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吸血蠓类对人畜危害较大,不仅是多种疾病的传播媒介,而且刺叮吸血骚扰性很大。1988年我们在辽宁省丹东地区东沟和风城二县郊区进行了采集和生态习性的调查,现将结果报道如下。材料和方法器材由军事医学科学院微生物流行病研究所提供的诱蠓帐、捕虫网和吸虫器。调查方法 相似文献
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Luocheng Lv Zhaofu Liao Jiali Luo Hongyi Chen Hongyan Guo Jifeng Yang Ruijin Huang Qin Pu Hui Zhao Ziqiang Yuan Shanshan Feng Xufeng Qi Dongqing Cai 《Journal of cellular and molecular medicine》2020,24(4):2531-2541
Recent research has revealed that cardiac telocytes (CTs) play an important role in cardiac physiopathology and the regeneration of injured myocardium. Recently, we reported that the adult Xenopus tropicalis heart can regenerate perfectly in a nearly scar‐free manner after injury via apical resection. However, whether telocytes exist in the X tropicalis heart and are affected in the regeneration of injured X tropicalis myocardium is still unknown. The present ultrastructural and immunofluorescent double staining results clearly showed that CTs exist in the X tropicalis myocardium. CTs in the X tropicalis myocardium were mainly twined around the surface of cardiomyocyte trabeculae and linked via nanocontacts between the ends of the telopodes, forming a three‐dimensional network. CTs might play a role in the regeneration of injured myocardium. 相似文献
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Zhu Jing Zeng Zhaofu Xiong Mengqing Mo Huaheng Jin Meng Hu Ke 《Sleep and biological rhythms》2022,20(3):421-429
Sleep and Biological Rhythms - The relationship between plasma orexin A (OXA) levels and cognitive function in patients with obstructive sleep apnea (OSA) remains unclear. This study aimed to... 相似文献
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Xue Min Mengyun Cai Tong Shao Ziyang Xu Zhaofu Liao Dongliang Liu Mengyuan Zhou Weipeng Wu Yulan Zhou Miaohua Mo Shun Xu Xinguang Liu Xingdong Xiong 《Aging cell》2022,21(1)
Circular RNAs (circRNAs) have been established to be involved in numerous processes in the human genome, but their function in vascular aging remains largely unknown. In this study, we aimed to characterize and analyze the function of a circular intronic RNA, ciPVT1, in endothelial cell senescence. We observed significant downregulation of ciPVT1 in senescent endothelial cells. In proliferating endothelial cells, ciPVT1 knockdown induced a premature senescence‐like phenotype, inhibited proliferation, and led to an impairment in angiogenesis. An in vivo angiogenic plug assay revealed that ciPVT1 silencing significantly inhibited endothelial tube formation and decreased hemoglobin content. Conversely, overexpression of ciPVT1 in old endothelial cells delayed senescence, promoted proliferation, and increased angiogenic activity. Mechanistic studies revealed that ciPVT1 can sponge miR‐24‐3p to upregulate the expression of CDK4, resulting in enhanced Rb phosphorylation. Moreover, enforced expression of ciPVT1 reversed the senescence induction effect of miR‐24‐3p in endothelial cells. In summary, the present study reveals a pivotal role for ciPVT1 in regulating endothelial cell senescence and may have important implications in the search of strategies to counteract the development of age‐associated vascular pathologies. 相似文献
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采用生境套娃方法反映水禽——东方白鹳生境需求的层级系统基础上,利用GIS技术建立定量化分析模型,深入探讨了小三江平原生境丧失对东方白鹳生境空间分布的影响。结果显示:与初始状态1954年相比,东方白鹳繁殖生境丧失了81.9%,平均斑块面积缩小了88%;同时,生境面积的丧失是伴随生境破碎化过程发生的。1983之后生境破碎化明显加剧,到2005年生境连通度显著降低,生境处于高度破碎化状态。研究表明,生境丧失对东方白鹳繁殖生境的影响不仅取决于关键生境要素的变化,生境空间异质性改变更为重要。 相似文献
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Soluble microbial products (SMPs) are considered as the main organic components in wastewater treatment plant effluent from
biological wastewater treatment systems. To investigate and explore SMP metabolism pathway for further treatment and control,
two innovative mechanistically based activated sludge models were developed by extension of activated sludge model no.3 (ASM3).
One was the model by combining SMP formation and degradation (ASM3-SMP model) processes with ASM3, and the other by combining
both SMP and simultaneous substrate storage and growth (SSSG) mechanisms with ASM3 (SSSG-ASM3-SMP model). The detailed schematic
modification and process supplements were introduced for comprehensively understanding all the mechanisms involved in the
activated sludge process. The evaluations of these two models were demonstrated by a laboratory-scale sequencing batch reactor
(SBR) operated under aerated/non-aerated conditions. The simulated and measured results indicated that SMP comprised about
83% of total soluble chemical oxygen demand (SCOD) in which biomass-associated products (BAPs) were predominant compared with
utilization-associated products (UAPs). It also elucidated that there should be a minimum SMP value as the reactive time increases
continuously and this conclusion could be used to optimize effluent SCOD in activated sludge processes. The comparative results
among ASM3, ASM3-SMP and SSSG-ASM3-SMP models and the experimental measurements (SCOD, ammonia and nitrate nitrogen) showed
clearly the best agreement with SSSG-ASM3-SMP simulation values (R = 0.993), strongly suggesting that both SMP formation and degradation and SSSG mechanisms are necessary in biologically activated
sludge modeling for municipal wastewater treatment. 相似文献
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Reaction of the zwitterionic imidazolium salt [(CH2COOH)(CH2COO)im] with K2CO3 or BaO in the presence of 18-crown-6 affords the salts [(CH2COO)2im][K(18-crown-6)] and [(CH2COO)2im]2[Ba(18-crown-6)], respectively. Recrystallisation of these crown complexes from the ionic liquid 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)amide, [emim][Tf2N], at a water interface, results in the formation of new salts in which the original anion is replaced by Tf2N−. Single crystal X-ray diffraction has been performed on two of the salts. Notably, the potassium structure containing 18-crown-6 and Tf2N− forms a linear chain coordination polymer that can be regarded as metal organic frameworks (MOFs). Moreover, this study provides insights into the separation of group I and II metal ions using crown ethers in combination with ionic liquids. 相似文献
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Baoyin Zhao Zhaofu Liao Shang Chen Ziqiang Yuan Chen Yilin Kenneth K.H. Lee Xufeng Qi Xiaotao Shen Xin Zheng Thomas Quinn Dongqing Cai 《Journal of cellular and molecular medicine》2014,18(5):780-789
The midterm effects of cardiac telocytes (CTs) transplantation on myocardial infarction (MI) and the cellular mechanisms involved in the beneficial effects of CTs transplantation are not understood. In the present study, we have revealed that transplantation of CTs was able to significantly decrease the infarct size and improved cardiac function 14 weeks after MI. It has established that CT transplantation exerted a protective effect on the myocardium and this was maintained for at least 14 weeks. The cellular mechanism behind this beneficial effect on MI was partially attributed to increased cardiac angiogenesis, improved reconstruction of the CT network and decreased myocardial fibrosis. These combined effects decreased the infarct size, improved the reconstruction of the LV and enhanced myocardial function in MI. Our findings suggest that CTs could be considered as a potential cell source for therapeutic use to improve cardiac repair and function following MI, used either alone or in tandem with stem cells. 相似文献