Home About us Contact
|
Home About us Contact | ||
|
|
||
Storage Container (storage + container)
Selected AbstractsThe Stability of Collected Human Scent Under Various Environmental Conditions,JOURNAL OF FORENSIC SCIENCES, Issue 6 2009Davia T. Hudson Ph.D. Abstract:, Human scent evidence collected from objects at a crime scene is used for scent discrimination with specially trained canines. Storage of the scent evidence is usually required yet no optimized storage protocol has been determined. Storage containers including glass, polyethylene, and aluminized pouches were evaluated to determine the optimal medium for storing human scent evidence of which glass was determined to be the optimal storage matrix. Hand odor samples were collected on three different sorbent materials, sealed in glass vials and subjected to different storage environments including room temperature, ,80°C conditions, dark storage, and UVA/UVB light exposure over a 7-week period. Volatile organic compounds (VOCs) in the headspace of the samples were extracted and identified using solid-phase micro-extraction,gas chromatography/mass spectrometry (SPME,GC/MS). Three-dimensional covariance mapping showed that glass containers subjected to minimal UVA/UVB light exposure provide the most stable environment for stored human scent samples. [source] Sloshing analysis of a liquid storage container using level set X-FEMINTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN BIOMEDICAL ENGINEERING, Issue 4 2009Toshio Nagashima Abstract The extended finite element method (X-FEM), in conjunction with the level set method, is applied to sloshing analysis of a rigid container filled with liquid. The governing equations for liquid with a free surface based on the potential flow theory are discretized using the framework of level set X-FEM. Once the space domain of a container is modeled by tetrahedral elements, sloshing analysis for arbitrary liquid levels and configurations can be performed without remeshing. Natural frequencies of free surface sloshing motion in rigid containers of various shapes were computed by the proposed method and the results were compared with those obtained by theoretical solutions and experiments. The proposed method was demonstrated to perform sloshing analysis efficiently for rigid containers with various liquid levels and configurations. Copyright © 2008 John Wiley & Sons, Ltd. [source] Paired comparison of apheresis platelet function after storage in two containersJOURNAL OF CLINICAL APHERESIS, Issue 1 2001Jürgen Zingsem Abstract Platelet quality after storage strongly depends on the pre-storage quality as well as on the storage conditions determined by the storage container. In this paired study, we evaluated two different containers (MedSep CLXÔ and Delmed DPL-110). The Fresenius AS104 cell separator was used to prepare 17 platelet concentrates that were split and distributed into the containers to be compared. Cell counts, blood gas analysis, morphological scores, glucose and lactate levels, platelet activation, and platelet aggregation were measured before splitting at the day of preparation and after storage at day 3 and day 5. At day 3, there was no significant difference between the two bags apart from increased lactate and decreased pCO2 concentrations in the CLXÔ bags. At day 5 there were significantly higher lactate concentrations, pO2 levels, and aggregation after stimulation in the CLXÔ group, while the glucose and pCO2 concentrations were significantly lower in these platelet concentrates as compared to the DPL-110 group. However, these parameters did not influence the functional parameters tested. While the platelet quality decreased during storage in all bags, the functional changes were nearly identical in both bags tested. We conclude that both bags are equivalent for 5-day storage of platelet concentrates. J. Clin. Apheresis. 16:10,14, 2001. © 2001 Wiley-Liss, Inc. [source] Stabilization of human papillomavirus virus-like particles by non-ionic surfactantsJOURNAL OF PHARMACEUTICAL SCIENCES, Issue 7 2005Li Shi Abstract Human papillomavirus (HPV) virus-like-particles (VLPs) produced by recombinant expression systems are promising vaccine candidates for prevention of cervical cancers as well as genital warts. At high protein concentrations, HPV VLPs, comprised of the viral capsid protein L1 and expressed and purified from yeast, are protected against detectable aggregation during preparation and storage by high concentrations of NaCl. At low protein concentrations, however, high salt concentration alone does not fully protect HPV VLPs from aggregation. Moreover, the analytical analysis of HPV VLPs proved to be a challenge due to surface adsorption of HPV VLPs to storage containers and cuvettes. The introduction of non-ionic surfactants into HPV VLP aqueous solutions provides significantly enhanced stabilization of HPV VLPs against aggregation upon exposure to low salt and protein concentration, as well as protection against surface adsorption and aggregation due to heat stress and physical agitation. The mechanism of non-ionic surfactant stabilization of HPV VLPs was extensively studied using polysorbate 80 (PS80) as a representative non-ionic surfactant. The results suggest that PS80 stabilizes HPV VLPs mainly by competing with the VLPs for various container surfaces and air/water interfaces. No appreciable binding of PS80 to intact HPV VLPs was observed although PS80 does bind to the denatured HPV L1 protein. Even in the presence of stabilizing level of PS80, however, an ionic strength dependence of HPV VLP stabilization against aggregation is observed indicating optimization of both salt and non-ionic surfactant levels is required for effective stabilization of HPV VLPs in solution. © 2005 Wiley-Liss, Inc. and the American Pharmacists Association J Pharm Sci 94:1538,1551, 2005 [source] 5 The Contraption: A Low-Cost Participatory Hemodynamic SimulatorACADEMIC EMERGENCY MEDICINE, Issue 2008James Ritchie A hemodynamic simulator assembled from readily-available, inexpensive components can be used to demonstrate complex, clinically pertinent physiologic concepts in a hands-on experiential setting. Our simulator is composed of clear plastic tubing, squeeze bulbs, Heimlich valves, simple plastic connectors, balloons, IV tubing, plastic storage containers, a low-pressure gauge, and a child's water wheel. After a short introduction, student participants reproduce cardiac and systemic vascular function in a coordinated simulation. Normal functional physiology is demonstrated, followed by scripted changes in physiologic conditions. At least four students are simultaneously involved in managing the simulation, including squeezing the bulbs in simulating heart chamber contraction, modifying afterload, preload, and heart rate, and assessing output parameters such as blood pressure, cerebral blood flow, and cardiac output. Using this model, we are able to demonstrate and teach the following concepts: preload, afterload, hypertensive consequences, effects of dysrhythmias, valve disorders, preload criticality with disorders such as tamponade and right ventricular MI, gradual nature of change in physiology, normal compensation despite serious malfunction, relationship of blood pressure with cardiac output, shock state despite normal BP, neurogenic shock, septic shock, hypovolemic shock, cardiogenic shock, cardiac work, maximum blood pressure, vasopressor physiology, diastolic dysfunction coupled with decreased preload or atrial dysfunction, and CHF treatment options. Trainee feedback has been overwhelmingly positive. Trainees at all levels of training, including EMTs and senior EM residents, have grasped complex hemodynamic physiology concepts intuitively after participating with this trainer. [source] | |||||||||||||