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Visar resultat 1 - 5 av 25 uppsatser som matchar ovanstående sökkriterier.

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

    Master-uppsats, SLU/Dept. of Clinical Sciences

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

    Sammanfattning : 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. LÄS MER

  3. 2. Effect of seminal plasma on the acrosome status of cryopreserved stallion spermatozoa

    Uppsats för yrkesexamina på avancerad nivå, SLU/Dept. of Clinical Sciences

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

    Sammanfattning : 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. LÄS MER

  4. 3. CRYOPRESERVATION OF HUMAN BLASTOCYSTS, A COMPARISON OF TWO VITRIFICATION AND WARMING KITS

    Kandidat-uppsats, Uppsala universitet/Institutionen för kvinnors och barns hälsa

    Författare :Sara Ottersgård; [2020]
    Nyckelord :Irvine Scientific; Kitazato; human embryos; embryo development; blastocyst scoring;

    Sammanfattning : Infertility is a widespread problem around the world, although the available treatment options constantly improve through research and methodological development. A common treatment option mainly for biologically caused infertility is in-vitro fertilization, where in a menstrual cycle multiple oocytes are stimulated to mature and are then fertilized in a laboratory. LÄS MER

  5. 4. Impact of cryopreservation and characterization of peripheral blood mononuclear cells and subsets in healthy donors by multicolor flow cytometry analysis

    Kandidat-uppsats, Uppsala universitet/Institutionen för kvinnors och barns hälsa

    Författare :Sofie Hellgren; [2020]
    Nyckelord :immune status; immune phenotyping; PBMC; immune regulatory cells; immune therapy; immunstatus; immunfenotypning; mononukleära celler från perifert blod; immunregulatoriska celler; immunterapi;

    Sammanfattning : Introduction: Immune therapy plays a larger role in cancer treatment these days, but in order to find new therapies and improve already existing ones, more knowledge about the immune system is needed. The peripheral blood contains many different cell types, some extensively studied, some less well-known. LÄS MER

  7. 5. Can colloid centrifugation of fresh semen improve post-thaw quality of cryopreserved alpaca spermatozoa?

    Uppsats för yrkesexamina på avancerad nivå, SLU/Dept. of Clinical Sciences

    Författare :Emma Norrestam; [2019]
    Nyckelord :alpaca semen; spermatozoa; cryopreservation; artificial insemination; single layer centrifugation;

    Sammanfattning : .... LÄS MER