Abstract：
:Aggregation of human red blood cells (RBCs) induced by dextrans of various molecular weight has been studied by using a new ultrasonic interferometry method. This method, based on A-mode echography, allowed for the measurement of the accumulation rate of particles on a solid plate which is related to their sedimentation rate (i.e., to their mean size). The initial aggregation process, the mean and the maximum sedimentation rate of aggregates and the packing of the sedimented RBCs have been investigated. Effects of hematocrit, molecular weight of dextrans and inhibition by dextran 40 on the RBC aggregation induced by dextran of higher molecular weight have been determined by analysing variations of the aggregate size. Results obtained confirm the aggregation effect of dextrans of molecular weights equal or higher than 70,000 dalton and disaggregation effect of dextran 40,000 dalton on aggregation by dextrans of higher molecular weight.
journal_name
Biorheologyjournal_title
Biorheologyauthors
Razavian SM,Guillemin MT,Guillet R,Beuzard Y,Boynard Mdoi
10.3233/bir-1991-281-209subject
Has Abstractpub_date
1991-01-01 00:00:00pages
89-97issue
1-2eissn
0006-355Xissn
1878-5034journal_volume
28pub_type
杂志文章相关文献
BIORHEOLOGY文献大全abstract：:Flow-induced changes in the red cell microstructure of human blood are identified from mechanical and optical evidence. On initiation of steady flow, a new microstructure develops as the shear strain increases through unit strain. This structure is identified with the formation of layers of red cells that slide on pla...
journal_title：Biorheology
pub_type： 杂志文章
doi：10.3233/bir-1994-31206
更新日期：1994-03-01 00:00:00
abstract：:Different methods are commonly used to study the red blood cell aggregation phenomenon. The major interest of the ultrasonic method presently discussed is to assess the mean size of red blood cell (RBC) aggregates by measuring ultrasonic intensity backscattered by blood. Applying Rayleigh theory of sound to blood medi...
journal_title：Biorheology
pub_type： 杂志文章
doi：10.3233/bir-1990-27104
更新日期：1990-01-01 00:00:00
abstract：:Mechanical forces can stimulate the production of extracellular matrix molecules. We tested the efficacy of ultrasound to increase proteoglycan synthesis in bovine primary chondrocytes. The ultrasound-induced temperature rise was measured and its contribution to the synthesis was investigated using bare heat stimulus....
journal_title：Biorheology
pub_type： 杂志文章
doi：
更新日期：2006-01-01 00:00:00
abstract：:Stress relaxation in three varieties of cherries was studied using the penetration test with a cylindrical pin, 4 mm in diameter, having a flat tip. One half of the fruit was modified by partial skinning, since experiments show that skin approximately doubles the apparent modulus of elasticity of the cherries. The ski...
journal_title：Biorheology
pub_type： 杂志文章
doi：10.1016/s0006-355x(97)00033-4
更新日期：1996-11-01 00:00:00
abstract：:The maintenance of articular cartilage integrity requires a balance between anabolic and catabolic processes which are under the control of chondrocytes. These cells are living in an anaerobic environment and normally do not divide. They are responsible for the continuous maintenance of the cartilage extracellular mat...
journal_title：Biorheology
pub_type： 杂志文章,评审
doi：
更新日期：2000-01-01 00:00:00
abstract：:A rigidity index (RI) related to red blood cell deformability was measured by using the hemorheometre. The RI for 13 patients homozygous for sickle cell disease was 109 +/- 44 at 37 degrees C and at atmospheric pO2. The filtration time curve as a function of pO2 is biphasic for sickle cell suspensions. The pO2 at whic...
journal_title：Biorheology
pub_type： 杂志文章
doi：10.3233/bir-1989-26409
更新日期：1989-01-01 00:00:00
abstract：:Skeletal muscle tissue is highly susceptible to sustained compressive straining, eventually leading to tissue breakdown in the form of pressure sores. This breakdown begins at the cellular level and is believed to be triggered by sustained cell deformation. To study the relationship between compressive strain-induced ...
journal_title：Biorheology
pub_type： 杂志文章
doi：
更新日期：2003-01-01 00:00:00
abstract：BACKGROUND:Osteoarthritis is a common, localized joint disease that causes pain, stiffness and reduced mobility. Osteoarthritis is particularly common in the knees. The effects of osteoarthritis on the rheology of synovial fluid in the knees are not fully understood and consequently require further study. OBJECTIVE:Th...
journal_title：Biorheology
pub_type： 杂志文章
doi：10.3233/BIR-15078
更新日期：2016-11-09 00:00:00
abstract：:The rheological properties of the vitreous body of the eye are believed to be a function of composition and to differ among species, as well as to vary regionally within the vitreous. These properties are essential to the mechanical functioning of the eye. Although there are gross, qualitative data on vitreous rheolog...
journal_title：Biorheology
pub_type： 杂志文章
doi：10.3233/bir-1992-295-612
更新日期：1992-09-01 00:00:00
abstract：:The electrical properties of red blood cell (RBC) suspensions are influenced by flow conditions, and prior studies indicate that electrical properties may reflect the kinetics of RBC aggregation. Changes of conductance and capacitance were monitored and had a time course resembling a "syllectogram" (i.e., temporal cha...
journal_title：Biorheology
pub_type： 杂志文章
doi：10.3233/BIR-2009-0541
更新日期：2009-01-01 00:00:00
abstract：:Ciliary metachronism and motility were examined optically in muco-ciliary tissue cultures from three different systems: a) frog's palate epithelium, b) frog's oesophagus, and c) human nasal polyps. In addition, lateral cilia of Mytilus edulis (water transporting cilia) were examined. It was revealed that the degree of...
journal_title：Biorheology
pub_type： 杂志文章
doi：10.3233/bir-1990-273-433
更新日期：1990-01-01 00:00:00
abstract：:Flow-dependent concentration or depletion of atherogenic low density lipoproteins which has been theoretically predicted to occur at a blood/endothelium boundary may play an important role in the genesis, progression, and regression of atherosclerosis in man and intimal hyperplasia in vascular grafts implanted in the ...
journal_title：Biorheology
pub_type： 杂志文章
doi：
更新日期：1999-01-01 00:00:00
abstract：:The aim of this study was to investigate the effect of hydrostatic pressure on the expression of messenger ribonucleic acid (mRNA) for specific extracellular matrix proteins in chondrocytes. Chondrocytes obtained from bovine metatarsophalangeal joints were embedded in cylindrical 2% agarose gels. A novel experimental ...
journal_title：Biorheology
pub_type： 杂志文章
doi：
更新日期：2003-01-01 00:00:00
abstract：:In micropipette experiments with small capillaries and moderate high pressure difference (approximately 1000 Pa) cell fragmentation (fission) of human red blood cells without hemolysis was observed by TV-system for a large number of fresh red blood cells of different donors. After separation, the fragment moves away f...
journal_title：Biorheology
pub_type： 杂志文章
doi：10.3233/bir-1987-24302
更新日期：1987-01-01 00:00:00
abstract：:The Cell Transit Analyser (CTA) provides a means to rapidly measure the deformability of large numbers of individual cells. It combines many of the advantages of micropipette studies with the simplicity and speed of filtrometry methods by measuring the duration of each resistive pulse generated as a cell passes throug...
journal_title：Biorheology
pub_type： 杂志文章
doi：10.3233/bir-1992-292-301
更新日期：1992-03-01 00:00:00
abstract：:In normal male rabbits loaded dietary cholesterol, intravital-microscopy revealed a marked acceleration of intravascular adhesiveness of white blood cells and aggregability of red blood cells and a swarming of lipid-laden macrophages in connective tissue space concurrently with a systemic hyperlipidemia and anemia. Po...
journal_title：Biorheology
pub_type： 杂志文章
doi：10.3233/bir-1988-251-242
更新日期：1988-01-01 00:00:00
abstract：:Through cardiac looping during embryonic development, human and other vertebrate hearts adopt sinuous curvatures with marked changes in direction of flow at atrial, ventricular and arterial levels. We used magnetic resonance phase velocity mapping to study flow through the hearts of resting volunteers, and Doppler ult...
journal_title：Biorheology
pub_type： 杂志文章
doi：
更新日期：2002-01-01 00:00:00
abstract：:In channel flow of multicomponent suspensions, segregation behavior of suspended components perpendicular to the flow direction is often observed, which is considered to be caused by the differential properties of the lateral migration depending on their shape, size, flexibility, and other characteristics. In the pres...
journal_title：Biorheology
pub_type： 杂志文章
doi：10.3233/BIR-130638
更新日期：2013-01-01 00:00:00
abstract：:There have been few reports describing the effects of mechanical loading on the metabolism of meniscal cells. The aim of this study was to investigate the effects of hydrostatic pressure on meniscal cell metabolism. Human meniscal cells were cultured in alginate beads for 3 days. They were then subjected to 4 MPa hydr...
journal_title：Biorheology
pub_type： 杂志文章
doi：
更新日期：2006-01-01 00:00:00
abstract：:While not generally viewed as physiologically significant in articular cartilage, substantial tension can develop in fibrocartilage structures and in articular cartilage injuries. This study examined how different amplitudes of cyclic tension influence chondrocyte matrix synthesis. Bovine articular chondrocytes seeded...
journal_title：Biorheology
pub_type： 杂志文章
doi：
更新日期：2004-01-01 00:00:00
abstract：:A fine structure of blood flow through a curved vessel with an aneurysm was studied in in vitro experiments in relation to rheological factors of arterial diseases such as arteriosclerosis or thrombosis. On the basis of the in vivo data related to cerebral circulation, red blood cell suspension was flowed through curv...
journal_title：Biorheology
pub_type： 杂志文章
doi：10.3233/bir-1984-21418
更新日期：1984-01-01 00:00:00
abstract：:It is widely accepted that whilst exhibiting clinically useful anti-inflammatory and analgesic activity, the application of non-steroidal anti-inflammatory drugs (NSAIDs) does not affect the underlying pathogenesis of articular diseases such as rheumatoid arthritis. The demonstration of a role for COX-2 in the resolut...
journal_title：Biorheology
pub_type： 杂志文章,评审
doi：
更新日期：2002-01-01 00:00:00
abstract：:The literature review about the shear linear properties of brain tissue reveals both a large discrepancy in the existing data and a crucial lack of information at high frequencies associated with traffic road and non-penetrating ballistic impacts. The purpose of this study is to clarify and to complement the linear ma...
journal_title：Biorheology
pub_type： 杂志文章
doi：
更新日期：2005-01-01 00:00:00
abstract：:Human red cell aggregability and disaggregability represent important hemorheological parameters of blood. Several techniques have been proposed to evaluate the tendency of red cells to form aggregates and to disrupt in the presence of shear stress. One of the most recent approaches is based on the characterization of...
journal_title：Biorheology
pub_type： 杂志文章
doi：10.3233/bir-1993-305-615
更新日期：1993-09-01 00:00:00
abstract：:Shear stress-induced platelet aggregation requires von Willebrand factor (vWF), platelet glycoprotein (GP) Ib, GPIIb-IIIa, Ca2+, and adenosine diphosphate (ADP). Recent reports using vWF labeled with either 125I or fluorescein isothiocyanate (FITC) have demonstrated that in shear-fields, vWF binds to both GPIb and GPI...
journal_title：Biorheology
pub_type： 杂志文章
doi：10.1016/S0006-355X(97)00004-8
更新日期：1997-01-01 00:00:00
abstract：:The structure of pulsatile flow in a rigid aortic bifurcation model was studied by means of a flow visualization technique and three-dimensional laser-Doppler anemometry. The model was made of glass, having the same shape as that of the average human aortic bifurcation. It was installed into a mock circulatory loop th...
journal_title：Biorheology
pub_type： 杂志文章
doi：10.3233/bir-1995-32104
更新日期：1995-01-01 00:00:00
abstract：:It is has been known for more than 80 years that compared to in vitro determinations, blood behaves as a less viscous fluid under in vivo flow conditions. The experiments of Whittaker and Winton were among the first dealing with the in vivo effects of altered blood rheology, and experimental studies during the second ...
journal_title：Biorheology
pub_type： 杂志文章,评审
doi：
更新日期：2008-01-01 00:00:00
abstract：:Nonlinear mathematical techniques now make it possible to quantify the complexity of an irregular time series through calculation of a parameter known as fractal dimension. In the present study, we use such an analysis to provide evidence that histamine-induced pressure oscillations in an isolated rabbit ear resistanc...
journal_title：Biorheology
pub_type： 杂志文章
doi：10.3233/bir-1993-305-605
更新日期：1993-09-01 00:00:00
abstract：:The compressive stiffness of an elastic material is traditionally characterized by its Young's modulus. Young's modulus of articular cartilage can be directly measured using unconfined compression geometry by assuming the cartilage to be homogeneous and isotropic. In isotropic materials, Young's modulus can also be de...
journal_title：Biorheology
pub_type： 杂志文章
doi：
更新日期：2004-01-01 00:00:00
abstract：:The goal of this study was to determine the duration of time that ligaments from a study group need to be loaded in order to adequately determine their collective viscoelastic behavior. Rat ligaments were subjected either to creep or stress relaxation for 1,000 s or stress relaxation for 10,000 s to compare estimates ...
journal_title：Biorheology
pub_type： 杂志文章
doi：
更新日期：2003-01-01 00:00:00
