and also with the use of aDigital Image Processing (DIP) technique. These properties were analyzed with the use of the Aggregate Image Measurement System 2 (AIMS2), before and after the use of the Micro Deval (MD) and the Los Angeles abrasion equipment, besides the conventional test of uncompacted void content. The aggregates particles angularity values decreased during the degradation process for both equipment used in the analyses. The aggregates sphericity after the use of MD did not change significantly. This could be explained because smaller abrasive charges are used in this particular test. The surface texture evaluated after the Los Angeles abrasion test did not vary significantly, which can be explained due to the tendency of breakage during the test, a process that is more related changes in form conditions. Furthermore, the results showed that the aggregate size and the presence of water influenced the degradation processes of the aggregates. The combination of the characterization of aggregate shape properties by means of image techniques with the use of laboratorial mechanical processes that are capable of modifying these properties might be an adequate solution for the prediction of asphalt pavements performance in relation to adhesion loss throughout the time.
DOI: 10.6084/m9.figshare.12094437
title: Evaluation of the durability of concretes produced with recycled concrete aggregates using the two stage mixing approach

description: ABSTRACT The recycling of the mineral fraction of civil construction residues is seen as a source potential of generation of aggregates. The Recycled Concrete Aggregates (RCA) are generally indicated for using in the production of new concretes. However, due to the old mortar adhered to RCA, these have smaller specific mass and higher porosity when compared to the natural aggregate. In the seek of improving the quality of RCA, various techniques have being developed, being one of the alternatives through of surface modification. This study objectified to verify the effect of the substitution of 20% of natural coarse aggregate by RCA and to perform the surface modification of the RCA through the two stage mixing approach. The replacement of aggregates was performed maintaining the particle size distribution of the natural coarse aggregate. The RCA treatment was performed in the pre-wetting period with contents of 25 and 100% of Portland cement. It were performed tests to evaluate the behavior of concretes in relation to mechanical properties and durability parameters. It was evident that the utilization of 20% of RCA in the production of a new concrete produces negative effects on the evaluated properties when compared to conventional concrete. The treatment in the RCA though the two stage mixing approach with 25% of Portland cement provided improvement in the concrete when compared to the normal mixing approach. On the other hand, the two stage mixing approach with 100% of Portland cement impaired the concrete behavior. It was concluded that the two stage mixing approach with 25% of Portland cement showed as a viable alternative to provide improvements in the RCA. Besides resulting in a concrete with good characteristics of mechanical properties and durability, it also enables the utilization of recycled aggregates and it does not generates additional cost in the process of concrete production.
DOI: 10.6084/m9.figshare.12094428
title: Productivity and nutrition of fertigated açaí palms according to boron fertilization

description: Abstract Due to the increasing national and international demand, the cultivation of açaí palm trees (Euterpe oleracea Mart.) has expanded to upland areas in Brazil. Most of these areas present low natural soil fertility, in which boron (B) is one of the most limiting nutrients. This study aimed to evaluate the productivity of fresh fruits of fertigated açaí trees submitted to doses of B. The study was carried out in Tomé-Açu, northeastern Pará, Brazil. The experimental design consisted of randomized blocks with four treatments: control and addition of 20, 40 and 60 g of B clump-1. After 17 months, bunches of fresh fruits were collected and the production per hectare was estimated. An economic analysis was carried out considering the costs of fertilization and fruit production. The productivities obtained in the treatments were considered above the average of the municipality of Tomé-Açu. The estimated content of leaf B that provided the highest productivity was 14.9 mg kg-1, for a yield of 5479 kg ha-1 year-1¸ while the critical content corresponded to 13.2 mg kg-1. The highest productivity of fresh açaí fruits was achieved with the dose of 20 g of B clump-1, which provided a net gain of 42%.
DOI: 10.6084/m9.figshare.12094431
title: Nutritional status, production and fruit quality of west indian cherry fertigated with nitrogen and humic substance

description: Abstract Information on humic substances (HS) associated with nitrogen fertilization in West Indian cherry is scarce in the literature. The use of soil conditioners, such as HS, can increase the efficiency in the absorption of nutrients, especially N. Therefore, the present study aimed to evaluate, in two production cycles, the fruit quality, yield and nutritional status of West Indian cherry as a function of fertigation with nitrogen (N) and HS in Petrolina-PE, Brazil. The experimental design was in split plots, with treatments distributed in 5 x 2 strips, referring to N doses (50, 75, 100, 125 and 150% of the recommended dose) and HS application (without and with), respectively, with 4 replicates and 3 plants per plot. The N source used was urea (45% N) and the HS source used was the commercial product KS100 (Omnia®), from leonardite, monthly applied at dose of 6 g plant-1. Production, yield, indices of chlorophyll a, chlorophyll b and total chlorophyll, and leaf contents of N, P, K, Na, Ca, Mg, Fe, Mn and Zn were determined. Fruits were evaluated for: pH, vitamin C, soluble solids (SS), titratable acidity (TA) and SS/TA ratio. Except for leaf N content, which increased linearly with the applied doses, the leaf contents of nutrients, production and yield of West Indian cherry showed a stochastic pattern as a function of the increase in N availability and HS application. West Indian cherry plants cultivated and fertilized according to the recommendation for the crop did not respond to the evaluated treatments. Application of humic substances and N doses did not alter the post-harvest quality of West Indian cherry fruits.
DOI: 10.6084/m9.figshare.12094428.v1
title: Productivity and nutrition of fertigated açaí palms according to boron fertilization

description: Abstract Due to the increasing national and international demand, the cultivation of açaí palm trees (Euterpe oleracea Mart.) has expanded to upland areas in Brazil. Most of these areas present low natural soil fertility, in which boron (B) is one of the most limiting nutrients. This study aimed to evaluate the productivity of fresh fruits of fertigated açaí trees submitted to doses of B. The study was carried out in Tomé-Açu, northeastern Pará, Brazil. The experimental design consisted of randomized blocks with four treatments: control and addition of 20, 40 and 60 g of B clump-1. After 17 months, bunches of fresh fruits were collected and the production per hectare was estimated. An economic analysis was carried out considering the costs of fertilization and fruit production. The productivities obtained in the treatments were considered above the average of the municipality of Tomé-Açu. The estimated content of leaf B that provided the highest productivity was 14.9 mg kg-1, for a yield of 5479 kg ha-1 year-1¸ while the critical content corresponded to 13.2 mg kg-1. The highest productivity of fresh açaí fruits was achieved with the dose of 20 g of B clump-1, which provided a net gain of 42%.
DOI: 10.6084/m9.figshare.12094431.v1
title: Nutritional status, production and fruit quality of west indian cherry fertigated with nitrogen and humic substance

description: Abstract Information on humic substances (HS) associated with nitrogen fertilization in West Indian cherry is scarce in the literature. The use of soil conditioners, such as HS, can increase the efficiency in the absorption of nutrients, especially N. Therefore, the present study aimed to evaluate, in two production cycles, the fruit quality, yield and nutritional status of West Indian cherry as a function of fertigation with nitrogen (N) and HS in Petrolina-PE, Brazil. The experimental design was in split plots, with treatments distributed in 5 x 2 strips, referring to N doses (50, 75, 100, 125 and 150% of the recommended dose) and HS application (without and with), respectively, with 4 replicates and 3 plants per plot. The N source used was urea (45% N) and the HS source used was the commercial product KS100 (Omnia®), from leonardite, monthly applied at dose of 6 g plant-1. Production, yield, indices of chlorophyll a, chlorophyll b and total chlorophyll, and leaf contents of N, P, K, Na, Ca, Mg, Fe, Mn and Zn were determined. Fruits were evaluated for: pH, vitamin C, soluble solids (SS), titratable acidity (TA) and SS/TA ratio. Except for leaf N content, which increased linearly with the applied doses, the leaf contents of nutrients, production and yield of West Indian cherry showed a stochastic pattern as a function of the increase in N availability and HS application. West Indian cherry plants cultivated and fertilized according to the recommendation for the crop did not respond to the evaluated treatments. Application of humic substances and N doses did not alter the post-harvest quality of West Indian cherry fruits.
DOI: 10.6084/m9.figshare.12094419
title: [Effect of docosahexaenoic acid and Trolox® in extenders for cooling semen from Mangalarga Marchador stallion]

description: ABSTRACT The objective of this study was to evaluate the effect of docosahexaenoic acid (DHA), associated or not with Trolox®, in extenders for cooling semen from Mangalarga Marchador stallions. Ten ejaculates were cooled in the following diluents: D1) BotuSemen® (BS; control); D2) BS + 30ngmL-1 DHA (BS30DHA); D3) BS30DHA + 40μM Trolox® (BS30DHA40T); D4) BS + 50ngmL-1 DHA (BS50DHA); D5) BS50DHA + 40μM Trolox® (BS50DHA40T). After 48 hours of refrigeration, the sperm movement, structural and functional integrity of the plasma membrane and sperm longevity were evaluated. All extenders tested similarly preserved motility, linearity, straightness of trajectory, amplitude of lateral head displacement, beat cross frequency, hyperactive, the structural and functional integrity of the sperm membrane (P&gt; 0.05). The BS50DHA extender was superior to BS30DHA40T in preserving VCL and VSL and was superior to BS30DHA40T and BS50DHA40T in preserving VAP and oscillation index (P&lt; 0.05). It is concluded that the use of Trolox® in extenders for cooling stallion sperm containing docosahexaenoic acid at the proposed concentrations is not indicated because it alters sperm movement parameters considered important for fertility.
DOI: 10.6084/m9.figshare.12094422
title: [Bone allografts and synthetic grafts hydroxyapatite on ulnar bone defect in fowl (Gallus gallus domesticus), radiographic and histological aspects]

description: ABSTRACT Of the orthopedic visits performed on birds at HCV-UFRGS, 86% are fractures, and approximately 30% of them are comminuted with expressive bone loss, justifying the importance of the use of grafts in bird fractures. The objective of this work was to test two allografts and a synthetic HADC graft on finishing in Gallus gallus domesticus. 30 laying hens were used, divided in three groups: frozen allograft in ultrafreezer (UFG); frozen allograft in liquid nitrogen (LNG); calcium deficient synthetic hydroxyapatite graft (HAG). The three graft groups were exposed to serial radiographs until the 90 postoperative days, as well as the histological examination at the end of the experiment were: LNG 61.67±21.79 days (90% consolidation), UFG 47.14±13.50 days (70% consolidation) and HAG 70±18.17 days (60% consolidation). There was a significant difference in bone healing time between GUF and GHA. Histologically, GUF grafts were the ones that were in the most advanced consolidation. LNG allografts were superior in filling ulnar bone failure of fowl.
DOI: 10.6084/m9.figshare.12094419.v1
title: [Effect of docosahexaenoic acid and Trolox® in extenders for cooling semen from Mangalarga Marchador stallion]

description: ABSTRACT The objective of this study was to evaluate the effect of docosahexaenoic acid (DHA), associated or not with Trolox®, in extenders for cooling semen from Mangalarga Marchador stallions. Ten ejaculates were cooled in the following diluents: D1) BotuSemen® (BS; control); D2) BS + 30ngmL-1 DHA (BS30DHA); D3) BS30DHA + 40μM Trolox® (BS30DHA40T); D4) BS + 50ngmL-1 DHA (BS50DHA); D5) BS50DHA + 40μM Trolox® (BS50DHA40T). After 48 hours of refrigeration, the sperm movement, structural and functional integrity of the plasma membrane and sperm longevity were evaluated. All extenders tested similarly preserved motility, linearity, straightness of trajectory, amplitude of lateral head displacement, beat cross frequency, hyperactive, the structural and functional integrity of the sperm membrane (P&gt; 0.05). The BS50DHA extender was superior to BS30DHA40T in preserving VCL and VSL and was superior to BS30DHA40T and BS50DHA40T in preserving VAP and oscillation index (P&lt; 0.05). It is concluded that the use of Trolox® in extenders for cooling stallion sperm containing docosahexaenoic acid at the proposed concentrations is not indicated because it alters sperm movement parameters considered important for fertility.
DOI: 10.6084/m9.figshare.12094422.v1
title: [Bone allografts and synthetic grafts hydroxyapatite on ulnar bone defect in fowl (Gallus gallus domesticus), radiographic and histological aspects]

description: ABSTRACT Of the orthopedic visits performed on birds at HCV-UFRGS, 86% are fractures, and approximately 30% of them are comminuted with expressive bone loss, justifying the importance of the use of grafts in bird fractures. The objective of this work was to test two allografts and a synthetic HADC graft on finishing in Gallus gallus domesticus. 30 laying hens were used, divided in three groups: frozen allograft in ultrafreezer (UFG); frozen allograft in liquid nitrogen (LNG); calcium deficient synthetic hydroxyapatite graft (HAG). The three graft groups were exposed to serial radiographs until the 90 postoperative days, as well as the histological examination at the end of the experiment were: LNG 61.67±21.79 days (90% consolidation), UFG 47.14±13.50 days (70% consolidation) and HAG 70±18.17 days (60% consolidation). There was a significant difference in bone healing time between GUF and GHA. Histologically, GUF grafts were the ones that were in the most advanced consolidation. LNG allografts were superior in filling ulnar bone failure of fowl.
DOI: 10.6084/m9.figshare.12094407
title: Presenteeism and associated factors in industry workers

description: Abstract Introduction: presenteeism can be defined as being at work despite perceiving limitations, physical or psychological, which can reduce the work ability. Objectives: to estimate presenteeism prevalence and its association with socio-demographic characteristics, life styles, work and interpersonal relational aspects and general health conditions in industry workers in Bahia, Brazil. Methods: presenteeism was measured by the sum of positive responses to questions about lack of motivation, lack of concentration, and indisposition or discouragement to work, along with negative absenteeism. In the multivariate analysis, we used the Poisson model with robust variance to estimate the associations magnitude by means of the prevalence ratio. Results: among the 2,093 workers whose data were analyzed, be under 30 years of age, having higher education, feel pain, having poor sleep quality, feeling stressed and experiencing negative feelings about life were associated with higher prevalence of presenteeism. Conclusion: presenteeism can lead to a progressive worsening of the worker’s health, so early identification and promoting interventions to reduce its determinants is a challenge for organizations.
DOI: 10.6084/m9.figshare.12094380
title: HEMODYNAMIC RESPONSE AFTER CONCURRENT CROSS EXERCISE IN HYPERTENSIVE WOMEN

description: ABSTRACT Introduction: Systemic arterial hypertension is a disease that mainly affects women. Objective: This study aimed to verify the hypotensive effect and blood pressure reactivity in women submitted to a concurrent cross exercise (CC) session. Methods: Fifteen volunteers (54±3) performed aerobic exercise alternated with a series of weights exercises, for the analysis of blood pressure variation (by the oscillometric method) and pressure reactivity (by the Cold pressure test) before and after exercise. Results: The results demonstrated the occurrence of post-exercise hypotension in the systolic phase in the comparison between CC and C post-exercise (−11.65 mmHg). CC led to attenuation of 7mmHg and 4mmHg for SBP and DBP, respectively, in the blood pressure reactivity after one session. Conclusion: It is concluded that concurrent cross exercise ensures hypotension and positive reactivity of systolic blood pressure. Level of evidence II; Therapeutic studies-Investigating the results of treatment.
DOI: 10.6084/m9.figshare.12094368
title: Red cabbage (Brassica oleracea L.) extract reverses lipid oxidative stress in rats

description: Abstract Red cabbage (Brassica oleracea L. var. capitata f. rubra DC.) extract has been demonstrated hypolipidemic and antioxidant capacity. Herein, we investigated the effect of red cabbage aqueous extract (RC) or fenofibrate (FF) in oxidative stress induced by Triton WR-1339 in rats. The antioxidant capacity was evaluated through the superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GSH-Px) activities and, thiobarbituric reactive species (TBARS) and protein carbonyl (PC) levels in erythrocytes, liver, kidneys, cerebral cortex and hippocampus of male rats. The alterations promoted by Triton WR-1339 in enzymatic antioxidant defense in the liver, kidneys and hippocampus were reversed by RC or FF treatments. The TBARS and PC levels increased in the liver, cerebral cortex and hippocampus of hyperlipidemic rats were decreased by the treatments with RC or FF. These findings demonstrated that RC is a potential therapy to treat diseases not only involving dyslipidemic condition but also oxidative stress.
DOI: 10.6084/m9.figshare.12094374
title: DURATION AND QUALITY OF SLEEP IN SPRINT AND RECOVERY PERFORMANCES AMONG ELITE SWIMMERS

description: ABSTRACT Introduction: Circadian rhythms can impact athletes' sports performance, where the plateau occurs between 15 and 21 hours. Swimming is a peculiar case, as athletes perform training and final sessions in competitions at different times, as in the Rio2016 Olympic Games for example, where the semifinal and final competitions took place from ten o'clock at night. Objectives: (1) to present the protocol of an intervention performed with elite athletes of the Brazilian swimming team during the 2016 Olympic Games in Rio; (2) to find out whether the time at which the competitions were held affected the swimming performances of these athletes during the competition. Materials and Methods: Fourteen athletes of the Brazilian swimming team (males: n= 10; 71% and females: n= 4; 29%) participated in the study. They were followed up during two preparation periods (baseline and intervention) for the 2016 Olympic Games in Rio during June and July 2016. During the competition, we recorded the Reaction Time (RT) and Competition Time (CT) of each athlete in different modalities. The intervention strategies used were light therapy and sleep hygiene. The values of RT at the starting block and CT were registered and conferred with the official results. Results: The athletes showed a decrease in the total time awake (Δ = −13%; Effect size [ES] = 1.0) and sleep latency (Δ = −33%; ES = 0.7), and an increase in total sleep time (Δ = 13%; ES = 1.1; p = 0.04) between the baseline and the period of the intervention, pre-competition. We identified an improvement in the RT (Δ = −2.2% to −1.0%; ES = 0.2 to 0.5) during the competition only for the athletes who participated in the competition finals. Conclusion: We conclude that the intervention carried out was effective in mitigating any negative influence of competition time on the RT and CT of elite athletes of the Brazilian swimming team. Level of evidence II; Prospective comparative study.
DOI: 10.6084/m9.figshare.12094380.v1
title: HEMODYNAMIC RESPONSE AFTER CONCURRENT CROSS EXERCISE IN HYPERTENSIVE WOMEN

description: ABSTRACT Introduction: Systemic arterial hypertension is a disease that mainly affects women. Objective: This study aimed to verify the hypotensive effect and blood pressure reactivity in women submitted to a concurrent cross exercise (CC) session. Methods: Fifteen volunteers (54±3) performed aerobic exercise alternated with a series of weights exercises, for the analysis of blood pressure variation (by the oscillometric method) and pressure reactivity (by the Cold pressure test) before and after exercise. Results: The results demonstrated the occurrence of post-exercise hypotension in the systolic phase in the comparison between CC and C post-exercise (−11.65 mmHg). CC led to attenuation of 7mmHg and 4mmHg for SBP and DBP, respectively, in the blood pressure reactivity after one session. Conclusion: It is concluded that concurrent cross exercise ensures hypotension and positive reactivity of systolic blood pressure. Level of evidence II; Therapeutic studies-Investigating the results of treatment.
DOI: 10.6084/m9.figshare.12094362
title: Application of queueing models with abandonment for Call Center congestion analysis

description: Abstract This paper studies and applies queueing systems to Call Centers regarding the possibility of customer abandonment from the system before being served due to their impatience in waiting for a service. Call Centers are service organizations that predominantly serve customers via phone calls. One of the main concerns in managing them is to provide quality service at a minimum cost. Noticing the quality of services offered is expressed by customers, for example by abandonment from the queue. This paper shows that the M/M/c+G analytical queueing models with abandonment, with patience time represented by generic distributions (particularly mixed distributions), are more effective than the M/M/c+M analytical queueing models with abandonment, with Exponential patience, commonly used to evaluate congestion problems in Call Centers and support sizing and operational decisions in these systems. We conducted a study using data extracted from a Bank Call Center located in Israel and the parameters and some performance measures are determined based on this data. These sampling measures are compared with the same measures achieved by the M/M/c+M and M/M/c+G analytical queueing models considered in this research, which use parameters obtained empirically and the mixed and non-mixed distributions based on Exponential and Lognormal to represent user patience. An experimental discrete simulation model was also used to explore an alternative scenario, showing the potential of using the approaches based on analytical models with abandonment for Call Center analysis.