A Comparative Analysis of Techniques Used to Estimate the Mean Recoil                 Compressive Strength of High Performance Polymers

We are studying the crystallization and annealing behavior of high performance polymers, like poly(p-pheny1ene sulfide) PPS, and poly-(etheretherketone), PEEK. Our purpose is to determine whether PPS, which is similar in many ways to PEEK, undergoes reorganization during annealing. In an effort to address the issue of reorganization, we are studying solution grown single crystals of PPS as model materials.Observation of solution grown PPS crystals has been reported. Even from dilute solution, embrionic spherulites and aggregates were formed. We observe that these morphologies result when solutions containing uncrystallized polymer are cooled. To obtain samples of uniform single crystals, we have used two-stage self seeding and solution replacement techniques.

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Placental Transfer of Vitamin K1 and Its Implications in Fetal Hemostasis

Thrombosis and Haemostasis ◽

10.1055/s-0038-1647631 ◽

1988 ◽

Vol 60 (01) ◽

pp. 039-043 ◽

Cited By ~ 52

Author(s):

L Mandelbrot ◽

M Guillaumont ◽

M Leclercq ◽

J J Lefrère ◽

D Gozin ◽

...

Keyword(s):

Vitamin K ◽

High Performance ◽

Ultrasound Guidance ◽

Placental Transfer ◽

Vitamin K1 ◽

Vitamin K Deficiency ◽

Prothrombin Activity ◽

Oral Supplementation ◽

K Deficiency ◽

The Mean

SummaryVitamin K status was evaluated using coagulation studies and/ or vitamin IQ assays in a total of 53 normal fetuses and 47 neonates. Second trimester fetal blood samples were obtained for prenatal diagnosis under ultrasound guidance. Endogenous vitamin K1 concentrations (determined by high performance liquid chromatography) were substantially lower than maternal levels. The mean maternal-fetal gradient was 14-fold at mid trimester and 18-fold at birth. Despite low vitamin K levels, descarboxy prothrombin, detected by a staphylocoagulase assay, was elevated in only a single fetus and a single neonate.After maternal oral supplementation with vitamin K1, cord vitamin K1 levels were boosted 30-fold at mid trimester and 60 fold at term, demonstrating placental transfer. However, these levels were substantially lower than corresponding supplemented maternal levels. Despite elevated vitamin K1 concentrations, supplemented fetuses and neonates showed no increase in total or coagulant prothrombin activity. These results suggest that the low prothrombin levels found during intrauterine life are not due to vitamin K deficiency.

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Effect of Partial Replacement of Cement with Silica Fume and Cellulose Fibre on Workability & Compressive Strength of High Performance Concrete

Indian Journal Of Applied Research ◽

10.15373/2249555x/july2013/82 ◽

2011 ◽

Vol 3 (7) ◽

pp. 263-264

Author(s):

Pratik Patel ◽

◽

Dr. Indrajit N Patel

Keyword(s):

Compressive Strength ◽

Silica Fume ◽

High Performance ◽

High Performance Concrete ◽

Cellulose Fibre ◽

Partial Replacement

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CHEMICAL CONVERSION OF 2.4.6-TRINITROTOLUENE (TNT) TO NEW HIGH PERFORMANCE POLYMERS

International Journal of Energetic Materials and Chemical Propulsion ◽

10.1615/intjenergeticmaterialschemprop.v5.i1-6.1060 ◽

2002 ◽

Vol 5 (1-6) ◽

pp. 1031-1047

Author(s):

A. L. Rusanov ◽

L. G. Komarova ◽

M. P. Prigozhina ◽

V. A. Tartakovsky ◽

S. A. Shevelev ◽

...

Keyword(s):

High Performance ◽

Chemical Conversion ◽

High Performance Polymers

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MOLDSTAR 90

Alloy Digest ◽

10.31399/asm.ad.cu0732 ◽

2005 ◽

Vol 54 (3) ◽

Keyword(s):

Compressive Strength ◽

Injection Molding ◽

Physical Properties ◽

Surface Treatment ◽

Tensile Properties ◽

Copper Alloy ◽

High Performance ◽

Blow Molding

Abstract MoldStar 90 is a high-performance beryllium-free copper alloy for the blow-molding and injection-molding industries. This datasheet provides information on composition, physical properties, hardness, tensile properties, and compressive strength. It also includes information on machining, joining, and surface treatment. Filing Code: CU-732. Producer or source: Performance Alloys.

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MOLDSTAR 150

Alloy Digest ◽

10.31399/asm.ad.cu0729 ◽

2005 ◽

Vol 54 (2) ◽

Keyword(s):

Compressive Strength ◽

Injection Molding ◽

Physical Properties ◽

Surface Treatment ◽

Tensile Properties ◽

Copper Alloy ◽

High Performance ◽

Blow Molding

Abstract MoldStar 150 (formerly PAS 940) is a high performance copper alloy for the blow-molding and injection-molding industries. This datasheet provides information on composition, physical properties, tensile properties, and compressive strength. It also includes information on forming, machining, joining, and surface treatment. Filing Code: CU-729. Producer or source: Performance Alloys.

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Comparative Analysis of Different Local Anesthetic Solutions Available in Market: An In Vitro and Clinical Study

European Journal of Dentistry ◽

10.1055/s-0041-1727553 ◽

2021 ◽

Author(s):

Eisha Imran ◽

Faisal Moeen ◽

Beenish Abbas ◽

Bakhtawar Yaqoob ◽

Mehreen Wajahat ◽

...

Keyword(s):

Comparative Analysis ◽

Local Anesthetic ◽

Compositional Analysis ◽

Bacterial Activity ◽

Similar Composition ◽

Ph Values ◽

Significant Difference ◽

The Mean ◽

The Difference

Abstract Objectives The study aimed to evaluate and compare various commercially available local anesthetic solutions. Materials and Methods A total of 150 commercially available local anesthetic cartridges of similar composition (2% lidocaine with epinephrine 1:100,000) were randomly collected and divided into 3 groups. The designations of groups were selected from their product names such that each group consisted of 60 cartridges. Group S (Septodont, France) Group M (Medicaine, Korea) and Group H (HD-Caine, Pakistan). The samples were divided into five sub-groups, each consisting of 10 cartridges from each group to investigate each parameter. Results The acquired data was statistically analyzed and compared (using SPSS version 12). Compositional analysis revealed a non-significant (P>0.05) difference when the three Groups were compared with standard lidocaine and epinephrine solutions. The mean pH values of samples from group S, M and H respectively fell within the range of pH values of commercially available solutions. Non-significant difference in EPT values of Group S and H was found when efficacy was compared (p = 0.3), however a significant difference (p < 0.01) was observed in contrast to Group M. Anti-bacterial activity was observed in all the group and a non-significant difference in cell viability values of Group S and M was found (p = 0.6), while the difference was significant in comparison to Group H. Conclusion Within the limitations of these investigations, it appears that the properties of different manufacturers fall within the recommended ranges as mentioned in literature and do not appear to be statistically different in the variables we have tested.

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