Publications by authors named "H Zhang"

93,995 Publications

Selection and characterization of plant-derived alkaloids with strong antialgal inhibition: growth inhibition selectivity and inhibitory mechanism.

Harmful Algae 2022 Aug 21;117:102272. Epub 2022 Jun 21.

Beijing Key Laboratory for Source Control Technology of Water Pollution, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China; Engineering Research Center for Water Pollution Source Control & Eco-remediation, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China.

In recent years, researches on microalgae inhibition with plant-derived active substances have attracted much attention. In this study, the inhibition of six plant-derived alkaloids (neferine, isoliensinine, linensinine, nuciferine, capsaicin, and hordenine) on bloom-forming cyanobacteria Microcystis aeruginosa were investigated. The results showed that neferine and nuciferine had stronger inhibition on the growth of M. aeruginosa compared with the other four alkaloids, and the relative inhibition rate reached 91.27% and 88.70% at the concentration of 4.5 mg/L after 7 d of exposure, respectively. Different from neferine, nuciferine has no inhibition on Chlorella sp. and Tetradesmus obliquus. It also increased the diversity and species homogeneity of phytoplankton in the environmental water samples. Nuciferine decreased the contents of chlorophyll a and β-carotene in M. aeruginosa with the extension of treatment time, which was 59.40% and 31.90% of the control at the concentration of 1.04 mg/L after 48 h, respectively. After 48 h of nuciferine exposure, the values of fluorescence parameters including maximum quantum yield (Fv/Fm), actual quantum yield of PSII (Yield), non-photochemical quenching (qN and NPQ), and electron transport rates (ETR) of M. aeruginosa cells were significantly decreased and photosynthetic capacity was weakened. The superoxide dismutase (SOD), catalase (CAT), ascorbic acid (ASA), and glutathione (GSH) in the cells were significantly reduced, and the hydrogen peroxide (HO) and malonaldehyde (MDA) contents continued to accumulate, causing severe oxidative damage. Therefore, the good biological safety and strong specific inhibition of nuciferine makes it have great application prospects in the inhibition of cyanobacteria blooms.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.hal.2022.102272DOI Listing
August 2022

Responses of spatial relationships between ecosystem services and the sustainable development goals to urbanization.

Sci Total Environ 2022 Aug 6:157868. Epub 2022 Aug 6.

Laboratory for Earth Surface Processes, Ministry of Education, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China.

Ecosystem services (ES) are the important component supporting the United Nations Sustainable Development Goals (SDGs) realization. In recent decades, rapid urbanization has strongly affected the relationship between ES and SDGs, resulting in the decoupling of ES and SDGs. However, the key urbanization factors dominating the relationship between ES and SDGs are still unclear. In this study, a structural equation model was constructed to explore the impact path and its change of urbanization structure and scale factors on the relationship between ES and SDGs. The results showed that the economic urbanization structure indicator (Engel coefficient) under the influence of technology import significantly impacts the relationship between ES and SDGs in different periods. Under the influence of changes in urban and rural population, population urbanization structure indicator (labor force population proportion) had significant impact on the relationship between ES and economic SDGs, which was significantly stronger in the period of 2010-2015 than in the period of 2000-2005. Land urbanization scale indicators (construction land proportion, and protected natural area proportion) also significantly impacted the relationship between ES and SDGs. Especially for ecological SDGs, the negative impact of construction land on protected natural area increased significantly in the period of 2010-2015, which might further weaken the ES's contribution to SDGs. This study highlighted that along with the continuous transformation of China's society, the key impacts on the relationship between ES and SDGs resulted from the urbanization indicators of scale as well as structure, which provided an extensive support for the sustainable development and social transformation of developing countries and regions.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.scitotenv.2022.157868DOI Listing
August 2022

Development of an underwater networking system using bio-inspired electrocommunication.

Bioinspir Biomim 2022 Aug 9. Epub 2022 Aug 9.

College of Engineering, Peking University, Rm.232, Mechanics Buld., No.5 Yiheyuan Rd., Haidian District, Beijing, Beijing, 100871, CHINA.

Current underwater communication typically includes acoustic, optical, radio frequency, and magneto-inductive channels. Wireless sensor networks are usually built on these four channels. However, these underwater networks are vulnerable to complex aquatic environments. In nature, weakly electric fish are able to communicate electrically (called electrocommunication), which is "invisible'' to most other animals, to convey information such as species, courtship, and environmental conditions. Inspired by the electrocommunication of weakly electric fish, an artificial electrocommunication system that uses an electric induction (EI) channel has been developed recently. This paper further develops an underwater networking system using the EI channel, which addresses the solutions to collision avoidance and routing problems during electrocommunication networking. In particular, a CSMA/CA-based electrocommunication mechanism was used to solve the collision problem. Then, a single-hop underwater electrocommunication network (UEN) was established. Furthermore, a complex multi-hop UEN was implemented on the basis of the AODV routing protocol. Theoretical analysis, simulations, and experiments were conducted to demonstrate the effectiveness of the developed UEN. Extensive results show that the UEN holds the potential to serve as a complement to future underwater wireless sensor networks.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1088/1748-3190/ac8859DOI Listing
August 2022

Uncovering a new route to pain therapy.

Cell Calcium 2022 Aug 2;106:102635. Epub 2022 Aug 2.

Department of Neurobiology, Harvard Medical School, Boston, MA 02115, United States of America. Electronic address:

High-voltage-activated calcium channels (HVACCs) are promising targets for developing analgesics given their roles in controlling synaptic transmission, neuronal excitability and neuropeptide release in primary nociceptive neurons. Despite previous efforts in developing HVACCs inhibitors of various drug modalities, it remains undetermined whether targeting HVACCs directly by a gene therapy approach could lead to pain alleviation in vivo. To test this, Sun and colleagues adopted a post-translational ubiquitination-based knockdown method targeting HVACCs in primary sensory neurons. They showed ablation of HVACC currents in a subset of primary sensory neurons, dampened hyperexcitability of sensory neurons after nerve injury and reduced pain behavior with no apparent adverse effects [1]. The results open the possibility of targeting ion channels with ubiquitination-based knockdown as a promising gene therapy candidate for pain treatment in future clinical studies.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.ceca.2022.102635DOI Listing
August 2022

Debaryomyces nepalensis reduces fungal decay by affecting the postharvest microbiome during jujube storage.

Int J Food Microbiol 2022 Aug 1;379:109866. Epub 2022 Aug 1.

College of Food Science, Southwest University, Chongqing 400715, PR China; Research Center of Food Storage & Logistics, Southwest University, Chongqing 400715, PR China. Electronic address:

Microbial antagonists are effective and environmentally friendly in controlling postharvest diseases of fruit. The present study investigated the influence of D. nepalensis on epiphytic microbiome and postharvest decay of jujube. Results showed that D. nepalensis notably reduced fungal decay, maintained the fruit firmness and delayed discoloration. The epiphytic microbiome revealed that D. nepalensis changed the fungal communities, but few influence on bacterial communities were observed. D. nepalensis, as the dominant population in the treatment group, decreased the abundance of pathogenic fungi of Alternaria, Penicillium, Fusarium and Botrytis, while increased the beneficial bacteria of Pantoea. The canonical correspondence analysis revealed that Debaryomyces was negatively correlated with the decay rate, whereas Penicillium, Acremonium, Rhodosporidiobolus and Hansfordia were positively correlated. In conclusion, D. nepalensis altered the successional process of fungal and bacterial communities to reduce the decay rate of jujube during storage.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.ijfoodmicro.2022.109866DOI Listing
August 2022
-->