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ＥＤＩＴＯＲＩＡＬＣＯＭＭＩＴＴＥＥ￥／／ＡｄｖｉｓｅｒｓＣｈｅｎ￣ｎ（ＣｈｅｎＫ￣ｃｈｅｎｒｅＭ￥）ＴａＤＳｈｉｐｏｎ（Ｎ＃ｇ）ｆｂｉＡｎｂｏｎｓ（ｔ￥＃）ｗａｎｇ￣ｏ（ｗａｎｇＴｅ－ｃｉａＥ￥Ｂ）ＬｉｎＢｉｄｄｅｎ（ＬｉｎＰｉｎｇ－ｎａｍ＃＊Ｗ）...     

关于龙门山区二叠纪灰岩飞来峰成因与时代的讨论

关于龙门山区二叠纪灰岩飞来峰成因与时代的讨论ＤＩＳＣＵＳＳＩＯＮＳＯＮＯＲＩＧＩＮＡＮＤＴＩＭＥＯＦＰＥＲＭＩＡＮＬＩＭＥＳＴＯＮＥＫＬＩＰＰＥＩＮＬＯＮＧＭＥＮＭＯＵＮＴＡＩＮＡＲＥＡ四川龙门山地区二叠纪灰岩超覆在中晚侏罗世地层之上的事实，早在我国...     

水库中几种主要微量营养元素的分布与变动

实验研究了一个中型水库（黄同水库）中几种主要微量营养元素（Ｆｅ、Ｍｎ、Ｚｎ、Ｃｕ、Ｍｏ）的存在形态、分布及其季节变动。主要结果为：（１）水库中Ｆｅ、Ｍｎ、Ｚｎ和Ｃｕ的平均总浓度分别为３６４．３、１１２．１、９６．０１和３．２４μｇ／Ｌ;Ｍｏ的溶解态平均浓度为３．２６μｇ／Ｌ。Ｆｅ和Ｍｎ以颗粒态为其主要存在形式,而Ｚｎ和Ｃｕ则以溶解态为主。（２）该水库５种微量元素的水平分布呈均匀化特征,但其浓度具有较明显的季节性变化。其垂直分布互有差异,Ｆｅ、Ｍｎ、Ｚｎ随水层深度增加而递减,而Ｃｕ和Ｍｏ的垂直变化甚小。（３）微量元素存在形态与水化学因子存在一定相关性,ＰＦｅ、ＰＺｎ、ＰＣｕ与ＤＯ间具有良好负相关,而ＤＺｎ、ＤＣｕ、ＤＭｏ和ＰＺｎ、ＰＦｅ与叶绿素间均呈紧密正相关。     

空间因子分析与沉积地球化学旋回元素组合的确定

１９９５年５月,引用地矿部“七五”东北太平洋ＣＣＡ１２１柱状沉积物的８个元素地球化学分析数据,利用空间因子分析方法确定两种周期度（Ｄ１＝６５ｃｍ,Ｄ２＝１０５ｃｍ）内的沉积地球化学旋回元素组合,并据此探讨多金属结核成矿与物源环境的关系,研究表明,与小尺度周期（Ｄ１＝６５ｃｍ）对应的元素组合：Ｕｄ１（Ｍｎ,Ｃｏ,Ｃｕ,Ａｌ２Ｏ３,ＳｉＯ２和Ｕｄ２（Ｆｅ,Ｃａ,Ｃｏ,Ｃｕ）与大尺度周期对应的元素组合为     

螺旋藻多糖对CD3AK细胞增殖能力的影响

研究了螺旋藻多糖（ＰＳ）对ＣＤ３ＭｃＡｂ激活的杀伤细胞（ＣＤ３ＭｃＡｂ Ａｃｔｉｖａｔｅｄ Ｋｉｌｌｅｒ Ｃｅｌｌｓ,ＣＤ３ＡＫ Ｃｅｌｌｓ）增殖能力的影响。结果表明,当ＰＳ浓度为２．５μｇ·ｍｌ＾－１培养体系条件下,对ＣＤ３ＡＫ细胞具有明显的刺激细胞增殖作用（Ｐ〈０．０２）;对培养长达２３ｄ的ＣＤ３ＡＫ细胞杀伤肿瘤细胞（Ｋ５６２细胞）的活性仍维持在较高的水平（４６．５％￣５０％）。提示ＰＳ对辐射     

预还原的Mo-Ni-K/C 催化剂上合成醇的动力学研究(英文)

基于一种简化的反应网络,导出了描述预还原的ＭｏＮｉＫ／Ｃ 催化剂上合成醇的经验动力学模型。研究结果表明,醇的化学吸附是生成更高一级醇的速度控制步骤（ 如：甲醇的吸附是生成乙醇的速控步骤等） 。生成甲醇、乙醇、丙醇和丁醇的表观活化能分别为４５．００ 、８８ ．１７、４９．９３ 和５６ ．９２ｋＪ／ｍｏｌ,高温有利于高级醇（ 指Ｃ２ 或以上醇） ,特别是乙醇的生成。     

Distribution of biomass of zooplankton in the Kuroshio area of the East China Sea

ＤｉｓｔｒｉｂｕｔｉｏｎｏｆｂｉｏｍａｓｓｏｆｚｏｏｐｌａｎｋｔｏｎｉｎｔｈｅＫｕｒｏｓｈｉｏａｒｅａｏｆｔｈｅＥａｓｔＣｈｉｎａＳｅａ￥ＭｅｎｇＦａｎ;ＣｈｅｎＳｈｉｑｕｎａｎｄＷｕＢａｏｌｉｎｇ（ＦｉｒｓｔｉｎｓｔｉｔｕｔｅＯｆＯｃｅａｎｏｇｒａ...     

海水电解质pmv的补充测定及其加和性关系的验证

首次用新研制的高精密磁力浮沉子密度计测定ＮａＨＣＯ３，ＫＢｒ，ＫＮＯ３和Ｃａ（ＮＯ３）２在盐度为３０．０和３４．７温度为２９８、１０Ｋ时的偏摩尔体积（即ｐｍｖ）。重新测定了ＮａＣｌ，ＫＣｌ．Ｎａ２ＳＯ４和ＭｇＳＯ４在海水中的ｐｍｖ，并用实验精密验证了海水中主要电解质的ｐｍｖ的加和性关系。     

溶解有机碳浓度的深海梯度

从全球大洋的许多站位采集了深水样品。以Ｓａｒｇａｓｓｏ海的深层水为参考,测定了溶解有机碳（ＤＯＣ）浓度。冰岛海域的浓度最高（４８±０．３μＭＣ）,至北大西洋的４８°Ｎ和３２°Ｎ分别降至４１．５±０．４和４３．６±０．３μＭ。环极海流（６１°Ｓ）和罗期...     

海水中氨基酸对Cu（Ⅱ）在r—MnOOH上吸附的影响

实验测定了海水中氨基酸存在下Ｃｕ（Ⅱ）在ｒ－ＭｎＯＯＨ上吸附的等温线、Ｃｕ（Ⅱ）％－－ｐＨ曲线和Ｃｕ（Ⅱ）％－氨基酸深度曲线。结果表明，较低浓度氨基酸对Ｃｕ（Ⅱ）在ｒ－ＭｎＯＯＨ上吸附没有影响，而较高浓度氨基酸却起抑制作用，这主要是由于海水中Ｃｕ（Ⅱ）－氨基酸络合反应与ｒ－ＭｎＯＯＨ竞争Ｃｕ（Ⅱ）所致。此外，海水中较高浓度氨基酸只使Ｃｕ（Ⅱ）在ｒ－ＭｎＯＯＨ上吸附的表面分级离子交换稳定常数Ｋｉ（ｉ     

浙江南部近海沉积物柱状样中脂类生物标志物的组成及形态分布

分析了浙江南部近海(东海陆架泥质区)沉积物柱状样中游离态和碱不稳定结合态脂类生物标志物的组成.沉积物中的脂肪酸呈现以C16脂肪酸为主峰的单峰形分布趋势,具明显偶碳优势,除表层沉积物中脂肪酸以游离态为主外,结合态为柱状样中脂肪酸的主要存在形态,脂肪酸的垂直分布主要由降解作用控制;以甾醇和脂肪醇为主体的醇酮组分主要以游离态...     

DISTRIBUTION AND ABUNDANCE OF THE CTENOP-HORE, PLEUROBRACHIA GLOBOSA MOSER IN THE NEARSHORE WATERS OF SOUTHEAST CHINA

The geographical distribution and seasonal abundance of Pleurobrachia globosu are analyzed on the basis of 806 samples taken from 91 stations in six sea areas along the southeast coast of China from April I960 to January 1979. This ctenophore species is seen in small quantities without evident annual peak, while it is seen throughout the year in southern Fujian in great quantities with three peaks. The annual quantity of the animal decreased gradually from southern Fujian northward and appeared in shorter periods. The peak number of annual quantity decreased gradully as well. It is tentatively concluded that in low temperatures (less than 25.5‰) salinity is a limiting factor for the dis-tribution of P. globosa while temperature takes over the control when salinities are low (less than 21.5‰)-The T-S-P diagram may be used to predict the occurrence of "bloom" of these animals and be useful for aquaculture in preventing unnecessary losses due to the predation of P. globosa.     

Impact of mesoscale eddies on particulate organic carbon flux in the western subarctic North Pacific

The mechanism that controls particulate organic carbon (POC) flux in the deep sea differs depending on the season and sea. The POC produced in the western subarctic North Pacific are known to be transported to the deep sea efficiently, but the direct relationship between the POC flux and physical processes is still unclear. In this study, we evaluated the effect of mesoscale eddies on POC flux in the western subarctic North Pacific. The seasonal and interannual variabilities of POC flux were investigated using data from a time-series sediment trap deployed at 4810 m at station K2 (47°N, 160°E) from 2005 to 2018. POC flux was high during May–November, appearing to reflect spring and fall blooms at the ocean surface. POC flux also showed interannual variability, with twelve peaks that were mostly affected by enhanced bloom just before the peak. Nine peaks of the twelve peaks were affected by mesoscale eddies, which enhanced bloom around K2 by extending the area with a high chlorophyll-a concentration along the coastal region into the offshore region, suggesting that mesoscale eddies strongly impact the interannual variability of POC flux at K2.

     

Using sediment geochemistry to infer temporal variation of methane flux at a cold seep in the South China Sea

Release of methane from the seafloor throughout the world's oceans and the biogeochemical processes involved may have significant effects on the marine sedimentary environment. Identification of such methane release events in marine sediment records can hence provide a window into the magnitude of ancient seeps. Here, we report on analysis of the geochemical composition of samples in a 12.3 m long sediment core (DH-5) collected from a seep site in the South China Sea (SCS). Our aim has been to investigate whether the evidence for the presence of methane release event within sediments is discernible from solid-phase sediment geochemistry. We show that sedimentary total sulfur (TS), δ³⁴S values of chromium reducible sulfur (δ³⁴S_CRS) along with total organic carbon (TOC) and total inorganic carbon (TIC) content can be used to infer the presence of methane release events in cold seep settings. At least three methane release events were identified in the studied core (Unit I at 400–550 cm, Unit II at 740–820 cm, and Unit III at 1000–1150 cm). According to the characteristic of redox-sensitive elements (eg., Mo, U and Mn), we suggest that methane flux has been changed from relatively high (Unit I) to low (Unit II and III) rates. This inference is supported by the coupled occurrence of ³⁴S-enriched sulfides in Unit II and III. AMS ¹⁴C dates from planktonic foraminifera in Unit I suggest that high methane flux event occurred at ∼15.4–24.8 kyr BP, which probably resulted in locally-focused aerobic methane oxidation. Overall, our results suggest that TS, TOC, TIC and δ³⁴S_CRS have potential for identifying present and fossil methane release events in marine sediments.     

厦门西海域浮游植物的生态

本文分析、鉴定了于1989年4月至1990年3月,逐月采自厦门西海域的7个站位的112份样品。结果表明,本海区浮游植物共129种,其中蓝藻1种,硅藻105种,金藻1种,甲藻22种。按其分布特点,可分为两大生态类群:广布种占57%,暖水种占43%。浮游植物细胞总量的季节分布是8月出现主高峰,5月为次高峰,3月是最低谷期。此外,对其数量分布和季节变化与海洋环境因素的关系,进行了较详细的讨论。     

Does sedimentary organic delta 13C record variations in quaternary ocean [CO2(aq)]?

Ocean surface water [CO2(aq)] variations based on glacial/interglacial changes in sediment delta 13Corg are shown to compare favorably with reconstructions based on ice core [CO2]. In particular, an approximate 80 microatmospheres increase in atmospheric pCO2 during the last glacial-interglacial transition is calculated to correspond to a 3-4 micromolar increase in ocean surface water [CO2(aq)] at atmospheric equilibrium. A widespread marine delta 13Corg decrease of 1-2% accompanied this event and was not preceded by an equivalent isotopic change in surface water total dissolved inorganic carbon. These observations support the hypothesis that [CO2(aq)] influences photosynthetic isotope fractionation between marine inorganic and organic carbon pools, and therefore that plankton/sediment delta 13Corg may serve as a proxy for surface water [CO2(aq)].     

Thermal sensitivity of native and invasive seabreams

This study compared the mortality and metabolic response of the Senegal seabream, Diplodus bellottii, an African species recently reported in Southern Europe and the white seabream Diplodus sargus, a native species, across a range of temperatures. The temperatures tested were 18, 26, 28 and 30 °C. Mortality was zero at 18 °C and very low at all other temperatures for both species, with the exception of D. bellottii, which experienced 32% mortality at 30 °C. Metabolic rates increased steadily with increasing temperatures, with a steep increase at 30 °C for D. bellottii. Thermal sensitivity ranged between 2 and 3 for both species and for all thermal intervals, with the exception of the thermal sensitivity between 28 and 30 °C for D. bellottii, which was 7. It was concluded that D. bellottii is under thermal stress at 30 °C. Diplodus bellottii may have expanded its distribution northwards due to an increase in sea surface temperatures. However, further warming may result in habitat loss for the juveniles, since Southern European estuarine systems will reach temperatures that may lead to lower fitness in juveniles of this species.     

Offshore geotechnical instrumentation

This brief discussion of instrumentation for geotechnical engineering applies to fixed bottom supported structures, as well as to sea floor connected floating structures, pipelines, and buoys. At the outset, it is important to recognize the interaction among: 1) local soil conditions at the site of a structure, 2) the structural configuration itself, and 3) the sampling and testing techniques that might be used. The interaction occurs, of course, in the sense that the types of soils that occur at sites certainly influence the techniques of soil sampling and testing that are appropriate. Further, the local soil conditions can influence the selection of the configuration of the structure and foundation system. Soil provides a basic foundation support for all of these sttuctures.     

10种蟹类18S rDNA 和COⅠ基因序列分析及其分子系统发育研究

应用分子系统发育学的方法,以蟹类18S rDNA和线粒体细胞色素C氧化酶亚单位Ⅰ(COⅠ)基因序列片段为分子标记,结合形态学特征对10种蟹类的分类地位进行探讨。实验共获得10 条18S rDNA序列,长度为1780~1787 bp,其中A、T, G,C平均含量分别为23.72%, 24.58%,24.52%和27.17%;通过序列对比,发现18S rDNA序列相对保守,只含有1个从88 bp 到130 bp 约 50 bp的高可变区;物种间碱基距离比较小,从0.001到0.017。18S rDNA系统发育树为方蟹总科、沙蟹总科和梭子蟹总科起源于同-海洋蟹类祖先提供了分于生物q证惦,开上火亚N内尔量分别为26.88%.弓蟹科。获得的5条CO Ⅰ基因序列,长度均为709 bp,A、T,G、C平均含量分别为26.88%,37.62%,17.50%和18.00%;COⅠ基因片段变异性高,物种间碱基距离从0.016到0.138。COⅠ基因系统发育树真实地反映了住属各物种之间的进化关系,和传统分类非常吻合,为形态特征相似的姆类鉴定提供了-种快速准确的方法。