Refer to the passage below and then answer the question afterwards in the same language as the passage: Passage: Niobium has no known biological role. While niobium dust is an eye and skin irritant and a potential fire hazard, elemental niobium on a larger scale is physiologically inert (and thus hypoallergenic) and harmless. Inowanzoshandiswa muzvishongo uye yakaedzwa kuti ishandiswe mune zvimwe zvekurapa. Makemikari ane niobium anowanzosangana nevanhu vazhinji, asi mamwe ane chepfu uye anofanirwa kurapwa nekuchenjerera. Kuiswa kwenguva pfupi uye kwenguva refu kune niobiates uye niobium chloride, makemikari maviri anonyungudika mumvura, akaedzwa mumakonzo. Makonzo akarapwa nejekiseni rimwe chete re niobium pentachloride kana niobiates anoratidza muyero unouraya (LD pakati pe10 mg / 100 kg) uye 100 mg / kg. Kune yakaderera muyero inoburitswa nemakonzo; kudzidza kunoitwa mushure memazuva manomwe.
hapana basa rinozivikanwa rezvinhu zvipenyu