A new chart of the coast of Africa between cape Blanco and River Gambia / Laurie & Whittle

Additional file 4: Table S2. Significantly enriched Kyoto Encyclopedia of Genes and Genomes (KEGG) pathways of differentially expressed genes identified from pairwise comparisons between matured and young rhizome, young rhizome and fibrous root, matured rhizome and fibrous root libraries

Effects of the Cooling Equipment Based on Cooled Atomization Air on Environmental Physicochemical Indexes and Sedimental Microbial Community Structure of Sea Cucumber Culture Ponds in Summer

In recent years, continuous high temperature and marine heat waves in summer have become major limitations for the sustainable development of sea cucumber aquaculture. In 2019, our team invented a cooling equipment based on cooled atomization air, which can reduce the water temperature of the culture pond in summer. Previous tests showed that the survival rates of the sea cucumbers in the equipped ponds were higher than the unequipped ponds during the high temperature. In this study, five equipped ponds were selected as experimental groups (groups E1 and E2 were labeled according to their geographic location) and three unequipped ponds were selected as control groups (labeled group C), then the water quality, sedimental quality, and the sedimental microbial community structure of the eight ponds were analyzed in order to reveal the mechanism of the higher survival rate using the cooling equipment. The results showed that the temperature of the bottom water of the two experimental groups was significantly lower than that of the control group (P < 0.05). The dissolved oxygen (DO) level in the bottom water of the experimental groups was significantly higher than that of the control group (P < 0.05). Both the ammonia nitrogen concentration in the bottom water and the concentrations of nitrite nitrogen, and chemical oxygen demand (COD) and ammonia nitrogen in pond sediments of the two experimental groups were significantly lower than that of the control group (P < 0.05). The sedimental microbial community structure of all the ponds was also investigated, and the OTUs (optical transform units) were numbered from 707 to 808. Alpha diversity analysis showed that the abundance and diversity of the experimental group were higher than those of the control group. PCoA (principal coordinates analysis) showed that the bacterial composition and community structure among the two experimental groups were more similar, while there were significant differences between the experimental and the control groups. The species distribution analysis on the order level showed that the similarity between the two experimental groups is higher than that between the experimental and control groups. The relative abundance of Rhizobiales, Lactobacillales, and Micrococcineae in the experimental groups were significantly higher than that in the control groups. Thirteen OTUs with significant differences among three groups were selected using LEfSe (LDA effect size) analysis. The correlation analysis between microbial community structure and environmental factors showed that the abundance of microbial species involved in the nitrogen cycle was significantly higher in the experimental groups than that of the control groups. Then OTU7, OTU29 and OTU108 were screened and significant correlation was found with ammonia nitrogen concentration in all of the tested ponds, and they are classified as Ochrobactrum, Escherichia-Shigella and Bacillus, respectively. In the 25 predicted COG (clusters of orthologous groups of proteins) metabolic pathways in prokaryotes, 18 metabolic pathways exhibited significant differences (P < 0.05) between the experimental groups and the control groups. All the results indicated that the use of the equipment could significantly improve the pond water quality and sediment environment, and positively affect the sedimental microbial community structure of the bottom water. The results of this study would provide scientific support for the popularization and application of the equipment

Association of three insulin resistance indices with hypertension and body weight among Uyghur adults in rural areas of Xinjiang, China

Abstract Obesity and insulin resistance are significant contributors to hypertension. There is a high prevalence of obesity among Uyghurs in the rural areas of Xinjiang, China. Therefore, this study aimed to explore the association between insulin resistance indices and hypertension according to different body weights in rural Uyghur residents of Xinjiang, China. A total of 12 813 local Uyghur residents were recruited for the study. Excluding those with incomplete data and those using antihypertensive, lipid‐lowering, or glycemic drugs, 9577 permanent residents were eligible for the study. Three insulin resistance indicators were calculated: triglyceride to high‐density lipoprotein cholesterol ratio, product of fasting triglyceride and glucose (TYG), and metabolic score for insulin resistance. Multivariate logistic regression analysis was performed to estimate the association between the three non‐insulin‐based insulin resistance indices and the risk of hypertension for different body weights. TYG was significantly associated with hypertension in the normal‐weight group, particularly in women. In the obese group that was obese, all three indicators were associated with hypertension. Since TYG was associated with hypertension in the groups with normal weight and obesity, it may be useful as a reference indicator for insulin resistance. This indicator may provide a basis for the identification and management of hypertension risk among adults in the Uyghur population

Highly efficient Co3O4/Co@NCs bifunctional oxygen electrocatalysts for long life rechargeable Zn-air batteries

© 2020 Elsevier Ltd Rational design and synthesis of high-performance bifunctional oxygen electrocatalysts are in high demand for metal air batteries. Herein, Co3O4/Co nano-heterojunctions tailored in nitrogen-doped porous graphitized carbon frameworks (Co3O4/Co@NCs) are synthesized via annealing Co-based metal-organic-frameworks (Co-based MOFs). This structure for electrocatalysts with a combination of mixed metallic Co species and encapsulating porous graphitized carbon offers an efficient charge/mass transport environment. In addition, the Co3O4/Co nano-heterostructured interfaces serve as efficient reactive sites to enhance oxygen electrocatalysis. Furthermore, the strong binding forces between nanoparticles and carbon frameworks through Co–N covalent bonds prevent the loss of nanoparticles from the electrocatalysts, providing outstanding durability. Consequently, Co3O4/Co@NCs surpasses the performance of noble-metal catalysts with a positive half-wave potential of 0.92 V (vs. reversible hydrogen electrode, RHE) for the oxygen reduction reaction and a low potential of 1.55 V at 10 mA cm−2 for the oxygen evolution reaction. Impressively, our assembled zinc–air batteries using Co3O4/Co@NCs as the rechargeable air electrode exhibit superior charge-discharge performance and ultra-stable cyclability with almost no increase in polarization even after 600 h (10 mA cm−2), possessing great potential for practical application in next-generation rechargeable batteries