Outcome and risk factors of ulcer healing after gastric endoscopic submucosal dissection: A systematic review and meta-analysis.

Background: Endoscopic submucosal dissection (ESD) is widely utilized for the treatment of large adenomas, submucosal lesions, and early gastric cancer. A significant artificial ulcer typically forms after ESD. Delayed or incomplete healing of these ulcers can result in complications such as delayed bleeding and perforation.

[Community Diversity of Eukaryotic Nano-phytoplankton in Yellow Sea Using DNA Metabarcoding Technology Based on Multiple Amplicons].

Eukaryotic nano-phytoplankton plays an indispensable role in energy flow, material circulation, and stability maintenance of marine ecosystems. In this research, DNA metabarcoding technology was applied to elucidate the distribution features of eukaryotic nano-phytoplankton in the Yellow Sea for the first time. The community structure and diversity of eukaryotic nano-phytoplankton were compared based mainly on amplicons of internal transcribed spacer (ITS), 18S rDNA V4 and 18S rDNA V9.

[Eukaryotic Micro-plankton Community Diversity and Characteristics of Regional Distribution in the Yellow Sea by ITS High-throughput Sequencing].

Eukaryotic micro-plankton plays a key role in the marine biotic community and in maintaining the stability of the marine ecosystem. In order to determine the diversity and characteristics of eukaryotic micro-plankton in the Yellow Sea, Illumina high-throughput sequencing, based on gene markers of ITS, was conducted. An analysis of the relationship between community structure and environmental factors was conducted as well.

[Responses of the Benthic Diatom Community to Nutrients and the Identification of Nutrient Thresholds in Three Aquatic Ecoregions of the Huntai River, Northeast China].

Benthic diatom communities and nutrient gradients were investigated from 287 sampling sites in three aquatic ecoregions (AE) of the Huntai River to characterize the spatial distribution of nutrients and the benthic diatom communities. Locally weighted scatterplot smoothing (LOWESS) was used to analyze the thresholds for nitrogen and phosphorus. The results showed that:① The concentration of ammonia nitrogen and total phosphorus significantly differs in the three AEs, and shows a tendency of AEⅠ < AE Ⅱ < AE Ⅲ.

[Impact of Talc Ore Mining on Periphyton Community Structure and Water Environment].

In order to explore the impact of Talc ore mining on aquatic ecosystems, periphyton communities and environmental factors from control portion, impacted portion and recovery portion separately were investigated and analyzed. Samples were collected from upstream Tanghe River (an important tributary of Tazi River) in November 2015, April 2016, and July 2016. Mann-Whitney U test was applied to compare the differences in environmental factors and periphyton community structures among three portions.

[Community Structure Characteristics of Eukaryotic Planktonic Algae in Liaohe River Through High-throughput Sequencing].

Eukaryotic phytoplankton plays an important ecological function in river ecosystem. The 18S rRNA gene V4 variable region of the environmental samples in Liaohe river was sequenced by using 454 pyrosequencing technology. The reprehensive sequences of OTUs were annotated, and then the OTUs list was compared to the species list obtained by microscope observation.

In situ detrimental impacts of Prorocentrum donghaiense blooms on zooplankton in the East China Sea.

Large-scale algal blooms of the dinoflagellate Prorocentrum donghaiense have occurred frequently in the East China Sea (ECS) in recent decades. However, its impacts on the zooplankton in situ are still under not well understood. During a spring P.