Journal of Plant Ecology
·
2014
·Vol. 8
·期 4
·436-448
·
IF 2.284
Zhang Shujuan,Wang Li,Ma Fang,Bloomfield Keith J.,Yang Jixian,Atkin Owen K.
AimsOur study quantified the combined effects of fertilization and inoculation with arbuscular mycorrhizal fungi (AMF) on grain yield and allocation of biomass and nutrients in field-grown rice (Oryza sativa L.).MethodsA two-factor experiment was conducted at a field site in northeast of China (in Shuangcheng, Heilongjiang Province, Songhua River basin): six nitrogen–phosphorus–potassium fertilizer levels were provided (0, 20, 40, 60, 80 and 100% of the local norm of fertilizer supply), with or without inoculation with Glomus mosseae. At maturity, we quantified the percentage of root length colonization by AMF, grain yield, shoot:root ratios, shoot N and P contents and nutrients allocated to panicles, leaves and stems.Important FindingsAs expected, inoculation resulted in greatly increased AMF colonization, which in turn led to higher shoot:root ratios and greater shoot N contents. Shoot:root ratios of inoculated rice increased with increasing fertilization while there was a significant interaction between fertilization and inoculation on shoot:root ratio. Additionally, AMF inoculation increased panicle:shoot ratios, panicle N:shoot N ratios and panicle P:shoot P ratios, especially in plants grown at low fertilizer levels. Importantly, inoculated rice exhibited higher grain yield, with the maximum improvement (near 62%) at the lower fertilizer end. Our results showed that (i) AMF-inoculated plants conform to the functional equilibrium theory, albeit to a reduced extent compared to non-inoculated plants and (ii) AMF inoculation resulted in greater allocation of shoot biomass to panicles and increased grain yield by stimulating N and P redistribution to panicles.
研究领域:
植物学
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农业科学
✓ 已验证
产品关联
DOI
高影响因子
Communications Materials
·
2024
·Vol. 5
·期 1
·1-8
·
IF 7.5
Ai Yuanfang,Zheng Na,Liu Wenbo,Yang Ping,Wu Xi,Tian Yichen,Wang Chuyi,Liu Heyang,Huang Chongping,Liang Zhongli,Zhu Feng,Tang Longcheng,Ye Nanbiao,Li Jianjun,Cao Kun
Frequent forest fires, driven by hotter and drier climates, threaten biodiversity and human health, causing significant economic losses, air pollution, soil erosion, and degeneration. Current active and passive fire protection methods often suffer from environmental pollution, poor flexibility, and limited availability in remote areas. However, fast-acting surface flame retardants for passive forest fire protection, particularly for foliage, are rare. Herein, we report an easily obtainable gelatin-based fire spray, which resulted in 1.8 and 16.3-fold extension in ignition time, 34% and 39% reductions in total heat release, 78% and 92% reductions in fire growth index for dead and fresh leaves, respectively. After the fire warning is suppressed, for instance by rain, the sprayed substances can decompose and provide nitrogen and phosphorus as leaf and soil fertilizers without affecting soil microbial function, which increase plant net photosynthesis by 84% and effective nitrogen and phosphorus by 664% and 140%, respectively. Our green flame retardant and fertilizer material allows for simultaneous tree fire protection and growth.
研究领域:
生态学
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环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 142
·期 2
·e56359
·
IF 2.7
Guixin Zhang,Shuxian Weng,Jie Wang,Zhimin Kou,Meiting Liu,Guoqiang Zhu,Lihong Hu,Yonghong Zhou
Polylactic acid (PLA) is a new type of biodegradable material that has been applied in many fields such as extrusion, injection molding, film drawing, and spinning. In contrary, it does not have flame retardancy. In this paper, N-PCDL was synthesized by amidation reaction between COOH of PCDL and NH 2 of tetraethylenepentamine (TEPA), followed by an Atherton-Todd reaction of unreacted NH 2 at the other end of TEPA with P H of DOPO to prepare a novel lignin-based flame retardant containing nitrogen and phosphorus (NP-PCDL). The Fourier transform infrared spectroscopy (FT-IR) and nuclear magnetic hydrogen spectroscopy ( 1 H NMR) analysis results showed that proton peaks of CO NH , P N , and NH appeared in the NP-PCDL spectrum, while the characteristic absorption peak of P H bond disappeared in DOPO, the X-ray photoelectron spectroscopy (XPS) results showed that the degraded lignin consisted of elements C and O, while NP-PCDL consisted of elements C, O, N and P. The above results indicated that NP-PCDL was successfully prepared. NP-PCDL accounted for 3% (mass percentage, the same below), 5% and 10% of PLA, then lignin based flame-retardant PLA composites were prepared by internal mixing and injection molding. Thermogravimetric analysis (TGA) showed that the residual carbon of PLA/3% NP-PCDL, PLA/5% NP-PCDL and PLA/10% NP-PCDL at 800°C were higher than that of pure PLA, with the increase of 56.56%, 97.54%, and 301.64%, respectively; The analysis of SEM, XPS, and Raman showed that PLA/NP-PCDL formed dense, regular and highly graphitized residual carbon with phosphorus nitrogen structure during the combustion process. At the same time, NH 3 , H 2 O and PO˙ free radicals were released, which could dilute combustible gases, destroy free radical chain reaction, isolate combustible gases and heat, so as to play a flame-retardant role.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
COMMUNICATIONS IN SOIL SCIENCE AND PLANT ANALYSIS
·
2023
·
IF 1.8
Shuang Chen,Yihui Wang,Yan Shi
In this study, the efficiency of fertilizers was improved by coating the fertilizers with a hydrogel formed by the polymerization of itaconic acid (IA), maleic acid (MA), acrylic acid (AA), and potassium persulfate (KPS) to form a synergistic fertilizer and improve its slow-release performance. The effect of synergistic fertilizers on the changes in soil nutrients in wheat fields was studied through field and soil column experiments using ordinary and commercial synergistic fertilizers as controls and different application rates of `synergistic fertilizers as treatments. The results revealed that the alkali-hydrolyzed nitrogen (N) and total N contents were significantly higher in T1 than that in CK, and the treatments were ranked as T3 > T2 > T5 > T1 > CK > T4. The difference in the alkali-hydrolyzed N and total N contents between CK and T3 was significant. In terms of available phosphorus (P) and potassium (K) contents, the treatments were ranked as T1 > T4 > T2 > CK > T3 in all soil layers and T3 > T2 > T5 > T1 > CK > T4 in the soil column. The treatments were ranked as T4>CK>T3>T1>T2 in terms of soil organic matter (SOM) content. Compared with ordinary fertilizers, synergistic fertilizers could significantly increase the soil total N, alkali-hydrolyzed N, available P, and available K contents. Compared with ordinary slow-release fertilizers in the market, the effect of synergistic fertilizers is better in improving the use efficiency of fertilizers. By slowly releasing nutrients, synergistic fertilizers can continuously provide nutrients for the growth and development of wheat and improve the use efficiency of fertilizer.
研究领域:
农业科学
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土壤学
·
植物营养学
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
·
IF 2.7
Ting Li,Qianqian Zou,Junhai Wang,Qiang Li,Yumu Zhou,Yulan Tang
The presence of antibiotics in aquatic systems poses a significant risk to both the ecological balance and human health. To address this issue, the development of advanced photocatalytic materials capable of efficiently treating antibiotic-contaminated wastewater is imperative. In this investigation, we successfully synthesized nitrogen–phosphorus co-doped carbon dots (NPCDs) modified (001) TiO2/Ti3C2Tx composites via a series of uncomplicated hydrothermal reactions, ensuring visible light responsivity. Comprehensive characterization of the composite photocatalysts was conducted using XRD, FT-IR, N2 adsorption, SEM, TEM, XPS, UV-Vis DRS, and PL techniques. Subsequently, the photocatalytic performance was assessed through the degradation of tetracycline hydrochloride (TC) and ceftiofur sodium solutions under visible light irradiation. The optimized composites exhibited remarkable photocatalytic degradation efficiencies of 93.4% and 75.5% for TC and ceftiofur sodium, respectively, under visible light, following quasi-primary kinetic behavior. Reactive free radical capture experiments highlighted the predominant roles of ˙O2− and ˙OH species in the photocatalytic degradation process. Additionally, we proposed plausible mechanisms governing photocatalytic degradation based on the obtained results. The heightened photocatalytic reactivity arises from the efficient transfer of photogenerated electrons through the NPCDs → TiO2 →Ti3C2Tx pathway, a mechanism that effectively facilitates the separation and transfer of photogenerated charge carriers.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
DYES AND PIGMENTS
·
2020
·
IF 4.613
Sujie Han,Xipao Chen,Yaoping Hu,Lei Han
As a newly discovered photoluminescent material, carbon dots (CDs) have shown promising performance in many fields. However, due to aggregation-caused fluorescence quenching, most of CDs are poorly emissive in the solid state, which severely restricts their wide applications, especially in the optoelectronic devices . To overcome this problem, herein, we design a novel kind of self-quenching-resistant N , P -doped CDs, using polyethyleneimine (PEI), phosphoric acid , and ethanol as raw ingredients. The as-synthesized CDs are amorphous and contain abundant surface PEI chains which properly separate the individual carbon core and prevent the direct π–π interaction. Such a unique structure conquers self-quenching during aggregation, and gives CDs a bright blue fluorescence in solid state without any other additional matrices. By taking advantage of their excellent optical properties , the CD powers, combined with red emissive europium metal-organic frameworks, are successfully employed as hybrid phosphors for construction of white light-emitting diodes exhibiting a Commission Internationale de L'Eclairage (CIE) coordinate of (0.33, 0.33).
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2020
·
IF 9.038
Qingwei Lin,Mingjun Fan,Xue Peng,Jianmin Ma,Yi Zhang,Fei Yu,Zhenbin Wu,Biyun Liu
Increasing aluminum (Al) use and its effects on aquatic systems have been a global issue, however the Al impacts on submerged plants and their ecological functions were poorly understood. Aquatic simulation experiments were performed to study Al-toxicity on the germination and seedling morphological and physiological characteristics of Vallisneria natans , and investigate their synergistic effect on nitrogen (N), phosphorus (P) change and microbial community in sediment. The seeds germination characteristics, growth and physiological parameters of seedlings, including root activity, were significantly affected by alum treatments and the inhibition levels increased with Al 3+ concentration. The Al accumulation in roots and leaves were significantly different. Al 3+ concentration above 0.3 mg/L showed toxic to V. natans . TN, TP, IP, Fe/Al-P contents in sediments varied markedly under co-existence of Al and V. natans . Additionally, the relative abundance of sediment microbial community related to N, P cycle was effected. Results concluded that the increasing aquatic Al-concentration inhibits growth and propagation of submerged plants and the ecological restoration effect, and exerts synergistic effect with submerged plants on N, P components in sediments. Such findings were helpful for Al ecological evaluation, and were instructive for the submerged plants restoration in shallow eutrophic lakes with Al input.
研究领域:
生态学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Pengfei Song,Li Kang,Hao Wang,Rong Guo,Rongmin Wang
The electrocatalytic conversion of nitrogen gas at ambient conditions represents a novel approach for ammonia synthesis to the sustainable society. It is critical to understand the detailed pathways and mechanisms of this promising process to develop a highly efficient catalyst. Herein, the N, P co-doping carbon (NP-C-MOF-5) catalyst was prepared for electrocatalytic N2 reduction in acid electrolytes under ambient temperatures and pressures. Experimental results showed that there are two products including NH3 and N2H4·H2O on the NP-C-MOF-5 cathode at −0.1 V versus RHE with the yield of 1.08 and 5.77 × 10–4 μg h–1 mgcat.–1, respectively. Moreover, an electrocatalytic pathway on NP-C-MOF-5 was investigated by the electrochemical in situ Fourier transform infrared technique. The results confirmed the formation of N2Hy (1 ≤ y ≤ 4) intermediates on NP-C-MOF-5 cathode surfaces, suggesting an associative pathway for the N2 reduction reaction.
研究领域:
材料科学
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化学工程
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环境科学
✓ 已验证
DOI
高影响因子
PLoS One
·
2024
·Vol. 19
·期 3
·e0295391
·
IF 2.9
Juan Xin,Ning Ren,Xueling Hu,Jin Yang
Although maize is sensitive to zinc (Zn) deficiencies, the responses of maize cultivars to the foliar application of Zn sulfate ( Zn SO 4 ) may vary significantly. Here, we quantified the responses of grain yields and nitrogen (N), phosphorus (P), and potassium (K) absorption to Zn SO 4 using 22 modern maize cultivars. The results revealed that 40.9% of the cultivars were not affected by foliar Zn SO 4 , whereas only 45.5% of the cultivars responded positively to Zn SO 4 , which was evidenced by increased grain numbers and shortened bald tip lengths. The impact of Zn fertilizer might be manifested in the dry biomass, from the 8-leaf stage (BBCH 18). For Zn-deficiency resistant cultivars, the foliar application of Zn SO 4 enhanced N accumulation by 44.1%, while it reduced P and K absorption by 13.6% and 23.7%, respectively. For Zn-deficiency sensitive maize cultivars, foliar applied Zn SO 4 improved the accumulation of N and K by 27.3% and 25.0%, respectively; however, it lowered their utilization efficiency. Hence, determining the optimized application of Zn fertilizer, while avoiding Zn toxicity, should not be based solely on the level of Zn deficiency in the soil, but also, take into consideration the sensitivity of some cultivars to Zn, Furthermore, the supplementation of Zn-deficiency sensitive maize cultivars with N and K is key to maximizing the benefits of Zn fertilization.
研究领域:
农学
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植物营养学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2017
·Vol. 135
·期 9
·45721
·
IF 1.86
Chao Liu,Jiamei Huang,Jihong Zhu,Conghui Yuan,Birong Zeng,Guorong Chen,Yiting Xu,Lizong Dai
A novel P C N bond containing azaphosphorine, 5-(4-hydroxy)anilinomethyl-1,3-di(4-hydroxy)phenyl-1,3,5-diazaphosphorinane (ADDPP-OH), which could be used as both a cocuring agent and a flame-retarding agent for epoxy resins (EPs), was synthesized from tetrakis(hydroxymethyl)phosphonium sulfate and characterized by FTIR, 1 H-NMR, 13 C-NMR, 31 P-NMR, and so on. Compared with the pure EP, the ADDPP-OH–EP composites showed increased decomposition temperatures and char yields. When the content of ADDPP-OH was 10 wt %, the cured EP composite possessed a limiting oxygen index value of 33.7% and passed the V-0 rating of the UL-94 test. The mechanical properties of the ADDPP-OH–EP composites was improved because of the increased crosslinking density. In addition, the morphology of the residual char indicated an intumescent and multiporous structure in the inner space and a compact and continual appearance in the outer layer; this was important in preventing the materials from burning further. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 45721.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Peng Zuo,Yefeng Liu,Xiaolei Liu,Weizhou Jiao,Ruixin Wang
Based on the ever-growing interest of heteroatoms (e.g., P, N, S, transition metals) doping into molybdenum carbide and graphene for electrochemical reactions , herein, a ternary phosphomolybdic acid-polyethyleneimine/graphene oxide nanocomposite as a suitable precursor was developed to not only uniformly hybridize molybdenum and carbon source to perform the controllable in situ growth of well-defined molybdenum carbide nanostructure on graphene by annealing, but also synchronously dope N and P atoms into molybdenum carbide crystal lattice and graphene. The as-prepared hybrid showed remarkable electrocatalytic activity and high stability for hydrogen evolution reaction in basic media, due to the following favorable features, i.e. a large accessible active sites afforded by the ultrafine molybdenum carbide, the heteroatoms doped, the regulated electronic structure, the balanced thermodynamics between hydrogen adsorption and desorption , the accelerated charge/mass transfer ability by the ultrathin and defective carbon layer , and the protection of molybdenum carbide by carbon layer. As a result, it only needed a small overpotential of 47 mV to drive 10 mA cm −2 and a low onset potential of 10 mV, as well as a small Tafel slope of 56.8 mV·dec −1 , thus suggesting its promising potential for hydrogen evolution electrocatalyst .
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2022
·Vol. 414
·期 14
·4217-4225
·
IF 4.478
Xue Yuting,Zhong Haotian,Liu Bin,Zhao Ruixue,Ma Jun,Chen Zhengbo,Li Kai,Zuo Xia
Nanozymes have both the high catalytic activity of natural enzymes and the stability and economy of mimetic enzymes. Research on nanozymes is rapidly emerging, and the continuous development of highly catalytic active nanozymes is of far-reaching significance. This work reports heteroatomic nitrogen (N) and phosphorus (P) double-doped mesoporous carbon structures and metallic Fe coordination generated sponge-like nanozymes (Fe/NPCs) with good peroxidase activity. On this basis, we constructed a highly sensitive colorimetric sensor with cysteine and phenol as simulated analytes using Fe/NPCs nanozymes, and the response limits reached 53.6 nM and 5.4 nM, respectively. Besides, the method has high accuracy in the detection of cysteine and phenol at low concentrations in serum and tap water, which lays a foundation for application in the fields of environmental protection and biosensors. Graphical abstract
研究领域:
生物化学
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环境科学
·
分析化学
✓ 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）