检索结果-南通市图书馆

Acta Oceanologica Sinica 2018年第12期37卷 92-96页

作者： RIANTA Pratiwi ERNAWATI Widyastuti chen Guangcheng chen shunyang Research Center for Oceanography Indonesian Institute of Sciences Third Institute of Oceanography Ministry of Natural Resources

Mangrove ecosystems are sites with high biodiversity of benthic fauna, and fiddler crabs(genus Uca) are common benthic fauna in mangroves. The North Sulawesi in Indonesia has a good condition of mangrove while the information of the fiddler crabs is still limited. Manual samplings were conducted in wet, dry and transient seasons at a mangrove in Kema, North Sulawesi to investigate the species composition, density and distribution pattern of fiddler crabs. A total of 168 individuals, subjected to eight species of genus Uca crabs were collected at the mangrove, with U. triangularis having the highest abundance and U. annulipes having the lowest *** densities of fiddle crabs were 27.56 ind./m2, 32.89 ind./m2and 14.22 ind./m2at the seaward, middle and landward zones, respectively, and the density was higher in dry and wet seasons than in transient season.

关键词： Crustacea genus Uca species mangrove North Sulawesi Indonesia

Ecosystem carbon stock of a tropical mangrove forest in North Sulawesi, Indonesia

在线全文

学校读者我要写书评

暂无评论

Acta Oceanologica Sinica 2018年第12期37卷 85-91页

作者： chen shunyang chen Bin SASTROSUWONDO Pramudji DHARMAWAN I Wayan Eka OU Danyun YIN Xijie YU Weiwei chen Guangcheng Third Institute of Oceanography Ministry of Natural Resources Research Center for Oceanography Indonesian Institute of Sciences Technical Implementing Unit Marine Life Conservation Biak Indonesian Institute of Sciences

Recent studies have highlighted the valuable role played by mangrove forests in carbon sequestration and *** Indonesia accounts for a large proportion of global mangrove area, knowledge on the carbon stock and sources in the Indonesian mangrove is still limited. In this study, we quantified the ecosystem organic carbon(OC) stock and its spatial variation at an oceanic mangrove in Wori, North Sulawesi, Indonesia. The sources of soil OC were also investigated. The results showed that the mangrove soil had a substantial OC stock containing15.4 kg/m2(calculated by carbon) in the top 50 cm soil, and represented the majority of the ecosystem OC stock at the Wori mangrove. The mangrove biomass and ecosystem OC stock were 8.3 kg/m2and 23.7 kg/m2, *** was no significantly difference in the soil OC stock among the stations with difference distances offshore,while the highest mangrove biomass OC stock was found at the seaward station. Isotope mixing calculations showed that the rich OC in mangrove soils was attributed to the accumulated autochthonous mangrove source while the suspended organic matter in tidal water and the mangrove-adjacent seagrass contributed less than 20%to the soil OC. The results further demonstrated the importances of the oceanic mangrove in carbon storage and the mangrove plants in contributing OC to their soils.

关键词： mangrove carbon stock biomass soil stable isotopes Indonesia

Carbon Sources of Sediment and Epifaunal Food Sources in a Tropical Mangrove Forest in North Sulawesi, Indonesia

在线全文

学校读者我要写书评

暂无评论

Journal of Ocean University of China 2020年第5期19卷 1169-1176页

作者： WU Zhiqiang XIE Limei chen Bin DHAMAWAN I Wayan Eka SASTROSUWONDO Pramudji chen shunyang RIANTA Pratiwi ERNAWATI Widyastuti chen Guangcheng College of Marine Life Sciences Ocean University of ChinaQingdao 266000China Third Institute of Oceanography Ministry of Natural ResourcesXiamen 361005China Research Center for Oceanography Indonesian Institute of SciencesJakarta 11048Indonesia Observation and Research Station of Coastal Wetland Ecosystem in Beibu Bay Ministry of Natural ResourcesBeihai 536015China

The stable isotope ratios of nitrogen(δ^(15)N) and carbon(δ^(13)C) were applied in this study to analyze sediment carbon sources and primary food sources of epifauna in an oceanic mangrove forest in tropical North Sulawesi, Indonesia. Proportional contribution of mangrove-derived carbon to the food sources was compared among epifauna belonging to different feeding guilds. The sediment in the mangrove site with a depleted δ^(13)C signature(-28.02‰± 0.24‰) mainly consists of mangrove-derived carbon. Analysis using Bayesian stable isotope mixing model in the R program shows that mangrove-derived carbon can dominate the food sources of a majority of the epifauna(11 out of the total 18 species), especially 2 sesarmid crabs Parasesarma semperi and Sesarma sp., crab Epixanthus dentatus, and snails Terebralia sulcata and Optediceros breviculum, which belong to various feeding guilds. Mangrove-derived carbon has a proportional contribution to the food sources of fiddle crab Tubuca coarctata and 3 littorinid snails(Littoraria spp.) close to that of suspended particulate organic matter. Three planktophagous bivalve species(Anadara antiquata, Anadara sp. and Callista erycina) were found to mainly feed on seagrass-derived materials. Mean proportional contributions of mangrove-derived carbon to the food sources were 50.15%, 59.60%, 46.20% and 27.58% for the carnivorous, omnivorous, phytophagous and planktophagous groups, respectively. The results suggest that mangrove-derived carbon can directly(via grazing plant tissues) or indirectly(via deposit feedings) make an important contribution to the food sources of epifauna in the oceanic mangrove forest where the allochthonous input of organic carbon is low.

关键词： epifauna stable isotope carbon nitrogen sediment feeding guilds

Acidic/hypoxia dual-alleviated nanoregulators for enhanced treatment of tumor chemo-immunotherapy

在线全文

学校读者我要写书评

暂无评论

Asian Journal of Pharmaceutical Sciences 2024年第2期19卷 136-152页

作者： Xiaoju Guo Xiaoxiao chen Jiayi Ding Feng Zhang shunyang chen Xin Hu Shiji Fang Lin Shen chenying Lu Zhongwei Zhao Jianfei Tu Gaofeng Shu Minjiang chen Jiansong Ji Lishui Central Hospital Shaoxing UniversityShaoxing 312000China Zhejiang Key Laboratory of Imaging and Interventional Medicine Imaging Diagnosis and Interventional Minimally Invasive InstituteThe Fifth Affiliated Hospital of Wenzhou Medical UniversityLishui 323000China Clinical College of The Affiliated Central Hospital School of MedicineLishui UniversityLishui 323000China Key Laboratory of Precision Medicine of Lishui Lishui 323000China

Chemotherapy plays a crucial role in triple-negative breast cancer (TNBC) treatment as it not only directly kills cancer cells but also induces immunogenic cell death. However, the chemotherapeutic efficacy was strongly restricted by the acidic and hypoxic tumor environment. Herein, we have successfully formulated PLGA-based nanoparticles concurrently loaded with doxorubicin (DOX), hemoglobin (Hb) and CaCO3 by a CaCO3-assisted emulsion method, aiming at the effective treatment of TNBC. We found that the obtained nanomedicine (DHCaNPs) exhibited effective drug encapsulation and pH-responsive drug release behavior. Moreover, DHCaNPs demonstrated robust capabilities in neutralizing protons and oxygen transport. Consequently, DHCaNPs could not only serve as oxygen nanoshuttles to attenuate tumor hypoxia but also neutralize the acidic tumor microenvironment (TME) by depleting lactic acid, thereby effectively overcoming the resistance to chemotherapy. Furthermore, DHCaNPs demonstrated a notable ability to enhance antitumor immune responses by increasing the frequency of tumor-infiltrating effector lymphocytes and reducing the frequency of various immune-suppressive cells, therefore exhibiting a superior efficacy in suppressing tumor growth and metastasis when combined with anti-PD-L1 (αPD-L1) immunotherapy. In summary, this study highlights that DHCaNPs could effectively attenuate the acidic and hypoxic TME, offering a promising strategy to figure out an enhanced chemo-immunotherapy to benefit TNBC patients.

关键词： CaCO3-based nanoparticles Hypoxia attenuation Acidity neutralization Reversal of chemotherapy resistance Enhanced chemo-immunotherapy

在线全文

学校读者我要写书评

暂无评论

基于信号重构的并行ADC定时误差校准

数据采集与处理 2006年第2期21卷 149-153页

作者：陈顺阳张东坡杨小牛中国电子科技集团第36研究所嘉兴314001

多通道时间交叠式AD会引入定时误差,而这种定时误差会导致镜频杂散。本文基于非均匀采样信号的重构理论,提出了一种利用内插滤波器组对定时误差进行消除的方法。其设计思想是将时间交叠式AD问题转化为周期性重复的非均匀采样,并结合两... 详细信息

多通道时间交叠式AD会引入定时误差,而这种定时误差会导致镜频杂散。本文基于非均匀采样信号的重构理论,提出了一种利用内插滤波器组对定时误差进行消除的方法。其设计思想是将时间交叠式AD问题转化为周期性重复的非均匀采样,并结合两通道并行ADC,给出了详细的内插滤波器设计方法。仿真实验结果表明,本文提出的算法对校准定时误差非常有效,并行AD输出的镜频信号得到很好的抑制。

关键词：交叠式采样采样定时误差校准信号重构

在线全文

学校读者我要写书评

暂无评论

红树林湿地相手蟹科动物摄食生态研究进展

生态学报 2014年第19期34卷 5349-5359页

作者：陈顺洋陈光程陈彬叶勇马志远国家海洋局第三海洋研究所厦门361005 宾海湿地生态系统教育部重点实验室厦门大学环境与生态学院厦门361102

相手蟹科物种是红树林湿地的主要底栖动物类群,在生态系统中起着重要的作用。我国大陆地区目前已记录的相手蟹科物种数量为12种,低于其它红树林地区(国内常用的采样方法会造成螃蟹物种数量和密度的低估),其中褶痕相手蟹(Sesarma plicata... 详细信息

相手蟹科物种是红树林湿地的主要底栖动物类群,在生态系统中起着重要的作用。我国大陆地区目前已记录的相手蟹科物种数量为12种,低于其它红树林地区(国内常用的采样方法会造成螃蟹物种数量和密度的低估),其中褶痕相手蟹(Sesarma plicata)、无齿相手蟹(***)和双齿相手蟹(***)等是常见种。红树植物叶片是相手蟹科动物的主要食物来源,相手蟹科动物通过地表摄食和洞穴贮存的形为消耗了大量的红树植物凋落叶,使这些凋落叶的有机质和营养元素得以保留在生态系统内,在凋落叶的周转和物质归还方面起到重要的作用。它们同时也摄食红树植物的繁殖体并且对不同物种的繁殖体具有摄食偏好,这可能对一些红树物种的植被更新能力和红树植被群落结构产生影响。相手蟹科动物对不同物种和不同状态的红树叶片也存在摄食偏好,通常对腐烂的叶片摄食偏好较强;螃蟹的摄食偏好与叶片的营养成份、粗纤维和单宁含量以及C/N比等性质有关;但在恶劣的野外环境下,螃蟹则会表现出随机性摄食。目前关于相手蟹科动物生态学作用的认识仍不充分,例如它们的种群大小和对凋落物的转化作用等,有待于进一步研究。

关键词：红树林相手蟹科螃蟹摄食生态凋落叶

在线全文

学校读者我要写书评

暂无评论

JTIDS信号的高效信道化接收及检测方法

计算机工程与应用 2014年第6期50卷 83-87页

作者：赵跃陈顺阳杨小牛杭州电子科技大学通信工程学院杭州310018 中国电子科技集团公司第三十六研究所浙江嘉兴314033

根据联合战术信息分发系统(Joint Tactical Information Distribution System,JTIDS)信号的特点,提出一种基于多相滤波的JTIDS信号接收方法。该接收模型具有全概率接收JTIDS信号的特点,而且所需计算复杂度低。在信号接收后,通过能量检... 详细信息

根据联合战术信息分发系统(Joint Tactical Information Distribution System,JTIDS)信号的特点,提出一种基于多相滤波的JTIDS信号接收方法。该接收模型具有全概率接收JTIDS信号的特点,而且所需计算复杂度低。在信号接收后,通过能量检测对输出信号进行脉冲宽度检测,判断信号是否为JTIDS信号。仿真结果表明该方法在信噪比为正时具有较好的性能。

关键词：联合战术信息分发系统(JTIDS) 多相滤波器能量检测信道化接收机

在线全文

学校读者我要写书评

暂无评论

海南常见红树植物叶片脂肪酸组成

应用海洋学学报 2023年第3期42卷 434-441页

作者：杨睿尧谢丽梅安文硕陈顺洋陈彬陈光程上海海洋大学海洋科学学院上海201306 自然资源部第三海洋研究所福建厦门361005 厦门大学环境与生态学院福建厦门361005 自然资源部北部湾滨海湿地生态系统野外科学观测研究站广西北海536015

脂肪酸的组成分析对认识红树植物脂肪酸资源、红树林生态系统内部的营养关系、食物网的结构,以及红树植物对生境的适应等具有重要参考价值。本研究分析了海南岛铁炉港和清澜港两个港湾的红海榄(Rhizophora stylosa)、杯萼海桑(Sonnerati... 详细信息

脂肪酸的组成分析对认识红树植物脂肪酸资源、红树林生态系统内部的营养关系、食物网的结构,以及红树植物对生境的适应等具有重要参考价值。本研究分析了海南岛铁炉港和清澜港两个港湾的红海榄(Rhizophora stylosa)、杯萼海桑(Sonneratia alba)、木果楝(Xylocarpus granatum)、角果木(Ceriops tagal)、榄李(Lumnitzera racemosa)、木榄(Bruguiera gymnorrhiza)和正红树(Rhizophora apiculata)等7种不同红树植物叶片中脂肪酸的组成及含量。在样品中共检测出25种脂肪酸,其中月桂酸、棕榈酸和肉豆蔻酸等8种存在于所有样品中。样品中含量最高的饱和脂肪酸均为棕榈酸(占比44.32%),其次为硬脂酸(占比7.74%),不饱和脂肪酸含量较高的有油酸(占比7.61%)、亚油酸(占比9.81%)和二十碳烯酸(占比12.16%)。植物样品的脂肪酸不饱和指数为0.24~1.13。除木果楝和清澜港采集的木榄样品外,其余样品种的不饱和脂肪酸含量均低于饱和脂肪酸。铁炉港的红海榄、杯萼海桑、角果木和榄李4种植物叶片不饱和脂肪酸含量高于清澜港同一物种的,而木榄的不饱和脂肪酸含量则表现为清澜港高于铁炉港。脂肪酸组成上,木果楝和正红树在两个港湾的相似性高于其他红树植物,棕榈酸、二十碳烯酸和亚油酸是造成红树植物脂肪酸组成差异的主要组分。本研究的结果表明红树植物的脂肪酸组成与物种和区域有关,而热带地区红树植物可能具有不饱和脂肪酸含量低的特点。

关键词：海洋生物学红树叶片脂肪酸特征脂肪酸脂肪酸不饱和指数

在线全文

学校读者我要写书评

暂无评论

红树林恢复初期莱氏锥滨螺分布动态

生态学报 2023年第19期43卷 8099-8108页

作者：陈顺洋邢炳鹏薛志勇朱红晔陈彬俞炜炜安文硕陈光程自然资源部第三海洋研究所厦门361005 自然资源部海洋生态保护与修复重点实验室厦门361005 福建省海洋生态保护与修复重点实验室厦门361005 漳州市龙海区林业局浮宫林业工作站漳州363104 中国海洋大学海洋与大气学院青岛266100

树栖腹足类动物是红树林底栖动物的重要组成部分,其组成和分布受到红树植被的影响。因此,在红树林生态修复中,腹足类动物的恢复依赖于植被的发育。滨螺科(Littorinidae)锥滨螺属(Mainwaringia)动物是亚洲红树林的广布种,但针对其在红树... 详细信息

树栖腹足类动物是红树林底栖动物的重要组成部分,其组成和分布受到红树植被的影响。因此,在红树林生态修复中,腹足类动物的恢复依赖于植被的发育。滨螺科(Littorinidae)锥滨螺属(Mainwaringia)动物是亚洲红树林的广布种,但针对其在红树林中的分布及种群特征的研究较少,对红树林植被恢复过程中锥滨螺属动物的恢复动态更是鲜有研究。调查了厦门下潭尾湿地秋茄(Kandelia obovata)红树林恢复初期,新记录种莱氏锥滨螺(Mainwaringia leithii)种群恢复的时间动态,并分析其与植被参数的关系。研究发现,红树林恢复初期,秋茄植被生长迅速,株高、冠幅、基径和覆盖度分别由0.5年生幼林的41.3 cm、25.0 cm、1.04 cm和25%增长为8年生样地的179.2 cm、76.7 cm、5.96 cm和95%。在秋茄胚轴种植6个月左右开始记录到莱氏锥滨螺的个体,其密度和生物量在1.5 a后达到最大(分别为136个/m^(2)和1.86 g/m^(2)),而后逐渐降低,种植3 a后秋茄林内莱氏锥滨螺仅零星分布。除8年生的样地,莱氏锥滨螺的个体大小随恢复时间的变化特征与其密度相反,在1.5 a和2 a个体相对较小。结果表明,莱氏锥滨螺是下潭尾秋茄红树林常见的树栖软体动物,其种群快速响应红树林植被的恢复,这种恢复动态可能与植被发育过程中栖息环境的变化有关。

关键词：红树林恢复时间莱氏锥滨螺秋茄树栖

不同状态红树和盐沼植物样品的脂肪酸组成比较研究

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

应用海洋学学报 2021年第4期40卷 614-621页

作者：谢丽梅吴志强陈彬陈顺洋陈光程自然资源部第三海洋研究所福建厦门361005 中国海洋大学海洋生命学院山东青岛266003 福建省海洋生态保护与修复重点实验室福建厦门361005

本研究分析了九龙江口红树植物秋茄(Kandelia obovata)和桐花树(Aegiceras corniculatum),以及盐沼植物互花米草(Spartina alterniflora)和短叶茳芏(Cyperus malaccensis)不同状态(成熟、衰老和腐烂)叶片中脂肪酸组成及相对含量。结果... 详细信息

本研究分析了九龙江口红树植物秋茄(Kandelia obovata)和桐花树(Aegiceras corniculatum),以及盐沼植物互花米草(Spartina alterniflora)和短叶茳芏(Cyperus malaccensis)不同状态(成熟、衰老和腐烂)叶片中脂肪酸组成及相对含量。结果共检测出20种脂肪酸,其中9种存在于所有样品中。样品中含量最高的饱和脂肪酸均为棕榈酸C16:0(21.76%~39.55%),其次是硬脂酸C18:0(4.98%~29.88%);不饱和脂肪酸主要有油酸C18:1n9(2.04%~12.90%)、亚油酸C18:2n6(8.25%~24.69%)和C20:1n9(1.64%~40.45%)。红树植物和盐沼样品中的脂肪酸组成存在差异,C30:0为红树植物的特征脂肪酸。在植物衰老和腐烂的样品中的脂肪酸组成与新鲜成熟样品存在差异,C20:1n9在衰老的样品中出现明显的下降,而相比红树植物两种盐沼植物的C20:1n9含量则下降更快。研究结果表明,总体上湿地植物在衰老和腐烂后不饱和脂肪酸占脂肪酸的比例明显下降,而必需脂肪酸C18:2n6的水平则未出现升高。

关键词：海洋生物学红树盐沼植物脂肪酸衰老腐烂