نتایج جستجو برای: compaction force

تعداد نتایج: 197424  

2016
Raphael Pilo Zvi Metzger Tamar Brosh

AIM To precisely quantify the circumferential strains created along the radicular dentin of maxillary incisors during a simulated clinical procedure of lateral compaction. METHODS Six miniature strain gauges were bonded on the roots of fourteen recently extracted maxillary central incisors that were subjected to root canal instrumentation. The strain gauges were bonded at three levels (apical...

2017
Pezhman Kazemi Mohammad Hassan Khalid Ana Pérez Gago Peter Kleinebudde Renata Jachowicz Jakub Szlęk Aleksander Mendyk

Dry granulation using roll compaction is a typical unit operation for producing solid dosage forms in the pharmaceutical industry. Dry granulation is commonly used if the powder mixture is sensitive to heat and moisture and has poor flow properties. The output of roll compaction is compacted ribbons that exhibit different properties based on the adjusted process parameters. These ribbons are th...

Journal: :Biophysical journal 2003
David I Shreiber Victor H Barocas Robert T Tranquillo

Current models used in our laboratory to assess the migration and traction of a population of cells within biopolymer gels are extended to investigate temporal changes in these parameters during compaction of mechanically constrained gels. The random cell migration coefficient, micro (t) is calculated using a windowing technique by regressing the mean-squared displacement of cells tracked at hi...

2013
Arpit Mishra Manika Vij Dhirendra Kumar Vibha Taneja Anupam Kumar Mondal Ankur Bothra Vivek Rao Munia Ganguli Bhupesh Taneja

The bacterial chromosomal DNA is folded into a compact structure called as 'nucleoid' so that the bacterial genome can be accommodated inside the cell. The shape and size of the nucleoid are determined by several factors including DNA supercoiling, macromolecular crowding and nucleoid associated proteins (NAPs). NAPs bind to different sites of the genome in sequence specific or non-sequence spe...

2010
Botao Xiao Reid C. Johnson John F. Marko

HU is one of the most abundant proteins in bacterial chromosomes and participates in nucleoid compaction and gene regulation. We report experiments using DNA stretching that study the dependence of DNA condensation by HU on force, salt and HU concentration. Previous experiments at sub-physiological salt levels revealed that low concentrations of HU could compact DNA, whereas larger HU concentra...

2015
Tural Aksel Elizabeth Choe Yu Shirley Sutton Kathleen M. Ruppel James A. Spudich

Cardiomyopathies due to mutations in human β-cardiac myosin are a significant cause of heart failure, sudden death, and arrhythmia. To understand the underlying molecular basis of changes in the contractile system's force production due to such mutations and search for potential drugs that restore force generation, an in vitro assay is necessary to evaluate cardiac myosin's ensemble force using...

Journal: :تحقیقات مهندسی کشاورزی 0
مجتبی نادری بلداجی دانشجوی دکتری پردیس کشاورزی و منابع طبیعی دانشگاه تهران رضا علیمردانی استاد دانشکده مهندسی بیوسیستم پردیس کشاورزی و منابع طبیعی دانشگاه تهران احمد طباطبایی فر استاد دانشکده مهندسی بیوسیستم پردیس کشاورزی و منابع طبیعی دانشگاه تهران احمد شریفی استادیار پژوهش مؤسسه تحقیقات فنی و مهندسی کشاورزی

soil compaction is an important aspect of agriculture and different methods are available to measure this parameter. one method is called the cone index; measuring the force required per unit area for penetration of a standard steel cone into the ground. cone penetrometers are used for cone index measurement. in this study, a tractor mounted, hydraulically-operated penetrometer was designed, bu...

Journal: :Sustainability 2021

In order to provide a new method study the migration behavior of coarse aggregates in compaction process asphalt mixtures, “Intelligent Aggregate Attitude Acquisition System (IAS)” is developed based on 3D printing technology and wireless intelligent sensing technology, (IAA)” prepared as acquisition terminal. The Superpave Gyratory Compaction (SGC) test Internet Things (IOT) sensor are combine...

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