Bioengineering reasons for increased wear and failure of metal-on-metal (MoM) bearings in hip prostheses have been described. Low wear occurs in MoM hips when the centre of the femoral head is concentric with the centre of the acetabular component and the implants are correctly positioned. Translational or rotational malpositioning of the components can lead to the contact-patch of the femoral ...

 In this paper, we aresupposed to introduce the definitions of n-fold commutative, andimplicative hyper K-ideals. These definitions are thegeneralizations of the definitions of commutative, andimplicative hyper K-ideals, respectively, which have been definedin [12]. Then we obtain some related results. In particular wedetermine the relationships between n-fold implicative hyperK-ideal and n-fol...

The purpose of this study was to compare the short-term strength and neural adaptations to eccentric and concentric training at equal force levels. Forty-two sedentary women (age = 21.5 yr) were ranked based on the initial quadriceps strength score, and trios of subjects were randomly assigned to either an eccentric (n = 14), a concentric (n = 14), or a nonexercising control group (n = 14). Tra...

We reviewed the absolute amd differential growths of the myocyte populations in the left (L) and right (R) ventricular myocardium morphometrically from 1 to 5 days and from 5 to 11 days after birth. From 1 to 11 days hypertrophy of the average myocyte in the ventricles was (L) 2.7and (R) 2.4-fold, and myocyte proliferation was (L) 2.0and (R) 1.2-fold. Mean cell volume, cell length, and percent ...

Owing to their pathogenical role and unique ability to exist both as soluble proteins and transmembrane complexes, pore-forming toxins (PFTs) have been a focus of microbiologists and structural biologists for decades. PFTs are generally secreted as water-soluble monomers and subsequently bind the membrane of target cells. Then, they assemble into circular oligomers, which undergo conformational...

purpose: to report a young patient with microphthalmos associated with bilateral papillomacular fold and severe hyperopia case report: in this observational case report, a sixteen-year-old young man was referred with high hyperopia to al-zahra eye hospital, zahedan university of medicalf sciences, zahedan, iran, for check up. spherical error in right eye (re) was +14.75 d and in the left eye (l...

Irregular, concentric zones of increased signal on T2-weighted cranial MR imaging studies may strongly suggest Balo concentric sclerosis (BCS), a rare but recognized variant of multiple sclerosis. Differentiating BCS from multiple sclerosis or neoplasm can be difficult clinically, but MR imaging findings noted in this case may be pathognomonic.