POSTHARVEST BIOLOGY AND TECHNOLOGY
·
2025
·
IF 6.8
Saiying Han,Ling Liu,Lilei Wang,Jin Han,Yeru Ai,Huali Wang,Kaifang Zeng,Jian Ming,Lili Deng
Prunus salicina ‘Wushan plum’ is a climacteric fruit, which rapidly ripens under the action of ethylene after harvesting, resulting in quality deterioration that seriously restricts the sustainable development of the industry. In order to examine the potential role of sodium hydrosulfide (NaHS, the donor of exogenous H 2 S) in slowing down the ripening and senescence process of plum fruit, the changes in storage quality, antioxidant capacity, endogenous signals and gene expression levels were evaluated during storage at 25 °C for twelve days. The results indicated that NaHS treatment delayed the coloration of plum fruit and maintained higher firmness, titratable acid content (TA) and marketable fruit rate. Treatment with NaHS increased the activities of catalase (CAT), superoxide dismutase (SOD), glutathione reductase (GR) and ascorbate peroxidase (APX); promoted the accumulation of total phenols (TP) and ascorbic acid (AsA), and inhibited the increase in reactive oxygen species (ROS), malondialdehyde (MDA) and lipoxygenase (LOX) activity, which in turn alleviated oxidative damage. H 2 S treatment down-regulated the expression of PsACO1 and PsACS1 and inhibited the production of ethylene; up-regulated the expression of PsSiR , PsSAT , PsOASTL, and PsLCD , which in turn elevated the activities of sulfite reductase (SiR), serine acetyltransferase (SAT), O-acetylserine cleavage lyase (OASTL), and L-cysteine desulfurylase (LCD), and facilitated the accumulation of the endogenous H 2 S content; up-regulated the expression of L-Arginine synthesis-related genes and PsNOA , which increased the content of L-Arginine as well as the activity of nitric oxide synthase (NOS) and facilitated the synthesis of nitric oxide (NO). The above results indicated that NaHS could improve the antioxidant system, endogenous H 2 S, ethylene, and NO metabolism of plum, thus maintaining the storage quality of the fruit.
研究领域:
植物生理学
·
食品科学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Jiayu Feng,Lijuan Jia,Fei Wang,Xin Sun,Ping Ning,Chi Wang,Yuan Li,Kai Li
In this work, we report a novel urea-modified copper-based material (XUrea@Cu) obtained by directly calcinating a mixture of urea and copper nitrate. This material enables the efficient purification of H 2 S under dry and anaerobic conditions. The performance test results showed that the H 2 S capacity of the optimal adsorbent (2Urea@Cu) could reach 364.2 mg(H 2 S)∙g sorbent -1 , which is much superior to those of other adsorbents in the literature. Further study demonstrates that the ultra-desulfurization performance of 2Urea@Cu is mainly attributed to the extensive alkaline site, the high concentrations of active oxygen, and the abundance of oxygen vacancy; which are quite effective for capturing H 2 S (acidic and strong reducibility). Interestingly, the deactivation adsorbent (De-2Urea@Cu) is mainly composed of high-purity CuS, which means that the Urea@Cu adsorbent can simultaneously achieve efficient purification of H 2 S and recovery of sulfur resources since CuS is a valuable product. In addition, in-situ FT-IR and theoretical calculation results indicate that H 2 S molecules dissociate on the CuO(1 1 1) surface by stepwise dehydrogenation, while S combines with adjacent Cu to form CuS. The consumption of active components (CuO) and the accumulation of reaction products (CuS) are the primary reasons for the deactivation of adsorbents. Considering the simple preparation process, low cost, and excellent H 2 S adsorption activity, these urea-modified copper-based materials are very promising H 2 S adsorbents.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Wei Wu,Jingyu Long,Yuanjun Guo,Xiaotao Zu,Sean Li,Xia Xiang
A surface acoustic wave (SAW) H 2 S gas sensor based on CuO-TiO 2 p-n heterojunction film was designed and fabricated. The sensor exhibits high sensitivity to H 2 S due to the significant current response of CuO-TiO 2 film to H 2 S gas and the appropriate work point of SAW sensor based on CuO-TiO 2 composite film. The linearity change for sensor frequency shift is strongly associated with the location of work point when the H 2 S concentration increases from 1 to 300 ppm. In addition, the porosity of CuO-TiO 2 film is beneficial to the efficient adsorption for H 2 S, leading to the higher frequency shift of the sensor. The SAW sensor also shows good selectivity and stability to H 2 S with stable frequency shift under different humidity levels.
研究领域:
材料科学
·
传感器技术
·
气体检测
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Dong Wang,Rong Tan,Haibo Yu,Hong Chen,Xiao Ma,Huizhang Zhao,Xingyu Kang,Hairui Fang
Real-time monitoring of toxic and harmful hydrogen sulfide (H 2 S) is crucial in the extraction process of fossil fuels. However, in the process of detecting H 2 S, there will be difficulties in desorption, low response, poor anti-interference ability, and poor long-term stability. The multidimensional copper oxide (CuO) composite cerium oxide (CeO 2 ) was synthesized by hydrothermal method and calcination techniques, and a gas sensor with easy desorption, high response, strong anti-interference ability, and excellent long-term stability for monitoring H 2 S was effectively prepared. Through various characterization tests such as X-ray diffraction (XRD) and scanning electron microscope (SEM), it was found that the composite material has multidimensional characteristics. When detecting 100 parts per million (ppm) of H 2 S at the optimal operating temperature of 180℃, the CuO/CeO 2 gas sensor with the optimal ratio (n Cu : n Ce =1:1) showed an extremely high response (2010). At the same time, the gas sensor has extremely strong anti-interference ability and excellent long-term stability. In addition, these excellent H 2 S sensing properties are attributed to the excellent oxygen storage characteristics of CeO 2 and the synergistic effect of CuO and CeO 2 . This provides more active sites for the absorption of H 2 S. Finally, to achieve real-time monitoring and alarm of H 2 S, a portable real-time monitoring and alarm device was made. When detecting different concentrations of H 2 S, it will flash corresponding color lights and give an alarm to achieve the monitoring function and ensure the safety and health of workers. The multi-dimensional CuO/CeO 2 prepared has excellent gas sensing performance, providing a new method for H 2 S detection.
研究领域:
材料科学
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传感器技术
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环境监测
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL POLLUTION
·
2023
·
IF 8.9
Yu-Xi Feng,Peng Tian,Yu-Juan Lin,Dan-Yang Cao,Cheng-Zhi Li,Abid Ullah
The induction of disruption in the electronic transport chain by thiocyanate (SCN − ) leads to an excessive generation of reactive oxygen species (ROS) within rice ( Oryza sativa ). Hydrogen sulfide (H 2 S) assumes a crucial role as a gaseous signaling molecule, holding significant potential in alleviating SCN − -related stress. Nevertheless, there remains a dearth of understanding regarding the intricate interplay between H 2 S and ROS in Oryza sativa amidst SCN − pollution. In this investigation, a hydroponics-based experiment was meticulously devised to explore how H 2 S-mediated modifications influence the genetic feedback network governing ROS metabolism within the subcellular organelles of Oryza sativa when exposed to varying effective concentrations (EC 20 : 24 mg SCN/L; EC 50 : 96 mg SCN/L; EC 75 : 300 mg SCN/L) of SCN − . The findings unveiled the enhanced capacity of Oryza sativa to uptake SCN − under H 2 S + SCN − treatments in comparison to SCN − treatments alone. Notably, the relative growth rate (RGR) of seedlings subjected to H 2 S + SCN − exhibited a superior performance when contrasted with seedlings exposed solely to SCN − . Furthermore, the application of exogenous H 2 S yielded a significant reduction in ROS levels within Oryza sativa tissues during SCN − exposure. To elucidate the intricacies of gene regulation governing ROS metabolism at the mRNA level, the 52 targeted genes were categorized into four distinct types, namely: initial regulatory ROS generation genes (ROS-I), direct ROS scavenging genes (ROS-II), indirect ROS scavenging genes (ROS-III), and lipid oxidation genes (ROS-IV). On the whole, exogenous H 2 S exhibited the capacity to activate the majority of ROS-I ∼ ROS-IV genes within both Oryza sativa tissues at the EC 20 concentration of SCN − . However, genetic positive/negative feedback networks emphasized the pivotal role of ROS-II genes in governing ROS metabolism within Oryza sativa . Notably, these genes were predominantly activated within the cytoplasm, chloroplasts, mitochondria, peroxisomes, and the cell wall.
研究领域:
植物生理学
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分子生物学
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环境科学
·
农学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Xiang Li,Xueqian Wang,Langlang Wang,Li Yuan,Yixing Ma,Yibing Xie,Yiran Xiong,Ping Ning
The low S selectivity of catalysts for H 2 S removal significantly hinders its application in blast furnace gas desulfurization. In this study, Cu-based coconut shell biochar was modified with different types and contents of alkali species. The results showed that the S selectivity close to 100% was prolonged from 0 to 750 min. At the same time, the sulfur capacity was increased from 242.1 mg/g (before the modification) to 373.4 mg/g by using K 2 CO 3 -induced Cu-based biochar at 120 °C. In CO, H 2 O, and O 2 atmosphere, H 2 S was dissociated and oxidized to elemental S. Additionally, K 2 CO 3 exhibited an elemental S anchoring effect, making the S more stable at medium–high temperatures and weakening the reactivity of S with CO and ·O 2 – . Thus, less COS and SO 2 were generated. Moreover, the basic sites enhanced by K 2 CO 3 promoted the hydrolysis of COS to generate H 2 S, which entered the desulfurization cycle. K 2 CO 3 also showed a synergistic effect with the active components, generating more ·O 2 – to promote the oxygenation of H 2 S. The regeneration efficiency of the catalyst could be stabilized above 90%. These findings could provide guidance and reference for designing and applying desulfurization catalysts with high S selectivity and activity.
研究领域:
环境科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Sensors
·
2025
·
IF 9.1
Weizhong Tan,Lujing Zhao,Fei fei Li,Guangliang Cui,Pinhua Zhang,Changmin Shi
In this study, employing a 2D electrodeposition in situ assembly method, a high-performance H2S sensor based on a p-n type Cu2O-CuFe2O4 heterostructure ordered nanowire arrays was successfully fabricated on silicon substrates. Compared to Cu2O, Cu2O-CuFe2O4 nanowire arrays exhibits an ideal interfacial barrier structure and higher initial resistance, with a response to 10 ppm of H2S at room temperature (20 ± 3 °C) increased by 225 times and a response time reduced by over 2400 s. The sensor demonstrates exceptional sensitivity (LOD = 10 ppb; response = 234.5), selectivity, and humidity resistance (stable response ∼6000 to 10 ppm of H2S at 60–90% RH). Notably, it shows unique low-temperature-enhanced sensing, with a response of 8.365 × 104 to 10 ppm of H2S at −10 °C (vs 1.144 × 104 at 20 °C). The sensor was successfully applied to detect H2S in human oral exhaled breath, demonstrating its potential for noninvasive disease diagnosis and offering a promising approach for developing room-temperature breath analysis sensors.
研究领域:
生物医学传感器
·
呼吸诊断学
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分子诊断
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纳米医学
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转化医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2024
·Vol. 171
·期 3
·037514
·
IF 3.1
Na Zou,Xin Li,Weiwei Xu,Funa Meng,Zhaoxia Wang,Junhua Zhang,Xueliang Wang
The CuFe2O4 nanoparticles and the biomass carbon material (Bcn) were respectively synthesized by solid phase reaction method and pyrolysis method. Based on the good electrocatalytic performance of the composite of CuFe2O4 and Bcn for the oxidation of H2S, a sensor for continuous determination of H2S in real-time at lower working potential was constructed. The sensor can response to H2S in the concentration range of 5.0 nM–10.0 μM with high sensitivity, and it has good retention rate to H2S in simulated wound fluid. The use of the composite materials can avoid the deposition of sulfur as a by-product on the electrode surface, as well as avoid the interference of electroactive substances in the biological environment because the working potential of −0.2 V is lower than that used in other H2S sensors.
研究领域:
生物医学工程
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材料科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2024
·
IF 3.8
Jia Liu,Houfang Lu,Yingying Liu,Kejing Wu,Binshen Wang,Yingming Zhu,Bin Liang
As a highly toxic gas, H2S is conventionally removed via a chemical absorption process. However, the high regeneration energy is still a challenge. 1,5-Diazabicyclo[4.3.0]non-5-ene (DBN)/polyethylene glycol dimethyl ether (NHD) solution was developed as an efficient nonaqueous phase change absorbent for the removal of H2S with low energy consumption. A homogeneous DBN/NHD solution turns into two immiscible liquid phases upon the absorption of H2S, which results from the higher polarity of the product compared to that of the original solution. The loading capacity of H2S can reach 0.16 g·g–1 solvent even under a H2S partial pressure of 10 kPa at 30 °C. After absorption, more than 94% of the absorbed H2S is concentrated in the lower phase, which can be regenerated at 90 °C with an energy consumption estimated to be 1.69 GJ·t–1 H2S. The regeneration energy is 58% lower than that of 30 wt % aqueous solution of N-methyldiethanolamine. 81% of the initial H2S loading was maintained after 4 absorption–desorption cycles. In addition, the selectivity of DBN/NHD solution to absorb H2S from N2 containing H2S and CO2 or from N2 containing H2S and CH4 was investigated. It shows that the selectivity increases with the increase in the volume ratio of H2S to CO2, which can be as high as 27.8 when the ratio is 1:1. CH4 cannot be absorbed in the DBN/NHD solution in the presence of H2S and N2.
研究领域:
化学工程
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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 FLUORESCENCE
·
2024
·
IF 2.6
Wang Wenxiang,Gan Yudie,Jiang Huaqin,Fang Min,Wu Zhenyu,Zhu Weiju,Li Cun
Hydrogen sulfide (H 2 S) plays a key role in the physiology and pathology of organisms, and H 2 S in the environment is easily absorbed and harmful to health. It is of great significance to develop a probe with good selectivity, high sensitivity and good stability that can detect hydrogen sulfide inside and outside organisms. In this work, we designed a novel “turn-on” fluorescent probe CIM-SDB for the detection of H 2 S. The probe CIM-SDB used indene-carbazole as the fluorophore and 2,4-dinitrobenzenesulfonyl as the recognition site. The probe CIM-SDB exhibited high selectivity and sensitivity to H 2 S (detection limit as low as 123 nM). Moreover, the probe CIM-SDB was successfully applied to the detection of intracellular exogenous and endogenous H 2 S, and the test strips prepared by the probe CIM-SDB could realize the convenient and rapid detection of H 2 S.
研究领域:
分析化学
·
生物化学
·
环境科学
✓ 已验证
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2020
·
IF 3.232
Hongqi Chen,Wen Wang,Changchun Ji,Lun Wang
The core–shell NaGdF 4 :Yb,Er@NaGdF 4 :Yb,Nd upconversion nanoparticles (UCNPs) were successfully obtained with the method of co-precipitation, and the water-solubility of UCNPs was improved by the ligand exchange reaction between nitrosyl tetrafluoroborate (NOBF 4 ) and nanoparticles. The IR-783 dye with negative charge and NOBF 4 -UCNPs with positive charge can bind together by electrostatic action to sensitize UCNPs through the energy transfer from IR-783 to UCNPs. However, with the presence of Na 2 S (a commonly used H 2 S donor), a highly selective reaction between H 2 S and IR-783, which destoried the structure of IR-783 and blocked the energy transfer, thus led to the quenching of luminescent intensity. Based on this, a sensing system for determination of H 2 S has been constructed successfully. The linear range of H 2 S detection by this system is 0.5–15 μM, and the detection limit is 34.17 nM. Furthermore, the dye-sensitized core–shell NaGdF 4 :Yb,Er@NaGdF 4 :Yb,Nd upconversion nanoprobe was applied to real sample analysis with satisfactory results.
研究领域:
分析化学
·
纳米技术
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Chemosensors
·
2023
·Vol. 11
·期 1
·31
·
IF 4.2
Xilai Lu,Menghan Wu,Yong Huang,Jiannan Song,Yong Liu,Zhiqiao Yan,Feng Chen,Jieting Zhao,Wanping Chen
The slight but cumulative influence of impurity gases in air poses a great threat to the long-term stability of room-temperature gas sensors. Room-temperature hydrogen-sensitive Pt–SnO2composite nanoceramics of 5 wt% Pt were prepared through pressing and sintering. The response of a sample was over 10,000 after being exposed to 500 ppm H2S–20% O2–N2at room temperature, and the room-temperature hydrogen sensing capacity was seriously degraded even for samples that had aged dozens of days since H2S exposure. Mild heat treatments such as 160 °C for 10 min were found able to fully activate those H2S-exposed samples. As the peak of S 2p electron was clearly detected in H2S-exposed samples, it was proposed that for room-temperature hydrogen-sensitive Pt–SnO2composite nanoceramics, H2S exposure induced degradation results from the poisoning of Pt by H2S deposited on it, which can be removed through a mild heat treatment. Periodic mild heat treatment should be a convenient and effective measure for room-temperature metal oxide gas sensors to achieve long-term stability through preventing the accumulation of impurity gases in air deposited on them.
研究领域:
材料科学
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
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