[Comparison on Performance of Quantitative Ultrasound and Dual-Energy X-ray Absorptiometry in Evaluating Bone Health of Adults Aged 18-40 Years].

Objective To compare the consistency of quantitative ultrasound(QUS)and dual-energy X-ray absorptiometry(DXA)in measuring bone mineral density(BMD)of adults aged 18-40 years in Guangzhou and evaluate the diagnostic value of QUS for identifying low bone mass.Methods DXA was employed to measure the BMD and QUS to measure the speed of sound(SOS)in 731 participants.The Bland-Altman analysis was performed to evaluate the consistency of Z scores between SOS and BMD.

[Association Between Dietary Knowledge and Food Preferences in Residents Aged 18 and Over in China Based on Latent Class Analysis].

Objective To investigate the food preferences and explore the potential association between dietary knowledge and food preferences in residents aged 18 and over in China,so as to provide a basis for promoting healthy diets.Methods The latent class analysis was carried out with the 2015 cross-sectional data of China health and nutrition survey to categorize the food preferences among 8 783 residents aged 18 and over.Multinomial Logistic regression was adopted to assess the association between and dietary knowledge and food preferences.

[Association between early-life factors and pubertal timing in girls].

Objectives: To study the association between early-life factors (including birth weight, method of birth, gestational age, and history of gestational metabolic disorders) and pubertal timing in girls.

Methods: The stratified cluster sampling method was used to select the girls in grades 2-3 and 7-8 from three primary schools and three middle schools in Guangzhou, China from March to December, 2019, and breast development was examined for all girls. A questionnaire survey was performed to collect the information on early-life factors.

Research on the Creep Model of Deep Coal Roadway and Its Numerical Simulation Reproduction.

The long-term stability of coal mine roadway engineering is critical to the safe mining of coal resources and the protection of the surface environment. In this paper, the creep test of coal samples in coal roadway was carried out by multi-stage constant load method, and the test results showed that when the stress level was low, the creep curve had a attenuated stage and a steady-state stage, and the steady-state creep rate tended to increase with the increase in the stress level; When the stress level was higher than the yield stress, the creep rate curve appeared to have an acceleration stage after the steady-state stage. The instability failure mode of the coal sample was mainly shear failure with local tension failure.

Association of body composition with pubertal timing in children and adolescents from Guangzhou, China.

Objective: An ongoing debate surrounds the relationship between body composition and pubertal timing, in particular for boys. This cross-sectional study aimed to investigate the association of body composition with pubertal timing among children and adolescents.

Methods: A total of 1,493 boys and 1,261 girls who entered puberty were enrolled in Guangzhou, China.

Chemical Diversity and Anti-Insect Activity Evaluation of Essential Oils Extracted from Five Species.

As a source of aromatic plants, the genus Artemisia has long been considered to have the potential to develop plant pesticides. In this study, components of essential oils from A. dalai-lamae, A.

Sesquiterpenoid-rich Essential Oils from Two Magnolia Plants: Contact and Repellent Activity to Three Stored-product Insects.

Stored products have been damaged by insects. Multiple approaches for pest management are employed. Among these approaches, botanical insecticide is an emerging one.

Measuring upper limb function and patient reported outcomes after major breast cancer surgery: a pilot study in an Asian cohort.

Background: Breast cancer is the most common cancer in women worldwide. Major breast cancer surgery especially with axillary lymph node dissection (ALND), is associated with upper limb functional decline. Majority of studies are conducted in Western population and may not be applicable to Asians.

Different transmission routes and the risk of advanced HIV disease: A systematic review and network meta-analysis of observational studies.

Background: A substantial proportion of people living with HIV (PLHIV) present for care with advanced HIV disease (AHD), which may result in difficulty reaching the "90-90-90" target to end AIDS in 2030. We assessed the risk of AHD for different transmission routes to summarize the evidence for priority prevention strategies for key populations.

Methods: Observational studies published before September 10th, 2019 in the PubMed, EMBASE, Web of Science and Chinese electronic databases were analysed.

Burns in a major burns center in East China from 2005 to 2014: Incidence and outcome.

Objective: Information about epidemiology on burns is rare in China. The aim of this article is to describe the pattern of burns in East China during a 10-year time period.

Method: A retrospective data analysis was performed on all hospitalized patients to the burn center at the Changhai hospital, one of major burn centers in East China, from 2005 to 2014.

BurnCalc assessment study of computer-aided individual three-dimensional burn area calculation.

Background: Accurate estimation of a burned area is crucial to decisions about fluid resuscitation, surgical options, nutritional support, and prognosis. Widely used clinical methods to estimate a burn area are two-dimensional. They do not consider age, sex, body mass, physical deformities, or other relevant factors.

Effect of tongxinluo on vasoconstriction induced by the chronic injury of the adventitia in the rat carotid artery.

Objective: Tongxinluo (TXL) is a traditional Chinese medicine that is developed on the meridian theory of traditional Chinese medicine, with the function of alleviating the angina. The present study was undertaken to explore the molecular mechanism of TXL in treating the pectoris angina through observing the effectiveness of TXL superfine powder on the vasoconstriction and the activation of RhoA/Rho-kinase pathway induced by the injury of the adventitia.

Methods: 36 male Wistar Kyoto rats were assigned to 3 treatments (n=12): vehicle, TXL (400 mg kg(-1) day(-1)) and fasudil (15 mg kg(-1) day(-1)).

[Preliminary investigation on the dynamic change in epidermal stem cells under mechanical stress in vivo].

Objective: To observe the distribution of epidermal stem cell (ESC) after soft tissue expansion, and to explore dynamic change in ESC under mechanical stress and kinetic mechanism of skin expansion.

Methods: Skin samples were collected from patients after expansion of the scalp. They were divided into three groups: A group (scalp harvested 3 cm away from the center of dilator), B group (scalp tissues at the edge of dilator), and control group (scalp without dilatation).