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BACKGROUND Keloids that are surgically removed commonly recur within the excision sites. OBJECTIVE Our purpose was to determine whether postsurgical adjunctive therapy reduces such recurrences. METHODS We determined the rate of recurrence after excision alone (n = 43) and postoperative injection with triamcinolone acetonide (TAC; n = 65) or interferon(More)
Keloid and hypertrophic scarring develop as a result of a proliferation of dermal tissue following skin injury. It is generally thought that tension plays a major pathophysiologic role. These proliferative scars are characterized by increased collagen and glycosaminoglycan content, as well as increase collagen turnover. The therapeutic management of(More)
BACKGROUND The treatment of striae distensae has recently been reported with various lasers such as the 585-nm pulsed dye laser. At lower fluences (2.0 to 4.0 J/cm2), this laser has been purported to increase the amount of collagen in the extracellular matrix. OBJECTIVE To determine whether the 585-nm pulsed dye laser is effective in both striae rubra and(More)
Einstein's 1935 derivation of mass—energy equivalence is philosophically impor­ tant because it contains both a criticism of purported demonstrations that proceed by analogy and strong motivations for the definitions of the 'new' dynamical quantities (viz relativistic momentum, relativistic kinetic energy and relativistic energy). In this paper, I argue(More)
BACKGROUND The exact mechanisms of action responsible for the effectiveness of silicone gel dressings are unknown, although it has been proposed that static electricity generated by friction could be the reason for their anti-scarring effects. OBJECTIVE We compared the efficacy of a cushion of silicone filled with liquid silicone gel reported to induce(More)
A biosensor for the detection of insecticides based on an ion-sensitive field-effect transistor (ISFET) was developed. The resulting device combines the simplicity of potentiometric sensors and the use of associated electronic systems as powerful tools for the acquisition and the processing of data. The enzyme acetylcholinesterase (AChE) was entrapped in a(More)
Interpretations of Einstein's equation differ primarily concerning whether E = mc 2 entails that mass and energy are the same property of physical systems, and hence whether there is any sense in which mass is ever 'converted' into energy (or vice versa). In this paper, I examine six interpretations of Einstein's equation and argue that all but one fail to(More)
The resting energy expenditure (REE) and substrate utilization are computed by indirect calorimetry technique (ICT). The REE represents 80-85% of the total energy expenditure (TEE) but only accounts for the 7% of the actual body weight (ABW). The TEE is produced by the organs plus muscles, whereas the REE accounts only for the main organs. An important(More)
A 69-year-old Hispanic woman presented for the evaluation of nodules on the head and back. In the past, she had been treated for basal cell carcinoma (BCC) of the face; the referring physician was concerned that the new lesions might also be BCC. The patient had an extensive past medical history. In addition to BCC, she had been treated for breast cancer,(More)