The Arctic Ocean (AO) is the most river-influenced ocean. Located at the land-sea interface wherein phytoplankton blooms are common, Arctic coastal waterbodies are among the most affected regions by climate change. Given phytoplankton are critical for energy transfer supporting marine food webs, accurate estimation of chlorophyll a concentration (Chl), which is frequently used as a proxy of phytoplankton biomass, is critical for improving our knowledge of the Arctic marine ecosystem and its response to the ongoing climate change.
View Article and Find Full Text PDFThe theoretical digging force is the maximum digging resistance that an excavator can overcome, which is an important measure of its digging capacity. To study the matching of the digging capacity with the actual demand and the matching of the working device mechanism, a 36.5 t backhoe hydraulic excavator is used as an example to analyse the distributions of the digging resistance under two different normal digging area working conditions and the maximum digging resistance characteristics of the tool.
View Article and Find Full Text PDFRisk Manag Healthc Policy
September 2020
Purpose: To understand the characteristics of risk perception of influenza pandemic in college students with prominent frequency and the differences between these risk perceptions and professionals. Then, offering a proposal for the government to improve the efficiency of risk communication and health education.
Methods: According to the mental model theory, researchers first draw a framework of key risk factors, and then they ask these students about the understanding of the framework with questionnaire and then making concept statistics and content analysis on the respondents' answers.
Medicine (Baltimore)
November 2019
Background: Shegan Mahuang Decoction (SMD) was used widely for treatment of asthma in China; however, the clinical effect of SMD on asthma was not well concluded.
Methods: Seven electronic databases (Medline, Cochrane library, EMBASE database, Chinese National Knowledge Infrastructure, Wanfang database, Chongqing VIP database, and Chinese Biomedicine database) will be searched for randomized controlled trials which meet the eligible criteria. Two reviewers will select studies and extract data independently.
Controlling pesticide residues in marketed fruits and vegetables is an essential issue for food safety and public health. Local governments improve local conditions, like policymaking and implementation, economic structure and development level, and agricultural practices, to control pesticide residues. However, the level of influence and relative importance of these local factors are not analyzed quantitatively.
View Article and Find Full Text PDFBackground: Meropenem exhibits time-dependent antimicrobial activity and prolonged infusion (PI) (extended infusion or continuous infusion, EI or CI) of meropenem can better achieve pharmacodynamics target when comparing with intermittent bolus (IB). However, the clinical outcomes between two groups remain inconclusive.
Objective: To evaluate current published literatures by meta-analysis to ascertain whether PI of meropenem can improve clinical outcomes.
The threshold of sea ice concentration (SIC) is the basis for accurately calculating sea ice extent based on passive microwave (PM) remote sensing data. However, the PM SIC threshold at the sea ice edge used in previous studies and released sea ice products has not always been consistent. To explore the representable value of the PM SIC threshold corresponding on average to the position of the Arctic sea ice edge during summer in recent years, we extracted sea ice edge boundaries from the Moderate-resolution Imaging Spectroradiometer (MODIS) sea ice product (MOD29 with a spatial resolution of 1 km), MODIS images (250 m), and sea ice ship-based observation points (1 km) during the fifth (CHINARE-2012) and sixth (CHINARE-2014) Chinese National Arctic Research Expeditions, and made an overlay and comparison analysis with PM SIC derived from Special Sensor Microwave Imager Sounder (SSMIS, with a spatial resolution of 25 km) in the summer of 2012 and 2014.
View Article and Find Full Text PDFProstaglandins Other Lipid Mediat
September 2010
Sub-acute hypoxia causes pulmonary vasoconstriction (HPV) is associated with increased intracellular Ca(2+) concentration ([Ca(2+)](i)) and contraction of pulmonary arterial smooth muscle cells (PASMCs). We previous have demonstrated that 15-hydroxyeicosatetraenoic acid (15-HETE), a metabolite of arachidonic acid by 15-lipoxygenase (15-LO), causes elevated [Ca(2+)](i) in PASMCs partly through Ca(2+) entry via other than L-type Ca(2+) channels. In this study, we used SKF96365/La(3+) (SOCC antagonists) and Nordihydro-guiairetic acid (NDGA, a blockage of 15-LO) to examine the effect of 15-HETE on capacitative Ca(2+) entry and activity/expression of store-operated Ca(2+) channels (SOCCs) during sub-acute hypoxic procedure and the contribution of SOCCs on the maintenance of vascular tones.
View Article and Find Full Text PDF1. The hyperpolarization-induced, cation-selective current I(h) is widely observed in peripheral sensory neurons of the vagal and dorsal root ganglia, but the peak magnitude and voltage- and time-dependent properties of this current vary widely across afferent fibre type. 2.
View Article and Find Full Text PDFBackground: Hepatic angiomyolipoma is a rare mesenchyme-derived neoplasm often misdiagnosed as hepatocellular carcinoma, and the treatment for it remains controversial.
Aims: To develop the optimal preoperative diagnoses means and treatment modalities of hepatic angiomyolipoma.
Methods: Retrospective analysis of the clinical features, treatment, and prognostic data of 17 hepatic AML patients admitted to Chinese People's Liberation Army Generation Hospital between 1996 and 2006.