Sentence examples for been difficult to examine from inspiring English sources

Because the gene targeting deletion method of non-model organisms including Brassica has not been developed, it has been difficult to examine the necessity and roles of the identified candidates in self-incompatibility mechanism in Brassica.

In spite of the importance of the var genes and extensive studies of their diversity [ 5, 10], the early evolution of the var genes has been difficult to examine because frequent recombination among paralogs renders traditional methods for examining evolution, such as phylogenetic inference, ineffective.

As MDCT angiography is now well-established as the method of choice for the diagnosis of most of the different arterial pathological conditions in the abdomen [ 4], it would have been difficult to examine all included patients with an additional intra-arterial DSA for the purposes of our study.

Women's experiences of physical examination mirrors the strategies reported by professionals who have experience of women who are difficult to examine, although guidelines for more therapeutic examination do exist [ 32].

Amongst the disadvantages of US are the facts that the examination is operator dependent and not reproducible and that it is difficult to examine the whole GI tract, with additional difficulties in obese children and in case of gas fullness of the bowel.

Unfortunately they are hung so far above eye level it is difficult to examine them closely.

Pidgeon said it was difficult to examine the reasons for people's attitudes in quantitative surveys such as this.

It is difficult to examine Mr. Slimane's photo work separately from his reign atop the world of men's fashion.

Mr. Owens said he thought that it would be unfair to sell online shoppers many used items because it was difficult to examine them closely enough online to determine if they met standards of cleanliness.

But, before I start, I thought I'd look at the process of putting one word after another – the process that no one but the author really sees – the process that is difficult to examine properly, even in one-to-one sessions with students.

However, ligaments, retinacula and fascia appear less light in colour and are difficult to examine.