Sentence examples for methods require long from inspiring English sources

Several studies have reported good chromatographic separation; however, these methods require long times to separate nucleosides (Djukovic et al. 2010; Cho et al. 2009; Struck et al. 2011; Lee et al. 2004).

However, most of these methods require long preparation times (several hours or a day), involve multiple steps and have high thermal costs, which often result in structural damage in the MWCNTs.

Owing to the relatively similar densities of the oily and aqueous phases in these waste streams, and the nature of the emulsions, gravity-based settling methods require long retention times and bulky equipment to separate the two phases.

Some of these methods require long residence times, high energy consumption, and carry the risk of sugar degradation when pretreatment is conducted at high temperatures [ 8, 9].

A range of methods using chromatographic separation have been developed in the past [ 8– 11], but usually, these methods require long run times (>50 min) and are not suitable for high-throughput screening and analysis of a large number of plant samples.

Bayard's method required long exposures in which sitters were requested to keep their eyes closed rather than blink.

The GPC algorithm, which is a class of digital control method, requires long computational time.

However, seismic analysis based on the finite element method requires long computation times as well as huge storage space.

The design of discrete-time ideal filters by finite impulse response (FIR) method requires long FIR filter structures.

Co-cultivation of some fungal strains have been reported to be able to assist algal flocculation [ 6, 20, 21], however, this method requires long culture time [ 3], and is not applicable for harvesting all microalgae.

This method requires long and active periods in the site of study to learn, experience and represent the lives of subjects in their natural setting (Van der Geest and Sarkodie 1998; Emerson et al. 2005).