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Showing result 11 - 15 of 103 essays matching the above criteria.

  1. 11. Effects of melatonin and Single Layer Centrifugation on cryosurvival of ram semen samples

    University essay from SLU/Dept. of Clinical Sciences

    Author : Lea Enenkelová; [2021]
    Keywords : sheep reproduction; Jezersko-Solčava sheep breed; colloid centrifugation; melatonin;

    Abstract : The composition of the ram sperm membrane renders it vulnerable to injury during cryopreservation. Production of reactive oxygen species, which are by-products of metabolism, increases during freezing and thawing, causing damage to sperm membranes and acrosomes as well as affecting mitochondrial activity. READ MORE

  3. 12. The influence of antimicrobial agents on the development of antibiotic resistance in the vaginal bacterial flora of artificially inseminated mares : a study on mares in a stud environment

    University essay from SLU/Dept. of Clinical Sciences

    Author : Elin Wilén; [2021]
    Keywords : antibiotics; antimicrobial resistance; bacteriology; breeding; equine reproduction; reproductive techniques; semen extender; stud farm;

    Abstract : In Sweden and in many other countries, artificial insemination (AI) is frequently used in horse breeding. The technology makes it possible to use genetic material from horses in different geographical locations in an effective way, minimizing the risk of infection or even injury to both horses and stud personnel. READ MORE

  4. 13. Toxicity of Pulsed Beams in Radiation Therapy from a Physio-Chemical Perspective

    University essay from Uppsala universitet/Institutionen för fysik och astronomi

    Author : Karin Källén; [2021]
    Keywords : FLASH; radiotherapy; ultra high; dose rates; radiolysis; cancer; medical; FLASH; strålbehandling; ultrahög; doshastighet; radiolys; cancer; medicinsk;

    Abstract : A significant portion of cancer patients receive radiotherapy as part of their curative or palliative treatment plan. Radiotherapy is however greatly limited by radiation induced toxicities in healthy tissue surrounding the tumour, which can lead to long-term or acute complications for a patient. READ MORE

  5. 14. Effect of seminal plasma on the acrosome status of cryopreserved stallion spermatozoa

    University essay from SLU/Dept. of Clinical Sciences

    Author : Michaela Toni; [2021]
    Keywords : acrosome; cryopreservation; artificial insemination; seminal plasma; spermatozoa; equine; stallion; “good freezer”; “bad freezer”; acrosome status; capacitation;

    Abstract : Today breeding through artificial insemination (AI) with cryopreserved semen is frequently used in several domestic species, but its use is more problematic in horses, partly because of reduced sperm quality and partly because the timing of insemination relative to ovulation is more crucial for frozen semen than for fresh. Therefore, improvements in the freezing technique are needed. READ MORE

  6. 15. Effect of experimental warming and assembly history on wood decomposition

    University essay from Mittuniversitetet/Institutionen för naturvetenskap

    Author : Saba Hagos; [2020]
    Keywords : wood decay fungi; species composition; assembly history; warming; temperature; fungal growth; decomposition; carbon dioxide; climate feedbacks; species priority; polypore; microcosm; Norway spruce;

    Abstract : Sammanfattning: Wood decay fungi are the main decomposer of lignocellulose material stored in wood. Thus, all factors that affect them could affect their ecological function. This in return, may affect ecosystem functioning in terms of altered carbon emissions from dead wood. READ MORE