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  “镁—”译为未确定词的双语例句
     L -1 KOH (pH=12.6),a sensitive adsorptive complex wave of Mg(Ⅱ)-Rutin can be obtained by single-sweep polarography. The change in peak height with the concentration of Mg(Ⅱ) is liearin, the range from 1.0×10 -7 to 5.0×10 -6 mol.
     L- 1KOH底液中(pH= 12.6),用单扫示波极谱法可获得镁—芦丁络合物吸附波,镁浓度在1.0×10- 7~5.0×10- 6m ol.
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     Mg-Protoporphyrin Ⅸ (MP) , a tetrapyrrole intermediate in the plastid act as a plastid signal.
     质体中进行的四吡咯代谢的中间产物镁—原卟啉Ⅸ(Mg-ProtoporphyrinⅨ,MP)就是这样一类质体信号。
短句来源
     The colour reaction system of magnesium with dibromo-o-carboxychlorophosphonazo was studied. The maximum absorption of the complex is at 618nm and the molar absorptivity is 1 5×10 4 L·mol -1 ·cm -1 ,Beer's law is obeyed in the range of 0~16 μg/25ml.
     在镁—二溴羧基偶氮氯膦显色体系中生成的络合物的最大吸收波长λmax=618nm、摩尔吸光系数ε=1.5×104L·mol-1·cm-1,镁含量0~16μg/25ml浓度符合比耳定律。
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     The advanced treatment of landfill leachate from a power plant in Guangdong Province by magnesium ammonium phosphate and coagulation method was studied. Results showed that efficient sedimentation of magnesium ammonium phosphate was obtained under the condition of pH 10.5 and Mg:P:N of 1.8:1.6:1 in the landfill leachate.
     采用磷酸铵镁—混凝法对广东某环保发电厂经混凝-生化处理后的垃圾渗滤液进行深度处理,实验结果表明:磷酸铵镁在渗滤液pH为10.5,Mg∶P∶N=1.8∶1.6∶1条件下沉淀效果较好;
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     The results indicated that no-tillage with ridge culture of paddy field was advantage to the formation of soil structure, the aggregation rate of < 0.01 mm soil particle increased, the ratios of the content of >0.01 mm organic microaggregate and the content of >0.01 mm iron-alumina and organic microaggregate increased in a different degree, the contents of >0.01mm inorganic microaggregate and calcium-magnesium and organic microaggregate lowered significantly.
     结果表明:稻田长期垄作免耕有利于土壤结构的形成,土壤中<0 01mm土粒团聚度增大,>0 01mm有机微团聚体和>0 01mm铁、铝—有机微团聚体所占比例表现为不同程度的提高,>0 01mm无机微团聚体和钙、镁—有机微团聚体显著下降。
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     S and Mg;
     硫和;
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     Magnesium Salicylate
     水杨酸
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  magnesium-
Crystal Structure of a Magnesium-Rich Triclinic Analogue of Greifensteinite
      
Specific Features of the Synthesis of Porous Materials Based on a Magnesium-Aluminum Spinel
      
The optimum conditions are determined for treatment of two-phase materials with the aim of preparing ceramics based on the magnesium-aluminum spinel with an accessible porosity of higher than 50%.
      
Catalytic Self-Hydrogenation of Anthracene in the Presence of a Magnesium-Anthracene Adduct
      
In the presence of a cluster magnesium-anthracene adduct at 150-298 K, the self-hydrogenation of anthracene occurred with yields of up to 40 molecules per atom of magnesium.
      
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A.The Soils Since the goological formation of this mountainous area is quite uniform,a vertical distribution of soils is obviously observed. At the top of the mountain with an elevation of 8,500 feet,the podzolic soil is found. The process of podzolization is clearly shown by the translocation of clays,organic matter, and active aluminum from an upper to lower layer.The gray brown podzolic soil is distributed in areas ranging from 7,000 to 8,500 feet in elevation.It is developed under forest and has a...

A.The Soils Since the goological formation of this mountainous area is quite uniform,a vertical distribution of soils is obviously observed. At the top of the mountain with an elevation of 8,500 feet,the podzolic soil is found. The process of podzolization is clearly shown by the translocation of clays,organic matter, and active aluminum from an upper to lower layer.The gray brown podzolic soil is distributed in areas ranging from 7,000 to 8,500 feet in elevation.It is developed under forest and has a surface covering of leaf litter and a surface soil with high content of organic matter.In places at an elevatin from 3,900 to 7,000 feet the yellow podzolic soil is dominant.At an elevation below 3,000 foot the red podzolic soil and the sketetal soil are fonnd. The analytical data of the soils of this area may be summarized as follows: 1.pH values of the soils:In the whole area,since the parent rock (gneiss) is poor in basic constituents,soils are all acid in reaction.The pH of the different horizons of the soils ranges from 4.0 to 5.5.The A_0 and A_1 horizons are usually less acid than B horizon,the A and B horizons are much more acid than the parent rock.This shows the leaching process of the soils under such a humid atmosphere. 2.Organic Matter of the soils:The organic matter content of the soils in this area is greatlg influenced by the kind of the vegetation cover.At an elevation of 8,500 feet, the soil developed under forest has 38.92% of organic matter in the A_1,while that under grass has only 11.08% of organic matter in the corresponding horizon.However as the vegetation cover is constant,the dopth of the A_1 and its organic matter content are evidently affected by the elevation.At an elevation of 3,000 feet,the A_1 horizon of the red podzolic soil is only 1 cm.in depth,and it has 3.37% of organic matter.At an elevation of 8,500 feet,howerver,the A_1 horizon of the podzolic soil is 7 cm.in depth, and it has 11.08% of organic matter.In addition,deposition of organic matter in the B horizon is clearly found in the podzolic soil,but it has not been seen in soils found at lower elevation. 3.Active aluminum of the soils:All the soils in this area are high in active aluminum. They contain from 20 to 16 p.p.m.of active aluminum.The content of active aluminum in the different horizons of the same profile has a very close relationship with the pH values of the corresponding horizon.The less acid the reaction the smaller is the amount of acitve aluminum.The active aluminum of the soil is usually higher in amount than that of the parent rock from which the soil is derived. 4.Available calcium magnesium,and potassium of the soils:All the soils are general- ly low in available calcium,magnesium,and potassium.The comparatively high content of these elements in the A horizon is derived from the leaves of the vegetation which are grown on that soil. 5.Available phosphorus of the soils:All the soils of this area are low in available phosphorus. 6.Available nitrate:All soils in this area are very low in nitrate. B.The Vegetation 1.The plants growing on soils of this area are most calcifuge species which are acid- loving (Vaughan and Wishe,1937).As far as the chemical analysis of the soil is concer- ned,those species may be assumed as not only acid-loving,buy also active aluminum- loving (Hutchinson,1943). 2.The distribution of the calcifuge plants In this area is apparently affected by the local climate in terms of elevation.Some of them (temperate plants) are confined to high elevation,others(tropical plants) being limited to low elevation,Two groups of the plants may be given as follows.Many of them are of the same species as those found in southwestern China (Hou,1944). (a) Plants mainly ocurring in areas at elevations from 7,000 to 8,500 foot (temperate plants): Pteridophyta: Destaedtia Scabra (Wall.) Moore Diranopteris linearis Under. Hicrioptris glauea Under. Hymenophyllum crispatum Wall. Hymenophyllum exsertum Wall. Lidsaya cultrata Sw. Lycopodium clavatum L. Plagiogyria pyphylla (Kunze) Mett. Pteridium aquilinum Wightianum Trym Pteris aspericaulis Wall. Flowering Plants: Castanopsis tribuloides A.DC. Lindera pulcherrima Bth. Osbeckia crinata Bth. Rhododendron arboreum Sm. Rhododendron grande Wight Pieris formosana D.Don Vaccinium refersceda HK. Vaccinium serrasum Wight (b) Plants mainly ocurring in areas at elevation from 1,000 to 3,000 feet (tropical plants): Pteridophyta: Adiantum philippense L. Blechnum orientale L. Aglaoorpha coronaus Copel Lycopodium cernum L. Nephrolepsis cordifolia Presl Tectaria spp. Polypodium ucidum Roxb. Flowering plants: Oxyspora paniculate DC. Themeda arundinacea Ridl.

1945年10月中旬,作者留印三月另一周,曾作三次野外调查,计包括印缅边区、恒河平原及喜马拉雅山东南麓等三区,茲先将大吉岭区调查结果,草成此文。调查区域大吉岭位于喜马拉雅山东南麓,在我国西藏边境,全区是山地,海拔自1000到9000尺不等,主为酸性的片麻岩地层,在拔海6500尺地点,年平均气温为56.3℉.,年雨量为122寸。土壤灰壤——灰棕壤组合:在拔海8500尺左右的山顶,灰壤见于草地上,而灰棕壤则发育在森林之下。灰棕壤——灰化黄壤组合:在拔海7000—8000尺地带,森林下仍是灰棕壤,而草地上则为灰化黄壤。灰化黄壤——粗骨土组合:在拔海1000—3000尺地带,片麻岩生成灰化红壤,酸性砂岩生成砾质土。全区土壤特征可归纳如下: (1)土壤 pH 值:全区因土壤母质为酸性片麻岩,各类土壤剖面亦为酸性反应;pH 值约自4.0至5.5。A_1层之 pH 值恒较 B 层为大,而土壤剖面内之 A 层及 B 层均较母岩之酸度为高。 (2)土壤有机质:从土壤有机质分析结果观之,显示植物种类对于土壤有机质之含量高低,有密切的关系,在拔海8500尺之地带,发育于森林下的灰棕壤,表土含有机质38.92%,而同处草类和蕨类植物...

1945年10月中旬,作者留印三月另一周,曾作三次野外调查,计包括印缅边区、恒河平原及喜马拉雅山东南麓等三区,茲先将大吉岭区调查结果,草成此文。调查区域大吉岭位于喜马拉雅山东南麓,在我国西藏边境,全区是山地,海拔自1000到9000尺不等,主为酸性的片麻岩地层,在拔海6500尺地点,年平均气温为56.3℉.,年雨量为122寸。土壤灰壤——灰棕壤组合:在拔海8500尺左右的山顶,灰壤见于草地上,而灰棕壤则发育在森林之下。灰棕壤——灰化黄壤组合:在拔海7000—8000尺地带,森林下仍是灰棕壤,而草地上则为灰化黄壤。灰化黄壤——粗骨土组合:在拔海1000—3000尺地带,片麻岩生成灰化红壤,酸性砂岩生成砾质土。全区土壤特征可归纳如下: (1)土壤 pH 值:全区因土壤母质为酸性片麻岩,各类土壤剖面亦为酸性反应;pH 值约自4.0至5.5。A_1层之 pH 值恒较 B 层为大,而土壤剖面内之 A 层及 B 层均较母岩之酸度为高。 (2)土壤有机质:从土壤有机质分析结果观之,显示植物种类对于土壤有机质之含量高低,有密切的关系,在拔海8500尺之地带,发育于森林下的灰棕壤,表土含有机质38.92%,而同处草类和蕨类植物发育下的灰壤的表土,仅含有机质11.08%,但在相同的植物环境下,拔海高度或局部气候,也是支配土壤有机质含量的重要因素,例如在拔海3000尺地带,长有草类的灰化红壤,仅有极薄之有机质层,该层有机质含量为3.37%,而在拔海8500尺地带,长有草类的灰壤,则有较厚层有机质,其含量为11.08%。 (3)可溶性铝质:全区土壤含有高量可溶性铝,大约自20至160 p.p.m.,其含量与 pH 值高低相关,土壤 pH 值愈酸,可溶性铝含量就愈高。 (4)可溶性钙及钾质:全区土壤之可溶性钙,及钾等之含量均较低,但就同一土壤剖面而言,富于有机质的 A。或 A_1层的钙和钾质,常较 B 层为高,此点显示此等成份是来自植物遗体,亦即指示土壤中有机质与肥力之关系。 (5)全区土壤有效磷含量均甚低。 (6)全区土壤硝酸态氮之含量均极低,并有下淋现象。植物本文所论植物,仅以作者所采集而经各专家鉴定为限,其中以蕨类植物为主。本区的土壤都是酸性反应,所见的植物是以嫌钙性者为主,这些嫌钙性植物与拔海高度的关系很显著,兹将常见的植物种类,叙述如下: (一)主分布于拔海7000—8500尺地带的植物: 蕨类植物 Dennstaedtia scabra(Wall.)Moore Dicranopteris linearis Under. Hicriopteris glauca Under. Hymenophyllum crispatum Wall. Hymenophyllum exsertum Wall. Lindsaya cultrata Sw. Lycopodium clavatum L. Plagiogyria pycniphylla(Kunze)Mett. Pteridium aquilinum Wightianum Trym. Pteris aspericaulis Wall.种子植物 Castanopsis tribuloides A.DC. Lindera pulcherrima Bth. Osbeckia crinata Bth. Rhododendron arboreum Sm. Rhododendron grande Wight Pieris formosana D.Don Vaccinium referesceda HK. Vaccinium Serrasm Wight(二)主分布于1000—3000尺地带的植物: 蕨类植物Adiantum philippense L.Blechnum orientale L.Aglaomorpha coron(?)us copelLycopodium cernuum L.Nephrolepsis cordifolia PresslTectaria spp.Polypodium lucidum Roxb.种子植物Oxysoira paniculata DC.Themedra arundinacea Ridl.

Die Bestimmungsmethode für Magnesium mittels Titangelbs wird untersucht.Daraus ergibt sich folgendes:Obwohl durch Zusatz von Kalziumionen die Farbe des MagnesiumTitangelbs vertieft wird,gehorcht die Eichkurve dem Beerschen Gesetz zueinem geringeren Grade als diejenige ohne Kalziumzusatz.In Konzentrationen von weniger als 250 mg pro Liter,geben Bariumionenallein mit Titangelb keine Farbe,whrend in hheren Konzentrationen siedas Titangelb ausflocken.Für Magnesiumbestimmung kann 100-150 mg vonBarium pro Liter...

Die Bestimmungsmethode für Magnesium mittels Titangelbs wird untersucht.Daraus ergibt sich folgendes:Obwohl durch Zusatz von Kalziumionen die Farbe des MagnesiumTitangelbs vertieft wird,gehorcht die Eichkurve dem Beerschen Gesetz zueinem geringeren Grade als diejenige ohne Kalziumzusatz.In Konzentrationen von weniger als 250 mg pro Liter,geben Bariumionenallein mit Titangelb keine Farbe,whrend in hheren Konzentrationen siedas Titangelb ausflocken.Für Magnesiumbestimmung kann 100-150 mg vonBarium pro Liter den Kalziumzusatz ersetzen,doch ergibt sich hieraus keinVorteil.Für den Einfluss von Barium-und Molybdationen(mit Zusatz vonKalziumsalz)wird es gefunden,dass Barium bis zu 600 mg pro Liter undMolybdat bis zu 1300 mg pro Liter die Methode kaum beeinlussen.Ingrsseren Konzentrationen wird die Farbe des Magnesium-Titangelbs durchBariumionen verstrkt,whrend sie durch Molybdationen geschwcht wird.Die Sohwchung der Farbe des Magnesium-Titangelbs durch Molybdationenkann man dadurch erklren,dass Molydationen die Kalziumionen dem Systementziehen,weil Kalziummolybdat schwer lslich ist.

1.本文比较了有钙或无钙存在时地丹黄定的不同之点。2.关于钡离子影响和地丹黄沉淀色料之颜色的深浅程度,本文作一定量的探讨。3.本文并报告钡离子及钼酸根离子对地丹黄定法(含钙溶液)的影响。

An electrophotometric method has been worked out for the determination of magnesium in cast iron using titan yellow as indicator.Briefly,the method consists of dissolving the sample in dilute sulphuric acid,separating iron and other metals such as copper and nickel by electrolysis with mercury cathode and precipitating manganese from ammoniacal solution with ammonium persulfate.Ammonimn salt,silica and traces of aluminaare thenremoved. Finally,the prepared titan yellow reagent is added to the solutionand the...

An electrophotometric method has been worked out for the determination of magnesium in cast iron using titan yellow as indicator.Briefly,the method consists of dissolving the sample in dilute sulphuric acid,separating iron and other metals such as copper and nickel by electrolysis with mercury cathode and precipitating manganese from ammoniacal solution with ammonium persulfate.Ammonimn salt,silica and traces of aluminaare thenremoved. Finally,the prepared titan yellow reagent is added to the solutionand the magnesium content determined from the electrophotometric reading.The time required for each determination is approximately 5 hours. The effect of interfering elements which are likely present in cast iron such as manganese, silicon,phosphorus, aluminum, copper, nickel and vanadium as well as ammonium ion and alkali and alkaline earth metals has been studied and discussed.It has been shown that manganese, silicon, aluminum,copper,nickel,iron and ammonium ions can be removed down to such low values as to cause no significant interference.Phosphorus under 0.4% has no appreciable effect.Vanadium is not separated in the present method,but fortunately it is usually present in insignificant amounts in ordinary cast iron.The effect of calcium is compensated by the introduction of saturated calcium sulphate solution before the titan yellow addition. Potassium and sodium have no appreciable effect when present in small amounts. The results obtained by the present method for the determination of magnesium in 11 known samples are good,the average difference being 0.002% in a range of 0.000% to 0.140% Mg.The data obtained by the present method are also in good agreement with those obtained by gravimetric methods On seven nodular iron samples made by the Metallurgical Division of our Institute.A detailed procedure for the determination of magnesium in cast iron has been suggested and included in this paper.In view of its rapidity and fair accuracy,the new photometric method might prove useful for the purpose of control in a nodular iron foundry.

本文报告将地丹黄比色法应用於测定铸铁中之的试验结果.如将铁、锰、铝、矽等干扰物质预先除去,则的测定并无困难.依照本文所擬的方法分析,所需时间约为五小时,较重量法迅速得多.

 
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