Among the factors that contribute to adequate performance of aggregates, abrasion resistance these materials stands out, a parameter strongly related mineral composition rock. Therefore, this work aims analyze and integrate data from Los Angeles tests petrographic analysis gneisses Santa Catarina Granulithic Complex in order understand characteristics can interfere or control results, such as: ...

The treatment of symptomatic cartilage lesions in the glenohumeral joint presents a significant challenge due to poor healing characteristics. Diagnosis of glenohumeral chondral defects is not always clear, and while current imaging modalities are good, many lesions require arthroscopy to fully appreciate. Arthroplasty remains an effective treatment in low-demand patients; however, younger, hig...

Shahejie marl in the Shulu Sag is a crucial resource for unconventional hydrocarbon exploration China. Although breakthroughs have been made tight oil this area, mechanisms underlying formation of reservoir and factors controlling its ‘sweet spots’ not thoroughly studied. To understand pore structure characteristics influencing reservoir, we analyzed core samples from Wells ST1 ST3. A series ex...

Lingunite nanocrystals and amorphous plagioclase (maskelynite) are identified at the contacts between augite and labradorite wedge-shaped interfaces in the doleritic rocks of the Lockne impact structure in Sweden. The occurrence of lingunite suggests that the local pressure was above 19 GPa and the local temperature overwhelmed 1000 °C. These values are up to 10 times higher than previous value...

The purpose of this study was to investigate the relationship between lumbar vertebral microfracture and fatigue loading on young human spine under physiological cyclic compression loads. Thirty-three thoracolumbar vertebrae (T12 to L4) were obtained from 7 adult Chinese male cadavers. They were randomly divided into 5 groups. Cyclical compression was performed for 20,000 cycles with 2 Hz. Load...

We have studied the encapsulation of human progenitor cells into 3D PEG hydrogels. Replication-incompetent lentivirus promoter reporter vectors were found to efficiently detect the in vivo expression of human hepatic genes in hydrogel-encapsulated liver progenitor cells. Similarly, hydrogel-encapsulated cells could be efficiently infected with hepatitis C virus, and progeny infectious virus cou...

The origins of fractures in Martian boulders are unknown. Here, using Mars Exploration Rover 3D data products, we obtain orientation measurements for 1,857 cracks visible in 1,573 rocks along the Spirit traverse and find that Mars rock cracks are oriented in statistically preferred directions similar to those compiled herein for Earth rock cracks found in mid-latitude deserts. We suggest that M...

Radiation-induced damage to the bone is characterised by four main pathological findings: osteoporosis, bone-marrow fibrosis, trabecular microfractures and disseminated areas of focal necrosis. The complications of radiotherapy affecting hip and pelvis are well known, but septic arthritis of the hip joint following pelvic irradiation is a rare occurrence. Radiation-induced damage associated wit...

We studied 37 patients with varus osteoarthritis of the knee to determine the influence of the bone mineral density (BMD) on the varus deformity. There were 15 men (21 knees) and 22 women (38 knees). The mean age of the men was 69 years and of the women 68 years. BMD was measured in the L1-L4 spinal region using dual X-ray absorptiometry. In the women a low level of BMD was associated with varu...