RSC Advances
·
2023
·Vol. 13
·期 31
·21199-21210
·
IF 3.9
Yunjia Xu,Jingming Lan,Baoying Wang,Chunmiao Bo,Junjie Ou,Bolin Gong
Removal of heavy metal pollution is an endless topic, because heavy metals can cause irreversible damage to the human body and environment. It is urgent to develop novel materials for detection and adsorption of heavy metal ions. In this paper, waste wolfberry straw was utilized as a carbon source, and two simple methods were developed to successfully prepare activated carbon (AC) and carbon quantum dots (CQDs). The fabrication conditions were optimized by adjusting the mass ratio of precursor to activator, type of activator and activation times. When sodium hydroxide (NaOH) was selected as an activator (6 : 1, mass ratio of NaOH to AC-precursor), and the activation was performed at 600 °C for 1 h, the highest specific surface area of the obtained AC-NaOH-3 reached 3016 m2 g−1. The adsorption capacity for copper ions (Cu2+) reached 68.06 mg g−1. The preparation conditions for CQDs were also optimized by adjusting the concentration of wolfberry stem, reaction time and temperature. When the wolfberry stem concentration was 7.5 g L−1, and the activation was performed at 200 °C for 24 h, the obtained CQDs exhibited strong fluorescence emission in the blank and 12 kinds of metal ion solutions, respectively, however, the fluorescence intensity was remarkably decreased after adding Cu2+. In the range of 10–80 nM, the linear correlation coefficient between the concentration of Cu2+ and fluorescence intensity of CQDs was 0.992, and the limit of detection was 2.83 nmol L−1. Thus, these two kinds of materials were prepared from wolfberry stem, which opened up a new way for the application in adsorption and detection of copper ions.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PEST MANAGEMENT SCIENCE
·
2023
·
IF 4.1
Yuxuan Cao,Xu Zhang,Xiaoning Song,Wenkui Li,Zheng Ren,Juntao Feng,Zhiqing Ma,Xili Liu,Yong Wang
BACKGROUND Sclerotinia stem rot caused by Sclerotinia sclerotiorum seriously endangers oilseed rape production worldwide, and the occurrence of fungicide-resistant mutants of S. sclerotiorum leads to control decline. Thus, it is critical to explore new green substitutes with different action mechanisms and high antifungal activity. Herein, the activity and the action mechanism of natamycin against S. sclerotiorum were evaluated. RESULTS Natamycin showed potent inhibition on the mycelial growth of S. sclerotiorum , and half-maximal effective concentration (EC 50 ) values against 103 S. sclerotiorum strains ranged from 0.53 to 4.04 μg/mL (mean 1.44 μg/mL). Natamycin also exhibited high efficacy against both carbendazim- and dimethachlone-resistant strains of S. sclerotiorum on detached oilseed rape leaves. No cross-resistance was detected between natamycin and carbendazim. Natamycin markedly disrupted hyphal form, sclerotia formation, integrity of the cell membrane, and reduced the content of oxalic acid and ergosterol, whereas it increased the reactive oxygen species (ROS) and malondialdehyde content. Interestingly, exogenous addition of ergosterol could reduce the inhibition of natamycin against S. sclerotiorum . Importantly, natamycin significantly inhibited expression of the Cyp51 gene, which is contrary to results for the triazole fungicide flusilazole, indicating a different action mechanism from triazole fungicides. CONCLUSION Natamycin is a promising effective candidate for the resistance management of S. sclerotiorum . © 2023 Society of Chemical Industry.
研究领域:
植物病理学
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真菌学
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农业科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CARBOHYDRATE POLYMERS
·
2025
·
IF 12.5
Meiting Liu,Hongbin Pu,Da-Wen Sun
Microplastics that eventually convert into nanoplastics are emerging global pollutants and the development of efficient adsorbents for their removal is urgently needed. For sustainability and eco-friendliness, in the current study, a polysaccharide aerogel (LPA) was prepared with lily bulbs as the raw material by following water bath extraction, purification and freeze-drying processes. The prepared porous LPA was then applied as a packing material in a mini adsorption column for removing polystyrene (PS) microplastics and nanoplastics. Results revealed that LPA was over 90 kDa in size and consisted mainly of glucomannan and the removal efficiencies for microplastics and nanoplastics were 93.68 % and 96.98 %, respectively, mainly due to hydrogen bonding interactions and porous structure. The adsorption column was robust and maintained a remarkable removal efficiency (over 90 %) for 3 months. In addition, the effects of other extraction methods and pre-freezing conditions before the freeze-drying process were studied. Compared with water bath extraction, ultrasonic-assisted extraction and microwave-assisted extraction transformed the LPA structure, resulting in reduced adsorption ability, while the pre-freezing temperature could be used to adjust the specific surface area. Meanwhile, the effects of temperature and pH of adsorbates were also investigated. The LPA was heat sensitive and not stable under strongly acidic (pH 4) or strongly alkaline (pH 10) conditions, resulting in a sharp decline in removal efficiency. The adsorption behaviour of LPA was further described via adsorption kinetic models, showing that the microplastics and nanoplastics adsorptions could be fitted by pseudo-second-order and pseudo-first-order models, respectively. Moreover, the adsorption performance of LPA was compared with some other aerogels and had a better result. This research provides a promising, sustainable alternative for microplastic and nanoplastic removal that has potential for pollutant adsorption and sample purification as well as a low preparation cost.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2014
·
IF 3.259
Yinghua Xie,Yunxia Zheng,Xiling Dai,Quanxi Wang,Jianguo Cao,Jianbo Xiao
The seasonal dynamics of the total flavonoid contents in various parts of Dryopteris erythrosora , a traditional Chinese medicinal fern, and their antioxidant activity were investigated. The total flavonoids content in various parts of D. erythrosora showed an obvious seasonal dynamic change. The total flavonoid contents in stems (from 4.3% to 12.5%) were much higher than that in leaves with an average content of 2.01%. In spring, the total flavonoid contents in stems were relatively low, but increased rapidly from summer to winter. However, the seasonal dynamics of total flavonoid contents in leaves showed different model. The total flavonoid contents in the stems showed a negative correlation with that in the leaves from January to July. The correlation coefficient of about −0.7 was obtained. The antioxidant activity of the extracts also altered in proportion to the change of total flavonoid contents. In general, the extracts from stems always showed highest antioxidant potentials and it was suggested that the stems can be used as crude medicine.
研究领域:
植物学
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药理学
✓ 已验证
DOI
高影响因子
Biotechnology for Biofuels and Bioproducts
·
2023
·Vol. 16
·期 1
·1-11
·
IF 0
Zhang Zhen,Tao Furong,Ji Hairui
Background As one of the most abundant bioresource in nature, the value-added utilization of lignocellulosic biomass is limited due to its inherent stubbornness. Pretreatment is a necessary step to break down the recalcitrance of cell walls and achieve an efficient separation of three main components (cellulose, hemicelluloses, and lignin).Results In this study, hemicelluloses and lignin in Boehmeria nivea stalks were selectively extracted with a recyclable acid hydrotrope, an aqueous solution of P-toluenesulfonic acid (p-TsOH). 79.86% of hemicelluloses and 90.24% of lignin were removed under a mild pretreatment condition, C80T80t20, (acid concentration of 80 wt%, pretreatment temperature and time of 80 °C and 20 min, respectively). After ultrasonic treatment for 10 s, the residual cellulose-rich solid was directly converted into pulp. Subsequently, the latter was utilized to produce paper via mixing with softwood pulp. The prepared handsheets with a pulp addition of 15 wt% displayed higher tear strength (8.31 mN m2/g) and tensile strength (8.03 Nm/g) than that of pure softwood pulp. What’s more, the hydrolysates of hemicelluloses and the extracted lignin were transformed to furfural and phenolic monomers with yields of 54.67% and 65.3%, respectively.Conclusion sThe lignocellulosic biomass, Boehmeria nivea stalks, were valorized to pulp, furfural, and phenolic monomers, successfully. And a potential solution of comprehensive utilization of Boehmeria nivea stalks was provided in this paper.Graphical Abstract
研究领域:
生物化学
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材料科学
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可再生资源利用
✓ 已验证
产品关联
DOI
PubMed
CARBOHYDRATE POLYMERS
·
2022
·
IF 10.723
Quan Yan,Xiaoyan Long,Puxiang Zhang,Wei Lei,Dequn Sun,Xiaoying Ye
Uncontrolled bleeding and infection following trauma remain a clinical challenge. Here, we developed a synergistic hemostatic and antibacterial aerogel dressing based on oxidized Bletilla rhizome polysaccharide Schiff Base (ORBPS) and polyvinyl alcohol (PVA) by using a combined freeze-drying/cross-linking process. Bletilla rhizome polysaccharide (RBP) was extracted by water extraction and alcohol precipitation. RBP contained mannose and glucose in the molar ratio of 2:1 and its molecular weight was 8.2 × 10 5 g/mol. ORBPS was prepared via Schiff base reaction between silver sulfadiazine and oxidized RBP (ORBP), and verified by FTIR and NMR spectra . The resultant ORBPS/PVA aerogel exhibited excellent antibacterial and hemostatic capabilities. The aerogel also showed good liquid absorption capacity and biocompatibility. Full-thickness skin defect experiments indicated the aerogel enhanced wound healing by reducing inflammation, promoting angiogenesis , and accelerating epithelialization . Therefore, ORBPS/PVA aerogel may be a potential hemostasis and anti-infection wound dressing.
研究领域:
生物材料学
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医学
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药理学
✓ 已验证
DOI
PubMed
高影响因子
Surfaces and Interfaces
·
2024
·
IF 5.7
Wenhui Tian,Penggang Ren,Xin Hou,Runzhuo Xue,Zhengyan Chen,Zhengzheng Guo,Yanling Jin,Fang Ren
As the most attractive electrode for supercapacitors , renewable carbon-based material exhibits slow charge and discharge ability and low volumetric energy density , severely hindering its extended applications. Herein, a neotype and high-performance carbon-based nanocomposites were successfully prepared from Linum usitatissimum . L stems assisted with K 4 Fe(CN) 6 ·3H 2 O through a green and straightforward high-temperature treatment method. Benefiting from the activation and decomposition of K 4 Fe(CN) 6 ·3H 2 O, the carbon-based nanocomposite decorated by Fe 3 C and Fe 3 O 4 possesses moderate porous volume, heteroatoms content, and graphitization degree. These characteristics endow the supercapacitor assembled from as-prepared carbon-based nanocomposite with fast charge/discharge ability, high volumetric capacitance (303.8 F cm −3 , 1 A g −1 ), excellent rate performance (61.3%, 100 A g −1 ), and outstanding cycle life. Owing to abundant N/O-containing functional groups, high C=C content, and appropriate specific surface area , the resultant nanocomposite also exhibits excellent organic dye removal performance. Overall, this work offers a green and efficient avenue for designing multi-doped carbon-based nanocomposites in electrochemical energy storage and organic dye removal.
研究领域:
材料科学
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电化学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2025
·Vol. 172
·期 4
·045502
·
IF 3.3
Lingling Zhang,Shuangru Yang,Yuge Liu,Yongmei Jia,Zhiguo Li
Understanding the electron transfer performance of DNA self-assembled monolayers (SAMs) on a transducer substrate was important for constructing DNA electrochemical sensors with high sensitivity. Here we immersed the gold electrodes in mixed solutions comprising thiol-modified stem-loop DNA (SL-DNA) or linear DNA (L-DNA) terminally bound with methylene blue (MB), and aliphatic thiols (HOC6SH, C6SH, HOOCC5SH, H2NC6SH, HOC11SH, C12SH, or HOOCC10SH) to obtain DNA/thiols mixed self-assembled monolayers (SAMs). MB electron transfer performances through SL-DNA/thiols and L-DNA/thiols mixed SAMs were investigated by cyclic voltammetry (CV). Our results showed that the mixed assembly of thiols with DNA was conducive to MB electron transfer. The electron transfer rate (ks) values of MB through L-DNA SAMs were bigger than those through SL-DNA SAMs, indicating that the flexibility of DNA chains was important to MB electron transfer. Thiols chain length or terminal groups influenced ks of MB significantly, that increasing NaCl or MgCl2 concentrations in solution around DNA availed MB electron transfer, and Mg2+ advanced MB electron transfer more than Na+, and that the stability of L-DNA/thiols SAMs was much better than SL-DNA/thiols SAMs. These conclusions might provide a reference for studying DNA electron transfer mechanisms or designing DNA or RNA electrochemical sensors with optimal performance.
研究领域:
生物化学
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电化学传感器
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分子生物学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2019
·
IF 4.784
Bing Liu,Zhen-Zi Shang,Qiang-Ming Li,Xue-Qiang Zha,De-Ling Wu,Nian-Jun Yu,Lan Han,Dai-Yin Peng,Jian-Ping Luo
The structure features and anti-gastric cancer activities in vitro of stem, root, leaf and flower polysaccharides from cultivated Dendrobium huoshanense were investigated systematically. Stem polysaccharide (cDHPS) was composed of →4)-β-D-Glc p -(1→, →4)-β-D-Man p -(1→, →4)-3- O -acetyl-β-D-Man p -(1→ with the molecular weight of 2.59 × 10 5 Da; root polysaccharide (cDHPR) was composed of →3,5)-α-L-Ara f -(1→, →4)-β-D-Glc p -(1→, →4)-β-D-Man p -(1→, →4,6)-β-D-Man p -(1→, →6)-α-D-Gal p -(1→ and terminal β-L-Ara f with the molecular weight of 1.41 × 10 4 Da; leaf polysaccharide (cDHPL) was composed of →4)-β-D-Glc p -(1→, →4)-β-D-Man p -(1→, →4)-3- O -acetyl-β-D-Man p -(1→, →3,6)-β-D-Man p -(1→ and terminal α-D-Gal p with the molecular weight of 2.09 × 10 5 Da; and flower polysaccharide (cDHPF) was composed of →4)-β-D-Glc p -(1→, →4)-β-D-Man p -(1→, →3,6)-β-D-Man p -(1→ and terminal α-D-Gal p with the molecular weight of 4.78 × 10 5 Da. Among these four polysaccharides, cDHPS showed the best anti-gastric cancer activity evidenced by the inhibited growth and c-myc expression as well as the enhanced apoptosis and p 53 expression of murine forestomach carcinoma (MFC) cells, suggesting their difference in anti-gastric cancer activity should be contributed to their difference in structure features.
研究领域:
药理学
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肿瘤学
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植物化学
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分子生物学
✓ 已验证
DOI
PubMed
高影响因子
Parasites & Vectors
·
2014
·Vol. 7
·期 1
·1-5
·
IF 3.251
Liu Xin Chao,Liu Qiyong,Zhou Ligang,Liu Zhi Long
Background During the screening programme for new agrochemicals from Chinese medicinal herbs and local wild plants, the essential oil of dried bulbs of Allium macrostemon Bunge (Liliaceae) was found to possess larvicidal activity against mosquitoes. The aim of this research was to determine the larvicidal activity of the essential oil and its major constituent compounds against the larvae of the Culicidae mosquito, Aedes albopictus.Methods Essential oil of A. macrostemon was obtained by hydrodistillation and analyzed by gas chromatography (GC) and gas chromaotography-mass spectrometry (GC-MS). The activity of the essential oil and its two major constituents were evaluated, using World Health Organization (WHO) procedures, against the fourth instar larvae of Ae. albopictus for 24 h and larval mortalities were recorded at various essential oil/compound concentrations ranging from 9.0 - 150 μg/ml.Results The essential oil of A. macrostemon exhibited larvicidal activity against the early fourth instar larvae of Ae. albopictus with an LC50 value of 72.86 μg/ml. The two constituent compounds, dimethyl trisulfide and methyl propyl disulfide possessed strong larvicidal activity against the early fourth instar larvae of Ae. albopictus with LC50 values of 36.36 μg/ml and 86.16 μg/ml, respectively.Conclusion The results indicated that the essential oil of A. macrostemon and its major constituents have good potential as a source for natural larvicides.
研究领域:
昆虫学
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植物化学
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公共卫生
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FITOTERAPIA
·
2017
·
IF 2.698
Ye Liu,Tian Tian,Heng-Yi Yu,Ming Zhou,Han-Li Ruan
An extensive phytochemical study on the stems and leaves of Schisandra viridis A. C. Smith led to the isolation of two novel highly oxygenated schinortriterpenoids, pre-schisanartanin P ( 1 ) and wuweizidilactone Q ( 2 ), together with four known ones ( 3–6 ). Their structures with absolute configurations were established on the basis of comprehensive spectroscopic methods, including HRESIMS, 1D and 2D NMR analyses and ECD experiments. All isolates were evaluated for their in vitro cytotoxicities against HepG2, MCF-7 and HT-29 cancer cell lines, none of them showed significant activities.
研究领域:
植物化学
·
药物化学
·
肿瘤学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
LWT-FOOD SCIENCE AND TECHNOLOGY
·
2022
·
IF 6.056
Fenghua Jiang,Lei Zhou,Wei Zhou,Zhiwei Zhong,Kaibo Yu,Jing Xu,Liqiang Zou,Wei Liu
Fresh-cut lily bulbs have broad consumption prospects in the vegetable market due to their high nutritional value and convenience in processing; however, potential discoloration and microbial infection during storage adversely affect their quality. This study investigated the effect of modified atmosphere packaging (MAP) and plant essential oils (EOs) on the preservation of lily bulbs. The results showed that MAP significantly preserved the color and weight of lily bulbs, and different MAP conditions caused different effects on bacterial inhibition. Low oxygen-MAP (L-MAP) showed a stronger antibacterial effect than air-MAP (A-MAP), whereas appropriate antibacterial agents were still needed to improve the antibacterial effect. Therefore, plant EOs were employed to further control the growth of microorganisms by preparing plant EO solid particles (PESP). The combined use of L-MAP and PESP significantly prolonged the shelf life of lily bulbs to 12 d with higher contents of nutrients and better appearance quality compared to the control. Furthermore, the physiological metabolism of lily bulbs was regulated by combined treatment with L-MAP and PESP, which inhibited starch degradation, MDA accumulation and respiratory oxidase activities.
研究领域:
食品科学
·
植物学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）