Browsing Prof. Ralf Henkel by Author "Henkel, Ralf"
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Bibliometrics: tracking research impact by selecting the appropriate metrics
Henkel, Ralf (Medknow Publications, 2016)Traditionally, the success of a researcher is assessed by the number of publications he or she publishes in peer-reviewed, indexed, high impact journals. This essential yardstick, often referred to as the impact of a ... -
Effect of the metabolic syndrome on male reproductive function: a case-controlled pilot study
Leisegang, Kristian; Bouic, Patrick J.D.; Henkel, Ralf (Wiley, 2014)The metabolic syndrome (MetS) is a constellation of various risk factors. This study aimed to investigate the effect of MetS on testosterone and progesterone, and semen parameters, in a case-controlled pilot study. Male ... -
Green nanotechnology as an innovative drug delivery approach for typha capensis and naringenin—new class of phytochemical embedded biocompatible gold nanoparticles in prostate cancer therap
Henkel, Ralf; Pearce, Keenau (Journal of Drug Delivery Science and Technology, 2022)Naringenin, a flavone with a growing body of evidence as an anti-cancer agent, is found in Typha capensis, an indigenous South African plant commonly used in traditional medicine. However, despite favourable in vitro ... -
The impact of Covid-19 vaccines on male semen parameters: A retrospective cohort study
Henkel, Ralf; Leisegang, Kristian; Finelli, Renata (University of the Western Cape, 2023)The emergence of SARS-CoV-2 and the subsequent COVID-19 pandemic necessitated the development of adequate vaccines. Despite vaccines being demonstrated to be safe and effective for preventing severe disease and death, ... -
The impact of male overweight on semen quality and outcome of assisted reproduction
Leisegang, Kristian; Henkel, Ralf (Medknow Publications, 2014)The impact of obesity on male reproductive health remains a contested topic as evidence is inconclusive and inconsistent. Even more debatable is the effect of male obesity in assisted reproduction. In the manuscript, ... -
The impact of mitochondrial impairments on sperm function and male fertility: a systematic revie
Henkel, Ralf; Raad, Minoo Vahedi (BMC, 2024)Background Besides adenine triphosphate (ATP) production for sustaining motility, the mitochondria of sperm also host other critical cellular functions during germ cell development and fertilization including calcium ... -
Inorganic ions in leonotis leonurus extract do not explain changes in isolated Wistar rat heart function
Burger, Andries; Mugabo, Pierre; Henkel, Ralf; Green, Ivan (Open Access Science Research Publisher, 2011)Leonotis leonurus (L. leonurus) R. Br (Lamiaceae) is used by healers in South Africa. The present study was conducted to determine if the L. leonurus effect on isolated rat heart is due to ionic changes in the perfusion fluid. -
Male age and progressive sperm motility are critical factors affecting embryological and clinical outcomes in oocyte donor ICSI cycles
Henkel, Ralf (Reproductive Sciences, 2021)This retrospective cohort study aimed to explore whether paternal age and semen quality parameters affect the embryological and clinical outcomes of ICSI with oocyte donation. A total of 339 oocyte donation (OD)-ICSI cycles ... -
Obesity is associated with increased seminal insulin and leptin alongside reduced fertility parameters in a controlled male cohort
Leisegang, Kristian; Menkveld, Roelof; Bouic, Patrick J.D.; Henkel, Ralf (BioMed Central, 2014)Obesity appears to be associated with male reproductive dysfunction and infertility, although this has been inconsistent and inconclusive. Insulin and leptin are known mediators and modulators of the hypothalamus-pituitary-testes ...