main article header h1{
 visibility:hidden;   
}


ul.social li a[href*="researchgate.net"] .fa:before{
content: "";
background-image: url("https://www.researchgate.net/apple-touch-icon-180x180.png");
height: 36px;
width: 36px;
display: inline-block;
background-size: 100%;
/* background-repeat: no-repeat; */
vertical-align: middle;

border-radius: 100%;
text-align: center;

-webkit-border-radius: 100px;
border-radius: 100px;
}