01-08-2006, 01:32 AM
| #31 | ||
| Grand Master Gardener   Join Date: Jun 2004 Location: In Transigent
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02-17-2006, 02:23 PM
| #32 | ||
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Here's a really comprehensive review of currently avaialable and emerging artificial lighting technologies, published in September 2005 by the US Department of Energy. As usual it's focused on human eye applications but nevertheless is a worthwile read and a good reference for people who are interested in lighting concepts. Warning: it's a 286-page PDF, hosted on a .gov. Energy Efficient Lighting Options | ||
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02-19-2006, 08:56 PM
| #33 | ||
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__________________ Last edited by buzzmobile : 07-23-2007 at 04:47 AM. Reason: Update | ||
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02-25-2006, 01:40 AM
| #34 | ||
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One of these days I will get a Light 101 post up here somewhere, until there, here are some links dealing Radiometry and Photometry. http://physics.nist.gov/cuu/Units/units.html US National Institute of Standards and Technology (NIST) pages on the Internation System of Units (SI). The units in which we are interested (at least in this post) are the watt, candela, lumen, lux, and watt/meter^2 A National Measurement System for Radiometry, Photometry, and Pyrometry Based upon Absolute Detectors (nist.gov site) Radiometry and photometry FAQ http://en.wikipedia.org/wiki/Photometry_%28optics%29 http://en.wikipedia.org/wiki/Candela http://en.wikipedia.org/wiki/Lumen_%28unit%29 http://en.wikipedia.org/wiki/Luminosity_function http://en.wikipedia.org/wiki/Chlorophyll (compare absorption spectra with luminosity function, above) http://en.wikipedia.org/wiki/Foot-candle (caveat: horticulturists do not discuss artificial light for plants in terms of foot-candles). http://en.wikipedia.org/wiki/Inverse_square_law http://en.wikipedia.org/wiki/Lambert%27s_cosine_law Hyperphysics Light and Vision entry point: http://hyperphysics.phy-astr.gsu.edu...ligcon.html#c1 Black Body Radiation Applet http://en.wikipedia.org/wiki/Blackbody http://en.wikipedia.org/wiki/Color_t...or_temperature All gas discharge lamps, including both fluorescent and HID, emit line spectra as illustrated http://en.wikipedia.org/wiki/Fluores..._emitted_light How are Spectra Produced? Fluorescents and the Kelvin Myth: Changing the Calibration for Color Edit: Almost forgot PAR (radiance measured in watts, irradiance measured in watts per square meter) and Photosynthetic Photon Flux Density (measured in microEinsteins) http://en.wikipedia.org/wiki/Photosy...tive_radiation http://en.wikipedia.org/wiki/MicroEinstein Watts, Lumens, Photons and Lux
__________________ Last edited by penguin : 02-25-2006 at 02:51 AM. | ||
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07-21-2007, 04:52 PM
| #35 | ||
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The biological improbability of a clone (click on PDF for free full text) Evolution of mitotic cell-lineages in multicellular organisms On the potential for evolutionary change in meristematic cell lineages through intraorganismal selection Spectrum of genetic diversity and networks of clonal organisms Assessing Genetic Diversity in Clonal Organisms: Low Diversity or Low Resolution? Combining Power and Cost Efficiency in Selecting Markers Literally hundreds of papers have been published describing genetic diversity within clonal populations of individual species.  penguin
__________________ Last edited by penguin : 07-21-2007 at 08:01 PM. Reason: urls | ||
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07-25-2007, 07:03 PM
| #36 | ||
| Watching friends Garden  Join Date: Aug 2004 Location: Blue Mountains of Jamaica
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Holy CHIT !!! This is way way keeper.....:click...saving to favorites I've spent the last 3 days reading thru the many many articles, pages and references here. Jah Bless Profound 
__________________  Foxfarm Ocean Forest Soil, Foxfarm Happy Frog, Coco Coir, Worm Castings, Blood Meal, Bone Meal, Greensand plus, Neptunes Harvest Fish Fertilizer, Crab Shell, 100% pure Ascophyllum Nodosum Sea Kelp, Dolomite Lime, perlite, vermiculite, Mexican Bat Guano and Jamaican Bat Guano teas, Ξarth Juice's Grow, Bloom, Meta K, Microblast with Bio-Genesis Synergy and a touch of Molasses | ||
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10-06-2007, 11:55 AM
| #37 | ||
| Grand Master Gardener Join Date: Jun 2004 Location: In Transigent
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Day and Night Temperature Responses in Arabidopsis: Effects on Gibberellin and Auxin Content, Cell Size, Morphology and Flowering Time Effect of Day and Night Temperature on Internode and Stem Length in Chrysanthemum: Is Everything Explained by DIF? Effect of diurnal temperature alternations on plant morphology in some greenhouse crops—a mini review | ||
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11-16-2007, 12:58 AM
| #38 | ||
| Grand Master Gardener Join Date: Jun 2004 Location: In Transigent
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Here are a couple of free full text review articles discussing epigenetic phenomena in plants: Epigenetics and its Implications for Plant Biology. 1. The Epigenetic Network in Plants Epigenetics and its Implications for Plant Biology 2. The ‘Epigenetic Epiphany’: Epigenetics, Evolution and Beyond penguin | ||
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02-02-2008, 11:17 PM
| #39 | ||
| Grand Master Gardener Join Date: Jun 2004 Location: In Transigent
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| Rhizosphere ecology: Root Effects on Soil Organic Matter Decomposition The release of root exudates as affected by the plant physiological status Regulation of arbuscule formation by carbon in the plant Saccharide transport across root cell membranes: Characterization of Hexose Transport System in Maize Root Tips Sugar Transport in Isolated Corn Root Protoplasts Re-sorption of organic components by roots of Zea mays L. and its consequences in the rhizosphere (abstract) Saccharide and amino acid transport within the plant: Phloem loading and unloading of sugars and amino acids The control of carbon acquisition by roots
__________________ Last edited by penguin : 02-08-2008 at 12:42 AM. Reason: added mini-review of arbuscule formation; added mini-reivew of carbon aquisition by roots | ||
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09-10-2008, 01:27 PM
| #40 | ||
| Master Gardener  Join Date: Feb 2006
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| Very good articles about soil's chemistry, and a complete review of the different nutrients roles, defficiencies and toxicities: Basic Agronomy Spectrum Agronomic Library BTW, its a company wich analize soils and plants tissues, in case somebody is looking for it.
__________________ "It is dangerous to be right when Government is wrong" (Voltaire) Bulb Analyzer Tool | ||
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