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AIM: To identify the latent profiles and predictors of family management styles for children with asthma. DESIGN: This is a secondary data analysis. The demographic data of 506 primary caregivers of children with asthma and their scores of the Family Management Scale in a cross-sectional study were used. Latent profile analysis and multiple logistic regression analyses were employed. RESULTS: Three family management styles were identified: Thriving (Profile 1), Accommodating (Profile 2), and Enduring (Profile 3) Family Management Style. The child's age, gender, mother's education level, family structure, influence of illness on parents' work and family life, whether they had follow-up plans and whether their parents had read disease and health knowledge pamphlets were found to be the predictors of different styles. CONCLUSION: Three distinct family management styles exist for children with asthma. Future interventions designed to enhance family management for children with asthma should be based on their demographic characteristics and family management styles. IMPLICATIONS FOR THE PROFESSION AND PATIENT CARE: The precise classification of family management styles in this study can serve as a guide to form multi-disciplinary teams of physicians and nurses to provide individualized care and conduct in-depth research to explore the mechanisms of biomedicine and the social psychology of asthma in the future. IMPACT: This paper aims to identify the latent profiles and predictors of family management styles of children with asthma. Thriving, accommodating, and enduring family management styles were identified in this paper. Child's characteristics, family and organizational factors were the predictors of different family management styles. Findings of this paper provide guidance for physicians and nurses to offer individualized care and conduct in-depth research to explore the mechanisms of biomedicine and the social psychology of asthma in the future. REPORTING METHOD: The article was reported according to the STROBE Checklist. PATIENT OR PUBLIC CONTRIBUTION: No Patient or Public Contribution.
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Asma , Cuidadores , Humanos , Asma/psicología , Asma/terapia , Femenino , Masculino , Estudios Transversales , Niño , Cuidadores/psicología , Encuestas y Cuestionarios , Preescolar , Padres/psicología , Adulto , Familia/psicología , Adaptación PsicológicaRESUMEN
OBJECTIVE: This study aimed to develop and validate an instrument to assess the health literacy of parents of children with asthma in a Chinese context. METHODS: The preliminary Parental Health Literacy Scale for Children with Asthma (PHLSCA) was developed based on a literature review and refined to 45 items through two rounds of expert consultation using the Delphi method. A total of 481 parents of children with asthma were recruited from seven hospitals across four provinces in China between February and April 2019. Principal component analysis (PCA) and confirmatory factor analysis were conducted to evaluate the structural and construct validity of the scale. RESULTS: The development and validation processes led to a 38 items scale comprising three subscales, namely: Health Knowledge (11 items), Health Skills (19 items) and Health Behavior (8 items). The scale demonstrated good reliability, with an internal consistency of Cronbach's α = 0.956 and a split-half reliability of r = 0.887 (p < 0.01). The Item Content Validity Index (I-CVI) ranged from 0.81 to 1.00, and the Scale-CVI was 0.842. The correlation coefficients and factor analysis results indicated good construct validity, with the factors explaining 59.33% to 62.90% of the variance in each subscale. CONCLUSIONS: The final version of the questionnaire (PHLSCA) has been demonstrated to be a valid and reliable tool for assessing the health literacy of parents of Chinese children with asthma.
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OBJECTIVE: This study compares the level of quality of life (QoL) and its influencing factors on children with asthma before and during the COVID-19 pandemic. METHODS: The study carried out cross-sectional surveys on children with asthma and their parents in China before and during the epidemic. Data were collected using a demographic questionnaire, the Family Management Scale for Children with Asthma (FMSCA), and the Pediatric Asthma Quality of Life Questionnaire (PAQLQ). Participants from before the epidemic were matched by their propensity score in a 1:1 ratio with individuals from during the epidemic. The level of QoL of children with asthma was subsequently analyzed. Both univariate analysis and multiple linear regression were employed to identify the influencing factors. RESULTS: Compared to their level before the epidemic, the total score of PAQLQ and its three dimensions decreased during the epidemic. Regression analysis revealed that before the epidemic, the total score of PAQLQ was significantly associated with follow-up visits, attendance of asthma lectures, and the total score of FMSCA (p < 0.05). During the epidemic, the total score of the PAQLQ was significantly associated with three dimensions of the FMSCA (future expectation, children identity, and views of condition), and two classifications of the family management styles (FMS) (enduring and accommodating) (p < 0.05). CONCLUSION: The QoL of children with asthma deteriorated during the epidemic. Influencing factors changed during the epidemic, with more emphasis on the family environment. Future intervention strategies need to take into account the development of interactions between children and environmental forces.
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Asma , COVID-19 , Humanos , Niño , Asma/epidemiología , Calidad de Vida , Estudios Transversales , Pandemias , Encuestas y Cuestionarios , China/epidemiologíaRESUMEN
Renewable energy (RE) plays a crucial role in global energy transformation, and a thorough study of the potential impact of RE on regional carbon emissions is of great significance. This is particularly relevant to China, which needs to clarify its path to carbon reduction. Using the sample data of 30 provinces in China from 2000 to 2021, this paper uses the Granger causality test to verify the causal relationship between carbon emission intensity (CEI) and other factors. It builds a mediation effect model on this basis to explore the direct impact effect and indirect transmission path of renewable energy utilization (REU) on CEI. The results show that REU has a one-way causal relationship with CEI. REU can directly and indirectly reduce CEI by improving social wealth and changing the direction of energy investment. In addition, REU indirectly increases CEI through the transmission paths of investment in the energy industry - social affluence and industrial level-social affluence. The CEI is indirectly reduced through the conduction paths of (social affluence-Urbanization rate), (Investment in the energy industry-Urbanization rate), (Industrial level-Urbanization rate), and (Industrial level-Investment in the energy industry). These conclusions will assist policymakers in exploring targeted pathways for low-carbon power development, providing a reference for strategic and sustainable carbon reduction policies.
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Dióxido de Carbono , Carbono , Carbono/análisis , Dióxido de Carbono/análisis , Urbanización , Energía Renovable , China , Desarrollo EconómicoRESUMEN
Natural gas is regarded as the main transition energy under the carbon-neutral strategy and its main consumers are Organization for Economic Cooperation and Development countries, accounting for 44.5% of world consumption in 2021. In order to investigate the effects of technology, industry, and regions on natural gas consumption, 12 major Organization for Economic Cooperation and Development countries from three different country groups were selected in this paper to explore the consumption change. Firstly, the Logarithmetic Mean Divisia Index model is adopted to find out the driving factors. Then, the Tapio model is used to consider the decoupling state between natural gas consumption and economic growth. The results can be concluded as follows: (a) From 2000 to 2020, the technological progress effect has the biggest values of -148.86, followed by the industrial structure effect and the regional scale effect, with values of - 37.04 and 29.42, respectively. (b) From the perspective of industry view, these three effects have the largest impact on the secondary industry, followed by the tertiary industry and primary industry; (c) the regional scale effect has a positive effect on most countries, and the industrial structure effect and the regional scale effect have a negative effect on most countries; (d) the decoupling state vary differently in countries with different groups. Therefore, we concluded two policy recommendations for nature gas reduction: (a) Technological innovation is the most effective way for reducing natural gas consumption; (b) Industrial structure optimization can help save natural gas consumption.
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Despite the high prevalence, stroke remains incurable due to the limited regeneration capacity in the central nervous system. Neuronal replacement strategies are highly diverse biomedical fields that attempt to replace lost neurons by utilizing exogenous stem cell transplants, biomaterials, and direct neuronal reprogramming. Although these approaches have achieved encouraging outcomes mostly in the rodent stroke model, further preclinical validation in non-human primates (NHP) is still needed prior to clinical trials. In this paper, we briefly review the recent progress of promising neuronal replacement therapy in NHP stroke studies. Moreover, we summarize the key characteristics of the NHP as highly valuable translational tools and discuss (1) NHP species and their advantages in terms of genetics, physiology, neuroanatomy, immunology, and behavior; (2) various methods for establishing NHP focal ischemic models to study the regenerative and plastic changes associated with motor functional recovery; and (3) a comprehensive analysis of experimentally and clinically accessible outcomes and a potential adaptive mechanism. Our review specifically aims to facilitate the selection of the appropriate NHP cortical ischemic models and efficient prognostic evaluation methods in preclinical stroke research design of neuronal replacement strategies.
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Isquemia Encefálica , Accidente Cerebrovascular , Animales , Primates , Neuronas , Accidente Cerebrovascular/terapia , Isquemia Encefálica/terapia , IsquemiaRESUMEN
As an industry with immense decarbonization potential, the low-carbon transformation of the power sector is crucial to China's carbon emission (CE) reduction commitment. Based on panel data of 30 provinces in China from 2000 to 2019, this research calculates and analyzes the provincial CE intensity in electricity generation (CEIE) and its spatial distribution characteristics. Additionally, the GTWR model based on the construction explains the regional heterogeneity and dynamic development trend of each driving factor's influence on CEIE from time and space. The main results are as follows: CEIE showed a gradual downward trend in time and a spatial distribution pattern of high in the northeast and low in the southwest. The contribution of driving factors to CEIE has regional differences, and the power structure contributes most to the CEIE of the power sector, which promotes regional CE. Concurrently, most provinces with similar economic development, technological level, geographic location, or resource endowment characteristics show similar spatial and temporal trends. These detections will furnish broader insights into implementing CE reduction policies for the regional power sector.
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Dióxido de Carbono , Carbono , Carbono/análisis , Dióxido de Carbono/análisis , Electricidad , China , Desarrollo EconómicoRESUMEN
Persistent neurogenesis exists in the subventricular zone (SVZ) of the ventricles and the subgranular zone (SGZ) of the dentate gyrus of the hippocampus in the adult mammalian brain. Adult endogenous neurogenesis not only plays an important role in the normal brain function, but also has important significance in the repair and treatment of brain injury or brain diseases. This article reviews the process of adult endogenous neurogenesis and its application in the repair of traumatic brain injury (TBI) or ischemic stroke, and discusses the strategies of activating adult endogenous neurogenesis to repair brain injury and its practical significance in promoting functional recovery after brain injury.
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Hemorragia Encefálica Traumática , Encéfalo , Accidente Cerebrovascular Isquémico , Neurogénesis , Adulto , Animales , Humanos , Encéfalo/fisiología , Encéfalo/fisiopatología , Hipocampo/fisiología , Hipocampo/fisiopatología , Mamíferos/fisiología , Neurogénesis/fisiología , Hemorragia Encefálica Traumática/fisiopatología , Hemorragia Encefálica Traumática/terapia , Accidente Cerebrovascular Isquémico/fisiopatología , Accidente Cerebrovascular Isquémico/terapia , Recuperación de la Función , Médula Espinal/fisiología , Médula Espinal/fisiopatologíaRESUMEN
Available methods for differentiating stem cells into neurons require a large number of cytokines and neurotrophic factors, with complex steps and slow processes, and are inefficient to produce functional neurons and form synaptic contacts, which is expensive and impractical in clinical application. Here, we demonstrated a bioactive material, basic fibroblast growth factor (bFGF)-chitosan controlled release system, for facilitating neuronal differentiation from NSCs and the functional maturation of the induced neurons with high efficiency. We illustrated by immunostaining that the neurons derived from NSCs expressed mature immunomarkers of interneurons and excitatory neurons. And we found by patch-clamp that the induced neurons exhibited diverse electrophysiological properties as well as formed functional synapses. In vivo, we implanted bFGF-chitosan into lesion area in traumatic brain injury (TBI) mice and similarly observed abundance of neuroblasts in SVZ and the presence of newborn functional neurons in injury area, which integrated into synaptic networks. Taken together, our efficient and rapid tissue engineering approach may be a potential method for the generation of functional neuronal lineage cells from stem cells and a therapy of brain injury and disease.
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Quitosano , Células-Madre Neurales , Ratones , Animales , Factor 2 de Crecimiento de Fibroblastos/metabolismo , Preparaciones de Acción Retardada , Diferenciación Celular , Células Cultivadas , Neuronas/metabolismo , Células-Madre Neurales/metabolismoRESUMEN
An implanted neurotrophin-3 (NT3)-chitosan scaffold can recruit endogenous neural stem cells to migrate to a lesion region and differentiate into mature neurons after adult spinal cord injury (SCI). However, the identities of these newborn neurons and whether they can form functional synapses and circuits to promote recovery after paraplegia remain unknown. By using combined advanced technologies, we revealed here that the newborn neurons of several subtypes received synaptic input from the corticospinal tract (CST), rubrospinal tract (RST), and supraspinal tracts. They formed a functional neural circuit at the injured spinal region, further driving the local circuits beneath the lesion. Our results showed that the NT3-chitosan scaffold facilitated the maturation of spinal neurons and the reestablishment of the spinal neural circuit in the lesion region 12 weeks after SCI. Transsynaptic virus experiments revealed that these newborn spinal neurons received synaptic connections from the CST and RST and drove the neural circuit beneath the lesion via newly formed synapses. These re-established circuits successfully recovered the formation and function of the neuromuscular junction (NMJ) beneath the lesion spinal segments. These findings suggest that the NT3-chitosan scaffold promotes the formation of relay neural circuits to accommodate various types of brain descending inputs and facilitate functional recovery after paraplegia.
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Quitosano , Traumatismos de la Médula Espinal , Ratas , Animales , Tractos Piramidales/patología , Neuronas Motoras/patología , Paraplejía/patología , Médula Espinal , Regeneración NerviosaRESUMEN
Activation of endogenous neurogenesis by bioactive materials enables restoration of sensory/motor function after complete spinal cord injury (SCI) via formation of new relay neural circuits. The underlying wiring logic of newborn neurons in adult central nervous system (CNS) is unknown. Here, we report neurotrophin3-loaded chitosan biomaterial substantially recovered bladder function after SCI. Multiple neuro-circuitry tracing technologies using pseudorabies virus (PRV), rabies virus (RV), and anterograde adeno-associated virus (AAV), demonstrated that newborn neurons were integrated into the micturition neural circuits and reconnected higher brain centers and lower spinal cord centers to control voiding, and participated in the restoration of the lower urinary tract function, even in the absence of long-distance axonal regeneration. Opto- and chemo-genetic studies further supported the notion that the supraspinal control of the lower urinary tract function was partially recovered. Our data demonstrated that regenerated relay neurons could be properly integrated into disrupted long-range neural circuits to restore function of adult CNS.
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Herpesvirus Suido 1 , Traumatismos de la Médula Espinal , Animales , Humanos , Recién Nacido , Vejiga Urinaria , Traumatismos de la Médula Espinal/terapia , Neuronas , Médula EspinalRESUMEN
Carbon emission (CE) reduction has become the primary task of China's urban agglomerations (UAs) in achieving sustainable development goals. This paper uses a decoupling model and coupling coordination model to measure the relationship between the development levels of different types of UAs and CEs in China from 2004 to 2016. Concurrently, the geographically and temporally weighted regression model is used to explore the spatial heterogeneity of the impact of different driving factors on the CEs of UAs. The results show the following: Most UAs have the potential to further decouple CEs and economic growth. Most UAs are still in coordinated development (> 0.5). Among the service innovation UAs, the Yangtze River Delta UA has a coupling coordination of less than 0.3, while the Pearl River Delta UA has a coupling coordination of more than 0.8, showing polarization. Manufacturing and resource-based UAs are still in the grinding adaptation stage (0.5-0.8). There are apparent spatiotemporal differences in the impacts of various driving factors on the CE of UAs. The level of land urbanization and investment in fixed assets promote CEs. However, the level of population urbanization and industrial structure restrain CEs. Therefore, reducing land development and industrial transformation can be an effective means to reduce CEs in UAs. These findings will provide extensive insights for different UAs to achieve differentiated low-carbon development.
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Carbono , Urbanización , China , Desarrollo Sostenible , Industrias , Ríos , Desarrollo Económico , CiudadesRESUMEN
Spinal cord injury (SCI) is a severe damage usually leading to limb dysesthesia, motor dysfunction, and other physiological disability. We have previously shown that NT3-chitosan could trigger an acute SCI repairment in rats and non-human primates. Due to the negative effect of inhibitory molecules in glial scar on axonal regeneration, however, the role of NT3-chitosan in the treatment of chronic SCI remains unclear. Compared with the fresh wound of acute SCI, how to handle the lesion core and glial scars is a major issue related to chronic-SCI repair. Here we report, in a chronic complete SCI rat model, establishment of magnetic resonance-diffusion tensor imaging (MR-DTI) methods to monitor spatial and temporal changes of the lesion area, which matched well with anatomical analyses. Clearance of the lesion core via suction of cystic tissues and trimming of solid scar tissues before introducing NT3-chitosan using either a rigid tubular scaffold or a soft gel form led to robust neural regeneration, which interconnected the severed ascending and descending axons and accompanied with electrophysiological and motor functional recovery. In contrast, cystic tissue extraction without scar trimming followed by NT3-chitosan injection, resulted in little, if any regeneration. Taken together, after lesion core clearance, NT3-chitosan can be used to enable chronic-SCI repair and MR-DTI-based mapping of lesion area and monitoring of ongoing regeneration can potentially be implemented in clinical studies for subacute/chronic-SCI repair.
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Quitosano , Traumatismos de la Médula Espinal , Animales , Cicatriz/patología , Imagen de Difusión Tensora , Regeneración Nerviosa , Ratas , Traumatismos de la Médula Espinal/patología , Traumatismos de la Médula Espinal/terapiaRESUMEN
Muscle spindles, an important proprioceptor scattered in the skeletal muscle, participate in maintaining muscle tension and the fine regulation of random movement. Although muscle spindles exist in all skeletal muscles, explanations about the distribution and morphology of muscle spindles remain lacking for the indetermination of spindle location across muscles. In this study, traditional time-consuming histochemical technology was utilized to determine the muscle spindle anatomical and morphological characteristics in the lower extremity skeletal muscle in C57BL/6 mice. The relative distance from spindles to nerve-entry points varied from muscles in the ventral-dorsal direction, in which spindles in the lateral of gastrocnemius were not considered to be close to its nerve-entry point. In the longitudinal pattern, the domain with the highest abundance of spindles corresponded to the nerve-entry point, excluding the tibialis anterior. Spindles are mainly concentrated at the middle and rostral domain in all muscles. The results suggest a heterogeneity of the distribution of spindles in different muscles, but the distribution trend generally follows the location pattern of the nerve-entry point. Histochemical staining revealed that the spindle did not have a symmetrical structure along the equator, and this result does not agree with previous findings. Exploring the distribution and structural characteristics of muscle spindles in skeletal muscle can provide some anatomical basis for the study of muscle spindles at the molecular level and treatment of exercise-related diseases and provide a comprehensive understanding of muscle spindle morphology.
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Although autogenous nerve transplantation is the gold standard for treating peripheral nerve defects of considerable length, it still has some shortcomings, such as insufficient donors and secondary injury. Composite chitosan scaffolds loaded with controlled release of nerve growth factor can promote neuronal survival and axonal regeneration after short-segment sciatic nerve defects. However, the effects on extended nerve defects remain poorly understood. In this study, we used chitosan scaffolds loaded with nerve growth factor for 8 weeks to repair long-segment (20 mm) sciatic nerve defects in adult rats. The results showed that treatment markedly promoted the recovery of motor and sensory functions. The regenerated sciatic nerve not only reconnected with neurons but neural circuits with the central nervous system were also reconstructed. In addition, the regenerated sciatic nerve reconnected the motor endplate with the target muscle. Therefore, this novel biomimetic scaffold can promote the regeneration of extended sciatic nerve defects and reconstruct functional circuits. This provides a promising method for the clinical treatment of extended peripheral nerve injury. This study was approved by the Animal Ethics Committee of Capital Medical University, China (approval No. AEEI-2017-033) on March 21, 2017.
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OBJECTIVE: To investigate the electrophysiological properties of pyramidal neurons in mouse motor cortex during the early postnatal development. METHODS: Thirty-six mice were randomly divided into postnatal 1-, 2-, 3-Week and 1-, 2-,3-Month groups (n=6). Membrane properties, action potentials (AP) and spontaneous excitatory postsynaptic currents (sEPSCs) of motor cortex pyramidal neurons were recorded to evaluate the changes in the intrinsic electrophysilogical characteristics by using whole cell patch clamp. Pyramidal neurons and interneurons were distinguished according to the AP firing patterns. RESULTS: Comparing with interneurons, pyramidal neurons exhibited regular spiking (RS) with smaller frequency. During the period of postnatal 1 Week-3 Months, some of the intrinsic membrane properties of motor cortex pyramidal neurons changed. Compared to the 1-Week mice, the resting membrane potential (RMP) of 2-Week decreased significantly (Pï¼0.01), and the membrane input resistance (Rin) of 1-Month got a hyperpolarization (Pï¼0.01), and they showed no significant change in the next period, while the membrane capacitance (Cm) showed no significant changes during the whole postnatal development. The AP dynamic properties changed significantly during this period. Compared to the 1-Week mice, the absolute value of the AP threshold and the AP amplitude of the 3-Week increased significantly (Pï¼0.01), while the spike half width of the 2-Week decreased substantially (Pï¼0.05), and they showed no significant change in the next period. The sEPSCs frequency and amplitude of 1- Month increased significantly compared to the 1-Week mice(Pï¼0.01), while during the period of next 1 Month-3 Months, the amplitude and frequency showed no significant change. CONCLUSION: These results suggest that the motor cortex pyramidal neurons have time-specific eletrophysilogical properties during the postnatal development. The electrophysiological properties can be used as a functional index to detect the degree of neurons maturity, and as a marker to distinguish the pyramidal neurons and interneurons.
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Corteza Motora , Animales , Ratones , Células Piramidales/fisiología , Potenciales de Acción/fisiologíaRESUMEN
Muscle spindle is the key proprioceptor in skeletal muscles and plays important roles in many physiological activities, such as maintaining posture, regulating movement and controlling speed variation. It has significant clinical relevance and is emerging as a promising therapeutic target for the treatment of motor functional impairment and metabolic diseases. In this review, we summarized muscle spindle distribution and the mechanism of mechanical signal transmission, and reviewed the research progress on morphological and structural characteristics of muscle spindles.
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Husos Musculares , Músculo Esquelético , Husos Musculares/anatomía & histología , Husos Musculares/fisiología , Músculo Esquelético/fisiología , Relevancia ClínicaRESUMEN
OBJECTIVE: To identify the factors of family management affecting asthma control status in school-age children with asthma in China. METHOD: The cross-sectional descriptive study was conducted among 139 children with asthma and their parents. The age range of the children was 7 to 14 years of age (Mage = 9.85; 76.26% boys). Eight dimensions (Children Identity, View of Condition, Management Mindset, Parental Mutuality, Parenting Philosophy, Management Approach, Family Focus, Future Expectation) of the Family Management Scale for Children with Asthma (FMSCA) were used as factors of family management. The Asthma Control Test (ACT) and the Children Asthma Control Test (C-ACT) were used to measure the asthma control status of children. A parental questionnaire was used to collect information regarding demographic data of familial socioeconomic status, general data about the child, and medical services status (Follow-Up Plan, received manual of asthma education, attended a lecture on asthma) received from medical institutions. A multivariate ordinal logistic regression model was performed. RESULTS: Factors significantly associated with asthma control were "Follow-Up Plan" (OR, 2.004; 95% CI, 1.009-3.981), "Attended a Lecture on asthma" (OR, 2.586; 95% CI, 1.103-6.066) and two dimensions of the FMSCA, "Children Identity" (OR = 1.133; 95% CI, 1.024-1.254) and "Family Focus" (OR = 1.114; 95% CI, 1.007-1.232). CONCLUSION: This study shows that asthma control status of school-age children in China is related to the parents' views of their child as having a "normal condition" and the parents' satisfaction with the balance between asthma related management and other aspects of family life.
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Asma , Adolescente , Asma/terapia , Niño , China , Estudios Transversales , Femenino , Humanos , Masculino , Responsabilidad Parental , PadresRESUMEN
A three-year field experiment was conducted to analyze the effects of straw enrichment and deep incorporation on the humus composition and the structure of humic acid (HA) in black soil. The differences in the HA structure between different straw returning methods were detected by three-dimensional fluorescence spectroscopy and 13C NMR technology. The purpose of this paper is to provide a theoretical basis and data support for improving the straw returning system. Four different treatments, including no straw applied (CK), straw mulching (SCR), straw deep ploughing (MBR), and straw enrichment and deep incorporation (SEDI: harvested the corn straw from four rows together with a finger-plate rake and then crushed and buried them in one row in the 20â¼40 cm deep level in the subsoil with a wind-driven input cylindrical plough), were used in this study. Our results showed that compared to CK treatment, SEDI significantly increased the contents of organic carbon (SOC), soil humic acid carbon (HAC), fulvic acid carbon (FAC), and humin C content (HM-C) in the subsurface soil layer by 27.47%, 34.33%, 19.66%, and 31.49%, respectively. Among all the straw returning treatments, SEDI treatment had the most significant effect in increasing the contents of HEC, HAC, and FAC. Straw returning not only reduced the degree of condensation and oxidation of the HA structure but also increased the proportion of alkyl C and enhanced the hydrophobicity of the HA structure in subsurface soil. Moreover, SEDI treatment significantly increased the proportion of aliphatic C/aromatic C of the HA structure in subsurface soil and improved the aliphatic property of HA, which had a significant effect on the HA structure compared to other treatments.
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Sustainable consumption has become an important issue when the world has limited resources and deteriorating environment. Given the context, this study first examines the influence of income disparities on different environmental footprints of Chinese households. We combine the input-output model with Chinese household survey data from the China family panel studies. The results show that, on an average, the carbon dioxide (CO2), pollutants, water and energy footprints of richest families are about 4.5-5.9 times larger than that of poorest households. Furthermore, the richest families even have 9.2-11.5 times larger metal and non-metal footprints. The consumption structure change can act as a driving factor to offset the increase in CO2, pollutants, water and energy footprints brought about by income rise, since it has reduced the household footprints per unit expenditure. However, the consumption structure change may increase the metal and non-metal footprints per unit expenditure simultaneously, making the metal and non-metal footprints increase faster than the other footprints as income increases. Since environment awareness is expected as a factor to further restrain household environment footprints on the demand side, we also examine how one important component of environmental awareness-perceived seriousness of environmental problems-influences household footprints based on the Stochastic Impacts by Regression on Population, Affluence, and Technology (STIRPAT) model. While emphasizing seriousness of environmental issues can cause a slight decline in the metal and non-metal footprints, it surprisingly increases the CO2, energy, and pollutants footprints; it does not influence the water footprint. In addition, perception of the seriousness of environmental problems impacts the environmental behaviors of wealthy families more than poor families. These findings demonstrate the need to formulate policies to overcome the demand-side challenge of achieving sustainability.