KOREAN JOURNAL OF CHEMICAL ENGINEERING
·
2024
·Vol. 41
·期 6
·1665-1678
·
IF 2.9
Liu Yanyan,Wang Zhiheng,Li Xin,Gao Ruiyao,Sun Jiong,Liu Jiankun,Yao Songdong
To investigate the potential utilization of MOF templates in hydrodesulfurization (HDS) of large sulfur-containing compounds, MOF-derived Ni 2 P was prepared and characterized by XRD, TG, SEM, TEM, XPS and Raman. The findings indicate that MOF-derived Ni 2 P catalyst exhibits significantly enhanced Hydrodesulfurization (HDS) activity compared to conventional unsupported Ni 2 P. A modified pyrolysis and phosphiding condition allowed the stacking of central Ni atoms to be aggregated loosely, and morphology of MOF-derived Ni 2 P can be controllably transmitted from polyhedral to petal-like. A lower pyrolysis temperature tends to reduce density of Ni aggregates and cluster size of Ni 2 P(111), thereby facilitating the phosphiding of Ni aggregates and enhancing the catalytic activity of MOF-derived Ni 2 P in HDS process. Increasing the duration time of pyrolysis at lower temperatures does not accelerate the aggregation of particles, but makes petals on surface of MOF-derived Ni become thinner and eventually disappear, until coral-like nanosphere aggregates with uniform size are formed. The gradually elimination of MOF framework renders nickel aggregates more susceptible to phosphiding. The collapse of pore structure of MOF template can impact HDS activity of MOF-derived Ni 2 P. Prolonging pyrolysis time causes the spacing between Ni 2 P clusters to diminish, thereby significantly decreasing reactivity of Ni 2 P-400-4-275 compared to Ni 2 P-400-2-275 in DBT–HDS.
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IRANIAN POLYMER JOURNAL
·
2024
·
IF 2.4
Li Manli,Zhu Shengbin,Li Xiaohong,Jin Enqi
Graft polymerization-quaternization double modification has become a new effective method for preparing antibacterial chitosan (CS) in recent years. To improve the properties of double modified CS, the effects of molecular structures of amino-containing acrylate (ACA) monomer grafted onto CS (CS- g -PACA) and a quaternary ammonium reagent used for the quaternization of CS- g -PACA have been investigated in the study. A series of ACA monomers, i.e., dimethylaminoethyl methacrylate (DMAEMA), diethylaminoethyl methacrylate (DEAEMA) and 2-( tert -butyl amino)ethyl methacrylate (TBAEMA), were firstly grafted onto the molecular chain of CS. Then, CS- g -PACA was quaternized by various quaternary ammonium reagents, i.e., three kinds of chloralkane include 1-chlorobutane, 1-chlorooctane and 1-chlorododecane. The modified CS was blended with PVA to prepare nanofiber membranes by electrospinning. The major functional properties of the nanofiber membranes, e.g., fiber morphology, thermal stability, tensile property, water stability, and inhibition of E.coli and S.aureus as representatives of gram negative and positive bacterial, were evaluated systematically. The results showed that when ACA and chloralkane were TBAEMA and 1-chlorobutane, respectively, the graft-quaternization double modified CS/PVA blend nanofiber membrane possessed a more uniform and smooth fiber structure, higher thermal stability, tensile strength, water stability, and better inhibition function to the bacteria. For instance, the diameter of the fiber could reach ~ 180 nm and tensile strength of the fiber membrane could touch the value of 20.1 MPa as well. The inhibition rate of E.coli and S.aureus was as high as 95.9% and 99.6%, respectively. Double modified CS nanofibers have shown great potential to be used as biocompatible and environment-friendly medical and hygiene textiles. Graphical abstract
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Scientific Reports
·
2024
·Vol. 14
·期 1
·1-9
·
IF 3.8
Yuan Fang-Fang,Wang Pei,Han Xiao-Jie,Qin Ting-Ting,Lu Xin,Bai Hai-Jiao
The microreactor with two types of immobilized enzymes, exhibiting excellent orthogonal performance, represents an effective approach to counteract the reduced digestion efficiency resulting from the absence of a single enzyme cleavage site, thereby impacting protein identification. In this study, we developed a hydrophilic dual-enzyme microreactor characterized by rapid mass transfer and superior enzymatic activity. Initially, we selected KIT-6 molecular sieve as the carrier for the dual-IMER due to its three-dimensional network pore structure. Modification involved co-deposition of polyethyleneimine (PEI) and acrylamide (AM) as amine donors, along with dopamine to enhance material hydrophilicity. Remaining amino and double bond functional groups facilitated stepwise immobilization of trypsin and Glu-C. Digestion times for bovine serum albumin (BSA) and bovine hemoglobin (BHb) on the dual-IMER were significantly reduced compared to solution-based digestion (1 min vs. 36 h), resulting in improved sequence coverage (91.30% vs. 82.7% for BSA; 90.24% vs. 89.20% for BHb). Additionally, the dual-IMER demonstrated excellent durability, retaining 96.08% relative activity after 29 reuse cycles. Enhanced protein digestion efficiency can be attributed to several factors: (1) KIT-6’s large specific surface area, enabling higher enzyme loading capacity; (2) Its three-dimensional network pore structure, facilitating faster mass transfer and substance diffusion; (3) Orthogonality of trypsin and Glu-C enzyme cleavage sites; (4) The spatial effect introduced by the chain structure of PEI and glutaraldehyde’s spacing arm, reducing spatial hindrance and enhancing enzyme–substrate interactions; (5) Mild and stable enzyme immobilization. The KIT-6-based dual-IMER offers a promising technical tool for protein digestion, while the PDA/PEI/AM-KIT-6 platform holds potential for immobilizing other proteins or active substances.
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Journal of Food Measurement and Characterization
·
2024
·
IF 2.9
Zhou Zhen,Liu Shengkai,Cui Liying,Liu Zhongkai,Li Xiaoyu,Liu Zhiguo,Fu Yujie
This study explored the ultrasonic-microwave synergistic extraction technique for obtaining cinnamaldehyde and cinnamic acid from cinnamon twigs, and determined the most favorable extraction conditions. The optimization of extraction parameters, including extraction time, ethanol concentration, liquid-to-solid ratio, and microwave power, was achieved through single-factor experiments and the response surface method. The results of the significance analysis indicated that ethanol concentration and extraction power were the two primary factors affecting the extraction rates of cinnamaldehyde and cinnamic acid. Under the optimal conditions—600 W microwave power, 75% ethanol concentration, a liquid-to-solid ratio of 1:15, and a 20-min extraction time——the extraction efficiency of cinnamaldehyde and cinnamic acid was significantly improved compared to traditional methods. Moreover, the use of the ultrasonic-microwave synergistic extraction technique demonstrated higher efficiency and lower environmental impact due to reduced waste production. The study also revealed that cinnamaldehyde and cinnamic acid in cinnamon twigs exhibited strong polarity characteristics and microwave absorption capacity, contributing to enhanced cell disruption and increased natural product release. These findings provide a robust basis for the development of an efficient and environmentally friendly extraction process for these valuable bioactive compounds.
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Nature Energy
·
2024
·
IF 49.7
Li Siyuan,Zhang Jiahui,Zhang Shichao,Liu Qilei,Cheng Hao,Fan Lei,Zhang Weidong,Wang Xinyang,Wu Qian,Lu Yingying
High-performance, cost-efficient electrolyte systems are sought after for high-energy-density multivalent metal batteries. However, the expensive precursor and complex synthesis process hinders exploration of cathode electrode/electrolyte interfaces and solvation structures. Here we developed a universal cation replacement method to prepare low-cost, high-reversibility magnesium and calcium electrolytes derived from a zinc organoborate solvation structure. By rationally adjusting the precursor chain length and F-substitution degree, we can fine tune anion participation in the primary solvation shell. A completely dissociated Mg organoborate electrolyte enables high current endurance and enhanced electrochemical kinetics, whereas the Ca organoborate electrolyte with strong coordination/B–H inclusion offers a stable solid–electrolyte interphase with high coulombic efficiency. A rechargeable 53.4 Wh kg −1 Mg metal prototype is achieved with a 30 μm Mg anode, a low electrolyte/sulfur ratio (E/S = 5.58 μl mg −1 ) and a modified separator/interlayer. This work provides innovative strategies for reversible electrolyte systems and high-energy-density multivalent metal batteries.
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MICROCHIMICA ACTA
·
2025
·Vol. 192
·期 3
·1-14
·
IF 5.3
Zeng Xiangrong,Lei Xiaoting,Fan Zhenzong,Zhu Xiaoyu,Rao Liangmei,Tan Guixia,Gong Xia,Wen Yangping
A nanosensing platform was designed based on environmentally friendly cobalt phosphate-doped biochar (CoCPBC) derived from bamboo leaves for derivative voltammetric determination of hydroquinone (HQ) in water and soil samples. Highly ambient-stable CoCPBC is prepared by hydrothermal synthesis containing cobalt nitrate, phosphoric acid (H 3 PO 4 ), cetyltrimethylammonium ammonium bromide (CTAB), and bamboo leaves. Benefiting from the high effective area, the CoCPBC displays more active sites for HQ recognition and simultaneously improving the conductivity of biochar. The CoCPBC electrode shows excellent stability with retaining 99.34% of its initial current after 100 cyclic voltammetric scans. The CoCPBC nanosensor, enhanced by signal amplification, enables the determination of HQ in the concentration range 0.1–500 μM, with a detection limit of 0.052 μM. It exhibits high selectivity and excellent practicability, utilizing differential pulse voltammetry and first derivative voltammetry for detection. This work will provide an innovative method for the preparation of functional biochars from agroforestry wastes and their applications in the development of electrochemical nanosensing platforms. Highlights 1. A green and sustainable method to convert forestry waste into biochar using bamboo leaves as carbon source; 2. The acid activation and surfactant pore-expanding increase specific surface area and electrochemically-active sites; 3. Co-doping enhanced the conductivity and electrocatalytic activity of biochar. 4. Realization of derivative voltammetric determination of hydroquinone. Graphical
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CELLULOSE
·
2024
·
IF 4.9
Li Long,Hou Yansu,Zhu Yikui,Liao Jianming,Huang Luyao,Lu Pengbo,Mo Lihuan,Liu Zhan,Liu Daoheng,Li Jun
Large-scale use of petroleum-based plastic foams has caused serious environmental problems. Biodegradable and renewable plant resources have become ideal alternative materials. However, the inherent low mechanical strength and flammability of plant-based foams have prevented their widespread use. In this paper, pulp foams (PUPs) were prepared by cross-linking pulp fibers with ammonium polyphosphate (APP) in a novel and simple method. The resulting foam exhibits ultralow density (12.4 mg cm −3 ), good mechanical properties, high flame retardancy, and recyclable, degradable performance. In the compression experiment, the compressive strength of PUP (15%) foam increased by 175% at 80% strain. Besides, PUP (15%) retains its woven structure well after vertical and horizontal combustion tests. It is expected that this work will provide new insights into the production of flame-retardant foams, which have a high potential to replace flammable and non-degradable petroleum-based foams. Graphical
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BIOLOGICAL TRACE ELEMENT RESEARCH
·
2024
·
IF 3.4
Zhao Man,Xie Longqiang,Huang Wenbin,Li Meiling,Gu Xin,Zhang Wei,Wei Jintao,Zhang Niya
Cadmium (Cd) and lead (Pb) are heavy metals prevalent in the environment and feed, and they reduce production performance of domestic animals, as well as they result in residue in animal tissues. The kidney is the target tissue for Cd and Pb. And the kidney is crucial for the reabsorption of calcium (Ca), which consequently influences bone strength. However, there are relatively few studies related to the effects of Cd and Pb exposure on performance, bone strength and kidney damage in livestock. The purpose of this experiment was to explore the combined effect of Cd and Pb on growth performance and renal impairment and the possible underlying mechanism. For this, 168 1-day-old Ross 308 broilers were randomly divided into four groups of six birds each, with seven replicates in each group: control group, 50 mg Cd/kg body weight group, 200 mg Pb/kg body weight group and 50 mg Cd/kg body weight + 200 mg Pb/kg body weight group. Feed intake was recorded daily and body weight was recorded weekly. The results show that at the end of the 3rd and 6th week, one broiler from each replicate was randomly selected for sampling. Boilers co-exposed to Cd and Pb for 3 weeks and 6 weeks had significantly decreased average daily feed intake (ADFI) and average daily body weight gain (ADG) than the control group, and the ratio of feed-to-weight gain (F/G) significantly increased after 6 weeks of co-exposure to Cd and Pb. Microscopic picture and ultrastructure analyses of the kidneys showed that Cd and Pb caused kidney damage to broiler chickens, and the damage was more serious in the Cd + Pb group, which was manifested by increased renal tubular epithelial degeneration and increased interstitial stasis points. Dietary exposure to Cd and Pb impaired production performance and induced renal oxidative damage in broilers. The combined effects of Cd and Pb on the kidneys are greater than their effects alone. The PERK-ATF4 pathway mediated endoplasmic reticulum stress participates the renal oxidative damage during chronic Cd and Pb exposure.
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Scientific Reports
·
2024
·Vol. 14
·期 1
·1-12
·
IF 3.8
Wang Hui-Hui,Yin He-Liang,Yin Wei-Wei,Song Yong-Li,Chen Hong
This study introduces a novel approach for synthesizing a Cu(II)-based coordination polymer (CP), {[Cu(L)(4,4´-OBA)]·H 2 O}n ( 1 ), using a mixed ligand method. The CP was successfully prepared by reacting Cu(NO 3 ) 2 ·3H 2 O with the ligand 3,6-bis(benzimidazol-1-yl)pyridazine in the presence of 4,4´-H 2 OBA, demonstrating an innovative synthesis strategy. Furthermore, a novel hydrogel composed of hyaluronic acid (HA) and carboxymethyl chitosan (CMCS) with a porous structure was developed for drug delivery purposes. This hydrogel facilitates the encapsulation of CP 1 , and enables the loading of paclitaxel onto the composite to form HA/CMCS-CP 1 @paclitaxel. In vitro cell experiments demonstrated the promising modulation of thyroid cancer biomarker genes S100A6 and ARID1A by HA/CMCS-CP 1 @paclitaxel. Finally, reinforcement learning simulations were employed to optimize novel metal–organic frameworks, underscoring the innovative contributions of this study.
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APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2024
·Vol. 130
·期 8
·1-13
·
IF 2.5
Xie Zhuojia,Xu Changji,Jiang Xinyu,Zhang Weijian,Feng Min,Zhong Shenglin,Zou Zhengguang
With the growing attention to perovskite materials in the field of magnetic refrigeration. In this work, La 0.8−x Pr x Sr 0.2 MnO 3 (x = 0.05, 0.10, 0.15) (LPSMO) samples were synthesized through the sol–gel method. The effects of Pr 3 ⁺ doping on the structure, morphology, and magnetization of LPSMO were investigated. The XRD analysis revealed that the LPSMO samples have a rhombohedral structure within the R-3c space group. As the amount of Pr 3 ⁺ doping increased, the cell volume decreased. The magnetic properties of LPSMO exhibited a transition from ferromagnetic (FM) to paramagnetic (PM) near the Curie temperature (Tc), with Tc decreasing as the Pr 3 ⁺ doping level increased. The second-order magnetic phase transition of LPSMO near Tc was confirmed by employing the MPMS. The maximum magnetic entropy change ( \(-\Delta {S}_{M}^{max}\) ) of LPSMO is 4.92 J/(kg·K) (x = 0.05), 5.13 J/(kg·K) (x = 0.10) and 5.04 J/(kg·K) (x = 0.15) when the external magnetic field (H) = 5 T, separately. Meanwhile, the relative cooling power ( RCP ) of LPSMO are 283.88, 276.71, and 289.60 J·kg −1 , respectively. The experiments indicate that LPSMO has promising application prospects.
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Food Production Processing and Nutrition
·
2024
·Vol. 6
·期 1
·1-17
·
IF 4
Sun Yujiao,Li Baobao,Xue Yuanye,Wang Jiankang,Miao Bingbing,Liu Yang,Li Yanjun,Cao Yungang,Chang Dawei
Stipes are the major waste from the processing of Lentinus edodes . To make full use of L. edodes stipes (LES), different fractions of LES polysaccharides (LESPs) were first obtained by water extraction and gradient ethanol precipitation. Afterwards, the LES residues were treated with an optimal combination of Aspergillus niger and Saccharomyces cerevisiae for the preparation of soluble/insoluble dietary fibers (LESS/LESI) using the response surface methodology and the Box-Behnken design. Subsequently, the in vitro immunomodulatory activity of LESPs and LESS, as well as the adsorption capacities of LESI were evaluated. The results showed that LESPs were neutral polysaccharides, mainly containing glucose. The optimal parameters for modifying the residues of LES were the followings: 4% ( w / w ) A. niger , 8% ( w / w ) S. cerevisiae , 31 ℃, 3 d, and a solid–liquid ratio of 1:12.5 in a yield of 14.73%/82.45% of LESS/LESI, respectively. The in vitro immunomodulatory activity assays revealed that LESPs and LESS had potent immunostimulatory activity to increase phagocytosis, acid phosphatase activity and nitric oxide production of RAW264.7 murine cell macrophages. The evaluation of adsorption capacities revealed that LESI owned stronger water holding capacity, oil holding capacity and water swelling capacity. This research could provide an effective way to fully utilize discarded L. edodes stipes with high added-value. Graphical Abstract An effective strategy was built to fully utilize discarded L. edodes stipes by preparing polysaccharides (LESPs-20, LESPs-50 and LESPs-80), soluble and insoluble dietary fibers (LESS/LESI). Their products showed immunomodulatory activity and adsorption capacities.
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npj Clean Water
·
2024
·Vol. 7
·期 1
·1-13
·
IF 10.4
Chen Chao,Yang Yu,Choo Kwang-Ho,Ng How Yong,Takizawa Satoshi,Hou Li-an
Membrane biofouling poses an ongoing challenge in seawater reverse osmosis (SWRO) desalination. Here we delved into the impact of seasonal variations in microbial communities on membrane biofouling and innovatively fabricated quorum sensing inhibitors (acylase (AC) and methyl anthranilate (MA))-modified membranes to combat it. Results indicated that Proteobacteria dominated in seawater and membrane biofilm across all seasons, while other phyla varied seasonally. At the class level, the two leading bacteria on the membrane were Gamma- and Alphaproteobacteria , constituting 14–48% and 4–27%, respectively. Genera like Arcobacter , Vibrio , and Rhodobacteraceae were identified as keystone species that exhibited a significant positive correlation with extracellular polymeric substance (EPS) and biofilm formation, leading to a substantive reduction in membrane flux by 70 to 77%. The introduction of AC and MA inhibitors on the membrane suppressed keystone bacteria Rhodobacteraceae and Arcobacter and affected their metabolism, thereby significantly reducing EPS by 65–69% and 55–59%, respectively, and alleviating membrane flux decline by 30–32% and 18–22%, respectively, compared to the pristine membrane. These findings shed new light on the seasonal patterns of membrane biofouling and provide valuable insights into anti-biofouling strategies based on QS inhibition for collaborative biofilm formation.
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