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Between Babel and Beast
(America and Empires in Biblical Perspective)
The Glory of Kings: A Festschrift for James B. Jordan
Fyodor Dostoevsky
(Christian Encounters Series)
Athanasius
(Foundations of Theological Exegesis and Christian Spirituality)
The Four: A Survey of the Gospels
Defending Constantine: The Twilight of an Empire and the Dawn of Christendom
From Behind the Veil: The Epistles of John
Deep Exegesis:The Mystery of Reading Scripture
1 & 2 Kings
Brazos Theological Commentary
The Promise Of His Appearing: An Exposition Of Second Peter
A Great Mystery: Fourteen Wedding Sermons
Deep Comedy: Trinity, Tragedy, And Hope In Western Literature
Miniatures & Morals: The Christian Novels of Jane Austen
The Priesthood of the Plebs: A Theology of Baptism
A Son To Me: An Exposition of 1 & 2 Samuel
From Silence to Song: The Davidic Liturgical Revolution
Ascent to Love: A Guide to Dante's Divine Comedy
Blessed Are the Hungry: Meditations on the Lord's Supper
A House For My Name: A Survey of the Old Testament
Heroes of the City of Man: A Christian Guide to Select Ancient Literature
Brightest Heaven of Invention: A Christian Guide To Six Shakespeare Plays
Wise Words: Family Stories That Bring the Proverbs to Life
The Kingdom and the Power: Rediscovering the Centrality of the Church
A recent article in the widely read journal, Radiation Protection Dosimetry (150 [2012] 278-82) provides one more reason, as if one were needed, to grow a beard.
The abstract reads: “A dosimetric technique has been employed to establish the amount of erythemal ultraviolet radiation (UVR) protection provided by facial hair considering the influence of solar zenith angle (SZA) and beard–moustache length. The facial hair reduced the exposure ratios (ERs) to approximately one-third of those to the sites with no hair. The variation in the ERs over the different sites was reduced compared with the cases with no beard. The ultraviolet protection factor (UPF) provided by the facial hair ranged from 2 to 21. The UPF decreases with increasing SZA. The minimum UPF was in the 53–62° range. The longer hair provides a higher UPF at the smaller SZA, but the difference between the protection provided by the longer hair compared with the shorter hair reduces with increasing SZA. Protection from UVR is provided by the facial hair; however, it is not very high, particularly at the higher SZA.”
Thanks to my son, Woelke, for the reference.
posted by Peter J. Leithart on Friday, August 3, 2012 at 8:35 am
Permission is given to use material on this site, provided the source is cited, blog entries are republished in full, and the author is notified in advance.
