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Ischemic stroke is a common acute cerebrovascular disease in clinical practice, which poses a severe threat to human health. In recent years, with deepening understanding of ischemic stroke, significant progress has been made in the diagnosis and treatment. However, current treatments for ischemic stroke are partially limited due to extremely complex pathological mechanisms. Studies have shown that mitochondrial dysfunction plays an important role in the pathogenesis of ischemic stroke. Therefore, modulation of mitochondrial function through mitochondrial dynamics is essential to ameliorate the damage of cerebral ischemic neuronal cells. In this article, the molecular mechanism of mitochondrial dynamics and its role in ischemic stroke were reviewed, aiming to provide useful reference for the treatment of ischemic stroke. [ABSTRACT FROM AUTHOR]

Household electric vehicle charging in residential areas has a strong centrality. Large-scale electric vehicle charging load causes large peak valley load difference and other problems in the distribution network system. This study proposes a user charging selection control strategy based on Multi Objective Particle Swarm Optimization (MPSO) algorithm. Through the analysis and prediction of electric vehicle charging load, a multi-objective optimization model is established with the minimum variance of the total system load and scheduling cost as the objective function. Meanwhile, considering the constraints of electric vehicle battery and system power, the MPSO algorithm is used to solve the optimal initial charging time of electric vehicles. The simulation results show that compared with unordered charging of EVs in residential areas, the EV charging strategy proposed in this study can effectively reduce load peak and dispatch cost. [ABSTRACT FROM AUTHOR]

Objective To explore the effects and mechanism of methylglyoxal (MGO) in human brain microvascular endothelial cell line (hCMEC/D3). Methods The hCMEC/D3 cells were incubated with MGO (0.25, 0.50, 0.75, 1.00 and 1.25 mmol/L) for 24 h. Cell viability was detected by CCK-8 assay. Cellular LDH and SOD activities were determined by commercially available kits. The change of mitochondrion membrane potential was assessed by JC-1 probe. MitoSOX probe was used to observe mitochondrial reactive oxygen species (mROS) release. Results Compared with control, cell viability of hCMEC/D3 treated with MGO decreased in a concentration-dependent manner (P＜0.01). Increased LDH activity and decreased SOD activity were observed with MGO exposure (P＜0.01). The decrease of mitochondrion membrane potential and the excessive increase of mROS were induced after MGO exposure for 12 h, which were detected by JC-1 or MitoSOX probe. Conclusions MGO reduces cell viability and mitochondria membrane potential in hCMEC/D3 cells with excessive mROS generation. [ABSTRACT FROM AUTHOR]

To comprehensively understand the effect of selenium(Se)supplementation on Codonopsis pilosula, effects of sodium selenite levels on Se accumulation, growth, physiology and quality were explored by using hydroponic experiments. The results were as follows:(1)Treatment with 0.2 mg·L-1 Se promoted leaf size, plant height and biomass of C. pilosula, while treatment with 10 mg·L-1 Se suppressed them.(2)Both increasing Se level and exposure time to C. pilosula seedlings could raise its Se contents in root and leaf, and Se was distributed in organs with an order of root>leaf>stem.(3)Treatment with 0.2 mg·L-1 Se increased photosynthetic pigment content and root activity, and reduced malondialdehyde, proline and hydrogen peroxide contents, while treatment with 10 mg·L-1 Se had opposite effects.(4)Treatment with 0.2 mg·L-1 Se had positive effects on accumulations of lobetyolin, polysaccharide, and soluble protein, while treatment with 10 mg·L-1 Se had negative effects on the accumulations of polysaccharide and soluble protein. In summary, sodium selenite has double effect on C. pilosula; application of appropriate Se is beneficial to its growth, plant physiology and quality, and 0.2 mg·L-1 Se level is the optimum. This study may improve us to understand the effect of selenite level on the biology effect of C. pilosula, which will be useful for the basic research and cultivation of Se-enriched C. pilosula. [ABSTRACT FROM AUTHOR]

The restoration and reconstruction of mangrove wetland ecosystem is one of the key research fields in ecological restoration in the coastal zone of South China. In order to reveal the physiological and ecological strategies to light conditions of mangrove species, the characteristics of leaf soluble protein contents and activities of antioxidant enzymes in seedlings of eight mangrove species(Sonneratia apetala, Kandelia obovata, Bruguiera gymnorhiza, Aegiceras corniculatum, Acanthus ilicifolius, Acrostichum aureum, Heritiera littoralis and Hibiscus tiliaceus)under different light intensity treatments(100%, 45%, 30%, and 10% of natural light intensity)were studied using shading control experiment. The results were as follows:(1)Low light intensities had little effect on the leaf soluble protein contents of Bruguiera gymnorhiza, Acanthus ilicifolius and Acrostichum aureum, whereas the other five species showed a decreasing trend of leaf soluble protein contents with the decline in light intensity.(2)The activities of superoxide dismutase(SOD)and ascorbate peroxidase(APX)in the leaves of Bruguiera gymnorhiza, Acanthus ilicifolius and Acrostichum aureum under 10% of natural light intensity treatment had no significant differences compared with the control, while the other five mangrove species showed a decreasing trend of all the five antioxidant enzyme activities. In conclusion, the results indicate that Bruguiera gymnorhiza, Acanthus ilicifolius and Acrostichum aureum are suitable to be planted under the forest with high canopy density, while Sonneratia apetala, Kandelia obovata, Aegiceras corniculatum, Heritiera littoralis, Hibiscus tiliaceus are suitable to be planted under the forest with lower canopy density or planted as middle and upper layer tree species in mangrove. The results of this study provide theoretical guidance for the optimal allocation of artificial mangrove communities. [ABSTRACT FROM AUTHOR]

Background and purpose: Anti-programmed death-1 (anti-PD-1) adjuvant therapy and targeted therapy have resulted in longer recurrence-free survival (RFS) for malignant melanoma patients in clinical trials. However, the efficacy of adjuvant anti-PD-1 therapy in Chinese melanoma patients has not been previously reported. The purpose of this study was to retrospectively analyze the RFS in Chinese resected stage III malignant melanoma patients treated with adjuvant anti-PD-1 therapy and to preliminarily compare it with BRAFV600 inhibitor vemurafenib. Methods: This study retrospectively collected the information of 120 patients with resected stage Ⅲ malignant melanoma from three major cancer centers in China from August 30, 2018 to August 30, 2020. These patients received adjuvant pembrolizumab/toripalimab or vemurafenib. RFS rates were assessed by Kaplan-Meier curves and log-rank tests were used to examined differences. Results: Among the 90 patients with stage III malignant melanoma receiving adjuvant anti-PD-1 therapy, the median-RFS (mRFS) was 16 months (95% CI: 14-18 months); the 12-month RFS rate was 69.5% (95% CI: 64.6%-74.4%) and the 24-month RFS rate was 45.8% (95% CI: 40.5%-51.1%). The mRFS for 30 patients who received vemurafenib was 18 months (95% CI: 10-21 months), the 12-month RFS rate was 62.8% (95% CI: 54.0%-71.6%), and the 24-month RFS rate was 32.9% (95% CI: 27.1%-44.7%). In the stratified analysis, firstly, there was no difference in RFS between anti-PD-1 therapy group and vemurafenib group. Secondly, the BRAFV600E mutation status may did not affect the RFS of anti-PD-1 therapy. In addition, in this study, for the patients with BRAFV600E mutation, the RFS showed no difference between these patients received anti-PD-1 therapy or vemurafenib. Finally, although the RFS was better in patients with cutaneous melanoma than in patients with acral and worst in patients of unknown origin, the data for adjuvant therapy in China were still poor. Conclusion: These are the real-world data from adjuvant anti-PD-1 therapy in patients with resected stage III cutaneous and acral melanoma patients in China. In our study, adjuvant anti-PD-1 therapy is indistinguishable from vemurafenib indicates more combination therapies are needed to improve outcome in China. [ABSTRACT FROM AUTHOR]

Objective* To compare the ability of VDW Reciproc Blue (Blue), FKG XP-endo shaper (XP) and M3-L platinum (M3) instruments to maintain the original curvature of root canal (i. e. central positioning ability) in preparing curved root canals. Methods • Thirty resin-simulated curved single root canals were randomly divided into three groups. Root canal preparation was performed with a Blue file, an XP file or an M3 file randomly. Red or blue-black ink was injected into the root canal before and after preparation and photographs were taken under the stomatology surgical microscope. The images before and after preparation were overlapped. The apex of the prepared root was set as a circle center and the radius started at 1 mm. A concentric circle was made every 1 mm increased and sequentially incremented to 10 mm so that it intersected the image to form 10 measurement sites, and then the removal of ten measurement sites on the inside and outside of the root canal was recorded for statistical analysis. After the root canal was prepared the file was observed for tensile deformation under the stomatology surgical microscope. Results • There was significant difference in the absolute value of the difference between the internal and external removal of root canal between the M3 group and the Blue group, as well as the M3 group and the XP group (P=0.003 1, P=0.002 0); but there was no significant difference between the Blue group and the XP group (P=0.350). The file body of XP group was observed to have de-helix deformation under the stomatology surgical microscope, which did not return to its original shape when placed in hot water, and no deformation was observed in the file body of M3 group and Blue group. Conclusion • The three kinds of single-file nickel-titanium instruments have good formation ability when preparing the curved root canals. But XP file and Blue file can maintain the original curvature of root canals better than M3 file. XP files are prone to deformation when preparing resin root canal, therefore the use of XP should be appropriately reduced clinically. [ABSTRACT FROM AUTHOR]

Trastuzumab deruxtecan (DS-8201a) is a novel antibody-drug conjugate (ADC) of human epidermal growth factor receptor 2 (HER2) targeted antibody and DNA topoisomerase Ⅰ inhibitor (deruxtecan, DXd). DS-8201a has the characteristics of loading new cytotoxic drugs, high proportion of drug antibodies and high cell membrane permeability. Compared to traditional anti-HER2 drugs only aimed at patients with overexpression of HER2, DS-8201a can also play a role in tumors with high and low expressions of HER2. So far, phase Ⅰ to Ⅲ clinical trials have been carried out in a variety of solid tumors, such as breast cancer, gastric cancer, colorectal cancer and non-small cell lung cancer. Studies have shown results, including indications, toxicity and safety, determination of effective dose, comparison with existing first-line and posterior-line standard chemotherapy regimens, and efficacy comparison between monotherapy and combination therapy. It may provide a new therapeutic method for clinical treatment of tumors with overexpression or low expression of HER2, and pulmonary symptoms should be monitored during use. In this review, the drug structure characteristics, related clinical research progress and prospect of DS-8201a were summarized. [ABSTRACT FROM AUTHOR]

The dynamic study of community structure in karst area is a key problem to be solved in ecological reconstruction and rocky desertification control. Based on the monitoring data of six permanent monitoring sample plots in Puding County of Central Guizhou Province in 2013, 2015 and 2019, the dynamic characteristics of important value, species fluctuation structure, species diversity, diameter class structure and vertical structure of karst secondary forest in seven years were analyzed. The results were as follows:(1)The dominant degree and regeneration rate of Kalopanax septemlobus and Celtis sinensis increased, while the important values of Zanthoxylum armatum, Campylotropis macrocarpa and Pyracantha fortuneana decreased, and the mortality rate was higher.(2)There was no significant differences in species diversity indexes between different years. Species richness and Margalef richness index increased first and then decreased. Shannon-Wiener diversity index was basically stable, and uniformity index decreased first and then increased, the differences were significant between 2013 and 2019.(3)The distribution of diameter class and tree height showed “inverted J” and “left partial normal” distribution, and there was no significant differences in different years. The number of individuals of large diameter class(DBH≥10 cm)increased, but the number of tall trees(H≥9 m)decreased. In the shrub layer, the number of individuals of Pyracantha fortuneana, Campylotropis macrocarpa and Rhamnus rosthornii at 0≤H<3 m and 0≤DBH<2.5 cm, decreased, while the number of individual tree species such as Kalopanax septemlobus and Celtis sinensis increased. The natural succession process of karst secondary forest is slow and complex, and the hierarchical structure is not obvious. The community is in the middle and early stage of succession, and the community regeneration is good, which will further develop in the direction of arbor dominance [ABSTRACT FROM AUTHOR]

Background and purpose: Chemotherapy-induced nausea and vomiting (CINV) can cause severe damage to body functions and even lead to death. The prevention of CINV is critically important in patients receiving emetogenic chemotherapy regimen. This study aimed to investigate the prevalence and treatment of CINV in Grade-A tertiary hospitals in Shanghai and explore risk factors of CINV to improve its management. Methods: The clinical data of 376 cancer patients in Grade-A tertiary hospitals in Shanghai from October 2022 to December 2022 were collected retrospectively. The questionnaire was used to conduct a crosssectional study. The univariate and multivariable logistic regression models were used to evaluate the influencing factors of CINV. Results: The management and coincidence of the guideline in 2022 significantly improved compared to five years ago. For patients receiving high-emetic-risk chemotherapy regimen, the coincidence of the guideline increased from 21.6% to 67.0%. For patients receiving moderate-emetic-risk chemotherapy regimen, the neurokinin-1 (NK-1) receptor antagonist was not significantly associated with CINV. Multivariable analysis showed that the chemotherapy regimen was the only risk factor for CINV during the whole period (P＜0.05). Conclusion: The chemotherapy regimen is the main risk factor for CINV. To control CINV better, clinical practitioners should focus on the intrinsic risk of chemotherapy regimens preferentially, estimate the risk and adhere better to guidelines. [ABSTRACT FROM AUTHOR]

Objective. To analyze the risk factors for the death of patients with heterotaxy syndrome. Methods • The clinical data of 56 patients with clear diagnosis of heterotaxy syndrome were collected. Clinical characteristics and risk factors for death were analyzed. Results • 47 patients were right isomerism and 9 patients were left isomerism according to anatomical classification. Patients with right isomerism had more severe cardiovascular malformation than those with left isomerism. Of 56 patients, 6 (10.7%) with right isomerism died, in which 5 (83.3%) had moderate to severe atrioventricular valve regurgitation. Results of Mann-Whitney test and Chi-squared test showed that the differences in incidences of moderate to severe atrioventricular valve regurgitation and postoperative low blood oxygen saturation (≤ 80%) were statistically significant (P=0.033 6, P=0.041 7). Univariate Logistic regression analysis showed moderate to severe atrioventricular valve regurgitation was a risk factor for the death of patients with heterotaxy syndrome [OR (95% CI): 11.666 (1.254--108.557)，P=0.030 9]. Conclusion • Moderate to severe atrioventricular valve regurgitation is an important risk factor for the death of patients with heterotaxy syndrome. [ABSTRACT FROM AUTHOR]

Mangrove associates are a category of plants that can grow and reproduce on both intertidal coastal zones and land. As subtropical coastal zones are characterized by high sun light and temperature, how mangrove associates adapt to such an environment is an important issue. Some researches show that mangrove associates are similar to land plant as well as thalassophyte in certain morphological structures and biochemical characteristics. However, there are few studies focusing on plant physiological characteristics of mangrove associates, especially in leaf gas exchange characteristics. Hibiscus tiliaceus(Malvaceae)is a pantropical mangrove associate that usually occurs in coastal zones. It is widely used for the conservation of sea banks, architecture and medicine. In order to disentangle the photosynthetic physiological mechanims underlying its habitat adaptation to high light and temperature under south subtropical climate, leaf gas exchange characteristics of H. tiliaceus were measured using LI-6400 portable photosynthesis system(Li-Cor Inc, USA)at Mangrove Natural Reserve of Qi'ao Island of Zhuhai City, Guangdong Province during July and August of 2013. The nature reserve(22°23'40'' N, 113°36'40'' E)is characterized by a typical south subtropical monsoon climate. The diurnal changes in photosynthetic rate(Pn), stomatal conductance(Gs), intercellular CO2 concentration(Ci)and transpiration rate(E)in H. tiliaceus all exhibited a mono-peak modal, and the peak value of Pn occurring at noon was around 26.8 μmol CO2 · m-2 · s-1 without obvious photoinhibition during the daytime. The high photosynthetic rate in H. tiliaceus was associated with high stomatal conductance, which was probably related to anatomical features of leaves, such as high stomatal density and dense trichomes in the lower leaf epidermis. Analysis of light response curves revealed that its light saturation point was 800 μmol photons·m-2 ·s-1 and its light compensation point was 26 μmol photons·m-2 ·s-1. The net photosynthesis at saturating irradiances was high at 27.8 μmol CO2 · m-2 · s-1. These photosynthesis parameters, along with high daily mean photosynthetic rate(19.6 μmol CO2 · m-2 · s-1)in H. tiliaceus suggested that this mangrove associate was characterized as a typical sun plant species. The results showed that the fast growth of H. tiliaceus might be attributed to its high and stable photosynthetic capacity, thus providing basic data for further revealing the eco-physiological mechanism underlying habitat adaptation of H. tiliaceus and other mangrove associates to coastal environment with high temperature and high light in summer. These results can also provide theoretical supports for its planting and reforestation practices. [ABSTRACT FROM AUTHOR]

In order to investigate the effects of conservation tillage on the soil and sugarcane growth in sugarcane field, the study set up two farming methods(conventional farming, smash ridging)and two fertilization levels(reduced fertilization by 20%, conventional fertilization), and covered leguminous straw near the roots between sugarcane rows after the sugarcane seedling stage, taking the second-year stubble cane as the object. The dyeing tracer method was used to determine the characteristics of preferential flow in the sugarcane field under straw mulching, and the study also determined and analyzed sugarcane plant height, stem circumference, underground root biomass, yield and quality and other important agronomic characteristics. The results were as follows:(1)The soil preferential flow in the sugarcane field under the smash ridging was fast and active. The addition of straw mulch reduced the degree of soil preferential flow, increased the lateral transport capacity of soil moisture in the 10-25 cm soil layer, and improved the soil water storage capacity to a certain extent.(2)Conservation tillage of smash ridging under straw mulching improved the root biomass and yield of sugarcane. The root biomass of no-tillage stubble cane under straw mulching increased by 8.97%-25.54%. Compared without straw mulching, the biomass of the underground root system during the elongation period of the straw mulching stubble cane increased by 4.2%-13.1% under the reduced fertilization treatment; In the weight loss treatment, the sugarcane yield increased by 16.27% under adding straw mulch and smash ridging coupling, and compared with conventional fertilization without straw mulching, the yield increased by 5.95% under adding straw mulching.(3)Smash ridging conservation tillage was beneficial to improve the quality of sugarcane. Compared with the treatment without straw mulching, the straw mulching under smash ridging tillage significantly improved the apparent purity of sugarcane juice, and the fiber, brix, pol and sucrose content were all improved. In summary, no-tillage straw mulching can be used as a protective production regulation method for sugarcane fields in smash ridging red soil slope farmland. [ABSTRACT FROM AUTHOR]

The corona virus disease 2019 (COVID-19) pandemic continues to severely impact healthcare systems around the world, and patients with cancer are even worse affected owing to compromised immune status and greater exposure risk. In the present review, we retrieved the relevant literature including guidelines and consensuses directly related to the purpose of this study from the PubMed database, and then summarized the research data on cancer and COVID-19, aiming to discuss the personal protection, systemic anti-cancer therapy, outcome of co-infection, and the clinical management strategy in this population. We found that patients with malignant tumors had a higher chance of suffering COVID-19, co-infection of whom had an even worse clinical prognosis, especially for those with lung cancer or hematologic cancers. Systemic chemotherapy may delay the clearance of severe acute respiratory syndrome corona virus 2 (SARS-CoV-2) virus of human body, and thus have a negative impact on the clinical outcomes of COVID-19, while certain endocrine therapy and targeted drugs having limited or no impact. There has been no sufficient evidence for the impact of immune checkpoint therapy on the outcomes of COVID-19 till now. It is of great value to strengthen the personal protection of patients, adjust the anti-tumor treatments rationally and optimize the clinical management processes. [ABSTRACT FROM AUTHOR]

Using hydroponie experiments with one-year-old cutting seedlings, we investigated the effects of sodium selenate (Se concentration of 0, 0. 15, 0.3, 1.5, 3, 5 and 8 mg L) on selenium accumulation, plant growth, physiological index, and microscopic structure of tea tree. The results were as follows: The selenium contents in the roots and shoot of tea seedlings were positively correlated with the selenium level in the nutrient solution; With the increase of selenium level, the plant growth indexes including the fresh weight of tea seedling, the number of lateral roots, the root biomass, the contents of photosynthetic pigments, and root activity tended to increase initially and then decrease, and the tea quality indexes such as tea polyphenols, soluble protein and soluble sugar contents also presented the similar trend; However, the contents of malondialdehyde, hydrogen peroxide, and proline decreased in treatments of low selenium levels, and then increased in treatments of high selenium levels. Anatomical analysis of the root tips revealed different effects on the microscopic structure of roots under low and high selenium concentration. The cortex parenchyma cells of root treated with the low Se concentration (0.15, 0.3 and 1.5 mg L') were intact and well-shaped, and the root epidermal cells were smaller; Treatments at high selenium level (Se >3 mg • L') demonstrated larger root epidermal cells and damaged parenchyma cells with irregular shape, which showed stress responses. All together, the findings revealed that Se (IV) induced dual effects on tea seedlings. Se-supplementation with appropriate level (0.3 mg. L') showed beneficial effects on plant growth and tea quality by improving root activity and photosynthetic efficiency, minimizing the accumulation of peroxide and proline, and increasing both of the biomass and tea polyphenols contents. While excessive-Se (especially at 8 mg• L' Se) showed opposite effects on the parameters mentioned above and led to the reduction of plant growth and tea quality. These data might be helpful to explore the mechanism of dual effects of selenate on the growth of tea tree and provide reference for cultivation of Se-enriched tea. [ABSTRACT FROM AUTHOR]

Objective • To evaluate the reliability and validity of the Adolescents, Quality of Life Scale in left-behind children to provide a reliable measurement tool for the study of the quality of life of left-behlnd children. Methods • Six schools (three primary schools and three secondary schools) were selected in the Qianjiang District of Chongqing City by the purpose sampling method. A total of 1 276 students in flue 4-9 grades were selected. One week later，one of the primary and secondary schools was retested respectively. Results • The 23rd item was deleted from the Adolescents' Quality of Life Scale. Every factor load of 38 items was greater than 0.4, and the cumulative variance contribution rate was 61.713%. A total of 4 dimensions and 11 factors were obtained- Confirmatory factor analysis showed that, for physical, psychological，social，and pubertal dimensions and total scale，/Vdf values were less than 5, and goodness of fit index (GFI), incremental fit index (IFI) and comparative fit index (CFI) values were greater than 0.9; root mean square error of approximation (RMSEA) value of each dimension was less than 0.08, and RMSEA value of total scale was 0.083; normed fit index (NFI) values of physical and pubertal dimensions were greater than 0.9, and NFI values for the psychological and social dimensions and total scale were 0.883, 0.876, and 0.871, respectively. The coefficient and the test-retest reliability of each dimension and the total scale were 0.648--0,849 and 0.554-0,831，respectively. Condnslon · The revised Adolescent Children's Quality of Life Scale has good reliability and validity, suggesting that it can be used for assessing the quality of life of left-behind children in China. [ABSTRACT FROM AUTHOR]

Objective. To evaluate the reliability and validity of the Adolescents Quality of Life Scale in left-behind children to provide a reliable measurement tool for the study of the quality of life of left-behind children. Methods. Six schools (three primary schools and three secondary schools) were selected in the Qianjiang District of Chongqing Citythe purpose sampling method. A total of 1 276 students in the 4-9 grades were selected. One week later, one of the primary and secondary schools was retested respectively. Results. The 23rd item was deleted the Adolescents Quality of Life Scale. Every factor load of 38 items was greater than 0.4, and the cumulative variance contribution rate was 61.713%. A total of 4 dimensions and 11 factors were obtained. Confirmatory factor analysis showed that, for physical, psychological, social, and pubertal dimensions and total scale, χ2/df values were less than 5, and goodness of fit index (GFI), incremental fit index (IFI) and comparative fit index (CFI) values were greater than 0.9; root mean square error of approximation (RMSEA) value of each dimension was less than 0.08, and RMSEA value of total scale was 0.083; normed fit index (NFI) values of physical and pubertal dimensions were greater than 0.9, and NFI values for the psychological and social dimensions and total scale were 0.883, 0.876, and 0.871, respectively. The coefficient and the test-retest reliability of each dimension and the total scale were 0.648-0.849 and 0.554-0.831, respectively. Conclusion. The revised Adolescent Childrens Quality of Life Scale has good reliability and validity, suggesting that it can be used for assessing the quality of life of left-behind children in China. [ABSTRACT FROM AUTHOR]

In order to study the effect of air staged combustion on the properties of fly ash,the air volume ratio of highdesulfurization active fly ash was obtained. In this paper,the dropper tube furnace was used. Combined with SEM,particle size analysis,XRD,XPS,plasma and chemical titration test equipment and methods,the properties and activities of fly ash obtained from pulverized coal combustion with different secondary air volumes and different proportions of sulfur-fixing agent were investigated. The results show that the effect of air staged combustion on physical morphology of fly ash is not significant,but the chemical composition,sulfur fixation rate and the content of activited calcium oxide change significantly. With the increase of secondary air volume,the content of Ca(OH)2 increased after decreased first,but CaO presents adversely,SO2 concentration first increased and then decreased,the content of activited calcium oxide reduced first increases,the burning rate and ratio of active calcium oxide content in fly ash hit the highest when the secondary air volume is about 95%,which is respectively about 45% and 17%;the breakthrough time and the cumulative desulfurization rate all showed a downward trend and then a rising trend with the increase of the secondary air volume,when the secondary air volume is 95%,fly ash desulfurization performance is best. [ABSTRACT FROM AUTHOR]

Banana is a tropical herb, and it is in great demand for water. Micro-sprinkler irrigation is an important water-saving irrigation method, which is widely used in modern banana production. Green manure is the essence of traditional agriculture. Banana intercropping green manure is conducive to the utilization of light and heat space resources and soil improvement. In this study, we intercropped bananas with grain and green beans, used micro sprinkler irrigation(MSI)mode, and set four different irrigation quotas: MSI2(900 m3·hm-2), MSI3(1 350 m3·hm-2), MSI4(1 800 m3·hm-2), MSI5(2 250 m3·hm-2), with no irrigation and clean cultivation as control, to learn the effects of water and nitrogen and yield under micro-sprinkler irrigation. The results showed that during the growth of mung bean, the banana evaporation of different irrigation treatments decreased in different degrees, while the evaporation of the clean cultivation mode(MSI0)was found a trend of rising. With the increase of irrigation amount, the banana evaporation in banana and green manure intercropping systems gradually increased, resulting in reduced water use efficiency. The cumulative soil evaporation of MSI5 was 385.6mm, which was 12.2%, 7.6%, 4.9% higher than that of MSI2, MSI3 and MSI4 respectively. Micro-sprinkler irrigation can improve the surface soil moisture content, which the soil moisture content of MSI2, MSI3, MSI4, MSI5 under 0-30 cm soil layer was significantly higher than those of MSI0 and MSI1, while below 30 cm, soil moisture began to decrease. Micro-sprinkler irrigation under banana-mung bean intercropping could ameliorate the structure of tillage, and enhance soil fertility. Three-phase ratio(2:1:1)of 900 m3·hm-2(MSI2)was the ideal pattern, the topsoil available nitrogen content of 1 350 m3·hm-2(MSI3)was the highest, the highest yield of MSI4 reached 48 218 kg·hm-2, and the optimal sugar content of MSI3 was up to 25.67%. From the above, it can be seen that appropriate irrigation is conducive to the improvement of banana soil habitat and increasing yield under banana-mung bean intercropping. [ABSTRACT FROM AUTHOR]

In this study, the self-developed silkworm excrement deodorant special preservative was used and the silkworm excrement was treated by field composting in order to realize safely silkworm excrement quick safety decomposing and utilization of cleaner fertilizer in paddy field and ecological nutrient of rice growth. The treated silkworm excrement organic fertilizer was applied as rice base fertilizer and tillering fertilizer for the study on rice habitat and security growth under excrement fast-rotting. The results showed that the temperature of the compost after the silkworm excremen transformation promoter was increased rapidly, and could convert stinky organics degradation or conversion into antioxidants. The heater temperature showed that the temperature of 5 d during the treating 10 d could maintain above 60 ℃. Rapid decomposition process, could effectively inhibit the growth of harmful microorganisms and kill pathogenic microorganisms silkworm excrement. After the quick-rot, we conducted a safety test, the Escherichia coli showed a descending trend. The odor eliminated after 4-5 d silkworm excrement fast rot. After application of this fertilizer to paddy fields, leaf chlorophyll content was 30.9% higher at the tillering stage, nitrate reductase activity increased by 48.9%, root activity increased by 21.3%, dry matter increased by 26.5%. Paddy yield increased 10.8%-22.9% and paddy soil permeability increased. Silkworm excrement fast-rotting to promote security growth and health utilization of rice growth is a safe, ecological, and healthy method, and the application effect is good. [ABSTRACT FROM AUTHOR]

Field experiments were conducted to investigate carbon and nitrogen accumulation & translocation and grain growth after flowering with two indica rice Baguixiang and Guihuazhan as material in 2008 and 2009. The main results are as follows. (1)There were some differences in post-anthesis dry matter remobilization among leaves blade, sheath and internode of the quality rice in different positions. The contribution of the second leaf sheath from top(SS)to the grain was greater than the first leaf sheath from top(FS)and the third leaf sheath from top(TS)and the contribution of the third internode from top(TI)to the grain was more than the first internode from top(FI)and the second internode from top(SI);(2)Differences of the grain in various parts were presented in grain filling rate and initial grain filling potential. Filling rate and grain weight at the inflexion point claimed as: UPG(upper position grains)>MPG(middle position grains)>BPG(basal position grains). Upper position grain showed earlier initial filling potential, higher filling time rate while lower position grain lower filling rate, lagging filling time, and grain weight showed UPG>MPG>BPG;(3)Dry matter translocation rate and efficiency of leaf blade and sheath and internode post-anthesis were proportional to grain were correlated with initial grain filling potential. The corrational between organs and grain initial were displayed as follows:internode>leaf sheath>leaf, and the correlation coefficients in different parts showed inverted 2 from top>3 from top>1 from top. The effect of dry matter remobilization of internode on grain growth was much more than leaf sheath, and least of leaves. The first internode from top and lower position grain growth occurred with synchronicity. The same case happened to the second internode from top and the middle position grain, the third internode from top and basal position grain. [ABSTRACT FROM AUTHOR]