• 0 Posts
  • 19 Comments
Joined 2 years ago
cake
Cake day: June 11th, 2023

help-circle
  • After sparing this paper a fair bit of attention I feel I’ve wasted it.

    Nowhere in the paper could i find in what conditions the test samples were kept during the experiment. This is pretty basic stuff. At this stage I’d wage sloshing was the issue.

    Reading this part of the methodology:

    "2.2 Initial sperm analysis

    After liquefaction…

    [Two paragraphs later, in the same section: ] After this first analysis, the 15 sperm samples were split into two fractions. All the samples were exposed to ‘Parabolic flight’ (split 1) and to…"

    Did they liquefied the samples and tested like that? Whaa?

    The “After this first analysis” should not be in the “2.2 Initial sperm analysis”. It just shouldn’t!

    Then I think “15 sperm samples were split into two fractions”. … “the samples were exposed to ‘Parabolic flight’ (split 1)” — splits, fractions, what a mess!! At this stage I’ve wasted enough.

    The paper should be retracted, the reviewers spanked and the editor fired.




  • Abstract

    Most of the widely used vaginal lubricants in the U.S. and Europe are strongly hyperosmolal, formulated with high concentrations of glycerol, propylene glycol, polyquaternary compounds or other ingredients that make these lubricants 4 to 30 times the osmolality of healthy vaginal fluid. Hyperosmolal formulations have been shown to cause marked toxicity to human colorectal epithelia in vivo, and significantly increase vaginal transmission of genital herpes infections in the mouse/HSV model. They also cause toxicity to explants of vaginal epithelia, to cultured vaginal epithelial cells, and increase susceptibility to HIV in target cells in cell cultures. Here, we report that the osmolality of healthy vaginal fluid is 370 ± 40 mOsm/Kg in women with Nugent scores 0–3, and that a well-characterized three-dimensional human vaginal epithelium tissue model demonstrated that vaginal lubricants with osmolality greater than 4 times that of vaginal fluid (>1500 mOsm/Kg) markedly reduce epithelial barrier properties and showed damage in tissue structure. Four out of four such lubricants caused disruption in the parabasal and basal layers of cells as observed by histological analysis and reduced barrier integrity as measured by trans-epithelial electrical resistance (TEER). No epithelial damage to these layers was observed for hypo- and iso-osmolal lubricants with osmolality of <400 mOsm/Kg. The results confirm extensive reports of safety concerns of hyperosmolal lubricants and suggest the usefulness of reconstructed in vitro vaginal tissue models for assessing safety of lubricants in the absence of direct clinical tests in humans.



  • Yes!

    My Xiaomi Redmi 11 keeps telling me the Calculator can’t use the network (why?) and keeps asking me to accept the privacy policy.

    Also the app wallpaper - the one that changes the locked screen background image (important complex stuff /s) - also keeps asking me to accept the privacy policy.

    And, as far as my reading of the policy goes, these privacy policies are just the one, it’s not a different one for each app.


  • What do you even mean with your word salad?

    Your first sentence/paragraph is absurd in the post’s context. Crop rotation will not replenish the soils’ potassium.

    And in your 2nd paragraph… what do you mean by “similar purpose”? It’s ambiguous, how you have used it. Also, do you know anything of how fertilizers work?

    Quick quiz: Wheat has b12 vitamin and iodine, can you just eat more bread to replenish your body’s neads for those nutrients? Or does a balanced diet need to be …balanced for all nutrients?






  • What you said on the 1st sentence is okay. After that, is clueless. …in the context of discussing the difficulties - technical and economical - of growing specific algae for food.

    After sterilising everything and sigeling out the alge you want you should in theory be able to run more or less indefinitely.

    This is like saying that if there’s sun and no clouds, in theory, the sky should be blue. In practice there’s no useful information added to the discussion on the…

    And if a contamination of found it just a matter of sterilizing everything with steam and reboot the system.

    Like in all that is microbiology, kind of. Except steam is not sterilising. Unless under autoclave pressures. Inside an autoclave. Even in those conditions, which are agreed to be sterilising, even then not all microbes are killed and contamination is still considered as an issue in some cases. Again, in practice there’s no useful information added to the discussion on the…

    Your non-expert overconfidence is not unique. It’s an epidemic. And that’s why I’m triggered to comment on it.




  • PeerTube looks quite promising with its decentralised model. Surely it will never be perfect. But decentralisation is essencial. Also because the types of videos I like to see in YouTube either are monetised by themselfs in some way. Or are not monetised at all. YouTube does not seem necessary for those creators.