Phase size/composition dependence in immiscible blends: Experimental and theoretical considerations

1990 ◽  
Vol 28 (12) ◽  
pp. 2259-2269 ◽  
Author(s):  
B. D. Favis ◽  
J. M. Willis
Keyword(s):  
Composition Dependence ◽  
Size Composition ◽  
Immiscible Blends ◽  
Phase Size ◽  
Theoretical Considerations

scholarly journals Nanoporous Polymer Films from Immiscible Polymer Blends: Pore Size and Composition Dependence

2004 ◽  
Vol 856 ◽  
Author(s):  
Tong Liu ◽  
Rahmi Ozisik ◽  
Richard W. Siegel
Keyword(s):  
Pore Size ◽  
Polymer Films ◽  
Spin Coating ◽  
Composition Dependence ◽  
Processing Parameters ◽  
Immiscible Polymer Blends ◽  
Immiscible Blends ◽  
Nanoporous Films ◽  
Phase Separation Process ◽  
Poly Caprolactone

ABSTRACTNanoporous polymer films have been prepared using immiscible blends of polyetherimide (PEI) and poly(caprolactone diol) (PCLD). The films were prepared by spin-coating from a common solvent — dichloromethane (DCM). To create the nanoporous films, PCLD was removed by immersing the films in acetone, which dissolves PCLD only. Field emission scanning electron microscopy was used to study the porous structure. The pore structure of the films was affected by many factors such as composition of the blend, molecular weight, and various processing parameters. The formation of nanometer size pores was mainly due to the fast phase separation process during spin-coating. The pore size and pore size distribution was found to depend on the blend composition.

Controllable Nd2Fe14B/α-Fe nanocomposites: chemical synthesis and magnetic properties

Nanoscale ◽  
2014 ◽  
Vol 6 (18) ◽  
pp. 10638-10642 ◽  
Author(s):  
Lianqing Yu ◽  
Ce Yang ◽  
Yanglong Hou
Keyword(s):  
Thermal Decomposition ◽  
Magnetic Properties ◽  
Chemical Synthesis ◽  
Size Composition ◽  
Annealing Process ◽  
Phase Size ◽  
Reductive Annealing

Exchange-coupled nanocomposites of Nd2Fe14B/α-Fe are successfully synthesized by thermal decomposition and reductive annealing process. The phase size, composition, as well as magnetic properties, can be readily tuned by changing the ratio between Nd-Fe-B-oxide and α-Fe. The optimum properties shows coercivity of 12 000 Gs and an enhanced remanence of Mr/M3T = 0.63.

The Biological Clock and Sleep in the Elderly

2006 ◽  
Vol 19 (1) ◽  
pp. 45-51 ◽  
Author(s):  
Myriam Juda ◽  
Mirjam Münch ◽  
Anna Wirz-Justice ◽  
Martha Merrow ◽  
Till Roenneberg
Keyword(s):  
Circadian Rhythms ◽  
Biological Clock ◽  
The Elderly ◽  
Early Morning ◽  
Behavioral Changes ◽  
Older Age ◽  
Age Related ◽  
Theoretical Considerations ◽  
Sleep Difficulties ◽  
Circadian Biology

Abstract: Among many other changes, older age is characterized by advanced sleep-wake cycles, changes in the amplitude of various circadian rhythms, as well as reduced entrainment to zeitgebers. These features reveal themselves through early morning awakenings, sleep difficulties at night, and a re-emergence of daytime napping. This review summarizes the observations concerning the biological clock and sleep in the elderly and discusses the documented and theoretical considerations behind these age-related behavioral changes, especially with respect to circadian biology.

Imprecision of Laboratory Determinations and Diagnostic Accuracy: Theoretical Considerations

1974 ◽  
Vol 13 (03) ◽  
pp. 151-158 ◽  
Author(s):  
D. A. B. Lindbebo ◽  
Fr. R. Watson
Keyword(s):  
Mathematical Model ◽  
Diagnostic Accuracy ◽  
Diagnostic Process ◽  
Clinical Laboratories ◽  
Non Linear ◽  
Theoretical Considerations ◽  
Made In

Recent studies suggest the determinations of clinical laboratories must be made more precise than at present. This paper presents a means of examining benefits of improvement in precision. To do this we use a mathematical model of the effect upon the diagnostic process of imprecision in measurements and the influence upon these two of Importance of Diagnosis and Prevalence of Disease. The interaction of these effects is grossly non-linear. There is therefore no proper intuitive answer to questions involving these matters. The effects can always, however, be calculated.Including a great many assumptions the modeling suggests that improvements in precision of any determination ought probably to be made in hospital rather than screening laboratories, unless Importance of Diagnosis is extremely high.

The Estimation of the Number of Binding Sites for Antibody on Antigen Molecules with Reference to Factor VIII and its Antibody

1976 ◽  
Vol 35 (02) ◽  
pp. 274-288 ◽  
Author(s):  
Judith Pool ◽  
Rosemary Biggs ◽  
R. G Miller
Keyword(s):  
Factor Viii ◽  
Binding Sites ◽  
Theoretical Basis ◽  
Human Antibody ◽  
Rabbit Antibody ◽  
Number Of Binding Sites ◽  
Theoretical Considerations

SummaryThe theoretical basis for determining the number of antibody sites on antigen molecules is examined. The theoretical considerations are applied to factor VIII molecules. Examples based on data available at the Oxford Haemophilia Centre are calculated to illustrate the approach. It is concluded that there are few sites on each factor VIII molecule for human antibody. The three antibodies for which reasonable data were available suggest 1–3 sites for human antibody. The data for rabbit antibody suggest 5–6 sites per factor VIII molecule.

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