Skip to content
  • Home Home Home, current page.
  • Moments Moments Moments, current page.

Saved searches

  • Remove
  • In this conversation
    Verified accountProtected Tweets @
Suggested users
  • Verified accountProtected Tweets @
  • Verified accountProtected Tweets @
  • Language: English
    • Bahasa Indonesia
    • Bahasa Melayu
    • Català
    • Čeština
    • Dansk
    • Deutsch
    • English UK
    • Español
    • Filipino
    • Français
    • Hrvatski
    • Italiano
    • Magyar
    • Nederlands
    • Norsk
    • Polski
    • Português
    • Română
    • Slovenčina
    • Suomi
    • Svenska
    • Tiếng Việt
    • Türkçe
    • Ελληνικά
    • Български език
    • Русский
    • Српски
    • Українська мова
    • עִבְרִית
    • العربية
    • فارسی
    • मराठी
    • हिन्दी
    • বাংলা
    • ગુજરાતી
    • தமிழ்
    • ಕನ್ನಡ
    • ภาษาไทย
    • 한국어
    • 日本語
    • 简体中文
    • 繁體中文
  • Have an account? Log in
    Have an account?
    · Forgot password?

    New to Twitter?
    Sign up
jamesd23x's profile
jamesd23x
jamesd23x
jamesd23x
@jamesd23x

Tweets

jamesd23x

@jamesd23x

Joined May 2008

Tweets

  • © 2018 Twitter
  • About
  • Help Center
  • Terms
  • Privacy policy
  • Cookies
  • Ads info
Dismiss
Previous
Next

Go to a person's profile

Saved searches

  • Remove
  • In this conversation
    Verified accountProtected Tweets @
Suggested users
  • Verified accountProtected Tweets @
  • Verified accountProtected Tweets @

Promote this Tweet

Block

  • Tweet with a location

    You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more

    Your lists

    Create a new list


    Under 100 characters, optional

    Privacy

    Copy link to Tweet

    Embed this Tweet

    Embed this Video

    Add this Tweet to your website by copying the code below. Learn more

    Add this video to your website by copying the code below. Learn more

    Hmm, there was a problem reaching the server.

    By embedding Twitter content in your website or app, you are agreeing to the Twitter Developer Agreement and Developer Policy.

    Preview

    Why you're seeing this ad

    Log in to Twitter

    · Forgot password?
    Don't have an account? Sign up »

    Sign up for Twitter

    Not on Twitter? Sign up, tune into the things you care about, and get updates as they happen.

    Sign up
    Have an account? Log in »

    Two-way (sending and receiving) short codes:

    Country Code For customers of
    United States 40404 (any)
    Canada 21212 (any)
    United Kingdom 86444 Vodafone, Orange, 3, O2
    Brazil 40404 Nextel, TIM
    Haiti 40404 Digicel, Voila
    Ireland 51210 Vodafone, O2
    India 53000 Bharti Airtel, Videocon, Reliance
    Indonesia 89887 AXIS, 3, Telkomsel, Indosat, XL Axiata
    Italy 4880804 Wind
    3424486444 Vodafone
    » See SMS short codes for other countries

    Confirmation

     

    Welcome home!

    This timeline is where you’ll spend most of your time, getting instant updates about what matters to you.

    Tweets not working for you?

    Hover over the profile pic and click the Following button to unfollow any account.

    Say a lot with a little

    When you see a Tweet you love, tap the heart — it lets the person who wrote it know you shared the love.

    Spread the word

    The fastest way to share someone else’s Tweet with your followers is with a Retweet. Tap the icon to send it instantly.

    Join the conversation

    Add your thoughts about any Tweet with a Reply. Find a topic you’re passionate about, and jump right in.

    Learn the latest

    Get instant insight into what people are talking about now.

    Get more of what you love

    Follow more accounts to get instant updates about topics you care about.

    Find what's happening

    See the latest conversations about any topic instantly.

    Never miss a Moment

    Catch up instantly on the best stories happening as they unfold.

    1. whitequark‏ @whitequark Apr 1

      "Well, I think I'll do a better job than two billions of years of evolution in a few decades. That's because I'm a dude who coded a thing or two on a computer. I am very smart."pic.twitter.com/704L12etsf

      24 replies 82 retweets 388 likes
      Show this thread
    2. whitequark‏ @whitequark Apr 1

      I hereby propose an unit of hubris, "Altman". For most practical applications, nanoaltmans will be more than sufficient

      4 replies 21 retweets 129 likes
      Show this thread
    3. whitequark‏ @whitequark Apr 1

      for those who don't know, it's not like plants didn't solve this problem. the warmer it gets, the worse C₃ plants get at carbon fixation, and the more of a competitive advantage C₄ plants get; today, C₄ plants account for ~1/20th of biomass but ~1/5 of carbon fixation

      2 replies 4 retweets 49 likes
      Show this thread
    4. whitequark‏ @whitequark Apr 1

      C₄ fixation is extremely advantageous in warmer or drier conditions; so much so that it has independently evolved a staggering 45 (forty five) times. The problem though is that it takes more energy, so if you look back, C₄ plants expand during _falling_ CO₂ levels, not rising

      1 reply 5 retweets 44 likes
      Show this thread
    5. whitequark‏ @whitequark Apr 1

      Why all this fiddling with C₃/C₄? Why not just make a better RuBisCO? Well, there probably *isn't* a better RuBisCO. It's possible to alter it to decrease the rate of photorespiration (the major limiting factor), but then it becomes slower.pic.twitter.com/nIu3fGttSz

      4 replies 3 retweets 26 likes
      Show this thread
    6. whitequark‏ @whitequark Apr 1

      So what happens? If you can't change RuBisCO, change the environment around RuBisCO! That's exactly what C₄ plants do as an adaptation to low CO₂ levels in relation to O₂ levels:pic.twitter.com/OBctG9cdiZ

      3 replies 1 retweet 23 likes
      Show this thread
      jamesd23x‏ @jamesd23x Apr 2
      Replying to @whitequark

      CO2 levels are near the lower limit beyond with plants cannot adapt. Should CO2 fall significantly, everything dies, if it rises a bit, Hawaii comes to San Francisco

      10:13 PM - 2 Apr 2018
      0 replies 0 retweets 0 likes

      Loading seems to be taking a while.

      Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.

        Promoted Tweet

        false

        • © 2018 Twitter
        • About
        • Help Center
        • Terms
        • Privacy policy
        • Cookies
        • Ads info