Strength loss profiles

The production of compliant absorbable films with modulated absorption and strength loss profiles to allow for their use in a wide range of applications as vascular devices or components — more specifically the use of these devices in sealing punctured blood vessels (Chapter 10)... 

Biosyn sutures are synthetic absorbable monofilaments. Biosyn has a strength-loss profile that is shorter or longer than absorbable braids. Biosyn copolymer is based on a two-step process. The first block is a random PTMC/PDO oqxilymer while die end blocks are random PGA/PDO copolymers [7]. 

The observed wide range of strength and mass loss profiles among the available absorbable sutures is attributable not only to the chemical differences but also to a variety of intrinsic and extrinsic factors applicable, such as pH, electrolytes, stress, temperature, sterilization, superoxide. 

Keywords Degradation mechanism Hydrolytic degradation Autocatalytic degradation Bulk erosion Surface erosion Strength and mass loss profile Critical device dimension Hydrolysis... 

Spacer fabric, 19 Spider silk, 56 Sterilization techniques, 46 Strength and mass loss profile, 7 Surface erosion, 8 SynBiosys, 29... 

Nevertheless, these models ean often be highly aeeurate in predicting mass loss and temperature profiles in a composite section, and latterly strength loss, to the extent that they are sufficient for most practical applications, e.g. Kandare et al. [57]. 

In Eq. (II), Cjj is the concentration of species i in the /th source and Sj is the source strength for source j (e.g., as mass m ) contributed by particles from that particular source. This assumes there are no loss processes for the element between source and receptor, e.g., reactions and or volatilization. If the concentration profiles for the various contributing sources (i.e., the Cjj) are measured, as well as the total concentration OC, at the receptor, the set of simultaneous equations represented by (II) can be solved to obtain s., the contribution of each source for that particular element. 

In trying to characterize this Interaction more fully, we determined the reversibility of the pyran-lnduced perturbation of the heat capacity profile. Figure 2 shows profiles for control ghosts (the lower curve) and for ghosts Incubated with 3.7 mg/ml of pyran and then washed with fresh buffer 3 times - a treatment which reverses completely any effects of pH, Ionic strength or divalent Ions (14). The upper curve shows that the effect of pyran copolymer Is partially, but not completely, reversible under these conditions. In that the B2 and C transitions remain shifted. A small loss In amplitude of Bx may also be significant. This Is consistent with our quantitative binding experiments (discussed below) In which we have observed that a small but measurable amount of pyran remains associated with whole cells after a comparable treatment with fresh buffer. 

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