29 research outputs found

    Table_1_Comprehensive evaluation of the resistance to shoot shriveling before and after sprouting in different varieties of Ping’ou hybrid hazelnut.XLSX

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    IntroductionThe hybrid hazelnut is an important fruit tree species known for its high productivity and disease resistance. However, during the growth process of hybrid hazelnuts, issues such as branch withering and bud wrinkling have attracted significant attention. These phenomena severely impact the normal development and yield of the plants. This study aimed to investigate the relationship between the resistance to shoot emergence and physiological changes in six hazel tree varieties by comprehensively analyzing their resistance to shoot emergence.MethodSix widely cultivated hazelnut hybrid varieties were selected for physiological measurements and field surveys using one-year-old branches and buds as test materials. The resistance to shoot emergence of different hazel tree varieties was evaluated through correlation analysis, principal component analysis, and membership function evaluation.ResultsThe results showed that the length and width of hazel buds gradually increased while the thickness first increased and then decreased before and after bud burst. The carbohydrate levels of the ‘Dawei’, ‘Pingou 110’, and ‘84–237’ varieties were significantly higher than those of other varieties. The content of reducing sugars and starch in hazel buds generally increased and then decreased during the bud burst process, while α-amylase activity showed a decreasing trend followed by an increasing trend. The antioxidative enzyme activity of ‘Dawei’ was significantly higher than that of other varieties on different sampling dates. The soluble protein content, POD enzyme activity, and CAT enzyme activity of hazel buds for the six varieties gradually decreased. The moisture content of ‘Pingou 210’ shoots was significantly higher than that of other varieties during the peak emergence period. The correlation analysis results showed that the bud burst rate of hazel trees was positively correlated with the length, width, thickness, reducing sugar content, starch content, POD enzyme activity, CAT enzyme activity, and shoot moisture content, while it was negatively correlated with α-amylase activity and relative conductivity of shoots. Through a comprehensive evaluation using correlation analysis, principal component analysis, and membership function analysis, the resistance to shoot emergence of the six hazel tree varieties was ranked in the following order: ‘Dawei’, ‘Pingou 110’, ‘84–237’, ‘Pingou 210’, ‘Yuzhui’, and ‘Liaozhen 3’.DiscussionThis study fills a research gap regarding the physiological changes of hazelnuts before and after sprouting, and provides theoretical guidance for further research on the anti-withering ability of hazelnut trees.</p

    Image_1_Comprehensive evaluation of the resistance to shoot shriveling before and after sprouting in different varieties of Ping’ou hybrid hazelnut.pdf

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    IntroductionThe hybrid hazelnut is an important fruit tree species known for its high productivity and disease resistance. However, during the growth process of hybrid hazelnuts, issues such as branch withering and bud wrinkling have attracted significant attention. These phenomena severely impact the normal development and yield of the plants. This study aimed to investigate the relationship between the resistance to shoot emergence and physiological changes in six hazel tree varieties by comprehensively analyzing their resistance to shoot emergence.MethodSix widely cultivated hazelnut hybrid varieties were selected for physiological measurements and field surveys using one-year-old branches and buds as test materials. The resistance to shoot emergence of different hazel tree varieties was evaluated through correlation analysis, principal component analysis, and membership function evaluation.ResultsThe results showed that the length and width of hazel buds gradually increased while the thickness first increased and then decreased before and after bud burst. The carbohydrate levels of the ‘Dawei’, ‘Pingou 110’, and ‘84–237’ varieties were significantly higher than those of other varieties. The content of reducing sugars and starch in hazel buds generally increased and then decreased during the bud burst process, while α-amylase activity showed a decreasing trend followed by an increasing trend. The antioxidative enzyme activity of ‘Dawei’ was significantly higher than that of other varieties on different sampling dates. The soluble protein content, POD enzyme activity, and CAT enzyme activity of hazel buds for the six varieties gradually decreased. The moisture content of ‘Pingou 210’ shoots was significantly higher than that of other varieties during the peak emergence period. The correlation analysis results showed that the bud burst rate of hazel trees was positively correlated with the length, width, thickness, reducing sugar content, starch content, POD enzyme activity, CAT enzyme activity, and shoot moisture content, while it was negatively correlated with α-amylase activity and relative conductivity of shoots. Through a comprehensive evaluation using correlation analysis, principal component analysis, and membership function analysis, the resistance to shoot emergence of the six hazel tree varieties was ranked in the following order: ‘Dawei’, ‘Pingou 110’, ‘84–237’, ‘Pingou 210’, ‘Yuzhui’, and ‘Liaozhen 3’.DiscussionThis study fills a research gap regarding the physiological changes of hazelnuts before and after sprouting, and provides theoretical guidance for further research on the anti-withering ability of hazelnut trees.</p

    Tuning Li Nucleation by a Hybrid Lithiophilic Protective Layer for High-Performance Lithium Metal Batteries

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    Lithium (Li) metal has been recognized as the most promising anode material for next-generation rechargeable batteries. However, the practical application of Li anodes is hampered by the growth of Li dendrites. To address this issue, a robust and uniform Sb-based hybrid lithiophilic protective layer is designed and built by a facile in situ surface reaction approach. As evidenced theoretically and experimentally, the as-prepared hybrid protective layer provides outstanding wettability and fast charge-transfer kinetics. Moreover, the lithiophilic Sb embedded in the protective layer provides a rich site for Li nucleation, which effectively reduces the overpotential and induces uniform Li deposition. Consequently, the symmetric cell exhibits a long lifespan of over 1600 h at 1 mA cm–2 and 1 mAh cm–2 with a low voltage polarization. Furthermore, excellent cycling stability is also obtained in Li–S full cells (60% capacity retention in 800 cycles at 1 C) and Li||LFP full cells (74% capacity retention in 500 cycles at 5 C). This work proposed a facile but efficient strategy to stabilize the Li metal anode

    Data_Sheet_1_Moderate increase of precipitation stimulates CO2 production by regulating soil organic carbon in a saltmarsh.docx

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    Saltmarsh is widely recognized as a blue carbon ecosystem with great carbon storage potential. Yet soil respiration with a major contributor of atmospheric CO2 can offset its carbon sink function. Up to date, mechanisms ruling CO2 emissions from saltmarsh soil remain unclear. In particular, the effect of precipitation on soil CO2 emissions is unclear in coastal wetlands, due the lack of outdoor data in real situations. We conducted a 7-year field manipulation experiment in a saltmarsh in the Yellow River Delta, China. Soil respiration in five treatments (−60%, −40%, +0%, +40%, and + 60% of precipitation) was measured in the field. Topsoils from the last 3 years (2019–2021) were analyzed for CO2 production potential by microcosm experiments. Furthermore, quality and quantity of soil organic carbon and microbial function were tested. Results show that only the moderate precipitation rise of +40% induced a 66.2% increase of CO2 production potential for the microcosm experiments, whereas other data showed a weak impact. Consistently, soil respiration was also found to be strongest at +40%. The CO2 production potential is positively correlated with soil organic carbon, including carbon quantity and quality. But microbial diversity did not show any positive response to precipitation sizes. r-/K-strategy seemed to be a plausible explanation for biological factors. Overall, our finding reveal that a moderate precipitation increase, not decrease or a robust increase, in a saltmarsh is likely to improve soil organic carbon quality and quantity, and bacterial oligotroph:copiotroph ratio, ultimately leading to an enhanced CO2 production.</p

    A Flexible Doubly Interpenetrated Metal–Organic Framework with Breathing Behavior and Tunable Gate Opening Effect by Introducing Co<sup>2+</sup> into Zn<sub>4</sub>O Clusters

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    A Zn<sub>4</sub>O clusters based flexible doubly interpenetrated metal–organic framework [(Zn<sub>4</sub>O)<sub>2</sub>­(DCPB)<sub>6</sub>­DMF]·2DMF·8H<sub>2</sub>O (<b>JLU-Liu33</b>, H<sub>2</sub>DCPB = 1,3-di­(4-carboxyphenyl)­benzene, DMF = <i>N</i>,<i>N</i>-dimethylformamide) with <b>pcu</b> topology has been solvothermally synthesized. Because of its flexible structure, <b>JLU-Liu33</b> exhibits a breathing behavior upon N<sub>2</sub> and CO<sub>2</sub> adsorption at low temperature, and C<sub>2</sub>H<sub>6</sub> and C<sub>3</sub>H<sub>8</sub> adsorption at 273 and 298 K. Furthermore, by adopting the direct synthesis method, two isomorphic compounds<b>JLU-Liu33L</b> and <b>JLU-Liu33H</b>have been obtained by partial substituting Zn with different amounts of Co into the <b>JLU-Liu33</b> framework. The gas adsorption study of Co-doped materials reveals that the gate opening effect of <b>JLU-Liu33</b> can be modulated by introducing different contents of Co<sup>2+</sup> into Zn<sub>4</sub>O clusters. Meanwhile, with the increasing amount of Co<sup>2+</sup>, the adsorption amount and isosteric enthalpy values for CO<sub>2</sub> have been improved. It is worth mentioning that <b>JLU-Liu33H</b> exhibits commendable selectivity for CO<sub>2</sub> over CH<sub>4</sub> which may be a good candidate for industrial gas purification and air separation applications

    Two Metal–Organic Frameworks with Structural Varieties Derived from <i>cis–trans</i> Isomerism Nodes and Effective Detection of Nitroaromatic Explosives

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    Two novel porous MOFs, [Zn<sub>5</sub>(DpImDC)<sub>2</sub>(DMF)<sub>4</sub>(H<sub>2</sub>O)<sub>3</sub>]·H<sub>2</sub>O·DMF (<b>JLU-MOF48</b>, H<sub>5</sub>DpImDC = 2-(3,5-dicarboxyphenyl)-1<i>H</i>-imidazole-4,5-dicarboxylic acid) and [Co<sub>5</sub>(DpImDC)<sub>2</sub>(DMF)<sub>4</sub>(H<sub>2</sub>O)<sub>6</sub>]·DMF (<b>JLU-MOF49</b>), have been solvothermally synthesized by using a ligand consisting of a 4,5-imidazoledicarboxylic acid part and an isophthalic acid part. Two compounds have similar structures and connections, but with significant differences in symmetry (monoclinic and orthorhombic) due the <i>cis–trans</i> isomerism in a mononuclear metal node. Moreover, <b>JLU-MOF48</b> exhibits notable luminescent properties and owns outstanding performance for detecting nitroaromatic explosives, especially for 2,4,6-trinitrophenol (<i>K</i><sub>sv</sub> = 1.0 × 10<sup>5</sup> M<sup>–1</sup>)

    Two Finite Binuclear [M<sub>2</sub>(μ<sub>2</sub>‑OH)(COO)<sub>2</sub>] (M = Co, Ni) Based Highly Porous Metal–Organic Frameworks with High Performance for Gas Sorption and Separation

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    Two highly porous MOFs, [Co<sub>2</sub>(μ<sub>2</sub>-OH)­(bpdc)­(Htpim)<sub>2</sub>]­[SiF<sub>6</sub>]·3.5DMA·2.5CH<sub>3</sub>OH (<b>JLU-Liu37</b>, H<sub>2</sub>bpdc = biphenyl-4,4′-dicarboxylate, Htpim = 2,4,5-tri­(4-pyridyl)­imidazole) and [Ni<sub>2</sub>(μ<sub>2</sub>-OH)­(bpdc)­(Htpim)<sub>2</sub>]­[SiF<sub>6</sub>]·7.5DMA·6CH<sub>3</sub>OH (<b>JLU-Liu38</b>), have been solvothermally synthesized by using the mixed ligand strategy. Both of the compounds possess finite binuclear [M<sub>2</sub>(μ<sub>2</sub>-OH)­(COO)<sub>2</sub>] (M = Co, Ni) secondary building units (SBUs) which formed with a polar functional group, μ<sub>2</sub>-OH. <b>JLU-Liu37</b> and <b>JLU-Liu38</b> exhibit notable adsorption capacities for CO<sub>2</sub> and light hydrocarbons (CH<sub>4</sub>, C<sub>2</sub>H<sub>6</sub>, and C<sub>3</sub>H<sub>8</sub>). Moreover, both of the materials exhibit arrestive natural gas selective separation ability, especially for C<sub>3</sub>H<sub>8</sub>/CH<sub>4</sub> (206 for an equimolar mixture under 1 bar and 298 K, for <b>JLU-Liu37</b>). Both of the MOFs may be effectively applied in the separation of industrial light hydrocarbons

    Two Finite Binuclear [M<sub>2</sub>(μ<sub>2</sub>‑OH)(COO)<sub>2</sub>] (M = Co, Ni) Based Highly Porous Metal–Organic Frameworks with High Performance for Gas Sorption and Separation

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    Two highly porous MOFs, [Co<sub>2</sub>(μ<sub>2</sub>-OH)­(bpdc)­(Htpim)<sub>2</sub>]­[SiF<sub>6</sub>]·3.5DMA·2.5CH<sub>3</sub>OH (<b>JLU-Liu37</b>, H<sub>2</sub>bpdc = biphenyl-4,4′-dicarboxylate, Htpim = 2,4,5-tri­(4-pyridyl)­imidazole) and [Ni<sub>2</sub>(μ<sub>2</sub>-OH)­(bpdc)­(Htpim)<sub>2</sub>]­[SiF<sub>6</sub>]·7.5DMA·6CH<sub>3</sub>OH (<b>JLU-Liu38</b>), have been solvothermally synthesized by using the mixed ligand strategy. Both of the compounds possess finite binuclear [M<sub>2</sub>(μ<sub>2</sub>-OH)­(COO)<sub>2</sub>] (M = Co, Ni) secondary building units (SBUs) which formed with a polar functional group, μ<sub>2</sub>-OH. <b>JLU-Liu37</b> and <b>JLU-Liu38</b> exhibit notable adsorption capacities for CO<sub>2</sub> and light hydrocarbons (CH<sub>4</sub>, C<sub>2</sub>H<sub>6</sub>, and C<sub>3</sub>H<sub>8</sub>). Moreover, both of the materials exhibit arrestive natural gas selective separation ability, especially for C<sub>3</sub>H<sub>8</sub>/CH<sub>4</sub> (206 for an equimolar mixture under 1 bar and 298 K, for <b>JLU-Liu37</b>). Both of the MOFs may be effectively applied in the separation of industrial light hydrocarbons

    Highly Efficient Trivalent Americium/Europium Separation by Phenanthroline-Derived Bis(pyrazole) Ligands

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    The synthesis, Eu<sup>3+</sup> complexation, and solvent extraction of Am<sup>3+</sup> and Eu<sup>3+</sup> from nitric acid solutions by tetradentate phenanthroline-derived bis­(pyrazole) (BPPhen) ligands were described. By using <i>meta</i>-nitrobenzotrifluoride as diluent, BPPhen ligands in combination with 2-bromohexanoic acid extracted Am<sup>3+</sup> and Eu<sup>3+</sup> with remarkably high efficiency, excellent selectivity, and fast extraction kinetics. Stripping posed no issues. The ligands also showed excellent hydrolytic stability and acid tolerance. 2-Bromohexanoic anion neutralized the charge and increased the lipophilicity of the extracted ion pair. The extraction conformed to a cation exchange model. Slope analysis demonstrated the extraction of 1:2 metal/ligand complexes. Analyses by electrospray ionization mass spectrometry, time-resolved laser-induced fluorescence spectroscopy, Raman, and Fourier transform infrared techniques indicated that the composition of the extracted species is [Eu­(nOct-BPPhen)<sub>2</sub>­(H<sub>2</sub>O)]<sup>3+</sup>. The formation of 1:2 complexes was also confirmed by UV–vis spectroscopic titration and microcalorimetric titration methods. Meanwhile, the stability constants (<i>K</i>) and the thermodynamic parameters (Δ<i>H</i>, Δ<i>S</i>, Δ<i>G</i>) for the complexation of Eu<sup>3+</sup> with nOct-BPPhen were presented too

    CCL21/CCR7 Axis Contributed to CD133<sup>+</sup> Pancreatic Cancer Stem-Like Cell Metastasis via EMT and Erk/NF-κB Pathway

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    <div><p>Background</p><p>Tumor metastasis is driven by malignant cells and stromal cell components of the tumor microenvironment. Cancer stem cells (CSCs) are thought to be responsible for metastasis by altering the tumor microenvironment. Epithelial-mesenchymal transition (EMT) processes contribute to specific stages of the metastatic cascade, promoted by cytokines and chemokines secreted by stromal cell components in the tumor microenvironment. C-C chemokine receptor 7 (CCR7) interacts with its ligand, chemokine ligand 21(CCL21), to mediate metastasis in some cancer cells lines. This study investigated the role of CCL21/CCR7 in promoting EMT and metastasis of cluster of differentiation 133<sup>+</sup> (CD133<sup>+</sup>) pancreatic cancer stem-like cells.</p><p>Methods</p><p>Panc-1, AsPC-1, and MIA PaCa-2 pancreatic cancer cells were selected because of their aggressive invasive potentials. CCR7 expression levels were examined in total, CD133<sup>+</sup> and CD133<sup>−</sup> cell fractions by Immunofluorescence analysis and real time-quantitative polymerase chain reaction (RT-qPCR). The role of CCL21/CCR7 in mediating metastasis and survival of CD133<sup>+</sup> pancreatic cancer stem-like cells was detected by Transwell assays and flow cytometry, respectively. EMT and lymph node metastasis related markers (E-cadherin, N- cadherin, LYVE-1) were analyzed by western blot. CCR7 expression levels were analyzed by immunohistochemical staining and RT-qPCR in resected tumor tissues, metastatic lymph nodes, normal lymph nodes and adjacent normal tissues from patients with pancreatic carcinoma.</p><p>Results</p><p>CCR7 expression was significantly increased in CD133<sup>+</sup> pancreatic cancer stem-like cells, resected pancreatic cancer tissues, and metastatic lymph nodes, compared with CD133<sup>−</sup> cancer cells, adjacent normal tissues and normal lymph nodes, respectively. CCL21/CCR7 promoted metastasis and survival of CD133<sup>+</sup> pancreatic cancer stem-like cells and regulated CD133<sup>+</sup> pancreatic cancer stem-like cells metastasis by modulating EMT and Erk/NF-κB pathway.</p><p>Conclusions</p><p>These results indicate a specific role for CCL21/CCR7 in promoting EMT and metastasis in CD133<sup>+</sup> pancreatic cancer stem-like cells. Furthermore the data also indicated the potential importance of developing therapeutic strategies targeting cancer stem-like cells and CCL21/CCR7 for reducing metastasis.</p></div
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