JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2019
·
IF 2.298
Jingjing Chen,Jingjing He,Ningxin Li,Huidong Zheng,Suying Zhao
The solubility of borneol, camphor, and isoborneol in four solvents (i.e., acetone, ethanol, p-cymene, and p-xylene) was measured by the static equilibrium method within the temperature range of 296.65–348.85 K under the atmosphere. The fusion points and fusion enthalpies of borneol and isoborneol were determined by differential scanning calorimetry. The Apelblat equation, Wilson model, and NRTL model were employed to correlate the measured solubility data, and the NRTL model fits the measured data better. Mixing properties of each solute–solvent pair are calculated by the NRTL model.
研究领域:
化学工程
·
药学
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DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2020
·Vol. 27
·期 35
·43625-43637
·
IF 3.056
Xu Sheng,Xiao Huiru,Jiang Xinde,Liu Lingli,Cao Meng,Wang Zhenxi
Camphor leaf (CL) was widely used to extract camphor oil and thus led to abundant forestry waste. In order to reduce pollution, the waste CL was used to prepare bio-adsorbent for Pb(II) removal after alkali treatment and functional modification. The effects of solution pH, initial Pb(II) concentration, contact time and solution temperature were investigated on adsorption process to evaluate the potential application in heavy metal ions’ removal. It was found that the massive hydroxyl groups released and plenty of micro-pores formed after the alkali treatment of CL bio-adsorbent, which obviously increased the Pb(II) adsorption. And the adsorption performance promoted continually after further functional modification by ionized 1,2,3,4-butanetetracarboxylic acid (BTCA). The increase of pH was favourable for the adsorption even though the precipitation effect was deducted. Linear fitting method was more suitable to describe the adsorption process than nonlinear fitting method, including adsorption isotherms and adsorption kinetics research. The adsorption thermodynamics was better to be described by nonlinear fitting method due to its lower root mean square error ( RMSE ) value and higher R 2 value. Among which, the adsorption isotherm and adsorption kinetics were fitted well to Langmuir model and pseudo-second-order model, respectively. The adsorption thermodynamics was exothermic in nature and the process was spontaneous at low solution temperature. The adsorption mechanism was revealed as the combination of dominant chemical adsorption and assistant physical adsorption.
研究领域:
环境科学
·
生物学
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DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2026
·
IF 11.3
Yu Xu,Siyuan Feng,Shujia Sun,Yaolong Yan,Wen Hao
Per- and polyfluoroalkyl substances (PFAS) are persistent contaminants that strongly accumulate at air–water interfaces, where they influence fate, transport, and treatment efficiency. However, experimental access to their dynamic interfacial effects remains limited. Here, camphor-driven Marangoni motors were employed as macroscopic probes to translate molecular adsorption of PFAS into measurable propulsion dynamics. Using perfluorooctanoic acid (PFOA) as a model PFAS and sodium dodecyl sulfate (SDS) as a hydrocarbon benchmark, systematic comparisons revealed distinct interfacial signatures. Increasing PFOA concentration induced a progression from continuous propulsion to oscillatory motion and confinement, with 0.4 mM PFOA suppressing the propulsion velocity by approximately 72% relative to the control. In contrast, SDS transitioned from fast propulsion to long-period oscillations and complete arrest, particularly in the presence of Ca²⁺. Quantitative analysis of speed, oscillation period, and peak velocity demonstrated that PFOA exerted more persistent suppression of Marangoni propulsion and retained oscillatory dynamics under ionic perturbation, highlighting its strong and resilient interfacial activity. Localized interactions between PFOA and camphor may modulate interfacial stress renewal in the camphor diffusion zone, supporting sustained oscillatory propulsion compared with SDS. This framework provides a physically transparent model linking amphiphile adsorption to macroscopic interfacial mobility and establishes motion metrics as diagnostic observables for probing amphiphile–interface interactions under non-equilibrium conditions, offering a low-cost platform for mechanistic insight into interfacial processes relevant to water and wastewater treatment.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2019
·
IF 6.361
Bananakere Nanjegowda Chandrashekar,Nianduo Cai,Louis W.Y. Liu,Ankanahalli Shankaregowda Smitha,Zefei Wu,Pengcheng Chen,Run Shi,Weijun Wang,Jingwei Wang,Chunmei Tang,Chun Cheng
Hypothesis Transfer of chemical-vapor-deposition (CVD) grown monolayer graphene from one substrate to another requires a transfer agent. The transfer agent usually needs to be removed by washing with organic solvent such as acetone or high temperature annealing, which is harmful to the structure integrity and intrinsic property of a graphene film. Here, we propose the use of camphor as a transfer agent to transfer monolayer graphene onto a target dielectric substrate, which bypasses these demanding steps and only needs the common alcohol solvent rinsing. Experiments To facilitate a crack-free graphene transfer, the proposed approach allows the camphor supported polycrystalline graphene to be rationally fastened with a thickened and solidified edge bead (i.e. camphor oil-filled boundary). A layer of camphor was first deposited onto a graphene/copper surface. The backside copper substrate was then etched away, whilst the camphor/graphene bilayer was placed onto a SiO 2 /Si substrate. Finally, the camphor remaining on the camphor/graphene/SiO 2 /Si sublimed into a vapor. The graphene/SiO 2 stack was then examined by microscopic, spectral and electrical characterization. Findings The results of our examination suggest that the proposed method can guarantee a clean and damage-free graphene transfer. This method is particularly attractive in the application area for nano/micro-electronics, where it provides CVD-grown graphene the ability to be used on wide varieties of substrates that are sensitive to organic solvents and high temperature.
研究领域:
材料科学
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纳米技术
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电子学
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DOI
PubMed
高影响因子
Journal of Fungi
·
2022
·Vol. 8
·期 8
·762
·
IF 5.724
Xinying Duan,Li Zhang,Hongyan Si,Jie Song,Peng Wang,Shangxing Chen,Hai Luo,Xiaoping Rao,Zongde Wang,Shengliang Liao
Control of fungal phytopathogens affecting crops and woodlands is an important goal in environmental management and the maintenance of food security. This work describes the synthesis of 37 camphor derivatives, of which 27 were new compounds. Their antifungal effects on six fungi were evaluated in vitro. Compounds3a,4aand5kshowed strong antifungal activity againstTrametes versicolor, with EC50values of 0.43, 6.80 and 4.86 mg/L, respectively, which were better than that of tricyclazole (EC50118.20 mg/L) and close to or better than that of carbendazim (EC501.20 mg/L). The most potent compound,3a, exhibited broad-spectrum antifungal activity towards six fungi with EC50values within the range of 0.43–40.18 mg/L. Scanning electron microscopy demonstrated that compounds3a,4aand5kgave irregular growth and shriveling of the mycelia. In vitro cytotoxicity evaluation revealed that the tested camphor derivatives had mild or no cytotoxicity for LO2and HEK293T cell lines. Quantitative structure−activity relationship (QSAR) analysis revealed that the number of F atoms, relative molecular weight, the atomic orbital electronic population and total charge on the positively charged surfaces of the molecules of camphor derivatives have effects on antifungal activity. The present study may provide a theoretical basis for a high-value use of camphor and could be helpful for the development of novel potential antifungals.Keywords:camphor;synthesis;antifungal activity;cytotoxicity;QSAR
研究领域:
植物保护
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药物化学
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环境科学
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PubMed
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2025
·
IF 2.5
Cao Lihua,Lin Xinyan,Cao Jiaxin,Peng Guixiang,zhang Yang,Zhang Shunhua,Ma Yongli,Zhu Jianbin,Zhang Wenhua,Xia Fei,Xu Zhiyong,Hou Xue
The simple processing of graphene film electrodes with high mass loading provides enormous possibilities for customizing its hierarchical pore structure and characteristics for energy storage capabilities. Here, a hierarchical graphene film electrode was obtained via an effective strategy in which sodium camphor sulfonate (CAS) was used as a green pore-forming agent for modulating the porosity of the graphene film. The introduction of CAS can alleviated the issue of stacking of reduced graphene oxide (rGO) sheets, easily sublimed at relatively low temperatures for fine-tuning of pore characteristics. The optimized graphene film with increased micropores and mesopores provides high specific capacitance (150 F g −1 at 0.1 A g −1 ), rate capacity (100 F g −1 at 10 A g −1 ), capacity retention (98.1% over 10,000 cycles), and energy density (1.6 mW h cm −2 at 7.2 mW cm −2 ). The prepared graphene film materials hold immense potential for constructing high-performance film electrodes for electrochemical energy storage. Graphical
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高影响因子
Carbon Letters
·
2019
·Vol. 29
·期 3
·213-218
·
IF 1.807
Ding Chenfeng,Yan Xiaodong,Lan Jin-le,Ryu Seungkon,Yu Yunhua,Yang Xiaoping
Sustainable biomass-derived porous carbons demonstrate excellent capacitive properties owing to their heteroatom-rich nature and distinct textural feature. Herein, a series of nitrogen-/phosphorus-/oxygen-containing microporous carbons (CWW-N/P/O-MPCs) have been successfully fabricated by etching in H 2 O 2 solution, pre-treatment of camphor wood wastes with KOH solution and subsequent carbonization. As an electrode material for supercapacitors, the typical microporous carbon (CWW-N/P/O-MPCs-0.5) exhibits a remarkably high specific capacitance of 245 F g −1 at 0.5 A g −1 , corresponding to an impressively large volumetric capacitance of 208 F m −3 , and excellent long-term stability over 10,000 cycles. The excellent electrochemical performance can be ascribed to the optimal combination of heteroatom groups and ultrafine micropores.
研究领域:
材料科学
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能源存储
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DOI
高影响因子
JOURNAL OF CHEMICAL PHYSICS
·
2024
·Vol. 160
·期 15
·
IF 3.1
Zhao Miao Miao,Du Na,Zhu Yu Ying,Yen Fei
Many solid crystals exhibit a structural phase transition where a subset of its ions or entire molecules become orientationally ordered. As to why such ordering occurs remains mostly unresolved. We consider the extremely weak magnetic elements arising from the reorientations of the molecules experiencing mutual resonance to play the chief role. Two new features are identified in d -camphor: (1) the magnetic susceptibility abruptly changes when crossing the order–disorder phase transition at T II–III = 239.8 K during cooling and at T III–II = 245.2 K during warming and (2) the complex dielectric constant exhibits two successive discontinuities only 0.2 K apart near the critical temperatures when the sweeping rate is only 0.1 K/min. We discuss how the change in entropy associated with order–disorder transitions in plastic crystals represents temporal changes rather than spatial changes in the system. Our findings may be extended to study why many other crystalline solids exhibit orientational ordering and irreversibility.
研究领域:
物理学
·
材料科学
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DOI
PubMed
高影响因子
FLUID PHASE EQUILIBRIA
·
2015
·
IF 2.2
Liying Cai,Tingping Xie,Suying Zhao,Huidong Zheng,Dan Wu
The solubility of d -camphor-10-sulfonic acid (D-CSA, CAS No. 3144-16-9) in seven solvents (ethyl acetate, methyl acetate , n -butyl acetate, isopropyl acetate, glacial acetic acid, acetic anhydride and propionic acid) was measured under atmospheric pressure. The solubility data were correlated by the modified Apelblat equation, the λh equation, the Wilson model and the UNIQUAC model, respectively. And the thermodynamic parameters of D-CSA, molar dissolution enthalpy and entropy, were determined by the Van’t Hoff equation to explain its dissolving behavior in each solvent.
研究领域:
化学工程
·
物理化学
✓ 已验证
DOI
高影响因子
PLANT SCIENCE
·
2023
·
IF 5.2
Yuyan Cai,Haozhe Xu,Chenyi Xu,Zhaojiang Zuo
Cinnamomum camphora has great economic value for its wide utilization in traditional medicine and furniture material, and releases lots of monoterpenes to tolerate high temperature. To uncover the adjusting function of monoterpenes on primary metabolism and promoting their utilization as anti-high temperature agents, the photosynthetic capacities , primary metabolite levels, cell ultrastructure and associated gene expression were surveyed in C. camphora when it was blocked monoterpene biosynthesis with fosmidomycin (Fos) and fumigated with camphor (a typical monoterpene in the plant) under high temperature (Fos+38 °C+camphor). Compared with the control (28 °C), high temperature at 38 °C decreased the starch content and starch grain size, and increased the fructose, glucose, sucrose and soluble sugar content. Meanwhile, high temperature also raised the lipid content, with the increase of lipid droplet size and numbers. These variations were further intensified in Fos+ 38 °C treatment. Compared with Fos+ 38 °C treatment, Fos+ 38 °C+camphor treatment improved the starch accumulation by promoting 4 gene expression in starch biosynthesis, and lowered the sugar content by suppressing 3 gene expression in pentose phosphate pathway and promoting 15 gene expression in glycolysis and tricarboxylic acid cycle . Meanwhile, Fos+ 38 °C+camphor treatment also lowered the lipid content, which may be caused by the down-regulation of 2 genes in fatty acid formation and up-regulation of 4 genes in fatty acid decomposition. Although Fos+ 38 °C+camphor treatment improved the photosynthetic capacities in contrast to Fos+ 38 °C treatment, it cannot explain the variations of these primary metabolite levels. Therefore, camphor should adjust related gene expression to maintain the primary metabolism in C. camphora tolerating high temperature.
研究领域:
植物生理学
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分子生物学
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环境胁迫
·
代谢组学
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PubMed
高影响因子
Cardiovascular Toxicology
·
2021
·Vol. 21
·期 11
·901-913
·
IF 3.239
Du Zheng-Cai,Xia Zhong-Shang,Zhang Ming-Zhe,Wei Yan-Ting,Malhotra Nemi,Saputra Ferry,Audira Gilbert,Roldan Marri Jmelou M.,Hsiao Chung-Der,Hao Er-Wei,Hou Xiao-Tao,Deng Jia-Gang
Camphor is a terpene ketone with aromatic and volatile properties in nature derived from the bark of Cinnamomum camphora or synthesized from turpentine. Camphor exhibits various biological properties such as anti-microbial, anti-viral, anti-coccidial, and anti-cancer. It is also used as a form of topical medication for skin irritation, joint pain, and as a relief for itching from insect bites. However, even though the high dose of camphor has been documented to be toxic/lethal in humans in different studies, camphor’s developmental toxicity has not yet been explored, and its extensive mechanism of action is still unclear. In the present study, we aimed to assess the toxic effects of camphor in zebrafish embryos in the initial developmental stages. The obtained results demonstrated that a sub-lethal dose of camphor caused a decrease in hatching rate, body length, and substantial elevation in malformation rate on zebrafish embryos. On further observation, in the following time frame, curved body and pericardial edema of zebrafish were also observed. Furthermore, exposure to a sub-lethal dose of camphor was also able to trigger cardiotoxicity in zebrafish larvae. Later, on subsequent biochemical analysis, it was found that the antioxidant capacity inhibition and oxidative stress elevation that occurred after camphor exposure might be associated with the inhibition of total superoxide dismutase (SOD) activity and an increase in reactive oxygen species (ROS) and malondialdehyde (MDA) concentration. In addition, compared to the control group, several apoptotic cells in treated zebrafish were also found to be elevated. Finally, after further investigation on marker gene expressions, we conclude that the developmental toxicity of camphor exposure might be associated with apoptosis elevation and oxidative stress. Taken together, the current study provides a better understanding of the developmental toxicity of camphor on zebrafish, a promising alternative animal model to assess the developmental toxicity of chemical compounds.
研究领域:
毒理学
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发育生物学
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水生毒理学
·
生物化学
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DOI
PubMed
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 51
·29711-29720
·
IF 3.049
Yan Zhang,Yunyun Wang,Yuxun Zhao,Wen Gu,Yongqiang Zhu,Shifa Wang
A series of novel camphor-based pyrimidine derivatives (3a–3x) have been synthesized; their structures were determined by using conventional methods and compound 3f was further confirmed through single crystal XRD analysis. The cytotoxic activity of the target compounds against a panel of human normal (GES-1) and cancer cell lines (MDA-MB-231, RPMI-8226, A549) was evaluated by MTS assay. Here we found that compound 3f exhibited the strongest anti-tumor activity, comparable to that of etoposide, and had much lower cytotoxicity to normal GES-1 cells (IC50 > 50 μM) than the reference drug (IC50 = 8.89 μM). Subsequent mechanism studies in MDA-MB-231 cells revealed that compound 3f caused G0/G1 phase arrest and apoptosis in a dose dependent manner. Moreover, the loss of mitochondrial membrane potential and enhancement of cellular ROS levels were also observed upon 3f treatment, which indicated that 3f exerted cytotoxic activity by a ROS-mediated mitochondrial apoptosis pathway. This result was confirmed by a significant increase in the expression of pro-apoptotic proteins Bax, cytochrome C and caspase-3, and downregulation of anti-apoptosis protein Bcl-2. Overall, 3f can be adopted for further investigation in the development of antitumor agents based on natural products.
研究领域:
肿瘤学
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药理学
·
细胞生物学
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DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）