1.The main carbon modes of occurrence in the nepheloid layer are particulate organic carbon(POC),dissolved organic carbon(DOC), colloidal organic carbon(COC) and inorganic carbon, and the material exchange and transport of different carbon modes between nepheloid layer ambient seawater and sea bottom sediment take place under the actions of the bio-chemico-physico dynamic system, so the nepheloid layers play an important role in ocean carbon cycle and are a nonnegligible link in the entire ocean carbon cycle.
雾状层中碳的存在形态主要有颗粒有机碳(POC)、溶解有机碳(DOC)、胶体有机碳(COC)以及无机碳,雾状层与其上下海水之间、雾状层与海底表层沉积物之间不同形态碳在生物-化学-物理动力系统作用下不断发生物质交换与迁移,对海洋碳循环生物地球化学过程起重要的控制作用,是整个海洋碳循环的一个不可忽视的环节。
2.For C-(14) fatty acids and C-(16)C-(18) saturated fatty acids, the organic solvent abstract remove result is remarkable, but for C-(20)C-(22) saturated fatty acids, the result is faint.
有机溶剂分级提取对14碳短碳链的饱和与不饱和脂肪酸及16碳、18碳的饱和脂肪酸的脱除效果是明显的,但对脱除20碳、22碳的长碳链饱和脂肪酸的效果不明显。
3.Fabricated T300 carbon - reinforced unidirectional carbon/carbon composite materials using CVD method, determined the fracture life of the materials in the temperature of 2000℃ and 2100℃.
为了研究碳/碳复合材料作为高温结构材料的高温持久性能,用化学气相沉积(CVD)法制备了T300碳纤维增强热解碳的单向碳/碳复合材料,并用特殊设计的设备测定了该材料在2000℃,2100℃高温下的断裂寿命,结果高于室温下的断裂寿命。 这种测试方法可能对于碳/碳复合材料正式用于高温结构具有重要意义。
4.Abstract: Comparision is made between the characteristics of recovered WCand conventional WC by clectronic probe detection.In view of perfect crystal lization,less defect in the crystal and sufficient compound carbon,cemented carbide superior to conventional WC is developed by process optimization to compensate for the high O2 content and more inclusions in the recovered WC.
文摘:用电子探针检测手段对比了回收碳化钨和一般碳化钨的不同特性，从回收碳化钨具有结晶完整、晶内缺陷少、化合碳充足等优良性能出发，用工艺优化手段弥补回收碳化钨氧含量高、夹杂物多等缺点，试制出了性能优于用一般碳化钨生产的硬质合金。
5.The effect of processing parameters such as carbon potential, carbonizing temperature, quenching temperature on the rules of effective harden layer, microstructure, interior rigidity, distribution of hardness and carbon concentration were studied.
研究了20CrMoH 汽车齿轮用钢在连续渗碳生产线不同区域渗碳过程的碳势、渗碳温度、淬火温度等工艺参数对有效硬化层、显微组织、表面硬度、心部硬度以及碳浓度分布和渗碳层硬度分布的影响规律。
6.In contrast, the estimated carbon flux of large copepods (>330μm) was high to 108.67mg C m -2 day -1 , making up 95.3% of the total macro zooplankton carbon flux. The fact that apparent carbon flux of macro zooplankton was 2 3 orders magnitude higher than phytoplankton carbon flux, displays an obvious feature of high zooplankton carbon and low phytoplankton carbon in the water column in the ice melting duration in Chukchi Sea.
然而 ,真光层大型桡足类的碳估算值高达 1 0 8.67mgCm- 2day- 1 ,占浮游动物总碳量的 95 .3 % ,大型浮游动物的表观碳通量高于浮游植物碳通量 2— 3个数量级 ,显示楚科奇海夏季融冰期高浮游动物碳量、低浮游植物碳量的特点。
7.To treat, combine, or impregnate with carbon, as when casehardening steel.
使渗碳，碳化使与碳一起处理，使与碳混合或使充满碳，如将钢的表面粹火硬化
8.This study was conducted to examine soil organic carbon and nitrogen contents in major grassland types along elevation gradients in the source region of Yangtze, Yellow and Lantsang Rivers. Soil organic carbon and nitrogen contents were greater at the highest (5 120 m a.s.l.) and lowest (4 176 m a.s.l.)
结果表明:沿着海拔的逐渐升高,土壤有机碳和全氮含量均呈现出“V”字形变化规律,即土壤有机碳氮含量在海拔最高处(5120m)和最低处(4176m)比较高,而在中间海拔梯度较低,土壤有机碳与全氮含量极显著相关(r=0.905)且高寒草甸土壤碳、氮含量高于高山草原土壤碳、氮含量;
9.The contributions of the undergrowth,litter layer,coarse woody debris (CWD) and dead fine root to the total carbon pool was no more than 1%.
格氏栲和杉木人工林乔木层碳库分别占人工林碳库的65.9%和57.5%,矿质土壤层碳库则分别占32.5%和40.3%,而2种森林的林下植被层、枯枝落叶层、粗木质残体和死细根碳库占人工林碳库均不超过1%。
10.Soils were selected from several plantations, including Picea asperata Pinus tabulaeformis, Pinus armandii and Larix kaempferi and secondary shrub in Dagou Watershed of the upper reach of Minjiang River. The measurement of TOC, SMBC,WSOC and EOC were made, because these parameters can reflect change of soil characteristics.
本研究选择岷江上游大沟流域的几种人工林(云杉林、油松林、华山松林、日本落叶松林)以及次生落叶阔叶灌丛下土壤,通过剖面机械分层取样,测定土壤总有机碳(TOC)和三种活性碳组分微生物碳(SMBC)、水溶性碳(WSOC)、易氧化碳(EOC)等来反映土壤变化特点。
