An advanced TSMK-FVC approach combined with Landsat 5/8 imagery for assessing the long-term effects of terrain and climate on vegetation growth.

Introduction: As an exceptional geographical entity, the vegetation of the Qinghai-Tibetan Plateau (QTP) exhibits high sensitivity to climate change. The Baima Snow Mountain National Nature Reserve (BNNR) is located in the south-eastern sector of the QTP, serving as a transition area from sub-tropical evergreen broadleaf forest to high-mountain vegetation. However, there has been limited exploration into predicting the temporal and spatial variability of vegetation cover using anti-interference methods to address outliers in long-term historical data.

Comparison of the effect of ultrasounic-harmonic scalpel and electrocautery in the treatment of axillary lymph nodes during radical surgery for breast cancer.

Objective: To compare the efficacy of ultrasounic-harmonic scalpel and electrocautery in the treatment of axillary lymph nodes during radical surgery for breast cancer.

Methods: A prospective study was conducted in the Department of Breast Surgery, Zhongda Hospital Affiliated to Southeast University. A total of 128 patients with pathologically confirmed breast cancer who were treated by the same surgeon from July 2023 to November 2023 were included in the analysis.

[Clinical effect of Kirschner wire intramedullary fixation in the treatment of pediatric both-bone forearm fractures at high altitude area].

Objective: To explore the clinical effect of Kirschner wire intramedullary fixation in the treatment of both-bone forearm fractures in children of high altitude area.

Methods: From August 2020 to December 2021, 19 children were treated with Kirschner wire intramedullary fixation including 11 males and 8 females, aged from 4 to 13 years old with an average of (8.16±2.

Direct observation of highly effective hydrogen isotope separation at active metal sites by DRIFT spectroscopy.

diffuse reflectance infrared Fourier transform (DRIFT) spectroscopy was developed for the first time to observe the hydrogen isotope separation behavior at active Cu sites within Cu-MFU-4, and clear evidence of the preferential adsorption of D over H was directly captured. More importantly, our results show direct spectral proof to clarify the chemical affinity quantum sieving mechanism of hydrogen isotope separation within porous adsorbents.

[Intra-annual radial growth of and and its responses to environmental factors in the Baima Snow Mountain, Northwest Yunnan, China].

Using high-resolution dendrometers, we monitored the intra-annual stem radial variations of and in the subalpine coniferous forest in Baima Snow Mountain, Northwest Yunnan Province. The seasonal dynamics of stem radial growth of both species and their responses to environmental factors were analyzed. The results showed that the stem radial growth of and mainly occurred during April to August, with the maximum growth rate in June.

Loss of exosomal miR-34c-5p in cancer-associated fibroblast for the maintenance of stem-like phenotypes of laryngeal cancer cells.

Background: Cancer-associated fibroblasts (CAFs) reconstitute cancer stemness. This study aims to investigate whether the loss of CAF-derived exosomal miR-34c-5p contributes to the maintenance of stem-like properties of laryngeal squamous cell carcinoma (LSCC).

Methods: Exosomes from primarily cultured CAFs and paired normal fibroblasts (NFs) were collected and identified.

Hemorrhage Risk Profiles among Different Antithrombotic Regimens: Evidence from a Real-World Analysis of Postmarketing Surveillance Data.

Background: Although the use of direct oral anticoagulants (DOACs) has been reported in patients with atrial fibrillation (AF), there is currently no consensus on the occurrence or characteristics of the hemorrhage risk in different antithrombotic regimens.

Methods: Disproportionality and Bayesian analyses were performed in mining data of suspected hemorrhagic events after antithrombotic drug use from the FDA Adverse Event Reporting System (FAERS) from January 2004 to September 2019. The time to onset and fatality rate of hemorrhage following different antithrombotic regimens were also compared.

[Value of sTREM-1 in serum and bronchoalveolar lavage fluid, APACHE II score, and SOFA score in evaluating the conditions and prognosis of children with severe pneumonia].

Objective: To study the significance of the level of soluble triggering receptor expressed on myeloid cells-1 (sTREM-1) in serum and bronchoalveolar lavage fluid (BALF), Acute Physiology and Chronic Health Evaluation II (APACHE II) score, and Sequential Organ Failure Assessment (SOFA) score in evaluating the conditions and prognosis of children with severe pneumonia.

Methods: A total of 76 children with severe pneumonia who were admitted from August 2017 to October 2019 were enrolled as the severe pneumonia group. According to the treatment outcome, they were divided into a non-response group with 34 children and a response group with 42 children.

Effect of doping Ti on the vacancy trapping mechanism for helium in ZrCo from first principles.

The interactions of dopants with point defects such as that between vacancies and helium can affect helium evolution and ultimately the macroscopic properties of materials. Herein, the microscopic vacancy trapping mechanism for He defects and the formation of small HeVac (consisting of m He atoms and n vacancies) clusters in pure and Ti-doped ZrCo systems are investigated by carrying out an extensive set of first-principles calculations based on density functional theory. Our results uncover the following: the helium atom can segregate from the adjacent interstitial (tetrahedral and octahedral) sites towards the vacancy center spontaneously, and therefore, a single He atom is energetically favorable to occupy a vacancy whether in the pure or in the doped system.

Complete mitochondrial genome of , with phylogenetic implication.

The Tibetan gazelle is endemic to the Tibetan plateau. The species is listed as a Near Threatened (NT) species by the IUCN Red List of Threatened Animals and the Red List of China's Vertebrates. In this study, we sequenced the complete mitochondrial genome of and examined its phylogenetic position with other nine species in Artiodactyla.

Influence of Ti on the dissolution and migration of He in ZrCo based on first principles investigation.

We have performed state-of-the-art ab initio calculations based on density functional theory to study the effect of Ti on helium dissolution and migration in a dilute Ti-doped ZrCo system. The formation energy of He-related defects predicts that it is preferable to occupy the VZr (Zr vacancy) at first. As for the Heint (interstitial site He), the results corroborate that Hetet (tetrahedral site He) is more stable than Heoct (octahedral site He) by 0.

The performance of adsorption, dissociation and diffusion mechanism of hydrogen on the Ti-doped ZrCo(110) surface.

Compared with pristine ZrCo(110), the adsorption, dissociation, and successive diffusion of hydrogen on the Ti-decorated ZrCo(110) have been investigated based on first-principles calculation. For the purpose of having fast absorption kinetics, both activation processes need to overcome small energy barriers. The adsorption energies of molecular as well as atomic hydrogen on the Ti-decorated ZrCo(110) surface were calculated using first-principles calculations with the periodic density functional theory (DFT).

Effect of external static electric fields on the dynamic heterogeneity of ionic liquids.

Ionic liquids (ILs) exhibit behavior analogous to supercooled liquids at room or even higher temperatures. ILs usually work under an externally applied static electric field (E). In this work, molecular dynamics simulations were performed with 1-ethyl-3-methyl-imidazolium tetrafluorborate ([EMI][BF]) under E, with the aim of discovering the influence of E on the dynamic heterogeneity of ILs.

Three-way DNA junction based platform for ultra-sensitive fluorometric detection of multiple metal ions as exemplified for Cu(II), Mg(II) and Pb(II).

A DNA-based fluorometric method is described for simultaneous determination of multiple metal ions. It is based on recycling cleavage of hairpins by using a three-way DNA junction structure. Three DNA sequences containing a binding region and an enzyme-strand (E-DNA) region are hybridized to form a three-way DNA junction.

Synthesis and crystal structure of deca-carbon-yl(μ-3,7-di-thia-nonane-1,9-di-thiol-ato)bis-(μ-propane-1,3-di-thiol-ato)nickel(II)tetra-iron(II) di-chloro-methane disolvate.

The title compound,, [FeNi(CHS)(CHS)(CO)]·2CHCl, is reported as a biomimic model for the active site of [FeFe]-hydrogenases. Bis(2-mercaptoeth-yl)-1,3-propane-dithio ether nickel(II) was firstly introduced into [Fe(CHS)(CO)] as an S-containing ligand. It coordinates with two [Fe(CHS)(CO)] groups, and a five-metal core complex is formed.

Structural and Kinetic Hydrogen Sorption Properties of ZrTiCo Alloy Prepared by Ball Milling.

The effects of ball milling on the hydrogen sorption kinetics and microstructure of ZrTiCo have been systematically studied. Kinetic measurements show that the hydrogenation rate and amount of ZrTiCo decrease with increasing the ball milling time. However, the dehydrogenation rate accelerates as the ball milling time increases.

Influence of macroscopic defects on the corrosion behavior of U-0.79 wt%Ti alloy in sodium chloride solution.

Uranium alloys containing a low concentration of titanium have received wide attention due to their greatly enhanced corrosion resistance and outstanding mechanical performances. Herein, we investigated the effect of macroscopic defects on the corrosion behavior of U-0.79 wt%Ti (denoted as U-Ti) alloy in 0.

Crystal structure and electrochemical properties of [Ni(bztmpen)(CHCN)](BF) {bztmpen is -benzyl-,','-tris-[(6-methyl-pyridin-2-yl)meth-yl]ethane-1,2-di-amine}.

The mononuclear nickel title complex (acetonitrile-κ){-benzyl-,','-tris-[(6-methyl-pyridin-2-yl)meth-yl]ethane-1,2-di-amine}-nickel(II) bis-(tetra-fluor-ido-borate), [Ni(CHN)(CHCN)](BF), was prepared from the reaction of Ni(BF)·6HO with -benzyl-,','-tris-[(6-methyl-pyridin-2-yl)meth-yl]ethane-1,2-di-amine () in aceto-nitrile at room temperature. With an open site occupied by the aceto-nitrile mol-ecule, the nickel(II) atom is chelated by five N-atom sites from the ligand and one N atom from the ligand, showing an overall octa-hedral coordination environment. Compared with analogues where the 6-methyl substituent is absent, the bond length around the Ni cation are evidently longer.

Crystal structure of [Cu(tmpen)](BF) {tmpen is ,,','-tetra-kis-[(6-methyl-pyridin-2-yl)meth-yl]ethane-1,2-di-amine}.

The mononuclear copper title complex {,,','-tetra-kis-[(6-methyl-pyridin-2-yl)meth-yl]ethane-1,2-di-amine-κ}copper(II) bis-(tetra-fluorido-borate), [Cu(CHN)](BF), is conveniently prepared from the reaction of Cu(BF)·6HO with ,,','-tetra-kis-[(6-methyl-pyridin-2-yl)meth-yl]ethane-1,2-di-amine (tmpen) in aceto-nitrile at room temperature in air. The complex shows a distorted octa-hedral environment around the Cu cation (site symmetry 2) and adopts the centrosymmetric space group 2/. The presence of the 6-methyl substituent hinders the approach of the pyridine group to the Cu core.

[Degradation of quinclorac by corncob, bamboo charcoal, canola meal adsorption-sodium alginate immobilized Pseudomonas stutzeri PFS-4].

To enhance the degradation of quinclorac in soil and water, corncob, bamboo charcoal, canola meal and sodium alginate were used as complex carriers to immobilize previously isolated bacterial strain Pseudomonas stutzeri PFS-4. Orthogonal experiment was conducted to optimize immobilization condition, and the degradation efficiency of quinclorac by immobilized bacteria and free bacteria in water and soil were further investigated. The results indicated that the optimal conditions for immobilization were: alginate concentration 4%, proportion of adsorption carrier (corncob: bamboo charcoal: canola meal=1:2:1), calcium chloride 3%, crosslinking time 4 h.

[Epidemiological Survey on Intestinal Parasitic Infections in Lhasa City in 2014].

Objective: To investigate the prevalence of parasitic infections in Lhasa, Tibet.

Methods: The residents in Chengguan District, Dangxiong County, Dazi County and Qushui County were selected to participate in the study in 2014, using the stratified random sampling method. Infections with the soil-borne nematodes in feces were examined in triplicates using the Kato-Katz method.

Enzyme-free and label-free ultra-sensitive colorimetric detection of Pb(2+) using molecular beacon and DNAzyme based amplification strategy.

An enzyme-free and label-free colorimetric Pb(2+) sensor based on DNAzyme and molecular beacon (MB) has been developed and demonstrated by recycle using enzyme strand for signal amplification. The substrate strand DNA (S-DNA) of DNAzyme could be converted into MB structure with base pairs of stem part at the both ends. The MB could hybridize with enzyme strand DNA (E-DNA) to form DNAzyme, and be activated and cleaved in the presence of Pb(2+).

Ultrasensitive visual detection of DNA with tunable dynamic range by using unmodified gold nanoparticles and target catalyzed hairpin assembly amplification.

A simple and novel strategy for enzyme-free ultrasensitive DNA detection platform has been present here based on gold nanoparticles (AuNPs) colorimetry and target catalyzed hairpin assembly amplification. Three hairpin auxiliary probes (H1, H2, and H3) are designed with signal-stranded DNA (ssDNA) sticky ends which could effectively stabilize AuNPs against salt-induced aggregation. However, a cascade of assembly steps with H1, H2, and H3 are activated in the presence of the target DNA, followed by a disassembly step in which H3 displaces the target DNA from the complex, freeing the target DNA to catalyze the self-assembly of additional branched junctions.

Separation and characterization of the active species in Ti-doped NaAlH4.

The catalytic mechanism of doped complex hydrides for hydrogen storage remains unconfirmed. Here, we report a simple method to separate the active species of Ti-based catalysts in NaAlH(4) by filtration using tetrahydrofuran (THF) as solvent. The results show that the average particle size of the obtained Al-Ti active species is 30-50 nm.