310 research outputs found

    Regeneration of begonia plantlets by direct organogenesis

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    The economic importance of ornamentals worldwide suggests a bright future for ornamental breeding. Rapid progress in plant molecular biology has great potentials to contribute to the breeding of novel ornamental plants utilizing recombinant DNA technology. The plant cell, tissue or organ culture of many ornamental species and their regeneration are essential for providing the material and systems for their genetic manipulation, and this is therefore the first requirement of genetic engineering. In this research, different concentration of BA (0.0, 0.5, 1.0, 2.0 mgl(-1) with NAA ( 0.0, 0.5, 1.0 mgl(-1)) and BA (0.0, 0.5, 1.0, 2.0 mgl(-1)) with IAA ( 0.0, 0.5, 1.0, mgl(-1)) were investigated to optimize regeneration of Begonia elatior cv. Toran orange. The best regeneration and growth were obtained from the media containing 2.0 mgl(-1) BA and 1.0 mgl(-1) NAA (70%) followed by 1.0 mgl(-1) BA and 0.5 mgl(-1) NAA (50%), 1.0 mgl(-1) BA and 1.0 mgl(-1) NAA (20%) in BA - NAA combination. The media with BA - IAA combination showed that the best regeneration was 0.5 mgl(-1) BA and 0.5 mgl(-1) IAA (43%) followed by 0.5 mgl(-1) BA and 1.0 mgl(-1) IAA (23%)

    New realization of Chua's circuit and verification of chaos by harmonic balance analysis

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    Chua's circuit, which consists of two capacitors, one inductor, two resistors, one linear voltage-controlled voltage source (VCVS) and voltage-controlled current source (VCCS) type non-linear element has been realized by operational amplifiers. Various dynamical phenomena such as periodic orbit with periods T, 2T, and 4T, single scroll and double scroll similar to the Lorenz attractor have been observed experimentally by changing only the resistance value of the linear resistor R6. The experimental observations have been confirmed by computer simulations and also using harmonic balance analysis

    Anthropometric and Somatotype Characteristics of Top Elite Turkish National Jumpers

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    Introduction: This study aims to comprehensively investigate the anthropometric and somatotype characteristics of elite Turkish national jumpers specializing in high jump, long jump, pole vault, and triple jump disciplines. Recognizing the fundamental significance of body composition and somatotype in athletic performance, the research delves into the intricate interplay between these attributes, and competitive accomplishments. Methods: Leveraging a cohort of 13 national athletes, comprising six females and seven males, the methodology involves the application of standardized anthropometric measurements and the Heath-Carter method for somatotype assessment. Results: The outcomes illuminate distinct profiles, featuring lower body fat percentages in Turkish elite jumpers when compared to existing studies. Additionally, the study reveals gender-specific variations in muscle mass and discerns unique somatotype patterns within the cohort. Significantly, somatotype scores align with global trends observed in elite high jump athletes, emphasizing universal patterns among top-level performers. Comparative analyses with international studies further underscore commonalities in somatotype components among elite athletes. Furthermore, it was discerned that the top jumpers in both genders exhibited lower body height and body weight in comparison to their elite high-jumping counterparts. This research contributes to a refined understanding of the morphological intricacies associated with proficiency in these disciplines, offering valuable insights for optimizing training regimens. Conclusion: In summary, the study underscores the pivotal role played by anthropometric and somatotype characteristics in shaping the success of top elite Turkish national jumpers.Introducción: Este estudio tiene como objetivo investigar exhaustivamente las características antropométricas y somatotípicas de los saltadores nacionales turcos de élite especializados en las disciplinas de salto de altura, salto de longitud, salto con pértiga y salto triple. Al reconocer la importancia fundamental de la composición corporal y el somatotipo en el rendimiento deportivo, la investigación profundiza en la intrincada interacción entre estos atributos y los logros competitivos. Métodos: Aprovechando una cohorte de 13 atletas nacionales, compuesta por seis mujeres y siete hombres, la metodología implica la aplicación de mediciones antropométricas estandarizadas y el método Heath-Carter para la evaluación del somatotipo. Resultados: Los resultados iluminan distintos perfiles, que presentan porcentajes de grasa corporal más bajos en saltadores de élite turcos en comparación con los estudios existentes. Además, el estudio revela variaciones específicas de género en la masa muscular y distingue patrones de somatotipo únicos dentro de la cohorte. Significativamente, las puntuaciones de somatotipo se alinean con las tendencias globales observadas en los atletas de salto de altura de élite, enfatizando los patrones universales entre los deportistas de alto nivel. Los análisis comparativos con estudios internacionales subrayan aún más los puntos en común en los componentes del somatotipo entre los atletas de élite. Además, se discernió que los mejores saltadores de ambos sexos exhibían una altura y un peso corporal más bajos en comparación con sus homólogos de élite de salto de altura. Esta investigación contribuye a una comprensión refinada de las complejidades morfológicas asociadas con el dominio de estas disciplinas, ofreciendo información valiosa para optimizar los regímenes de entrenamiento. Conclusión: En resumen, el estudio subraya el papel fundamental que desempeñan las características antropométricas y somatotípicas en la configuración del éxito de los saltadores nacionales turcos de élite

    Mechanical regulation of cardiac development

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    Mechanical forces are essential contributors to and unavoidable components of cardiac formation, both inducing and orchestrating local and global molecular and cellular changes. Experimental animal studies have contributed substantially to understanding the mechanobiology of heart development. More recent integration of high-resolution imaging modalities with computational modeling has greatly improved our quantitative understanding of hemodynamic flow in heart development. Merging these latest experimental technologies with molecular and genetic signaling analysis will accelerate our understanding of the relationships integrating mechanical and biological signaling for proper cardiac formation. These advances will likely be essential for clinically translatable guidance for targeted interventions to rescue malforming hearts and/or reconfigure malformed circulations for optimal performance. This review summarizes our current understanding on the levels of mechanical signaling in the heart and their roles in orchestrating cardiac development

    Measurements of Gd 152 (p,γ) Tb 153 and Gd 152 (p,n) Tb 152 reaction cross sections for the astrophysical γ process

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    The total cross sections for the Gd152(p,γ)Tb153 and Gd152(p,n)152Tb reactions have been measured by the activation method at effective center-of-mass energies 3.47≤Ec.m.eff≤7.94 MeV and 4.96≤Ec.m.eff≤7.94 MeV, respectively. The targets were prepared by evaporation of 30.6% isotopically enriched Gd152 oxide on aluminum backing foils, and bombarded with proton beams provided by a cyclotron accelerator. The cross sections were deduced from the observed γ-ray activity, which was detected off-line by an HPGe detector in a low background environment. The results are presented and compared with predictions of statistical model calculations. This comparison supports a modified optical proton+Gd152 potential suggested earlier.Peer reviewedFinal Accepted Versio

    Anatomical evaluation of nasopalatine canal on cone beam computed tomography images

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    Background: Nasopalatine canal (NPC) (incisive canal) morphology is important for oral surgery techniques carried out on the maxilla, in the treatment of naso- palatine cyst, palatal pathologies that require a surgical intervention. Materials and methods: The morphology of NPC was classified in sagittal, coronal and axial planes on the cone beam computed tomography (CBCT). The length of NPC was found by measuring the distance between the mid-points of nasopalatine foramen and incisive foramen. The numbers, shapes and diameters of incisive and nasopalatine foramina were examined. Nasopalatine angle present between the NPC and the palate and anterior to the NPC was measured.  Results: In the sagittal plane, the shape of NPC was classified in six groups: 26.7% hourglass, 14.7% cone, 13.3% funnel, 16.0% banana, 28.7% cylindrical and 0.7% reverse-cone-shaped. In the coronal plane, shape of NPC was classified in three groups: 63.3% Y-shaped, 36.0% single canal, 0.7% double canal and external border of NPC was classified in four groups: 26.7% U, 28.7% Y, 44.0% V and 0.7% reverse-V-shaped. In the axial plane, the shape of nasopalatine foramen, incisive foramen and NPC at the mid-level was evaluated. The shape of the canal was detected as four types at three evaluated levels: round, oval, heart- and triangle-shaped. It was seen in every three axial planes that the round group is more than the others.  Conclusions: The morphological properties and variations of NPC should be con- sidered with a correct radiological evaluation so as to prevent the complications and improper practices in local anaesthesia, maxillary surgery and implant surgery practices. Especially dentists, otolaryngologist and plastic surgeons need to know the anatomy and variations of NPC.

    A High Throughput Lab-On-A-Chip System for Label Free Quantification of Breast Cancer Cells under Continuous Flow

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    This paper presents an LOC system combining microfluidic DEP channel with a CMOS image sensor for label and lens free detection and real-time counting of MCF-7 cells under continuous flow. Trapped and then released MCF-7 cells are accurately detected and counted under flow with a CMOS image sensor integrated underneath the DEP channel, for the first time in the literature. CMOS image sensor can capture 391 frames per second (fps) that allows detection of the released cells flowing through the channel with a flow rate up to 130 mu l/min (0.468 m/s). Therefore, the proposed system is able to detect the cells under high flow where conventional techniques for cell quantification such as fluorescent tagging become unusable. Detected cells are automatically counted with a computer program and the counting accuracy of the whole system is 95%. (C) 2016 The Authors. Published by Elsevier Ltd

    Measurements of proton induced reaction cross sections on 120Te for the astrophysical p-process

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    The total cross sections for the 120Te(p,gamma)121I and 120Te(p,n)120I reactions have been measured by the activation method in the effective center-of-mass energies between 2.47 MeV and 7.93 MeV. The targets were prepared by evaporation of 99.4 % isotopically enriched 120Te on Aluminum and Carbon backing foils, and bombarded with proton beams provided by the FN tandem accelerator at the University of Notre Dame. The cross sections and SS factors were deduced from the observed gamma ray activity, which was detected off-line by two Clover HPGe detectors mounted in close geometry. The results are presented and compared with the predictions of statistical model calculations using the codes NON-SMOKER and TALYS.Comment: 17 pages, 5 figures, 5 tables, regular articl
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