
	Where results make sense

Topic: Phaeophytin

Related Topics

Photosynthetic pigment

In the News (Tue 29 Dec 09)

Northern Trust

Marvin Harrison

Peter Chernin

Gary Locke

Match Play

Penelope Cruz

Mickey Rourke

AR Rahman

Danny Boyle

Hugh Jackman

	Chlorophyll
		The former pathway results in the formation of the molecule, phaeophytin; in the latter pathway, the resulting molecule is termed a chlorophyllide.
		Further degradation of either the phaeophytin or the chlorophyllide produces a molecule termed a phaeophorbide: phaeophytin is degraded by the loss of the phytol tail and a chlorophyllide loses its magnesium ion.
		Apparently the phaeophytin by-product of chlorophyll b has a fluorescence that overlaps significantly with that of phaeophytin a, therefore producing high values for phaeo-pigments.
	dipin.kent.edu /chlorophyll.htm (4595 words)

	Ocean 590 Abstracts (Site not responding. Last check: 2007-10-23)
		Phaeophytin is formed after enzymatic digestion by zooplankton and absorbs at the same wavelength ranges as chlorophyll.
		Phaeophytin concentration may be greater at depth than at the surface because it sinks as fecal pellets or travels out of the photic zone within vertically migrating zooplankton.
		Changes in slope in salinity and temperature profiles indicate stratification of different layers (fresh vs. salt water, warm vs. cold water); constant slopes indicate that the water is well mixed (2-8 b.).
	www.ocean.washington.edu /courses/oc590/abstracts/ayoub.html (448 words)

	Microbiological Analyses and 'Bench Biology'
		Phaeophytin is a breakdown product of chlorophyll and the ratio of chlorophyll to phaeophytin provides information of the health of the algal population.
		During rapid growth, the proportion of phaeophytin is low.
		During periods of decline, such as follows prolonged cloudy weather or exposure of the algae to toxic substances, the proportion of phaeophytin is high.
	www.dep.state.fl.us /labs/biology/microbio.htm (507 words)

	GrokFood - CHLOROPHYLLS - Joint FAO/WHO Expert Committee on Food Additives (JECFA)
		Content of total combined phaeophytins and their magnesium complexes is not less than 10%.
		Phaeophytin a = -4.89 A (649.8 nm) + 0.0549 A (628.2 nm)
		Phaeophytin b = -71.0 A (649.8 nm) + 2.51 A (628.2 nm)
	www.grokfood.com /jecfa/additive_0124.htm (569 words)

	Phaeophytin - Wikipedia, the free encyclopedia
		Phaeophytin is a grey pigment that appears in chromatographs of photosynthetic pigments.
		Phaeophytin has the same structure as chlorophyll; excluding the central magnesium ion, which is replaced by two protons.
		This page was last modified 09:07, 16 June 2006.
	en.wikipedia.org /wiki/Phaeophytin (62 words)

	[No title]
		Nutrient (nitrate, nitrite, silicate and orthophosphate) and pigment (chlorophylls and phaeophytin) concentrations in the upper 200 m were determined for 193 casts during the Alis COARE participation.
		Chlorophyll and phaeophytin concentrations were determined after extraction with methanol (95%) for 15 to 20 minutes with a Turner fluorometer.
		It should be noted that due to some malfunctioning of the fluorometer, certain values that correspond with high percentage of phaeophytin in the surface layers should be considered with precaution.
	dss.ucar.edu /datasets/ds606.5/docs/alis_nutrients.readme.txt (612 words)

	PULSE home
		A new pigment measurement, phaeophytin, was added in March of 2004.
		Phaeophytin was added to the chlorophyll analysis because the pigment is a digestion product of chlorophyll-a and can be found in the fecal pellets of zooplankton that graze on phytoplankton.
		Chlorophyll fluorometric analysis with a larger filter pore in conjunction with the standard filter type will give information regarding the percentage of chlorophyll-a that is coming from larger phytoplankton cells such as diatoms.
	pulse.unh.edu /Data/Chl_Adata.htm (260 words)

	Long Term Ecological Research (LTER) Daily Estuarine Surface Water Nutrient and Water Quality, Suspended Sediment, and ... (Site not responding. Last check: 2007-10-23)
		The water samples were analyzed for chlorophyll a, phaeophytin, nitrogen (total whole and dissolved, ammonia, nitrate-nitrite), phosphorus (total and dissolved and ortho phosphate), organic carbon [total (TOC), dissolved (DOC), particulate (POC)], suspended sediment [Total Suspended Sediment (TSS), Inorganic Suspended Sediment (ISS), Organic Suspended Sediment (OSS)], and suspended sediment color.
		Phaeophytin was analyzed by the addition of 1.0 N Hydrochloric Acid due to the interference at the 430 nanometer wavelength.
		Chlorophyll a and phaeophytin data values from the fluorometer are recorded into a nalgene laboratory notebook, which is kept in the BMFL's water chemistry laboratory fireproof cabinet.
	mercury.ornl.gov /metadata/nbii/html/baruch/LTERDWS.html (11063 words)

	[No title] (Site not responding. Last check: 2007-10-23)
		The phaeophytin a concentrations ranged between 0.02 to 0.66, 0.04 to 0.29 and 3 to 34 mg m-3 respectively; vertically, its distribution, concerning the maximum values, was similar to that of chlorophill a.
		The surface primary production ranged between 10 to 39, 17 to 25 and 140 to 1,530 mg C m-3 day-1 respectively; vertically, the maxima occurred in all sectors at 0 m.
		The very high chlorophill a content and primary production in the predanubian sector, unlike the other two sectors, are due to the extreme eutrophication due to the extreme eutrophi- cation due to the nutrient supply from the Danube and, implicity, to the frequent occurrence of intense phyto- plankton blooms.
	www.rmri.ro /RMRI/Review/4-85.html (149 words)

	OMSAP briefing
		comm.) to numerically recalibrate the dataset on the phaeophytin of the acidified standard.
		In Vitro Determination of Chlorophyll a and Phaeophytin a in Marine and Freshwater Phytoplankton by Fluorescence.
		Two drops of 1 N HCl will be added to the extract and the extract remeasured to determine phaeophytin concentrations.
	www.mwra.state.ma.us /harbor/html/20010731exa2.htm (986 words)

	Arctic LTER database (Site not responding. Last check: 2007-10-23)
		Acidification of the sample produces phaeophytin b which fluoresces at the same wavelength as phaeophytin a.
		This will cause the overestimation of phaeophytin a concentrations and an underestimation's of active chlorophyll a.
		Although phaeophytin a concentrations were estimated using the new fluorometer these data were unreliable and were not used in any calculations of chlorophyll.
	ecosystems.mbl.edu /ARC/data_doc/streams/primprod/94bometa.html (999 words)

	Chlorophyll a
		The methods used for chlorophyll a determination are usually corrected for phaeophytin, the pigment fraction which is not active in photosynthesis.
		It could be argued, however, that the uncorrected (for phaeophytin) chlorophyll data used by Sakamoto (1966) might be better for chlorophyll total phosphorus correlations, since phaeophytin also contains phosphorus.
		Conditions leading to the formation of dications of phaeophytin should be avoided.
	lakes.chebucto.org /DATA/PARAMETERS/CHA/cha.html (1389 words)

	MODIS Chlorophyll Data Quality Summary (Site not responding. Last check: 2007-10-23)
		The first such measurements were made by the Coastal Zone Color Scanner (CZCS) operating between 1978 and 1986, and were termed “pigment concentration.” The CZCS pigment concentration was believed to be more closely related to the sum of chlorophyll a plus phaeophytin a, a degradation product of chlorophyll a, than to chlorophyll a alone.
		It was believed that phaeophytin a could not be distinguished from chlorophyll a given the spectral resolution of the CZCS.
		The CZCS_pigment (MOD19, parameter 13) provides an estimate of chlorophyll a plus phaeophytin a based on fluorometrically derived measurements, and is intended as a heritage product for comparison with the CZCS pigment.
	modis-ocean.gsfc.nasa.gov /qa/terra/dataqualsum/chlor_intro.V4.html (589 words)

	CRWA
		On a quarterly basis, March, June, September, and December, CRWA takes a closer look at the water quality of the Charles River.
		coli, additional testing is conducted for enterococci, nitrate plus nitrite, ammonia, total kjeldahl nitrogen, total nitrogen, phosphorus, orthophosphate, chlorophyll a, and phaeophytin.
		From 1995 through 1997, river samples were analyzed for biochemical oxygen demand, however, due to consistently low levels, testing for biochemical oxygen demand was discontinued.
	www.crwa.org /water_quality/monthly/interpret.html (281 words)

	[No title]
		velocity, depth, width, discharge) and grab samples of stream water were collected at these same times for laboratory analysis of nutrients and water column chlorophyll and phaeophytin a concentrations.
		Lastly, three to five replicate periphyton samples were collected both at the beginning and end of each deployment period to determine benthic chlorophyll and phaeophytin a levels.
		Plots of dissolved oxygen (DO) concentrations verses time clearly show a high degree of daily and weekly fluctuation in the DO curves.
	www.cpcb.ku.edu /workshops/assets/2002_09/abstracts/paper/Huggins.doc (345 words)

	01 (Site not responding. Last check: 2007-10-23)
		Cystopahaera jacquinotii is a brown alga collected from Palmer Station, Antartica in 2001.
		Our recent studies on C. jaqcuinotii showed phaeophytin as the major constituent as well as a phytosteroid.
		The phytosteroid structure was established with the aid of detailed 2D NMR spectral studies such as COSY, HSQC, and HMBC.
	membership.acs.org /F/Florida/abs98.htm (78 words)

	Limnology and Oceanography Abstracts (Site not responding. Last check: 2007-10-23)
		Model predictions for case-1 waters were compared with measurements over a large range of chlorophyll concentrations (0.1—10 mg m
		Chl, where Chl represents the sum of chlorophyll a and phaeophytin a), but with restricted solar zenith angles.
		We used the measured chlorophyll concentration and a model to predict the shape of the upwelling spectral radiance distribution.
	aslo.org /lo/toc/vol_50/issue_2/0698.html (104 words)

	Long Term Ecological Research (LTER) Daily Estuarine Surface Water Nutrient and Water Quality, Suspended Sediment, and ...
		Chlorophyll a (Chl a) and Phaeophytin An appropriate amount of sample (10 or 20 milliliters) is filtered through a 2.5 centimeter, 0.7 micrometer (nominal pore size) GFF glass fiber filter.
		The filter is then placed into a scintillation vial with 1 milliliter of saturated magnesium carbonate (MgCO3) and frozen.
		When the three daily water chemistry, sediment, chlorophyll a data files were merged together into one large database, it was discovered that chlorophyll and phaeophytin values appeared in the database when no water sample was taken that day.
	links.baruch.sc.edu /data/LTERDWS/metadata/LTERDWSmetadata.html (11252 words)

	Chlorophyll-a (Site not responding. Last check: 2007-10-23)
		Chlorophyll-a is the most important photosynthetic pigment found in plants and marine phytoplankton, and is as such an indicator of total biomass.
		The Chl-a data product offered by SISCAL is representative of the concentration of Chl-a and phaeophytin within the first meters from the sea surface.
		Maps of the Chl-a concentration close to the sea surface are used for many applications, such as:
	www.siscal.net /chl.htm (78 words)

	Daily Water Sample Chlorophyll-a and Phaeophytin-a Data for the North Inlet Estuarine System: Former Long-Term ...
		Daily Water Sample Chlorophyll-a and Phaeophytin-a Data for the North Inlet Estuarine System: Former Long-Term Ecological Research (LTER)/NIN004
		LTER - Long-Term Ecological Research Program/North Inlet Salt Marsh, South Carolina (NIN) LTER/NIN004 [Summary adapted from the LTER Core Dataset Catalog] In order to calculate phytoplankton biomass, chlorophyll-a and phaeophytin-a concentrations in the salt marsh tidal creeks were measured daily.
		You may also view the full record in FGDC format
	gcmd.gsfc.nasa.gov /records/GCMD_LTER_NIN004.html (269 words)

	American Society of Limnology and Oceanography
		We studied the relationship between increased availability of organic substrate produced by the bloom and bacterial production.
		Bacterial production (3H-leucine incorporation), total organic carbon (TOC, high temperature catalytic oxidation) and chlorophyll a and phaeophytin (fluorometer) were measured on samples taken at one station (41 34.24'N; 71 24.34'W) on a weekly basis from 13 December 1999 through 13 June 2000 (n=25).
		Over the sampling period, temperatures ranged from 1.5 to 19 C. While temperature alone explained 52% of the variability in bacterial production, the combination of temperature and TOC explained 67% (p
	aslo.org /albuquerque2001/810.html (206 words)

	W.O.O.D. Data Processing Programs (Site not responding. Last check: 2007-10-23)
		Loaded SISMER "CTD" profiles of CHL_a, relative turbidity and relative fluorescence, dissolved oxygen, salinity, and temperature data (over 5000 stations); data mostly from Mediterranean Sea, Atlantic Ocean near N. Africa, and Equatorial Pacific
		Loaded over 1,200 NASA SeaBASS "Pigment" data stations containing discrete depth measurements of (primarily) CHL_a, phaeophytin, and total pigments; has world-wide locations that include the Mediterranean Sea, Atlantic, Pacific, and Indian Oceans; there are significant numbers of Equatorial Pacific data
		Loaded SISMER Bottle sampled nutrients(O2, NO2, NO3, SiO4, NH4), CHL_a, CHL_b, CHL_c, phaeophytin, relative turbidity and relative fluorescence, salinity, and temperature data (over 2000 stations); data mostly from Mediterranean Sea and Equatorial Pacific
	wood.jhuapl.edu /updates.htm (905 words)

	AntiDepressants : Paxil, Lexapro, Fluoxetine, Prozac, Zoloft antidepressant (Site not responding. Last check: 2007-10-23)
		In Reply to: LEVITRA posted by LEVITRA on April 14, 2006 at 06:18:38:
		phaeophytin tarvia antidepressants phaeophytin pachydermatously fungation [url=http://www.echemist.biz] ntidepressants phaeophytin[/url] [link=http://www.echemist.biz] ntidepressants phaeophytin[/link]
		: phaeophytin tarvia antidepressants phaeophytin pachydermatously fungation [url=http://www.echemist.biz] ntidepressants phaeophytin[/url] [link=http://www.echemist.biz] ntidepressants phaeophytin[/link]
	sionna.fatcow.com /wwwboard/messages/11758.html (95 words)

	Marine Chemistry from In-Situ Samples (F069) Data (1974 -1982)
		Chemical and biochemical parameters that may be reported include: dissolved oxygen, nitrate, nitrite, ammonia, inorganic phosphate and silicate; dissolved organic carbon, particulate organic carbon and particulate organic nitrogen; and apparent oxygen utilization, percent oxygen saturation, adenosine triphosphate, total phaeophytin, total chlorophyll, total suspended matter, total recoverable petroleum hydrocarbons and total resolved light hydrocarbons.
		OCEANS > OCEAN CHEMISTRY > PIGMENTS > PHAEOPHYTIN
		CGC > NOAA Climate and Global Change Program
	gcmd.gsfc.nasa.gov /records/GCMD_FW00092.html (306 words)

Try your search on: Qwika (all wikis)