Results 271 to 280 of about 638,879 (312)

Can Purifying Natural Selection Preserve Biological Information?

Biological Information, 2013
Most deleterious mutations have very slight effects on total fitness, and it has become clear that below a certain fitness effect threshold, such low-impact mutations fail to respond to natural selection. The existence of such a selection threshold suggests that many low-impact deleterious mutations should accumulate continuously, resulting in ...
Paul Gibson, John R. Baumgardner, Wesley H. Brewer, John C. Sanford   +3 more
openaire   +1 more source

PRESERVATION OF BIOLOGICAL MATERIALS BY FREEZEDRYING

1964
Abstract : The feasibility of freeze-dehydrating biological materials by extracting frozen moisture with dry cryogenic liquids in the presence of dessicants was investigated. Freeze-dehydration of hydrated gelatin capsules in liquid nitrogen and liquid nitrous oxide proceeded too slowly to be evaluated. Dehydration was feasible in ethyl ether and ethyl
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Merthiolate As a Preservative for Biological Products

The Journal of Immunology, 1933
Abstract Introduction. Previous to the fall of 1931 this laboratory produced diphtheria toxoid by formolizing diphtheria toxin having the usual range in potency values. The minimum values of such toxin was that set forth by the National Institute of Health, namely, of an L + value of 0.2 cc. and an m.l.d. value of 0.0025 cc., and maximum
H M Powell, W A Jamieson, F G Jones
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Dental Implants Biological Complications: Tooth Preservation Reevaluated

2019
A common dilemma encountered by dental practitioners is the decision whether to extract a compromised natural tooth and replace it with a dental implant, or to attempt preservation of the natural tooth by endodontic periodontal and restorative treatments.
Carlos E. Nemcovsky, Eyal Rosen
openaire   +1 more source

Preservation of Biological Materials -Principles and Applications-

2003
A heavy demand in the use of living cells and tissues for clinical treatment of diseases, in transfusion and transplantation has generated the need to keep these cells in a viable condition outside the body. In order to achieve this goal, the science of tissue preservation had developed based mostly on the applications of low-temperature storage either
W. J. Yang, S. Mochizuki
openaire   +1 more source

Overview of biological motion preservation

2010
Advanced Cources: Session - Expert 12: Intervertebral ...
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Preserving Biological Material by Plastination

Curator: The Museum Journal, 1984
HARMON C. BICKLEY, FRANK M. TOWNSEND
openaire   +1 more source

Engineered jumpers overcome biological limits via work multiplication

Nature, 2022
Elliot W Hawkes, Charles Xiao, Christopher Keeley   +2 more
exaly  

Biological age is increased by stress and restored upon recovery

Cell Metabolism, 2023
Bohan Zhang, Csaba Kerepesi, Sun Hee Yim
exaly  

Cryo-biological tissue preservation

Plastic and Reconstructive Surgery, 1975
openaire   +1 more source