0
We're unable to sign you in at this time. Please try again in a few minutes.
Retry
We were able to sign you in, but your subscription(s) could not be found. Please try again in a few minutes.
Retry
There may be a problem with your account. Please contact the AMA Service Center to resolve this issue.
Contact the AMA Service Center:
Telephone: 1 (800) 262-2350 or 1 (312) 670-7827  *   Email: subscriptions@jamanetwork.com
Error Message ......
ARTICLE |

A SEASONAL TIDE OF BLOOD PHOSPHATE IN INFANTS

ALFRED F. HESS, M.D.; MARION A. LUNDAGEN, A.B.
JAMA. 1922;79(27):2210-2212. doi:10.1001/jama.1922.02640270008005.
Text Size: A A A
Published online

An investigation1 undertaken somewhat more than a year ago showed that in infants the inorganic phosphate of the blood could be raised to the normal level by means of frequent exposures to the sun's rays. It was shown later2 that the same result can be accompushed by irradiation with the carbon arc lamp. It seemed probable that this striking phenomenon—chemical equilibrium brought about by the action of light— is due to the ultraviolet, rather than to the visible rays of the spectrum. As a matter of fact, subsequent investigation has confirmed the view that some ultraviolet radiations possess this biologic action, for when they are filtered out from the spectrum the rays lose this power.3 As is well known, the composition of the rays of the sun is not at all times the same. There is a marked seasonal variation in its spectrum—in the temperate zone

Topics

Sign in

Create a free personal account to sign up for alerts, share articles, and more.

Purchase Options

• Buy this article
• Subscribe to the journal

First Page Preview

View Large
First page PDF preview

Figures

Tables

References

Letters

CME
Meets CME requirements for:
Browse CME for all U.S. States
Accreditation Information
The American Medical Association is accredited by the Accreditation Council for Continuing Medical Education to provide continuing medical education for physicians. The AMA designates this journal-based CME activity for a maximum of 1 AMA PRA Category 1 CreditTM per course. Physicians should claim only the credit commensurate with the extent of their participation in the activity. Physicians who complete the CME course and score at least 80% correct on the quiz are eligible for AMA PRA Category 1 CreditTM.
Note: You must get at least of the answers correct to pass this quiz.
You have not filled in all the answers to complete this quiz
The following questions were not answered:
Sorry, you have unsuccessfully completed this CME quiz with a score of
The following questions were not answered correctly:
Commitment to Change (optional):
Indicate what change(s) you will implement in your practice, if any, based on this CME course.
Your quiz results:
The filled radio buttons indicate your responses. The preferred responses are highlighted
For CME Course: A Proposed Model for Initial Assessment and Management of Acute Heart Failure Syndromes
Indicate what changes(s) you will implement in your practice, if any, based on this CME course.

Multimedia

Some tools below are only available to our subscribers or users with an online account.

Sign in

Create a free personal account to sign up for alerts, share articles, and more.

Purchase Options

• Buy this article
• Subscribe to the journal

Related Content

Customize your page view by dragging & repositioning the boxes below.

Jobs
brightcove.createExperiences();