Showing papers by "Henan University of Technology published in 2018"
TL;DR: In this paper, a magnetically recyclable immobilized lipase was developed for biodiesel production to meet the need of green and clean production, which achieved an activity recovery of 64.9% and enzyme immobilization efficiency of 85.5%.
228 citations
TL;DR: In this article, the authors summarized the application fields, main pretreatment processing methods and bio-products of wheat straw and detailed novel pretreatment methods and products during the comprehensive utilization of wheat- straw.
Abstract: To meet the demands for screening out the optimal utilization channel for biomass from wheat straw, a number of researches have been reported in the comprehensive utilization about wheat straw including cellulose, hemicellulose and lignin. By reviewing the research status, processing method and comprehensive application of wheat straw, this paper summarizes the application fields, main pretreatment processing methods and bio-products of wheat straw. The paper also detailed novel pretreatment methods and bio-products during the comprehensive utilization of wheat straw. The assessment of more effective pretreatment methods has enabled the examination of wheat straw materials’ potential in the field of lignocellulose that, today, is little exploited. Bioconversion of lignocellulose to bioproducts e.g. bioethanol, biohydrogen and bio-composites has made achievements, however, several limitations such as pretreatment methods remain to be solved.
210 citations
TL;DR: In this paper, mesoporous carbon supported nano Fe0 was prepared from polyvinyl alcohol (PVA) using MnCO3 as template, which was used as the catalyst to activate persulfate (PS) for the removal of tetracycline hydrochloride (TC) from aqueous solution.
207 citations
TL;DR: In this paper, the core-shell structured Fe3O4@HKUST-1 composites with a magnetic core and a porous metal-organic framework shell were fabricated by using a versatile Layer-by-Layer assembly method, and then basic ionic liquids were encapsulated within the core−shell magnetically responsive material, resulting in a solid hybrid base catalyst.
191 citations
TL;DR: An enantioselective protonation strategy has been successfully applied to the synthesis of chiral α-tertiary azaarenes and an application of this methodology to a two-step synthesis of the enantiomerically pure medicinal compound pheniramine is presented.
Abstract: An enantioselective protonation strategy has been successfully applied to the synthesis of chiral α-tertiary azaarenes. With a dual catalytic system involving a chiral phosphoric acid and a dicyanopyrazine-derived chromophore (DPZ) photosensitizer that is mediated by visible light, a variety of α-branched 2-vinylpyridines and 2-vinylquinolines with N-aryl glycines underwent a redox-neutral, radical conjugate addition–protonation process and provided valuable chiral 3-(2-pyridine/quinoline)-3-substituted amines in high yields with good to excellent enantioselectivities (up to >99% ee). An application of this methodology to a two-step synthesis of the enantiomerically pure medicinal compound pheniramine (Avil) is also presented.
178 citations
TL;DR: In this paper, the core-shell structured magnetic support and so-prepared solid catalyst were characterized by various techniques, and the solid catalyst exhibited a strong magnetic response and displayed extraordinary catalytic activities in the transesterification of soybean oil for the production of biodiesel, with the oil conversion reaching 99.2% by using the methanol-to-oil molar ratio of 25:1 and catalyst loading of 3'wt% at reflux of methanoline after 8'h of reaction.
161 citations
TL;DR: Results showed that the incorporation of LO provoked a decrease in water content, transparency, whiteness index (WI), water vapor permeability (WVP), solubility and tensile strength properties.
153 citations
TL;DR: A benzothiazole-based aggregation-induced emission luminogen (AIEgen) was designed and synthesized, which exhibited multifluorescence emissions in different dispersed or aggregated states based on tunable excited-state intramolecular proton transfer (ESIPT) and restricted intramolescular rotation (RIR) processes.
Abstract: In this work, a benzothiazole-based aggregation-induced emission luminogen (AIEgen) of 2-(5-(4-carboxyphenyl)-2-hydroxyphenyl)benzothiazole (3) was designed and synthesized, which exhibited multifluorescence emissions in different dispersed or aggregated states based on tunable excited-state intramolecular proton transfer (ESIPT) and restricted intramolecular rotation (RIR) processes. 3 was successfully used as a ratiometric fluorescent chemosensor for the detection of pH, which exhibited reversible acid/base-switched yellow/cyan emission transition. More importantly, the pH jump of 3 was very precipitous from 7.0 to 8.0 with a midpoint of 7.5, which was well matched with the physiological pH. This feature makes 3 very suitable for the highly sensitive detection of pH fluctuation in biosamples and neutral water samples. 3 was also successfully used as a ratiometric fluorescence chemosensor for the detection of acidic and basic organic vapors in test papers.
113 citations
TL;DR: In this article, Ni-MOF and carbon nanotubes composite is constructed via in situ self-assembly of NiMOF in the presence of functional CNTs solution and can be used as an efficient electrocatalytic oxidation material for glucose detection.
113 citations
TL;DR: It was shown that the total fatty acid (FA) compositions of the binary blends were almost unchanged after the interesterifications, whereas the FA positional distribution and triacylglycerol species were significantly varied.
111 citations
TL;DR: The methodology shows broad substrate scope, excellent functional group tolerance, high atom economy and high efficiency, thus enabling the preparation of diverse potentially valuable 3-alkyl quinoxalin-2(1H)-one derivatives.
Abstract: A convenient and efficient transition-metal-free protocol for the synthesis of 3-alkyl quinoxalin-2(1H)-ones from the radical reaction of quinoxalin-2(1H)-ones with ethers was developed with moderate to good yields. The methodology shows broad substrate scope, excellent functional group tolerance, high atom economy and high efficiency, thus enabling the preparation of diverse potentially valuable 3-alkyl quinoxalin-2(1H)-one derivatives.
TL;DR: It is shown that the switched impulsive CNs (SICNs) can be synchronized by desynchronizing impulses even though CNs without impulse are unsynchronized.
TL;DR: This elaborate work opens up an avenue toward the design of carbon with multidimensions and in‐depth understanding of their sodium‐storage features.
Abstract: Different dimensions of carbon materials with various features have captured numerous interests due to their applications on the tremendous fields. Restricted by the raw materials and devices, the controlling of their morphology is a major challenge. Utilizing the catalytic features of the intermediates from the low-cost salts and polymerization of 0D carbon quantum dots (CQDs), 0D CQDs are expected to self-assemble into 1/2/3D carbon structures with the assistance of temperature-induced intermediates (e.g., ZnO, Ni, and Cu) from the salts (ZnCl2, NiCl2, and CuCl). The formation mechanisms are illustrated as follows: 1) the "orient induction" to evoke "vine style" growth mechanism of ZnO; 2) the "dissolution-precipitation" of Ni; and 3) the "surface adsorption self-limited" of Cu. Subsequently, the degree of graphitization, interlayer distance, and special surface area are investigated in detail. 1D structure from 700 °C as anode displays a high Na-storage capacity of 301.2 mAh g-1 at 0.1 A g-1 after 200 cycles and 107 mAh g-1 at 5.0 A g-1 after 5000 cycles. Quantitative kinetics analysis confirms the fundamentals of the enhanced rate capacity and the potential region of Na-insertion/extraction. This elaborate work opens up an avenue toward the design of carbon with multidimensions and in-depth understanding of their sodium-storage features.
TL;DR: In this article, a soybean protein isolate (SPI)-chitosan edible coating was used to prolong the shelf life of apricots stored at 2'°C.
Abstract: A soybean protein isolate (SPI)-chitosan edible coating was used to prolong the shelf life of apricots stored at 2 °C. Apricots were coated with two different coating formulations (SPI and SPI combined with chitosan). The changes to several parameters including weight loss, firmness, titratable acidity, soluble solids content, pectin contents, and the nanostructural properties of pectin were investigated to evaluate the effectiveness of the coatings. The coatings, especially the SPI-chitosan coating, significantly decreased the weight loss of apricots. Meanwhile, this treatment prevented the decrease in firmness and benefited the textural properties of the tissue. The atomic force microscopy (AFM) results showed a greater Fq (the percent of pectin chains of particular width or length among all the chains observed by AFM) for the width and length of pectin molecules in the SPI-chitosan coated samples (width ≥ 61 nm; length ≥ 3 μm), which indicated that the SPI-chitosan coating could inhibit pectin degradation. The results showed that the SPI-chitosan coating is an effective method to preserve the quality of apricots.
TL;DR: A facile TBHP-mediated direct oxidative coupling of quinoxalin-2(1H)-ones with arylaldehydes has been developed under metal-free conditions and proceeded efficiently under mild conditions over a broad range of substrates and with functional group tolerance.
Abstract: A facile TBHP-mediated direct oxidative coupling of quinoxalin-2(1H)-ones with arylaldehydes has been developed under metal-free conditions. This method provided a convenient and efficient approach to various 3-acylated quinoxalin-2(1H)-ones from readily available starting materials with excellent regioselectivity. This reaction proceeded efficiently under mild conditions over a broad range of substrates and with functional group tolerance.
TL;DR: It is found that strain LM2303 had strong antagonist activity against F. graminearum and significantly reduced disease severity of FHB with the control efficiency of 72.3% under field conditions, reinforcing the higher potential of this strain as a powerful biocontrol strain agent (BCA) for FHB control.
Abstract: Fusarium head blight (FHB) mainly caused by F. graminearum, always brings serious damage to wheat production worldwide. In this study, we found that strain LM2303 had strong antagonist activity against F. graminearum and significantly reduced disease severity of FHB with the control efficiency of 72.3% under field conditions. To gain a comprehensive understanding of the biocontrol potential of strain LM2303 against FHB, an integrated approach of genome mining and chemical analysis was employed. The whole genome of strain LM2303 was obtained and analyzed, showing the largest number of genes/gene clusters associated with biocontrol functions as compared with the known biocontrol strains (FZB42, M75, CAU B946). And strain LM2303 was accurately determined as a member of the B. velezensis clade using the phylogenomic analysis of single-copy core genes. Through genome mining, 13 biosynthetic gene clusters(BGCs) encoding secondary metabolites with biocontrol functions were identified, which were further confirmed through chemical analyses such as UHPLC-ESI-MS, including three antifungal metabolites (fengycin B, iturin A, and surfactin A), eight antibacterial metabolites (surfactin A, butirosin, plantazolicin and hydrolyzed plantazolicin, kijanimicin, bacilysin, difficidin, bacillaene A and bacillaene B, 7-o-malonyl macrolactin A and 7-o-succinyl macrolactin A), the siderophore bacillibactin, molybdenum cofactor and teichuronic acid. In addition, genes/gene clusters involved in plant colonization, plant growth promotion and induced systemic resistance were also found and analyzed, along with the corresponding metabolites. Finally, four different mechanisms of strain LM2303 involved in the biocontrol of FHB were putatively obtained. This work provides better insights into a mechanistic understanding of strain LM2303 in control of FHB, reinforcing the higher potential of this strain as a powerful biocontrol strain agent (BCA) for FHB control. The results also provide scientific reference and comparison for other biocontrol strains.
TL;DR: The methodology demonstrates a broad substrate scope, excellent functional group tolerance, high atom economy and high efficiency, thus enabling the preparation of diverse potentially valuable hydroxyl-containing quinoxalin-2(1H)-ones.
Abstract: An efficient copper-catalyzed protocol for the synthesis of hydroxyl-containing quinoxalin-2(1H)-ones from the radical reaction of quinoxalin-2(1H)-ones with alcohols was developed with moderate to good yields. Quinoxalin-2(1H)-ones were coupled with alkyl radicals through direct catalytic functionalization of the α sp3 C–H bond of alcohols. The methodology demonstrates a broad substrate scope, excellent functional group tolerance, high atom economy and high efficiency, thus enabling the preparation of diverse potentially valuable hydroxyl-containing quinoxalin-2(1H)-ones.
TL;DR: This paper considers the bipartite leader-following synchronization in a signed network composed by an array of coupled delayed neural networks by utilizing the pinning control strategy and M-matrix theory, where the communication links between neighboring nodes of the network can be either positive or negative.
TL;DR: This paper considers asymptotic synchronization of drive-response memristive neural networks with bounded time-varying discrete delay and unbounded distributed delay (mixed delays), which extends existing intermittent control techniques and reveals new relationship between control width and rest width.
TL;DR: In this article, the formation of hetero-covalent linkages between sugar beet pectin (SBP) and bovine serum albumin (BSA) was confirmed by sodium dodecyl sulfate-polyacrylamide gel electrophoresis.
TL;DR: This study revealed that the application of ultrasound and calcium could preserve the quality of stored strawberries and confirmed that U + Ca treatment effectively inhibits CSP degradation.
TL;DR: A novel aspartic protease gene (RmproA) was cloned from the thermophilic fungus Rhizomucor miehei CAU432 and expressed in Pichia pastoris, which may be a potential candidate for several industrial applications.
TL;DR: A visual detection method for miRNA 155 based on DNAzyme amplification strategy in living cells based on linear range from 0.1 to 10 nM and a low detection limit of 44 pM on in vitro detection is established.
Abstract: MicroRNAs (miRNAs) play important roles in the regulation of target gene expression and cell development. Therefore, developing of accurate and visual detection methods for miRNAs is important for ...
TL;DR: In this article, the characteristics of embodied CO2 emissions from the perspective of carbon inflows, carbon outflows, and the net effects, at both an aggregate and bilateral scale, are explored.
TL;DR: An aptamer based colorimetric assay for rapid and sensitive determination of zearalenone based on the inhibition of ZEN aptamer on the the peroxidase-like activity of gold nanoparticle (AuNPs).
Abstract: An aptamer based colorimetric assay is described for the determination of zearalenone (ZEN). It is based on the inhibition of the peroxidase-mimicking activity of gold nanoparticles (AuNPs) by the ZEN aptamer. However, in the presence of ZEN, the aptamer is bound by ZEN and can no longer inhibit the peroxidase-mimicking activity of AuNPs. The color change of solution is related to ZEN concentration and observed with bare eyes. Under optimal conditions, the absorbance (at 630 nm) increases linearly in the ZEN concentration range of 10–250 ng·mL−1, and the limit of detection is 10 ng·mL−1. The specificity of the assay was verified by studying the effect of potential interferents. The recoveries from ZEN spiked corn and corn oil range from 92 to 110%, and the relative standard deviations are between 2.4 and 6.4%. The results are in good agreement with those obtained by an ELISA.
TL;DR: A typical rule-based power-following EMS and a wavelet-transform-based EMS are designed in this paper to validate the proposed EMS evaluation approach based on a fuel cell electric vehicle model and show that the introduced comprehensive evaluation framework can effectively assess different EMSs forfuel cell electric vehicles synthetically and quantitatively and provide an optimization guide.
TL;DR: KLF5 knockdown could suppress hypoxia-induced DDP resistance, and its mechanism may be due to the inhibition of HIF-1α-dependent glycolysis via inactivation of the PI3K/Akt/mTOR pathway.
Abstract: Hypoxia-mediated chemoresistance has been regarded as an important obstacle in the development of cancer treatment. Knockdown of kruppel-like factor 5 (KLF5) was reported to inhibit hypoxia-induced cell survival and promote cell apoptosis in non-small cell lung cancer (NSCLC) cells via direct regulation of hypoxia inducible factor-1α (HIF-1α) expression. However, the roles of KLF5 in the development of hypoxia-induced cisplatin (DDP) resistance and its underlying mechanism in NSCLC cells remain to be further elucidated. Western blot was performed to determine the protein levels of KLF5, P-glycoprotein (P-gp) and HIF-1α in treated NSCLC cells. Cell survival was examined by MTT assay. The effect of KLF5 knockdown on hypoxia-induced glycolysis was assessed by measuring glucose consumption and lactate production. The effect of KLF5 knockdown on the phosphoinositide 3-kinase (PI3K)/protein kinase B (Akt)/mammalian target of rapamycin (mTOR) pathway was analyzed by western blot. Hypoxia upregulated the expression of KLF5 in NSCLC cells. KLF5 knockdown suppressed hypoxia-induced DDP resistance in NSCLC cells, as demonstrated by the increased cytotoxic effects of DDP and reduced P-gp expression in NSCLC cells in hypoxia. Moreover, KLF5 knockdown inhibited hypoxia-induced HIF-1α expression and glycolysis, and KLF5 knockdown suppressed hypoxia-induced DDP resistance by inhibiting HIF-1α-dependent glycolysis in NSCLC cells. Furthermore, KLF5 knockdown suppressed hypoxia-induced activation of the PI3K/Akt/mTOR pathway in NSCLC cells and KLF5 overexpression promoted hypoxia-induced DDP resistance in NSCLC cells through activation of the PI3K/Akt/mTOR pathway. KLF5 knockdown could suppress hypoxia-induced DDP resistance, and its mechanism may be due to the inhibition of HIF-1α-dependent glycolysis via inactivation of the PI3K/Akt/mTOR pathway.
TL;DR: A novel method based on a magnetically suspended control and sensitive gyroscope (MSCSG) configuration, which entirely preserves the inertial coupling moment items and cross-coupling moment items in the resolution of attitude rate by making full use of the dynamic information of the configuration, is proposed.
Abstract: To achieve the high-accuracy and high-bandwidth attitude-rate measurement and control integration of spacecraft, a novel method based on a magnetically suspended control and sensitive gyroscope (MSCSG) configuration is proposed in this paper. MSCSGs are employed as both actuators and attitude-rate sensors. First, the structure and principle of a MSCSG is given and its modeling is established. Second, the attitude-rate measurement method based on a four-cross configuration is proposed. The corresponding attitude decoupling control law of spacecraft and the steering law of the MSCSGs have been further designed. Compared with the traditional attitude-rate measurement methods, the proposed one entirely preserves the inertial coupling moment items and cross-coupling moment items in the resolution of attitude rate by making full use of the dynamic information of the configuration. Thus, the measurement precision can be greatly improved, and the traditional tension between the accuracy and bandwidth can be well alleviated. The proposed method also enlarges greatly the attitude control bandwidth by the microgimbal moment, providing a new method for high-frequency vibration suppression. Semiphysical simulation results demonstrate the correctness and superiority of the proposed method.
TL;DR: A model was developed to describe the interaction between soy protein hydrolyzates and wheat proteins: soy protein Hydrolyzate linked with wheat proteins through disulfide bond, disrupted the glutenins polymerization, thus hindered gluten networks formation.