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31.
Children in refugee camps, and particularly those with disabilities, face unique challenges in accessing education and are at high risk of being marginalised. Best practices suggest that main-streaming is the optimal strategy for serving students with disabilities. This study examines the extent to which mainstreaming in a refugee camp helps to promote children's prosocial behaviours, taking into account their emotional and behavioural problems. In Kakuma Refugee Camp, Kenya, researchers collected data from the parents of children currently enrolled in special needs education centres (n=65) and from those formerly enrolled at these facilities who transitioned to mainstream classrooms (n=81). Children in mainstream schools functioned better in terms of prosocial behaviours, but this relationship disappeared when factoring in children's emotional and behavioural difficulties. In the context of a refugee camp, mainstreaming alone is not likely to help children's psychosocial and educational functioning, which requires dedicated supports, appropriate facilities and infrastructure, and a dual focus on disability-specific and disability-inclusive initiatives.  相似文献   
32.
The increasing alienation of people from nature is profoundly concerning because people's interactions with nature affect well-being, affinity for nature, and support of biodiversity conservation. Efforts to restore or enhance people's interactions with nature are, therefore, important to ensure sustainable human and wildlife communities, but little is known about how this can be achieved. A key factor that shapes the way people interact with nature is their affinity for nature (often measured as nature relatedness [NR]). We explored how using cues to experience nature as a means to induce NR situationally can influence the quality of people's nature interactions on visits to green spaces and their positive affect after the visit. Cues to experience are cues that guide individuals on how to interact with nature. We surveyed 1023 visitors to a nature reserve to examine the relationships between trait (i.e., stable and long-lasting) and state (i.e., temporary, brief) NR, the quality of nature interactions, and positive affect. We also conducted a controlled experiment in which 303 participants spent 30 min outdoors on campus and reported the quality of their nature interactions and positive affect. Participants were randomly assigned to 1 of 9 cues-to-experience experimental groups (e.g., smell flowers, observe wildlife, turn off your phone) that differed in the psychological distance from nature that they prompted. Participants who received cues of close psychological distance from nature (e.g., smell and touch natural elements) interacted 3 to 4 times more with nature and reported 0.2 more positive affect than other participants. Our results demonstrate that providing cues to experience nature, which bring people closer to nature and potentially induce state NR, can enhance the quality of people's nature interactions and their positive affect. These results highlight the role of NR in high-quality nature interactions and suggest the use of cues to experience as a promising avenue for inducing state NR and promoting meaningful interactions with biodiversity, thus, reconciling conservation and well-being objectives.  相似文献   
33.
Cyclodextrins (CDs), a class of cyclic oligosaccharide molecules containing a variety of chiral centre, are capable of recognizing enantiomeric molecules through the formation of inclusion complexes. In this work, we selected three types of CDs, β-CD and its two derivatives, randomly methylated β-CD (RAMEB) and hydroxypropyl β-CD (HP-β-CD), to evaluate effects on toxicity of racemic fenoxaprop (rac-FA) and its R-enantiomer (R-FA) to freshwater alga Scenedesmus obliquus (S. obliquus) and their dissipation in S. obliquus suspension with and without CDs addition, respectively, in an attempt to get more detail about enantioselective behavior of fenoxaprop acid (FA) in the environment, using CDs as a remediation agent for FA and formulation additive for fenoxaprop-p-ethyl (FE). The significant difference between rac-FA and R-FA was not observed in their acute toxicity to S. obliquus and dissipation in S. obliquus suspension. RAMEB had no effect on either toxicity of FA to S. obliquus or dissipation of FA in S. obliquus suspension, and it also didn't change the extent of enantioselectivity in toxicity of FA to S. obliquus. But the addition of a certain amount of β -CD and HP-β -CD reduced the toxicity of FA to S. obliquus and increased dissipation of FA in S. obliquus suspension, as well as changed the enantioselectivity in toxicity of FA to S. obliquus. The results indicated β-CD and HP-β-CD could be used as a promising agent for remediation of aquatic contamination produced by FA, and RAMEB might be used as potential formulation additives for FE, the parent compound of FA, as RAMEB didn't decrease activity of R-FA and might be environmentally safer than the conventional additives.  相似文献   
34.
火山岩矿物斑晶中的熔融包裹体是矿物结晶时包裹了原始岩浆而成,未发生泄露和破坏的熔融包裹体可以有效地保存有关原始岩浆中各种物质的实际浓度,其成分代表着原始岩浆的成分,它能比较真实、直接地提供原始岩浆的信息,反映成岩成矿时的物理化学务件和岩浆演化情况,因此对熔融包裹体的研究是火山学研究中的一个重要方面。文章综述了近年来熔融包裹体研究的最新进展和应用,分析了对熔融包裹体的几种检测方法的优缺点,讨论了常见的"岩石学方法"的一些问题。  相似文献   
35.
较系统地介绍了有机包裹体研究在生油盆地分析,油气运移、聚集和演化,油气评价及远景预测等方面的天所应用成果,并附近年来有机包裹体研究的某些进展作了简要阐述。  相似文献   
36.
油气包裹体在成藏年代学研究中的应用实例分析   总被引:4,自引:0,他引:4  
本文介绍了烃类流体包裹体在油气成藏期次、成藏年代和成藏史研究方面的应用 ,讨论了该方法在成藏年代学研究中存在的一些问题。指出在运用流体包裹体均一温度进行成藏年代分析时 ,一般应采用共生盐水包裹体的均一温度。认为流体包裹体均一温度确定成藏年代的准确性 ,一方面取决于储层埋藏史和热史模型的可靠性 ,另一方面后期构造热事件也是可能的影响因素。后期热事件可能使包裹体最初形成时的均一温度发生再平衡 ,造成所测的均一温度高于成藏时实际的古地温 ,由此确定的成藏年代将比实际的成藏年代偏晚。  相似文献   
37.
This study investigated the electrokinetic (EK) behavior of multiple chlorobenzenes, including 1,2,3,4-tetrachlorobenzene (TeCB), 1,2,4,5-tetrachlorobenzene (i-TeCB), and 1,2,3-trichlorobenzene (TCB) in contaminated clayed soils. The effect of β-cyclodextrin (β-CD) on the EK removal of the chlorobenzenes was studied. The largest removal was obtained when Na2CO3/NaHCO3 buffer was used as anodic purging solution without β-CD. The removal efficiencies were related to the aqueous solubilities of chlorobenzenes. With the same cumulative electroosmotic flow, greater solubility led to higher removal efficiency. The addition of β-CD inhibited the EK removal efficiency of all chlorobenzenes. The inhibition increased with the increase of β-CD concentration. With the same β-CD concentration, the inhibition increased with the rise of electric potential. It was found that the inclusion compounds between β-CD and chlorobenzenzes were less soluble than chlorobenzenes. The formation of the less soluble inclusion compounds reduced the aqueous solubility of chlorobenzenes and led to the partial immobilization of the chlorobenzenes that desorbed from soil. It was feasible to use the EK technology to remove chlorobenzenes in contaminated soils using water as the anodic flushing solution. The addition of β-CD was not recommended for the EK removal of chlorobenzenes.  相似文献   
38.
通过对老柞山金多金属矿床地质背景、硫同位素、铅同位素、碳氧同位素以及包裹体和岩石化学的研究 ,得出产金矿带成矿热液为高温岩浆热液 ,并有地壳物质混入 ,该矿床形成于活动大陆边缘钙碱系列环境。  相似文献   
39.
经过长期驯化和分离得到一株能降解硝基苯的高效菌株,初步鉴定其为不动杆菌属菌株,在30C时,硝基苯对该菌株的最适宜浓度为400mg/L左右。主要研究了羟丙基-β-环糊精(HPCD)对该菌株降解硝基苯的影响。研究发现:当硝基苯的浓度不超过微生物的最适宜生长浓度(400mg/L)时,HPCD对其降解基本没有影响;当硝基苯的浓度高于微生物的最适宜生长浓度时,HPCD的包合作用降低了硝基苯的毒性,加快了硝基苯的降解;HPCD浓度保持一定时,随着硝基苯浓度的增加,促进效果越明显;硝基苯浓度保持不变时,HPCD的浓度越高,促进效果越明显。  相似文献   
40.
The planning step of an ecological risk assessment includes the largest role for public participation in the entire assessment, for it is here that the risk manager must ensure that the assessment will yield the information he needs to make a decision. This essay discusses some general characteristics of public participation in ecological risk assessments, including the ways in which different lifestyles may lead to the establishment of community specific management goals and hence of different endpoints; the type and nature of the input provided by the public to the risk assessment and the ways in which input from the public differs from input from the scientific community; and a discussion of definitions of stakeholders and participatory processes which emphasizes their contextual nature. The essay concludes with a review of some of the challenges facing a risk manager as he designs a participatory process. Six major areas are discussed, each incorporating suggestions that should reduce difficulties in implementation of such a process and increase the likelihood of acceptance of its outcome, and hence the overall quality of the risk assessment.  相似文献   
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