Characterization of viscous response of a polymer during fabric IMD injection process by means a spiral mold

Injection molding is a plastic transformation process to produce complex parts; an efficient way of decorating a part is to do it during the molding cycle, introducing decorated film or fabric inside the mold.One of the most important tools to optimize the injection cycle is to make simulations, but the recognized software do not have potential to simulate IMD (In Mold Decoration) process because the behavior of the polymer flowing over fabric is unknown.This article is focused on the design of a methodology to characterize polymer rheological behavior from a macroscopic point of view, in order to estimate a useful viscous model for use in CAE software by means of a spiral mold and pressure sensors located in it, instead of a rheometer. However, the test temperature of polymer is not constant during the test when the spiral mold method is used, and it is necessary to introduce corrections.For authors, this study is a novelty because any author has used a spiral mold to characterize the rheological behavior of polymers injected over fabric, and the exposed methodology will be very useful to adjust IMD pressure drop on computer programs.     

Gamma‐linolenic and stearidonic acids from Moroccan Boraginaceae

Seeds from 20 species belonging to Boraginaceae, subfamilies Boraginoideae and Heliotropioideae, were surveyed in a search for new sources of γ‐linolenic acid (GLA) and stearidonic acid (SDA). Seed oil content ranged from 7.5% in Echium humile ssp. pycnanthum to 28.8% in Anchusa undulata. GLA ranged from 0.2% of total fatty acids in Heliotropium undulatum to 20.2% in Lithodora maroccana. This last species may be considered as new source of GLA. GLA content was also tested in other Lithodora species from the south east of Spain, to compare GLA percentages among related taxa. GLA amounts in all Echium species reached approximately 12%, in good agreement with previous findings in other European Echium species. SDA ranged from an absence in several Cynoglossum species to 16.2% in Echium humile ssp. pycnanthum, which may be considered as a new source of this fatty acid.     

Adenoid cystic carcinoma of the lacrimal gland simulating a dermoid cyst in a 9-year-old boy

Adenoid cystic carcinoma of the lacrimal gland is a malignant neoplasm that is generally found in adults and is usually managed by orbital exenteration and supplemental external beam irradiation or chemotherapy. A recent report has suggested that the tumor may have a less malignant course in children. We describe a case of adenoid cystic carcinoma of the lacrimal gland that simulated a dermoid cyst clinically and radiographically in a 9-year-old boy. The patient was treated with local surgical resection of the mass, followed by orbital plaque brachytherapy. Based on a review of the literature and our recent experience, the advisability of a more conservative approach to this tumor in selected cases is discussed. Although no prognostic conclusions can be drawn on the basis of a single case report with short follow-up, the relatively earlier detection of this tumor made possible by modern orbital imaging studies may allow total removal at an earlier stage and prevent orbital exenteration in a patient with normal vision. Recent developments suggest that there may be a basis for reassessing the advisability of a radical approach to the management of adenoid cystic carcinoma of the lacrimal gland in selected cases.     

Comparative study of 2 variants of a modified esophageal transection in the Sugiura-Futagawa operation

From December of 1990 to December of 1997, 119 subjects visited to our hospital to receive post-exposure therapy using purified chick embryo cell rabies vaccine manufactured by the Chem-Sero-Theraptic Institute (Katestuken), because they had been bitten by supposed rabid animals abroad. The forty of the subjects (male: 25, female: 15) wished to have their anti-rabies antibody levels examined. The number of samples taken after 5 or 6 shots rabies vaccine were 30 and 15, respectively. The antibody levels after 6 shots of rabies vaccine varied from 1.0 IU/ml to 10.1 IU/ml. After 5 shots the antibody levels fluctuated from under 0.1 IU/ml to over 8.8 IU/ml, and 3 subjects were found to have antibody titers of under 0.5 IU/ml which is the WHO minimal protective level. Two of these 3 subjects found to have antibodies of 1.0 IU/ml and 3.1 IU/ml. after the 6th injection. However, these 3 subjects had the hazard to have rabies despite post-exposure immunization, because the incubation period of rabies is found to be 1-3 months in about 60% of the cases. The potency of Kaketsuken's rabies vaccine should be increased to provide higher antibody levels.     

2010 Index of Articles

Abstract:

This article documents research examining commitment levels and follower behaviors across generations. Behavioral and commitment characteristics were measured and examined for relationships across different generations of employees in technical and non-technical occupations in separate studies. The results of the findings from both studies show relationships across generations in levels of commitment and follower behaviors. The results suggest that technical occupations show more association of follower behaviors and less association of commitment levels. Analysis indicates that non-technical occupations show less association of follower behaviors and more association of commitment levels across generations. Strategies for application in the workplace are provided.     

Dynamics of indigenous yeast populations during spontaneous fermentation of wines from Mendoza, Argentina

Fermentation of wine is a complex microbial reaction, which involves the sequential development of various species of yeasts and lactic acid bacteria. Of these, yeasts are the main group responsible for alcoholic fermentation. The aim of this work was to study, under industrial conditions, the evolution of yeast populations and to describe the individual evolution of the most important yeasts during three spontaneous fermentations of Malbec musts from Argentina. This work shows the significant participation of non-Saccharomyces yeasts during spontaneous fermentation of musts, with the ubiquitous presence of three main species: Kloeckera apiculata, Candida stellata and Metschnikowia pulcherrima.     

Modeling of a Vanadium Redox Flow Battery for power system dynamic studies

Vanadium Redox Flow Battery (VRB) is an electrochemical energy storage system based on a reversible chemical reaction within a sealed electrolyte. Several models have been developed which now offer a good understanding of the VRB operating principles; this knowledge is important to evaluate its performance when applied in power systems. However, these models depend on parameters that are difficult to obtain experimentally or in data sheets. In this regard, this article presents a new VRB model based on the stack efficiency curves, usually determined by the manufacturer. This model is especially useful for computing intensive applications, such as power system dynamic studies, in order to maintain a low run-time. Finally, the simulation results obtained through the proposed model are compared with laboratory results of an experimental VRB system, showing a striking resemblance with only a little relative error arising from them.     

Salmonella contamination during production of cantaloupe: a binational study

Six cantaloupe farms and packing plants in South Texas (950 cantaloupe, 140 water, and 45 environmental samples), including the Rio Grande Valley area, and three farms in Colima State, Mexico (300 cantaloupe, 45 water, and 15 environmental samples), were sampled to evaluate cantaloupe contamination with Salmonella and Escherichia coli during production and processing. Samples collected from external surfaces of cantaloupes, water, and the environments of packing sheds on cantaloupe farms were examined for the presence of Salmonella and E. coli. Of a total of 1,735 samples collected, 31 (1.8%) tested positive for Salmonella. Fifteen Salmonella serotypes were isolated from samples collected in Texas, and nine from samples collected in Colima. Two serotypes (Poona and Oranienburg) that have been associated with three large Salmonella outbreaks in the United States and Canada linked to the consumption of contaminated cantaloupe were found in water samples collected at four farms (three from the United States). Susceptibility of Salmonella isolates to 10 antimicrobials was evaluated by disk diffusion. Eighty-eight percent of the isolates from the United States and Mexico were pansusceptible to the antimicrobials tested; eight isolates from the United States demonstrated an intermediate susceptibility to streptomycin and only two isolates were resistant to the same antimicrobial. From Mexico, four isolates showed an intermediate susceptibility to streptomycin and one isolate was resistant to nalidixic acid and streptomycin. Repetitive sequence-based PCR analysis of Salmonella isolates helped to trace potential sources of Salmonella contamination in source water and in subsequent water samples obtained after the filtration systems of U.S. and Mexican cantaloupe farms. No differences could be seen between the levels of Salmonella contamination in melons from both countries.