FOOD RESEARCH INTERNATIONAL
·
2022
·
IF 7.425
Hongxia Tan,Yao Li,Hongyuan Zhou,Ting Guo,Ying Zhou,Yuhao Zhang,Liang Ma
The productions of food, agricultural products and feed involve a variety processing conditions, which can affect the release/binding of zearalenone (ZEN) with macro-components in maize, resulting in the interconversion of hidden ZEN with free ZEN. This interconversion can cause the uncertainties and individual differences in the exposure assessment. To fully overcome this uncertainties of the potential risks for humans and animals, further research regarding the key factors and rule of interconversion is needed. This study was designed to analyze the key factors that can induce the interconversion of hidden ZEN with free ZEN during maize processing. Results showed the conversion of hidden ZEN into free ZEN during thermal and alkaline processing, while it showed the conversion of free ZEN into hidden ZEN during acid processing. Furthermore, the temperature and pH-induced interconversion rules were also applicable to the practical maize processing (tortilla production). During producing tortilla, when the processing conditions of 4% lime, cooking time (60 min) and cooking temperature (100 °C) were set, the tortilla products with the lower hidden ZEN hazard could be obtained. This study presented new insights into the risk assessment of maize products as the conversion between hidden ZEN and free ZEN during processing.
研究领域:
食品安全
·
毒理学
✓ 已验证
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2025
·
IF 6.2
Majid Ali Mangi,Benwang Li,Peigao Duan,Changqing Cao
In this study, a green and effective method for the production of acetic acid from crop residues via a two-step process (hydrolysis followed by oxidation) in subcritical water was proposed. For the first step, CO 2 is used to catalyze the hydrolysis of crop residues to obtain intermediates. Next, the intermediates were oxidized in the presence of O 2 to obtain acetic acid. The effects of crop residue type on the yield of acetic acid were first studied. Among all the crop residues selected, the corn cobs provided the highest acetic acid yield, which reached 16.70 wt% at 270 °C for 20 min; 0.11 mol CO 2 /corn cob (g) was added for the first step, and 250 °C was added for 50 min, with 0.15 mol O 2 /corn cob (g) added for the second step. By employing corn cobs as feedstock, the effects of the corn cob/water mass ratio, temperature, time, and CO 2 loading in the first step and the effects of temperature, time, and O 2 loading in the second step on the yield of acetic acid were examined. Among all the parameters examined, the corn cob/water mass ratio had the greatest influence on the acetic acid yield. The highest acetic acid yield of 25.80 wt% was obtained at a corn cob/water mass ratio of 0.0016:1. Under fixed reaction conditions, recycling the product mixture can increase the concentration of acetic acid in the final product and reduce the cost of subsequent separation and purification.
研究领域:
化学工程
·
可再生能源
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
·
2021
·Vol. 102
·期 9
·3636-3643
·
IF 3.639
Jianyuan Jing,Shuiqin Zhang,Liang Yuan,Yanting Li,Yingqiang Zhang,Yanchen Wen,Bingqiang Zhao
BACKGROUND Humic acid (HA)-enhanced urea (HAU) is the top-selling efficiency-enhanced urea in China. Comprehensive investigation into the structure and efficacy of HA complex formation with urea (HACU) – the main reaction product during HAU's production – is required to clarify the reaction mechanism between HA and urea, and to provide guidance for the development of high-efficiency HAU. RESULTS HACU showed discrepant structural and compositional features from raw HA. Nitrogen (N) content in HACU was 7.3 times greater than that of HA. Several high-resolution analytical methods showed a sharp increase of ammonia in the gaseous product during HACU pyrolysis, suggesting that urea contributed N to HACU. HACU was characterized with significantly fewer carboxyl groups than in raw HA, implying that the carboxyl group was the main group in HA to participate in the reaction between HA and urea. The presence of amide-N in HACU verified the structure of the reaction product. Furthermore, both HACU and HA could enhance the biomass in hydroponically grown maize seedlings, but the highest stimulation for HACU came about when its carbon concentrations were 50–100 mg L −1 , higher than the optimal carbon concentration for HA (25 mg L −1 ), attributed to the lower carboxyl group content for HACU to some extent. CONCLUSION During HAU's production, reaction with N derived from urea to form amide-N decreased the carboxyl groups in HA, leading to higher concentrations for HACU required to achieve the similar bioefficacy of HA. © 2021 Society of Chemical Industry.
研究领域:
农业科学
·
植物生理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Cleaner Production
·
2022
·
IF 11.072
Tong An,Yan Qin,Hao Cheng,Jianning Wu,Weihua Su,Guihua Meng,Hongxiao Wei,Chenhui Sun,Zhiyong Liu,Xuhong Guo
Phosphorus (P) is an essential nutrient widely used in crops. Phosphate fertilizers are easily adsorbed on the soil surface, resulting in poor migration to the roots of crops, and a large amount of nutrients cannot be absorbed and utilized, resulting in waste of resources and low bioavailability . To solve the problem of insufficient mobility of phosphate fertilizer, this work uses TiO 2 -WO 3 to catalyze the oxidation and pyrolysis of lignite to synthesize small molecular humic acid , and uses small molecular humic acid to coat commercial phosphate fertilizer (MAP) to obtain a new type of phosphate fertilizer (AMAP) with good fluidity. Water contact angle was determined from initially hydrophobic (132°) to hydrophilic (76°). Humic spectroscopic ratio (E 4 /E 6 ), H/C and molecular weight distributions confirmed the effectiveness of the TiO 2 -WO 3 catalyst and the successful modification of weathered lignite. The migration characteristics of phosphorus in the soil were studied by leaching migration experiments. The results showed that the effective phosphorus content of the new coated phosphate fertilizer (AMAP) in the soil exceeded that of the commercial phosphate fertilizer (MAP) at different vertical migration distances. After 21 d of incubation at the same fertilizer level, new coated phosphate fertilizer (AMAP) of phosphate fertilizer added with different products showed elevated levels of P. Migration data indicated that the migration distance of effective phosphorus approximated the long root distance of early corn, which benefitted crop growth. The pot experiment confirmed improved corn growth and improvement in the utilization rate of phosphorus fertilizer. All in all, activated lignite (AHA) can reduce or inhibit the fixation of phosphorus nutrients in the soil, and has obvious application value for improving the efficiency of phosphate fertilizers.
研究领域:
农业科学
·
土壤学
✓ 已验证
产品关联
DOI
高影响因子
BIOMASS & BIOENERGY
·
2022
·
IF 5.774
Bang Yao,Qinhao Kang,Jie Fu,Yang Liu,Wenya Ao,Long Wang,Zhihui Jiang,Tianhao Zhang,Yongmeng Song,Zeyu Deng,Asif Ali Siyal,Jianjun Dai
Experiments were carried out to investigate cellulose and furfural from catalytic hydrolysis of corncob. This process improved the comprehensive utilization of hemicellulose and cellulose in biomass resources. Influence of factors (temperature, reaction time, concentration of catalysts, liquid to solid ratio (LSR)) on hydrothermal characteristics, furfural yield, properties and retention of cellulose were investigated through orthogonal and parameter tests. Acetic acid (6 wt%) and FeCl 3 (40 mM) achieved the highest furfural yield (47.60%) and relatively high cellulose retention ratio (71.84%) at 180 °C, 45 min, and 3 mL/g of LSR. While AlCl 3 and citric acid obtained low furfural yield and the lowest cellulose retention ratio (8.38%). Furfural was dominant in distillated organics (GC-MS areas ≥97.9%), by contrast furfural, 5-hydroxymethyfurfural and vanillin were main organics in residual liquors. The peak of furfural yield switched to shorter reaction time as temperature increased. Combination of AlCl 3 with acetic acid and citric acid accelerated cellulose degradation. NaCl inhibited furfural yield and promoted lignin decomposition. Higher temperature and greater concentration of FeCl 3 contributed to reduced crystallinity of cellulose during hydrothermal treatment.
研究领域:
生物化学
·
可再生资源利用
✓ 已验证
产品关联
DOI
高影响因子
WATER AIR AND SOIL POLLUTION
·
2023
·Vol. 234
·期 3
·1-12
·
IF 2.9
Liu Caiying,Liu Yanyan,Feng Jiapeng,Li Yaru,Tao Jun,Xie Xiaoxiao
The paper aims to evaluate the effectiveness of biochar prepared from the co-pyrolysis of rice husk and cow bone (RHCBC) for in situ remediation and amelioration of Cd-contaminated soil. Effects of RHCBC on Cd bioavailability in soil and Cd uptake in corn growth were investigated through cultivation experiments and pot experiments. The results showed that the addition of RHCBC in the Cd-contaminated soil achieved the increase of soil pH, CEC, and SOM, whereas the soil available Cd content was reduced by 29.08–51.06%, which was proved by the transformation of Cd from acid soluble and exchangeable state to residual state. Furthermore, the nutrient contents of soil were also increased by 82.41–230.09% for alkali-hydrolyzable N, 66.81–144.03% for available P, and 16.20–77.70% for available K, respectively, which promoted the growth of corn. Overall, it is a promising strategy to employ RHCBC for in situ remediation of Cd-contaminated soil and promotion of plant growth as efficient soil amendment.
研究领域:
土壤科学
·
环境修复
·
农业科学
✓ 已验证
产品关联
DOI
高影响因子
BMC PLANT BIOLOGY
·
2017
·Vol. 17
·期 1
·1-16
·
IF 3.964
Huang Yutao,Lin Cheng,He Fei,Li Zhan,Guan Yajing,Hu Qijuan,Hu Jin
Background The low seed vigor and poor field emergence are main factors that restricting the extension of sweet corn in China. Spermidine (Spd) plays an important role in plant growth and development, but little is known about the effect of Spd on sweet corn seed germination. Therefore the effect of exogenous Spd on seed germination and physiological and biochemical changes during seed imbibition of Xiantian No.5 were investigated in this study.Results Spd soaking treatment not only improved seed germination percentage but also significantly enhanced seed vigor which was indicated by higher germination index, vigor index, shoot heights and dry weights of shoot and root compared with the control; while exogenous CHA, the biosynthesis inhibitor of Spd, significantly inhibited seed germination and declined seed vigor. Spd application significantly increased endogenous Spd, gibberellins and ethylene contents and simultaneously reduced ABA concentration in embryos during seed imbibition. In addition, the effects of exogenous Spd on H2O2 and MDA productions were also analyzed. Enhanced H2O2 concentration was observed in Spd-treated seed embryo, while no significant difference of MDA level in seed embryo was observed between Spd treatment and control. However, the lower H2O2 and significantly higher MDA contents than control were detected in CHA-treated seed embryos.Conclusion sThe results suggested that Spd contributing to fast seed germination and high seed vigor of sweet corn might be closely related with the metabolism of hormones including gibberellins, ABA and ethylene, and with the increase of H2O2 in the radical produced partly from Spd oxidation. In addition, Spd might play an important role in cell membrane integrity maintaining.
研究领域:
植物生理学
·
农业科学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF PEST SCIENCE
·
2014
·Vol. 88
·期 1
·25-35
·
IF 2.664
Toepfer Stefan,Zellner Michael,Szalai Mark,Kuhlmann Ulrich
The western corn rootworm ( Diabrotica virgifera virgifera ; Coleoptera: Chrysomelidae) is a major maize pest in North America and Europe. For developing population models to better understand this key pest, survival rates need to be known. In contrast to the reported field survival of eggs, the three larval instars, and pupae, the survival of the adults had not been assessed under field conditions. Weekly survival of adults was studied in large walk-in gauze cages in two fields in Hungary between 2009 and 2011. Each cage contained a combination of maize with two out of nine other crops. The number of adult beetles rapidly decreased with time following an exponential-like survivorship curve, with a weekly mortality varying between 31 and 61 %. This is in contrast to laboratory experiments, where populations decreased with time following a linear-like curve. The average lifespan was only 19 days with a maximum of 84 days. After 14 days, 55 % of adults had died, thus, having had no chance to lay eggs because of the pre-oviposition period required. Maize appeared to be the most appropriate crop for survival. Combining maize with other crops that could serve as alternative food did not enhance survivorship, and many combinations were in fact disadvantageous. Crop and weed coverage played a minor role in influencing survival, and only few weeds appeared slightly advantageous. It is argued that the role of alternative food sources for D. v. virgifera adults might be overestimated. Survivorship equations are suggested to support modelling of population dynamics of this pest and to support timing of direct control measures against the adults to prevent their egg laying and therefore damage to maize roots the following year.
研究领域:
昆虫学
·
农业害虫管理
·
种群动态模型
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Peikuan Wang,Tianran Zheng,Shuyang Gan,Jiayu Miao,Jianfeng Yao
Because of its wide range of material sources, high specific surface area, and advantageous electrochemical characteristics, cellulose biochar derived from natural lignocellulosic raw materials has been extensively applied as electrodes for energy storage materials. To produce carbon materials with improved qualities, lignocellulosic substrates often need to be pretreated, activated, and modified. In this study, corncob was processed with bisulfite to break down its recalcitrant structure, followed by direct use of the pretreated substrate to avoid the post-pretreatment washing step and take full advantage of the generated lignosulfonate (LS) in the next pyrolysis process. The residual LS in the pretreated sample not only increased the specific surface area of the corncob-biochar, but also introduced the heteroatom S. The biochar obtained through pyrolysis at 900 °C with KOH activation from unwashed pretreated corncob (ABU-900) had a specific surface area of 3130 m 2 /g, and it displayed a high coulombic efficiency of 94.1% after 5000 cycles in a three-electrode system. Owing to the successful introduction of heteroatoms, an asymmetric supercapacitor device (ABU-900//activated carbon) delivered an excellent specific capacitance of 141.2 F/g at a current density of 1 A/g and an energy density of 43.7 Wh/kg with a power density of 619 W/kg. This work offers a new and simple route for preparing cellulose biochar-based electrodes from lignocellulose waste.
研究领域:
材料科学
·
能源存储
·
生物质利用
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF FOOD ENGINEERING
·
2020
·
IF 4.499
Ying Ji
The combination of 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO)-oxidization and annealing was applied to modify structural properties of corn starch in order to obtain starch polymer microgels. Microgels were characterized by X-ray diffraction, ATR-FTIR and thermogravimetry analysis (TGA). The effects of microgels on the uptake and release of lysozyme were also analyzed. The formation of oxidized microgels through the crosslinking between starch molecules and sodium trimetaphosphate was confirmed by X-ray diffraction. The ATR-FTIR analysis suggested that TEMPO-oxidation results in the formation of carboxyl groups. TGA data indicated that oxidized-annealed microgels had less thermal stability than oxidized microgels. Furthermore, the oxidized-annealed microgels had an improved capacity for uptake and release of lysozyme. At this stage of the exploration, microgels prepared from corn starches by annealing and oxidation is simple and efficient.
研究领域:
食品科学
·
生物化学
✓ 已验证
产品关联
DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2017
·
IF 5.651
Yuanji Shi,Tao Zhang,Hongqiang Ren,Andrea Kruse,Ruofan Cui
An adsorbent hydrochar was synthesized from corn cobs and modified with polyethylene imine (PEI). The hydrochars before and after modification were characterized by scanning electron microscopy, Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and thermogravimetric analysis. FTIR and XPS revealed that the PEI was grafted onto the hydrochar via ether and imine bonds formed with glutaraldehyde. The maximum adsorption capacities for Cr(VI) (33.663 mg/g) and Ni(II) (29.059 mg/g) on the modified hydrochars were 365% and 43.7% higher, respectively, than those on the unmodified hydrochar. A pseudo-second-order model described the adsorption of Ni(II) and Cr(VI) on all the adsorbents. The adsorption of Cr(VI) was endothermic, spontaneous, increased disorder, and obeyed the Langmuir model. By contrast, the adsorption of Ni(II) was exothermic, spontaneous, decreased disorder, and obeyed the Freundlich model. XPS confirmed that the adsorption sites and mechanisms for Ni(II) and Cr(VI) on the modified hydrochars were different.
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
MOLECULES
·
2018
·Vol. 23
·期 5
·1200
·
IF 3.098
Meirong Quan,Qi Zhi Liu,Zhi Long Liu
The essential oil ofStachys riederivar.japonica(Family: Lamiaceae) was extracted by hydrodistillation and determined by GC and GC-MS. A total of 40 components were identified, representing 96.01% of the total oil composition. The major compounds in the essential oil were acetanisole (15.43%), anisole (9.43%), 1,8-cineole (8.07%), geraniol (7.89%), eugenol (4.54%), caryophyllene oxide (4.47%), caryophyllene (4.21%) and linalool (4.07%). Five active constituents (acetanisole, anisole, 1,8-cineole, eugenol and geraniol) were identified by bioactivity-directed fractionation. The essential oil possessed fumigant toxicity against maize weevils (Sitophilus zeamais) and booklice (Liposcelis bostrychophila), with LC50values of 15.0 mg/L and 0.7 mg/L, respectively. Eugenol and anisole exhibited stronger fumigant toxicity than the oil against booklice. 1,8-Cineole showed stronger toxicity, and anisole as well as eugenol exhibited the same level of fumigant toxicity as the essential oil against maize weevils. The essential oil also exhibited contact toxicity againstS. zeamaisadults andL. bostrychophila, with LC50values of 21.8 µg/adult and 287.0 µg/cm2, respectively. The results indicated that the essential oil ofS. riederivar.japonicaand its isolates show potential as fumigants, and for their contact toxicity against grain storage insects.Keywords:Stachys riederivar.japonica;Sitophilus zeamais;Liposcelis bostrychophila;fumigant;contact toxicity;essential oil
研究领域:
植物化学
·
昆虫学
·
农业科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）