Added some more feedbacks on the blood_DNA stuff

Fixed up some chemistry stuff
Nitrogen now adds atmospheric nitrogen when splashed on the ground.

code/modules/assembly/infrared.dm

@@ -45,6 +45,13 @@
 		if(scanning)
 			src.overlays += text("infrared_old2")
 			src.small_icon_state_overlays += text("infrared_on")
+			if(master && istype(master, /obj/item/weapon/chem_grenade))
+				var/obj/item/weapon/chem_grenade/M = master
+				M.c_state(1)
+		else
+			if(master && istype(master, /obj/item/weapon/chem_grenade))
+				var/obj/item/weapon/chem_grenade/M = master
+				M.c_state(0)
 		if(holder)
 			holder.update_icon()
 		return
@@ -129,6 +136,7 @@
 		if (href_list["state"])
 			src.scanning = !(src.scanning)
 			update_icon()
+			processing_objects.Add(src)
 
 		if (href_list["visible"])
 			src.visible = !(src.visible)

code/modules/assembly/proximity.dm

@@ -90,6 +90,13 @@
 		if(scanning)
 			overlays += text("prox_scanning")
 			small_icon_state_overlays += text("prox_scanning")
+			if(master && istype(master, /obj/item/weapon/chem_grenade))
+				var/obj/item/weapon/chem_grenade/M = master
+				M.c_state(1)
+		else
+			if(master && istype(master, /obj/item/weapon/chem_grenade))
+				var/obj/item/weapon/chem_grenade/M = master
+				M.c_state(0)
 		if(holder)
 			holder.update_icon()
 
@@ -126,10 +133,12 @@
 
 		if(href_list["scanning"])
 			toggle_scan()
+			processing_objects.Add(src)
 
 		if(href_list["time"])
 			timing = text2num(href_list["time"])
 			update_icon()
+			processing_objects.Add(src)
 
 		if(href_list["tp"])
 			var/tp = text2num(href_list["tp"])

code/modules/assembly/timer.dm

@@ -64,6 +64,13 @@
 		if(timing)
 			overlays += text("timer_timing")
 			small_icon_state_overlays += text("timer_timing")
+			if(master && istype(master, /obj/item/weapon/chem_grenade))
+				var/obj/item/weapon/chem_grenade/M = master
+				M.c_state(1)
+		else
+			if(master && istype(master, /obj/item/weapon/chem_grenade))
+				var/obj/item/weapon/chem_grenade/M = master
+				M.c_state(0)
 		if(holder)
 			holder.update_icon()
 		return
@@ -92,6 +99,7 @@
 
 		if(href_list["time"])
 			timing = text2num(href_list["time"])
+			processing_objects.Add(src)
 			update_icon()
 
 		if(href_list["tp"])

code/modules/chemical/Chemistry-Reagents.dm

@@ -540,6 +540,21 @@ datum
 			description = "A colorless, odorless, tasteless gas."
 			reagent_state = GAS
 			color = "#808080" // rgb: 128, 128, 128
+			reaction_obj(var/obj/O, var/volume)
+				if((!O) || (!volume))	return 0
+				src = null
+				var/turf/the_turf = get_turf(O)
+				var/datum/gas_mixture/napalm = new
+				napalm.nitrogen = volume*10
+				napalm.temperature = T0C
+				the_turf.assume_air(napalm)
+			reaction_turf(var/turf/T, var/volume)
+				src = null
+				var/datum/gas_mixture/napalm = new
+				napalm.nitrogen = volume*10
+				napalm.temperature = T0C
+				T.assume_air(napalm)
+				return
 
 		hydrogen
 			name = "Hydrogen"

code/modules/chemical/Chemistry-Tools.dm

@@ -209,7 +209,7 @@
 
 	attack_self(mob/user as mob)
 		if(active == 2)
-			attached_device.attack_self(usr)
+			attached_device.attack_self(user)
 			return
 		user.machine = src
 		var/dat = {"<B> Grenade properties: </B>
@@ -289,6 +289,13 @@
 				if(beaker_two)
 					beaker_two.loc = get_turf(src.loc)
 
+		c_state(var/i = 0)
+			if(i)
+				icon_state = initial(icon_state) + "_armed"
+			else
+				icon_state = initial(icon_state) + "_locked"
+			return
+
 	large
 		name = "Large Chem Grenade"
 		desc = "An oversized grenade that affects a larger area."
@@ -305,6 +312,7 @@
 
 		New()
 			..()
+			attached_device = new /obj/item/device/assembly/timer(src)
 			var/obj/item/weapon/reagent_containers/glass/beaker/B1 = new(src)
 			var/obj/item/weapon/reagent_containers/glass/beaker/B2 = new(src)
 
@@ -324,6 +332,7 @@
 
 		New()
 			..()
+			attached_device = new /obj/item/device/assembly/timer(src)
 			var/obj/item/weapon/reagent_containers/glass/beaker/B1 = new(src)
 			var/obj/item/weapon/reagent_containers/glass/beaker/B2 = new(src)
 
@@ -343,6 +352,7 @@
 
 		New()
 			..()
+			attached_device = new /obj/item/device/assembly/timer(src)
 			var/obj/item/weapon/reagent_containers/glass/beaker/B1 = new(src)
 			var/obj/item/weapon/reagent_containers/glass/beaker/B2 = new(src)