24 Works

Data from: Factors affecting N-nitrosodimethylamine formation from poly(diallyldimethyl-ammonium chloride) degradation during chloramination

Siying Tan, Shaojie Jiang, Xiaoyu Li & Qiuhong Yuan
Poly (diallyldimethyl ammonium chloride) (polyDADMAC) has been shown to be an important precursor of the probable human carcinogen N-nitrosodimethylamine (NDMA) when in contact with chloramine. In this study, we conducted an orthogonal experiment design to evaluate the effects of pH values, ammonia, bromide, natural organic matter (NOM) and monochloramine dosages on the formation of NDMA from polyDADMAC during chloramination. Meanwhile, single factor experiments of pH, bromide and NOM prove the results of orthogonal experiment. The...

Data from: Effect of chemical additives on electrokinetic remediation of Cr-contaminated soil coupled with a permeable reactive barrier

Xu Yu, Faheem Muhammad, Yujie Yan, Lin Yu, Huiling Li, Xiao Huang, Binquan Jiao, Ning Lu & Dongwei Li
Chromium(Cr) contamination in soil, especially Cr(VI) has a serious threat to the environment and human health. The electrokinetic remediation (EKR) is a promising technology to remediate the Cr(VI). Therefore, EKR coupled with a permeable reactive barrier (PRB) was used to treat the Cr(VI) contaminated soil in this study. The CTMAB-Z, a modified zeolite (prepared by cetyl trimethyl ammonium bromide) alone and a mixture of CTMAB-Z and Fe(0) were used as PRB-1 and PRB-2 reactive media,...

Data from: Phenotypic effects of the nurse Thylacospermum caespitosum on dependent plant species along regional climate stress gradients

Xingpei Jiang, Richard Michalet, Shuyan Chen, Liang Zhao, Xiangtai Wang, Chenyue Wang, Lizhe An & Sa Xiao
Contrasting phenotypes of alpine cushion species have been recurrently described in several mountain ranges along small-scale topography gradients, with tight competitive phenotypes in stressful convex topography and loose facilitative phenotypes in sheltered concave topography. The consistency of phenotypic effects along large-scale climate stress gradients have been proposed as a test of the likely genetic bases of the differences observed at small-scale. Inversely, plastic phenotypic effects are more likely to vanish at some points along climate...

Data from: Study on mechanical characteristics of conductors with 3D finite element models

Jiaqiong Liu, Bo Yan, Guizao Huang, Zheyue Mou, Xin Lv & Haibing Zhang
Refined 3D finite element (FE) models of typical aluminium conductor steel reinforced (ACSR) and formed aluminium conductor steel reinforced (FACSR) with structural details to simulate their static and dynamic characteristics are proposed. Taking into account the elastoplastic behaviour of the aluminium wires, the tensile mechanical properties and coupling between tension and torsion of the two types of conductors under tensile loading are numerically investigated. Furthermore, dynamic responses of two transmission lines, in which the refined...

Masting and seed fate data of Castanopsis fargesii

Li Huang & Yongchuan Yang
Masting is a common reproductive strategy regulating seedling regeneration in many perennial plant species. The evolutionary origins and functional benefits of masting have been explained by well-supported hypotheses relating to economies of scale of seed production. Nevertheless, our understanding of the potential costs of masting for the plant seed-to-seedling transitions remains limited. We evaluated the annual seed production of Castanopsis fargesii, a dominant species of subtropical evergreen broad-leaved forests in China from 2013 to 2018....

Data from: The transcriptome response of Heliconius melpomene larvae to a novel host plant

Quan-You Yu, Shou-Min Fang, Ze Zhang & Chris D. Jiggins
In the warfare between herbivore and host plant, insects have evolved a variety of defensive mechanisms, including allelochemical transformation and excretion. Several studies have explored the transcriptome responses of insects after host plant shifts to understand these mechanisms. We investigated the plastic responses of Heliconius melpomene larvae feeding on a native host Passiflora menispermifolia and a less strongly defended nonhost species, Passiflora biflora. In total, 326 differentially expressed genes were identified, with a greater number...

Data from: Electrokinetic remediation of heavy metals from municipal solid waste incineration fly ash pretreated by nitric acid

Huilin Li, Faheem Muhammad, Yujie Yan, Manli Zhang, Binquan Jiao, Lin Yu & Dongwei Li
Municipal Solid Waste Incineration (MSWI) fly ash has high concentration of Heavy Metals (HMs) which are hazardous to environment. Moreover, it has high pH and buffering capacity which hinders the removal of HMs. Another constraining factor is considerable fraction of HMs which existe in oxidizable and reducible states. The acid pretreatment of MSWI fly ash is key solution to these problem. Therefore, current experiment is carried out to evaluate the effect of acid pretreatment of...

Transient analysis of power loss density with time-harmonic electromagnetic waves in Debye media

Jiaqi Zhong, Shan Liang, Yong Chen & Jiajia Tan
Due to the complex permittivity, it is difficult to directly clarify the transient mechanism between electromagnetic waves and Debye media. To overcome above problem, the temporal relationship between the electromagnetic waves and permittivity is explicitly derived by applying the Fourier inversion and introducing the remnant displacement. With the help of the Poynting theorem and energy conservation equation, the transient power loss density is derived to describe the transient dissipation of electromagnetic field and the mechanism...

Data from: Prediction model for aerodynamic coefficients of iced quad bundle conductors based on machine learning method

Zheyue Mou, Bo Yan, Hanxu Yang, Daoda Cai & Guizao Huang
The lift, drag and torsional moment coefficients, versus wind attack angle of iced quad bundle conductors in the cases of different conductor structure, ice and wind parameters are numerically simulated and investigated. With the Latin hypercube sampling (LHS) and numerical simulation, sampling points are designed and datasets are created. Set the number of sub-conductors, wind attack angle, bundle spacing, ice accretion angle, ice thickness, wind velocity and diameter of conductor as the input variables, a...

Data from: Evolutionary history of the angiosperm flora of China

Li-Min Lu, Ling-Feng Mao, Tuo Yang, Jian-Fei Ye, Bing Liu, Hong-Lei Li, Miao Sun, Joseph T. Miller, Sarah Mathews, Hai-Hua Hu, Yan-Ting Niu, Dan-Xiao Peng, You-Hua Chen, Stephen A. Smith, Min Chen, Kun-Li Xiang, Chi-Toan Le, Viet-Cuong Dang, An-Ming Lu, Pamela S. Soltis, Douglas E. Soltis, Jian-Hua Li & Zhi-Duan Chen
High species diversity may result from recent rapid speciation in a ‘cradle’ and/or the gradual accumulation and preservation of species over time in a ‘museum’1,2. China harbours nearly 10% of angiosperm species worldwide and has long been considered as both a museum, owing to the presence of many species with hypothesized ancient origins3,4, and a cradle, as many lineages have originated as recent topographic changes and climatic shifts—such as the formation of the Qinghai–Tibetan Plateau...

Data from: Surface modification of poly(vinylidene fluoride) hollow fibre membranes for biogas purification in a gas-liquid membrane contactor system

Pengrui Jin, Chuan Huang, Jiaxiang Li, Yadong Shen & Liao Wang
The wetting of hollow fiber membranes decreases performance of the liquid-gas membrane contactor for CO2 capture in biogas upgrading. To solve this problem, in this work, a poly(vinylidene fluoride) (PVDF) hollow fibre membrane for a liquid-gas membrane contactor was coated with a superhydrophobic layer composed of a combination of hydrophobic SiO2 nanoparticles and polydimethylsiloxane (PDMS) by the method of spray deposition. A rough layer of SiO2 deposited on the PVDF membrane resulted in an enhanced...

Data from: A novel in-situ stress measurement method based on acoustic emission kaiser effect: a theoretical and experimental study

Xin Bai, Dongming Zhang, Hao Wang, Shujian Li, Zi Rao, Shu-Jian Li & Dong-Ming Zhang
Measurement of in-situ stress is critical to understand the deformation and destruction of the underground space surrounding rock, and dynamic disaster of the coal mine. At present, with the increasing depth of mining, in-situ stress parameters is more and more important for coal mine. In this paper, a novel method for in-situ stress measurement with Kaiser effect was studied and applied in the Baijiao coal mine. First, we presented a comprehensive analysis method for the...

Data from: Meiofauna promotes litter decomposition in stream ecosystems depending on leaf species

Jingmei Yao & Fang Wang
Litter decomposition, a fundamental process of nutrient cycling and energy flow in freshwater ecosystems, is driven by a diverse array of decomposers. As an important component of the heterotrophic food web, meiofauna can provide a trophic link between leaf-associated microbes (i.e., bacteria and fungi)/plant detritus and macroinvertebrates, though their contribution to litter decomposition is not well understood. To investigate the role of different decomposer communities in litter decomposition, especially meiofauna, we compared the litter decomposition...

Data from: Tree species with conservative foliar nutrient status and strong phosphorus homeostasis are regionally abundant in subtropical forests

Hang Ci, Chao Guo, Bin Tuo, Liting Zheng, Mingshan Xu, Bile Sai, Baiyu Yang, Yongchuan Yang, Wenhui You, Enrong Yan & Johannes H.C. Cornelissen
Foliar nitrogen (N) or phosphorus (P) status and their stoichiometric homeostasis are integral parts of the plant nutrient economy that determines the success of plant species in environments where N or P limits plant growth. Despite growing evidence for higher predictability of stoichiometric homeostasis of N (HN) than that of P (HP) on plant species abundance in temperate grasslands, no previous studies explicitly examined how foliar N and P status modulate the relationships between stoichiometric...

Opinion dynamics in social network under competition: the role of influencing factors in consensus reaching

Ningning Lang, Lin Wang & Quanbo Zha
The profitability of opinion and the finiteness of individual attention have already spawned the extensive competition for individual preferences on social networks. It's quite necessary to investigate the opinion dynamics over social networks in a competitive environment. To this point, this paper develops a novel social network DeGroot model based on competition game (DGCG) to characterize the opinion evolution in a competitive opinion dynamics. Based on the DGCG model, we obtain equilibrium results in the...

Hydrodynamic-driven changes in the source and composition of sedimentary organic matter via grain size distribution in shallow lakes

Wei Li, Xiaoguang Xu, Ruijie Shi, Chengxu Lv, Huazu Liu, Wei Yang, Shenhua Qian, Megumu Fujibayashi, Zhi Zhi, Guoxiang Wang, Munehiro Nomura & Osamu Nishimura
Sediment organic matter (SOM) differs in composition and function in different size fractions in relation to material and energy flows. The hydrodynamic effects on a lake’s autochthonous (terrestrial plants) and allochthonous (microalgae, aquatic plants and bacteria) inputs and transformation, and the components of SOM are still far from clear. To elucidate the SOM composition as driven by the hydrodynamic conditions associated with sedimentary grain size, we performed an ecosystem-level investigation in the shallow lake Izunuma,...

Data from: Beneficiary feedback effects on alpine cushion benefactors become more negative with increasing cover of graminoids and in dry conditions

Richard Michalet, Christian Schöb, Sa Xiao, Liang Zhao, Tuo Chen, Li-Zhe An & Ragan M. Callaway
In facilitative interactions, the beneficiary feedback effect (BFE) has been defined as the effect of beneficiary species (facilitated species) on their benefactor. BFEs have been shown to be dependent on environmental conditions and the composition of the beneficiary community. In alpine cushion systems, BFEs are more negative with more abundant, diverse and phylogenetically aggregated communities of beneficiary species. We tested the hypothesis that the functional composition of the beneficiary communities correlates with the direction and...

Data from: Effects of plant and pollinator traits on the maintenance of a food deceptive species within a plant community

Hungchun Qu, Tal Seifan, Merav Seifan & Hongchun Qu
Model-mimic plant systems are well known. However, the conditions promoting the existence of such systems are still an enigma. We suggest that by focusing on floral similarity between model and mimic, reward levels offered by models, and pollinators' ability to adjust foraging accordingly, the conditions can be better understood. Using spatially-explicit modelling, we examined trait combinations that lead to the survival of deceptive species under a large range of mimic strategies, from Batesian mimicry to...

Data from: Petrophysical characterization of high-rank coal by nuclear magnetic resonance: a case study of the Baijiao coal reservoir, SW China

Dongming Zhang, Yapei Chu, Shujian Li, Yushun Yang, Xin Bai, Chen Ye & Decai Wen
To better apply nuclear magnetic resonance (NMR) to evaluate the petrophysical characterization of high-rank coal, six anthracite samples from the Bajiao coal reservoir were measured by NMR. The porosity, T2 cutoff value, permeability, and pore type were analysed using the transverse relaxation time (T2) spectrum before and after centrifugation. The results show that the T2 spectrum of water-saturated anthracite can be divided into a discontinuous and continuous trimodal distribution. According to the connectivity among pores,...

Data from: Wake-induced oscillation behavior of twin bundle conductor transmission lines

Chuan Wu, Bo Yan, Guizao Huang, Bo Zhang, Zhongbin Lv & Qing Li
A numerical method to simulate air flow around a bundle conductor line by means of FLUENT software is presented and verified by a wind tunnel test for aerodynamic characteristics of a twin bundle conductor line. The lift and drag coefficients of the leeward sub-conductor of a twin bundle conductor varying with its relative position in the wake zone to the windward one under different wind velocities are numerically determined by the presented method. A user-defined...

Decline pattern of C. fargesii and seed traits

Li Huang, Lihua Zhou, Jingmei Wang, Siwei Hu, Shenhua Qian, Dunmei Lin, Liang Zhao, Yongchuan Yang & Cheng Jin
Widespread tree defoliation and mortality rates have increased considerably in recent decades. We investigated the decline pattern of Castanopsis fargesii and examined the effects on conspecific seedling regeneration. This dataset contains the basic characteristics and tree vigor level data of 617 C. fargesii individuals (H >1.3m, identified in nine plots in a national nature reserve in Chongqing in Southwestern China), and the seed traits data of the seeds produced by decline adult trees and non-decline...

Automating the interpretation of PM2.5 time-resolved measurements using a data-driven approach

Wanyu Chan, Hao Tang & Michael Sohn
The rapid development of automated measurement equipment enables researchers to collect greater quantities of time-resolved data from indoor and outdoor environments. The interpretation of the resulting data can be a time-consuming effort. This dataset contains the R code and time-resolved indoor and outdoor PM2.5 data to illustrate a machine learning approach called Random Forest (RF). The method is used to study a dataset of 836 emission events that occurred over a two-week period, each in...

Cellulose nanocrystals/graphene oxide composite for the adsorption and removal of levofloxacin hydrochloride antibiotic from aqueous solution

Junhong Tao, Jie Yang, Chengxiao Ma, Junfeng Li, Keqing Du, Zhen Wei, Cuizhong Chen, Zhaoyang Wang, Chun Zhao & Xiaoya Deng
Residual antibiotics in water are often persistent organic pollutants. The purpose of this study was to prepare a cellulose nanocrystals/graphene oxide composite (CNCs-GO) with a three-dimensional structure for the removal of the antibiotic levofloxacin hydrochloride (Levo-HCl) in water by adsorption. The Scanning Electron Microscope (SEM), Fourier Transform Infrared (FT-IR), Energy dispersive spectroscopy (EDS), X-ray Photoelectron Spectroscopy (XPS) and other characterization methods were used to study the physical structure and chemical properties of the CNCs-GO. The...

Data from: Microplastics negatively affect soil fauna but stimulate microbial activity: insights from a field-based microplastic addition experiment

Dunmei Lin, Guangrong Yang, Pengpeng Dou, Shenhua Qian, Liang Zhao, Yongchuan Yang & Nicolas Fanin
Microplastics are recognized as an emerging contaminant worldwide. Although microplastics have been shown to strongly affect organisms in aquatic environments, less is known about whether and how microplastics can affect different taxa within a soil community, and it is unclear whether these effects can cascade through soil food webs. By conducting a microplastic manipulation experiment, i.e. adding low-density polyethylene fragments in the field, we found that microplastic addition significantly affected the composition and abundance of...

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