Compaction Force
Mostrando 1-12 de 15 artigos, teses e dissertações.
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1. Stress Distribution in Graded Cellular Materials Under Dynamic Compression
Abstract Dynamic compression behaviors of density-homogeneous and density-graded irregular honeycombs are investigated using cell-based finite element models under a constant-velocity impact scenario. A method based on the cross-sectional engineering stress is developed to obtain the one-dimensional stress distribution along the loading direction in a cellul
Lat. Am. j. solids struct.. Publicado em: 2017-08
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2. Resistência mecânica do solo e força de tração em hastes sulcadoras de semeadoras-adubadoras em sistema de integração lavoura-pecuária / Mechanical resistance of soil and traction force by planter chisel type openers in crop-livestock system
A integração lavoura-pecuária, realizada mediante a implantação de pastagens no inverno e a semeadura de milho ou soja no verão, constitui-se numa alternativa para a diversificação de atividades e ampliação dos lucros. Animais em pastejo, principalmente em áreas agrícolas manejadas sob semeadura direta, podem resultar na compactação adicional d
Publicado em: 2010
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3. Influência da Natureza do Fosfato de Cálcio Dibásico Anidro na Qualidade de uma Forma Farmacêutica Sólida Manufaturada via Granulação Seca / Impact of the nature of anhydrous dibasic calcium phosphate on the quality of a pharmaceutical solid dosage form manufactured through dry granulation;
No presente trabalho foi estudado o impacto da natureza do fosfato de cálcio dibásico anidro (ADCP) na qualidade de uma forma farmacêutica sólida, denominada medicamento, manufaturada via granulação seca. O ADCP é uma das cinco matérias-primas que constituem o medicamento; Inicialmente, foi avaliada a natureza dos dois ADCPs estudados, aqui denominad
Publicado em: 2005
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4. H-NS mediated compaction of DNA visualised by atomic force microscopy
The Escherichia coli H-NS protein is a nucleoid-associated protein involved in gene regulation and DNA compaction. To get more insight into the mechanism of DNA compaction we applied atomic force microscopy (AFM) to study the structure of H-NS–DNA complexes. On circular DNA molecules two different levels of H-NS induced condensation were observed. H-NS ind
Oxford University Press.
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5. Dry granulation and compression of spray-dried plant extracts
The purpose of this research was to evaluate the influence of dry granulation parameters on granule and tablet properties of spray-dried extract (SDE) fromMaytenus ilicifolia, which is widely used in Brazil in the treatment of gastric disorders. The compressional behavior of the SDE and granules of the SDE was characterized by Heckel plots. The tablet proper
Springer-Verlag.
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6. Fast kinetics of chromatin assembly revealed by single-molecule videomicroscopy and scanning force microscopy
Fluorescence videomicroscopy and scanning force microscopy were used to follow, in real time, chromatin assembly on individual DNA molecules immersed in cell-free systems competent for physiological chromatin assembly. Within a few seconds, molecules are already compacted into a form exhibiting strong similarities to native chromatin fibers. In these ex
The National Academy of Sciences.
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7. Packaging of DNA by shell crosslinked nanoparticles.
We demonstrate compaction of DNA with nanoscale biomimetic constructs which are robust synthetic analogs of globular proteins. These constructs are approximately 15 nm in diameter, shell crosslinked knedel-like (SCKs) nanoparticles, which are prepared by covalent stabilization of amphiphilic di-block co-polymer micelles, self-assembled in an aqueous solution
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8. Study of the interaction of DNA with cisplatin and other Pd(II) and Pt(II) complexes by atomic force microscopy.
Modifications in the structure of a 260 bp DNA (hlyM) fragment from Escherichia coli caused by interaction with Pd(II) and Pt(II) complexes were studied. Cisplatin and transplatin [cis- and trans-PtCl2(NH3)2 respectively], Pt2Cl2(Spym)4 (Spym = 2-mercaptopyrimidine anion), Pd-famotidine and Pt-famotidine were incubated with DNA for 24 h at 37 degrees C and t
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9. Compaction of single DNA molecules induced by binding of integration host factor (IHF)
We studied the interaction between the integration host factor (IHF), a major nucleoid-associated protein in bacteria, and single DNA molecules. Force–extension measurements of λ DNA and an analysis of the Brownian motion of small beads tethered to a surface by single short DNA molecules, in equilibrium with an IHF solution, indicate that: (i) the DNA–I
The National Academy of Sciences.
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10. The Dynamics of Individual Nucleosomes Controls the Chromatin Condensation Pathway: Direct Atomic Force Microscopy Visualization of Variant Chromatin
Chromatin organization and dynamics is studied at scales ranging from single nucleosome to nucleosomal array by using a unique combination of biochemical assays, single molecule imaging technique, and numerical modeling. We show that a subtle modification in the nucleosome structure induced by the histone variant H2A.Bbd drastically modifies the higher order
The Biophysical Society.
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11. The 3-D model: Comparison of parameters obtained from and by simulating different tableting machines
The aim of this study is to apply 3-D modeling to data obtained from different tableting machines and for different compression wheels on a linear rotary tableting machine replicator. A new analysis technique to interpret these data by 3-D parameter plots is presented. Tablets were produced on an instrumented eccentric tableting machine and on a linear rotar
Springer-Verlag.
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12. Dual architectural roles of HU: Formation of flexible hinges and rigid filaments
The nucleoid-associated protein HU is one of the most abundant proteins in Escherichia coli and has been suggested to play an important role in bacterial nucleoid organization and regulation. Although the regulatory aspects of HU have been firmly established, much less is understood about the role of HU in shaping the bacterial nucleoid. In both functions (l
National Academy of Sciences.