background: klc3 protein as a member of the kinesin light-chain protein family plays an important role in spermatogenesis, during formation of mitochondrial sheath in the mid piece of the sperm tail. objective: this study for the first time aims to compare the expression of the klc3 gene between fertile and infertile individuals. materials and methods: semen samples were collected from 19 ferti...

context air pollution is common in all countries and affects reproductive functions in men and women. it particularly impacts sperm parameters in men. this meta-analysis aimed to examine the impact of air pollution on the quality of sperm. conclusions the results of this meta-analysis showed that air pollution reduces sperm motility, but has no impact on the other sperm parameters of spermogram...

Little is known about the molecular impact of in vivo exposure to endocrine disruptors (EDs) on sperm structures and functions. We recently reported that the lifelong exposure of rats to the antiandrogenic compound vinclozolin results in low epididymal weight, changes in sperm kinematic parameters, and immature sperm chromatin condensation, together with the impairment of several fertility end ...

Background: The application of laparoscopic method for intrauterine insemination is limited in sheep industry by the high cost of equipment and low pregnancy rate of frozen-thawed spermatozoa. Both disadvantages could be decreased if chilled ram semen is transported to the farms and inseminated through cervix. Semen extender provides the requirements for sperm and affects its motility, viabilit...

The present study was designed to evaluate kinematic response of sperm cell to low-density lipoproteins (LDL) in fresh diluted, short-term (4°C) or long-term (-196°C) stored semen. Four healthy bucks of similar age and weight were selected as semen donor. The semen was collected twice a week using artificial vagina. The semen after initial evaluation was pooled and divided into three aliquots, ...

BACKGROUND Sperm parameters and motion kinetics are affected by cryopreservation. OBJECTIVE The main purpose of the current study was to determine the effect of different concentrations of Trolox as an antioxidant to freezing-thawing procedure on human sperm kinematic parameter. MATERIALS AND METHODS Semen was collected from 20 normal donors and divided into five aliquots prior to cryoprese...

Objectives: The aim of this study was to extract suitable spatiotemporal and kinematic parameters to determine how Total Knee Replacement (TKR) alters patients’ knee kinematics during gait, using a rapid and simplified quantitative two-dimensional gait analysis procedure. Methods: Two-dimensional kinematic gait pattern of 10 participants were collected before and after the TKR surgery,...

Kinematic parameters were evaluated in mouse epididymal extracts to monitor maturation of sperm movement in animals exposed to static magnetic fields using the Sperm-Class Analyzer computerized image analysis system. For this purpose, animals were exposed to a field of 0.7 T generated by a permanent magnet over 10 or 35 days for either 1 or 24 hr/day. The values of the motion endpoints were sim...

in this article a new and an accurate method for kinematic and dynamic analysis of a parallel robot 3prs and a hybrid robot (parallel and serial) 3prs-rrp are presented, which is based on the denavit-hartenberg transformation matrix algebra. first, basic properties of various kinds of robots are compared, and then the denavit-hartenberg parameters and their table are introduced. next, the metho...

This paper proposes a new notation for kinematic structures which allows a unified description of serial, parallel, and hybrid robots or articulated machine tools. During the past decades, the well-known Denavit-Hartenberg parameters have been used widely to describe serial kinematics of robots in science and industry. Till now, such a common notation for parallel manipulators has not yet been ...