Proceedings of the Royal Society of London最新文献_第6页

V. The electric organ of the skate : observations on the structure, relations, progressive development, and growth of the electric organ of the skate 五、滑板电动器官:对滑板电动器官的结构、关系、渐进发展和生长的观察

Proceedings of the Royal Society of London Pub Date : 2012-05-13 DOI: 10.1098/rspl.1891.0063

J. C. Ewart

引用次数: 13

The circulation of the surface waters of the North Atlantic Ocean 北大西洋表层海水的环流

Proceedings of the Royal Society of London Pub Date : 2012-03-02 DOI: 10.1098/rspl.1899.0128

H. N. Dickson

引用次数: 8

III. On the tubercular swellings on the roots of vicia faba 3蚕豆根部结核性肿胀的探讨

Proceedings of the Royal Society of London Pub Date : 2012-01-28 DOI: 10.1098/rspl.1887.0075

H. M. Ward

引用次数: 10

I. New determination of the mechanical equivalent of heat 热的机械当量的新测定

Proceedings of the Royal Society of London Pub Date : 2012-01-28 DOI: 10.1098/rspl.1878.0009

J. P. Joule

引用次数: 1

IX. On a new series of chemical reactions produced by light 9关于光产生的一系列新的化学反应

Proceedings of the Royal Society of London Pub Date : 2011-11-13 DOI: 10.1098/rspl.1868.0012

J. Tyndall

引用次数: 15

XIII. Contributions to the anatomy of fishes. II. The air-bladder and Weberian ossicles in the siluroid fishes 十三。对鱼类解剖学的贡献。2琵琶鱼的气囊和韦伯小骨

Proceedings of the Royal Society of London Pub Date : 2011-09-04 DOI: 10.1098/rspl.1892.0063

T. W. Bridge, A. C. Haddon

引用次数: 99

The Ascent of Water in Trees. 水在树中的上升。

Proceedings of the Royal Society of London Pub Date : 2011-07-18 DOI: 10.1098/rspl.1904.0156

A. J. Ewart

{"title":"The Ascent of Water in Trees.","authors":"A. J. Ewart","doi":"10.1098/rspl.1904.0156","DOIUrl":"https://doi.org/10.1098/rspl.1904.0156","url":null,"abstract":"In the earlier discussions of this problem, it has been tacitly assumed that it was only necessary to find forces sufficient to balance a head of water equal to the height of the loftiest tree to explain the ascent of sap in it. The problem is, however, rather one of dynamics than of statics, for we have to find forces sufficient not only to balance the head of water, but also to keep this water moving upwards in narrow tubes with a velocity varying from a few centimetres to as much as 6 metres per hour. Janse has in fact shown empirically, and his results have been confirmed by Strasburger, that to drive water through the stem of a Conifer at the transpiration rate requires a head of water several times the length of the stem. Water is a liquid of definite viscosity, and the resistance offered even to its slow flow through tubes of small diameter and considerable length is a factor of great importance. The purpose of the following research has been to find the amount of this resistance in definite cases, the forces required to overcome it, and hence the total force required to raise the water with sufficient rapidity to the summit of an actively transpiring tall tree. Furthermore, an attempt has been made to determine the possible means by which this force could be generated, and propagated in the conducting wood.","PeriodicalId":20661,"journal":{"name":"Proceedings of the Royal Society of London","volume":"74 1","pages":"554 - 556"},"PeriodicalIF":0.0,"publicationDate":"2011-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1098/rspl.1904.0156","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"61716953","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 34

Researches on the blood.—On the action of nitrites on the blood 血液研究。亚硝酸盐对血液的作用

Proceedings of the Royal Society of London Pub Date : 2010-10-17 DOI: 10.1098/rspl.1867.0071

A. Gamgee

{"title":"Researches on the blood.—On the action of nitrites on the blood","authors":"A. Gamgee","doi":"10.1098/rspl.1867.0071","DOIUrl":"https://doi.org/10.1098/rspl.1867.0071","url":null,"abstract":"The paper commences with a statement of the facts with which we are at present acquainted, relating to the nature and character of the blood-colouring-matter, and its relation to gases. I. The action of nitrites in modifying the colour and spectrum of blood is then described. Under the influence of nitrites, arterial blood assumes a chocolate coloration. Coincidently the bands of scarlet cruorine (oi oxidized hæmoglobin) become very faint, and an additional absorption band, occupying the same position as that of acid hæmatin, appears. The addition of ammonia to blood in which nitrites have induced the characteristic change of colour and spectrum, causes the red colour to return and gives rise to a new spectrum in which the normal blood-bands are again better defined, but accompanied by a faint and rather undefined absorption band in the orange. It appears from the experiments of the author that the change in optical properties induced by ammonia is not due to any decomposing action exerted upon the body formed under the influence of nitrites; for on neutralizing the solution to which ammonia has been added, the original spectrum is reproduced. When sulphide of ammonium, oi a reducing-solution of iron is added to a blood solution which has been acted upon by nitrites, all effects of their action disappear, and the solution again possesses the spectrum of oxidized blood-colouring-matter, although precautions have been taken to exclude atmospheric air. The continued action of the reducing-solution then leads to the reduction of the blood-colouring, matter, which when shaken with air again yields the perfectly normal spectrum of blood. It would therefore appear that when nitrites act upon the blood-colouring-matter they do not decompose it, nor thrust out oi remove the loose oxygen with which it is combined.","PeriodicalId":20661,"journal":{"name":"Proceedings of the Royal Society of London","volume":"1 1","pages":"339 - 342"},"PeriodicalIF":0.0,"publicationDate":"2010-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1098/rspl.1867.0071","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"62183930","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 19

An experimental investigation into the flow of marble 大理石流动的实验研究

Proceedings of the Royal Society of London Pub Date : 2010-08-16 DOI: 10.1098/rspl.1900.0024

F. Adams, J. T. Nicolson

引用次数: 30

On the sources of the nitrogen of vegetation; with special reference to the question whether plants assimilate free or uncombined nitrogen 试论植被氮的来源特别是关于植物是否吸收游离氮或不结合氮的问题

Proceedings of the Royal Society of London Pub Date : 2010-05-16 DOI: 10.1098/rspl.1859.0109

J. Lawes, J. Gilbert, E. Pugh

{"title":"On the sources of the nitrogen of vegetation; with special reference to the question whether plants assimilate free or uncombined nitrogen","authors":"J. Lawes, J. Gilbert, E. Pugh","doi":"10.1098/rspl.1859.0109","DOIUrl":"https://doi.org/10.1098/rspl.1859.0109","url":null,"abstract":"After referring to the earlier history of the subject, and especially' to the conclusion of Saussure, that plants derive their nitrogen from the nitrogenous compounds of the soil and the small amount of ammonia which he found to exist in the atmosphere, the Authors preface the discussion of their own experiments on the sources of the nitrogen of plants, by a consideration of the most prominent facts established by their own investigations concerning the amount of nitrogen yielded by different crops over a given area of land, and of the relation of these to certain measured, or known sources of it. On growing the same crop year after year on the same land, without any supply of nitrogen by manure, it was found that wheat, over a period of 14 years, had given rather more than 30 lbs.—barley, over a period of 6 years, somewhat less—meadow-hay, over a period of 3 years, nearly 40 lbs.— and beans, over 11 years, rather more than 50 lbs. of nitrogen, per acre, per annum. Clover, another leguminous crop, grown in 3 out of 4 consecutive years, had given an average of 120 lbs. Turnips, over 8 consecutive years, had yielded about 45 lbs.","PeriodicalId":20661,"journal":{"name":"Proceedings of the Royal Society of London","volume":"1 1","pages":"544 - 557"},"PeriodicalIF":0.0,"publicationDate":"2010-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1098/rspl.1859.0109","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"62143765","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 12