8 research outputs found

    Polish Organizations and Chicago\u27s Polonia, 1880-1930

    Get PDF
    Despite a large, growing amount of literature on the Polish community in Chicago, there remains a lack of information about organizations in the Polish communities. Organizations in the Polish community are generally spoken about in one of two ways. Either one organization is spoken about in great depth or organizations are barely touched upon. This work seeks to bridge both of those types of work by focusing both on small organizations and large organizations and connecting them through the Poles who were members. The Oral History of Chicago’s Polonia project, 1880-1930, is used in this work to limit the number of organizations that are discussed and to focus on how Polish immigrants were affected by multiple organizations. How organizations helped shape and were shaped by Chicago’s Polish community is a focal point of this work. This work explores how the shifting of Polish identity affected how organizations were developed and how they changed. It finds that Polish tradition and Polish Americanization played a role in organizations’ development, which in turn influenced the development of Polonia

    Androgens and androgen receptor in different ploidy Cobitis loaches

    No full text
    The diploid-polyploid Cobitis populations in Poland are dominated by gynogenetic allotriploid females coexisting with the low number of individuals of parental species, spined loach C. taenia and danubian loach C. elongatoides, and allotetraploids of both sexes. The low number of diploid Cobitis males in mixed diploid-polyploid populations and the data of sterility of tetraploid Cobitis males raise the question about their reproduction ability. The reproductive potential of male fish is strongly subjected to androgenic control. Androgens, testosterone (T) and 11-ketotestosterone (11-KT), delivers a broad range of physiological effects in male fish by binding to androgen receptor (AR). The androgens-AR crosstalk is the key factor sustaining male fish reproductive processes. The aim of the study was to investigate the testicular concentration of androgens (T and 11-KT) and the expression of AR gene and protein in different ploidy Cobitis males: C. taenia, C. elongatoides and tetraploids Cobitis during the reproductive season. All the loaches under study have been karyologically verified. The analysis of androgens concentration was based on ELISA test, whereas the AR gene and protein expression was evaluated by real-time PCR and Western blot, respectively. The study revealed the ploidy-dependent testicular concentration of androgens in Cobitis males. Furthermore, the effect of ploidy level on AR gene and protein expression in the testes of Cobitis males has been demonstrated. In general, tetraploid Cobitis males appered to exhibit lower levels of both AR gene and protein expression when compared to diploid Cobitis males. The results may indicate that disturbances in testicular steroidogenesis together with the disorders in androgenic respone may contribute to sterility of tetraploid Cobitis males. However, further studies have to be undertaken to better explore the reproductive physiology of polyploid Cobitis males in order to explain the functioning of diploid-polyploid populations

    Effects of Insecticides and Microbiological Contaminants on Apis mellifera Health

    No full text
    Over the past two decades, there has been an alarming decline in the number of honey bee colonies. This phenomenon is called Colony Collapse Disorder (CCD). Bee products play a significant role in human life and have a huge impact on agriculture, therefore bees are an economically important species. Honey has found its healing application in various sectors of human life, as well as other bee products such as royal jelly, propolis, and bee pollen. There are many putative factors of CCD, such as air pollution, GMO, viruses, or predators (such as wasps and hornets). It is, however, believed that pesticides and microorganisms play a huge role in the mass extinction of bee colonies. Insecticides are chemicals that are dangerous to both humans and the environment. They can cause enormous damage to bees’ nervous system and permanently weaken their immune system, making them vulnerable to other factors. Some of the insecticides that negatively affect bees are, for example, neonicotinoids, coumaphos, and chlorpyrifos. Microorganisms can cause various diseases in bees, weakening the health of the colony and often resulting in its extinction. Infection with microorganisms may result in the need to dispose of the entire hive to prevent the spread of pathogens to other hives. Many aspects of the impact of pesticides and microorganisms on bees are still unclear. The need to deepen knowledge in this matter is crucial, bearing in mind how important these animals are for human life

    Immunolocalization of Aquaporin-1, -5, and -7 in the Avian Testis and Vas Deferens

    No full text
    Thirteen mammalian aquaporin (AQP) isoforms have been identified, and they have a unique tissue-specific pattern of expression. AQPs have been found in the reproductive system of both male and female humans, rats, and mice. However, tissue expression and cellular and subcellular localization of AQPs have been poorly investigated in the male reproductive system of birds. The localization of AQP subtypes (AQP1, 2, 3, 4, 5, 7, 8, 9, and 11) in the goose testis and vas deferens has been studied through immunohistochemistry and immunobloting. Interestingly, the testicular and deferential tissues were positive for AQP1, -5, and -7 but not the others. AQP1 immunoreactivity was detected in the capillary endothelial cells of testis and vas deferens. AQP5 was localized in the interstitial tissue of the testis, including Leydig cells, as well as in the basal cells of vas deferens. Double-labeling confocal microscopy revealed coexpression of AQP5 with capillary AQP1 in the testis. AQP7 was expressed in elongated spermatid and spermatozoa tails in the testis, as well as spermatozoa tails in the vas deferens. These results suggest that several subtypes of AQPs are involved in the regulation of water homeostasis in the goose male reproductive system. (J Histochem Cytochem 57:915–922, 2009
    corecore