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Article ; Online: Study on the coupling coordination and obstacle factors between high-quality agricultural development and ecological construction in China

Dandan Gao

Environmental Research Communications, Vol 5, Iss 7, p

2023 Volume 075004

Abstract: This paper takes the level of high-quality agricultural development and ecological construction in 31 provinces of China from 2011 to 2021 as the research object. The coupling coordination degree model and Moran index are used to explore the coupling ... ...

Abstract	This paper takes the level of high-quality agricultural development and ecological construction in 31 provinces of China from 2011 to 2021 as the research object. The coupling coordination degree model and Moran index are used to explore the coupling coordination stage, types and spatiotemporal evolution trend of agricultural high-quality development and ecological construction in China. The obstacle model is used to determine the key obstacle factors influencing the coupling development of high-quality agricultural and ecological construction in China. The results are as follows: from 2011 to 2021, high-quality agricultural development and ecological construction in 31 provinces maintained a relatively stable growth trend. However, the coupling coordination level between the two is low, and thus such level belongs to the high-quality development lag type of primary coordination agriculture. The agricultural externality index, land yield rate and per capita rural power generation are the biggest obstacles to the coordinated development of high-quality agricultural development and ecological construction in China.
Keywords	high-quality agricultural development ; ecological construction ; coupling coordination ; obstacle factors ; temporal and spatial characteristics ; Environmental sciences ; GE1-350 ; Meteorology. Climatology ; QC851-999
Subject code	690
Language	English
Publishing date	2023-01-01T00:00:00Z
Publisher	IOP Publishing
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Agricultural total factor productivity, digital economy and agricultural high-quality development.

Dandan Gao / Xiaogang Lyu

PLoS ONE, Vol 18, Iss 10, p e

2023 Volume 0292001

Abstract: The long-term and stable development of agriculture is the key to China's economic development and social stability. Agricultural total factor productivity and the digital economy have become new kinetic energy and new engines driving agricultural high- ... ...

Abstract	The long-term and stable development of agriculture is the key to China's economic development and social stability. Agricultural total factor productivity and the digital economy have become new kinetic energy and new engines driving agricultural high-quality development. It is of great significance to verify whether there are significant spatial and threshold effects in the process of high-quality development of agriculture and to explore the intrinsic relationship between high-quality development of agriculture and agricultural total factor productivity and digital economy. This paper takes 31 provinces in China from 2011 to 2020 as the research object. The coefficient of variation method is used to estimate the comprehensive evaluation index of agricultural high-quality development and digital economy. And Dea-Malmquist index method is used to estimate agricultural total factor productivity. On this basis, the spatial Durbin model and threshold regression model are constructed to explore the spatial and threshold effects of agricultural total factor productivity, digital economy and other factors and high-quality agricultural development. The conclusion is as follows: the high-quality development of agriculture has significant spatial autocorrelation. Agricultural total factor productivity and digital economy have significant direct effect and indirect spillover effect on the high-quality development of agriculture. Agricultural total factor productivity has stage differences in each range of digital economy level, but its influence on agricultural high-quality development shows a positive state. Based on this, the paper puts forward some countermeasures to promote the high-quality development of agriculture.
Keywords	Medicine ; R ; Science ; Q
Subject code	306
Language	English
Publishing date	2023-01-01T00:00:00Z
Publisher	Public Library of Science (PLoS)
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Energy flow across soil food webs of different ecosystems

Hao Zheng / Dandan Gao / Yiqun Zhou / Jie Zhao

Geoderma, Vol 439, Iss , Pp 116666- (2023)

Food webs with complex structures support higher energy flux

2023

Abstract: Energy flux in food webs is a fundamental feature of ecosystems and an important link between biodiversity and ecosystem function. Studies of energy flow through the soil nematode food web have emerged in recent year; however, it is not clear whether and ...

Abstract	Energy flux in food webs is a fundamental feature of ecosystems and an important link between biodiversity and ecosystem function. Studies of energy flow through the soil nematode food web have emerged in recent year; however, it is not clear whether and how the nematode food web structure affects the energy flow. In this study, the structures and carbon flux of soil nematode food webs in four different ecosystems, namely, forageland, cropland, secondary forest, and grass-shrubland, were assessed. The food web structure was represented by nematode community indices such as maturity index, structure index, genus and trophic group diversity, and slope of size spectra. The results showed that carbon flux through the nematode food webs was the highest and lowest in the secondary forest and forageland, respectively. The total carbon flux of nematode food web was higher in the cropland than that in the grass-shrubland. The magnitudes of bacterial and fungal energy channels were basically equal in the forageland and secondary forest. The energy flow through the bacterial channel was greater than that through the fungal channel in the grass-shrubland, whereas the pattern was reversed in the cropland. The total carbon flux through the nematode food web, the carbon fluxes through the bacterial or fungal channel, and the energy flow uniformity were positively correlated with the nematode structure index, maturity index, and genus diversity index. The trophic group diversity and size spectra slope of nematode communities were not significantly correlated with the carbon flux. The results indicate that mature and complex soil communities support high energy flux across soil food webs.
Keywords	Soil nematodes ; Metabolic footprint ; Carbon flux ; Energy flow ; Trophic interaction ; Land use type ; Science ; Q
Subject code	590
Language	English
Publishing date	2023-11-01T00:00:00Z
Publisher	Elsevier
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Spatial Effect Analysis of Total Factor Productivity and Forestry Economic Growth

Dandan Gao / Bin Zhang / Shunlong Li

Forests, Vol 12, Iss 702, p

2021 Volume 702

Abstract: This paper takes 31 provinces in China from 2009 to 2018 as the research object. The three-stage data envelopment analysis (DEA) model was used to measure the total factor productivity of forestry, and the entropy method was used to measure the level of ... ...

Abstract	This paper takes 31 provinces in China from 2009 to 2018 as the research object. The three-stage data envelopment analysis (DEA) model was used to measure the total factor productivity of forestry, and the entropy method was used to measure the level of economic development and ecological construction. We used the global Moran index to explore the spatial correlation of forestry economic growth, and the local Moran index to explore the spatial agglomeration of forestry economic growth. On this basis, the spatial Durbin model was constructed to explore the spatial spillover effect between forestry total factor productivity and forestry economic growth. The conclusion is as follows: the total factor productivity of forestry in China is increasing continuously, and there are obvious spatial differences. Forestry economic growth has a significant spatial autocorrelation, and an overall upward trend. However, the spatial agglomeration effect was relatively weak and in the beginning stage of its formation. Total factor productivity of forestry has significant direct effect on the growth of forestry economy and forms an indirect spillover effect. Based on this, the countermeasures and suggestions to promote the benign and coordinated development of the forestry economy were put forward.
Keywords	total factor productivity ; forestry economic growth ; space effect ; Plant ecology ; QK900-989
Subject code	339 ; 910
Language	English
Publishing date	2021-05-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Urbanization Imprint on Soil Bacterial Communities in Forests and Grasslands

Dandan Gao / Ning Zhang / Shuguang Liu / Chen Ning / Xinyue Wang / Shuailong Feng

Forests, Vol 14, Iss 38, p

2022 Volume 38

Abstract: Urbanization alters land uses and creates heterogeneous environmental conditions in cities and their surroundings, which may directly or indirectly impact soil microorganisms. However, how urbanization affects soil bacterial diversity and community ... ...

Abstract	Urbanization alters land uses and creates heterogeneous environmental conditions in cities and their surroundings, which may directly or indirectly impact soil microorganisms. However, how urbanization affects soil bacterial diversity and community composition, particularly in different land use types, remains largely unknown. In this study, we collected 36 soil samples (18 forest and 18 grass soils) along a rural-suburban-urban gradient in Chang-Zhu-Tan agglomeration. The bacterial diversity and community composition were investigated using 16S rRNA gene sequencing that targeted the V3-V4 region. Our results showed that urbanization induced shifts in bacterial diversity and community composition in both forestlands and grasslands. Specifically, soil bacterial diversity was higher in urban areas than in their suburban and rural counterparts in forests and grasslands, particularly in forests, where significant increases were detected. Urbanization changed the most dominated soil bacterial community from Acidobacteria to Proteobacteria in forestland. Significant decrease and increase were observed in the relative abundance of Acidobacteria (e.g., Acidobacteriales, Acidobacteriia_Subgroup2 and Solibacterales) and Proteobacteria (e.g., Betaproteobacteriales, Myxococcales and Sphingomonadales), respectively, in the forests with increasing urbanization intensity. In contrast, Proteobacteria always dominated the soil bacterial community along the rural-suburban-urban gradient in grassland, and significant decrease and increase in Nitrospirae and Latescibacteria were induced by urbanization, respectively. In addition to urbanization and total nitrogen, total organic carbon and ratio of carbon and nitrogen were the main factors that related with the bacterial community in forest soils, whereas soil water content was the main factor related with soil bacterial community in the grasslands. Together, our results indicate that the urbanization results in shifts in bacterial community composition and diversity, but the extent ...
Keywords	urbanization ; soil bacterial community ; 16S rRNA ; land-use types ; forests ; grassland ; Plant ecology ; QK900-989
Subject code	910
Language	English
Publishing date	2022-12-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Polyoxometalate-assisted synthesis of amorphous zeolitic imidazolate for efficient electrocatalytic oxygen evolution

Yupeng Zhao / Dandan Gao / Johannes Biskupek / Ute Kaiser / Rongji Liu / Carsten Streb

Results in Chemistry, Vol 4, Iss , Pp 100568- (2022)

2022

Abstract: The development of earth-abundant element-based highly active and efficient catalysts for the oxygen evolution reaction (OER) is crucial for sustainable energy conversion technologies. In this work, we successfully used the Ni-modified Keggin-type ... ...

Abstract	The development of earth-abundant element-based highly active and efficient catalysts for the oxygen evolution reaction (OER) is crucial for sustainable energy conversion technologies. In this work, we successfully used the Ni-modified Keggin-type polyoxometalate ([PNi(H2O)W11O39]5-) as a precursor to chemically modify the zeolitic imidazolate framework ZIF 67 via a facile one-pot method. The resulting composite catalyst shows promising electrocatalytic OER performance in a 1 M aqueous KOH solution with high faradaic efficiency. Higher reactivity is observed compared with several reference composites. This synthetic approach could provide access to designing a new class of highly reactive catalysts for targeted reactions.
Keywords	Polyoxometalate ; Electrocatalysis ; Water-splitting ; Oxygen evolution reaction ; Composite ; Chemistry ; QD1-999
Language	English
Publishing date	2022-01-01T00:00:00Z
Publisher	Elsevier
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Response surface methodology for the mixed fungal fermentation of Codonopsis pilosula straw using Trichoderma reesei and Coprinus comatus

Ti Wei / Hongfu Chen / Dengyu Wu / Dandan Gao / Yong Cai / Xin Cao / Hongwei Xu / Jutian Yang / Penghui Guo

PeerJ, Vol 11, p e

2023 Volume 15757

Abstract: The objective of this study was to investigate the cellulose degradation rate (CDR) and lignin degradation rate (LDR) of Codonopsis pilosula straw (CPS) and the optimal fermentation parameters for mixed fungal fermentation. Single-factor tests were used ... ...

Abstract	The objective of this study was to investigate the cellulose degradation rate (CDR) and lignin degradation rate (LDR) of Codonopsis pilosula straw (CPS) and the optimal fermentation parameters for mixed fungal fermentation. Single-factor tests were used to study the effects of the fungal ratio (Trichoderma reesei: Coprinus comatus), fungal inoculum, corn flour content, and fermentation time on the degradation rate of cellulose and lignin. Based on the results of this experiment, the optimal fermentation factors were identified, and the effects of various factors and their interactions on the degradation rates of cellulose and lignin were further evaluated using the response surface method. The quadratic polynomial mathematical model of degradation rates of the cellulose and lignin in CPS by mixed fungus fermentation was established using Design Expert software v8.0.6. Under the optimal parameters for fungal fermentation of CPS straw (fungal ratio 4:6, fungal inoculum 8%, corn flour content 10%, fermentation time of 15 d), the CDR and LDR reached 13.65% and 10.73%, respectively. Collectively, the mixed fungal fermentation of CPS resulted in decreased lignin and cellulose content, better retention of nutrients, and enhanced fermentation quality. The results of this study indicate that fermentation using Trichoderma reesei and Coprinus comatus is a productive method for straw degradation, providing a theoretical basis for the development of CPS as feed.
Keywords	Codonopsis pilosula straw ; Trichoderma reesei ; Coprinus comatus ; Lignin degradation rate ; Medicine ; R ; Biology (General) ; QH301-705.5
Subject code	660
Language	English
Publishing date	2023-08-01T00:00:00Z
Publisher	PeerJ Inc.
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Effect of traditional Chinese medicine formula Guilu Xian on in vitro fertilization and embryo transfer outcome in older women with low prognosis

Yingjie Ma / Xianling Cao / Jingyan Song / Dandan Gao / Xinlei Wang / Li Li / Zhengao Sun

Trials, Vol 22, Iss 1, Pp 1-

study protocol for a prospective, multicenter, randomized double-blind study

2021 Volume 6

Abstract: Abstract Introduction In recent years, the prevalence of infertility has significantly increased and has become a global reproductive health problem. The female ovarian reserves have been shown to decrease progressively with an increase in age. Besides, ... ...

Abstract	Abstract Introduction In recent years, the prevalence of infertility has significantly increased and has become a global reproductive health problem. The female ovarian reserves have been shown to decrease progressively with an increase in age. Besides, the rate of embryo implantation and clinical pregnancy also decreases. Traditional Chinese medicine has been widely applied in assisted reproductive technology. It is reported to have a significant influence on improving the quality of oocytes, improving endometrial receptivity, increasing clinical pregnancy rate, reducing pregnancy-related complications, etc. Therefore, this study will investigate the effect of Guilu Xian, a traditional Chinese medicine formula on IVF-ET outcome in older women with low prognosis. Methods and analysis This trial is a prospective, multicenter, randomized double-blind clinical trial. A total of 120 infertile patients with low prognosis and receiving IVF or ICSI in 3 public hospitals in China will be randomly divided into two parallel groups: Guilu Xian group (n = 60) and placebo group (n = 60). Patients in both groups will be treated with antagonist regimens to promote ovulation, and all the patients will be required to take the medication from the 2nd to 4th day of the menstrual cycle to the day of egg retrieval. A comparison of the total number of oocytes obtained, the fertilization rate, clinical pregnancy rate, embryo quality, embryo implantation rate, and early spontaneous abortion rate between the experimental group and the placebo group will be performed. Trial registration Chinese Clinical Trials Registry ChiCTR1900028255 . Registered on 16 December 2019.
Keywords	Medicine (General) ; R5-920
Subject code	610
Language	English
Publishing date	2021-12-01T00:00:00Z
Publisher	BMC
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: The Reactivity and Stability of Polyoxometalate Water Oxidation Electrocatalysts

Dandan Gao / Ivan Trentin / Ludwig Schwiedrzik / Leticia González / Carsten Streb

Molecules, Vol 25, Iss 1, p

2019 Volume 157

Abstract: This review describes major advances in the use of functionalized molecular metal oxides (polyoxometalates, POMs) as water oxidation catalysts under electrochemical conditions. The fundamentals of POM-based water oxidation are described, together with a ... ...

Abstract	This review describes major advances in the use of functionalized molecular metal oxides (polyoxometalates, POMs) as water oxidation catalysts under electrochemical conditions. The fundamentals of POM-based water oxidation are described, together with a brief overview of general approaches to designing POM water oxidation catalysts. Next, the use of POMs for homogeneous, solution-phase water oxidation is described together with a summary of theoretical studies shedding light on the POM-WOC mechanism. This is followed by a discussion of heterogenization of POMs on electrically conductive substrates for technologically more relevant application studies. The stability of POM water oxidation catalysts is discussed, using select examples where detailed data is already available. The review finishes with an outlook on future perspectives and emerging themes in electrocatalytic polyoxometalate-based water oxidation research.
Keywords	polyoxometalate ; water oxidation catalysis ; oxygen evolution reaction ; self-assembly ; electrocatalysis ; Organic chemistry ; QD241-441
Language	English
Publishing date	2019-12-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article: Assimilation, distribution and toxicity of tetrabromobisphenol A to female Wistar rats through subchronic dermal exposure

Yu, Yunjiang / Mingdeng Xiang / Dandan Gao / Hao Ye / Qiong Wang / Yanping Zhang / Liangzhong Li / Hui Li

International biodeterioration & biodegradation. 2018 Mar., v. 128

2018

Abstract: Tetrabromobisphenol A (TBBPA) is one of the most widely used brominated flame retardants and is frequently detected in environmental and biological samples. While numerous studies have been conducted on the health effects and toxicokinetics upon oral ... ...

Abstract	Tetrabromobisphenol A (TBBPA) is one of the most widely used brominated flame retardants and is frequently detected in environmental and biological samples. While numerous studies have been conducted on the health effects and toxicokinetics upon oral exposure, few have explored other exposure routes. In the present study, TBBPA was administered to female Wistar rats for 90 days by repeated dermal exposure at 20, 60, 200 and 600 mg TBBPA/kg body weight, and subsequently the concentrations of TBBPA in serum, urine, and feces were determined. TBBPA concentration ranged between 38.26 and 115.9 μg/g lipid in serum, 0.62 and 1.02 ng/μM creatinine in urine, and 288.22 and 1815.66 μg/g in feces. Approximately 3.76–13.40% of the applied TBBPA were absorbed dermally and transported for distribution, but the amount of TBBPA detected in blood was relatively small. The majority of the TBBPA was excreted in feces after dermal exposure while small quantities of TBBPA were found in urine. No significant effects on animal growth or organ coefficients for the thymus, heart, lung, liver, kidneys, spleen, ovary, and brain were observed after subchronic dermal exposure to TBBPA. In addition, repeated dermal administration for 90 days did not induce visible skin pathologic lesions in the female Wistar rats. Our results show that the TBBPA via dermal exposure was mainly discharged through fecal route and residual concentration was low in blood, and the effects of TBBPA were not apparent in animals following subchronic dermal exposure.
Keywords	animal growth ; blood serum ; body weight ; brain ; creatinine ; dermal exposure ; feces ; females ; flame retardants ; heart ; kidneys ; lipids ; liver ; oral exposure ; pharmacokinetics ; rats ; spleen ; thymus gland ; toxicity ; urine
Language	English
Dates of publication	2018-03
Size	p. 171-176.
Publishing place	Elsevier Ltd
Document type	Article
ISSN	0964-8305
DOI	10.1016/j.ibiod.2017.09.016
Database	NAL-Catalogue (AGRICOLA)

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