Graphitic platform for self-catalysed InAs nanowires growth by molecular beam epitaxy.

We report the self-catalysed growth of InAs nanowires (NWs) on graphite thin films using molecular beam epitaxy via a droplet-assisted technique. Through optimising metal droplets, we obtained vertically aligned InAs NWs with highly uniform diameter along their entire length. In comparison with conventional InAs NWs grown on Si (111), the graphite surface led to significant effects on the NWs geometry grown on it, i.

Vitamin D with calcium reduces mortality: patient level pooled analysis of 70,528 patients from eight major vitamin D trials.

Introduction: Vitamin D may affect multiple health outcomes. If so, an effect on mortality is to be expected. Using pooled data from randomized controlled trials, we performed individual patient data (IPD) and trial level meta-analyses to assess mortality among participants randomized to either vitamin D alone or vitamin D with calcium.

Long-term follow-up for mortality and cancer in a randomized placebo-controlled trial of vitamin D(3) and/or calcium (RECORD trial).

Context: Vitamin D or calcium supplementation may have effects on vascular disease and cancer.

Objective: Our objective was to investigate whether vitamin D or calcium supplementation affects mortality, vascular disease, and cancer in older people.

Design And Setting: The study included long-term follow-up of participants in a two by two factorial, randomized controlled trial from 21 orthopedic centers in the United Kingdom.

Falls, sarcopenia, and growth in early life: findings from the Hertfordshire cohort study.

Recent studies have shown that people whose early growth is poor have an increased risk of sarcopenia. Sarcopenia is an important risk factor for falls, but it is not known whether poor early growth is related to falls. The authors investigated this association in the Hertfordshire Cohort Study (1998-2004), where 2,148 participants from the United Kingdom provided their history of falls.

Knee pain, knee osteoarthritis, and the risk of fracture.

Objective: Patients with osteoarthritis (OA) have increased bone mineral density; however, the association between knee OA and fracture is controversial. Few data exist on the association between knee pain and fracture. We examined the association of knee OA and knee pain with fracture and falls in elderly men and women.

Vitamin D supplementation and the prevention of fractures and falls: results of a randomised trial in elderly people in residential accommodation.

Objectives: To determine whether vitamin D supplementation reduces the risk of fracture or falls in elderly people in care home accommodation.

Design: A randomised controlled trial of cluster design.

Setting And Subjects: 223 Residential units (mainly identical 30-bedded units), within 118 homes for elderly people throughout Britain, with 3,717 participating residents (76% women, average age 85 years).