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Obtained from Aquilaria Lam. and Gyrinops Gaertn., agarwood is a prestigious perfume and medicinal material in the world. Its primary chemical constituents and indicators of agarwood's development are 2-(2-phenylethyl)chromones (PECs). However, how PECs affect its quality, accumulation, and transformation pattern is still unclear. The present study investigated this issue by monitoring resin filling in agarwood generated by the whole-tree agarwood-inducing technique over a span of a year, observing the ethanol extract concentration at different sampling times, and statistically examining PECs in agarwood from each sampling period. In agarwood, the resin accumulated over time, except during the 4th-6th month due to the creation of a barrier layer. The relative content of total PECs demonstrated an overall increase throughout the year but a decrease from the 4th month to the 6th month, and the relative content of 19 PECs that persisted throughout the year was positively correlated with the content of ethanol extracts. In addition, the process of chromone accumulation was accompanied by the production and transformation of different types of chromones, with flindersia type 2-(2-phenylethyl)chromones, epoxy-2-(2-phenylethyl)chromones, and diepoxy-2-(2-phenylethyl)chromones being the major chromone components; in addition, the content of 5,6,7,8-tetrahydro- 2-(2-phenylethyl)chromones kept increasing after 6 months of agarwood formation. Three main trends were identified from 58 analogs of PECs, each with notable variation. The first type had the highest content at the beginning of resin formation. The second type had the highest content at 6 months and then started to decrease, and the third type had a slowly increasing content. As a whole, this study systematically investigated the accumulation of PECs during injury-induced agarwood production in A. sinensis, which is of scientific significance in resolving the transformation of PECs and revealing the secret of agarwood formation. [ABSTRACT FROM AUTHOR]

Toilet paper is widely used in residences. The low biodegradability of toilet paper's pulp fibers can cause residence sewer lines to clog, which may be due to some additives or the presence of nonwoven fiber products. In this study, the disintegration rate of toilet paper was compared against various physical factors of the toilet paper sheet. The samples were disintegrated in water at varying pH levels. In the manufacturing of toilet paper, there must be a balance between the desired softness and the necessary wet strength. Twelve commonly used brands of toilet paper were purchased locally. Physical factors of toilet paper samples such as degree of polymerization, thickness, grammage, and softness were determined. The samples were evaluated based on 9 variables using correlation and multivariate linear regression analyses. A strong positive relationship was found between the degree of disintegration of toilet tissue paper and its physical factors. These were the degree of polymerization, the grammage, thickness, and the softness. Additionally, the amount of polymers applied to toilet paper decreased the degree of softness and adversely affected the redispersion of fibers. Thus, this work supports the idea that toilet paper can contribute to clogging of residential sewerage lines. [ABSTRACT FROM AUTHOR]

In order to assess the potential of wetland plants to remediate metals from a paper mill effluent contaminated wetland site in Northeast India, 25 abundant plant species belonging to 15 different families, soil, and water samples from the sites were tested for Pb, Zn, Mg, and Fe by atomic absorption spectrophotometer. The results showed that metal accumulation by wetland plants differed among species and tissues. Plants thrived in high Pb, Zn, Mg, and Fe which indicated their tolerance. According to the criteria used for selecting plants for phytoremediation such as high metal tolerance, short life cycle, wide distribution, large shoot biomass and translocation factor (TF) >1; five species each were Mg and Fe accumulators, nine species were Pb accumulators and, eight species were Zn accumulators and the rest were excluders. Alternanthera sessilis was the only plant species that had TF > 1 for all the four metals. The study indicated great promise for phytoremediation, as these accumulators could be used in future for practical phytoremediation approaches and reduction of the risk from harmful metals to human health. [ABSTRACT FROM AUTHOR]

In this paper, a cost‐effective OLED display burn‐in compensation method on a mobile system is proposed. The sub‐pixel wise compensation map is estimated using the data‐counting approach and is reallocated to multi‐unit regional map according to amount of burn‐in details. The degraded luminance compensation is applied for the display driver IC without the additional external storage. With the optimized multi‐unit map, perceptual quality can be enhanced after compensation with limited internal memory. Experiment shows that the luminance uniformity of the degraded panel has been improved by 20% after proposed compensation with 1/16 memory space usage. [ABSTRACT FROM AUTHOR]

Abstract: Dust accumulation is one of the natural phenomena that adversely affects the performance of solar systems. Since 1942, many efforts have been made to address the severity of deposited particles like dust, water stains, carbon from smoke, pollen in agricultural regions, etc. on the efficiency reduction of solar devices, which results in additional costs either from oversizing the system or from cleaning it. Although various innovative methods have been employed to clean the surface of grimy PVs, a holistic approach needs to show the cleaning mechanism under different climate conditions. This review highlights the findings from several references in three time periods and focusing on their similarities. For scaling up the appropriate mitigation method, four different global zones are explored based on suspended particles in the air. Consequently, the pattern of dust distribution in different parts of the world is assessed and it was found that the Middle East and North Africa have the worst dust accumulation zones in the world. Finally, a set of recommendations and guidelines with regard to the different climatic zones and their characteristics are presented especially for the installers of PV or other solar devices to implement a suitable cleaning system. [Copyright &y& Elsevier]

Purpose: The paper argues that the classical Marxist theory of capitalist accumulation is inadequate to understand new forms of capitalism and their accumulation processes determined by "platforms" and "big data". Big data platforms are shaping the processes of production, labour, the price of products and market conditions. "Digital platforms" and "big data" have become an integral part of the processes of production, distribution and exchange relations. These twin pillars are central to the capitalist accumulation processes. The article argues that the classical Marxist theory of capitalist accumulation is inadequate to understand new forms of capitalism and their accumulation processes determined by "platforms" and "big data". Design/methodology/approach: As a conceptual paper, this paper follows critical methodological lineages and traditions based on non-linear historical narratives around the conceptualisation, construction and transition of the "Marxist theory of capital accumulation" in the age of platform economy. This paper follows a discourse analysis (Fairclough, 2003) to locate the way in which an artificial intelligence (AI)-led platform economy helps identify and conceptualise new forms of capitalist accumulation. It engages with Jørgensen and Phillips' (2002) contextual and empirical discursive traditions to undertake a qualitative comparative analysis by exploring a broad range of complex factors with case studies and examples from leading firms within the platform economy. Finally, it adopts two steps of "Theory Synthesis and Theory Adaptation" as outlined by Jaakkola (2020) to synthesise, adopt and expand the Marxist theory of capital accumulation under platform capitalism. Findings: This article identifies new trends and forms of data driven capitalist accumulation processes within the platform capitalism. The findings suggest that an AI led platform economy creates new forms of capitalist accumulation. The article helps to develop theoretical understanding and conceptual frameworks to understand and explain these new forms of capital accumulation. Originality/value: This study builds upon the limited theorisation on the AI and new capitalist accumulation processes. This article identifies new trends and forms of data driven capitalist accumulation processes within platform capitalism. The article helps to understand digital and platform capitalisms in the lens of digital labour and expands the theory of capitalist accumulation and its new forms in the age of datafication. While critiquing the Marxist theory of capitalist accumulation, the article offers alternative approaches for the future. [ABSTRACT FROM AUTHOR]

With the increasing demand for heavy oil, core annular flow (CAF) is an economical method to transport heavy oil, and many researchers have explored the energy-saving aspects of the CAF method. This paper presents a review of CAF energy saving and factors affecting CAF energy saving. Among them, the energy saving of CAF mainly concerns the changes in pressure drop and drag reduction efficiency; the factors affecting the energy saving of CAF mainly concern the problem of stability, the issue of restarting the pipeline system, the impact of a nozzle, the impact of fouling on the flow in the pipe, and the problem of oil–water accumulation. The aim of this paper is to provide a reference for the practical application of CAF in heavy oil transportation. [ABSTRACT FROM AUTHOR]

Ireland's economy is currently characterized by two phenomena: a highly globalized growth regime predicated on multinational corporate profit-shifting, and a domestic economy (concentrated in the capital, Dublin) experiencing severe housing crisis. This paper links these two phenomena together, and argues that they be considered as evidence of the emergence of a new accumulation regime, in which a specific mode of integration within the global economy both favours the emergence of, and embeds, particular patterns of domestic rent exploitation. To demonstrate this the paper combines a new synthesis of French régulation theory, as modified to account for transnational dynamics, with an updated reading of Gramsci's analysis of (pre-Fordist) rent exploitation, applying this framework to redefine Ireland's growth model as an emerging transnational accumulation regime of rentier character. [ABSTRACT FROM AUTHOR]

The paper incorporates the hoard of money in a simple three-department scheme of expanded reproduction. The sui-generis features of the hoard of money are briefly set out. The paper then demonstrates that due to the existence of the hoard of money, it is possible for there to be generalised over-production of all non-money commodities. The paper concludes with some suggestions for further work in this research direction. JEL classifications : B14, B24, B51, E11. [ABSTRACT FROM AUTHOR]

American finance has grown immensely profitable in the past four decades, but the precise reasons for this tremendous and sustained growth have not been sufficiently understood. The primary purpose of this paper is to explain the immense profitability of US finance by systematically examining how its sources of profit and types of profit-generating activities have changed since the onset of financialisation in the 1980s. Conceptually, the paper develops a typology of financial profit-generating activities, drawing a separation between credit intermediation, market mediation, and rentierism. Empirically, it examines the changing accumulation dynamics witnessed in US finance since the 1960s using the IRS Statistics of Income, BEA National Income and Product Accounts, and Federal Reserve Flow of Funds data. The paper identifies primary income sources for the sector as a whole and its most profitable subsectors, finding strong evidence that financial profit-making has shifted from lending to ownership and management of capital. It is argued that this transformation has fundamentally changed finance's relationship with the real economy. [ABSTRACT FROM AUTHOR]

In my paper I consider the movement of objects in „space", taking into account the idea of preserving and accumulation of change with time. I compare this view with Newton, Leibniz and Einstein's ideas of movement, space and time. To illustrate this, I represent the movement of two objects along a straight line, as well as some dependences connected to it. I also pose questions as "Why and how the things exist?" in relation to characteristics like discernibility, equality, and change. I also address faith as an integral part of science. [ABSTRACT FROM AUTHOR]

The paper challenges mainstream theories of Latin American development, showing their theoretical weaknesses and pointing to their role in ideologically mediating the region's 'truncated' capitalism. To that end, the paper presents an alternative view of Latin American development that starts by considering capitalist social reproduction as a worldwide process and regional/national politico-economic development as mediations in the structuring of global capital accumulation. Latin America's specific variety of capitalism is understood to have emerged from its original transformation by expanding European capital into a place to produce raw materials under favourable natural conditions. On the one hand, this has reduced their price and that of the labour-power directly or indirectly consuming them; on the other, it has resulted in a flow of surplus-value towards the owners of those natural conditions of production. The historical development of Latin American societies has expressed the partial overcoming of that antagonistic relationship between rent-paying capital and rent-appropriating landed property. [ABSTRACT FROM AUTHOR]

The paper is devoted to the assessment of the content of anthropogenic radionuclides in tundra landscapes of the subarctic zone of Russia. The authors of the article studied the features of accumulation and migration of anthropogenic radionuclides and identified probable sources of their entry into environmental objects. Peat samples were collected on the territory of the Kaninskaya Tundra of the Nenets Autonomous Okrug (Northwest Russia). A total of 46 samples were taken. The following parameters were determined in each peat sample: (1) activity and pollution density of anthropogenic radionuclides; (2) isotopic ratios of anthropogenic radionuclides; (3) activity ratios of each radionuclide for layers 10–20 cm and 0–10 cm. The results of the studies showed that the pollution density of the Nes River basin with the radionuclides Cs-137 and Sr-90 is up to 4.85 × 103 Bq×m−2 and 1.88 × 103 Bq×m−2, respectively, which is 2–5 times higher than the available data for the Kanin tundra, as well as for Russia and the world as a whole. The data obtained for Am-241, Pu-238, and Pu-239+240 showed insignificant activity of these radionuclides and generally correspond to the values for other tundra areas in Russia and the world. It was found that some tundra areas ("peat lowlands") are characterized by increased radionuclide content due to the process of accumulation and migration along the vertical profile. Calculations of isotope ratios Sr-90/Cs-137, Pu-238/Pu-239+240, Pu-239+240/Cs-137, Am-241/Pu-239+240 and air mass trajectories based on the HYSPLIT model showed that the main sources of anthropogenic radionuclide contamination are global atmospheric fallout and the Chernobyl accident. [ABSTRACT FROM AUTHOR]

Polycyclic aromatic hydrocarbons (PAHs), as priority organic pollutants, are capable of accumulation in plants. Phenanthrene (Phe) is one of the most abundant low-molecular-weight PAH in the environment which is commonly used as a model PAH in many phytoremediation studies and as a representative compound for all PAHs group. This paper highlights the uptake, translocation, and accumulation of Phe by growing proso millet (Panicum miliaceum L.) in a pot experiment, subjected to 500, 1000, 1500, and 2000 ppm of Phe treatment after 15 and 30 days. Phe naturally existed in P. miliaceum and its concentration showed a time-dependent reduction in treated plant tissues as well as in perlites. Phe concentration in shoots was higher than in roots. During the aging process, the uptake of Phe was diminished whereas translocation factor (TF) demonstrated an overall increasing trend among treatments. The shoot concentration factor (SCF) values were higher than those of root concentration factor (RCF) on both days 15 and 30 and the highest values for both parameters were achieved in 500 ppm of Phe. Both RCFs and SCFs generally tended to decrease with the increase of perlite Phe concentrations. These results suggested that Phe tended to transfer to the shoots and be metabolized there. The Phe concentration revealed a significant decline in all levels of treatment on both 15 (84 to 96%) and 30 (76 to 94%) days. Therefore, the presence of P. miliaceum was effective in promoting the phytoremediation of Phe polluted perlites. [ABSTRACT FROM AUTHOR]

Background: Embers, also known as firebrands, are the leading cause of building ignition during wildland–urban fires. This is attributed both to direct ignition of material on, in, or attached to the building, and indirect ignition where they ignite vegetation or other combustible material near the building, which results in a radiant heat and/or direct flame contact exposure that ignites the building. Indirect ignition of a building can occur when embers accumulate on and ignite nearby combustible fuel, resulting in radiant heat or flame constant exposure. Aims/implications: Factors that influence ember accumulation near a building include building geometry, such as flat wall and re-entrant corners, building wind angle, wind speed and the surface roughness characteristics of the horizontal landscape close to the building. Methods: Experiments conducted at the Insurance Institute for Business & Home Safety (IBHS) Research Center using full-scale buildings with the above-mentioned factors provided a means to quantify ember accumulation on a mass per unit area basis. Key results: Ember accumulation was greatest at locations immediately adjacent to the building and higher wind speeds allowed more embers to reach the building. Conclusions: The work presented in this paper provides data and insight on wind-blown ember accumulation near a full-scale building. Full-scale experiments were conducted to study the factors that influence ember accumulation near a building including building geometry, such as flat wall and re-entrant corners, building wind angle, wind speed and the surface roughness characteristics of the horizontal landscape close to the building. (This paper is part of a Special Issue that includes papers on research presented at the IX International Conference on Forest Fire Research, Coimbra, Portugal, November.) [ABSTRACT FROM AUTHOR]

This article offers a critique of the Wolfe-an model, which has become so dominant within contemporary Settler Colonial Studies (SCS). It focuses particularly on the central claim made by Patrick Wolfe, and others after him, that settler colonialism is categorically differentiated from other forms of colonialism by its drive to "eliminate the native", instead of exploiting them. This paper builds on the literature that shows how settler colonies have used elimination as well as exploitation in their relations with indigenous peoples--even transitioning from one to the other. Instead, the paper argues that focusing on accumulation by dispossession allows for an analysis of the specificity of settler social relations to emerge. It highlights the specific ways in which settlers collectively expropriate indigenous peoples and struggle amongst different settler classes over the distribution of the colonial loot. [ABSTRACT FROM AUTHOR]

This paper discusses some issues related to the triangle between capital accumulation, distribution, and capacity utilization. First, it explains why utilization is a crucial variable for the various theories of growth and distribution, and, more precisely, with regards to their ability to combine an autonomous role for demand (along Keynesian lines) and an institutionally determined distribution (along classical lines). Second, it responds to some recent criticism by Girardi and Pariboni (2019) and I explain that their interpretation of the model in Nikiforos (2013) is misguided, and that the results of the model can be extended to the case of a monopolist. Third, it provides some concrete examples on why demand is a determinant for the long‐run rate of utilization of capital. Finally, it argues that when it comes to the normal rate of utilization it is the expected growth rate of demand that matters, and not the level of demand. This insight provides a more straightforward way to link the adjustment at the micro and the macro level. [ABSTRACT FROM AUTHOR]

The mud receiving area is an important sand storage area for dredging sea sand reclamation and sand-dumping in the waterway. The sediment accumulation area generated in the process of sand dumping and sand storage has an impact on the surrounding transportation facilities and the normal use of the entire sand storage area. From 6 August 2021 to 9 May 2022, The Sentinel-1A 24-view SLC data covering the sludge area were used to monitor the safety around the seawall road by InSAR technology. Synthetic aperture radar differential interferometry (Differential InSAR, D-InSAR) technology can obtain surface micro deformation information through single-time differential interference processing, mainly used for sudden surface deformation. D-InSAR technology detected five accumulation areas with a thickness of more than 10 cm near the seawall road, earth embankment, and cofferdam, and TS-InSAR (Time series InSAR) technology was used to retrieve the deformation of the surrounding road. The road settlement is a slight settlement distributed between ±5 mm/a. This paper uses the leveling results combined with variance analysis to verify the fusion of different TS-InSAR methods while considering the area of data loss due to causes such as loss of coherence. This paper also considers the common ground continuity and uses the adjacent interpolation and bilinear interpolation algorithm to improve knowledge of the study area seawall road and the surrounding soil embankment deformation data of the road. Compared with the leveling data, the difference between the missing data and the leveling data after interpolation is stable at about 1–7 mm, which increases the risk level of part of the road which needs to be maintained. It provides a reference method to make up for the missing data caused by ground incoherence. [ABSTRACT FROM AUTHOR]

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Detailed physics of the third quadrant electrical characteristics of 1.2-kV rated 4H-SiC accumulation (Acc) and inversion (Inv) channel MOSFETs, based on experimentally measured data and TCAD numerical simulations, are described in this paper for the first time. The power MOSFETs with various channel lengths (0.3, 0.5, 0.8, 1.1 $\mu \text{m}$) used in this paper were fabricated in a 6-in commercial foundry. Numerical simulations verified that there are two current paths in the third quadrant: 1) through the base region and 2) through the p-n body diode. This paper demonstrates that the Acc MOSFETs have a smaller third quadrant knee voltage (${V}_{{\text {knee}}})$ of −1.2 V compared with −1.9 V for the Inv MOSFETs (at ${V}_{g} = {0}$ V and room temperature). Numerical simulations show that this difference is due to a smaller potential barrier for electron transport from the drain to the source in the base region for accumulation channel devices than inversion channel devices. Acc devices are shown to have a lower voltage drop in the third quadrant. [ABSTRACT FROM AUTHOR]

The paper makes three contributions. First, it provides an in‐depth examination of the Federal Reserve measure of capacity utilization and shows that it is closer to a cyclical indicator than a measure of long‐run variations of normal utilization. Other measures, such as the Average Workweek of Capital or the National Emergency Utilization Rate are more appropriate for examining long‐run changes in utilization. Second, and related to that, it argues that a relatively stationary measure of utilization is not consistent with any theory of the determination of utilization. Third, based on data on the lifetime of fixed assets it shows that for the issues around the "utilization controversy" the long run is a period after thirty years or more. This makes it a platonic idea for some economic problems. [ABSTRACT FROM AUTHOR]

The paper seeks to uncover a long-submerged tradition that saw knowledge accumulation as the main driver of development. This vision was ubiquitous until the late 18th century when, with the advent of the machine age, the focus shifted from knowledge accumulation to capital accumulation. Emphasis on knowledge did not disappear completely. Some argued that the knowledge embedded in human agents and not capital was the source of productivity gains while others emphasised the role of technological and scientific knowledge alongside capital accumulation. By the early decades of the 20th century, the economic role of science had become more salient and by the end of that century, the idea that knowledge accumulation has a central role in progress was again taken for granted. The paper suggests that by focusing the kinds of knowledge we have; and how that knowledge is stored, transmitted, made use of, and extended; we can learn much about how specific social relations of production facilitate or retard development, about who gets the rewards, and how relations of production may need to change to allow knowledge itself to develop. [ABSTRACT FROM AUTHOR]

Biogenic or microbial methane has an increasing share in the global gas resource base, though its exploration still faces challenges and welcomes innovations. Critical elements of its migration and accumulation models are the groundwater flows which gather and transport the gas in aqueous solution, and the seal rocks or aquifers which lead groundwater flows horizontally over great distances. This paper intends to introduce the hydraulic trap concept into these models, which is able to drive fluids horizontally without an overlying seal rock. Since hydraulic traps can evolve as a result of the interplay of regional groundwater flow systems, the basin-scale hydraulic evaluation methodology which was developed for the analysis of these systems was further improved by this study to focus on their interplay. The improved methodology was applied on measured hydraulic data in a study area in the Central Pannonian Basin (Hungary) around the Hajdúszoboszló gas field where as a result, the first groundwater flow controlled dissolved biogenic gas migration and accumulation model could be set up. In addition, the proposed methodology can be used in any terrestrial sedimentary basin, and in particular, where topography-driven flow systems are underlaid by an abnormal pressure regime. [ABSTRACT FROM AUTHOR]

The present paper addresses investigation of modern morphodynamic processes, which lead to relief modelling on one hand and the formation of new landforms and deposits on the other. Erosional, denudational and gravitational landforms and deposits were observed in three key areas in the Zavalska Mountain (Western Srednogorie), Strazha and Lyubash (Kraishte). The aim of this study is to trace the intensity of exogenous landforming processes, to characterize the deposits and elucidate the connection between the geological base, the topography and the local hydroclimatic conditions for their genesis and dynamics. To achieve this goal, field and laboratory methods were employed, as well as data from an automatic weather station in the territory of the Breznik Municipality. Despite the short observation period of three months, the data reveal significant dynamics, rendering the selected study areas interesting for future research. [ABSTRACT FROM AUTHOR]

The paper explores how beneficiaries of South Africa's land reform programme attempt to navigate the contradictory dynamics of production and social reproduction in collectively owned agricultural enterprises. The Mphuzanyoni Communal Property Association in KwaZulu‐Natal province farms with commercial beef herds and the Mayime Cooperative in the Eastern Cape province is engaged in a joint venture dairy farming scheme in partnership with an agribusiness firm. Severe tensions are evident between the social reproduction of households and the requirements of simple or expanded reproduction of agricultural enterprises. Bernstein's concept of competing 'funds' is used to examine struggles over production and reproduction on the farms, in which members of socially differentiated households contest divergent visions for the collective enterprises. Conflicts centre on how labour and capital should be mobilised, how income and other benefits in kind should be distributed to households and whether or not income should be invested for purposes of simple or expanded reproduction of the enterprise. Challenges of governance are rooted in these conflicts rather than in group ownership as a form of property right. [ABSTRACT FROM AUTHOR]

Accumulation of q ˜ -rung picture fuzzy information plays an essential part in decision-making situations. q ˜ -rung picture fuzzy sets can handle the uncertain information more precisely and flexibly because of the presence of parameter q ˜. Also the Frank t-norm and t-conorm operations perform suitably for the data accumulation with the operational parameter. In this paper, we introduce q ˜ -Rung picture fuzzy Frank weighted averaging operator and q ˜ -rung picture fuzzy Frank weighted geometric operator by extending q ˜ -rung orthopair fuzzy Frank arithmetic and geometric aggregation operators respectively. We establish an algorithm to address the tedious decision-making problems using these operators. Eventually, we discuss a multiple attribute decision-making problem to demonstrate the utility and efficacy of the proposed method. A comparison of existing methods is made to reveal the supremacy and benefits of our proposed method. [ABSTRACT FROM AUTHOR]

Mercury is a global pollutant that can be enriched in organisms and eventually endanger human health. In this paper, we studied the soil, plants, and animals in the sandy beach, winged alkali pong wetland, reed wetland, and rice field in Liaohe estuary in 2018 and 2019, measured the plant and animal carbon and stable nitrogen isotopes, and carried out the food chain construction by animal carbon and nitrogen stable isotopes, and studied and analyzed the accumulation of mercury from the producer to the consumer of the food chain. The results showed that the food chain construction at the sampling sites was as follows: S1: plants < flesh worms, ants < spiders; S4: plants < moths, leaf beetles, mosquitoes, ants < spiders; S6: plants < mosquitoes < spiders; S7: plants < flattened hooks, mosquitoes, ants < spiders; S9: plants < ants < spiders. The range of Hg in soil: S1: 0.087–0.175 mg/kg; S2: 0.035–0.197 mg/kg; S3: 0.089–0.249 mg/kg; S4: 0.050–0.167 mg/kg; S5: 0.024–0.150 mg/kg; S6: 0.066–0.152 mg/kg. S7: 0.035–0.165 mg/kg; S8: 0.026–0.083 mg/kg; S9: 0.035–0.191 mg/kg. The range of Hg in plant samples: S1: 0.019–0.242 mg/kg; S2: 0.019–0.161 mg/kg; S3: 0.025–0.142 mg/ kg; S4: 0.010–0.120 mg/kg; S5: 0.015–0.269 mg/kg; S6: 0.040–0.079 mg/kg; S7: 0.014–0.300 mg/kg; S8: 0.020–0.100 mg/kg; S9: 0.022–0.208 mg/kg. Constructing the food chain of In animal samples, the accumulation of Hg: S1: 0.061–0.355 mg/kg; S3: 0.082–0.198 mg/kg; S4: 0.051–0.230 mg/kg; S6: 0.032–0.449 mg/kg; S7: 0.078–0.195 mg/kg; S9: 0.086–0.189 mg/kg By comparing the data, the annual accumulation of heavy metals in soil and plant samples showed an increasing trend and combined with the trophic level relationship of the food chain, it was found that the accumulation trend of heavy metals increased step by step with the trophic level of consumers. [ABSTRACT FROM AUTHOR]

This paper addresses the alliance between some urban agriculturalists, developers, and the local state in promoting a certain type of 'green urbanism' through what we call 'impermaculture'. Impermaculture is a model of urban agriculture whereby some urban farmers approach their impermanence – the possibility of their operations being replaced by higher value developments – less as a threat to be avoided, as traditionally understood in the literature, and more as an intended modus operandi to which they are committed. We discuss how they use lightweight and portable growing containers, planter beds, greenhouses, and livestock pens to operate within and enhance contemporary regimes of development in global North cities. We identify a spatio-temporal impermanence that stands in contrast to classic understandings of sustainability fixes as either a form of greenwashing or as spatial fixes involving the sinking of capital into construction of a 'greener' built environment. In what follows, we develop a conceptual framework that will facilitate these contributions and provide a language for discussing cases of impermaculture in Portland, Oregon and Vancouver, British Columbia. We discuss how urban agriculture is mobilized as part of the sustainability fix in the two cities. We first demonstrate how impermaculture emerges as a means of stabilizing the fix which is always prone to coming apart, or fracturing. We then draw on two examples – goat husbandry in Portland and temporary gardens in Vancouver – to demonstrate how urban agriculturalists are embracing and leveraging impermanence. This 'impermaculture by design' not only marks a new form of urban agriculture in the neoliberal city but shores up and temporally rescales the sustainability fix while providing urban agriculture initiatives stability. [ABSTRACT FROM AUTHOR]