"not much effective" is a correct phrase and can be used in written English.
It is often used to describe something that has limited or little impact or effectiveness. For example: - The new marketing campaign was not much effective in increasing sales. - The medicine was not much effective in treating my cold. - The protest did not have much of an impact; it was not much effective in bringing about change.
Initial clinical studies revealed that single antiangiogenic agents are not much effective in advanced stage tumors.
The classifiers used to train the features are also not much effective.
In the proposed scheme, an evaluating node uses the trust attributes based on local states and its own observation; collusion attack is not much effective against the scheme.
It is observed that the selected fruit pulps were not much effective in the 400 g/L sugar fermentation when compared to the 300 g/L sugar fermentation.
The results suggest that a time invariant formulation of the travel time distribution is usually inappropriate and not much effective in predicting transport.
Around visible spectrum and at higher wavelengths, the transmittance for the as-deposited ITO approaches that of the annealed ITO (i.e., annealing is not much effective here in improving transparency).
Others are refusing to buy new drugs that are more expensive but not much more effective than generic versions.
Repellents, sprays and other passive methods are ultimately not much more effective than begging and pleading, and far more expensive.
In both K-12 and higher education, technology remains supplemental to chalk-and-talk practices as old as the hills, and not much more effective from a pedagogical standpoint.
In one of the trials, which examined the efficacy of the drug methotrexate in treating systemic sclerosis an autoimmune disease that causes scarring of the skin and internal organs the original researchers found the drug to be not much more effective than the placebo, as they reported in a 2001 paper.
Replacement with 20 ml of 10% calcium gluconate when the adjusted calcium is between 2.0 and 2.15 mmol/l is not much more effective than no replacement.
