Biology-Basel
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2020
·Vol. 9
·期 7
·171
·
IF 3.796
Jianming Zhang,Yushan Bu,Chengcheng Zhang,Huaxi Yi,Daqun Liu,Jingkai Jiao
At present, De Man, Rogosa and Sharpe (MRS) broth is the medium of choice for promoting bacteriocin production. However, this medium is expensive and not applicable for large-scale production. Therefore, a low-cost and high-efficiency culture medium for bacteriocin Lac-B23 production byLactobacillus plantarumJ23 was developed. First, the effects of the composition of MRS broth on bacteriocin Lac-B23 production and bacterial growth were researched by a one variable at a time approach. Then, a Plackett-Burman design was used to screen significant components for production. Finally, the steepest ascent and central composite designs were used to obtain an optimum medium. The final composition of the modified MRS was much simpler than MRS broth, and the modified MRS contained only glucose, yeast extract, dipotassium phosphate, manganese sulfate monohydrate, Tween 80 and sodium acetate anhydrous. The highest bacteriocin Lac-B23 production reached 2560 activity units (AU)/mL in the modified MRS, which is nine times higher than that in MRS broth (280 AU/mL). Meanwhile, the cost per liter of the modified MRS (8.56 Ren Min Bi (RMB)/L) is 34.70% the cost of MRS broth (13.11 RMB/L), and the cost per arbitrary units of bacteriocin Lac-B23 in the modified MRS is approximately fourteen times more convenient (3.34 RMB/106AU) than in the MRS broth (46.82 RMB/106AU).Keywords:bacteriocin Lac-B23;low-cost;high-efficiency;culture medium
研究领域:
微生物学
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食品科学
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DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Zhichun Shi,Haoyuan Tang,Liqiu Sun,Jianjun Wang,Jun Li,Dan Wang,Liying Qi,Liyan Wang,Guohua Dong,Ming Zhao
Designing and preparing of materials for highly efficient and reversible iodine adsorption remains a challenging task. In this study, a series of benzonquanmine-based hypercrosslinked polymers (BHCPs) with nitrogen-rich were designed and synthesized via Friedel-Crafts reaction. The obtained BHCPs showed the high specific surface and high thermal stability. Moreover, the BHCP-3 of BHCPs exhibits excellent iodine capture performance, including ultrahigh iodine vapor adsorption capacity of 619 wt%, the breakthrough iodine experiment of the adsorption capacity reached 2.29 g/g, which is the highest published capacity of HCP adsorbent. And the removal rate of iodine in aqueous solution also reached 92.5 %, and reached 87.4 % the first 10 min, demonstrating rapid adsorption effects. Additionally, the iodine adsorption process of BHCPs conformed to the pseudo-second-order kinetic models, and which were a multi-layer adsorption on non-homogeneous surfaces. Furthermore, the three adsorbents maintained more than 85 % of their iodine capture capacity after five cycles, demonstrating their good recyclability and potential for practical applications.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
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2022
·Vol. 23
·期 13
·6928
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IF 6.208
Meixing Wang,Huizhen Hu,Buyu Zhang,Yang Zheng,Pan Wu,Zhenghui Lu,Guimin Zhang
Panose is a type of functional sugar with diverse bioactivities. The enzymatic conversion bioprocess to produce high purity panose with high efficiency has become increasingly important. Here, a new neopullulanase (NPase), Amy117 fromB. pseudofirmus703, was identified and characterized. Amy117 presented the optimal activity at pH 7.0 and 30 °C, its activity is over 40% at 10 °C and over 80% at 20 °C, which is cold-active. The enzyme cleaved α-1, 4-glycosidic linkages of pullulan to generate panose as the only hydrolysis product, and degraded cyclodextrins (CDs) and starch to glucose and maltose, with an apparent preference for CDs. Furthermore, Amy117 can produce 72.7 mg/mL panose with a conversion yield of 91% (w/w) based on 80 mg/mL pullulan. The sequence and structure analysis showed that the low proportion of Arg, high proportion of Asn and Gln, and high α-helix levels in Amy117 may contribute to its cold-active properties. Root mean square deviation (RMSD) analysis also showed that Amy117 is more flexible than two mesophilic homologues. Hence, we discovered a new high-efficiency panose-producing NPase, which so far achieves the highest panose production and would be an ideal candidate in the food industry.Keywords:neopullulanase (NPase);pullulan;panose production;high-efficiency
研究领域:
食品科学
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酶学
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生物技术
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DOI
PubMed
高影响因子
MOLECULES
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2023
·Vol. 28
·期 17
·6305
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IF 4.6
Zhemin Xie,Sijie Diao,Ruizheng Xu,Guiyu Wei,Jianfeng Wen,Guanghui Hu,Tao Tang,Li Jiang,Xinyu Li,Ming Li,Haifu Huang
The exploration of low-cost, high-performance adsorbents is a popular research issue. In this work, a straightforward method that combined hydrothermal with tube firing was used to produce Osmanthus fragrans biomass charcoal (OBC) from low-cost osmanthus for dye adsorption in water. The study examined the parameters of starting concentration, pH, and duration, which impacted the process of adsorption of different dyes by OBC. The analysis showed that the adsorption capacities of OBC for six dyes: malachite green (MG,C0= 800 mg/L, pH = 7), Congo red (CR,C0= 1000 mg/L, pH = 8), rhodamine B (RhB,C0= 500 mg/L, pH = 6), methyl orange (MO,C0= 1000 mg/L, pH = 7), methylene blue (MB,C0= 700 mg/L, pH = 8), and crystalline violet (CV,C0= 500 mg/L, pH = 7) were 6501.09, 2870.30, 554.93, 6277.72, 626.50, and 3539.34 mg/g, respectively. The pseudo-second-order model and the Langmuir isotherm model were compatible with the experimental findings, which suggested the dominance of ion exchange and chemisorption. The materials were characterized by using XRD, SEM, FTIR, BET, and XPS, and the results showed that OBC had an outstanding specific surface area (2063 m2·g–1), with potential adsorption mechanisms that included electrostatic mechanisms, hydrogen bonding, and π-π adsorption. The fact that the adsorption capacity did not drastically decrease after five cycles of adsorption and desorption suggests that OBC has the potential to be a dye adsorbent.Keywords:osmanthus fragrans biomass charcoal;adsorbent;high efficiency;dye adsorption;regeneration cycle
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
Nano Today
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2024
·
IF 13.2
Bin Wang,Hui Zhu,Brian Shutes
The emergence of hydrogel evaporators has greatly improved the evaporation rate and has attracted widespread attention. However, single-strategy design yields limited evaporation rates and anti-fouling properties, restricting their utility. Here, we report a superhydrophilic interconnected porous hydrogel (SIPH) evaporator that incorporates multiple strategirs. This design enhances water transport, light absorption , and heat localization, reducing heat loss from the evaporating surfaces. By modulating polymer network-water interactions with −NH 2 groups, we achieved a high proportion of activated water, lowering the evaporation enthalpy to about one-third that of pure water. Based on this diversified design, SIPH achieves a high evaporation rate of 4.80 kg m −2 h −1 under one sun. Moreover, SIPH demonstrates excellent stability in various water qualities and long-lasting anti-pollution properties, offering significant practical application potential.
研究领域:
材料科学
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环境工程
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能源研究
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产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
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2024
·
IF 18.5
Huayang Zhang,Guopeng Chen,Shangzhen Xie,Ye Fu,Guangyi Tian,Jianyong Zheng,Biao Wang,Zhiguang Guo
Fog harvest has emerged as a direct and efficient water harvesting technology to relieve the intense pressure of freshwater scarcity worldwide. With the vagaries of climate and increasing amount of energy consumption, high-efficiency fog harvest devices focus on the fast water droplet capture and transportation are highly desired. In this study, a novel harp structure is developed using cross-twisted copper filaments arranged in a spatial triangular pattern to enhance water droplet capture and transportation. Inspired by the natural differences in Laplace pressure observed in cactus and spider silks, this design accelerates the movement of water bridges. Besides, drawing on the fruit waxes on the surface of hogweed and blueberries, a paraffin wax coating is applied on the copper sheet frame to create a solid slip frame, improving the synergy between filament capture and frame transportation. The monolithic fog collector (MFC) thus achieves a significant increase in fog harvest efficiency and demonstrates excellent durability. Integration of the MFCs into a 3D high-efficiency fog harvest system results in a harvest rate of 0.5027 g cm −2 min −1 , showing promise for practical applications due to its durability, simplicity, and environmental friendliness.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
ACS Applied Optical Materials
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2024
·
IF 0
Yonghang Li,Yang Lu,Haonan Ju,Wei Wang,Dong Tu,Hongyu Lu,Jiayu Wang,Hua Zou
Near-infared phosphor-converted light-emitting diodes (NIR pc-LEDs) are next-generation NIR light sources due to their long life, low cost, and compactness. Unfortunately, there is a lack of efficient NIR-II phosphors with high efficiency and large full width at half-maximum (fwhm) that can be excited by violet LED. Here, a series of Cr3+/Ni2+-codoped LiAlSiO4 with unprecedented emission peaking at 1150 nm (∼1000–1400 nm, fwmh ∼191 nm) were synthesized via a solid-state reaction. More importantly, the phosphors exhibit high efficiency and excellent thermal stability under violet emission excitation. Moreover, the NIR pc-LED devices as a NIR-II light source have been fabricated through a combination violet LED and optimized LiAlSiO4:Cr3+/Ni2+ phosphors, which are well applied to high-penetration imaging and nondestructive fruit damage inspection. These results indicate that the LiAlSiO4:Cr3+/Ni2+ phosphors have great potential applications as NIR light sources.
研究领域:
材料科学
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光学工程
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电子器件
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DOI
MATERIALS LETTERS
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2021
·
IF 3.423
Antuo Wang,Xianglong Li,Teng Hou,Yishen Lu,Jing Zhou,Xianggui Zhang,Bin Yang
In order to solve the problem of air pollution, especially in high temperature environment, an ultrafine poly(tetrafluoroethylene) (PTFE) porous fibrous membrane (UPPFM) was created by electro-centrifugal spinning, sintering calcination and impregnation technology in this paper. The pores distribution on the surface of the fibers could be simply controlled by adjusting PVP/PTFE ratios, and prompted the porosity of obtained membrane up to 94.1%. The obtained membrane presented an ultralow air resistance to 89.9 Pa with filtration efficiency higher than 99.72%. Moreover, UPPFM showed excellent heat stability and reusability, and therefore exhibited a great potential application in the high temperature air filtration.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
Advanced Materials Interfaces
·
2021
·Vol. 8
·期 16
·2100852
·
IF 6.147
Shaokang Yu,Wei Chen,Yixuan Wang,Ran Zhao,Ruhua Zang,Jianmin Gu,Jingxin Meng,Shutao Wang
The leakage of offshore crude oil and the discharge of industrial oily wastewater always bring great harm to human health and ecological environment. To solve these problems, advanced interfacial materials for oil–water separation have attracted wide attentions. However, most of these materials still have several disadvantages including complicated preparation process, low separation efficiency, and easy damage. Herein, a nacre-inspired biomineralized mesh (NBM) with underwater superoleophobicity shows scalable and robust oil–water separation with high efficiency. Through the combination of dip coating and biomineralization, the NBM is readily scalable fabrication. Similar chemical components and micro-nanostructures to the natural nacre endow the NBM with good mechanical properties. Furthermore, the NBM can resist to sand impingement and knife scratch along high efficiency of oil–water separation (≈99.9%) even after repeated use for 50 times, which may come from its high hardness and Young's modulus. Therefore, this study provides new insights for the scalable development of oil–water separation materials with high efficiency and robustness.
研究领域:
材料科学
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环境科学
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仿生学
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产品关联
DOI
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 18
·3125
·
IF 5.719
Kuiyuan Zhang,Xiangrong Shi,Guangyu Wu,Yudong Huang
Polymer doping is an efficient approach to achieve self-healing perovskite solar cells. However, achieving high self-healing efficiency under moderate conditions remains challenging. Herein, an innovative self-healable polysiloxane (PAT) containing plenty of thiourea hydrogen bonds was designed and introduced into perovskite films. Abundant thiourea hydrogen bonds in PAT facilitated the self-healing of cracks at grain boundaries for damaged SPSCs. Importantly, the doped SPSCs demonstrated a champion efficiency of 19.58% with little hysteresis, almost rivalling those achieved in control atmosphere. Additionally, owing to the effective chelation by PAT and good level of thiourea hydrogen bonds, after 800 cycles of stretching, releasing and self-healing, the doped SPSCs retained 85% of their original IPCE. The self-healing characteristics were demonstrated in situ after stretching at 20% strain for 200 cycles. This strategy of pyridine-based supramolecular doping in SPSCs paves a promising way for achieving efficient and self-healable crystalline semiconductors.Keywords:self-healing;perovskite solar cell;ambient environment;high efficiency;energy harvesting
研究领域:
材料科学
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能源技术
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产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Yu Jiang,Huan Liu,Raz Muhammad,Xinjiang Luo,Kaixin Song,Minmin Mao,Shikuan Sun,Hadi Barzegar Bafrooei,Ehsan Taheri-Nassaj,Yaseen Iqbal,Rong Sun,Dawei Wang
Garnet-typed ceramics of Y 3 Mg 1- x Mn x Al 3 SiO 12 (0 ≤ x ≤ 0.2) have been synthesized using the traditional solid-state reaction method. The optimal microwave dielectric properties ( ε r = 10.73, Q׃ = 62,824 GHz, τ f = −34.8 ppm/°C) are obtained for Y 3 Mg 0.9 Mn 0.1 Al 3 SiO 12 ( x = 0.1) sintered at 1575 °C for 5h. A millimeter-wave dielectric resonator antenna is designed and fabricated using Y 3 Mg 0.9 Mn 0.1 Al 3 SiO 12 as a dielectric unit due to its excellent characteristics of low dielectric constant and high Q׃ . The designed DRA resonates at 24.94 GHz with a bandwidth ∼2.20 GHz (S 11 < −10 dB). The simulated gain and efficiency are 6.64 dBi and 91.08%, respectively. The results indicate that the Y 3 Mg 0.9 Mn 0.1 Al 3 SiO 12 ceramic has a potential application as an antenna for the 5G/6G millimeter wave frequency band.
研究领域:
材料科学
·
通信工程
·
电子工程
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2024
·
IF 5.7
Weiguang Ran,Jiayi Geng,Ziyou Zhou,Chunyuan Zhou,Fukai Wang,Ming Zhao,Tingjiang Yan
The development of efficient and thermally stable narrow-band-emitting phosphors is crucial for wide color gamut display applications. Herein, we have developed a novel narrow-band green-emitting RbK2Na(Li3SiO4)4:Eu2+ phosphor with remarkable luminescence properties. The phosphor exhibits a main green emission band at 535 nm, with a narrow full width at half maximum of 51 nm, attributed to its unique rigid structure and highly symmetric cationic sites. Furthermore, it demonstrates excellent thermal stability, retaining 90.95% of the integrated emission intensity at 500 K compared to that at 100 K, and exhibits a high internal quantum efficiency of 82.51%. By combining RbK2Na(Li3SiO4)4:5%Eu2+ with commercial red K2SiF6:Mn4+ phosphors and blue GaN chips, a white light-emitting diode device with a wide color gamut (103% NTSC) was prepared, demonstrating the potential of the RbK2Na(Li3SiO4)4:Eu2+ phosphor for liquid-crystal backlight applications.
研究领域:
材料科学
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光电技术
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显示技术
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DOI
高影响因子
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