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katherine-medina

Marine Drugs | Free Full-Text | Microalgae Photo-Protectants and Related Bio-Carriers L... - 0 views

www.mdpi.com/487

shared by katherine-medina on 14 Sep 23 - No Cached
Sean Nash liked it
  • This review focuses on the use of these microalgae compounds obtained by UV stimulation and takes advantage of their natural UV-resistant characteristics to potentially apply them as an alternative for UV protection products.
    • katherine-medina
      katherine-medina on 14 Sep 23
       
      Can I put this on a plant in order to mitigate heat damage?
  • pproximately 90–99% of the solar UV radiation energy that reaches the Earth’s surface is UV-A
  • whereas only 1–10% is UV-B [4]. Both UV-A and UV-B are responsible for one of the biggest concerns related to UV radiation, which is skin cancer
  • ...28 more annotations...
  • The mechanisms leading to skin damage are not fully understood and may derive from the generation of ROS and subsequent lipid peroxidation
  • To prevent photodamage, organisms have evolved to provide biochemical and physical defenses to UV by synthesizing robust bioactive compounds
  • Some algae species synthesize substances with chemical structures that can absorb UV radiation as well as inhibit actions on melanin synthesis
    • katherine-medina
      katherine-medina on 14 Sep 23
       
      Which algaes
  • Microalgae can produce organic metabolites, such as sporopollenin, scytonemin, and MAAs to mention a few, and these metabolites have the purpose to protect the microalgae from UV radiation while allowing visible radiation involved in photosynthesis to pass through
  • two marine microalgae Pavlova lutheri, currently known as Diacronema lutheri, and Odontella aurita
    • katherine-medina
      katherine-medina on 14 Sep 23
       
      After I get through the other ones I will get to you my pretty
  • UV-Resistant Microalgae
  • Marine organisms, including eukaryotic microalgae and cyanobacteria, during evolution, have developed physiological and biochemical traits for defense and/or tolerance to UV rays
    • katherine-medina
      katherine-medina on 14 Sep 23
       
      Come back to this part
  • This research also mentioned the Antarctic microalgae Chaetoceros dichaeta, Phaeocystis antarctica, and Polarella glacialis, these were subjected to acclimation to photosynthetically active radiation (PAR) and showed resistance to UV-B rays.
  • It was found that the tolerant species contained substantial amounts of acetolysis-resistant residue
  • So far, several species, e.g., Coelastrella rubescens, Coelastrella terestris, Enallax coelastroides, Scotiella chlorelloidea, Ankistrodesmus spiralis, Chlorella minutissima, Chlorella sorokiniana, and Pseudococcomyxa sp. have been reported as rich sources of MAAs
  • They are abundant in various aquatic and terrestrial environments and are known for being eco-sustainable compounds since they are the outcome of the evolution of algae. Unlike their synthetic counterparts used unconventional sunscreens, there are no possibilities for pollution caused by them [22]. Thus, algal metabolites shape the safety and sustainability profiles of commercial sunscreens [22].
    • katherine-medina
      katherine-medina on 14 Sep 23
       
      How long can the algae last on the skin or leaf of a plant
  • The results obtained point out different resistance and defense mechanisms of the four microalgae in response to UV-B irradiance and suggest that the strain of Nostoc sp. tested is the most suitable for surviving under the high UV irradiation [33]
  • Certain microalgae produce organic metabolites, such as sporopollenin, scytonemin, and MAAs as well as other UV-absorbing substances to counteract the harmful effects of UV radiation and protect themselves while allowing visible radiation involved in photosynthesis to pass through
  • The best known photoprotective response in marine organisms is the production or accumulation of UV-absorbing compounds, including MAAs as the most common compounds with such properties, but there are also others, such as scytonemin, carotenoids, alganean, and various secondary metabolites
    • katherine-medina
      katherine-medina on 14 Sep 23
       
      photoprootective means protecting the skin
  • f low molecular weight, commonly found in marine environments. These compounds have absorption maxima in the UV region between 310 and 360 nm, they can dissipate radiation as heat without producing ROS. Under fixed light, MAA biosynthesis seems the most effective photoprotective mechanism
  • For these reasons, they potentially can prevent UV-induced skin damage
  • It was reported that species of microalgae that were highly tolerant to UV radiation had substantial amounts of sporopollenin. This compound functions as an antimicrobial agent, confers rigidness to the cell wall, and may further protect from UV rays by increasing the optical density, whereas species containing little or no sporopollenin were highly UV radiation susceptible
  • However, the potential of microalgae as topical photoprotectants has not been fully exploited, since there are not a lot of studies regarding this application.
  • Other reports determine that scytonemin is suspected to be synthesized from metabolites of aromatic amino acid biosynthesis
    • katherine-medina
      katherine-medina on 14 Sep 23
       
      No set decision on how it is created
  • Alginate is a
  • ydration
  • However, some microalgae have a great ability to overcome or counteract different stresses such as intense solar UV radiation, this has been happening over the years and with the evolution of microalgae, some examples of defense and/or tolerance mechanisms are: DNA repair, synthesis of antioxidants, and enzymatic/non-enzymatic compounds, such as MAAs and scytonemin to counteract the harmful effects of UV radiation
  • Scytonemin is a yellow-brown lipid soluble sheath pigment that absorbs maximally in the UV-A and UV-C regions, but with some absorbance in the UV-B region. It has an in vivo absorption maximum of 370 nm.
  • tigate UV damage induced.
  • photosensitizers, their antioxidant
  • V
  • ed.
  • t
  • katherine-medina on 14 Sep 23
     
    A recent article showing the potential use of microalgae as a sunscreen.
  • Sean Nash on 14 Sep 23
     
    Yes..... let's chat this one out!
prishabpatel

Melatonin and its relationship to plant hormones | Annals of Botany | Oxford Academic - 2 views

academic.oup.com/...4560814

HSR-2023 botany biology

shared by prishabpatel on 24 Aug 23 - No Cached
Sean Nash liked it
  • Sean Nash on 24 Aug 23
     
    This is super interesting to me... both the content itself AND the fact that this is not far from feasible for an advanced HS study. Phytohormones: FASCINATING, accessible, relatively easy to apply, and the immediate question is... is it measurable? We can certainly measure the effects of applied plant hormones simply by recording the growth and development data of the plants we apply them to. What this article gets at (from a VERY brief SKIM) is the need to measure increases of hormones levels INSIDE plant tissue. Now, this is something that requires sophistication beyond what we have a BLHS. However, it might be able to be detected by NMR (nuclear magnetic resonance), HPLC (high-pressure liquid chromatography), or IR spectroscopy. If we know exactly what we're looking for in plant specimens/samples, and we ask super professionally, perhaps we could get the chem department at UMKC to help us use the right tool for the job to detect and measure these things.
prishabpatel

Lectins as Bioactive Plant Proteins: A Potential in Cancer Treatment - 1 views

www.tandfonline.com/...10408390591034445

HSR-2023 botany biology

shared by prishabpatel on 24 Aug 23 - No Cached
Sean Nash liked it
  • Sean Nash on 24 Aug 23
     
    Nifty. OK, here's my initial reaction: do we know what the proposed mechanism of action is for lectins regarding cancers? HOW do we think they are having this measurable effect? If we know that... is there a simple animal model where we could measure the same/similar effect right here in the lab?
katherine-medina

Sci-Hub | A droplet-based electricity generator with high instantaneous power density. ... - 0 views

sci-hub.se/...s41586-020-1985-6

water-power droplets electricity HSR-2023

shared by katherine-medina on 22 Aug 23 - No Cached
    • katherine-medina
      katherine-medina on 22 Aug 23
       
      We find that when a falling water droplet spreads on the PTFE surface, it bridges the originally disconnected components (the PTFE/ITO and aluminum electrode) into a closed-loop, electrical system Interesting.
    • katherine-medina
      katherine-medina on 22 Aug 23
       
      Fig. 1 | Design of the DEG. a, Schematic diagram. b, Optical image showing four parallel DEG devices fabricated on a glass substrate. The volume of each droplet is 100.0 μl. c, As individual droplets continue to impinge on the asfabricated device, the amount of charge on the PTFE surface increases gradually and eventually reaches a stable value. d, One hundred commercial LEDs can be powered when one droplet, released from a height of 15.0 cm, is in contact with the device. e, Under the same experimental conditions (for example, the same droplet size and height of release), the output voltage measured from the DEG (in red, with the frequency of impinging droplets being
  • katherine-medina on 22 Aug 23
     
    Interesting to see a different method on creating power out of water. I kinda of want to look into the science of water.
katherine-medina

(34) Water, Cells, and Life | Dr. Gerald Pollack | TEDxNewYorkSalon - YouTube - 0 views

www.youtube.com/watch

water electricity Research-idea HSR-2023

shared by katherine-medina on 18 Aug 23 - No Cached
  • katherine-medina on 18 Aug 23
     
    Looking at the basics of how water works
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