Warning: file_get_contents(https://ojs.journalbusiness.my/ojs.php): failed to open stream: HTTP request failed! HTTP/1.1 404 Not Found in /var/www/ojs.unud.ac.id_backup/lib/pkp/includes/functions.inc.php on line 4 Komaladewi, A.A.I.A.S, Aryanti, PTP, Ary Subagia, I D G, Surata, I W, AND Wenten, I G. " Surface Modification of Microfiltration Polypropylene Membrane for Molecular Air Filtration" International Journal of Engineering and Emerging Technology [Online], Volume 4 Number 1 (8 October 2019)