bluuebunny/crossref_metadata_2025_split huggingface dataset:
Collagen as a Potential Biomaterial in Biomedical Applications
Authors: Muthukumar T. , Sreekumar G. , Sastry T.P. , Chamundeeswari M. 
Published: April 2019

AbstractCollagen, a biopolymer finds its application in the preparation of pharmaceutical products that are used in wound management, ophthalmic, orthopaedic and oral surgeries. This wide applicability is due its special properties such as biodegradability, biocompatibility, easy availability and high versatility. Collagen is isolated from various sources such as bovine skin, fish skin, chicken skin, skin waste of marine organisms, solid wastes of leather industry, short tendons of slaughtered cattle and bone. The isolated collagen from biological wastes is found to be cost effective due to the adaptation of simple methods for its isolation when compared with other commercially available biological macromolecules. The functional groups such as amino and carboxylic acid present in collagen helps in its modification that suits for various end uses which include wound healing, ophthalmic defects, drug delivery and tissue engineering applications. These beneficial properties impart uniqueness to collagen molecule among the available bio molecules.
Recent Advances in Porous Silicon Based Optical Biosensors
Authors: Maniya Nalin H. 
Published: April 2019

Abstract
PSi structures have unique physical and optical properties, which are being exploited for a numerous biomedical applications including biosensing, bioimaging, tissue engineering, and drug delivery. Different PSi optical structures can be fabricated to improve the sensitivity of the optical measurements. A very high surface area per volume of PSi can be used for the higher loading of target analytes in a small sensor area, which helps in increasing sensitivity and allows the miniaturization of biosensor. The specificity of PSi biosensor to the target analyte can be inferred by immobilizing the corresponding bioreceptor such as DNA, enzyme, or antibody via different conjugation chemistries. Finally, PSi is biocompatible material that offers additional advantage in comparison to other sensing platforms for in vivo implantable biosensing applications. This paper reviews fabrication, surface modification, biofunctionalization, and optical biosensing applications of PSi structures with special emphasis on in vivo and PSi photonic particles biosensing.
Current Progressand Future Prospective of Perovskite Solar Cells: A comprehensive Review
Authors: Kumari N. , Patel S. R. , Gohel J. V. 
Published: April 2019

Abstract
In the present study, a topical review of recent advances in the perovskite solar cell (PSC) is discussed in detail. Organolead halide perovskite materials have many qualities to make them suitable for the fabrication of low solar cells. High absorption coefficient, long charge carrier diffusion length, low temperature processing and ambipolar behaviour are the main advantages of perovskite materials. The efficiency of the perovskite solar cell is considerably increased from 3.9-22.1%since 2009. In the present review, firstly, the fundamentals and progress in the field of PSC are discussed. The types and structures of PSC are also discussed. Three are four main layers (electron transport layer (ETL), photo-active layer (perovskite layer), the hole transport layer (HTL) and the back contact (the counter electrode)) present in PSC structure. Each and every layer has their importance and it plays an important role to make a low cost solar cell. So study is also focused on the ETL/HTL free PSC. Although the efficiency of PSC is increasing every year, the reproducibility, stability and large scale production are the main challenges. So, the use of mixed cations in active layer to enhance the power conversion efficiency (PCE) and stability of PSC are also discussed in detail. Pb-free PSCs are also discussed rigorously to make harmless PSC. The processing cost of metal electrode deposition in PSC is very costly. So, the replacement of the metal electrode by some other low cost counter electrode is discussed comprehensively in the present review. Lastly, some future research scope of PSC is also discussed.
Studies on the Superplasticity Effect in UFA: History and Development (In Memory of Prof. O.A. Kaibyshev)
Authors: Valiev Ruslan Z. , Salishchev Gennady A. , Utyashev Farid Z. , Langdon Terence G. 
Published: April 2019

Abstract
Prof. O.A. Kaibyshev initiated studies on superplasticity of metals and alloys in Ufa in the 70s-80s of the last century. These studies gave momentum to the development of fundamental and applied studies on superplasticity not only in Russia but in numerous laboratories around the world. This paper highlights the major results of this early work and considers their state-of-the-art and development perspectives for the science and practice of materials superplasticity.
Manufacturing of the Aluminum Metal-Matrix Composite Reinforced with Micro- and Nanoparticles of Tio2 Through Accumulative Roll Bonding Process (Arb)
Authors: Yousefian Razieh , Emadoddin Esmaeil , Baharnezhad Sadreddin 
Published: April 2019

Abstract
The aluminum metal-matrix composites reinforced with the micro- and nanoparticles of TiO2 were manufactured in the form of sheets through the accumulative roll bonding (ARB) process which has been lately considered as a novel method under an intense plastic deformation so as to produce particulate-reinforced metal-matrix composites. Themicrostructural examinations via optic microscopy and scanning electron microscopy (SEM) depict that the distribution of TiO2 particles in the aluminum matrix is almost uniform and also the dispersion of the microparticles of TiO2 is more homogeneous than that of the nanoparticles one. Furthermore, the tensile tests demonstrate the noteworthy enhancements in the tensile strengths of the composites, compared to the Al 1100 as the virgin metal, however, by attenuating the size of the particles, i.e. from micron to nano, the composite tensile strengths are augmented. The fractographic analysis of the fracture surfaces revealed that the fracture mode in the ARB-processed Al/TiO2 composite is the shear ductile rupture type.
Characteristics of Silicone Composites for High Voltage Insulations
Authors: Khan Hidayatullah , Amin Muhammad , Ahmad Ayaz 
Published: April 2019

AbstractSilicone rubber (SiR) composites have been widely used for high voltage (HV) electrical and non-electrical applications for the last three decades. To increase the long-term performance of SiR composites under diverse environmental, mechanical and electrical stresses; detailed characterization and aging analysis is required. This review article presents a comprehensive survey on SiR composites that are used in HV applications. Particular emphasis is on silicon (Si) applications, chemistry, polymerization, silicone rubber properties enhancement by addition of fillers, composite materials, engineering requirements of polymer insulants, overview of high voltage (HV) electrical insulators and their aging. In addition, this review article includes appropriate discussions concerning the influence of fillers (micro/nano-sized) on the physical, thermal, mechanical and electrical properties of base polymer. Tensile strength, elongation at break, hardness, thermal degradation, dielectric strength, surface resistivity, volume resistivity, tracking/erosion resistance, partial discharge and water immersion resistance of SiR composites are analyzed. Finally, it was inferred that in order to diversify the SiR blends with micro/nano fillers and optimize their properties for particular applications further research work must be conducted.
A Model of Enhanced Strain Rate Sensitivity in Nanocrystalline and Ultrafine-Grained Metals
Authors: Sheinerman A.G. , Bobylev S.V. 
Published: April 2019

Abstract
A model is suggested that describes enhanced strain rate sensitivity of nanocrystalline and ultrafine-grained metals. Within the model, plastic deformation of such metals incorporates dislocation transmission across grain boundaries (GBs) in the stress fields of dislocation pileups, the emission of individual dislocations from GBs as well as GB sliding accommodated by GB dislocation climb and/or Coble creep. The model predicts a strong increase in the strain rate sensitivity and a decrease in the activation volume with decreasing grain size, in accord with experimental data.We also considered the effect of GB sliding and Coble creep on the anomalous dependence of the activation volume on temperature observed in nanocrystalline Ni. It is demonstrated that although an account for GB sliding and Coble creep leads to the appearance of cusps in the temperature dependence of the activation volume, these mechanisms alone cannot be responsible for the observed anomalous dependence of the activation volume on temperature.
Structural Characterization of Movpe Grown Algan/Gan for Hemt Formation
Authors: Popok V.N. , Aunsborg T.S. , Godiksen R.H. , Kristensen P.K. , Juluri R.R. , Caban P. , Pedersen K. 
Published: April 2019

Abstract
Results on structural, compositional, optical and electrical characterization of MOVPE grown AlGaN/GaN heterostructures with focus on understanding how the AlN buffer synthesis affects the top films are reported. The study demonstrates very good correlation between different methods providing a platform for reliable estimation of crystalline quality of the AlGaN/GaN structures and related to that electrical performance which is found to be significantly affected by threading dislocations (TD): higher TD density reduces the electron mobility while the charge carrier concentration is found to be largely unchanged. The attempt to vary the ammonia flow during the AlN synthesis is found not to affect the film composition and dislocation densities in the following heterostructures. An unusual phenomenon of considerable diffusion of Ga from the GaN film into the AlN buffer is found in all samples under the study. The obtained results are an important step in optimization of AlGaN/GaN growth towards the formation of good quality HEMT structures on sapphire and transfer of technology to Si substrates by providing clear understanding of the role of synthesis parameter on structure and composition of the films.
The Effect of Heat Treatment on the Optical Properties of Copper-Containing Lithium-Potassium-Borate Glasses
Authors: Shirshnev P.S. , Ugolkov V.L. , Snezhnaia Zh.G. , Panov D.I. , Shirshneva-Vaschenko E.V. , Lipnitskaya S.N. , Romanov A.E. , Bougrov V.E. 
Published: April 2019

Abstract
The paper presents the investigation of lithium-potassium-alumoborate glasses (0- 25 mol.% Li2O) doped by copper ions. The effect of glass annealing on the Raman scattering patterns is discussed. It is shown that such an annealing results in drastic changes in the Raman scattering patterns for the glass with 10 mol.%of Li2O: the band at 481 cm-1 conventionally attributed to boron-oxygen bonds in metaborate rings disappears, while a set of narrow bands at 1236, 1500, and 1783 cm-1 is observed. We consider one of these bands, 1783 cm-1, as being the identifier of the formed Li(Al7B4O17) nanophase, XRD analysis supported the above suggestion. The effect of newly formed nanophase on the luminescence spectra is discussed.
Plastic Deformation Micromechanism in Nanotwinned Films
Authors: Skiba N.V. 
Published: April 2019

Abstract
A theoretical model is suggested which describes micromechanism of the plastic deformation in nanotwinned metallic film formed by electrical deposition onto metallic substrate. In the framework of the model, the micromechanism of the plastic deformation is widening of nanoscale twins due to migration of twin boundaries. The energy and stress characteristics of the twin widening are calculated.
Calculating Endogenous and Exogenous Exergy Destruction for an Experimental Turbojet Engine
Authors: Ekici Selcuk , Orhan İlkay , Şöhret Yasin , Altuntaş Önder , Karakoç T. Hikmet 
Published: April 2019

Abstract
Thermodynamic analysis that provides the status and amount of irreversibility is a powerful tool to determine performance parameters of energy conversion systems. However, specifying the location and amount of irreversibility of a system or component does not reveal the full extent of the relationship of the irreversibility between component-component/component-system. Therefore, splitting the exergy destruction into endogenous and exogenous parts provides detailed information on the relationship of the irreversibility between component-component/component-system. The purpose of this paper is to identify the endogenous and exogenous parts of exergy destruction of an experimental turbojet engine (Unmanned Aerial Vehicle Turbojet – UAVT). Test data used for exergy analysis were evaluated at the maximum load of the experimental turbojet engine which consisted of a compressor, a combustion chamber and a turbine. As a result of the endogenous and exogenous parts of the exergy destruction, the majority of the total exergy destruction (15.1416 kW) was calculated as the endogenous part of exergy destruction (13.5473 kW), and the exogenous exergy destruction rate was calculated to be 1.5943 kW in the compressor component of the turbojet engine. In this study, the endogenous and exogenous exergy destruction amounts of other components are also presented in details.
Volume increments of some pseudohalide anions
Authors: Reckeweg Olaf 
Published: April 2019

AbstractBasic values for the volume increments are calculated for pseudohalide anions such as N3−, CN−, OCN−, SCN−and C(CN)3−using Biltz’s methods and Biltz volumes for monoatomic cations. The results are compared within the cohort and with the reported data for halide anions and for N(CN)2−.
Acute Kinematic Effects of Sprinting With Motorized Assistance
Authors: Clark Kenneth , Cahill Micheál , Korfist Christian , Whitacre Tyler 
Published: April 2019

Abstract
Clark, K, Cahill, M, Korfist, C, and Whitacre, T. Acute kinematic effects of sprinting with motorized assistance. J Strength Cond Res 35(7): 1856–1864, 2021—Although assisted sprinting has become popular for training maximum velocity, the acute effects are not fully understood. To examine this modality, 14 developmental male sprinters (age: 18.0 ± 2.5 years, 100-m personal best: 10.80 ± 0.31 seconds) performed maximal trials, both unassisted and assisted with a motorized towing device using a load of 7 kg (9.9 ± 0.9% body mass). Significant increases in maximum velocity (+9.4%, p ≤ 0.001, d = 3.28) occurred due to very large increases in stride length (+8.7%, p ≤ 0.001, d = 2.04) but not stride rate (+0.7%, p = 0.36, d = 0.11). Stride length increased due to small changes in distance traveled by the center of mass during ground contact (+3.7%, p ≤ 0.001, d = 0.40) combined with very large changes in distance traveled by the center of mass during flight (+13.1%, p ≤ 0.001, d = 2.62). Although stride rate did not demonstrate significant between-condition differences, the combination of contact and flight time was different. Compared to unassisted sprinting, assisted sprinting caused small but significant decreases in contact time (−5.2%, p ≤ 0.001, d = 0.49) and small but significant increases in flight time (+3.4%, p < 0.05, d = 0.58). Sprinting with motorized assistance elicited supramaximal velocities with decreased contact times, which may represent a neuromuscular stimulus for athletes attempting to enhance sprinting performance. Future research is needed to investigate the effects of this modality across various assistive loads and athletic populations, and to determine the longitudinal efficacy as a training method for improving maximum-velocity sprinting performance.
Comparison of Velocity-Based and Traditional Percentage-Based Loading Methods on Maximal Strength and Power Adaptations
Authors: Dorrell Harry F. , Smith Mark F. , Gee Thomas I. 
Published: April 2019

Abstract
Dorrell, HF, Smith, MF, and Gee, TI. Comparison of velocity-based and traditional percentage-based loading methods on maximal strength and power adaptations. J Strength Cond Res 34(1): 46–53, 2020—This study explored the effects of velocity-based training (VBT) on maximal strength and jump height. Sixteen trained men (22.8 ± 4.5 years) completed a countermovement jump (CMJ) test and 1 repetition maximum (1RM) assessment on back squat, bench press, strict overhead press, and deadlift, before and after 6 weeks of resistance training. Participants were assigned to VBT or percentage-based training (PBT) groups. The VBT group's load was dictated through real-time velocity monitoring, as opposed to pretesting 1RM data (PBT). No significant differences were present between groups for pretesting data (p > 0.05). Training resulted in significant increases (p < 0.05) in maximal strength for back squat (VBT 9%, PBT 8%), bench press (VBT 8%, PBT 4%), strict overhead press (VBT 6%, PBT 6%), and deadlift (VBT 6%). Significant increases in CMJ were witnessed for the VBT group only (5%). A significant interaction effect was witnessed between training groups for bench press (p = 0.004) and CMJ (p = 0.018). Furthermore, for back squat (9%), bench press (6%), and strict overhead press (6%), a significant difference was present between the total volume lifted. The VBT intervention induced favorable adaptations in maximal strength and jump height in trained men when compared with a traditional PBT approach. Interestingly, the VBT group achieved these positive outcomes despite a significant reduction in total training volume compared with the PBT group. This has potentially positive implications for the management of fatigue during resistance training.
Influence of Resistance Training Exercise Order on Muscle Strength, Hypertrophy, and Anabolic Hormones in Older Women: A Randomized Controlled Trial
Authors: Tomeleri Crisieli M. , Ribeiro Alex S. , Nunes João Pedro , Schoenfeld Brad J. , Souza Mariana F. , Schiavoni Durcelina , Junior Paulo S. , Cavaglieri Cláudia R. , Cunha Paolo M. , Venturini Danielle , Barbosa Décio S. , Cyrino Edilson S. 
Published: April 2019

Abstract
Tomeleri, CM, Ribeiro, AS, Nunes, JP, Schoenfeld, BJ, Souza, MF, Schiavoni, D, Junior, PS, Cavaglieri, CR, Cunha, PM, Venturini, D, Barbosa, DS, and Cyrino, ES. Influence of resistance training exercise order on muscle strength, hypertrophy, and anabolic hormones in older women: a randomized controlled trial. J Strength Cond Res 34(11): 3103–3109, 2020—The purpose of this study was to analyze the effects of resistance training (RT) exercise order on muscle strength, hypertrophy, and anabolic hormones in older women. Forty-four older women were randomly assigned to 1 of 3 groups: a nonexercise control group (CON, n = 15) and two RT groups that performed a 12-week RT program in a multijoint to single-joint order (MJ-SJ, n = 14), or in a single-joint to multijoint order (SJ-MJ, n = 15). The RT protocol (3×/week) encompassed 8 exercises, with 3 sets of 10–15 repetitions performed per exercise. One repetition maximum tests were used to evaluate muscle strength; dual-energy X-ray absorptiometry was used to estimate lean soft tissue. Both training groups showed significant and similar increases in muscle strength (MJ-SJ = 16.4%; SJ-MJ = 12.7%) and mass (MJ-SJ = 7.5%; SJ-MJ = 6.1%), whereas there were no significant changes in testosterone and insulin-like growth factor 1. The results suggest that both approaches are similarly effective in eliciting morphofunctional improvements in older women.
Nutrient solution salinity effect of greenhouse melon (Cucumis melon L. cv. Néctar)
Authors: Dias Nildo Da Silva , Morais Patrícia Lígia Dantas de , Sarmento José Darcio Abrantes , Sousa Neto Osvaldo Nogueira de , Palácio Vilauba Sobreiro , Freitas Jair José Rabelo de 
Published: April 2019

In Mossoró-RN, which is part of the semi-arid region of Brazil, a large part of the country’s melon production is concentrated, whose great potential is currently limited by water quality due to salt concentration. Therefore, the objective of this work was to investigate the use of saline nutritive solutions in the irrigation of greenhouse melon (Cucumis melo L. cv. Néctar) culture in coconut fiber. The experiment was carried out using a randomized block design with a 5 x 2 factorial arrangement, with four replications, where the treatments consisted of nutritivesolutions with five salinity levels (1.25 - control, 1.43, 1.86; 2.96 and 4.86 dS m-1) and for two different times to evaluate fruit quality parameters (at harvest and after 12 days of storage). Increasing the salinity in the nutrient solution reduces fruits’ mean weight, while total yield is only reduced with EC above 3.5 dS m-1. Fruit length anddiameter and peel and pulp thickness, SS and pH, decrease when submitted to nutrient solution with EC above 3.8 dS m-1. The peel and pulp thickness, pulp internal cavity, firmness, SS, pH, TA and fruit SS/TA ratio were influenced by the storage period.
Periods of interference by Cyperus esculentus L. in Pennisetum purpureum Schum.
Authors: Brighenti Alexandre Magno , Fernandes-Oliveira Maurílio 
Published: April 2019

Interference from weeds directly affects the productivity and the quality of elephant grass (Pennisetum purpureum) fodder. The difficulty in controlling weed species is one of the primary limitations to the production and use of elephant grass as forage in dairy farming and for biomass production in energy generation. The objective ofthis study was to determine the different periods in which yellow nutsedge (Cyperus esculentus) interfered with elephant grass forage yield. Two field experiments were conducted using a randomized complete block design with four replicates in Valença, Rio de Janeiro State, Brazil. Elephant grass and weeds were maintained togetherfor increasing periods of time: 0, 14, 28, 42, 56 and 70 days after planting (DAP) (experiment 1). The plants were kept free of competition with weekly hand hoeing after each period. The elephant grass crop used in experiment 2 was kept free of weeds for the same periods of time. The weeds that emerged after these intervals were notcontrolled further to the end of the experiment. The elephant grass coexisted with C. esculentus up to 23 days after planting with no loss in yield, which corresponded to the period before interference. The total period of preventing interference was 42 DAP, and the critical period of preventing interference extended from 23 to 42 days after planting (DAP)
Effect of gamma radiation and pasteurization on the shelf-life of juçara pulp (Euterpe edulis)
Authors: Silva Paula Porrelli Moreira da , Martin José Guilherme Prado , Spoto Marta Helena Fillet 
Published: April 2019

Several studies about juçara palm fruit (Euterpe edulis) have emphasized its high antioxidant capacity. However, there is a lack of studies comparing the effects of conservation technologies on the physicochemical and sensory quality of juçara pulp. This work aimed at evaluating the effects of gamma radiation (60Co) and pasteurization process on the physicochemical and sensory quality of juçara pulp. The irradiated (2.5 ± 0.06 kGy) and pasteurized (80°C/5 minutes) pulps were stored at 6°C, 90% RH, for 30 days (3 periods of analysis) and were analyzed for their microbiological, physicochemical (titratable acidity, soluble solids content, color, phenolic compounds, anthocyanin content, polyphenol oxidase and peroxidase activity) and sensory parameters (acceptance test. The physicochemical results were submitted to ANOVA for the ‘F’ test and the statistical difference of averages (P < 0.05) was determined by the Tukey’s test. The results of the sensory analysis were submitted to Principal Component and Cluster Analysis. The gamma radiation did not show satisfactory results in the preservation of juçara pulp since there was a significant decrease in total phenolics and anthocyanin content. The pasteurized pulp maintained its physicochemical and sensory characteristics during storage. Therefore, we recommend the pasteurization as a good conservation technique to this kind of product, which presented a shelf-life of around 15 days