Frontiers in Plant Science
·
2024
·
IF 4.1
Cai Zeping,Dai Yinuo,Jin Xia,Xu Hui,Huang Zhen,Xie Zhenyu,Yu Xudong,Luo Jiajia
Plant roots are constantly prepared to adjust their growth trajectories to avoid unfavorable environments, and their ability to reorient is particularly crucial for survival. Under laboratory conditions, this continuous reorientation of the root tip is manifested as coiling or waving, which we refer to as root circumnutation. However, the effect of ambient temperature (AT) on root circumnutation remains unexplored. In this study, rice seedlings were employed to assess the impact of varying ATs on root circumnutation. The role of ethylene in mediating root circumnutation under elevated AT was examined using the ethylene biosynthesis inhibitor aminooxyacetic acid (AOA) and the ethylene perception antagonist silver thiosulfate (STS). Furthermore, transcriptome sequencing, weighted gene co-expression network analysis, and real-time quantitative PCR were utilized to analyze gene expressions in rice root tips under four distinct treatments: 25°C, 35°C, 35°C+STS, and 35°C+AOA. As a result, genes associated with ethylene synthesis and signaling (OsACOs and OsERFs), auxin synthesis and transport (OsYUCCA6, OsABCB15, and OsNPFs), cell elongation (OsEXPAs, OsXTHs, OsEGL1, and OsEXORDIUMs), as well as the inhibition of root curling (OsRMC) were identified. Notably, the expression levels of these genes increased with rising temperatures above 25°C. This study is the first to demonstrate that elevated AT can induce root circumnutation in rice via the ethylene pathway and proposes a potential molecular model through the identification of key genes. These findings offer valuable insights into the growth regulation mechanism of plant roots under elevated AT conditions.
研究领域:
植物学
·
分子生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Environmental Science & Technology Letters
·
2024
·
IF 8.9
Xiaochan An,Yaxin Xiang,Sijia Ming,Ke Zhang,Hongbing Luo,Liangqian Fan,Wancen Xie,Jinsong He
The thin-film composite (TFC) membrane is the state-of-art membrane for the nanofiltration process. The polyamide active layer of the TFC membrane formed through interfacial polymerization and temperature control during the fabrication process plays an important role in membrane permeability-selectivity. However, the commonly used ambient temperature in membrane production workshops has not been studied systematically. Here, under an ambient temperature range from 10 to 25 °C, we fabricated polyamide layers on a free interface between the aqueous phase and organic phase and on the traditional PES support interface, respectively. We observed polyamide morphologies using the infrared thermal imager for the free interface and SEM for the support interface, respectively. We found that a minor change in ambient temperature could switch the polyamide from a ridge-like to bubble-like morphology. Moreover, with increasing the temperature of the fabrication process from 10 to 25 °C, the pure water permeance exhibited a decline of 38.94%, and the monodivalent selectivity presented a 12.04-fold increase. These findings highlight that the daily ambient temperature of membrane-based enterprises should be fully considered and reasonably used to decrease the production costs in both initial site selection and membrane production stability. Additionally, the permeability-selectivity of the TFC membrane could be tailored through temperature control in a membrane production workshop.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
Acta Cardiologica Sinica
·
2018
·
IF 0.927
Li-Tan Yang,Yao-Mao Chang,Tsung-Han Hsieh,Wen-Hsuan Hou,Chung-Yi Li
Background We conducted a time-series analysis of daily ambient temperature and all-cause, cardiovascular, and respiratory disease mortality in Taiwan, which is generally neither extremely hot nor cold. Methods Data on all-cause daily mortality rates (excluding accidents, suicide, and homicide), and mortality rates due to respiratory and cardiovascular diseases between 2008 and 2010 were obtained from the Taiwan Death Registry. The daily temperature for that period was averaged from 33 monitoring stations nationwide. A generalized least square model was constructed to assess the relationship between the time-series trends of temperature and mortality, and the cross-correlation function was used to determine the possible time lag for the effect of temperature on mortality. Results As the average temperature increased, the daily all-cause (β = -0.006) and respiratory disease (β = -0.012) mortality rates decreased. On the other hand, an inverse relationship (β = -0.028) between average daily temperature and cardiovascular disease mortality was observed only for a temperature between 12.91 °C and 26.36 °C. The time lag for all-cause and cardiovascular disease mortality was similar at 4-6 days, while the lag for respiratory disease was longer at 13-16 days. Conclusions We found inverse associations between average temperature and all-cause and respiratory mortality. An inverse association between temperature and cardiovascular disease mortality was observed only from 12.91 °C to 26.36 °C.
研究领域:
流行病学
·
环境医学
·
公共卫生
·
心血管病学
·
呼吸病学
✓ 已验证
DOI
PubMed
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2013
·
IF 3.365
Danhua Yuan,Shutao Xu,Mozhi Zhang,Yingxu Wei,Xinglong Dong,Yanli He,Shuliang Xu,Zhongmin Liu,Yunpeng Xu
ZSM-2 nanorods with crystal size around 50 nm were successfully synthesized at ambient temperature (30 °C). The crystallization process of ZSM-2 zeolite under ambient temperature was studied and discussed according to the measurement of crystallization kinetic curve, and characterizations with multiple techniques, such as X-ray diffraction (XRD), scanning electron microscopy (SEM), low-temperature N 2 adsorption/desorption analysis, thermogravimetry analysis (TG) and nuclear magnetic resonance (NMR) etc. The ZSM-2 zeolite synthesized at ambient temperature presented different crystal morphologies and large specific area as compared with the sample synthesized at high temperature (100 °C). Furthermore, 29 Si MAS-NMR showed that the nanoscale ZSM-2 obtained by ambient synthesis contained more EMT phase and lower Si/Al ratio than that of micrometer-sized ZSM-2 crystals obtained at 100 °C. More interestingly, NMR and low-temperature N 2 adsorption/desorption characterizations revealed that the local environment of Al did not change much while that of Si did change a lot during the ambient crystallization process, and the micropore area increased rapidly while the micropore size distributions of the samples changed little with increasing crystallization time.
研究领域:
材料科学
·
化学工程
·
物理化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2024
·
IF 4.4
Yunqi Wang,Xinyu Tan,Xiongbo Yang,Guiguang Qi,Chao Shi,Shengyu Chen
Passive radiative cooling and solar heating have received a great deal of scholarly attention as green and sustainable ways to maintain thermal homeostasis. However, most of the current passive radiative cooling and solar heating materials are optically static and cannot adapt to seasonal dynamic weather changes. Herein, we developed an HPC/CaCl2/C dual-mode device (HCC) that autonomously senses changes in ambient temperature to switch cooling/heating modes. When the ambient temperature reaches the low critical solution temperature (LCST ≈ 37 °C) of the hydrogel, the cooling side of HCC gradually turns white to reflect sunlight and radiative cooling happens by means of a high infrared emissivity (0.97) in the atmospheric window band (8–13 μm). The heat-absorbing effect of the heated side accelerates the phase transition of the hydrogel and makes it change to the cooling mode more quickly. When the ambient temperature is higher than LCST, at an irradiance of 850 W/m2, the HCC-20 coating leads to a cavity cooling temperature of approximately 12.3 °C and the theoretical cooling power is 109.3 W/m2. When the ambient temperature is lower than the LCST, the upper hydrogel layer is transparent and HCC-20 transforms into a heating function. Under weather conditions with the irradiance of 500 W/m2 and a maximum ambient temperature of 6 °C, the average heating capacity is up to around 8 °C. The HCC dual-mode device can automatically switch between cooling and heating modes and has great application potential in fields such as buildings and automobiles, providing a favorable way to mitigate energy crises and reduce greenhouse gas emissions.
研究领域:
材料科学
·
能源技术
·
可持续发展
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
·
2023
·Vol. 35
·期 6
·04023112
·
IF 3.2
Chenman Wang,Yan Sun,Lisha Pan
A high environmental temperature can increase the apparent viscosity of high-performance concrete mixtures, causing difficulties in mixing, transporting, pumping, and molding the mixtures. Although polycarboxylate ether–based superplasticizers (PCEs) have been proven effective in reducing the apparent viscosity of cement pastes, little work has focused on how PCEs with various molecular structures affect the apparent viscosity of high-performance concrete mixtures when environmental temperature increases. In this study, a PCE (T54C3.5), which was synthesized by reacting acrylic acid (AA) and isoprenyloxypoly (ethylene glycol) ether macromonomer (TPEG) (mw=2,400 g/mol) with a ratio equal to 3.5∶1, was used as the control group. Variations on the molecular structure of T54C3.5, including different carboxylate-to-macromonomer ratios, backbone lengths, backbone compositions, side-chain lengths, and side-chain compositions, were made to investigate the effectiveness of the various PCEs in changing the apparent viscosity of an ordinary portland cement paste with the water-to-cement ratio of 0.23 at different environmental temperatures. A rotational viscometer was used to measure the apparent viscosity of cement pastes containing different PCEs, and the working mechanisms for the effective PCEs were discussed. Results showed that reducing the backbone length was more effective than the other variations in improving the viscosity-reducing ability of PCEs at all tested temperatures. The PCEs containing ester bonds were able to retain or slightly decrease the viscosity of their cement pastes when the environment temperature increased from 20°C to 40°C. Reducing the backbone length and introducing ester groups are two effective ways of improving the viscosity-reducing ability of PCEs at a high environmental temperature. Using PCEs with these structures can significantly simplify the manufacturing processes of the cement mixtures with a low water-to-cement ratio when the environmental temperature increases from 20°C to 40°C, without any special mixing or casting method.
研究领域:
土木工程
·
材料科学
·
高分子化学
·
建筑材料
✓ 已验证
DOI
高影响因子
Advanced Materials Technologies
·
2022
·Vol. 7
·期 10
·2101583
·
IF 8.856
Henghao Liu,Hongjun Kang,Xin Jia,Xianshu Qiao,Wei Qin,Xiaohong Wu
Passive daytime radiative cooling (PDRC) is a low-carbon energy technology to early achieve the “carbon neutrality” goal. Developing the commercial-like colored PDRC coatings with sub-ambient cooling performance is still a big challenge. Herein, a colored bilayer ZrO 2 -PVDF PDRC coating with sub-ambient cooling performance, self-cleaning, and good weather resistance property is first reported. The colored bilayer coating is composed of a thick ultra-white ZrO 2 -PVDF reflective layer ( R solar = 0.984) and a thin colorful layer. The obtained red bilayer ZrO 2 -PVDF PDRC coating has a high solar reflectance ( R solar = 0.950), which could realize the maximum temperature drop of 3.0 °C, and the calculated theoretical cooling power is as high as 131.66 W m −2 , showing a good sub-ambient cooling performance. Furthermore, they show a good self-cleaning property. Meanwhile, the accelerated aging tests prove that they have a good weather resistance. This work provides a low-cost, simple, and large-scale method to prepare the commercial-like colored PDRC coatings with the sub-ambient cooling performance, showing a great practical application value.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2024
·
IF 6.3
Jinpeng Lv,Ruoxin Bai
Passive radiative cooling is promising for global sustainable development due to its high energy efficiency, low emissions and non-pollution. Herein, a porous PVDF (polyvinylidene fluoride)-PMMA (polymethyl methacrylate) film with randomly distributed gadolinium gallium garnet (GGG) nanocrystals is developed by solvent volatilization-induced phase separation. The porous composite film exhibits a solar reflectance of 96.1 % and an atmospheric window emissivity of 0.952. Continuous outdoor test illustrates that the cooler owes ideal all-day sub-ambient cooling properties, with an average surface temperature 8.6 °C lower than the ambient temperature, a maximum temperature drop of 13.7 °C and a cooling power up to 81 W/m 2 . Besides, the cooler exhibits excellent flexibility, strength, and environmental stability. This work provides a new solution for achieving daytime sub-ambient radiative cooling and has the potential for a wide range of energy-saving applications.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Energy
·
2024
·
IF 9
Xiao-Jie Kang,Hui Zhang,Cheng-Yu He,Bao-Hua Liu,Yong-Zhi Zhang,Xiang-Hu Gao
Polymer-based materials emerge as promising building blocks for passive daytime radiative cooling (PDRC) due to their affordability and ease of production. Enhancing these polymers with inorganic particle doping has shown to boost their mechanical properties and light scattering ability, a result of the increased refractive index contrast with air. However, the incorporation of a single type of inorganic particle often falls short in optimizing overall performance. Herein, we introduce a novel approach by simultaneously integrating high refractive index zirconium dioxide (ZrO 2 ) and wide band gap silicon dioxide (SiO 2 ) dielectric particles into polydimethylsiloxane (PDMS) matrix. This dual-particle strategy synergistically improves the radiative cooling capabilities of the resulting photonic film. Remarkably, with a thickness of 1,000 μm, it achieves an impressive 96.7% reflection of solar irradiance , while maintaining a high emissivity of 95.2% in the atmospheric window . Under solar intensity of ∼836.7 W/m 2 , it delivers an average cooling power of 82.42 W/m 2 , achieving a substantial sub-ambient temperature drop of up to 8.26 °C. We further explored its effectiveness in enhancing freshwater collection efficiency, leveraging its radiative cooling properties. Furthermore, the photonic film also exhibits versatile properties including flexibility, hydrophobicity , thermal stability, color scalability, and weather resistance, thus enhancing its suitability for various practical applications.
研究领域:
材料科学
·
光学
·
纳米技术
·
高分子科学
·
热能工程
·
光子学
·
能源效率
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 140
·期 3
·e53327
·
IF 3.057
Yi Gao,Cuilian Wei,Shuangliang Zhao,Wei Gao,Zequan Li,Hong Li,Jianju Luo,Xianyu Song
Improving the mechanical properties of hydrogels is a prime example of their large-scale, diverse applications. Herein, we report a one-pot method for preparing a double network system hydrogel where the polyvinyl alcohol served as the first polymer backbone, acrylamide as the second network, and N, N′-Methylenebisacrylamide as the cross-linker, and the prepared hydrogels presented excellent mechanical properties with 1168% tensile strain and 598 kPa compressive strength. Through the metal–ligand bonds, an electrolyte solution containing Cu 2+ was introduced into the hydrogel, which exhibits higher water retention than other electrolyte-containing hydrogels. Specially, the hydrogel was able to retain water for 8 h under extreme dry conditions at 60°C. The GF value was calculated to be 0.124 when the strain was 0%–64.2%. Furthermore, the hydrogel flexible sensor can detect changes in ambient temperature. When the ambient temperature rises, its relative resistance also tends to rise. In conclusion, this hydrogel sensor offers great potential applications in flexible sensors.
研究领域:
材料科学
·
传感器
·
聚合物化学
·
机械工程
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Junchen Liao,Zhiqiang Ma,Shiyuan Liu,Wei Li,Xiaodan Yang,Mohamed Elhousseini Hilal,Xiang Zhou,Zhengbao Yang,Bee Luan Khoo
The utilization of hydrogels in soft electronics has led to significant progress in the field of wearable and implantable devices. However, challenges persist in hydrogel electronics, including the delicate equilibrium between stretchability and electrical conductivity, intricacies in miniaturization, and susceptibility to dehydration. Here, a lignin-polyacrylamide (Ag-LPA) hydrogel composite endowed with anti-freeze, self-adhesive, exceptional water retention properties, and high stretchability (1072%) is presented. Notably, this composite demonstrated impressive electrical conductivity at room temperature (47.924 S cm −1 ) and extremely cold temperatures (42.507 S cm −1 ). It is further proposed for microfluidic-assisted hydrogel patches (MAHPs) to facilitate customizable designs of the Ag-LPA hydrogel composite. This approach enhances water retention and offers versatility in packaging materials, making it a promising choice for enduring soft electronics applications. As a proof-of-concept, soft electronics across diverse applications and dimensions, encompassing healthcare monitoring, environmental temperature sensing, and 3D-spring pressure monitoring electronics are successfully developed. The scenery of an extremely cold environment is further extended. The conductivity of the embedded Ag-LPA hydrogel composite unveils the potential of MAHPs in polar rescue missions. It is envisioned that MAHPs will impact the development of sophisticated and tailored soft electronics, thereby forging new frontiers in engineering applications.
研究领域:
材料科学
·
生物医学工程
·
可穿戴技术
·
软机器人
·
电子学
·
环境传感
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）