ances ▁of ▁m ish ap ▁and ▁loss ▁to ▁men , ▁money , ▁materials ▁and ▁machines . ▁ ▁Acc idents ▁▁ ▁On ▁ 2 5 ▁April ▁ 2 0 0 2 , ▁an ▁explos ion ▁at ▁a ▁solid ▁prop ell ant ▁processing ▁unit ▁and ▁its ▁resulting ▁fire ▁killed ▁six ▁H EM RL ▁personnel , ▁including ▁two ▁scient ists . ▁A ▁court ▁of ▁inqu iry ▁was ▁ordered . ▁The ▁explos ion ▁was ▁due ▁to ▁sudden ▁reaction ▁between ▁sensitive ▁chemical s . ▁▁ ▁On ▁ 3 0 ▁September ▁ 2 0 0 9 ▁an ▁explos ion ▁took ▁place ▁at ▁this ▁labor atory ▁leading ▁to ▁susp ension ▁of ▁explos ives ▁processing ▁for ▁a ▁week . ▁ ▁References ▁ ▁External ▁links ▁▁ ▁H EM RL ▁Home ▁Page ▁▁▁ ▁Category : 1 9 6 0 ▁establish ments ▁in ▁India ▁Category : Def ence ▁Research ▁and ▁Development ▁Organisation ▁labor ator ies ▁Category : Material s ▁science ▁instit utes ▁Category : Res earch ▁instit utes ▁established ▁in ▁ 1 9 6 0 ▁Category : Res earch ▁instit utes ▁in ▁P une ▁Category : Res earch ▁instit utes ▁in ▁Mah ar as ht ra ▁Category : Res earch ▁and ▁development ▁in ▁India <0x0A> </s> ▁Mobile ▁advert ising ▁is ▁a ▁form ▁of ▁advert ising ▁via ▁mobile ▁( wire less ) ▁ph ones ▁or ▁other ▁mobile ▁devices . ▁It ▁is ▁a ▁subset ▁of ▁mobile ▁market ing . ▁ ▁It ▁is ▁estimated ▁that ▁mobile ▁app - installed ▁ad s ▁account ed ▁for ▁ 3 0 % ▁of ▁all ▁mobile ▁advert ising ▁re venue ▁in ▁