Assessment the value of Pyroptosis-Associated Gasdermin family genes in hepatocellular carcinoma: A Multi-Omics Comprehensive Analysis.

Background: Hepatocellular carcinoma (HCC) is one of the common primary cancers of the liver worldwide and leading cause of mortality. Gasdermins (GSDMs) family genes play an important role in the regulation of the normal physiological processes and have been implicated in multiple diseases. However, little is known about the relationship between different GSDMs proteins and HCC. The aim of this study was to explore the potential relationship between the expression, prognosis, genetic variation and immune infiltration of GSDMs family genes and HCC. Methods: We used different bioinformatics common public databases such as GSCA, GEPIA, UALCAN, HPA, Kaplan-Meier Plotter, LinkedOmics, GeneMANIA, STRING, cBioPortal, TIMER and TISIDB to analyze the differential expression of the different GSDMs, prognostic value, genetic alterations, immune cell infiltration and their functional networks in HCC patients. Results: All the members of the GSDMs family exhibited elevated mRNA expression levels in LIHC compared to the normal tissues, while only GSDMB, GSDMD and GSDME showed enhanced protein expression. The mRNA expression of most GSDMs members was found to be elevated in HCC patients at stages I-III (clinical stage) compared to the normal subjects. The expression of GSDMD was correlated with OS and DSS of patients, whereas GSDME was correlated with OS, DSS and RFS of patients. Gene amplification was observed to be main mode of variation in members of the GSDMs family. KEGG pathway analysis showed that genes associated with different members of the GSDMs family were enriched in the pathways of S. aureus infection, intestinal immunity, ribosome and protein assembly, oxidative phosphorylation, osteoclast differentiation and Fc gamma (γ) R-mediated phagocytosis. In addition, expression of both GSDMA and GSDME were found to be correlated most significantly with infiltration of immune cells, while GSDMA and GSDME somatic cell copy number alteration (CAN) were correlated significantly with the infiltration of immune cells. All GSDMs were noted to be associated with distinct subtypes of immune cells, except GSDMC. Conclusions: Our findings have provided useful insights to better understand the roles and functions of GSDMs in HCC that can provide novel direction for developing therapeutic modalities for HCC, including immunotherapy.

The moderating roles of peer pressure and family economic stress in the longitudinal links between adolescent trait anger and cyberbullying perpetration.

In adolescence, individuals are at high risk for cyberbullying perpetration. Although the role of trait anger in cyberbullying perpetration has attracted attention in the research literature, it is unclear the temporal sequence between trait anger and adolescents' cyberbullying perpetration and whether stressful environments could interact synergistically with trait anger to create a profile of the particularly severe risk to adolescents' cyberbullying perpetration. This study contributed to existing knowledge by examining the longitudinal and reciprocal relationships between trait anger and cyberbullying perpetration and exploring whether peer pressure and family economic stress would moderate these relationships across 2 years (3 time points) with a cohort of Chinese adolescents (N = 2,407, Mage = 12.75 at baseline). The cross-lagged model revealed that prior trait anger was associated with later self-reported cyberbullying perpetration (ßT1 → T2 = 0.09 and ßT2 → T3 = 0.10), whereas earlier self-reported cyberbullying perpetration was not associated with subsequent trait anger. Peer pressure moderated the link between trait anger and self-reported cyberbullying perpetration. Family economic stress did not play a moderating role in the link between trait anger and self-reported cyberbullying perpetration. Findings suggest that cyberbullying perpetration prevention and intervention programs should attach importance to adolescents' trait anger and the way of getting along with their peers. (PsycInfo Database Record (c) 2023 APA, all rights reserved).

Does public health policy quality foster state innovation capacity? Evidence from a global panel data.

The design and implementation of public health policy may shape state innovation capacity with governance effectiveness, political stability, and government integrity. Previous studies, however, failed to incorporate these relationships simultaneously. This study aims to combine two distinct scholarships to examine whether the quality of policies in the public health sector contributes to state innovation capacity. We extracted data from the WHO international health regulatory dataset covering the WHO Member States between 2010 and 2017 to investigate the relationship (N = 145). Our fixed-effects models and regression discontinuity design (RDD) suggest a positive impact of public health policy quality on state innovation capacity. There are several contributions to the study of the relationship between public health and innovation in this study. Firstly, it fills a theoretical void concerning the relationship between policy development and implementation in the public health sector and country-specific innovations. Second, it provides an empirical quantitative analysis of policy quality in the public health sector. Third, this study contributes evidence that public health plays an important role in fostering state innovation beyond urbanization, investment in science and technology, and foreign trade. Furthermore, our quasi-experimental evidence found that this mechanism may be significant only between the more politically stable countries and the most politically stable countries. These contributions have empirical implications for governments across the world that seek to balance public health and innovation capacity in the context of the post-pandemic era.

Can Volunteering Buffer the Negative Impacts of Unemployment and Economic Inactivity on Mental Health? Longitudinal Evidence from the United Kingdom.

Previous research suggests that volunteering can mitigate the negative mental health impacts of unemployment but has yielded mixed results. This study extends the previous literature by examining whether volunteering can buffer the negative impacts of both unemployment and economic inactivity on mental health. Using nationally representative panel data from the United Kingdom Longitudinal Household Study (2010-2020) and fixed effects models, this study yields three important findings: First, volunteering cannot mitigate the adverse effects of unemployment, regardless of gender. Second, frequent volunteering (at least once per month) can benefit the mental health of economically inactive groups (e.g., family care and long-term sickness). Third, the study reveals the gendered patterns of the impacts of volunteering. Specifically, frequent volunteering can buffer the negative impacts of family care or long-term sickness for men, and the negative impacts of unpaid work for women. Overall, these findings contribute towards a more nuanced understanding of the buffering role of volunteering and its gendered patterns. Policymakers should offer more volunteering opportunities and training to these economically inactive groups to reduce their risk of mental issues.

Liver T1 relaxation time of the 'normal liver' in healthy Asians: measurement with MOLLI and B1-corrected VFA methods at 3T.

OBJECTIVES: Liver T1 is a potential magnetic resonance imaging biomarker for liver diseases. This study aimed to determine the T1 relaxation time of the normal liver (PDFF<5%) in healthy Asian volunteers using modified look-locker inversion recovery (MOLLI) and B1 inhomogeneity-corrected variable flip angle (B1-corrected VFA). METHODS: 60 healthy Asian volunteers without focal or diffuse liver disease underwent a liver scan at 3T magnetic resonance. Proton density fat fraction (PDFF) and liver stiffness measurements were applied for the quantification of liver fat and fibrosis. T1 mapping was performed with MOLLI and B1-corrected VFA sequences. Bland-Altman, linear regression, Student t-test, and one-way analysis of variance were used for statistical analysis. RESULTS: The mean T1 relaxation times of the whole liver were 901 ± 34 ms by MOLLI, and 948 ± 29 ms by B1-corrected VFA in healthy volunteers. There was a strong correlation (r = 0.86, p < 0.0001) for liver T1 between two T1 mapping methods. There were significant differences between the right and left lobes in liver T1 relaxation times using both methods (p < 0.05). Gender and Asian ethnic disparities had no impact on liver T1 relaxation times. CONCLUSION: T1 relaxation times of the normal liver (PDFF<5%) in healthy volunteers were established by MOLLI and B1-corrected VFA T1 mapping methods at 3T. It may provide suitable and robust baseline values for the assessment of liver diseases. ADVANCES IN KNOWLEDGE: Gender and Asian ethnic disparities do not impact liver T1 relaxation time measurements.

Psychometric Assessment of the Mandarin Version of the Decisional Conflict Scale with Pregnant Women Making Prenatal Test Decisions.

PURPOSE: Women with high-risk pregnancies are often required to make choices about further prenatal testing for Down syndrome, but the decisional conflict they face is poorly understood. This study aimed to test the validity and reliability of the Mandarin version of the decisional conflict scale (M-DCS) in Chinese women with high-risk pregnancies making choices about further prenatal testing for Down syndrome. PATIENTS AND METHODS: A methodological study was conducted to determine the psychometric properties of the M-DCS, specially, reliability and content, construct, and concurrent validity. The convenience sample comprised 240 pregnant women with high risk for Down syndrome attending the out-patient clinic of the study hospital in Guangzhou, China. RESULTS: The five-factor model of M-DCS was supported by confirmatory factor analysis with a satisfactory fit to the data (RMSEA <0.08, RMR <0.05, GFI, CFI, NFI, and IFI all >0.90, except AGFI=0.88 PNFI = 0.76). The internal consistency of the M-DCS was high, with Cronbach's α of 0.94. CONCLUSION: The reliability and validity (content, construct, and concurrent) of the M-DCS were all demonstrated as good. This instrument is an important tool for researchers and health-care providers working with women with high-risk pregnancies who need to make choices about further prenatal testing for Down syndrome.

Microplastics pollution in China water ecosystems: a review of the abundance, characteristics, fate, risk and removal.

Microplastics pollution has been a focus for researchers in recent years worldwide, for the large quantities of plastics in production and the resistance to degradation. China's microplastics pollution attracts much attention because of its long coastline, large population and rapid economic development. This review addresses the widespread microplastics pollution in China's water ecosystems through available research results from recent years and analyses the abundance, characteristics, fate and risk of microplastics. This paper also discusses the current treatment technology of microplastics. The conclusions show that estuaries are severely affected by microplastics pollution; the accumulation of microplastics and adsorption of contaminants by microplastics could also lead to serious risks besides ingestion; there are few technologies that can efficiently remove microplastics pollution in sewage treatment plants. Finally, this review suggests directions for future research trends.

Modeling of lactose enzymatic hydrolysis using Monte Carlo method

Background: Mathematical modeling is useful in the analysis, prediction, and optimization of an enzymatic process. Unlike the conventional modeling methods, Monte Carlo method has special advantages in providing representations of the molecule's spatial distribution. However, thus far, Monte Carlo modeling of enzymatic system is namely based on unimolecular basis, not suitable for practical applications. In this research, Monte Carlo modeling is performed for enzymatic hydrolysis of lactose for the purpose of real-time applications. Results: The enzyme hydrolysis of lactose, which is conformed to Michaelis­Menten kinetics, is modeled using the Monte Carlo modeling method, and the simulation results prove that the model predicts the reaction kinetics very well. Conclusions: Monte Carlo modeling method can be used to model enzymatic reactions in a simple way for real-time applications.

Impact of International Immigration on Life Satisfaction of Local Residents in England: Exploring the Differentiated Relationships across Socioeconomic Gradients.

Objectives: Large-scale influxes of international immigrants into England have stimulated heated debate about whether the increasing ethnic diversity has undermined local residents' life satisfaction and wellbeing. In this paper, we provide the first nationally representative evidence on the relationship between international immigration and local residents' life satisfaction in England. Methods: We used multilevel linear regression models to analyze nationally representative data (2011-2012) from 23,143 respondents and neighborhood level data from the 2011 Census. Results: The results show that the local share of international immigrants who arrived in 2010-2011, in particular the non-white immigrants, has a significantly adverse impact on local people's life satisfaction. Further analysis shows that the adverse impact of migration is particularly pronounced for local residents who do not have a job or from intermediate social class. Conclusions: This study enables a better understanding of the link between international immigration and life satisfaction, highlighting the need of public policies to be more targeted to areas that experienced great influxes of international immigrants by facilitating positive interactions and communication between international immigrants and the local residents.

A review of midwifery in mainland China: Contemporary developments within historical, economic and sociopolitical contexts.

BACKGROUND: With the recent surging economic and social development in China, midwifery has undergone transformation. AIM: A narrative review of literature relating to midwifery in mainland China was undertaken to examine the characteristics of midwifery's potential development within relevant historical, economic and sociopolitical contexts. The aim was to assist future planning and the setting of strategic directions in policy in China. METHODS: Online bibliographic databases from 2000 to 2015 were searched including MEDLINE, WanFang Data and Chinese National Knowledge Infrastructure. A process of narrative synthesis was used to analyse the selected papers and major issues were identified. RESULTS: Twenty-one papers were included in the review. Two overarching issues were identified in relation to midwifery in mainland China: the history and status of midwifery education; and the practice and regulation of the midwifery profession. In recent decades, midwifery education, regulation and practice have occurred within systems that view midwifery as a specialisation of nursing. This means that there continues to be little opportunity for midwives to practise according to the international definition and scope of practice of the midwife. CONCLUSION: Midwifery in China must continue to develop in parallel with international trends. Investment in midwifery education alone will not suffice; it will have to operate within strong government policy regarding regulation, effective human resources management, visibility of the role of the midwife and development of the service delivery environment in which future midwives will work in China.

CBCT-based bone quality assessment in decompression of large odontogenic cystic lesions.

OBJECTIVES: Bone quality comprises bone mineral density and trabecular microstructure. The aim of this study was to explore the effectiveness of cone-beam computed tomography (CBCT) in evaluating bone quality of large odontogenic cystic lesions after decompression using CBCT and BoneJ software, and to determine whether secondary definitive surgery can be guided using CBCT data. METHODS: Twenty-seven patients with large odontogenic cystic lesions treated by decompression were evaluated by CBCT. Medical history and perioperative details were analyzed. RESULTS: The [Formula: see text]CT values for all patients with cystic lesions decreased after decompression, with no differences for age, sex, and histology (p > 0.05). Bone volume fraction and trabecular number of new cancellous bone (0.012%, 0.17/mm3) were lower than those of normal cancellous bone (0.189%, 0.47/mm3) (p < 0.05), while new cancellous bone trabecular separation (11.344 ± 2.556 mm) was stronger than normal cancellous bone trabecular separation (4.833 ± 2.232 mm) (p < 0.05). There were no differences in trabecular thickness between new cancellous bone (3.812 ± 1.593 mm) and normal cancellous bone (4.598 ± 3.573 mm) (p = 0.746). The [Formula: see text]CT values of five patients with favorable osteogenesis were - 72, -86, - 86, -47, and - 55, those of three patients with moderate osteogenesis were - 107, -120, and - 71, and those of two patients with poor osteogenesis were - 165 and - 127 during secondary definitive surgery. CONCLUSIONS: CBCT is considered beneficial for evaluating bone quality of large odontogenic cystic lesions after decompression, while providing potentially useful information for referral to secondary definitive surgery.

Burden and Strain among Familial Caregivers of Patients with Dementia in China.

BACKGROUND: Alzheimer's disease is one of a variety of progressive and ultimately fatal neurodegenerative diseases that are characterized by a number of nervous and mental symptoms and behavior disorders. These problems are likely to cause burden and strain on caregivers. In this study, we demonstrated the level and relationship of burden and strain among caregivers of dementia patients in China. METHODS: A total of 212 caregivers of family members with dementia responded to the survey. A 22-item of the Zarit Burden Interview and a 13-item Caregiver Strain Index (CSI) were used. RESULTS: The results showed that women comprised 88.2% of caregivers, and 58.5% of caregivers reported a level of medium burden. Over one-half of the caregivers reported a level of high strain, with the low income group being more likely to have high levels of burden and strain. CONCLUSION: Chinese familial caregivers of patients with dementia experience a moderate level of burden and a high level of strain. The main strain factors that affected the burden were changes in personal plans, time demands, and emotional adjustment.

The use of a logistic regression model to develop a risk assessment of intraoperatively acquired pressure ulcer.

AIMS AND OBJECTIVES: To screen the factors of intraoperatively acquired pressure ulcer and establish a new risk assessment model of intraoperatively acquired pressure ulcer. DESIGN: This is a prospective study. METHODS: A total of 1,963 patients who received neurosurgery, orthopaedics, paediatric surgery and cardiac surgery therapy in Sichuan Academy of Medical Science and Provincial People's Hospital in China from October 2015-October 2016 were enrolled in the study, and their clinical parameters were collected. Multivariable logistic regression analysis and decision tree analysis were used to analyse and screen the factors of intraoperatively acquired pressure ulcer and establish the risk assessment model of intraoperatively acquired pressure ulcer. RESULTS: The risk factors for intraoperatively acquired pressure ulcer included the application of external force during operation (ß = 1.10, OR = 3.20), lean body mass (ß = 1.08, OR = 2.95), time of operation ≥6 hr (ß = 2.66, OR = 14.30), prone position operation (ß = 1.13, OR = 3.10), cardiopulmonary bypass during operation (ß = 1.72, OR = 5.59) and intraoperative blood loss (ß = 0.67, OR = 1.95). The new risk assessment model showed that the AUC of ROC curve was 0.897 (p < .001). According to the maximum principle of Youden's index, the sensitivity, specificity and Youden's index J of the model were 0.81, 0.88 and 0.69, respectively, when the cut-off point was set at π = 0.025. CONCLUSIONS: A new and relatively reliable assessment model for intraoperatively acquired pressure ulcer is established. RELEVANCE TO CLINICAL PRACTICE: Pressure ulcers remain a challenge in clinical nursing. A new risk assessment model of pressure ulcers that is applicable to surgical patients is highly recommended.

Maternal intention to exclusively breast feed among mainland Chinese mothers: A cross-sectional study.

OBJECTIVE: to examine postpartum maternal recall of their intentions to exclusively breast feed among breastfeeding women and identify its predictors. DESIGN AND SETTING: a cross-sectional descriptive study was conducted in a regional teaching hospital at Guangzhou, China between April 1 and July 14, 2014. PARTICIPANTS: 571 mothers who were within four days after delivery were recruited to the study. MEASUREMENTS: data were collected by four research assistants with maternal intention to breast feed data sheet, the Network Support for Breastfeeding Scale (NSBS), and a socio-demographic data sheet. FINDINGS: greater than half of the mothers (69.5%) intended to exclusively breast feed. The logistic regression analysis revealed six variables which predicted postpartum maternal recall of their intentions to exclusively breast feed. They were support from husband, being breast-fed as an infant, previous breast feeding experience, attending antenatal breast feeding class, time of decision to breast feed, and the rating of the importance of my baby's health. CONCLUSION AND IMPLICATIONS FOR PRACTICE: health care professionals could develop strategies to enhance mothers' intention to exclusively breast feed, such as providing antenatal breast feeding class on internet, a strong focus on the benefits of exclusive breast feeding on the baby's health in the education programme, and more efforts directed toward educating school-aged children and adolescents to modify societal perceptions of what are considered normal infant feeding. Mothers' husband could be encouraged in supporting exclusive breast feeding.

Predictors of breast feeding self-efficacy in the immediate postpartum period: A cross-sectional study.

OBJECTIVE: to examine breast feeding self-efficacy and identify its predictors among mainland Chinese mothers in the early postpartum period. DESIGN AND SETTING: a cross-sectional descriptive questionnaire survey was conducted in a regional teaching hospital with childbirth rate over 3000 per year at Guangzhou, China from April 1 to July 14, 2014. PARTICIPANTS: a total of 571 Chinese mothers who were within 72-96hours post partum were recruited consecutively to the study. MEASUREMENTS: data were collected by the Chinese version of the Breastfeeding Self-efficacy Scale-Short Form (BSES-SF), the Network Support for Breastfeeding Scale (NSBS) and a socio-demographic data sheet. FINDINGS: a total of 640 eligible women was approached and 571 mothers completed the study with the response rate of 89%. Mothers reported moderate level of breast feeding self-efficacy in the immediate postpartum period. The best-fit regression analysis revealed six variables that explained 43.9% of the variance in breast feeding self-efficacy in the immediate postpartum period. They were intention of breast feeding, support from husband, support from nurses/midwives, attending antenatal breast feeding classes, time from childbirth to initiate breast feeding and previous breast feeding experience. CONCLUSIONS AND IMPLICATIONS FOR PRACTICE: this study found six predictors of breast feeding self-efficacy in the immediate postpartum period. In order to increase maternal breast feeding self-efficacy level, a more women-centred approach is recommended. Mothers and fathers should be facilitated to attend antenatal classes on breast feeding. New mother' husband could be encouraged in supporting breast feeding. Nurses and midwives could encourage new mothers to initiate breast feeding as soon as possible. Further work to promote early mother-infant contact post birth, such as via skin to skin contact should also be facilitated where possible.

Effects of an interpersonal-psychotherapy-oriented postnatal programme for Chinese first-time mothers: a randomized controlled trial.

OBJECTIVE: This study aimed to investigate the effects of an interpersonal-psychotherapy-oriented postnatal psychoeducation programme on postpartum depressive symptoms, social support and maternal role competence in Chinese first-time mothers. METHOD: A randomized, controlled trial was conducted in the postnatal unit of a regional hospital in China. The intervention consisted of a 1-h education session before discharge and one telephone follow-up within the 2 weeks after discharge from the hospital. One hundred and eighty first-time Chinese mothers were randomly assigned to the study group (n=90) or the control group (n=90). Outcomes of the study included symptoms of postpartum depression, social support and maternal role competence which were measured by the Edinburgh Postnatal Depression Scale, the Perceived Social Support Scale and the Parenting Sense of Competence Scale-Efficacy subscale, respectively. RESULTS: Women receiving the postnatal psychoeducation programme had significantly fewer depressive symptoms (Mean [SD]=7.61 [3.43] versus 8.96 [4.55]; t=-2.24; p=0.026), higher level of social support (Mean [SD]=65.44 [8.43] versus 61.82 [9.99]; t=2.63; p=0.009) and better maternal role competence (Mean [SD]=35.87 [4.41] versus 32.79 [6.86]; t=3.59; p<0.001) at 6 weeks postpartum as compared with those who received routine postnatal care. CONCLUSION: An interpersonal-psychotherapy-oriented postnatal psychoeducation programme may have the potential to facilitate the Chinese first-time mothers' transition to motherhood. A larger trial is needed to test for therapist effects, a full economic evaluation, and whether the intervention is acceptable to staff and feasible to use in current practice.

Arsenic, copper, and zinc contamination in soil and wheat during coal mining, with assessment of health risks for the inhabitants of Huaibei, China.

Field studies were conducted to investigate arsenic (As), copper (Cu), and zinc (Zn) contamination in agricultural soils and wheat crops at two areas in Huaibei, China. Area A is in the proximity of Shuoli coal mine. In area B, three coal mines and a coal cleaning plant were distributed. The potential health risk of As, Cu, and Zn exposure to the local inhabitants through consumption of wheat grains was also estimated. The results showed that significantly higher (p<0.05) concentrations of As, Cu, and Zn were found in soils collected from area B than in those from area A. Arsenic concentrations in wheat sampled from area A were negatively correlated with the distance from the coal mine (p<0.001). Concentrations of Cu and Zn in wheat seedlings and grains collected from area B were significantly higher (p<0.05) than in those collected from area A, with the exception of Zn in wheat seedlings. Concentrations of Cu and Zn in most wheat grain samples were above the permissible limits of Cu and Zn in edible plants set by the Food and Agriculture Organization/World Health Organization. The hazard index of aggregate risk through consumption of wheat grains was 2.3-2.4 for rural inhabitants and 1.4-1.5 for urban inhabitants. The average intake of inorganic As for rural inhabitants in Huaibei was above 10 µg day(-1). These findings indicated that the inhabitants around the coal mine are experiencing a significant potential health risk due to the consumption of locally grown wheat.

Internet use by Chinese women seeking pregnancy-related information.

OBJECTIVE: to investigate whether and how Chinese pregnant women used the Internet to retrieve pregnancy-related information. DESIGN AND SETTING: a descriptive, cross-sectional design using a waiting-room questionnaire was employed to obtain information from Chinese pregnant women attending the antenatal clinic of a general hospital in Guangzhou, mainland China from September to October in 2011. PARTICIPANTS: a total of 335 Chinese women pregnant at least 32 weeks participated in the study with the response rate 85%. FINDINGS: the great majority of the women (91.9%) had access to the Internet. Most of them (88.7%) used it to retrieve health information and began from the beginning of the pregnancy. Fetal development and nutrition in pregnancy were the two most often mentioned topics of interest. More than half of the women regarded the information as reliable. The first most important criterion for judging the trustworthiness of web-based information was if the facts were consistent with information from other sources; the second most important criterion was if references were provided. Most (75.1%) of the women did not discuss the information they retrieved from the Internet with their health professionals. CONCLUSION: the Internet was a common source for pregnancy related information among Chinese pregnant women, the same as that in the western countries. Health professionals should be able to guide Chinese pregnant women to high-quality, web-based information and then take the opportunity to discuss this information with them during antenatal visits, consultations and childbirth education classes.

Sediment records of polycyclic aromatic hydrocarbons (PAHs) in the continental shelf of China: implications for evolving anthropogenic impacts.

Sources, compositions, and historical records of polycyclic aromatic hydrocarbons (PAHs) in sediment cores collected from the Yellow Sea and the South China Sea were analyzed to investigate the influence of anthropogenic activities. The occurrence of PAHs was mainly derived from various combustion sources, especially the combustion of biomass and domestic coal. Uniform composition of sedimentary PAHs (52-62% of phenanthrene, benzo[b]fluoranthene, indeno[1,2,3-cd]pyrene, and benzo[g,h,i]perylene) suggested air-borne mixtures intractable to degradation. The concentrations of the sum of 15 PAHs (16 priority pollutants designed by the United States Environmental Protection Agency minus naphthalene; designed as Σ(15)PAH) in Yellow Sea sediment cores were generally higher than those in the South China Sea. The profiles of Σ(15)PAH concentrations recorded in the sediment cores closely followed historical socioeconomic development in China. In general, Σ(15)PAH concentrations started to increase from the background pollution level posed by agricultural economy at the turn of 20th century. In addition, a Σ(15)PAH concentration reduction was observed during the Chinese Civil War (1946-1949) and Great Cultural Revolution (1966-1976), suggesting them as setbacks for economic development in Chinese history. Increasing PAH emissions as a result of increasing coal combustion associated with the rapid urbanization and industrialization since the implementation of the Reform and Open Policy (since 1978) accounted for the fast growth of Σ(15)PAH concentrations in sediment cores. The decline of Σ(15)PAH concentrations from subsurface maximum until sampling time was inconsistent with current-day economic development in China, and may possibly suggest emission reductions due to decreasing proportional use of domestic coal and increasing consumption of cleaner energies (natural gas and liquefied petroleum gas).

Low-cost and effective phenol and basic dyes trapper derived from the porous silica coated with hydrotalcite gel.

Novel low-cost and effective adsorbents of phenol and basic dyes were made by coating amorphous silica with hydrotalcite (HT) gel followed by soaking in alkaline solution, and the surface basic-acidic properties of resulting composites were evaluated by CO(2)-TPD, Hammett indicator method and NH(3)-TPD, respectively. Both BET surface area and microporous surface area of the composites were increased after they were soaked with alkaline solution; meanwhile the center of pore size distribution was changed from 9 to 3-4 nm. These composites efficiently captured phenol in gaseous and liquid phases, superior to mesoporous silica such as MCM-48 or SBA-15 and zeolite NaY, and the equilibrium data of gaseous adsorption could be well fitted to Freundlich model. These modified silicas also exhibited high adsorption capacity forward basic dyes such as crystal violet (CV) and leuco-crystal violet (LCV), reaching the adsorption equilibrium within 1 h and offering a new material for environment protection.