The Experts below are selected from a list of 1440 Experts worldwide ranked by ideXlab platform
Alexander R Cruden - One of the best experts on this subject based on the ideXlab platform.
-
rheology of Petrolatum paraffin oil mixtures applications to analogue modelling of geological processes
Journal of Structural Geology, 2014Co-Authors: João C. Duarte, Wouter Pieter Schellart, Alexander R CrudenAbstract:Paraffins have been widely used in analogue modelling of geological processes. Petrolatum and paraffin oil are commonly used to lubricate model boundaries and to simulate weak layers. In this paper, we present rheological tests of Petrolatum, paraffin oil and several homogeneous mixtures of the two. The results show that Petrolatum and all Petrolatumeparaffin oil mixtures are strain, strain rate and temperature dependent under typical experimental strain rates (10 � 3 e10 � 1 s � 1 ). For the same conditions, pure paraffin oil is a slightly temperature-dependent, linear, Newtonian fluid. All mixtures have yield stress and flow stress (strain softening) values that decrease with decreasing shear rate, and with increasing relative amounts of paraffin oil. The degree of strain rate dependence (shear thinning) also decreases with increasing paraffin oil content. Because these materials have rheologies that can be characterized and controlled, they are suitable for use in a large number of analogue model settings, either as a lubricant or to simulate weak layers. When used as a lubricant, mixtures with higher paraffin oil content should perform better than pure Petrolatum.
-
rheology of Petrolatum paraffin oil mixtures applications to analogue modelling of geological processes
Journal of Structural Geology, 2014Co-Authors: João C. Duarte, Wouter Pieter Schellart, Alexander R CrudenAbstract:Abstract Paraffins have been widely used in analogue modelling of geological processes. Petrolatum and paraffin oil are commonly used to lubricate model boundaries and to simulate weak layers. In this paper, we present rheological tests of Petrolatum, paraffin oil and several homogeneous mixtures of the two. The results show that Petrolatum and all Petrolatum–paraffin oil mixtures are strain, strain rate and temperature dependent under typical experimental strain rates (10−3–10−1 s−1). For the same conditions, pure paraffin oil is a slightly temperature-dependent, linear, Newtonian fluid. All mixtures have yield stress and flow stress (strain softening) values that decrease with decreasing shear rate, and with increasing relative amounts of paraffin oil. The degree of strain rate dependence (shear thinning) also decreases with increasing paraffin oil content. Because these materials have rheologies that can be characterized and controlled, they are suitable for use in a large number of analogue model settings, either as a lubricant or to simulate weak layers. When used as a lubricant, mixtures with higher paraffin oil content should perform better than pure Petrolatum.
S. Stubb - One of the best experts on this subject based on the ideXlab platform.
-
fixed drug eruption due to fluconazole
Journal of The American Academy of Dermatology, 2000Co-Authors: Hannele Heikkila, Kaisa Timonen, S. StubbAbstract:Abstract We report a case of fixed drug eruption caused by fluconazole. A local provocation with 10% fluconazole test in Petrolatum applied at the site of a previous lesion of fixed drug eruption reproduced the eruption clinically and histopathologically. (J Am Acad Dermatol 2000;42:883-4.)
-
fixed drug eruption due to fluconazole
Journal of The American Academy of Dermatology, 2000Co-Authors: Hannele Heikkila, Kaisa Timonen, S. StubbAbstract:We report a case of fixed drug eruption caused by fluconazole. A local provocation with 10% fluconazole test in Petrolatum applied at the site of a previous lesion of fixed drug eruption reproduced the eruption clinically and histopathologically.
João C. Duarte - One of the best experts on this subject based on the ideXlab platform.
-
rheology of Petrolatum paraffin oil mixtures applications to analogue modelling of geological processes
Journal of Structural Geology, 2014Co-Authors: João C. Duarte, Wouter Pieter Schellart, Alexander R CrudenAbstract:Paraffins have been widely used in analogue modelling of geological processes. Petrolatum and paraffin oil are commonly used to lubricate model boundaries and to simulate weak layers. In this paper, we present rheological tests of Petrolatum, paraffin oil and several homogeneous mixtures of the two. The results show that Petrolatum and all Petrolatumeparaffin oil mixtures are strain, strain rate and temperature dependent under typical experimental strain rates (10 � 3 e10 � 1 s � 1 ). For the same conditions, pure paraffin oil is a slightly temperature-dependent, linear, Newtonian fluid. All mixtures have yield stress and flow stress (strain softening) values that decrease with decreasing shear rate, and with increasing relative amounts of paraffin oil. The degree of strain rate dependence (shear thinning) also decreases with increasing paraffin oil content. Because these materials have rheologies that can be characterized and controlled, they are suitable for use in a large number of analogue model settings, either as a lubricant or to simulate weak layers. When used as a lubricant, mixtures with higher paraffin oil content should perform better than pure Petrolatum.
-
rheology of Petrolatum paraffin oil mixtures applications to analogue modelling of geological processes
Journal of Structural Geology, 2014Co-Authors: João C. Duarte, Wouter Pieter Schellart, Alexander R CrudenAbstract:Abstract Paraffins have been widely used in analogue modelling of geological processes. Petrolatum and paraffin oil are commonly used to lubricate model boundaries and to simulate weak layers. In this paper, we present rheological tests of Petrolatum, paraffin oil and several homogeneous mixtures of the two. The results show that Petrolatum and all Petrolatum–paraffin oil mixtures are strain, strain rate and temperature dependent under typical experimental strain rates (10−3–10−1 s−1). For the same conditions, pure paraffin oil is a slightly temperature-dependent, linear, Newtonian fluid. All mixtures have yield stress and flow stress (strain softening) values that decrease with decreasing shear rate, and with increasing relative amounts of paraffin oil. The degree of strain rate dependence (shear thinning) also decreases with increasing paraffin oil content. Because these materials have rheologies that can be characterized and controlled, they are suitable for use in a large number of analogue model settings, either as a lubricant or to simulate weak layers. When used as a lubricant, mixtures with higher paraffin oil content should perform better than pure Petrolatum.
Hannele Heikkila - One of the best experts on this subject based on the ideXlab platform.
-
fixed drug eruption due to fluconazole
Journal of The American Academy of Dermatology, 2000Co-Authors: Hannele Heikkila, Kaisa Timonen, S. StubbAbstract:Abstract We report a case of fixed drug eruption caused by fluconazole. A local provocation with 10% fluconazole test in Petrolatum applied at the site of a previous lesion of fixed drug eruption reproduced the eruption clinically and histopathologically. (J Am Acad Dermatol 2000;42:883-4.)
-
fixed drug eruption due to fluconazole
Journal of The American Academy of Dermatology, 2000Co-Authors: Hannele Heikkila, Kaisa Timonen, S. StubbAbstract:We report a case of fixed drug eruption caused by fluconazole. A local provocation with 10% fluconazole test in Petrolatum applied at the site of a previous lesion of fixed drug eruption reproduced the eruption clinically and histopathologically.
Helmuth Goepfert - One of the best experts on this subject based on the ideXlab platform.
-
split thickness skin graft donor site management a randomized prospective trial comparing a hydrophilic polyurethane absorbent foam dressing with a Petrolatum gauze dressing
Archives of Otolaryngology-head & Neck Surgery, 1995Co-Authors: Randal S Weber, Patti Hankins, Ellen Limitone, David L Callender, Robert M Frankenthaler, Pat Wolf, Helmuth GoepfertAbstract:Objective: Traditionally, skin graft donor sites have been covered with fine-mesh gauze dressings, and a dry eschar has been allowed to form. Newer dressings that can provide a moist wound environment may facilitate reepithelialization. We compared a hydrophilic semipermeable absorbent polyurethane foam dressing that provides a moist wound environment with a Petrolatum gauze dressing for donor sites. Design: Prospective randomized trial; follow-up at 14 days. Setting: Department of head and neck surgery in a tertiary care center. Patients: Sixty-eight eligible patients received one of the two dressings. Harvested skin grafts were 0.375-mm (0.015-in) thick; donor site surface areas were recorded. At postoperative day 14, the dressings were removed, and wound epithelialization was scored: 1, none; 2, scattered or spotty; and 3, complete. Donor site and operative site pain intensities were assessed by a visual numeric scale: none (0) to the worst (100) experienced over the preceding 24-hour period. Pain scores were available for 58 patients. Main Outcome Measures: Dressings were compared based on these criteria: healing at 14 days, infection, and donor site and operative site pain. Results: A healing score of 3 was seen in 37% (14/38) of patients with hydrophilic semipermeable absorbent polyurethane foam dressings and in 17% (5/30) of patients with Petrolatum gauze dressings ( P =.06) by day 14. Overall, however, mean healing scores were similar in both groups. Mean healing scores for the patients who received a hydrophilic semipermeable absorbent polyurethane foam dressing was 2.3 (SD=0.6) vs 2.2 (SD=0.6) for patients who received the Petrolatum gauze dressing ( P =.20). Numbers of days required for complete epithelialization in these groups were 20.6 (SD=10.1) and 19.3 (SD=5.1), respectively ( P =.49). One infection occurred in the group who received the Petrolatum gauze dressing. The mean maximum pain intensity scores were lower for those who were given the hydrophilic semipermeable absorbent polyurethane foam dressing on postoperative days 1 through 3 ( P =.003,.03, and.04, respectively). Pain increased with a larger donor site surface area for the patients with the Petrolatum gauze dressing but not for the patients with the hydrophilic semipermeable absorbent polyurethane foam dressing. Conclusions: The hydrophilic semipermeable absorbent polyurethane foam dressing appears to have potential advantages over the Petrolatum gauze dressing: it produces less initial patient donor site discomfort and tends to produce more complete donor site healing by postoperative day 14. (Arch Otolaryngol Head Neck Surg. 1995;121:1145-1149)
