Niche convergence and biogeographic history shape elevational tree community assembly in a subtropical mountain forest.

Niche convergence or conservatism have been proposed as essential mechanisms underlying elevational plant community assembly in tropical mountain ecosystems. Subtropical mountains, compared to tropical mountains, are likely to be shaped by a mixing of different geographic affinities of species and remain somehow unclear. Here, we used 31 0.

[Clinical Features and Risk Factors of Systemic Lupus Erythematosus Complicated with Cytomegalovirus Infection].

Objective To explore the clinical characteristics and risk factors of systemic lupus erythematosus(SLE)complicated with cytomegalovirus infection(CMV). Methods The medical records of patients diagnosed with SLE at discharge in the Department of Immunology at Peking Union Medical College Hospital between July 1,2017 and April 1,2019 were retrospectively reviewed,and the clinical and laboratory data related to CMV infection were analyzed. Results Of the 231 patients with SLE,115(49.

[Clinical and Laboratory Characteristics of Disseminated Non-tuberculous Mycobacterial Disease].

Objective To explore the clinical and laboratory characteristics and the prognosis of disseminated non-tuberculous mycobacteria(NTM)diseases in human immunodeficiency virus(HIV)negative patients. Methods Cases of disseminated NTM disease were retrospectively collected in Peking Union Medical College Hospital from January 2012 to October 2018.Clinical manifestations,laboratory findings,treatment,and prognosis of these cases were retrieved from the electronic medical record system.

Diet and feeding behavior of a group of 42 Phayre's langurs in a seasonal habitat in Mt. Gaoligong, Yunnan, China.

In habitats such as temperate evergreen forests, fruit, and seed productivity is reported to exhibit marked changes in seasonal availability, such that fruit is most available in summer and seeds are most available in autumn. Primates living in these habitats, therefore, are expected to adjust their diets in response to the spatial and temporal variation in these food resources. We studied the diet and feeding behavior of a group of 42 Phayre's langurs (Trachypithecus phayrei) living in a northern (24°48'N) montane habitat (1,700-2,350 m) in Mt.

Clinical and Laboratory Characteristics of Patients with Nontuberculous Mycobacterium Bloodstream Infection in a Tertiary Referral Hospital in Beijing, China.

Background: Nontuberculous Mycobacterium (NTM) bloodstream infection (BSI) is relatively rare. We aimed in this study to evaluate the clinical characteristics, laboratory evaluation, and outcomes of patients with NTM BSI.

Methods: We retrospectively reviewed the clinical records of inpatients with NTM BSI at our institution between January 2008 and January 2015 and recorded clinical parameters including age, gender, underlying disease, clinical manifestation, organs involved with NTM disease, species of NTM, laboratory data, treatment and outcome of these patients.

Clinical and Laboratory Diagnosis of Intestinal Tuberculosis.

Background: Tuberculosis (TB) remains a worldwide problem. Intestinal TB (ITB) constitutes a major public health problem in developing countries and has been associated with significant morbidity and mortality. The aim of this study was to characterize the clinical, radiological, endoscopic, and pathological features of ITB and to define the strategy for establishing the diagnosis.

Diagnostic Value of T-cell Interferon-γ Release Assays on Synovial Fluid for Articular Tuberculosis: A Pilot Study.

Background: Tuberculosis (TB) remains a major global public health challenge. Articular TB is an important form of extrapulmonary tuberculosis, and its diagnosis is difficult because of the low sensitivity of traditional methods. The aim of this study was to analyze the diagnostic value of T-SPOT.

Major causes of fever of unknown origin at Peking Union Medical College Hospital in the past 26 years.

Background: Despite the recent advances in medicine, fever of unknown origin (FUO) remains a diagnostic and therapeutic challenge even to expert physicians. To increase the knowledge of FUO, we conducted a retrospective study to investigate the causes of FUO and the change of major causes of FUO during the past 26 years.

Methods: The clinical data were retrospectively analyzed from 997 patients with FUO hospitalized at the Peking Union Medical College Hospital (PUMCH) between January 2004 and October 2010.

[A clinical analysis of AIDS-related non-Hodgkin lymphoma in 5 patients and review of literature].

Objective: To analyze the clinical characteristics of AIDS-related non-Hodgkin lymphoma (ARL) and review relative literature for the diagnosis and treatment of ARL.

Method: The clinical data of ARL patients admitted to Peking Union Medical College Hospital from April 2009 to April 2011 were retrospectively analyzed.

Results: Five male ARL patients aged 32 to 65 years old were included in this retrospective study.

[An analysis of 100 cases of tuberculosis first presenting as fever of unknown origin in a general tertiary hospital].

Objective: To investigate the clinical characteristics of tuberculosis (TB) first presenting as fever of unknown origin (FUO).

Methods: The clinical data of 100 cases of FUO, diagnosed as TB finally, among in-patients in Peking Union Medical College Hospital were analyzed retrospectively.

Results: (1) Sites of TB:there were 39 patients with merely pulmonary TB, 28 patients with merely extrapulmonary TB, and 33 patients with both pulmonary and extrapulmonary TB.

Single-walled carbon nanotubes: geno- and cytotoxic effects in lung fibroblast V79 cells.

With the development of nanotechnology, there is a tremendous growth of the application of nanomaterials, which increases the risk of human exposure to these nanomaterials through inhalation, ingestion, and dermal penetration. Among different types of nanoparticles, single-walled carbon nanotubes (SWCNT) with extremely small size (1 nm in diameter) exhibit extraordinary properties and offer possibilities to create materials with astounding features. Since the release of nanoparticles in an enclosed environment is of great concern, a study of possible genotoxic effects is important.

[Effects of Naoyaojia on structural mechanical properties of femur in rats].

Objective: To study the effect of long term Naoyaojia administration on the structural mechanical properties of rat femurs.

Method: Young wistar rats were treated orally with Naoyaojia at doses of 3, 6, and 12 mg/kg body weight every 2 weeks for 1 year. Beary's bending test was used for determining physical properties of the femur.