Welcome to Chemistry and Industry of Forest Products,
30 Most Down Articles
Published in last 1 year | In last 2 years| In last 3 years| All| Most Downloaded in Recent Month| Most Downloaded in Recent Year|

Most Downloaded in Recent Month
Please wait a minute...
For Selected: Toggle Thumbnails
Research Progress in Screening and Bioactivity of Terpenoid Botanical Pesticides
Shichao XU,Huanhuan DONG,Xiaojing ZENG,Zhendong ZHAO
Chemistry and Industry of Forest Products    2019, 39 (1): 1-12.   DOI: 10.3969/j.issn.0253-2417.2019.01.001
Abstract709)   HTML2334)    PDF(pc) (1388KB)(706)       Save

This paper reviewed the research progress of screening and activity evaluation of terpenoid botanical pesticides in recent 20 years at home and abroad including the perspective of the antifeedant, repellent, poisonous activities and growth regulation of terpene type insecticides, the inhibition of terpene type antibacterial agents, phytopathogens and the activity of terpene type herbicides in the inhibition of seed germination and seedling growth. The investigation and application of agriculture active terpenoid botanical compounds were systematically introduced and summarized. Based on the existing problems in relevant research fields, the development prospects for the screening and application of terpenoid botanical pesticides was forecasted. This review will provide guidance for the synthesis and application of high-active terpenoid botanical pesticides and devote deeply to the exploitation and utilization of terpenoid resources.

Table and Figures | Reference | Related Articles | Metrics
Study on Preparation of β-Glucosidase and Its Application in Enzymatic Hydrolysis of Cellulose
QU Li-li;ZHU Jun-jun;LIU Min;YONG Qiang;YU Shi-yuan
   2009, 29 (1): 13-17.  
Abstract464)      PDF(pc) (992KB)(743)       Save
Preparation of β-glucosidase by solid-state fermentation and its application in enzymatic hydrolysis of cellulose were investigated. The maximal β-glucosidase activity was 225.43IU/g dry base (based on koji) when Aspergillus niger NL02 was employed using corn cob and wheat bran as carbon sources for 5 days cultivation. β-Glucosidase was purified to homogeneity by ammonium sulfate precipitation, anion-exchange chromatography and gel filtration chromatography. The recovery of enzyme acti-vity and specific activity were 69.34% and 133.88IU/mg, respectively. Corn stalk pretreated by dilute sulfuric acid was hydrolyzed by the dosages of 20FPIU/g (based on cellulose) Trichoderma reesei cellulase and 4IU/g(based on cellulose) β-glucosidase at the substrate concentration of 100g/L for 48h, the concentration of cellobiose and glucose in hydrolysate were 1.12 and 42.68g/L, respectively, the yield of enzymatic hydrolysis and the ratio of fermentable sugar were 62.85% and 97.44%, respectively.
Related Articles | Metrics
Preparation and Electrochemical Properties of Tannic Acid Doped Polypyrrole/Cellulose Flexible Supercapacitors
Fangfang SHI, Limin ZANG, Jingyu ZHANG, Jinze WU, Jianhui QIU, Chao YANG
Chemistry and Industry of Forest Products    2022, 42 (6): 99-107.   DOI: 10.3969/j.issn.0253-2417.2022.06.014
Abstract19)   HTML3)    PDF(pc) (6616KB)(59)       Save

Tannic acid(TA) doped polypyrrole(PPy)/cellulose(XWS)(TA/PPy/XWS) supercapacitors electrodes materials were prepared via in situ polymerization on the surface of cellulose, in which TA was used as the electroactive dopant. The effects of each component in the electrodes and the cellulose content on the electrochemical performance of the electrodes were investigated. The results showed that TA could provide pseudocapacitance through reversible redox reaction, which could enhance the specific capacitance of the electrode material. The TA doped PPy particles were coated on the surface of the cellulose, which could expose more active sites to further improve the electrochemical performance of the electrodes. With the increasing cellulose content, the specific capacitance of the electrode increased at first and then decreased. The maximum specific capacitance of the prepared TA/PPy/XWS-30 electrode reached 340.7 F/g at a current density of 0.5 A/g. TA/PPy/XWS-30 was then coated on the filter paper by screen printing to assemble the flexible supercapacitor. The maximum specific capacitance, energy density and power density of the supercapacitor were 90.7 F/g, 8.1 W·h/kg and 705.8 W/kg, respectively. The capacitance retention rate was 73.8% after 5 000 charge-discharge cycles. Besides, the capacitance retention rate remains at 86.4% after 2 500 bending cycles at 180°, which exhibits excellent flexibility and charge-discharge cycling stability. The corresponding performance of the series and parallel connection and instance of lighting an electronic watch demonstrates that the supercapacitor has a good application prospect.

Table and Figures | Reference | Related Articles | Metrics
Research Progress of Resource Distribution of Bioactive Compound Ursolic Acid
TAO Yuan-bo;XING Ya-li;FANG Zhi-juan;BI Liang-wu;ZHAO Zhen-dong
   2012, 32 (1): 119-126.  
Abstract755)      PDF(pc) (1060KB)(865)       Save
The general survey, species distribution and distribution differences of ursolic acid plant resources were reviewed. Ursolic acid was widely distributed in plants, richly in Greek sage, oleander, rosemary, Spanish sage, periwinkle, Nepeta faassenii Berg., Ocimum tenuiflorum, spike lavender, thyme, winter savory, broadleaf holly leaf, loquat, horny holly, spreading hedyotis and cherry laurel. Their ursolic acid contents were 74.50, 43.00, 41.00, 40.20, 37.00, 29.20, 20.20, 19.00, 18.80, 17.70, 16.00, 12.30, 10.60, 10.07 and 10.00 mg/g respectively. Ursolic acid was mainly present in tea trees, fruit trees, medicinal plants, spice plants and other plants such as paulownia. The distribution of ursolic acid also had breed difference, plant parts difference, region difference, season difference, growth condition difference, etc. The full understanding of ursolic acid plant resource distribution would provide material basis for sustainable research and development, high-valued and scaled-up use of bioactive compound ursolic acid.
Related Articles | Metrics
Research Progress in Biosynthesis of Anthocyanins
Qian XU,Chen ZHANG,Jiawei WU,Jia OUYANG
Chemistry and Industry of Forest Products    2020, 40 (3): 1-11.   DOI: 10.3969/j.issn.0253-2417.2020.03.001
Abstract1833)   HTML1967700927)    PDF(pc) (3662KB)(831)       Save

Anthocyanin is a kind of flavonoid which mainly exists in plants. It has strong biological activities such as anti-cancer and anti-oxidation, and is widely used in the field of nutrition and health care. Most anthocyanins are extracted directly from plants by physical or chemical means, but the yield is low, and the extracted anthocyanins are mostly mixtures due to the restrictions of time, region and season. Biosynthesis of anthocyanins have attracted much attention by researchers worldwide in recent years. As the biosynthesis of anthocyanins can be controlled artificially and the purity of the obtained products is high, it has been widely studied. Anthocyanins cannot exist stably in the environment, and need to be modified by glycosylation, acylation and methylation to increase their stability. The modified anthocyanins can be synthesized by microorganisms and significant color changes can be seen in the medium. The biosynthesis and modification of anthocyanins were reviewed in this paper, and the preparation technology of anthocyanin synthesis from plants and microorganisms was briefly introduced, the factors affecting anthocyanin synthesis were analyzed, and finally the future research direction of anthocyanin was predicted.

Table and Figures | Reference | Related Articles | Metrics
Recent Progress in Preparation and Application of Bio-based Hydrogels
Shuo WANG, Yonggui WANG, Zefang XIAO, Yanjun XIE
Chemistry and Industry of Forest Products    2022, 42 (5): 122-136.   DOI: 10.3969/j.issn.0253-2417.2022.05.017
Abstract114)   HTML117)    PDF(pc) (4081KB)(189)       Save

Firstly, this review introduced the research background and application status of bio-based hydrogels. According to the different crosslinking mechanisms, physical and chemical hydrogels were classified and described. Then, the hydrogels prepared from cellulose, chitosan, protein and other bio-based materials were summarized based on the classification of the used biomass, including the solvents system of cellulose, the preparation of cellulose-based hydrogels and modification of cellulose derivatization. Also, the feedstock sources and modification methods of chitosan-based hydrogels, as well as cross-linking mechanisms such as electrostatic interaction and imine bond formed by amine groups on their molecular chains were assembled. Protein-based hydrogels with good biocompatibility and bioactivity, formed by β-folded self-assembly of polypeptide chains were depicted as well in this review. Similarly, bio-based hydrogels prepared by using physical or chemical crosslinking of hydrophilic natural polymers such as starch, sodium alginate and carrageenan, were introduced respectively. At the same time, the main applications of functionalized bio-based hydrogels in the biomedical fields were described in detail, including drug sustained release, targeted delivery, cell media, tissue repair scaffolds, wound dressings, etc. In addition, the application and research progress of bio-based hydrogels as adsorbent materials in environmental field were reviewed, and their applications in packaging, sensing, photoelectric catalysis and other fields were also highlighted. Finally, the development opportunities and challenges of bio-based hydrogels were summarized, and the future research directions were prospected.

Table and Figures | Reference | Related Articles | Metrics
Separation and Identification of Aqueous Extracts of Cinnamomum longe- paniculatum Leaves and Their Anti-hepatocellular-cancer Activity
Wenjuan ZHOU, Yuanwang QIU, Jiayan BEI, Yuzhou WANG, Shiqi RUAN, Lin NI
Chemistry and Industry of Forest Products    2022, 42 (6): 1-10.   DOI: 10.3969/j.issn.0253-2417.2022.06.001
Abstract24)   HTML6)    PDF(pc) (699KB)(51)       Save

This chemical constituents of the aqueous extract of leaves of Cinnamomum longepaniculatum(Gamble) N. Chao ex H.W.Li were studied. Twenty-four compounds were isolated and purified by macroporous resin, PRP-512A resin, Sephadex LH-20, and etc. The structures of the compounds were identified by spectroscopic methods of UV, MS and NMR as 7-hydroxy-6-methoxy-coumarin(1), isofraxidin(2), dimethylmatairesinol(3), (+)-episesaminone(4), horsfieldin(5), (+)-epipinoresinol(6), (+)-pinoresinol(7), (+)-pinoresinol monomethyl ether(8), (+)-de-O-methylmagnolin(9), phillyrin(10), (2R, 3S)-4'-hydroxy-5, 7, 3'-trimethoxyflavan-3-ol(11), (2S, 3S)-4'-hydroxy-5, 7, 3'-trimethoxyflavan-3-ol(12), quercetin(13), loliolide(14), 2, 6-dimethoxy-1, 4-benzoquinone(15), pyrocatechol(16), vanillic acid(17), 3-methoxy-4-hydroxyphenylethanol(18), dihydroconifery alcohol(19), 3, 5-dimethoxy-4-hedroxyphenylpropynol(20), 2-hydroxy-1-(4-hydroxy-3, 5-dimethoxyphenyl)propan-1-one(21), methyl syringate(22), 1-(4-ethylphenyl)-1, 2-ethanediol(23), p-hydroxyacetophenone(24). Compounds 2, 5-6, 9-12, 14-16 and 18-24 were all isolated from Cinnamomum for the first time. The results of anti-hepatocellular-activity showed that compounds 2, 5 and 13 had moderate inhibitory activity effects on human liver cancer(HepG2) cells, with the half inhibitory concentrations(IC50) values of 33.43, 107.40, and 71.43 μmol/L, respectively. Among them, the anti-hepatocellular-activity of compound 5 was reported for the first time. Compounds 2 and 13 belong to coumarins and flavonoids, which have good application prospects in the research of anti-tumor drugs.

Table and Figures | Reference | Related Articles | Metrics
PROSPECT ON RESEARCH AND DEVELOPMENT OF BIOMASS ENERGY UTILIZATION
JIANG Jian-chun
   2002, 22 (2): 75-80.  
Abstract1395)      PDF(pc) (619KB)(5064)       Save
Biomass energy is an important part of renewable energy.High effective utilization and development of biomass energy has positive effects on solving energy and environment problems.Since 1970's,in countries worldwide,especially in advanced countries,extra attentions have been paid to conduct researches on the application technique of biomass energy and a lot of research progress have been achieved,some of which have been used in industrial scale.In this paper,the progress of research and development in domestic and abroad,concerning biomass solidification,liquefaction,gasification and direct combustion technique,are summarized.According to our country's situation,proposals on research and development prospect are put forward.
Related Articles | Metrics
Catalytic Hydrogenation of 5-Hydroxymethyl-furfural into 2, 5-Bishydroxymethylfuran
Tian GAN, Kaili ZHANG, Ke YE, Ying LIU, Shubin WU, Junping ZHUANG
Chemistry and Industry of Forest Products    2022, 42 (6): 24-30.   DOI: 10.3969/j.issn.0253-2417.2022.06.004
Abstract27)   HTML1)    PDF(pc) (4792KB)(50)       Save

The catalytic hydrogenation of 5-hydroxymethylfurfural(HMF) for preparation of 2, 5-bishydroxymethylfuran(BHMF) was studied, using ethanol as hydrogen donor and solvent, and copper and zinc nanoparticles(Cu-Zn/CBD) supported by carbonized sugarcane bagasse(CBD) was used as catalyst. The effects of reaction parameters such as catalyst metal proportion, reaction temperature and reaction time on the reaction of HMF hydrogenation were investigated. The surface morphology and structure of the catalyst were characterized by XRD, SEM and TEM. The elemental valence and content of the catalyst were analyzed by XPS and ICP-OES, and mixture after reaction was analyzed by HPLC. The results showed that the bimetallic Cu-Zn/CBD catalyst exhibited higher catalytic activity than those of single metal catalyst Cu/CBD and Zn/CBD. Under the optimal conditions of the Cu/Zn mass ratio of 2∶1, the reaction temperature of 160 ℃, and the reaction time of 1.5 h, the conversion rate of HMF was 86.5%, and the yield of BHMF was 82.5%. The reusability of catalysts was excellent. After recycling for 5 times, owing to the loss of a small amount of Cu and Zn nanoparticles, the conversion rate HMF and yield of BHMF decreased to 77.3% and 76.8%, respectively.

Table and Figures | Reference | Related Articles | Metrics
Preparation and Properties of Lignocellulosic Nanofibrils Obtained by Polycarboxylic Acid Pretreatments
Huiyang BIAN, Sheng DUAN, Jin WU, Liulian HUANG, Shuangquan YAO, Hongqi DAI
Chemistry and Industry of Forest Products    2022, 42 (6): 11-16.   DOI: 10.3969/j.issn.0253-2417.2022.06.002
Abstract22)   HTML1)    PDF(pc) (4434KB)(49)       Save

Three kinds of lignocellulosic nanofibrils(LCNF) were prepared from miscanthus straw fiber with the treatment using oxalic acid, maleic acid and citric acid under the condition of high-pressure homogenization. The performances of LCNF were characterized by cold field emission scanning electron microscope(FE-SEM), transmission scanning electron microscope(TEM), X-ray diffraction(XRD) analyzer and thermogravimetric(TG) analyzer. The results showed that polycarboxylic acid pretreatment effectively promoted fiber swelling and weaken the bonding force between fibrils, which was beneficial for the dissociation of microfibrils during the high-pressure homogenization process. The acidity became stronger and the fiber hydrolyzed in the pretreatment process was more intensive when the pKa value of carboxylic acid was smaller, resulting in more uniform size of LCNF. Oxalic acid had the minimum pKa value of 1.25 among there polycarboxylic acids, and the minimum average width of the corresponding prepared LCNF was approximately 15.3 nm. Compared with the raw material of miscanthus straw fiber, high-pressure homogenization could weaken the hydrogen bond occurring in microfibrils, which destroyed partial crystalline area and decreased the crystallinity of LCNF. The crystallinity of O-LCNF, M-LCNF and C-LCNF prepared from oxalic acid, maleic acid and citric acid system was 50.4%, 48.2% and 50.0%, respectively. Under the oxalic acid pretreatment system, the obtained(O-LCNF) exhibited the best thermal stability with the maximum weight loss rate temperature of 353.2 ℃.

Table and Figures | Reference | Related Articles | Metrics
PROGRESS ON PREPARATION OF SUPERABSORBENTS FROM CELLULOSE
LI Jian-fa;SONG Zhan-qian
   2002, 22 (2): 81-85.  
Abstract794)      PDF(pc) (461KB)(2225)       Save
This paper reviews the progress of research and development on superabsorbents from cellulose.With different chemical modification methods such as etherification and graft copolymerization,cellulose derivatives have various water absorbence of 10-3 000 times difference,while graft copolymerization is the most effective method.Recent trends on preparing cellulose-based superabsorbents were evaluated,such as cationic superabsorbent and bacteria cellulose.Applications of superabsorbents in agriculture and forestry were also summarized.
Related Articles | Metrics
Review on Research Progress and Development Trend of Activated Carbon at Home and Abroad
SUN Kang;JIANG Jian-chun
   2009, 29 (6): 98-104.  
Abstract958)      PDF(pc) (1351KB)(2161)       Save
The progress of technical studies on activated carbon production at home and abroad in recent years were introduced, such as pollution-free, low active agent consumption, pre-treatment, catalytic activation, template manufacture and physical-chemical united techniques. Meanwhile, the progress was discussed in researching the application technology of activated carbon, such as hydrogen preservation, natural gas peak load regulation, VOC recovery, oxygen-enrichment, photo-catalysis, temperature controlling, flowers fresh-keeping, soil improving, fuel cell electrodes, as well as regeneration of saturatedly adsorbed activated carbon. The existing problems and future trends of production and application technology of activated carbon were also discussed.
Related Articles | Metrics
Identification of Chemical Structure of Urushiol from Maoba Lacquer by HPLC-MS
HE Yuan-feng;WANG Cheng-zhang;LU Rong
   2012, 32 (6): 47-51.  
Abstract857)      PDF(pc) (1083KB)(894)       Save
Middle pressure chromatography was used to purify urushiol. Its purity reached above 90%. HPLC,HPLC-MS,MS was applied to analyze urushiol that was extracted from Maoba lacquer. HPLC was performed under a methanol-water system(volume ratio) with a flow rate of 1mL/min. Eighteen peaks appeared under UV detector of 210 nm. Thirteen compounds were separated by HPLC-MS, mainly contained C15/17 with different degrees of unsaturation. The middle pressure chromatography and HPLC could be used as a efficient preparation and analysis method.
Related Articles | Metrics
国家自然科学基金(50776035);教育部重大项目培育资金(705048);长江学者和创新团队计划 (IRT0552);国家 "863"计划(2007AA05Z408);国家自然科学基金-广东自然科学基金联合基金重点项目(U0733001)
ZHANG Jing-qiang;LIN Lu;SUN Yong;MITCHELL G;LIU Shi-jie
   2008, 28 (6): 109-114.  
Abstract822)      PDF(pc) (1184KB)(2391)       Save
The enormous hydrogen bondings and crystal structures of natural cellulose strongly retard the hydrolysis of native cellulose into soluble sugars, which can be converted into biofuels or high value chemical products. In this paper, recent researches on cellulose structure & hydrogen bonding, as well as some promising methods and theories of decrystallization, and applicational examples were described.
Related Articles | Metrics
Review on Preparation Technology of Activated Carbon and Its Application
JIANG Jianchun, SUN Kang
Chemistry and Industry of Forest Products    2017, 37 (1): 1-13.   DOI: 10.3969/j.issn.0253-2417.2017.01.001
Abstract1381)      PDF(pc) (2184KB)(1244)       Save
The domestic and international research progress of activated carbon production and application status in recent twenty years were reviewed. The development of chemical activation and physical activation of activated carbon were summarized, and the latest breakthrough on the integrated production process of physical and chemical activation was introduced. The pollution-free, low consumption and pretreatment production technology of activated carbon industrial production and the regeneration production technology of adsorption-saturated activated carbon were briefly described. Meanwhile, the research progresses of its application on gas adsorption, liquid adsorption and catalyst carrier were discussed, too. The existing problems of production and application technology of activated carbon were put forward, the development of activated carbon industry outlet and solutions were clarified, and the future research directions of activated carbon were further pointed out.
Reference | Related Articles | Metrics
Progress on Preparation and Application of 5-Hydroxymethylfurfural
Si LU,Qiong WANG,Xun LI,Wei QI,Zhongming WANG,Zhenhong YUAN
Chemistry and Industry of Forest Products    2019, 39 (1): 13-22.   DOI: 10.3969/j.issn.0253-2417.2019.01.002
Abstract1487)   HTML190584)    PDF(pc) (786KB)(993)       Save

5-Hydroxymethylfurfural (HMF) is one of the most important biomass-based platform molecules and widely used in the preparation of multifunctional compounds such as fine chemicals, key pharmaceutical intermediates, functional polyesters, solvents and liquid fuels. At present, the preparation of HMF is a hot spot in the field of biomass research, and the raw materials and methods for preparing HMF have been continuously expanded. This paper reviews the main preparation methods and research progress of HMF. Catalysis systems for HMF preparation is systematically described, including the types of the catalysts (mineral acids, ionic liquids, metal chlorides, solid acids and others) used in the catalytic process and the solvent systems. Then, the preparation paths and applications of important derivatives from HMF are summarized. Finally, suggestions for future research on HMF are provided based on the understanding of problems existing in the current research.

Table and Figures | Reference | Related Articles | Metrics
Preparation and Properties of Lignin-removed Woods/Poly(Methyl Methacrylate) Composites
Fucheng XU, Mei LI, Jianling XIA, Lina XU, Haiyang DING, Shouhai LI
Chemistry and Industry of Forest Products    2022, 42 (6): 17-23.   DOI: 10.3969/j.issn.0253-2417.2022.06.003
Abstract15)   HTML1)    PDF(pc) (524KB)(42)       Save

The delignified wood(DW) was impregnated by methyl methacrylate(MMA) to obtain lignin-removed wood/poly(methyl methacrylate)(DW/PMMA) composite material through in-situ polymerization. The properties of DW/PMMA composite materials were investigated. The results showed that the removal ratio of different lignin had a greater impact on the properties of wood, and the impact was more significant with the increasing removal ratio of lignin. The density of DW/PMMA composite was significantly higher than that of non-impregnated wood. Especially when the lignin removal ratio reached a high level(H-DW), the density of the composite material could reach 1.15 g/cm3, which was close to that of pure PMMA. Compared with DW, DW/PMMA had lower volumetric moisture absorption and water absorption expansion coefficient, and incremental volumetric expansion resistance, which indicated that the impregnation of MMA effectively improved the dimensional stability of DW. The DW/PMMA exhibited better mechanical property than that of the untreated wood/PMMA. Dynamic thermomechanical thermal analysis showed that the filling of PMMA effectively increased the rigidity of the prepared composite material.The DW/PMMA composites prepared in this study had excellent dimensional stability and mechanical properties. Among them, the bending strength of L-DW/PMMA impregnated with low lignin removal rate wood(L-DW) was 122.6 MPa, the bending modulus was 10 302.41 MPa, and the compression modulus was 5 492.14 MPa, which was more excellent than that of the untreated wood/PMMA.

Table and Figures | Reference | Related Articles | Metrics
Synthesis and Antioxidant Activity of 1, 2, 3, 5, 6, 7-Hexahydroxy-9, 10-Anthraquinone
Xiang LEI, Minfeng ZHANG, Kexin HU, Yu KE, Deyong ZHENG
Chemistry and Industry of Forest Products    2022, 42 (6): 64-68.   DOI: 10.3969/j.issn.0253-2417.2022.06.009
Abstract27)   HTML1)    PDF(pc) (564KB)(46)       Save

1, 2, 3, 5, 6, 7-hexahydroxy-9, 10-anthraquinone was synthesized by Friedel-Crafts acylation reaction using gallic acid as raw material and methanesulfonic acid as catalyst. The structure of the target product was verified by ultraviolet-visible(UV-vis) spectroscopy, Fourier transform infrared(FT-IR) spectroscopy, nuclear magnetic resonance(NMR) spectroscopy, and liquid chromatography-mass spectrometry(LC-MS) spectroscopy. The antioxidant activities in vitro of hexahydroxy-anthraquinone were evaluated in terms of its scavenging abilities on ABTS radical (ABTS+·), DPPH radical(DPPH·) and superoxide anion radical (O2-·). The results showed that the molar absorbance coefficient(ελmax) of 1, 2, 3, 5, 6, 7-hexahydroxy-9, 10-anthraquinone at the maximum absorption wavelength of 293 nm was 3.25×104 L/(cm·mol), which was two times higher than that of the commonly used UV absorber 4-methoxycinnamic acid-2-ethylhexyl ester(OMC), indicating that it was an excellent UV absorber in UVB band. The half-inhibitory concentrations(IC50) of hexahydroxy-anthraquinone for the scavenging of ABTS+·, DPPH·, and O2-· were 42.1, 39.4, and 30.8 μmol/L, respectively. The scavenging ability of it on ABTS+· and DPPH· was stronger than that of Vc, but weaker than that of gallic acid, and the scavenging ability of it on O2-· was stronger than those of Vc and gallic acid.

Table and Figures | Reference | Related Articles | Metrics
STRUCTURE AND THERMAL BEHAVIOR OF NATURAL BAMBOO FIBERS FOR TEXTILE PURPOSES
TANG Ren-cheng;YANG Xu-hong;WANG Hua-jie;MEI Shi-ying
   2004, 24 (1): 43-47.  
Abstract695)      PDF(pc) (677KB)(1314)       Save
The morphological,crystalline structure and thermal behavior of natural bamboo fibers for textile purposes were characterized by SEM,FT-IR,WAXD,TG and DSC analyses in comparison to cotton.Oblate pore space in the flat section of natural bamboo fibers and some aperture in their surface layer were observed,but no sheath-core structure was found in their section.Our analysis data showed that the procedure of extracting bamboo fibers from bamboo did not change the crystalline feature(celluloseⅠ) of bamboo fibers,but their degree of crystallization from WAXD and crystallinity index from FT-IR were higher than those of cotton.Thermal stability property and decomposition mechanism of natural bamboo fibers were the same as those of cotton,whereas they exhibited slightly lower heat-(absorption) and heat-release than cotton when decomposed under nitrogen and air respectively due to the stronger (hydrogen) bonding interaction between their molecular chains.
Related Articles | Metrics
Synthesis and Antifungal/Anti-oomycete of Turpentine Based Derivatives
Xuan LI, Tingmin PAN, Yuanxiao GENG, Haiyu ZHOU, Jian LI, Yanqing GAO
Chemistry and Industry of Forest Products    2022, 42 (6): 39-46.   DOI: 10.3969/j.issn.0253-2417.2022.06.006
Abstract25)   HTML2)    PDF(pc) (3312KB)(45)       Save

Three pinene-based derivatives of dihydrocuminic amides compounds(5a-5g), dihydrocuminic oxime esters compounds(6a-6f) and dihydrocuminic acyl hydrazones compounds(8a-8f) were prepared from β-pinene. The structurs of the product were characterized by FT-IR, 1H NMR and MS. The bactericidal activities of the obtained compounds were investigated by mycelial growth rate method. The results showed that these 19 compounds had inhibitory effects on Valsa mali, Botrytis cinerea and Phytophthora capsici, where the inhibitory effect on V. mali was stronger. The half effective mass concentration(EC50) values of compounds 5a and 8e against V. mali were 10.489 and 10.810 mg/L, respectively. The results of preliminary structure-activity relationship showed that the introduction of electronegative functional groups such as halogen atoms, cyano groups and nitro groups to the compounds could significantly improve the antibacterial activity of the compounds. Among them, 5a and 8e could be used as lead compounds for further optimization study.

Table and Figures | Reference | Related Articles | Metrics
RESEARCH PROGRESS ON NATURAL RESOURCES AND APPLICATION OF THE BIOACTIVE SUBSTANCE——SQUALENE
ZHAO Zhen-dong;SUN Zhen
   2004, 24 (3): 107-112.  
Abstract830)      PDF(pc) (826KB)(3181)       Save
The sources and applications of the bioactive substance squalen that widely exists in animals and plants are reviewed.According to the citations,the most abundant sources of squalene in animals are deep-sea fishes,especially sharks,in which the highest content of squalene is approached to 69% based on liver oil.Amaranth seed oil,olive oil and palm oil are the major plant sources of squalene.The content of squalene is 5 %-8% in amaranth seed oil,and the highest content is 1.16% in olive oil.Because of the strong bioactivity,squalene is widely used in medical care fields and in cosmetics.Squalene is easy to oxidize,so it must be kept with suitable antioxidant during storage.
Related Articles | Metrics
Experimental Study of Tobacco Waste Pyrolysis in a Fluidized Bed Reactor
Jian JIANG, Anfu HU, Jun WANG, Guojun ZHOU, Yunchao LI, Kaige WANG, Shurong WANG
Chemistry and Industry of Forest Products    2022, 42 (6): 47-54.   DOI: 10.3969/j.issn.0253-2417.2022.06.007
Abstract16)   HTML3)    PDF(pc) (606KB)(44)       Save

In order to probe the high-value utilization of tobacco waste, the basic physicochemical properties of the feedstock as well as their thermal conversion characteristics were tested using TG, and Py-GC/MS, etc. Then, the pyrolysis experiment of tobacco waste was carried out in a fluidized bed reactor with a feeding rate of 10 kg/h. The results showed that tobacco waste had a very low bulk density and high porosity. The mass loss during tobacco pyrolysis was mainly occurred in the temperature range of 150-400 ℃, and the maximum rate of weight loss occurred near 180 and 315 ℃. The Py-GC/MS analysis of tobacco waste suggested that the bio-oil was mainly composed of nicotine, olefins, ketones, acids, aldehydes, alcohols, aromatics, phenols, pyridines and pyrroles. According to the pyrolysis experiment in the fluidized bed reactor, with the increase of pyrolysis temperature from 300 to 500 ℃, the yield of bio-oil reached its maximum of 32.58% at 450 ℃. The dominant compound in bio-oil was nicotine, followed by acids, ketones, phenols, and N-heterocyclic compounds. In addition, the gas yield increased gradually with the increasing temperature, which was mainly composed of CO2 and CO, while the yield of solid char residue decreased.

Table and Figures | Reference | Related Articles | Metrics
Degradation of Lignin to Phenolic Compounds by Polyacid/H 2O 2 System
Ningxin WEI, Xixin DUAN, Wenbiao XU, Junyou SHI
Chemistry and Industry of Forest Products    2022, 42 (6): 55-63.   DOI: 10.3969/j.issn.0253-2417.2022.06.008
Abstract14)   HTML1)    PDF(pc) (933KB)(44)       Save

The catalytic performance of four keggin-type polyoxometalates with different oxidability to degrade lignin into phenolic compounds in H2O2 system was compared. H3PW12O40 and H5PMo10V2O40 catalysts had good effect on the depolymerization of lignin. Under the conditions of 140 ℃, 1 mL H2O2, 1 h, the yield of bio-oil could reach 54.60% by using H3PW12O40 as catalyst, and the total yield of phenolic compounds could reach 6.38%. By using H5PMo10V2O40 as catalyst, the yield of bio-oil could reach 60.96% and the total yield of monophenol compounds could reach 11.67% at 140 ℃, 2 mL H2O2 and 1 h. Compared with HPW, PMo10V2 could significantly increase the yield of monophenols in H2O2 system due to its strong oxidizing ability. A series of characterizations such as FT-IR, 2D-HSQC, and GC-MS were performed to prove the effectiveness of the system in depolymerizing lignin into phenolic compounds.

Table and Figures | Reference | Related Articles | Metrics
Application of Deep Eutectic Solvents in Molecular Imprinting Separation Technology
Chunhui MA, Xiaojing WANG, Lihan SUN, Wei LI, Sha LUO, Shouxin LIU
Chemistry and Industry of Forest Products    2022, 42 (6): 123-135.   DOI: 10.3969/j.issn.0253-2417.2022.06.017
Abstract26)   HTML1)    PDF(pc) (2302KB)(44)       Save

Using the roles of deep eutectic solvents(DES) in the molecularly imprinted polymers(MIP) as the main line, the roles of different components of DES in the preparation process of MIP were summarized. DES was used as the template molecule to enhance its water solubility, and make the synthesized MIP with good selectivity. DES could be used as the functional monomer or auxiliary functional monomer to increase the binding site with template molecules and effectively improve the affinity of the target. As the pore-forming agent, DES could reduce environmental pollution and improve pore permeability. DES was used as eluent to realize the advantages of environmental friendliness and low cost separation. DES could also modify the support of imprinted molecules on the surface, so that the required functional groups could be obtained after the support surface was loaded with DES, which was conducive to the preparation of molecule-imprinted polymers and could improve the adsorption performance of molecule-imprinted polymers. Meanwhile, a theoretical basis and development direction for the application of DES in the future green separation of molecular imprinting technology(MIT) was prospected.

Table and Figures | Reference | Related Articles | Metrics
Research Progress on Olive Oil Secondary Metabolite of Oleocanthal
Wenjun LI, Chengzhang WANG, Jiandu LEI, Fengxia TANG, Dong PEI, Xiaobo SONG
Chemistry and Industry of Forest Products    2022, 42 (6): 136-146.   DOI: 10.3969/j.issn.0253-2417.2022.06.018
Abstract26)   HTML3)    PDF(pc) (838KB)(44)       Save

Oleocanthal(OC) is a secondary metabolite of olive oil. Currently, it has become one of the research hotspots in abroad, while domestic attention is less. The relevant research foundation is weaker in China, and the big gap with foreign countries is obvious. As an important active ingredient discovered in recent years, OC has a stronger anti-inflammatory activity than that of ibuprofen, and it had preventive and therapeutic effects on various diseases originating from inflammation, such as rheumatic diseases, cancer, cardiovascular diseases, diabetes, etc. At the same time, its excellent neuroprotective function also promote OC to inhibit the occurrence of neurodegenerative diseases such as Alzheimer's disease and Parkinson's disease. This review focuses on an in-depth introduction to the biological activities including anti-inflammatory activity and anticancer activity(including melanoma, multiple myeloma, breast and colon cancer), neuroprotection, cardiovascular protection, and the prevention and therapeutic effects of diabetes, and the current efficient extraction and separation methods of OC were also analyzed, including liquid-liquid extraction separation method, high performance countercurrent chromatography extraction method, high vacuum assisted extraction method and centrifugal partition chromatography method. Meanwhile, different factors affecting OC contents were comprehensively discussed, and its research progress in bioavailability was explored. Finally, the future research of OC was prospected.

Table and Figures | Reference | Related Articles | Metrics
Research Advance of Cardanol-based Surfactants
YANG Xiao-hui;;XIAO Guo-min;WANG Zhi-min;JING Fei;ZHOU Yong-hong;JIANG Jian-chun;
   2013, 33 (4): 144-148.   DOI: 10.3969/j.issn.0253-2417.2013.04.027
Abstract1048)      PDF(pc) (2023KB)(3234)       Save
This paper reviews recent progress in the cardanol-based surfactants. Especially, cardanol-based anionic surfactant (cardanol sulfonate, cardanol sulfate, cardanol carboxylate) and nonionic surfactants have been widely researched and deve-loped. However, the study of cardanol-based cationic surfactants has not yet been reported. In addition, this paper also prospects the research and application of the cardanol-based surfactants in future.
Related Articles | Metrics
Extraction and Separation of Total Proanthocyanidins from Taxus cuspidata sieb.et Zucc. Branches and Leaves and Their Antidiabetic Activity
Ping JIANG, Jingliang QU, Yuxin JIA, Zhichao SUN, Siying LIU, Fei WANG
Chemistry and Industry of Forest Products    2022, 42 (6): 108-116.   DOI: 10.3969/j.issn.0253-2417.2022.06.015
Abstract15)   HTML1)    PDF(pc) (815KB)(43)       Save

The proanthocyanidins were extracted by enzymolysis and ultrasonic-assisted coupling extraction method using Taxus cuspidata branches and leaves(TCBL) as the materials. The optimum extraction process was investigated by the single factor experiment and response surface experiment and a proanthocyanidin compound was obtained by extraction and separation. Then, in vitro antidiabetic activities of the fractions isolated from different solvent extract and the ethyl acetate extract by macroporous adsorption resin were studied. The results showed that the optimum process conditions of enzyme and ultrasonic assisted coupling extraction of proanthocyanidins were 60% ethanol aqueous as solvent, enzyme concentration of 0.15 g/L, liquid-solid ratio of 14∶1(mL∶g), enzymolysis time of 50 min, enzymolysis temperature of 40 ℃, and ultrasonic power of 120 W. The extraction yield of proanthocyanidins for one time was 3.84%(extraction rate was 83.48%) under these conditions. Response surface model significance test found that the P value of model was 0.000 2, indicating that the difference was very obvious, the regression equation was effective, and the model had statistical significance. The ethyl acetate extract was separated and purified by AB-8 macroporous adsorption resin, dextran gel, and silica gel column chromatography to obtain a proanthocyanidin compound, which was identified as a dimeric proanthocyanidins of catechin and robinatinol by TOF-MS structure identification and ultraviolet full-wavelength scanning. The anti-diabetes activities of 7 components(CBFr.1-CBFr.7) isolated from different solvent extracts and ethyl acetate extracts by macroporous adsorption resin were studied. The results showed that ethyl acetate extract had a good inhibitory effect on α-amylase activity and α-glucosidase activity, and the inhibition rates were 83.6% and 63.03%, respectively. The median inhibitory concentration(IC50) values of CBFr.1-CBFr.5 for α-amylase were ranging from 0.036 to 0.043 g/L, and they all had a good inhibitory ability to α-amylase. CBFr.3 showed the best inhibitory activity against α-glucosidase, with an IC50 value of 0.04 g/L, which was lower than that of acarbose(0.063 g/L). Analysis showed that CBFr.1-CBFr.4 had better α-glycosidase enzyme inhibition activity and moderate α-amylase inhibitory activity, which could achieve the effect to lower blood sugar and reduce side effects owing to excessive reduction of α-amylase activity. Therefore, CBFr.1-CBFr.4 could be used as type Ⅱ diabetes inhibitors.

Table and Figures | Reference | Related Articles | Metrics
PROGRESS ON PRODUCTION TECHNOLOGY AND APPLICATIONS OF BAMBOO CARBON AND BAMBOO DISTILLATE
HU Yong-huang
   2002, 22 (3): 79-83.  
Abstract1110)      PDF(pc) (771KB)(2641)       Save
Theory and practice of thermolysis process to produce bamboo carbon and bamboo distillate,as well as their production technology,physical and chemical properties are summarized.General methods to produce bamboo carbon by kiln and furnace,and main applications of bamboo carbon and bamboo distillates are introduced.The ways of research on development and technology of bamboo carbon are also discussed.
Related Articles | Metrics
Preparation of Nitrogen-doped Activated Carbon from Alkali/Urea Dissolution System and Its Electrochemical Properties
Xuan YANG, Xinyu ZHENG, Jianhua LYU, Hao YING, Biao HUANG, Guanfeng LIN
Chemistry and Industry of Forest Products    2021, 41 (2): 10-16.   DOI: 10.3969/j.issn.0253-2417.2021.02.002
Abstract258)   HTML180247)    PDF(pc) (734KB)(347)       Save

Nitrogen-doped activated carbon was fabricated by one-step pyrolysis with Chinese fir sawdust as raw material, melamine solid waste(oxhydryl and amino triazine, OAT) as nitrogen-rich source, alkali/urea system as solvent. The effects of activation temperatures and melamine solid waste dosage on adsorption performance and electrochemistry performance of activated carbon were investigated. X-ray photoelectron spectroscopy(XPS) and specific surface area analyzer were used to study the surface structure and pore structure of the material. Cyclicvoltammetry(CV) curves, galvanostatical charge/discharge(GCD) and electrochemical impedance spectroscopy(EIS) were used to test the electrochemical performance of samples. The results showed that with the increase of melamine solid waste content, the yield and adsorption performance of activated carbon samples increased first and then decreased; the addition of melamine solid waste was beneficial to increase the yield, nitrogen content, adsorption performance and electrochemical performance of nitrogen-doped activated carbon. The specific surface area and pore structure of carbon materials affected the electrochemical performance of activated carbon samples. When the activation temperature was 900 ℃ and the melamine solid waste content was 15%, the yield of nitrogen-doped activated carbon was 34.2%, the iodine adsorption value was 1 116 mg/g, and the methylene blue adsorption value was 165 mg/g, specific surface area was 1 324 m2/g, nitrogen content was 3.5%. In the 6 mol/L KOH electrolyte, the specific capacitance could reach 193 F/g when the current density was 1 A/g.

Table and Figures | Reference | Related Articles | Metrics
Chemical Structure of Tannins in Cercis chinensis and Cercis glabra and Their Antioxidant Activity
Minghao WANG, Jinghan ZHANG, Jingke ZHAO, Liangliang ZHANG, Jiayan LUO
Chemistry and Industry of Forest Products    2022, 42 (6): 84-90.   DOI: 10.3969/j.issn.0253-2417.2022.06.012
Abstract19)   HTML2)    PDF(pc) (667KB)(42)       Save

The contents of extractable condensed tannins(ECT) in Cercis chinensis, Cercis gigantea leaves and pods were determined. The chemical structure were analyzed by nuclear magnetic resonance(NMR) combined with reversed-phase high performance liquid chromatography-mass spectrometry(RP-HPLC-MS), and the antioxidant activities were determined by DPPH scavenging assay and ferric reducing/antioxidant power(FRAP) assay. The results showed that the mass fractions of tannins in C. chinensis, C. glabra leaves and pods were 151.56, 96.75 and 198.12 mg/g, respectively. The structural units of flavan-3-ols which constituted three condensed tannins, were mainly procyanidin and prodelphidin, and there were galloacylated structures at the C3 position in their structural unit. All three condensed tannins had certain antioxidant activity. The median inhibitory concentration(IC50) values of the three condensed tannins for scavenging DPPH free radicals(DPPH·) were 67.02-97.70 mg/L, which were all higher than that of positive control BHA. The FRAP values of three condensed tannins was 3.51-5.56 mmol/g at the mass fraction of 125 mg/L, which were lower than the positive control BHA(6.51 mmol/g). Among them, the tannins of C. chinensis leaves showed excellent antioxidant activity, and its IC50 values of clearance rate of DPPH· was 67.02 mg/L, which was better than the positive control Vc(76.65 mg/L). Meanwhile, its FRAP value was 5.56 mmol/L.

Table and Figures | Reference | Related Articles | Metrics