1) characteristic δ~(13)C
δ13C特征
1.
The characteristic δ~(13)C could be a valuable factor in regional or global inventory estimation of methane.
研究测得中国阿苏卫垃圾填埋场甲烷δ13C特征值的一般范围为-54 9‰～-49 0‰,反映出了城市垃圾填埋场普遍的甲烷δ13C特征。
2) δ13C value
δ13C值
1.
In this study,by measuring stable carbon isotopes in leaves of 51 alpine plant species belonged to 19 families and 41 genera growing in the east of Tibetan Plateau in 2002 and 2003,we studied the variations of δ13C values between two year.
文章通过分析2002年和2003年青藏高原东部青海省门源县境内隶属于19科41属51种植物叶片的δ13C值,研究高寒草甸植物稳定碳同位素组成的年间变化及其与环境因子的关系,分析影响δ13C值变化的关键因子。
2.
Four long-term agricultural field experiments combined with an laboratory incubation experiment were conducted to evaluate the effect of organic,inorganic and organic+inorganic fertilizer application on δ13C value of soil organic matter(SOM)and humic acid(HA)in black soil,brown soil,meadow soil and paddy soil.
以黑土、棕壤、草甸土和水稻土为供试土壤,通过田间定位并结合室内培养试验,初步研究了不同施肥(包括施用化肥、有机肥以及有机肥配施化肥)条件下全土有机质和胡敏酸的δ13C值。
3.
The foliar δ13C values were used to denote the long-term water use efficiency(WUE)of plants whereas long-term nitrogen use efficiency(NUE)was estimated by the ratio of C to N.
对长汀水土流失区不同生态恢复程度生境马尾松(Pinus massoniana)与木荷(Schima superba)的叶片稳定碳同位素组成(δ13C)、比叶面积(specific leaf area,SLA)、叶N含量及C/N进行了分析,并以叶片δ13C值和C/N分别指示植物的水分利用效率(water use efficiency,WUE)和氮素利用效率(nitrogen use efficiency,NUE)。
3) characteristic
[英][,kærəktə'rɪstɪk] [美]['kærəktə'rɪstɪk]
特征
1.
The Types & Characteristics of Rattan Furniture Patterns;
藤家具图案纹样类型及特征
2.
Discussion on Characteristic of Loose Subsidence Pillar and Harmfulness to Producing in Malan Coal Mine;
马兰矿松散陷落柱特征及对生产危害性分析
3.
Study on some characteristics of the investment decision in coal engineering projects;
煤炭工程项目投资决策特征研究
4) character
[英]['kærəktə(r)] [美]['kærəktɚ]
特征
1.
The Analysis of Environmental and Economic Character of Industry in Three-gay Area;
三峡地区工业行业环境与经济行为特征分析
2.
Character and origin of eluvial deposits between the copper ore layers at Dongxiang mining area;
江西东乡铜矿层间溶蚀残积堆积物的特征及成因
3.
Study the Characteristics of AE Temporal Sequences in the Process of Failure and Deformation of Rock;
岩体破裂变形过程中AE时序特征研究
5) feature
[英]['fi:tʃə(r)] [美]['fitʃɚ]
特征
1.
Nonlinear percolation feature of low permeability reservoirs and its effect;
低渗油藏非线性渗流特征及其影响
2.
The features and operating technique of Chinese uncooked wheat koji;
我国生麦制曲特征和操作技艺
3.
The Process Planning of Refine Casting Mould to Turbine Blade Based on Feature and Operation;
基于操作与精铸模特征的工艺规程设计
6) Characteristics
[英][,kæriktə'ristik] [美][,kærəktə'rɪstɪk]
特征
1.
Basical characteristics of lead-zinc mineral resources and the vista on geological prospecteing of super large scale lead-zinc deposits in Yunnan;
云南铅锌资源基本特征及超大型铅锌矿床找矿前景
2.
Characteristics and Mutative Law of Smoking Qualities of Flue-cured Tobacco from the Chiefly Producing Area in Hunan Province of China;
湖南主产烟区烤烟感官质量特征及变化规律研究
3.
Occurrence of Cryptoexplosive Breccia and Porphyry Type Orebodies in Jiguanzui Deposit and Their Characteristics;
鸡冠嘴矿床隐爆角砾岩和斑岩型矿体的存在及其特征
补充资料：cis-Δ13:14-docosenoic acid
分子式： CH3(CH2)7CH:CH(CH2)11COOH
CAS号：
性质：又称顺(式)13-二十二碳烯酸。属脂肪酸类化合物。乙醇中针状结晶，熔点33.8℃。碘值74.98。相对密度0.860。沸点381.5℃(分解)。折射率1.4534。不溶于水，溶于乙醇、甲醇，易溶于乙醚。在自然界中存在于十字花科芸苔属植物白芥(Brassica alba)种子脂肪及菜子油中，含量颇高。有时也把α-羟-15-二十四碳烯酸。也包括在芥酸内。芥酸及其甘油酯可应用于食品工业或化妆品制造业。用于生产表面活性剂。
CAS号：
性质：又称顺(式)13-二十二碳烯酸。属脂肪酸类化合物。乙醇中针状结晶，熔点33.8℃。碘值74.98。相对密度0.860。沸点381.5℃(分解)。折射率1.4534。不溶于水，溶于乙醇、甲醇，易溶于乙醚。在自然界中存在于十字花科芸苔属植物白芥(Brassica alba)种子脂肪及菜子油中，含量颇高。有时也把α-羟-15-二十四碳烯酸。也包括在芥酸内。芥酸及其甘油酯可应用于食品工业或化妆品制造业。用于生产表面活性剂。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条