“…The sulfur sources utilized included sodium sulfide ( [ 94 ], thioacetamide ( ) [ 88 , 90 ], and thiourea ( ) [ 11 , 21 , 58 , 69 , 75 , 76 , 77 , 78 , 85 , 89 , 92 , 93 , 95 , 96 , 97 , 98 , 100 , 101 , 102 , 103 , 104 , 105 , 106 , 107 , 108 , 109 , 110 ]. The zinc sources utilized included zinc acetate ( [ 88 , 89 ], zinc acetate dihydrate [ 11 , 75 , 90 , 91 , 92 , 93 , 94 , 95 ], zinc chloride ( ) [ …”