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However, the names of all SI mass units are based on gram, rather than on kilogram; thus 10 3 kg is a megagram (10 6 g), not a *kilokilogram. The tonne (t) is an SI-compatible unit of mass equal to a megagram (Mg), or 10 3 kg. The unit is in common use for masses above about 10 3 kg and is often used with SI prefixes.
The kilogram, symbol kg, is the SI unit of mass. It is defined by taking the fixed numerical value of the Planck constant h to be 6.626 070 15 × 10 −34 when expressed in the unit J⋅s, which is equal to kg⋅m 2 ⋅s −1, where the metre and the second are defined in terms of c and Δν Cs. —
The abundance of elements in Earth's crust is shown in tabulated form with the estimated crustal abundance for each chemical element shown as mg/kg, or parts per million (ppm) by mass (10,000 ppm = 1%).
The oral LD 50 of nivalenol was found to be 38.9 mg/kg bw in mice whereas the intraperitoneal, subcutaneous and intravenous routes of exposure gave LD 50 values of 5–10 mg/kg bw. In mice already within 3 days the most deaths occurred after oral exposure through marked congestion and haemorrhage in intestine, in acute toxicity also lymphoid ...
A 2010 study found the amount of chrysin was 0.10 mg/kg in honeydew honey, and 5.3 mg/kg in forest honeys. [10] A 2010 study found the amount of chrysin in propolis was as much as 28 g/L. [ 10 ] A 2013 study found the amount of chrysin in various mushrooms from the island of Lesvos, Greece, varied between 0.17 mg/kg in Lactarius deliciosus to 0 ...
“This means that an individual weighing 70 kg (154 lbs.) could theoretically consume up to 490 milligrams of red dye No. 40 daily without expected adverse effects, according to these guidelines.”
The median lethal dose is 100 mL (3.4 US fl oz), i.e., 1–2 mL/kg body weight of pure methanol. [65] The reference dose for methanol is 0.5 mg/kg in a day. [66] [67] Toxic effects begin hours after ingestion, and antidotes can often prevent permanent damage. [64]
Azadirachtin is biodegradable (it degrades within 100 hours when exposed to light and water) and shows very low toxicity to mammals (the LD 50 in rats is > 3,540 mg/kg making it practically non-toxic).