卷丹百合珠芽发育形态特征及生理变化研究

运用石蜡切片技术观察卷丹百合珠芽发育形态学特征,通过测定珠芽发育过程相关生理指标变化,研究其发育机理。结果表明,珠芽发育可分为3个阶段,珠芽启动期、膨大期和成熟期。植物内源激素IAA、ZR、GA_3对珠芽发生与发育起促进作用,而ABA、JA有利于珠芽成熟。蔗糖、淀粉等物质积累及相关酶活性变化在卷丹百合珠芽形成发育过程有重要作用,为卷丹百合繁殖发育研究提供参考。

Ecological Footprint and Major Driving Forces in West Jilin Province, Northeast China

The environmental impact caused by local people (ecological footprint of consumption, EFc) and the actual environmental impact that the ecosystem burdens (ecological footprint of production, EFp) in West Jilin Province, Northeast China from 1986 to 2006 were evaluated by using ecological footprint (EF) method. And the major driving forces of EFc and EFp were analyzed by STIRPAT model. Both EFc and EFp showed increasing trends in 1986-2006, accompanied by decreasing ecological deficits but expanding ecological overshoots. Population (P), GDP per capita (A1), quadratic term of GDP per capita (A2), urbanization (Ta1), and quadratic term of urbanization (Ta2) were important influencing factors of EFc, among which Ta2 and Ta1 were the most dominate driving forces of EFc. A1, A2 and Ta2 were important influencing factors of EFp, among which A2 and A1 were the most dominate driving forces of EFp. In 1986-2006, the classical Environmental Kuznets Curve hypothesis did not exist between A2 and EF (both EFc and EFp), but did between Ta2 and EF. The results indicate that enhancing the urbanization process and diversifying economic sources is one of the most effective ways to reduce the environmental impact of West Jilin Province. Moreover, importance should be attached to improve the eco-efficiency of resource exploitation and consumption.

Effects of elevated CO_2 concentration and nitrogen supply on biomass and active carbon of freshwater marsh after two growing seasons in Sanjiang Plain, Northeast China

An experiments were carried out with treatments differing in nitrogen supply (0, 5 and 15 g N/m2) and CO2 levels (350 and 700 μmol/mol) using OTC (open top chamber) equipment to investigate the biomass of Calamagrostis angustifolia and soil active carbon contents after two years. The results showed that elevated CO2 concentration increased the biomass of C. angustifolia and the magnitude of response varied with each growth period. Elevated CO2 concentration has increased aboveground biomass by 16.7% and 17.6% during the jointing and heading periods and only 3.5% and 9.4% during dough and maturity periods. The increases in belowground biomass due to CO2 elevation was 26.5%, 34.0% and 28.7% during the heading, dough and maturity periods, respectively. The responses of biomass to enhanced CO2 concentrations are differed in N levels. Both the increase of aboveground biomass and belowground biomass were greater under high level of N supply (15 g N/m2). Elevated CO2 concentration also increased the allocation of biomass and carbon in root. Under elevated CO2 concentration, the average values of active carbon tended to increase. The increases of soil active soil contents followed the sequence of microbial biomass carbon (10.6%) > dissolved organic carbon (7.5%) > labile oxidable carbon (6.6%) > carbohydrate carbon (4.1%). Stepwise regressions indicated there were significant correlations between the soil active carbon contents and plant biomass. Particularly, microbial biomass carbon, labile oxidable carbon and carbohydrate carbon were found to be correlated with belowground biomass, while dissolved organic carbon has correlation with aboveground biomass. Therefore, increased biomass was regarded as the main driving force for the increase in soil active organic carbon under elevated CO2 concentration.

Sulfur cycle in the typical meadow Calamagrostis angustifolia wetland ecosystem in the Sanjiang Plain,Northeast China

在一个 atmosphere-plant-soil 系统以内的硫周期和它的分割为若干部分的分发在 Sanjiang 平凡东北中国在典型草地 Calamagrostis angustifolia 沼泽地用一个分隔空间模型被学习。结果在典型草地 C 显示出那。angustifolia 沼泽地生态系统，土壤是主要存储分隔空间和 98.4% 硫在被积累的硫的当前的绞链，当仅仅 1.6% 硫在植物分隔空间被积累时。在植物分系统，根和崽是硫的主要存储分隔空间，他们仍然是 83.5% 全部的植物硫。通过典型草地 C 的分隔空间的硫周转的计算。angustifolia 沼泽地生态系统证明未葬部件从根， 0.16 gS/m2 是到根和 0.83 gS/m2 的 translocated 到崽收起 0.99 gS/m2。根从土壤收进 1.05 gS/m2，回到土壤的随后的 translocation 说明了 1.31 gS/m2，当在崽和网有 1.84 gS/m2 时，到土壤的硫的转移是超过 0.44 gS/(m2 ·一) 。从典型草地 C 的 H2S 的排放。到空气的 angustifolia 沼泽地生态系统是 1.83 mgS/(m2 ·一) ，当羰基硫化物(公司) 被典型草地 C 吸收时。从以 1.76 mgS/ 的率的空气的 angustifolia 沼泽地生态系统(m2 ·一) 。由到生态系统的降雨的硫的输入在生长期期间是 4.85 mgS/m2。输入和输出之间的差别是 4.78 mgS/m2，它显示那硫在生态系统被积累，原因沼泽地以后可以酸化。

Relationship Between Economic Growth and Water Environmental Quality of Anshan City in Northeast China

Based on the decomposition model of environmental quality and univariate regression model,the relationships of industrial wastewater drainage with economic scale,economic structure,and technological level in Anshan,a mining city in Northeast China,were studied. The results showed that,due to scale effect,the drainage of three important industrial wastewater pollutants(COD,NH3-N and petroleum) increased 8505t,671t and 384t,respectively,and due to structure effect,those pollutants drainage increased 3996t,174t and 120t from 2001 to 2006. While due to technological effect,the drainage of COD,NH3-N and petroleum reduced 4452t,458t and 331t,and due to cross effect,those pollutants drainage reduced 7270t,575t and 476t simultaneously. Meantime,the relationships between household consumption structure and domestic sewage discharge were analyzed,and domestic sewage discharges in different income levels were also compared. The results showed that,the domestic sewage discharges would increase 376t with 1000 yuan(RMB) increased in the traffic and communication consumption,and they would be 344t,219t,428t,1873t,respectively,in housing consumption,food consumption,medical consumption,miscellaneous commodity consumption. The proportion of domestic sewage discharge increased for high income residents significantly,but reduced for lower income residents. The industrial wastewater pollutants drainage tends to be reduced by technical progress,while domestic sewage discharge will be a more important factor for urban water environment quality.

下肢血管微创介入在缺血型糖尿病足中的应用效果分析

目的探讨下肢血管微创介入在缺血型糖尿病足中的应用效果。方法选取2013年8月至2018年6月牡丹江心血管病医院糖尿病分院内分泌科收治的116例糖尿病足患者作为研究对象,并按照不同干预方法将其分为观察组(60例,92处创面)与对照组(56例,70处创面),观察组患者在常规综合治疗的基础上行下肢血管微创介入治疗,对照组患者在常规综合治疗的基础上行保守溶栓治疗,对比观察两组患者踝肱指数(ankle brachial index,ABI)、创面愈合率、临床疗效及截肢情况。结果治疗第7、28天,观察组患者ABI均显著高于对照组(t=9.909、8.575,P均=0.000);治疗第28天,观察组患者创面愈合率显著高于对照组(t=10.930,P=0.000),临床疗效显著优于对照组(Z=-3.550,P=0.000);治疗过程中,观察组患者截肢率明显低于对照组(χ~2=10.881,P=0.004)。结论下肢血管微创介入治疗能够有效改善糖尿病足患者下肢血液供应,降低截肢率或截肢平面,促进创面愈合,改善患者预后。

简易机械间断负压引流联合湿润烧伤膏序贯治疗糖尿病足窦道疗效分析

目的 探讨简易机械间断负压引流联合湿润烧伤膏序贯治疗糖尿病足窦道的临床效果。方法 选取2020年2月至2020年10月牡丹江心血管病医院糖尿病分院收治的59例伴有窦道的糖尿病足患者作为研究对象,按照随机数表法将其随机分为观察组(30例)与对照组(29例),观察组患者采用简易机械间断负压引流联合湿润烧伤膏序贯治疗,对照组患者采用藻酸盐敷料联合湿润烧伤膏序贯治疗,对比观察两组患者材料费、处置费、窦道长度以及临床疗效。结果 治疗第7、 28天,观察组患者材料费、处置费均明显低于对照组(治疗第7天:t=15.111、 23.209,P均<0.001;治疗第28天:t=15.219、 26.374,P均<0.001)。治疗第7天,观察组患者窦道长度与对照组无明显差异(t=0.703,P=0.484);治疗第28天,观察组患者窦道长度明显短于对照组(t=3.024,P=0.004)。治疗第7天,观察组患者中显效4例、有效15例、无效11例,明显优于对照组患者的显效1例、有效9例、无效19例(Z=-2.304,P=0.021);治疗第28天,观察组患者中痊愈8例、显效8例、有效7例、无效7例,明显优于对照组患者的痊愈3例、显效4例、有效8例、无效14例(Z=-2.398,P=0.016)。结论 简易机械间断负压引流联合湿润烧伤膏序贯治疗糖尿病足窦道,可有效促进创面愈合,临床疗效较好,且治疗费用较低,值得基层医疗机构推广应用。

血清Chemerin对2型糖尿病合并下肢动脉病变的影响

检测2型糖尿病(T2DM)有无下肢动脉病变的血清Chemerin水平,探讨Chemerin对T2DM合并下肢动脉病变的影响。选取在我院就诊的T2DM患者,随机分为下肢动脉病变组和无下肢动脉病变组,每组各30例。同时选取25例在我院体检者作为对照组,各组均空腹采集静脉血,测定血糖、血脂、肝功、空腹血清胰岛素等,测量身高、体重,计算体重指数(BMI),并计算出胰岛素抵抗指数(HOME-IR)用以评价各组胰岛素的敏感性(ISI)。另取一份血标本用于Chemerin测定,血清Chemerin应用酶联免疫法检测。结果表明:血清Chemerin与T2DM胰岛素抵抗关系密切,而胰岛素抵抗增加心脑血管病变的风险。T2DM合并下肢动脉病变组Chemerin水平高于T2DM无下肢动脉病变组,推断Chemerin是T2DM合并下肢动脉病变的重要影响因子,可为治疗T2DM合并下肢动脉病变提供新思路。