Update on male reproductive endocrinology.

Practitioners of male reproductive and sexual medicine must have an intimate understanding of the physiology of male reproductive endocrinology, as such a knowledge is the cornerstone on which hormonal treatments are based. In this review, we highlight what is known about male reproductive endocrine physiology and the various control mechanisms for the system. We also discuss the limitations of our current understanding of the reproductive physiology. We hope that this review is helpful for male reproductive medicine practitioners in understanding the principles on which hormonal treatments are based

Evidence for a change of chemical composition of the primary cosmic radiation and a possible cause

Evidence for chemical composition changes in primary cosmic ray flux at high energie

The fluctuation origin of cosmic radiation

Particle acceleration within turbulent region for analysis on fluctuation origin of cosmic radiatio

The coral fauna of the Midway Eocene of Texas

The coral fauna of the Midway Eocene of Texas includes thirteen separate species and varieties. Only two of the species, each represented in a single locality by a single specimen, belong to the colonial types. The remaining eleven species, containing probably 95 per cent of the specimens, are all of solitary forms. Evidently the Texas Midway seas did not afford conditions favorable to the growth of reef-building corals

The antiproton component of the primary cosmic ray flux

Solution of Fokker-Planck diffusion equation in intensity prediction of antiproton component of primary cosmic ray flu

Servo-controlled intravital microscope system

A microscope system is described for viewing an area of a living body tissue that is rapidly moving, by maintaining the same area in the field-of-view and in focus. A focus sensing portion of the system includes two video cameras at which the viewed image is projected, one camera being slightly in front of the image plane and the other slightly behind it. A focus sensing circuit for each camera differentiates certain high frequency components of the video signal and then detects them and passes them through a low pass filter, to provide dc focus signal whose magnitudes represent the degree of focus. An error signal equal to the difference between the focus signals, drives a servo that moves the microscope objective so that an in-focus view is delivered to an image viewing/recording camera

Ergogenic Effect of Neuromuscular Electrical Stimulation During Rest and Submaximal Exercise

International Journal of Exercise Science 12(3): 203-213, 2019. The primary aim of this investigation was to determine the ergogenic effect of neuromuscular electrical stimulation (NMES) amongst twenty apparently healthy males during submaximal exercise. In Session 1, 20 participants (Age = 35.0 ± 15.0 yrs; Height = 179.9 ± 8.5 cm; Body Mass = 85.4 ± 12.0 kg) were familiarized with all equipment. Sessions 2-4 included the following randomized 5-min trials a) Rest and Rest+NMES, b) Rest, Arms-Only, Arms+NMES, and c) Rest, Arms+Legs, Arms+Legs+NMES. Physiological variables collected during rest and submaximal exercise were volume of oxygen (VO2), heart rate (HR), systolic and diastolic blood pressure (SBP and DBP), respiratory exchange ratio (RER), and rate pressure product (RPP). Paired sample t-test was used to determine significant mean differences between the NMES and non-NMES trials. Bonferroni post-hoc analysis established alpha at 0.008. From the 18 paired t-tests, the only observed significant mean difference (t(19) = -6.4, p \u3c 0.001) was RER values between the Arms-Only trial compared to the Arms+NMES trial (0.94 and 1.00, respectively). While RER displayed a significant difference, from a practical perspective, however, these differences were deemed non-physiologically significant. Viewed in concert, findings from this study suggests that NMES utilization does not evoke an acute ergogenic effect amongst an apparently healthy male population

CELEBRATION OF JOHN MARSHALL DAY IN CONNECTICUT

It would seem almost an impertinence, before an of audience lawyers, lawyers in praesenti et in futuro, if I should remind you that in the year 1899, at its annual session, the American Bar Association recommended the celebration of this day as the hundredth anniversary of the inauguration of John Marshall as Chief Justice of the Supreme Court of the United States. And, by the way, it may interest us to recall the fact that his immediate predecessor in this high office was Oliver Ellsworth, of Connecticut