- 関
- light
WordNet
- of or relating to or caused by light
- very thin and insubstantial; "thin paper"; "light summer dresses"
- make lighter or brighter; "This lamp lightens the room a bit" (同)illume, illumine, light_up, illuminate
- a condition of spiritual awareness; divine illumination; "follow Gods light" (同)illumination
- having abundant light or illumination; "they played as long as it was light"; "as long as the lighting was good" (同)lighting
- (physics) electromagnetic radiation that can produce a visual sensation; "the light was filtered through a soft glass window" (同)visible_light, visible_radiation
- any device serving as a source of illumination; "he stopped the car and turned off the lights" (同)light_source
- the visual effect of illumination on objects or scenes as created in pictures; "he could paint the lightest light and the darkest dark" (同)lightness
- a particular perspective or aspect of a situation; "although he saw it in a different light, he still did not understand"
- a person regarded very fondly; "the light of my life"
- a visual warning signal; "they saw the light of the beacon"; "there was a light at every corner"
- an illuminated area; "he stepped into the light"
- mental understanding as an enlightening experience; "he finally saw the light"; "can you shed light on this problem?"
- public awareness; "it brought the scandal to light"
- (used of color) having a relatively small amount of coloring agent; "light blue"; "light colors such as pastels"; "a light-colored powder" (同)light-colored
- moving easily and quickly; nimble; "the dancer was light and graceful"; "a lightsome buoyant step"; "walked with a light tripping step" (同)lightsome, tripping
- having relatively few calories; "diet cola"; "light (or lite) beer"; "lite (or light) mayonnaise"; "a low-cal diet" (同)lite, low-cal, calorie-free
- less than the correct or legal or full amount often deliberately so; "a light pound"; "a scant cup of sugar"; "regularly gives short weight" (同)scant, short
- (of sleep) easily disturbed; "in a light doze"; "a light sleeper"; "a restless wakeful night" (同)wakeful
- (physics, chemistry) not having atomic weight greater than average; "light water is ordinary water"
- (used of soil) loose and large-grained in consistency; "light soil"
- characterized by or emitting light; "a room that is light when the shutters are open"; "the inside of the house was airy and light"
- demanding little effort; not burdensome; "light housework"; "light exercise"
- designed for ease of movement or to carry little weight; "light aircraft"; "a light truck"
- easily assimilated in the alimentary canal; not rich or heavily seasoned; "a light diet"
- having little importance; "losing his job was no light matter"
- intended primarily as entertainment; not serious or profound; "light verse"; "a light comedy"
- not great in degree or quantity or number; "a light sentence"; "a light accent"; "casualties were light"; "light snow was falling"; "light misty rain"; "light smoke from the chimney"
- of comparatively little physical weight or density; "a light load"; "magnesium is a light metal--having a specific gravity of 1.74 at 20 degrees C"
- of little intensity or power or force; "the light touch of her fingers"; "a light breeze"
- of the military or industry; using (or being) relatively small or light arms or equipment; "light infantry"; "light cavalry"; "light industry"; "light weapons"
- psychologically light; especially free from sadness or troubles; "a light heart"
- lacking light; especially not reached by sunlight; "the aphotic depths of the sea where no photosynthesis occurs"
- a unit of illumination equal to 1 lumen per square centimeter; 10,000 phots equal 1 lux
PrepTutorEJDIC
- 〈U〉『光,光線』;明るさ / 〈U〉夜明け;日中;日光 / 〈C〉『明かり』(太陽・灯火など光を出すもの) / 〈U〉《時にa~》光輝(brightness),(目などの)輝き / 〈C〉(点火するための)火,火花 / 〈C〉明かり採り,採光窓 / 〈C〉《通例単数形で》(絵などの)明るい部分 / 〈U〉(…についての)知識,情報,理解《+『on』+『名』》 / 〈C〉(ものを見る)観点,見地;相 / 〈C〉この世に光を与える人;指導的な人物 / …‘に'『火をつける』《+『up』+『名』+『名』+『up』》 / …‘に'『明かりをつける』,‘を'照らす《+『up』+『名,』+『名』+『up』》 / 〈人〉‘を'明かりをつけて案内する / 〈表情など〉‘を'明るくする《+『up』+『名,』+『名』+『up』》 / 〈物が〉火がつく,点火する;明かりがつく《+『up』》 / 明るくなる,晴れ晴れする《+『up』》 / 『明るい』 / (色が)『薄い』
- (重量が)『軽い』 / (いろいろな事について,その程座・量が)軽い,小さい / 『軽快な』 / 軽装の / 肩のこらない;気軽な / 手軽な,骨の折れなし / (食べ物が)消化のよい,もたれない / ふらふらする,目まいのする / アルコール分の少ない / (パンなどが)ふんわりした / (重量が)軽く / (程度が)軽く,容易に;軽装で
- (車・馬などから)降りる《+『from』+『名』》(alight) / (木などに)〈鳥などが〉止まる《+『on』(『upon』)+『名』》 / (…に)〈打撃・運などが〉突然ふりかかる《+『on』(『upon』)+『名』》
- (深海底のように)光のない,暗やみの
Wikipedia preview
出典(authority):フリー百科事典『ウィキペディア(Wikipedia)』「2014/04/27 03:46:12」(JST)
[Wiki en表示]
Aquatic layers
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Pelagic |
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Photic |
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Epipelagic |
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Aphotic |
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Mesopelagic |
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Bathyalpelagic |
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Abyssopelagic |
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Hadopelagic |
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Demersal |
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Benthic |
Stratification
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Pycnocline |
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Isopycnal |
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Chemocline |
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Halocline |
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Thermocline |
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Thermohaline |
Marine habitats
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Lake stratification
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Aquatic ecosystems
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Wild fisheries
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The photic zone, euphotic zone (Greek for "well lit": εὖ "well" + φῶς "light"), or sunlight zone is the depth of the water in a lake or ocean that is exposed to sufficient sunlight for photosynthesis to occur.
It extends from the surface down to a depth where light intensity falls to one percent of that at the surface, called the euphotic depth. Accordingly, its thickness depends on the extent of light attenuation in the water column. Typical euphotic depths vary from only a few centimetres in highly turbid eutrophic lakes, to around 200 metres in the open ocean. It also varies with seasonal changes in turbidity.
Since the photic zone is where almost all of the primary productivity occurs, the depth of the photic zone is generally proportional to the level of primary productivity that occurs in that area of the ocean. About 90% of all marine life lives in the photic zone. A small amount of primary production is generated deep in the abyssal zone around the hydrothermal vents which exist along some mid-oceanic ridges.
The zone which extends from the base of the euphotic zone to about 200 metres is sometimes called the disphotic zone.[1] While there is some light, it is insufficient for photosynthesis, or at least insufficient for photosynthesis at a rate greater than respiration. The euphotic zone together with the disphotic zone coincides with the epipelagic zone. The bottommost zone, below the euphotic zone, is called the aphotic zone. Most deep ocean waters belong to this zone.
The transparency of the water, which determines the depth of the photic zone, is measured simply with a Secchi disk. It may also be measured with a photometer lowered into the water.
See also
Notes
- ^ Photic zone Encyclopædia Britannica Online. 14 August 2009.
Physical oceanography – Other
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Landforms |
- Abyssal fan
- Abyssal plain
- Atoll
- Bathymetric chart
- Cold seep
- Continental margin
- Continental rise
- Continental shelf
- Contourite
- Hydrography
- Guyot
- Oceanic basin
- Oceanic plateau
- Oceanic trench
- Passive margin
- Seabed
- Seamount
- Submarine canyon
- Coastal geography
- More...
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Plate tectonics |
- Black smoker
- Convergent boundary
- Divergent boundary
- Fracture zone
- Hydrothermal vent
- Marine geology
- Mid-ocean ridge
- Mohorovičić discontinuity
- Vine–Matthews–Morley hypothesis
- Oceanic crust
- Outer trench swell
- Ridge push
- Seafloor spreading
- Slab pull
- Slab suction
- Slab window
- Subduction
- Transform fault
- Volcanic arc
- More...
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Ocean zones |
- Benthic
- Deep ocean water
- Deep sea
- Littoral
- Mesopelagic
- Oceanic zone
- Pelagic
- Photic
- Surf zone
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Sea level |
- Current sea level rise
- Future sea level
- Sea-level curve
- DART
- GLOSS
- NOOS
- OSTM
- WGS
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Acoustics |
- Ocean acoustic tomography
- Sofar bomb
- SOFAR channel
- Underwater acoustics
- Hydroacoustics
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Other |
- Alvin
- Argo
- Benthic lander
- Color of water
- Marginal sea
- Marine energy
- Mooring
- Ocean
- Ocean exploration
- Ocean observations
- Ocean pollution
- Ocean reanalysis
- Ocean surface topography
- Ocean thermal energy conversion
- Oceanography
- Pelagic sediment
- Sea surface microlayer
- Sea surface temperature
- Seawater
- Science On a Sphere
- Thermocline
- Underwater glider
- Water column
- World Ocean Atlas
- NODC
- More...
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UpToDate Contents
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English Journal
- The NPY intergeniculate leaflet projections to the suprachiasmatic nucleus transmit metabolic conditions.
- Saderi N, Cazarez-Márquez F, Buijs FN, Salgado-Delgado RC, Guzman-Ruiz MA, Del Carmen Basualdo M, Escobar C, Buijs RM.SourceLaboratory of Hypothalamic Integration Mechanism, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Apartado Postal 70228, Ciudad Universitaria, 04510 Mexico DF, Mexico; Laboratoriode Biología Celular y Fisiologia, Facultad de Ciencias, Universidad Nacional Autónoma de San Luis Potosí, Lateral Avenida Salvador Nava, 78290 San Luis Potosí (SLP), Mexico.
- Neuroscience.Neuroscience.2013 Aug 29;246:291-300. doi: 10.1016/j.neuroscience.2013.05.004. Epub 2013 May 13.
- The intergeniculate leaflet (IGL) is classically known as the area of the Thalamic Lateral Geniculate Complex providing the suprachiasmatic nucleus (SCN) non-photic information. In the present study we investigated whether this information might be related to the metabolic state of the animal. The f
- PMID 23680526
- Neurological and psychological applications of transcranial lasers and LEDs.
- Rojas JC, Gonzalez-Lima F.SourceDepartments of Psychology, Pharmacology and Toxicology, University of Texas at Austin, Austin, TX 78712, USA; Department of Neurology and Neurotherapeutics, University of Texas Southwestern Medical Center, Dallas, TX 75235, USA.
- Biochemical pharmacology.Biochem Pharmacol.2013 Aug 15;86(4):447-57. doi: 10.1016/j.bcp.2013.06.012. Epub 2013 Jun 24.
- Transcranial brain stimulation with low-level light/laser therapy (LLLT) is the use of directional low-power and high-fluency monochromatic or quasimonochromatic light from lasers or LEDs in the red-to-near-infrared wavelengths to modulate a neurobiological function or induce a neurotherapeutic effe
- PMID 23806754
- Functional and effective connectivity in EEG alpha and beta bands during intermittent flash stimulation in migraine with and without aura.
- de Tommaso M, Stramaglia S, Marinazzo D, Trotta G, Pellicoro M.SourceDipartimento di Neuroscienze e Organi di senso, Università degli Studi di Bari Aldo Moro, Italy.
- Cephalalgia : an international journal of headache.Cephalalgia.2013 Aug;33(11):938-47. doi: 10.1177/0333102413477741. Epub 2013 Feb 25.
- OBJECTIVES: This research was a case-control study to evaluate functional and effective connectivity patterns in ongoing electroencephalography (EEG) under repetitive photic stimulation in the interictal phase of migraine patients with and without aura compared to nonmigraine controls.METHODS: EEG w
- PMID 23439574
Japanese Journal
- 足立 洋,岩井 優依,太田 雅彦,米田 行宏,影山 恭史
- 脳卒中 41(4), 321-323, 2019
- <p><b>要旨</b>:症例は68 歳女性.左視野に青色や赤色,灰色などの光が突然目の前に出現しては数秒後に消えたり,対象物の一部の色が違って見えるといった要素性幻視と考えられる視覚症状が繰り返し生じた.自覚的な視野障害はなかったが,視野検査では左下視野に位置と大きさが左右の眼で若干異なる暗点を認めた.脳MRI では右側の外側膝状体に限局した脳梗塞を認めた.色 …
- NAID 130007683814
- 高橋 明義
- 電気泳動 63(1), 11-14, 2019
- <p>視床下部で産生されるメラニン凝集ホルモン(MCH)と脳下垂体で産生される黒色素胞刺激ホルモン(MSH)は相異なる活性により魚類の体色を調節する.MCHは色素を凝集して体色を明化し,MSHは逆に拡散により暗化する.哺乳類ではMCHとMSHは食欲をそれぞれ亢進および抑制する.魚類におけるMCHとMSHの分泌は背地色の影響を受ける.前者の分泌は白背地で多く黒背地で少ない.後者では逆にな …
- NAID 130007638628
- The Journal of Nihon University School of Dentistry
- Okada Shinji,Iinuma Toshimitsu,Katagiri Ayano,Iwata Koichi,Saito Hiroto,Matsuura Yutaka,Mikuzuki Lou,Sugawara Shiori,Onose Hiroki,Asaka Junichi,Ohara Kinuyo,Lee Jun
- Journal of Oral Science 61(1), 146-155, 2019
- … Thus, it is likely that TG neurons respond to photic stimulation and are involved in photic hypersensitivity. … Therefore, the hypothesis in this study is bright light stimulation enhances the excitability of TG neurons involved in photic hypersensitivity. … Expressions of calcitonin gene-related peptide (CGRP) and neuronal nitric oxide synthase (nNOS) were significantly higher in TG neurons from 5 min to 12 h after photic stimulation of the eye. …
- NAID 130007626634
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★リンクテーブル★
[★]
- 関
- bright、photic、photoradiation、point of view、ray、viewpoint、visible light、visible radiation
[★]
- 英
- light、photic
- 関
- 明るい、見地、軽い、光線
[★]
- 関
- metamorphic、metamorphosis、modification
[★]
- 関
- light stimulation
- 同
- 光賦活法
[★]
- 関
- kyphosis、round back