Dear Franz Plochberger, the gravitation is a property of the Planetary field, by the drag due to the action of the Planetary quark. It has nothing to do with the stability of atomic nuclei. See: “TCS Theory -Planetary Mechanics ” on https://www.researchgate.net/publication/268270692_TCS_Theory_-Planetary_Mechanics-WEB?ev=prf_pub or http://dx.doi.org/10.5539/apr.v3n2p89

Article TCS Theory -Planetary Mechanics-WEB

Dear Daniel,

you make the legacy differentiation between macro cosmos and quantum world.

That's not exact my question.

My question tries to find a fundamental relation between the two fundamental forces Strong Nuclear Force in Nuclei and the Gravitation (always between masses). 

I am interested  in any theoretical relation based on fundamental terms mass and matter.

Of course you are right - they are defined as different physical forces - but in my structural thinking I find mass and matter.

Mass and matter are terms in nuclei too. Where is mass? Is a proton or neutron no matter? 

There is a fundamental difference by physical dimension of magnitude - but where is the relation? 

You might want to look at the following papers I have put on this site.

Hadrons as Kerr-Newman Black Holes

Discrete Scale Relativity

Also there are other papers here on the subatomic particle mass spectrum that support your idea of strong gravitation in the microcosm.

 Dear Franz Plochberger, the atomic equilibrium is given exclusively by electromagnetic laws and dynamic laws. There is no relationship between gravitation and the "strong interaction or Strong Nuclear Force in Nuclei" currently named within the "Standard Model". I disagree with the "Standard Model" or the "Relativistic theory".  See: “Teoría QEDa - El átomo y su núcleo” on https://www.researchgate.net/publication/268503521_Teoria_QEDa_-_El_atomo_y_su_nucleo?ev=prf_pub

Book Teoría QEDa - El átomo y su núcleo.