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Frontiers of Chemical Science and Engineering 2023年第7期17卷 918-929页

作者： Rui Cui Dongnv Jin Gaojie Jiao Zhendong Liu Jiliang Ma Runcang Sun Liaoning Key Lab of Lignocellulose Chemistry and Biomaterials Liaoning Collaborative Innovation Center for Lignocellulosic BiorefineryCollege of Light Industry and Chemical EngineeringDalian Polytechnic UniversityDalian 116034China

The casual discharge of dyes from industrial settings has seriously polluted global water *** to the abundance of biomass resources,preparing photocatalysts for photocatalytic degradation of dyes is significant;however,it still remains *** this work,a cuprous oxide/copper oxide composite was interpenetrated onto carbon nanosheets of cellulose-based flexible carbon aerogels(Cu_(2)O/CuO@CAx)via a simple freeze-drying-calcination *** introduction of the carbon aerogel effectively prevents the aggregation of the cuprous oxide/copper oxide *** addition,Cu_(2)O/CuO@CA0.2 has a larger specific surface area,stronger charge transfer capacity,and lower recombination rate of photogenerated carriers than copper ***,Cu_(2)O/CuO@CA0.2 exhibited high photocatalytic activity in decomposing methylene blue,with a degradation rate reaching up to 99.09% in 60 *** active oxidation species in the photocatalytic degradation process were systematically investigated by electron spin resonance characterization and poisoning experiments,among which singlet oxygen played a major *** conclusion,this work provides an effective method for preparing photocatalysts using biomass resources in combination with different metal *** also promotes the development of photocatalytic degradation of dyes.

关键词： carbon aerogel photocatalysis dye degradation biomass cuprous oxide copper oxide

Clean production of lactic acid by selective carbon-carbon bond cleavage of biomass feedstock over a novel carbon-bismuth oxychloride photocatalyst

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Frontiers of Chemical Science and Engineering 2024年第2期18卷 69-81页

作者： Zulfiqar Ali Jiliang Ma Dongnv Jin Rui Cui Runcang Sun Liaoning Key Lab of Lignocellulose Chemistry and Biomaterials Liaoning Collaborative Innovation Center for Lignocellulosic BiorefineryCollege of Light Industry and Chemical EngineeringDalian Polytechnic UniversityDalian 116034China

The use of functional materials such as carbon-bismuth oxyhalides in integrated photorefineries for the clean production of fine chemicals requires restructuring.A facile biomass-assisted solvothermal fabrication of carbon/bismuth oxychloride nanocomposites(C/BiOCl)was achieved at various *** with BiOCl and C/BiOCl-120,C/BiOCl-180 exhibited higher crystallinity,wider visible light absorption,and a faster migration/separation rate of photoinduced *** the selective C–C bond cleavage of biomass-based feedstocks photocatalyzed by C/BiOCl-180,the xylose conversion and lactic acid yield were 100%and 92.5%,respectively.C/BiOCl-180 efficiently converted different biomass-based monosaccharides to lactic acid,and the efficiency of pentoses was higher than that of ***,lactic acid synthesis was favored by all active radicals including superoxide ion(·O_(2)^(−)),holes(h^(+)),hydroxyl radical(·OH),and singlet oxygen(^(1)O_(2)),with·O_(2)^(−)playing a key *** fabricated photocatalyst was stable,economical,and *** use of biomass-derived monosaccharides for the clean production of lactic acid via the C/BiOCl-180 photocatalyst has opened new research horizons for the investigation and application of C–C bond cleavage in biomass-based feedstocks.

关键词： carbon-carbon bond cleavage biomass reforming C/BiOCl lactic acid photocatalysis

Peptidoglycan Recycling in Pseudomonas aeruginosa

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Peptidoglycan Recycling in Pseudomonas aeruginosa

Recent antibacterial agents from biomass derivatives:Characteristics and applications

中国化学会第三届全国糖化学会议

作者： Shaomin Yan Guang Wu National Engineering research center for Non-Food biorefinery State Key Laboratory of Non-Food Biomass and Enzyme TechnologyGuangxi Key Laboratory of Bio-refineryGuangxi Biomass Engineering Technology Research CenterGuangxi Academy of Sciences

Pseudomonas aeruginosa is an aggressive and opportunistic Gram-negative pathogen and can cause diseases in plants,animals and humans [1].However,drug resistance in *** becomes a great clinical concern,because the AmpC β-lactamase in *** can catalyze the hydrolytic destruction of the β-lactam core in β-lactam antibiotics,thus prevents theβ-lactam antibiotic from reaching the penicillin-binding protein enzymes,which synthesize and maintain the peptidoglycan polymer of the bacterial cell wall [2,3].Peptidoglycan is an important component in bacterial cell wall,and its recycling is closely related to AmpC and AmpR,even AmpD,AmpG and AmpP [4].In this mini-review,we summarize the relationships in peptidoglycan recycling in ***,which can give new insight into the drug resistance in ***.

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Journal of Bioresources and Bioproducts 2024年第3期9卷 283-309页

作者： Nissa Nurfajrin Solihat Alif Faturahman Hidayat R.A.Ilyas Senthil Muthu Kumar Thiagamani Nur Izyan Wan Azeele Fahriya Puspita Sari Maya Ismayati Mohammad Irfan Bakshi Zaharaddeen N.Garba M.Hazwan Hussin Witta Kartika Restu Wasrin Syafii Harits Atika Ariyanta Widya Fatriasari research center for biomass and Bioproducts National Research and Innovation Agency(BRIN)Kawasan KST SoekarnoJl Raya Bogor KM 46 Cibinong Bogor 16911Indonesia Department of Bioproducts and Biosystems School of Chemical EngineeringAalto UniversityEspoo 16300Finland Department of Chemical Engineering Faculty of Chemical and Energy EngineeringUniversiti Teknologi MalaysiaJohor 81310Malaysia Centre for Advanced Composite Materials Universiti Teknologi MalaysiaJohor 81310Malaysia Institute of Tropical Forestry and Forest Products Universiti Putra MalaysiaSerdang 43400Malaysia Centre of Excellence for biomass Utilization Universiti Malaysia PerlisPerlis 02600Malaysia Department of Mechanical Engineering Kalasalingam Academy of Research and EducationKrishnankoil 626126India Institute of Bioproduct Development(IBD) Universiti Teknologi MalaysiaJohor 81310Malaysia Department of Chemistry Ahmadu Bello UniversityZaria 810211Nigeria Materials Technology research Group(MaTReC) School of Chemical SciencesUniversiti Sains MalaysiaMinden 11800Malaysia research center for Chemistry National Research and Innovation Agency(BRIN)Kawasan Puspiptek SerpongSouth Tangerang 15314Indonesia Department of Forest Products Faculty of Forestry and EnvironmentIPB UniversityBogor 16680Indonesia Department of Pharmacy Gunadarma UniversityDepok 16424Indonesia research collaboration center of biomass-Based Nano Cosmetic In collaboration with National Research and Innovation Agency(BRIN)SamarindaEast KalimantanIndonesia

Enhancing awareness of personal cleanliness and antibacterial resistance has intensified the antibacterial substance request on consumable products. Antibacterial agents that have been commercialized nowadays are produced from inorganic and non-renewable substances. This provides several drawbacks, particularly against health and environmental issues. Therefore, many scientists work on substituting fossil-fuel-based antibacterial agents with natural ones such as from biomass. biomass derivatives, natural abundances of biopolymers in the world, amount to major compounds including polysaccharides (cellulose, hemicellulose, and chitosan) and polyphenol (tannin and lignin) substances which are capable to combat the growth of Gram-positive bacteria and Gram-negative bacteria. To date, no report focuses on a deep understanding of antibacterial properties derived from biomass and the internal and external factors effects. This work provides that gap because comprehensive knowledge is necessary before applying biomass to the products. The potency of biomass derivatives as antibacterial additives is also summarized. Basic knowledge of antibacterial characteristics to the application in products is highlighted in this review. Besides, the discussion about challenges and future perspectives is also delivered.

关键词： Antibacterial Application biomass derivatives Challenge Future perspectives

Chemically Modified Lignin:Correlation between Structure and Biodegradability

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Journal of Renewable Materials 2021年第12期9卷 2119-2128页

作者： Meifeng Wang Wubliker Dessie Hui Li Key Laboratory of Biomaterials of Guangdong Higher Education Institutes Guangdong Provincial Engineering and Technological Research Center for Drug Carrier DevelopmentDepartment of Biomedical EngineeringJinan UniversityGuangzhouChina Hunan Engineering Technology research center for Comprehensive Development and Utilization of biomass Resources Hunan University of Science and EngineeringYongzhouChina

Lignin is the most abundant heteropolymer based on aromatic subunits in *** quantities of lignin are annually produced from pulping processes and biorefinery *** unclearly defined structure and difficult biodegradation mainly limit its *** work focused on the effect of hydroxylation of lignin on its microbial *** carbonyl-modified lignin,and hydroxylated-lignin were synthesized with di-tert-butyl dicarbonate and hydrogen peroxide,respectively,using lignin as raw *** degradation of the modifiedlignins both by *** and *** were analyzed using UV-vis *** revealed that the lignin degradation velocity raises with the increase hydroxylation level of ***,FTIR and 1H NMR analysis of the biodegradation products of lignin further indicated that higher content of hydroxyl groups in lignin facilitated the demethylation combined with the aromatic ring cracking in the presence of fungus and bacteria.

关键词： Lignin modification biodegradation degradation mechanism

Spontaneous Unfolding and Refolding of Plantaricin α-Helix in Molecular Dynamics Simulation

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Computational Molecular Bioscience 2019年第1期9卷 27-39页

作者： Shaomin Yan Guang Wu State Key Laboratory of Non-Food biomass and Enzyme Technology National Engineering Research Center for Non-Food Biorefinery Guangxi Key Laboratory of Bio-Refinery Guangxi Academy of Sciences Nanning China

Antimicrobial peptides are promising therapeutic agents in view of increasing resistance to conventional antibiotics. Antimicrobial peptides usually fold in α-helical, β-sheet, and extended/random-coil structures. The α-helical antimicrobial peptides are often unstructured in aqueous solution but become structured on bacterial membrane. The α-helical structure allows the partitioning into bacterial membrane. Therefore it is important to understand the mechanism of unfolding and refolding of α-helical structure in antimicrobial peptides. It is not very easy to obverse and study the process of unfolding and refolding of α-helical antimicrobial peptides because of their rapidity. Therefore, molecular simulation provides a way to observe and explain this phenomenon. Plantaricin A is a 26 amino-acid antimicrobial pheromone peptide and can spontaneously unfold and refold under physiological condition. This study demonstrated the unfolding and refolding of plantaricin A by means of molecular simulation, and its mechanism was discussed with its implication to the Levinthal paradox.

关键词： Alpha-Helix Antimicrobial Peptides Protein Folding Plantaricin A

Mutation Patterns in Lysostaphin

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Journal of Biomedical Science and Engineering 2019年第6期12卷 322-332页

作者： Chunhong Zhang Weisheng Ye Shaomin Yan Guang Wu Department of Spinal Surgery IV Tianjin Hospital Tianjin China Department of Orthopedic Trauma Tianjin Hospital Tianjin China State Key Laboratory of Non-Food biomass Enzyme Technology Guangxi Key Laboratory of Biorefinery National Engineering Research Center for Non-Food Biorefinery Guangxi Academy of Sciences Nanning China

Lysostaphin is widely used in clinical settings against Staphylococcus aureus, but its mutants can abolish its killing activity. The difficulty in studies of mutations in lysostaphin is the shortage of data, which may need many decades to collect, although lysostaphin is so important for clinical therapeutics and drug development. In order not to passively wait for the accumulation of new data, in this study 1) the 23,442 mutations in 1408 proteins from databank were used to determine whether the mutations in lysostaphin follow the general mutation trend obtained from the databank, 2) the amino-acid pair predictability was used to explore the underlined mechanism for lysostaphin mutations, and 3) the amino-acid distribution probability was used to associate the mutation with dysfunction of lysostaphin. The results show that the mutations in lysostaphin follow the general trend of mutations in proteins;the underlined mechanism for mutations in lysostaphin is explainable from a viewpoint of randomness, and a mutation with increased distribution probability would have a larger chance to dysfunction lysostaphin. This study provides useful information for future design of anti-S. aureus drug and enzyme engineering.

关键词： Amino-Acid Pair Distribution Probability Lysostaphin Mutation Pattern Predictability

NMR diffusion analysis of catalytic conversion mixtures from lignocellulose biomass using PSYCHE-iDOSY

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Green Energy & Environment 2023年第5期8卷 1409-1416页

作者： Qi Zhao Christian Marcus Pedersen Jiamin Wang Rui Liu Yuanli Zhang Xiuyin Yan Zhenzhou Zhang Xianglin Hou Yingxiong Wang Shanxi Engineering research center of biorefinery Institute of Coal ChemistryChinese Academy of Sciences27 South Taoyuan RoadTaiyuan030001China center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing100049China Department of Chemistry University of CopenhagenUniversitetsparken 5DK-2100CopenhagenDenmark School of Chemical Engineering Zhengzhou University Zhengzhou450001China Shanxi Inspection and Testing center 106 Changzhi RoadTaiyuan030012China

The component analysis and structure characterization of complex mixtures of biomass conversion remain a challenging ***,developing effective and easy to use techniques is ***-ordered NMR spectroscopy(DOSY)is a non-selective and non-invasive method capable of achieving pseudo-separation and structure assignments of individual compounds from biomass mixtures by providing diffusion coefficients(D)of the ***,the conventional 1H DOSY NMR is limited by crowded resonances when analyzing complex mixtures containing similar chemical structure resulting in similar *** we describe the application of an advanced diffusion NMR method,Pure Shift Yielded by CHirp Excitation DOSY(PSYCHE-iDOSY),which can record high-resolution signal diffusion spectra efficiently separating compounds in model and genuine mixture samples from cellulose,hemicellulose and *** sets of isomers(D-glucose/D-fructose/D-mannose and 1,2-/1,5-pentadiol),homologous compounds(ethylene glycol and 1,2-propylene glycol),model compounds of lignin,and a genuine reaction system(furfuryl alcohol hydrogenolysis with ring opening)were successfully separated in the diffusion *** results show that the ultrahigh-resolution DOSY technique is capable of detecting and pseudo-separating the mixture components of C_(5)/C_(6) sugar conversion products and its derivative hydrogenation/hydrogenolysis from lignocellulose biomass.

关键词： Diffusion NMR Pure shift spectroscopy PSYCHE-iDOSY Mixture analysis biomass

Thermal Unfolding of a Novel Alkalitolerant α-Amylase from the Anoxybacillus Species

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Thermal Unfolding of a Novel Alkalitolerant α-Amylase from ...

Isolating,screening and biochemical characterization of a novel thermal Fungal polygalacturonase from Penicillium oxalicum

The Ninth National Symposium on Enzyme Engineering

作者： Si-Ming Liao Nai-Kun Shen Hai-Yu Liu Qing-Yan Wang Liang Sun Ri-Bo Huang Life Science and Technology College Guangxi University State Key Laboratory of Non-food biomass Energy and Enzyme Technology National Engineering Research Center for Non-food BiorefineryGuangxi Academy of Sciences Guangxi Mangrove research center

The gene(JF946749)that encodeα-amylase from the Anoxybacillus species was distinct from other well-knownα-*** removal of the signal tide,the gene was cloned in pQE30a(QIAGEN).*** XLl-blue(QIAGEN)and *** M15(QIAGEN)were used as the hosts for cloning and expression,*** protein was purified by Ni-NTA affinity chromatography followed by size-exclusion chromatography using a Superdex 75 column equilibrated with 50mM Tris,pH8.0,0.15M NaC1 on the Akta purifier system(GE Healthcare).And then the purified protein was desalted through a G-25 column with 50mM Tris-HC1,*** protein concentration was determined using a 2000e Nanodrop spectrophotometer(Thermo)and also according to the method of Bradford using bovine serum albumin as the *** or-amylase exhibited an optimum activity at 60℃and pH 8.0 and the activity half life(t)at 65℃was approximately 85 *** melting temperature(Tm)is a better indicator of stability and that resistance to aggregation once unfolding has *** explore the thermostability of theα-amylase,CD measurements were performed to monitor the thermal unfolding using a Chirascan instrument(Applied Photophysics).Theα-amylase was dissolved to 0.2mg/ml in 5mM Tris-HC1(pH8.0)and degassed with a Microcal thermovac instrument(GE Healthcare).Hellma quartz cuvettes with a path length of 0.1 cm were *** CD spectra from 180 nm to 260 nm in 1 nm steps with an averaging time of ls were *** temperature range was from 45℃to 85℃with a temperature ramp rate of 0.5℃/*** sample temperature was measured directly using an external probe immersed in the *** the temperature was recorded for each discrete CD measurement,the same raw data set could be shown as a set of continuous-temperature ramping curves at each *** the multi-wavelength thermal data could also be analyzed globally to obtain mid-point temperatures and thermodynamic characteristics using Global 3 analysis software(Applied P

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Isolating,screening and biochemical characterization of a no...