Carbon Nanotube Fibers Prepared by Activating Deactivated Iron Particles in Floating Catalyst Chemical Vapor Deposition Tail Gas

Catalysts can determine the structure and properties of carbon nanotube (CNT) fibers fabricated using the floating catalyst chemical vapor deposition (FCCVD) method. The tail gas left over when CNT fibers are fabricated by the FCCVD method has been proven to contain deactivated iron nanoparticles, as well as carbide gas and hydrogen. This study demonstrates that the deactivated iron nanoparticles in tail gas can be successfully activated in a double furnace system under certain conditions. CNT fibers can be successfully prepared using the activated iron nanoparticles by adding the precursor without the catalyst. These CNT fibers are composed of double-walled carbon nanotubes (DWNTs) and have low density, high strength, and electrical conductivity

Competition and cooperation of sulfate reducing bacteria and five other bacteria during oil production

Embargo until March 18, 2023Effective control of sulfate-reducing bacteria (SRB) will help reduce economic losses and prevent threats to human health during the oil production. In this study, the responses of SRB to environmental variables and some functional microorganisms (including denitrifying bacteria (DNB), methanogenic bacteria (MGB), saprophytic bacteria (SPB), zymophyte bacteria (ZPB), and iron bacteria (IB)), during oil production processes were investigated to improve our understanding of how to control SRB abundance. Correlation analyses demonstrated that nitrate and redox potential exihibited significant inhibitory effects on the growth and reproduction of SRB and redox potential (0.175, P < 0.01) had a stronger effect than NO3− (0.0817, P < 0.05). PCA analysis demonstrated a clear division of the bacteria into two clusters, cluster 1 consisted of SRB, SPB and IB, while cluster 2 consisted of DNB, MGB and ZPB. Cooperation was apparent for SRB with SPB and IB, while competition was apparent for SRB with DNB, MGB and ZPB. These results provide new insights to possible solutions to control SRB growth in the oilfield environment, including addition of nitrate and nitrite, to promote the growth of denitrifying bacteria, thereby suppressing the growth of SRB.acceptedVersio

Construction of EMT related prognostic signature for kidney renal clear cell carcinoma, through integrating bulk and single-cell gene expression profiles

Introduction: Kidney renal clear cell carcinoma (KIRC), as a main type of malignant kidney cancers, has a poor prognosis. Epithelial-mesenchymal transformation (EMT) exerts indispensable role in tumor progression and metastasis, including in KIRC. This study aimed to mine more EMT related details and build prognostic signature for KIRC.Methods: The KIRC scRNA-seq data and bulk data were downloaded from GEO and TCGA databases, respectively. The cell composition in KIRC was calculated using CIBERSORT. Univariate Cox regression analysis and LASSO Cox regression analysis were combined to determine the prognostic genes. Gene set variation analysis and cell-cell communication analysis were conducted to obtain more functional information. Additionally, functional analyses were conducted to determine the biological roles of si-LGALS1 in vitro.Results: We totally identified 2,249 significant differentially expressed genes (DEGs) in KIRC samples, meanwhile a significant distinct expression pattern was found in KIRC, involving Epithelial Mesenchymal Transition pathway. Among all cell types, significantly higher proportion of epithelial cells were observed in KIRC, and 289 DEGs were identified in epithelial cells. After cross analysis of all DEGs and 970 EMT related genes, SPARC, TMSB10, LGALS1, and VEGFA were optimal to build prognostic model. Our EMT related showed good predictive performance in KIRC. Remarkably, si-LGALS1 could inhibit migration and invasion ability of KIRC cells, which might be involved in suppressing EMT process.Conclusion: A novel powerful EMT related prognostic signature was built for KIRC patients, based on SPARC, TMSB10, LGALS1, and VEGFA. Of which, si-LGALS1 could inhibit migration and invasion ability of KIRC cells, which might be involved in suppressing EMT process

Complete chloroplast genome sequence of Taxillus chinensis (Loranthaceae): a hemiparasitic shrub in South China

Taxillus chinensis (DC) Danser, which is a hemiparasitic shrub distributed in southern China and Southeast Asian countries, is wildly used in various traditional Chinese medicine prescriptions. In this study, the complete chloroplast genome of the T. chinensis was assembled from the whole genome Illumina sequencing data. The complete plastome is a typical quadripartite structure with a length of 121,305 bp, which contained two inverted repeats (IRs) of 22,460 bp separated by a large single-copy (LSC) and a small single copy (SSC) of 70,295 bp and 6090 bp, respectively. The plastome contains 106 genes, comprising 66 protein-coding genes, 28 tRNA genes, eight rRNA genes, and four processed pseudogenes. The overall GC content of the plastome is 37.4%, which is unevenly distributed across the whole chloroplast genome. The phylogenetic analysis shows that T. chinensis was closely related to the congeneric species T. sutchuenensis

The complete chloroplast genome sequence of Scurrula parasitica (Loranthaceae)

Scurrula parasitica Linn. is a hemiparasitic shrub distributed in southern China and Southeast Asian countries. Here, we report and characterize the complete plastid genome sequence of S. parasitica in an effort to provide genomic resources useful for the phylogenetic studies for Santalales. The complete chloroplast genome of S. parasitica was 122,599 bp in total sequence length, which containing two inverted repeats (IRs) of 23,137 bp separated by a large single-copy (LSC) and a small single copy (SSC) of 70,237 bp and 6,088 bp, respectively. The cpDNA contains 105 genes, comprising 67 protein-coding genes, 30 tRNA genes, 8 rRNA genes. The overall GC content of the plastome is 37.2%. Phylogenetic analysis with 17 species revealed that S. parasitica was closely related to the congeneric species S. notothixoides

The complete chloroplast genome sequence of Helixanthera parasitica (Loranthaceae)

The complete chloroplast genome of Helixanthera parasitica from China was analyzed using next-generation sequencing. The plastome of H. parasitica is a typical quadripartite structure with a length of 125,021 bp, which contained inverted repeats (IR) of 22,752 bp separated by a large single-copy (LSC) and a small single copy (SSC) of 73,151 bp and 6,366 bp, respectively. The cpDNA contains 105 genes, comprising 67 protein-coding genes, 30 tRNA genes, and 8 rRNA genes. The overall GC content of the plastome is 36.5%. Phylogenetic analysis showed that H. parasitica was closely related to the Tolypanthus maclurei

How Does Energy Consumption and Economic Development Affect Carbon Emissions? A Multi-Process Decomposition Framework

Against the background that climate warming has become a global challenge, exploring the factors that drive carbon emissions change is important to achieve emission reduction targets. Because of the differences in economic development, resource endowment, and historical accumulation, different countries generally have significant technological heterogeneity in the carbon generation process. Therefore, the heterogeneity-related factors should also be understood, which can help policy making and responsibility attribution more accurate. As such, this study developed a meta-frontier-based production–theoretical decomposition analysis method to track the progress of carbon emission change in 42 countries during 2012–2019 with production heterogeneity between the countries taken into account. The empirical study draws the following three meaningful conclusions: firstly, the carbon emission process of different countries has clear technological heterogeneity, mainly reflected in aspects of their energy-use efficiency and energy-use technology. Secondly, the decomposition analysis results showed that the potential energy intensity effect and the economic activity effect played the dominant role in driving and reducing carbon emissions, respectively. Additionally, this conclusion is right for all types of countries. Thirdly, the attribution analysis showed that different types of countries have significantly different contributions to the influencing factors of carbon emission changes, among which countries with large energy consumption and large economies need to take more responsibility for emission reduction

Complete chloroplast genome sequence of Heteroplexis sericophylla (Asteraceae), a rare and vulnerable species endemic to China

Heteroplexis sericophylla (Asteraceae) is a rare and vulnerable species endemic to China. Here, we report and characterize the complete chloroplast genome sequence of H. sericophylla based on Illumina paired-end sequencing data. The complete plastid genome was 152,629 bp in length, which contained two inverted repeats (IRs) of 24,954 bp separated by a large single-copy (LSC) and a small single-copy (SSC) of 84,427 bp and 18,294 bp, respectively. The cpDNA contains 131 genes, comprising 85 protein-coding genes, 37 tRNA genes, 8 rRNA genes and one processed pseudogene. The overall GC content of the plastome is 37.3%. The phylogenetic analysis of 17 selected chloroplast genomes demonstrated that H. sericophylla was close to congeneric species H. incana

Complete chloroplast genome of Toona sinensis (Meliaceae), a goluptious ‘tree vegetables’

Toona sinensis, also known as Xiangchun in Chinese, is a popular ‘tree vegetables’ and famous medicinal plant with good economic value. In our study, we sequenced the complete chloroplast (cp) genome of T. sinensis using the llumina sequencing platform. The cp genome of T. sinensis is a characteristic four-party structure with a length of 157,228 bp, which contains two 26,994 bp inverted repeats (IRs), an 85,971 bp large single copy (LSC), and a 17,269 bp small single copy (SSC). We identified a total of 126 genes, of which clouding 82 protein-coding genes, 36 tRNA genes, and eight rRNA genes. The phylogenetic analysis showed that T. sinensis was closely related to the congeneric T. ciliata