scholarly journals The Effect of Photoperiod Duration Upon the Respiratory Activity of the Roots of Wheat Seedlings

1966 ◽  
Vol 19 (3) ◽  
pp. 471 ◽  
Author(s):  
TF Neales ◽  
JA Davies
Keyword(s):  
Circadian Rhythm ◽  
Respiration Rate ◽  
High Intensity ◽  
Root Respiration ◽  
Respiratory Activity ◽  
Controlled Environment ◽  
Wheat Seedlings ◽  
Co2 Output ◽  
Two Peaks ◽  
High Intensity Light

The root respiration rate of wheat seedlings was continuously measured (in terms of CO2 output) in a controlled environment. The effects of varying photoperiods of high intensity light, incident on the leaves, upon the rate of root respiration were studied. It was demonstrated that increases in root respiration rate occurred in response to the light treatments. The fluctuations in root respiration rate, induced by the photoperiods used, had a pattern over the 24-hr cycle, which included two peaks-when the photoperiod was of 6 or 12 hr duration. These henomena are discussed in relation to the hypothesis that root respiration rate fluctuates in response to a varying flow of assimilates from the leaves to the roots. No evidence was obtained of an endogenous (or circadian) rhythm of root respiration rate.

Time resolving diagnostic of the compensation process of pulsed ion beams at high-intensity light ion source

2000 ◽  
Vol 71 (2) ◽  
pp. 1107-1109 ◽  
Author(s):  
A. Jakob ◽  
P-Y. Beauvais ◽  
R. Gobin ◽  
H. Klein ◽  
J-L. LeMaire ◽  
...  
Keyword(s):  
High Intensity ◽  
Ion Beams ◽  
Ion Source ◽  
Compensation Process ◽  
High Intensity Light

Associations of Low- and High-Intensity Light Activity with Cardiometabolic Biomarkers

2015 ◽  
Vol 47 (10) ◽  
pp. 2093-2101 ◽  
Author(s):  
BETHANY HOWARD ◽  
ELISABETH A. H. WINKLER ◽  
PARNEET SETHI ◽  
VALERIE CARSON ◽  
NICOLA D. RIDGERS ◽  
...  
Keyword(s):  
High Intensity ◽  
Light Activity ◽  
High Intensity Light

scholarly journals Efficacy of new microprocessed phototherapy system with five high intensity light emitting diodes (Super LED)

2007 ◽  
Vol 83 (3) ◽  
pp. 253-258 ◽  
Author(s):  
Bianca M. R. Martins ◽  
Manoel de Carvalho ◽  
Maria E. L. Moreira ◽  
José M. A. Lopes
Keyword(s):  
High Intensity ◽  
Light Emitting Diodes ◽  
Light Emitting ◽  
High Intensity Light

Centers for Disease Control-type light traps equipped with high-intensity light-emitting diodes as light sources for monitoring Anopheles mosquitoes

Acta Tropica ◽  
2018 ◽  
Vol 183 ◽  
pp. 61-63 ◽  
Author(s):  
Benedita Maria Costa-Neta ◽  
Abdias Ribeiro Lima-Neto ◽  
Apoliana Araújo da Silva ◽  
Jefferson Mesquita Brito ◽  
João Vitor Castro Aguiar ◽  
...  
Keyword(s):  
Disease Control ◽  
High Intensity ◽  
Light Emitting Diodes ◽  
Light Sources ◽  
Light Traps ◽  
Light Emitting ◽  
Anopheles Mosquitoes ◽  
Centers For Disease Control ◽  
High Intensity Light

scholarly journals Microleakage under Orthodontic Brackets Using High-Intensity Curing Lights

2009 ◽  
Vol 79 (1) ◽  
pp. 144-149 ◽  
Author(s):  
Mustafa Ulker ◽  
Tancan Uysal ◽  
Sabri Ilhan Ramoglu ◽  
Huseyin Ertas
Keyword(s):  
High Intensity ◽  
Light Emitting Diode ◽  
Bonferroni Correction ◽  
Light Emitting ◽  
Halogen Light ◽  
Halogen Light Source ◽  
Light Curing ◽  
Curing Light ◽  
High Intensity Light ◽  
Nail Varnish

Abstract Objective: To compare the microleakage of the enamel-adhesive-bracket complex at the occlusal and gingival margins of brackets bonded with high-intensity light curing lights and conventional halogen lights. Materials and Methods: Forty-five freshly extracted human maxillary premolar teeth were randomly separated into three groups of 15 teeth each. Stainless steel brackets were bonded in all groups according to the manufacturer's recommendations. Specimens (15 per group) were cured for 40 seconds with a conventional halogen light, 20 seconds with light-emitting diode (LED), and 6 seconds with plasma arc curing light (PAC). After curing, the specimens were further sealed with nail varnish, stained with 0.5% basic-fuchsine for 24 hours, sectioned and examined under a stereomicroscope, and scored for microleakage for the enamel-adhesive and bracket-adhesive interfaces from both the occlusal and gingival margins. Statistical analyses were performed using Kruskal-Wallis and Mann-Whitney U-tests with a Bonferroni correction. Results: The type of light curing unit did not significantly affect the amount of microleakage at the gingival or occlusal margins of investigated interfaces (P >.05). The gingival sides in the LED and PAC groups exhibited higher microleakage scores compared with those observed on occlusal sides for the enamel-adhesive and adhesive-bracket interfaces. The halogen light source showed similar microleakage at the gingival and occlusal sides between both adhesive interfaces. Conclusions: High-intensity curing units did not cause more microleakage than conventional halogen lights. This supports the use of all these curing units in routine orthodontic practice.

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