Navigation Links
Exposure to early evening sunlight in spring creates teenage night owls
Date:7/26/2010

with the 24-hour solar day. Daylight is rich in short-wavelength (blue) light, which maximally stimulates our biological clock. This internal clock is responsible for regulating the timing of our sleep and other daily biological cycles, called circadian rhythms.

The results of the Algonquin Middle School study demonstrated that it was the extended daylight hours due to the seasonal change, not evening electric lighting after dark in the home, that had the biggest impact on delayed sleeping patterns. According to Figueiro, these results underscore the importance of measuring the 24-hour circadian light and dark patterns in order to draw valid inferences from field studies of this kind.

"This latest study supplements previous work and supports the general hypothesis that the entire 24-hour pattern of light/dark exposure influences synchronization of the body's circadian clock with the solar day and thus influences teenagers' sleep/wake cycles," explains Figueiro. "As a general rule, teenagers should increase morning daylight exposure year round and decrease evening daylight exposure in the spring to help ensure they will get sufficient sleep before going to school."

Measuring "Circadian Light"

In the study, the Algonquin Middle School students were exposed to significantly more "circadian light" in the early evening during spring than in winter, resulting in both delayed melatonin onset and shorter self-reported sleep durations. Each subject wore a Daysimeter, a small, head-mounted device developed by the LRC to measure an individual's exposure to daily "circadian light," as well as rest and activity patterns. The definition of circadian light is based upon the potential for light to suppress melatonin synthesis at night, as opposed to measuring light in terms of how it stimulates the visual system.

This study, sponsored by the U.S. Green Building Council (USGBC) and, in part, by a grant from a Trans-National Insti
'/>"/>

Contact: Mary Cimo
cimom@rpi.edu
518-687-7174
Rensselaer Polytechnic Institute
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Exposure to secondhand smoke in the womb has lifelong impact
2. Leaded gasoline predominant source of lead exposure in latter 20th century
3. Prenatal exposure to BPA and DES may increase breast cancer risk
4. Experimental treatment protects monkeys from lethal Ebola virus post-exposure
5. Pesticide exposure may contribute to ADHD
6. Researchers find melanoma not caused by early UVA light exposure
7. Study: Carbon monoxide exposure can be reduced during routine anesthesia in kids
8. UV exposure has increased over the last 30 years, but stabilized since the mid-1990s
9. Mothers exposure to bisphenol A may increase childrens chances of asthma
10. Duke awarded up to $43 million to develop test for dirty bomb/radiation exposure
11. Exposure to young triggers new neuron creation in females exhibiting maternal behavior
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/1/2015)... -- NXT-ID, Inc. (NASDAQ: NXTD ) ("NXT-ID" or the ... mobile commerce market, announces the second shipment of a ... early access pre-order customers. Feedback from ... including Walmart, Target, AT&T, Dunkin, Donuts, Stop & Shop ... all outlets and very easy to use. Several users ...
(Date:4/1/2015)... 2015   Medisafe ™, the leading global medication ... iOS and Android smartphones and tablets, ... the platform to allow patients to track and correlate ... time, patients will be able to visualize in real-time ... biometrics, such as glucose levels and blood pressure. ...
(Date:3/31/2015)... -- Elephant Talk Communications Corp. (NYSE MKT: ETAK) ("Elephant Talk" ... Network Architecture (ET Software DNA® 2.0) platforms and cyber ... million for the year ended December 31, 2014 as ... ended December 31, 2013. At the ... multi-year transition away from its legacy landline business to ...
Breaking Biology News(10 mins):NXT-ID Reports Second Shipment of Wocket Smart Wallets Underway to Early Access Pre-order Customers and Provides User Feedback 2NXT-ID Reports Second Shipment of Wocket Smart Wallets Underway to Early Access Pre-order Customers and Provides User Feedback 3NXT-ID Reports Second Shipment of Wocket Smart Wallets Underway to Early Access Pre-order Customers and Provides User Feedback 4Medisafe Announces Launch of Biometric Integration, Enabling Patients to Stay Adherent to Their Meds and See Tangible Health Results 2Elephant Talk Reports 2014 Fourth Quarter and Year End Financial Results 2Elephant Talk Reports 2014 Fourth Quarter and Year End Financial Results 3Elephant Talk Reports 2014 Fourth Quarter and Year End Financial Results 4Elephant Talk Reports 2014 Fourth Quarter and Year End Financial Results 5Elephant Talk Reports 2014 Fourth Quarter and Year End Financial Results 6
... 2012 Childhood Obesity , a peer-reviewed journal from Mary ... dedicated to the role that schools can and should ... eating habits to help stem the tide of the ... provides comprehensive coverage of food policy, systems, and programs ...
... becomes extinct, other predatory species could soon follow, according to ... a University of Exeter team has now carried out the ... 2012) in the Royal Society journal Biology Letters , ... can indirectly cause another to become extinct. The University of ...
... Biofuels and Texas AgriLife Research, part of The Texas ... develop and commercialize cellulosic feedstocks for the production of ... diverse high biomass energy crop breeding program and BP ... companies growing commercial-scale biomass crops for liquid fuels. ...
Cached Biology News:School food -- on the front line in the fight against childhood obesity 2Study proves that 1 extinction leads to another 2BP Biofuels, Texas AgriLife Research sign agreement to advance biofuel feedstock development 2
(Date:4/1/2015)... and NEW YORK , ... (NASDAQ:  PTBI), a biopharmaceutical company advancing protein biologic ... an overview of the Company,s 2014 achievements and ... below demonstrate the progress the Company has made ... corporate partnerships for its MuGard programs, the FDA ...
(Date:4/1/2015)... NEW YORK CITY and LONDON ... of market research reports and solutions, MarketResearch.com is pleased to ... will be a year of market growth and opportunity for ... stem cell company or cord blood bank, competing in the ... market conditions, predict industry trends, and act on market changes ...
(Date:4/1/2015)... OXFORD, England , April 1, 2015 /PRNewswire/ ... world-leading biotechnology company developing novel biological drugs to ... today pleased to announce the appointment of ... Coughlin will be responsible for providing medical and ... for the Company. Dr. Coughlin has ...
(Date:3/31/2015)... 2015 Eastern Kentucky University is ... bachelor’s of criminal justice degree programs by Nonprofitcollegesonline.com. ... inspiring ideas and high quality educational opportunities,” Editor ... University. We are confident that students will find ... is the site’s first “Students before Profits” list, ...
Breaking Biology Technology:PlasmaTech Biopharmaceuticals Provides Strategic Update for 2015 and Review of 2014 Acheivements 2PlasmaTech Biopharmaceuticals Provides Strategic Update for 2015 and Review of 2014 Acheivements 3PlasmaTech Biopharmaceuticals Provides Strategic Update for 2015 and Review of 2014 Acheivements 4PlasmaTech Biopharmaceuticals Provides Strategic Update for 2015 and Review of 2014 Acheivements 5PlasmaTech Biopharmaceuticals Provides Strategic Update for 2015 and Review of 2014 Acheivements 6MarketResearch.com: "Blockbuster" Year for Stem Cells Creates Market Opportunities, Says BioInformant Worldwide Report 2MarketResearch.com: "Blockbuster" Year for Stem Cells Creates Market Opportunities, Says BioInformant Worldwide Report 3MarketResearch.com: "Blockbuster" Year for Stem Cells Creates Market Opportunities, Says BioInformant Worldwide Report 4Immunocore Appoints Dr. Christina Coughlin as Chief Medical Officer 2Immunocore Appoints Dr. Christina Coughlin as Chief Medical Officer 3Immunocore Appoints Dr. Christina Coughlin as Chief Medical Officer 4EKU Ranked in Top 50 Among Online Criminal Justice Degrees 2
... Memory,Pharmaceuticals Corp. (Nasdaq: MEMY ) today ... the Company,s request for an,extension until December 3, ... market capitalization requirement of $35 million or the ... order to remain,listed. There can be no assurance ...
... Aortic ... Aneurysms, ... of Vascular Surgery was the first to implant, in,Phoenix, the Powerlink ... aortic aneurysms (AAA). The procedure was,performed at Arizona Heart Hospital by ...
... BOSTON, Oct. 31 PAREXEL International,Corporation (Nasdaq: ... at the,Oppenheimer 19th Annual Healthcare Conference in New ... Financial Officer will be making,a formal presentation on ... 3,2008., The presentation will be available under ...
Cached Biology Technology:Memory Pharmaceuticals Granted Extension to Comply with NASDAQ Listing Requirements 2Arizona Heart Institute First to Implant Powerlink XL in Phoenix, Arizona Since FDA Approval 2Arizona Heart Institute First to Implant Powerlink XL in Phoenix, Arizona Since FDA Approval 3PAREXEL International to Present at Oppenheimer 19th Annual Healthcare Conference 2
QPRT Immunogen: QPRT (NP_055113, 198 a.a. ~ 298 a.a) partial recombinant protein with GST tag. Storage: -20 C, Avoid Freeze/Thaw Cycles *Available for distribution in the US only...
...
Rabbit polyclonal to XTP4 ( Abpromise for all tested applications). entrezGeneID: 84299 SwissProtID: Q9BRT3...
...
Biology Products: