123 research outputs found

    Rickettsia spp. in Ticks, Poland

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    Ticks are recognized as the main vectors and reservoirs of spotted fever group rickettsiae. We searched for the most prevalent Rickettsia spp. in Poland and found R. slovaca and R. helvetica bacteria in ticks in southern and central Poland; R. raoulti was found in ticks in all parts of Poland

    Indirect approach to continuous time system identification of food extruder

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    A three-stage approach to system identification in the continuous time is presented which is appropriate for day-to-day application by plant engineers in the process industry. The three stages are: data acquisition using relay feedback; non-parametric identification of the system step response; and parametric model fitting of the identified step response. The method is evaluated on a pilot-scale food-cooking extruder

    Cooperative effects involved in esterolytic reactions of cationic long chain esters catalyzed by benzimidazole-containing polymers

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    The solvolyses of positively charged esters with varying chain length catalyzed by benzimidazole, poly[5(6)-vinylbenzimidazole] and copolymers of 5(6)-vinylbenz-imidazole with acrylic acid were studied. Poly[5(6)-vinylbenzimidazole] showed a marked selectivity for the positively charged esters with varying aliphatic chain length but the catalytic activity was suppressed. In order to investigate the more detailed characteristics of the 5(6)-vinylbenzimidazole-acrylic acid copolymers in the solvolyses of these esters, the effects of copolymer composition on their catalytic activities were studied. In the solvolyses of every ester employed, the copolymer compositions affected their catalytic activities. In 40% 1-propanol-water the activities of the copolymers indicated a strong dependence on the carboxylatebenzimidazole-carboxylate triad. These effects were due to strong electrostatic interactions between these sequences and the substrates. The effects of solvent composition on the catalytic activities of the copolymer-catalyzed solvolyses were also investigated. The copolymers of 5(6)-vinylbenzimidazole with acrylic acid were found to have entirely different characteristics in methanol-water than in 1-propanol-water systems. The catalytic ability was found to be a function of the benzimidazole content and on the size of the substrate. Apolar interactions became a dominant force in the methanol-water system.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/22394/1/0000844.pd

    Conformational effects and cooperative interactions in poly[5(6)-vinylbenzimidazole]-catalyzed solvolyses of anionic, long-chain substrates

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    A new synthetic procedure for the monomer, 5(6)-vinylbenzimidazole, has been developed. Also, a new method for the formation of the benzimidazole moiety is reported. The monomer, 5(6)-vinylbenzimidazole, was subjected to a free radical solution polymerization and a solid state thermal polymerization. Poly[5(6)-vinyl-benzimidazole], prepared by the solution-free radical polymerization, was shown to be a linear addition polymer with pendant benzimidazole groups, whereas the thermally prepared polymer was shown to have a different structure. The solvolyses of negatively charged esters with varying aliphatic chain lengths catalyzed by poly[5(6)-vinylbenzimidazole] and compared to monomeric benzimidazole in 40% 1-propanol-water at 26[deg]C revealed that the polymer was more efficient and that its activity was a function of the degree of ionization. Neutral-neutral and neutral-anionic benzimidazole interactions are suggested. The polymer conformation was found to have a significant effect on the solvolysis reactions.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/22393/1/0000843.pd

    Perinatal/neonatal palliative care : effecting improved knowledge and multi-professional practice of midwifery and children's nursing students through an inter-professional education initiative

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    This paper presents a study that examines the potential value of a new and innovative inter-professional education (IPE) experience for final year midwifery and children's nursing students focused on improving awareness of end-of-life care for infants in conjunction with the support of their families. The study uses an action research approach to examine midwifery and children's nursing student experiences of an IPE initiative in developing knowledge regarding perinatal/neonatal palliative care. // The setting is a Higher Education Institute in the South of England that included final year midwifery students (n = 39) and children's nursing students (n = 34) taking part in the study. Qualitative and quantitative data indicated that the IPE intervention had proven worth in developing knowledge and confidence in the students as both student groupings felt they lacked knowledge and confidence about perinatal/neonatal palliative care before attending the study day. // Students felt that learning with, from and about the other profession represented was important in generating their knowledge. Educators should explore innovative ways to enable the further development of the fledgling speciality of perinatal/neonatal palliative care through education on an interprofessional platform
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