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Thread: S.S.S.S.

  1. #11
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    Looks like the light is white/blue?

  2. #12
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    Quote Originally Posted by Floyd R Turbo View Post
    Looks like the light is white/blue?
    Oh yeah. That's just a reflection off my display halides, the actual algae light is a single standard 23w 2700k cfl. Got foil around it most of the time so I can run it at night now. Still not an 18hour period yet, maybe next week, there's no rush, after all

  3. #13
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    Day 8;

  4. #14

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    Is that growing off the cable ties

  5. #15
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    It's growing from the plastic canvas at the minute, but I see no reason why, after time, it should not use the ties as a substrate. Hence the "All Dimensional" reference. That's the plan anyway. As you can just make out from the pic, they've started to change colour.

  6. #16

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    Looking good,i cant see any reason why it wont start growing off them cable ties



  7. #17
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    This link really encompasses a lot of my thoughts;
    http://www.pnas.org/content/107/6/2527.full

    Abstract

    Worldwide, many marine coastal habitats are facing rapid deterioration due in part to human-driven changes in habitat characteristics, including changes in flow patterns, a factor known to greatly affect primary production in corals, algae, and seagrasses. The effect of flow traditionally is attributed to enhanced influx of nutrients and dissolved inorganic carbon (DIC) across the benthic boundary layer from the water to the organism however, here we report that the organism’s photosynthetic response to changes in the flow is nearly instantaneous, and that neither nutrients nor DIC limits this rapid response. Using microelectrodes, dual-pulse amplitude-modulated fluorometry, particle image velocimetry, and real time mass-spectrometry with the common scleractinian coral Favia veroni, the alga Gracilaria cornea, and the seagrass Halophila stipulacea, we show that this augmented photosynthesis is due to flow-driven enhancement of oxygen efflux from the organism to the water, which increases the affinity of the RuBisCO to CO2. No augmentation of photosynthesis was found in the absence of flow or when flow occurred, but the ambient concentration of oxygen was artificially elevated. We suggest that water motion should be considered a fundamental factor, equivalent to light and nutrients, in determining photosynthesis rates in marine benthic autotrophs.
    There are two possible pathways by which oxygen accumulation inhibits photosynthesis (2,4): (i) photorespiration, involving enhanced oxygenase activity of ribulose-1,5-bisphosphate carboxylase/oxygenase (RuBisCO) (20), and (ii) the production and accumulation of reactive oxygen species (ROS) (4) through such processes as the Mehler reaction (21, 22). The latter pathway is most pronounced under conditions of extreme temperatures or excessive light (4). Photorespiration is expected to occur when the internal concentration of oxygen is sufficiently high to effectively compete with CO2 as the substrates of RuBisCO (23), a key enzyme in photosynthetic carbon assimilation.
    In all three species studied, the onset of flow led to significantly (several-fold) enhanced photosynthesis and a substantial (32%–45%) reduction of oxygen concentration inside the organisms (Fig. 1). Differences between flow and no-flow conditions were highly significant
    http://www.pnas.org/content/107/6/2527/F1.large.jpg

    We conclude that photorespiration, driven by the use of oxygen instead of CO2 as the substrate for RuBisCO, was the principal cause of the decline in photosynthesis under no-flow conditions. Whereas the species examined had different types of RuBisCO with differing affinities to CO2 and O2 (23), in all three species low internal oxygen enhanced photosynthesis (Fig. 1D).

  8. #18
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    Day 9 and the GHA seems to be taking a hold on the cable ties;


  9. #19

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    Did you Rough-up the cable ties on both sides

  10. #20
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    Quote Originally Posted by donkey View Post
    Did you Rough-up the cable ties on both sides
    No, just the flat side. Left the clicky side as it was.

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