Bone loss in patients with spinal cord injury: Incidence and influencing factors.

Purpose: To investigate the incidence and influencing factors of bone loss in patients with spinal cord injury (SCI).

Methods: A retrospective case-control study was conducted. Patients with SCI in our hospital from January 2019 to March 2023 were collected.

Hip subluxation in children with spinal cord injury: Incidence and influencing factors.

Hip subluxation is a common complication in children with spinal cord injury. This study aimed to investigate the incidence and influencing factors of hip subluxation and discuss prevention strategies. Medical records of children with spinal cord injury were reviewed.

Clinical characteristics of pediatric traumatic spinal cord injury in China: A single center retrospective study.

Objective: To investigate the clinical characteristics of children with traumatic spinal cord injury (SCI) admitted to a research rehabilitation center between 2011 and 2020, with a view to generate crucial data for understanding and prevention of pediatric traumatic SCI.

Design: Retrospective cohort study.

Setting: The National Rehabilitation Research Center of China, Beijing, China.

Prognosis of traumatic spinal cord injury in children: Follow-up of 86 patients.

Purpose: The long-term situation of children with spinal cord injury (SCI) was investigated, and suggestions for helping them better return to the society were provided.

Methods: SCI patients less than 18 years old hospitalized in Beijing Boai Hospital from January 2011 to December 2020 were retrospectively analyzed. Information including motor function, complications, characteristic changes, self-care abilities, school attendance and social participation were collected by telephone interview and electronic questionnaire.

Enhanced optical properties of chemical vapor deposited single crystal diamond by low-pressure/high-temperature annealing.

Single crystal diamond produced by chemical vapor deposition (CVD) at very high growth rates (up to 150 microm/h) has been successfully annealed without graphitization at temperatures up to 2200 degrees C and pressures <300 torr. Crystals were annealed in a hydrogen environment by using microwave plasma techniques for periods of time ranging from a fraction of minute to a few hours. This low-pressure/high-temperature (LPHT) annealing enhances the optical properties of this high-growth rate CVD single crystal diamond.

[Distribution of nitrogen and hydrogen in diamond and its significance to nucleation and growth of diamond].

From the center to the rim of natural diamond there are differences in nitrogen and C-H bond contents, suggesting that diamond was formed under varying substance conditions. Both the nitrogen and C-H bond contents tend to decrease from the center to the rim as a whole, indicaing that nitrogen and hydrogen are expended little by little during the formation of diamond. But in the middle area of the sample both the nitrogen and C-H bond contents have a tendency to increase.

[Spectroscopic studies on transition metal ions in colored diamonds].

Transition metals like nickel, cobalt and iron have been often used as solvent catalysts in high pressure high temperature (HPHT) synthesis of diamond, and nickel and cobalt ions have been found in diamond lattice. Available studies indicated that nickel and cobalt ions could enter the lattice as interstitial or substitutional impurities and form complexes with nitrogen. Polarized microscopy, SEM-EDS, EPR, PL and FTIR have been used in this study to investigate six fancy color natural and synthetic diamonds in order to determine the spectroscopic characteristics and the existing forms of transition metal ions in colored diamond lattice.