Aging, intrinsic

Poly(vinyl cinnamate) Resists. Dichromated resists exhibit numerous shortcomings which include lot-to-lot variabiUty of the components, aging of the formulated resists in solution and in coated form, poor process stabiUty (due to a sensitivity to variations in temperature and humidity), and intrinsically low photosensitivity requiring long exposure times for adequate insolubilization. 

Intrinsic Factor PK Study Reports (sex, age, race, weight, etc.)... 

This equation is based on a light scattering-intrinsic viscosity correlation for pentanediol based polyurethanes ( ). No molecular weight degradation in DMF was observed after aging the solutions for several days. 

Historically, photoaging has been defined as the superimposed effects of photodamage on intrinsically aging skin. It is a consequence of chronic ultraviolet light exposure. Photodam-... 

All humans experience intrinsic aging. Typically, it is characterized by smooth, relatively atrophic, finely wrinkled or lax skin. Histologically, the stratum corneum is normal. However, the epidermis is atrophic and there is flattening of the dermo-epidermal junction. Dermal features include decreased thickness, loss of elastic fibers, and a decrease in the biosynthetic capacity of fibroblasts [i, 2] (Table 15.1). 

Table 15.1. Clinical and histological features of intrinsic (chronological) and extrinsic (photoaging) aging ...

Bhawan J, Andersen W, Lee J, Labadie R, Solares G (1995) Photoaging versus intrinsic aging a morphologic assessment of facial skin. J Cutan Pathol 22 154-159... 

Knowledge of intrinsic co-variables. Concentrations of mercury in fish are typically correlated with age or body size. An understanding of, and ability to account for, the effects of such intrinsic variables is essential for evaluating contaminant trends. 

Careful monitoring and preventative care of high-risk patients can begin once these patients are identified. Intrinsic, or host-related, risk factors for the development of pressure sores include age greater than 75 years, limited mobility, loss of sensation, unconsciousness or altered sense of awareness, and malnutrition. Extrinsic, or environmental, risk factors include pressure, friction, shear stress, and moisture.37,42... 

In the case of undoped PVCa films, impurities and surface states dominate the photoconduction mechanism (6) leading one to question any study of intrinsic pKotoconduction in organic polymers. Poly(N-vinylcarbazole) films yellow under ambient laboratory conditions. Work in our laboratory (7) has shown that ageing of a purified sample of PVCa leads to an increase in photoresponse in the 350-450 nm region while there is an initial drop in photoresponse in the 250-... 

Comparison of our stellar abundance data with [Th/Eu] vs. [Fe/H] curves obtained from the GCE models, calculated for four different Galactic disk ages - 6, 9, 12, and 15 Gyr Tq = 8.2 1.9 Gyr. The uncertainty is relative only to the abundance ratio uncertainties, not considering the uncertainties intrinsic to the GCE model itself, which are difficult to evaluate. 

Metals have characteristics that make them desirable for construction, implements, and ornamental uses such as in jewelry. Metals have been so important that the names Chalcolithic, Bronze, and Iron Age have been applied to epochs of history. Metals have an enduring quality. They are solid, durable, and attractive. The first draft of this passage is being written with a pen made of sterling silver (an alloy consisting of 92.5% silver and 7.5% copper). The lure of metals has drawn adventurers to remote places, and they have been the spoils of war. Their intrinsic value is exemplified by the ornaments we wear and the role of metals in monetary systems. 

The presence of 26Mg excesses correlated with Al/Mg ratios in fifteen Ca-Al-rich inclusions from the Allende and Leoville carbonaceous chrondrites has provided additional strong evidence for the in situ decay of 26A1 (see [9] for a recent review of isotopic anomalies). There are also, however, several examples of minerals whose isotopic compositions depart substantially from a unique Al-Mg isochron, even within a single inclusion [10,11]. Since deviations from the isochron may reflect either differences in the formation age of individual minerals or intrinsic heterogeneities in the initial 26A1/27A1 ratio, the value of the Al-Mg system as a chronometer for early solar system events remains unclear. 

Glaciochemical horizons not only provide checks on depth-age relationships but are of great intrinsic interest. Continuous chemical analysis of a well-dated core promises to greatly extend and refine the record of explosive volcanism [13]. Each well-dated eruption or other horizon then becomes of use as a time marker for cores where the dating is less precise. 

---