The phrase "a two fold increasing" is not correct in standard written English.
It seems to be an attempt to describe something that is increasing in two ways or dimensions, but the phrasing is awkward and unclear.
Example: "The project has shown a two-fold increase in productivity over the last quarter."
Alternatives: "a twofold rise" or "a twofold growth".
We found that having an older brother who currently smokes is associated with a two fold increased odds of being susceptibility to smoking (OR = 2.65).
They represent an essential bacterial survival strategy since biofilm-associated bacteria can reach a thousand fold increased protection against antimicrobial agents compared to their planktonic counterparts [1], [2].
Firstly, we found a six fold increased risk of venous thromboembolism in the 28 days after hospital discharge.
This study was prompted by a recent prospective study reporting a three fold increased risk of cryptorchidism among sons of 113 female greenhouse workers [ 31].
Prolonged episodes of fever are known to cause induction of heat shock protein response along with a two-three fold increased risk of infantile ASD [ 84- 86].
Aggregation of CUG RNAs within the cytoplasm results both in Mbnl1 sequestration and in approximately a two fold increase in both nuclear and cytoplasmic Cug-bp1 levels.
The blend hydrogel scaffold showed a two fold increase in cell number over control within three days of culture.
Comparing the performance of each configuration showed a two fold increase in stiffness and strength as a result of bonding between the concrete core and GFRP tube.
Efficient cross-linking was observed when ammonium sulphate was used as precipitant along with a two fold increase in activity in presence of SDS.
In addition, a two fold increase in bandwidth (∼30 THz) and cross-section (∼6.00E+06 nm2) has been observed in case of graphene.
The hydrolysate was subjected to fermentation by S. cerevisiae and led to the production of 18.642 g/l of ethanol with a fermentation efficiency of 74%, which was a two fold increase in yield compared to the control.
