paulsutton

I am not an expert in fertility, but I have read that there are other factors such as diet, even sitting for long periods or wearing certain types of clothing, heat etc. So antibiotics may be a small factor, if use is combined with other activity. In the US don't they use antibiotics in animals, do those animals also suffer lower fertility, ? Does this put those antibiotics in the food chain.?

Currently reading Research data visualization and scientific graphics, by Martins Zaumanis, which is the 2nd book in the peer recognized series, the first being How to write an impactful research paper. I finished reading this first. Nice series of books.

Update, I managed to get this working nicely using 2x AA batteries powering 2 motors at the front and the same for the other 2 motors at the back, bigger wheels also help. I am now looking to rebuild, motors will be glued on, with hot glue, rather than with sticky pads, gives a chance to do a quick re-design to make the wiring better. Thanks for the help / advice on this, really helpful. Paul

There is definitely a power issue. Using 2x cheap batteries and 2x Duracell makes a huge difference. I have wired up 2 motors, so that a battery pack can power 2 motors, then just need to do the same the other side. Paul

Hi Thanks for these suggestions, I will do as suggested. Paul

I am trying to build a small motor driven vehicle, this is toy size. I have a polycarbonate sheet and 4 motors, and 4 plastic wheels (but also have other wheel, so can interchange them. I have wired this up so far so that 2 of the wheels are wired up to a battery, the other 2 wheels are just attached to motors, my main issue regardless of how I do things, is that a motor plus wheel spins if held up, as soon as I put down on a flat surface, the motor + wheel stops turning. I am not an engineer, so not really sure what to do here. Thanks Paul

Ah OK thanks, I was probably confused by the diagram. So I can have A-T and T-A along with G-C and C-G I will have a look at what I have and make sure the right bits go together and disguard the wrong combinations. Thanks Paul

Thanks for this, Paul

Hi I am guessing this is the right place to ask this. I am building a Model of DNA using coloured craft sticks, which happen to be in 4 colours Red, Green, Yellow and Blue which is ideal for representing A G C T as the base molecules Amine, Thymine, Guanine, Cytosine As I am putting these in pairs, can I have the same molecule connected together? e.g AA GG CC TT Looking at the diagram on the compound chemistry https://www.compoundchem.com/2015/03/24/dna/ I am guessing not, as this does not show pairs that are the same. Just asking anyway. Going Ok so far, I just need some string to tie everything together. And yes I know I can buy one of these as a kit, but it is fun to do this way but also can help others do the same, as it is a cheap way of making the model Thanks Paul

Hi . Thanks for this This is for a home chem lab or rather for use at the library stem group. I don't think my budget will stretch that far so will stick to manual stirring, Paul

I am looking at building a device that makes it easier to stir or mix liquids together. Is there any advantages or disadvantages of Manual stirring Magnetic Stirring device that use a paddle to stir liquids (usually a motor of some sort) Or rotating the actual beaker so the liquid within moves around at a consistent speed. I have found by accident that the beaker I have here, sits nicely on a robot wheel, connected to a motor and Arduino, so if I can attach more securely should allow this to be set up while mixing. I will eventually add a potentiometer to this so that the speed can be controlled and maybe a few other components, such as an on / off switch Thanks Paul

If a few people get the reminder they can remind the admin to do it. I am with portfast and I get a reminder 3 months before the renewal / expiry date. Either way, thank you for renewing and keep up the good work, admins and mods are all doing a fantastic job.

Ah ok, no problem,

Cool thanks for this.

Getting things around in space, I would guess the reason the idea of a space shuttle getting to the moon was brought up is because we need to get from earth to the moon or from low orbit to the moon and back. If we wanted to transport cargo, then these transport options could be automated to allow more fuel as the need for oxygen for humans is not needed.