scholarly journals An extravascular fluid transport system based on structural framework of fibrous connective tissues in human body

2019 ◽  
Vol 52 (5) ◽  
Author(s):  
Hongyi Li ◽  
Chongqing Yang ◽  
Yajun Yin ◽  
Fang Wang ◽  
Min Chen ◽  
...  
Keyword(s):  
Transport System ◽  
Human Body ◽  
Fluid Transport ◽  
Connective Tissues ◽  
Structural Framework ◽  
Extravascular Fluid

Modeling of Human Reactions to Whole-Body Vibration

1987 ◽  
Vol 109 (3) ◽  
pp. 210-217 ◽  
Author(s):  
Farid M. L. Amirouche
Keyword(s):  
Human Body ◽  
Equations Of Motion ◽  
Vertical Direction ◽  
The Body ◽  
Whole Body ◽  
Connective Tissues ◽  
Finite Segment ◽  
Body Vibration ◽  
Forcing Function ◽  
Impulse Function

A computer-automated approach for studying the human body vibration is presented. This includes vertical, horizontal, and torsional vibration. The procedure used is based on Finite Segment Modeling (FSM) of the human body, thus treating it as a mechanical structure. Kane’s equations as developed by Huston et al. are used to formulate the governing equations of motion. The connective tissues are modeled by springs and dampers. In addition, the paper presents the transient response of different parts of the body due to a sinusoidal forcing function as well as an impulse function applied to the lower torso in the vertical direction.

scholarly journals The Lobster Optic Lamina

1966 ◽  
Vol 1 (3) ◽  
pp. 275-280
Author(s):  
J. HÁMORI ◽  
G. A. HORRIDGE
Keyword(s):  
Glial Cells ◽  
Transport System ◽  
Fluid Transport ◽  
Dark Light ◽  
Dark Cells ◽  
Extensive System ◽  
Structural Support ◽  
Synaptic Region ◽  
Extracellular Transport ◽  
Light Cells

There are 3 distinct types of glial cells in the optic lamina of the lobster: dark, light, and sheet cells, all distinguished from the neurons by being multipolar and not having dictyosomes. Dark cells are surrounded by intercellular material and together with light cells constitute a structural support for the groups of nerve cells. Light cells are also sheath cells for the neuron somata. The sheet cells have numerous flat processes which together form the 2 glial layers in which the synaptic region is sandwiched. An extensive system of extracellular cisterns between the sheet processes may serve for fluid transport towards the fibres and synapses, and the numerous vesicles in the sheet cells may represent an extension of the extracellular transport system.

scholarly journals Effects of Ambient Flow and Injury on the Morphology of a Fluid Transport System in a Bryozoan

2005 ◽  
Vol 208 (1) ◽  
pp. 47-59 ◽  
Author(s):  
Michelangelo von Dassow
Keyword(s):  
Transport System ◽  
Fluid Transport ◽  
Ambient Flow

Microleakage along Glassix glass fibre posts cemented with three different materials assessed using a fluid transport system

2006 ◽  
Vol 39 (5) ◽  
pp. 363-367 ◽  
Author(s):  
M. Rogic-Barbic ◽  
S. Segovic ◽  
S. Pezelj-Ribaric ◽  
J. Borcic ◽  
S. Jukic ◽  
...  
Keyword(s):  
Transport System ◽  
Glass Fibre ◽  
Fluid Transport ◽  
Glass Fibre Posts

scholarly journals Flow and conduit formation in the external fluid-transport system of a suspension feeder

2005 ◽  
Vol 208 (15) ◽  
pp. 2931-2938 ◽  
Author(s):  
M. von Dassow
Keyword(s):  
Transport System ◽  
Fluid Transport ◽  
Suspension Feeder ◽  
External Fluid

scholarly journals Characterizing Extravascular Fluid Transport of Macromolecules in the Tumor Interstitium by Magnetic Resonance Imaging

2005 ◽  
Vol 65 (4) ◽  
pp. 1425-1432 ◽  
Author(s):  
Arvind P. Pathak ◽  
Dmitri Artemov ◽  
B. Douglas Ward ◽  
David G. Jackson ◽  
Michal Neeman ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Fluid Transport ◽  
Resonance Imaging ◽  
Extravascular Fluid ◽  
Transport Of Macromolecules

scholarly journals Fluid-transport evaluation of lateral condensation, GuttaCore™ and continuous wave of obturation techniques

RSBO ◽  
2017 ◽  
Vol 13 (3) ◽  
pp. 171
Author(s):  
Daniel Silva-Herzog ◽  
Ezequiel Monroy ◽  
Verónica Méndez ◽  
Sandra Maria Alves Sayão Maia ◽  
Paulo Melo Júnior ◽  
...  
Keyword(s):  
Transport System ◽  
Fluid Transport ◽  
Continuous Wave ◽  
Positive Control ◽  
Control Group ◽  
Suitable Material ◽  
Root Canals ◽  
Nail Polish ◽  
Working Length ◽  
Apical Leakage

To achieve success in endodontic treatment, the root canal system should be as sealed as possible with suitable material such as gutta-percha and sealer. Objective: This study compare the apical leakage of roots obturated with GuttaCore™, lateral condensation, and continuous wave obturation through a computerized fluid-transport system. Material and methods: Fifty-two freshlyextracted upper molars were used. The disto-buccal roots were cut and standardized to 10 mm long. The root canals were prepared at working length with WaveOne primary reciprocating files. The specimens were randomly divided and filled by one of the following obturation techniques: GuttaCore™, lateral condensation or continuous wave obturation, using SILCO sealer. The positive controls were left unfilled and the negative controls were totally coated with cyanoacrylate and three layers of nail polish. The roots were stored in relative humidity for 72 h at 37°C, allowing the sealer to set. After this period, the roots were connected to a computerized fluid-transport system, and the apical leakage was analyzed. Results: The results were expressed in µL.cmH2O-1.min-1 x10-4 1.36 atm. The data were statistically analyzed using one-way ANOVA and Tukey´s tests. The specimens of the positive control group showed extreme amounts of apical leakage. There was no leakage in the negative ontrols. The statistical analysis indicated that continuous wave obturation and GuttaCore™ showed lower leakage than the lateral condensation technique (p<0.05). No difference was found among the continuous wave obturation and GuttaCore™ (p>0.05). Conclusion: Continuous wave obturation and GuttaCore™ showed lower leakage than the lateral condensation technique. There was no difference between the continuous wave obturation and GuttaCore™. The fluid-transport system used in this study allowed an accurate quantitative measurement of leakage using simpler equipment.

scholarly journals Fibrillin: from microfibril assembly to biomechanical function

2002 ◽  
Vol 357 (1418) ◽  
pp. 207-217 ◽  
Author(s):  
C. M. Kielty ◽  
C. Baldock ◽  
D. Lee ◽  
M. J. Rock ◽  
J. L. Ashworth ◽  
...  
Keyword(s):  
Connective Tissue ◽  
Structural Organization ◽  
Biological Function ◽  
Biomechanical Properties ◽  
Molecular Assembly ◽  
Connective Tissue Disorders ◽  
Connective Tissues ◽  
Structural Framework ◽  
Skeletal Defects ◽  
Microfibril Assembly

Fibrillins form the structural framework of a unique and essential class of extracellular microfibrils that endow dynamic connective tissues with long–range elasticity. Their biological importance is emphasized by the linkage of fibrillin mutations to Marfan syndrome and related connective tissue disorders, which are associated with severe cardiovascular, ocular and skeletal defects. These microfibrils have a complex ultrastructure and it has proved a major challenge both to define their structural organization and to relate it to their biological function. However, new approaches have at last begun to reveal important insights into their molecular assembly, structural organization and biomechanical properties. This paper describes the current understanding of the molecular assembly of fibrillin molecules, the alignment of fibrillin molecules within microfibrils and the unique elastomeric properties of microfibrils.

Role of atrial natriuretic peptide in systemic responses to acute isotonic volume expansion

1992 ◽  
Vol 73 (4) ◽  
pp. 1218-1226 ◽  
Author(s):  
D. E. Watenpaugh ◽  
C. W. Yancy ◽  
J. C. Buckey ◽  
L. D. Lane ◽  
A. R. Hargens ◽  
...  
Keyword(s):  
Atrial Natriuretic Peptide ◽  
Natriuretic Peptide ◽  
Fluid Transport ◽  
Urine Volume ◽  
Isotonic Saline ◽  
Volume Overload ◽  
Right Atrial ◽  
Fluid Loss ◽  
Extravascular Fluid ◽  
Atrial Natriuretic

Atrial natriuretic peptide (ANP) may activate multiple mechanisms that protect against circulatory volume overload. We hypothesized that a temporal relationship exists between increases in cardiac filling pressure and plasma ANP concentration and also between ANP elevation and vasodilation, fluid movement from plasma to interstitium, and increased urine volume (UV). We infused 30 ml/kg isotonic saline at 100 ml/min in seven supine male subjects and monitored responses for 3 h postinfusion. Right atrial pressure (RAP) was measured via a central catheter. ANP (pmol/l) was measured by radioimmunoassay. Transcapillary fluid transport (TFT) equaled infused volume minus UV, insensible fluid loss, and change in plasma volume (PV, measured with Evan's blue). Systemic vascular resistance (SVR) was calculated as (mean arterial pressure-RAP)/cardiac output (determined by acetylene rebreathing). Plasma oncotic pressure (OP) was measured directly. During infusion, mean TFT (+/- SE) increased from net reabsorption during control of 111 +/- 27 ml/h to net filtration of 1,219 +/- 143 ml/h (P < 0.01). At end infusion, mean RAP, heart rate, and PV exhibited peak increases of 146, 23, and 27%, respectively. Concurrently, SVR and OP achieved nadirs 29 and 31% below control, respectively. Mean plasma ANP and UV peaked (45 and 390%, respectively) at 30 min postinfusion. Systemic vasodilation and capillary filtration resulted from and compensated for infusion-induced circulatory pressure increases and hemodilution. By 1 h postinfusion, most cardiovascular variables had returned toward control levels, and net reabsorption of extravascular fluid ensued.(ABSTRACT TRUNCATED AT 250 WORDS)

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