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Richard K. Zimmer
Researcher at University of California, Los Angeles
Publications - 53
Citations - 2782
Richard K. Zimmer is an academic researcher from University of California, Los Angeles. The author has contributed to research in topics: Sperm & Sperm chemotaxis. The author has an hindex of 25, co-authored 53 publications receiving 2597 citations. Previous affiliations of Richard K. Zimmer include University of Queensland & University of California.
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Journal ArticleDOI
Identification of a testicular odorant receptor mediating human sperm chemotaxis.
Marc Spehr,Günter Gisselmann,Alexandra Poplawski,Jeffrey A. Riffell,Christian H. Wetzel,Richard K. Zimmer,Hanns Hatt +6 more
TL;DR: Results indicate that hOR17-4 functions in human sperm chemotaxis and may be a critical component of the fertilization process, as well as a strong chemoattractant in subsequent behavioral bioassays.
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Chemical signaling processes in the marine environment
TL;DR: There are now vast new opportunities for determining how organisms respond to chemical signals and employ chemical defenses under environmentally realistic conditions, and integrating findings within a larger ecological and evolutionary framework should lead to improved understanding of natural physicochemical phenomena that constrain biological responses at the individual, population, and community levels of organization.
Journal ArticleDOI
Particulate adenylate cyclase plays a key role in human sperm olfactory receptor-mediated chemotaxis.
Marc Spehr,Katlen Schwane,Jeffrey A. Riffell,Jon Barbour,Richard K. Zimmer,Eva M. Neuhaus,Hanns Hatt +6 more
TL;DR: Evidence is provided that hOR17-4 activation is coupled to a cAMP-mediated signaling cascade and particulate AC is required for induction of hOR 17-4-mediated human sperm behavior and represents a promising target for future design of contraceptive drugs.
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Physical constraints on ecological processes: a field test of odor‐mediated foraging
TL;DR: Relationships between hydrodynamic and chemical properties of the environ- ment and foraging success and efficiency suggest that variation in the physicochemical environment can influence the detectability of prey and strategies employed by foragers.
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Sex and flow: the consequences of fluid shear for sperm-egg interactions.
TL;DR: Analytical and numerical models were used to estimate the propulsive force generated by sperm swimming (Fswim) and the shear force produced by fluid motion within the vicinity of a rotating egg (Fshear), and male gametes were modeled as prolate spheroids to explain sperm–egg interactions.