Microorganisms Enhance Denitrification of Low Carbon-to-Nitrogen Ratio Municipal Wastewater and Reduce NO Emission: Metabolites Promote Carbon Flux to Nitrate Bioreduction.

Denitrifying carbon source is mainly used for microbial growth and proliferation, substrate transport, and nitrate bioreduction. This paper reported a new approach to dramatically promote denitrification and reduce NO emission of low carbon-to-nitrogen ratio (C/N) municipal wastewater by introducing two microorganisms to increase carbon flux to nitrate bioreduction without increasing the external carbon source. At a C/N of 3, the total nitrogen removal efficiency of the model denitrifier () was increased from 48.

 (Boletaceae, Boletales), a new genus for .

Bolete specimens collected in Baima Snow Mountain Nature Reserve, Yunnan Province, were identified as , based on morphological and phylogenetic analyses. The ITS sequences of our collections exhibited a high similarity with (99.53% for KEF13271 and 99.

Stepwise Structural Transformations of Coordination Polymers Caused by Ligands Replacements and Solid-State Photoreaction.

The structural transformations of coordination polymers not only contribute to structural diversity but also provide design strategies at the molecular level for developing a new generation of smart materials. In this work, a photoinert olefin-containing coordination chain {[Zn(HO)(5-NO-1,3-BDC)(3,3'-dpe)]·HO} () was prepared by the hydrothermal reaction between Zn(NO)·6HO, 1,2-di(pyridin-3-yl)ethene (3,3'-dpe), and 5-nitro-1,3-benzenedicarboxylic acid (5-NO-1,3-HBDC). After replacing the 5-NO-1,3-HBDC ligand in the solution of with 5-methyl-1,3-benzenedicarboxylic acid (5-Me-1,3-HBDC), a unique two-dimensional photoreactive coordination network [Zn(5-Me-1,3-BDC)(3,3'-dpe)] () was formed.

Topological structural diversification of zinc coordination polymers caused by the spacers of different dicarboxylates.

As a new generation of multi-functional materials, crystalline coordination polymers have attracted widespread attention due to their fascinating framework structures, interesting topologies and potential applications. Two new coordination polymers, namely, poly[[μ-trans-1,2-bis(pyridin-3-yl)ethylene-κN:N']bis(μ-terephthalato-κO:O':O'')dizinc(II)], [Zn(CHO)(CHN)] or [Zn(tp)(3,3'-dpe)], (I), and poly[diaqua[μ-trans-1,2-bis(pyridin-3-yl)-ethylene-κN:N']bis(μ-furan-2,5-dicarboxylate-κO:O')dizinc(II)], [Zn(CHO)(CHN)(HO)] or [Zn(fdc)(3,3'-dpe)(HO)], (II), have been prepared by the hydrothermal reactions between Zn(NO)·6HO and trans-1,2-bis(pyridin-3-yl)ethylene (3,3'-dpe) with two similar dicarboxylic acids, i.e.

Fused exosomal targeted therapy in periprosthetic osteolysis through regulation of bone metabolic homeostasis.

The onset of periprosthetic osteolysis is mediated by wear particles following artificial arthroplasty. This manifests as a disturbed bone metabolism microenvironment, characterized by insufficient osteogenesis and angiogenesis, and enhanced osteoclastic activity. To target and remodel the homeostatic environment of bone metabolism in the sterile region around the prosthesis, we successfully pioneered the proposal and construction of a fused exosome (f-exo) system with M2 macrophage-derived exosomes (M2-exo) and urine-derived stem cell exosomes (USC-exo).

Terahertz Reconfigurable Planar Graphene Hybrid Yagi-Uda Antenna.

In this paper, we design a frequency reconfigurable antenna for terahertz communication. The antenna is based on a Yagi design, with the main radiating elements being a pair of dipole antennas printed on the top and bottom of a dielectric substrate, respectively. The director and reflector elements give the antenna end-fire characteristics.

M2 macrophages-derived exosomes for osteonecrosis of femoral head treatment: modulating neutrophil extracellular traps formation and endothelial phenotype transition.

Exosomes have shown good potential in ischemic injury disease treatments. However, evidence about their effect and molecular mechanisms in osteonecrosis of femoral head (ONFH) treatment is still limited. Here, we revealed the cell biology characters of ONFH osteonecrosis area bone tissue in single cell scale and thus identified a novel ONFH treatment approach based on M2 macrophages-derived exosomes (M2-Exos).

Exosomes Derived from Bone Marrow Mesenchymal Stem Cells Encapsulated in M2 Macrophage Cell Membrane Targeted to Inhibit Joint Periprosthetic Inflammation.

Periprosthetic osteolysis (PPOL) is a serious complication following total joint replacement surgery, and exploring treatments for this complication is of significant societal importance. Exosomes derived from bone marrow mesenchymal stem cells (BMSC-Exos, Exos) have diverse cellular functions, such as inhibiting osteoclast formation, suppressing inflammation progression, and promoting M2 macrophage polarization. However, standalone Exosomes are easily recognized and phagocytosed by the immune system, have a short half-life, and lack specificity.

sp. nov., A Newly Discovered Species in Genus of Zhejiang Province, China.

A morphological and phylogenetic analysis has been conducted on a new species, , belonging to the genus Pouzar (nrLSU + ) and provided a detailed description. It grows on the ground under the mixed forest of Fagaceae and Pinaceae in Zhejiang Province, and is named after its similarity to . The distinctive features of this species include a pileus uncracked in maturity, with a subtomentose surface, which darkens to reddish brown to blackish brown when injured.

Research Progress on Laser-Assisted Precision Machining Technology.

As a revolutionary advanced manufacturing technology, the core of laser-assisted machining technology lies in the innovation of traditional machining technology. It uses a laser to precisely modify the surface of the workpiece material through clever integration. This process can lead to significant changes in the microstructure, thermodynamic properties, and physical properties of the workpiece's cutting layer, greatly facilitating the removal of material by the cutting tool.

Perceived peer relationships and achievement motivation: Subject-specific dynamics in a Chinese high school learning context.

Aim: This study employed a three-wave random intercept cross-lagged panel model (RI-CLPM) to investigate whether a reciprocal relationship exists between perceived peer relationships (intimacy and conflict) and achievement motivation in math and English in the Chinese context.

Samples: A total of 4040 high school students were tracked with their perceived intimacy and conflict with peers and achievement motivation levels in math and English over three academic years since Grade 10.

Results: A reciprocal association was found between perceived peer intimacy and achievement motivation in English, and the predictive effect of intimacy on achievement motivation in English was the same as the reverse association.

Screening of COPD patients using the COPD diagnostic questionnaire and a portable spirometer in primary healthcare institutions: a cross-sectional, diagnostic study.

Background: Portable spirometers and chronic obstructive pulmonary disease (COPD) diagnostic questionnaires are commonly used for screening patients with COPD in primary healthcare institutions, but their accuracy is often inadequate. This study aimed to explore the accuracy of combining these two tools in screening for COPD.

Methods: Participants aged ≥ 40 years were recruited from primary healthcare institutions between July 2022 and July 2023.

Fused extracellular vesicles from M macrophages and human umbilical cord mesenchymal stem cells for the targeted regulation of macrophage pyroptosis in periprosthetic osteolysis.

The development of strategies for the prevention and treatment of aseptic loosening of prostheses stands as a critical area of global research interest. The pyroptosis of local macrophages triggered by wear particles plays a pivotal role in the onset of periprosthetic osteolysis and subsequent loosening. Extracellular vesicles, carrying the surface components and regulatory molecules of their parent cells, embody the cellular characteristics and biological functions of these progenitors.

Research Progress on Precision Tool Alignment Technology in Machining.

In the field of numerical control machining, tool alignment technology is a key link to ensure machining accuracy and quality. Tool alignment refers to determining the correct position of the tool relative to the workpiece, and its accuracy directly affects the precision of part machining. With the development of precision machining technology, the research and application of cutting technology are increasingly valued.

NO recovery from wastewater and flue gas via microbial denitrification: Processes and mechanisms.

Nitrous oxide (NO) is increasingly regarded as a significant greenhouse gas implicated in global warming and the depletion of the ozone layer, yet it is also recognized as a valuable resource. This paper comprehensively reviews innovative microbial denitrification techniques for recovering NO from nitrogenous wastewater and flue gas. Critical analysis is carried out on cutting-edge processes such as the coupled aerobic-anoxic nitrous decomposition operation (CANDO) process, semi-artificial photosynthesis, and the selective utilization of microbial strains, as well as flue gas absorption coupled with heterotrophic/autotrophic denitrification.

A reciprocal association between interpersonal relationship quality and student's positive affect: A three-wave random intercept cross-lagged study in a Chinese primary mathematics learning context.

Aim: This study adopted a three-wave random intercept cross-lagged panel model to explore the longitudinal reciprocal relationships between (a) the teacher-student relationship (TSR) quality and (b) the parent-child relationship (PCR) quality and positive affect among Chinese primary school students.

Samples: Two primary school student samples, including 3505 and 2505 students, were tracked with their perceived relationship quality with math teachers and parents and their positive affect levels in mathematics learning over three academic years.

Results: The results demonstrated that more closeness with parents could significantly predict students' subsequent higher level of positive affect in mathematics learning.

Groundwater chemical characteristic analysis and water source identification model study in Gubei coal mine, Northern Anhui Province, China.

This study aims to accurately identify mine water sources and reduce the hazards caused by water inrush accidents in coal mines. Taking the Gubei coal mine as an example, the water quality results of the water samples from the Cenozoic unconsolidated aquifer, Permian sandstone fracture aquifer, and Carboniferous Taiyuan Formation limestone karst fracture aquifer in the mine area were tested, and K+Na, Ca, Mg, Cl, SO, HCO, TDS (Total Dissolved Solids), and pH were selected as the main indicators to study the water chemistry characteristics of the aquifer through water chemistry component analysis, major ion content analysis, Piper trilinear analysis, and correlation analysis. Thirty-five groups of water samples were randomly selected and imported into SPSS software for factor analysis (FA) and downsized to three main factors as the input variables of the artificial neural network model.

Risk assessment of nitrate groundwater contamination using GIS-based machine learning methods: A case study in the northern Anhui plain, China.

Long-term agricultural activities have affected the sustainable development of groundwater in the Northern Anhui Plain, East China. It is, therefore, important to identify areas at high groundwater pollution risk in the Northern Anhui Plain to ensure effective protection of regional water resources. In this study, 60 groundwater samples were collected from the shallow aquifer of the plain and analyzed for nitrate (NO) concentrations.

Supramolecular chitin-based hydrogels with self-adapting and fast-degradation properties for enhancing wound healing.

Due to the features of high porosity, high water content, and tunable viscoelasticity, hydrogels have attracted numerous attentions in the promotion of wound closure. However, the lack of abilities to adapt the wounds of complex shapes and prevent postoperative adhesion limits their therapeutic outcomes in wound healing. To address the above challenges, the supramolecular chitin-based (SMCT) hydrogels are created via the host-guest pre-assembly strategy of β-cyclodextrin (βCD) and adamantane (Ad).

Groundwater pollution source identification and health risk assessment in the North Anhui Plain, eastern China: Insights from positive matrix factorization and Monte Carlo simulation.

Groundwater contaminants from natural and anthropogenic sources pose a serious threat to the ecological environment and public health. In this study, 30 groundwater samples were collected from shallow wells at a large central water source in the North Anhui Plain, eastern China. Hydrogeochemical methods, positive matrix factorization (PMF) model, and Monte Carlo simulation were used to determine the characteristics, sources, and human health risks of inorganic and organic analytes in groundwater.

Oxoammonium salt-promoted diverse functionalization of saturated cyclic amines with dinucleophiles.

Oxoammonium salt-promoted diverse functionalization of saturated cyclic amines with different dinucleophiles under mild conditions is presented. Specifically, when thiocyanate is used as a 1,3-dinucleophile, hexahydrothiazolo[4,5-]pyridin-2(3)-one derivatives are formed the formation of the β-TEMPO-tethered cyclic iminium ion as a key intermediate. By contrast, when benzene-1,2-diamine is used as a 1,4-dinucleophile, 2-alkylquinoxaline derivatives are afforded generation of the β-oxo cyclic iminium ion as a key intermediate.