A comparison of prices during the civil war and present war

Price section. Division of planning and statistics. War industries board. November,1918.

12-钼磷酸四丁基铵杂多蓝的光化学合成表征与晶体结构

用450W高压汞灯照射H3PMo12O40·5H2O和（Bu4N）Br（TBA）的DMF（N,N-二甲基甲酰胺）溶液,合成了12-钼磷酸四丁基铵杂多蓝（Bu4N）4[PMo12O40]·2DMF·H2O,用元素分析,IR,固体漫反射电子光谱,ESR,XPS和CV等进行了表征。晶体结构分析表明,标题化合物属单斜晶系,空间群P21/c,晶胞参数a=14.124（3）,b=17.481（4）,c=22.744（5）A,β=101.66（3）°,V=5500（2��A3,C70H160Mo12N6O43P,Mr=2956.29,Z=2,Dc=1.785g/cm3,F（000）=2970,μ（MoKα）=1.412mm-1,R=0.0638,wR=0.1975。标题化合物是由4个四丁基铵阳离子、1个12-钼磷混合价杂多阴离子[PMo12O40]4-、2个DMF分子和1个水分子构成。

低碳钢在海底沉积物中的腐蚀行为

海底沉积物环境下钢铁的腐蚀和防护问题由于人们对海洋的广泛的开发和利用而逐渐引起人们的注意。本文对钢在海底沉积物中的腐蚀行为进行了模拟海底沉积物环境下的失重实验和电化学测量，以探讨海底沉积物环境下的钢的腐蚀行为和作用机制。失重法埋片实验表明，在没有微生物影响的海底沉积物中，钢的腐蚀速度与海洋腐蚀环境的其它区带相比是较低的��A3钢在砂型海底沉积物中的腐蚀速度约是其在粘土型海底沉积物中腐蚀速度的2倍。另外，主要用电化学方法研究��A3钢在海底沉积物中的腐蚀行为，包括线性极化阻力测量，弱极化区的动电位扫描测量和电化学交流阻抗谱（EIS）测量，计算��A3钢在海底沉积物中腐蚀的有关电化学参数，探讨��A3钢在两种类型海底沉积物中的腐蚀行为差异。认��A3钢在砂型和粘土型海底沉积物中腐蚀速度大小的差别主要是由于作为阴极去极化剂的氧在不同类型海底沉积物中的扩散速度不同。通过弱极化数据拟合和IES测量的结果表明��A3钢在海底沉积物中的腐蚀机制主要是受阴极去极化剂的氧扩散控制作用。并提出了初期腐蚀过程的等效电路和腐蚀模式图。本文较系统的研究��A3钢在海底沉积物中的电化学腐蚀行为，并首次将弱极化曲线拟合技术应用于海底沉积物腐蚀研究，得到了一些有意义的结果。结��A3钢在不同类型海底沉积物中的阻抗谱特征，提出了相应的等效电路和腐蚀模型。

Organotin Complexes of Alizarin and Purpurin

Five novel organotin complexes with the anthraquinone dyes alizarin (1,2-dihydroxyanthraquinone) and purpurin (1,2,4-trihydroxyanthraquinone) were synthesized and characterized by elemental analyses, FTIR and NMR spectroscopy ((1)H, (13)C and (119)Sn). The crystal and Molecular structures Of four complexes were determined by X-ray diffraction on single crystals: [Bu(2)Sn(aliz)(H(2)O)]center dot C(2)H(5)OH (A1 center dot EtO H), [Bu(2)Sn(aliz)(dmso)](2) (A3), [(Bu(2)Sn)(3)O(Hpurp)(2)] (P1) and [Bu(2)Sn(Hpurp)(dmso)](2) (P2), where H(2)aliz = alizarin and H(3)purp = purpurin. The coordination mode of the ligands is identical to that found in their Al/Ca complexes, where they act as dianionic tridentate ligands forming five and six-membered fused chelate rings. The coordination to the tin atoms occurs exclusively via the 1,2- phenolate oxygen and the adjacent quinoid oxygen atoms. The complexes A1, A3 and P1 are dimers with hepta-coordinated tin atoms in form of a slightly distorted pentagonal bipyramid. The trinuclear complex P2 contains two pentacoordinated and one heptacoordinated tin atoms.

Dalla geometria con riga e compasso alla geometria con origami

Lo scopo di questo lavoro è mostrare la potenza della teoria di Galois per caratterizzare i numeri complessi costruibili con riga e compasso o con origami e la soluzione di problemi geometrici della Grecia antica, quali la trisezione dell’angolo e la divisione della circonferenza in n parti uguali. Per raggiungere questo obiettivo determiniamo alcune relazioni significative tra l’assiomatica delle costruzioni con riga e compasso e quella delle costruzioni con origami, antica arte giapponese divenuta recentemente oggetto di studi algebrico-geometrici. Mostriamo che tutte le costruzioni possibili con riga e compasso sono realizzabili con il metodo origami, che in più consente di trisecare l’angolo grazie ad una nuova piega, portando ad estensioni algebriche di campi di gradi della forma 2^a3^b. Presentiamo poi i risultati di Gauss sui poligoni costruibili con riga e compasso, legati ai numeri primi di Fermat e una costruzione dell’eptadecagono regolare. Concludiamo combinando la teoria di Galois e il metodo origami per arrivare alla forma generale del numero di lati di un poligono regolare costruibile mediante origami e alla costruzione esplicita dell’ettagono regolare.

First πK atom lifetime and πK scattering length measurements

The results of a search for hydrogen-like atoms consisting of π∓K±π∓K± mesons are presented. Evidence for πK atom production by 24 GeV/c protons from CERN PS interacting with a nickel target has been seen in terms of characteristic πK pairs from their breakup in the same target (178±49178±49) as well as in terms of produced πK atoms (653±42653±42). Using these results, the analysis yields a first value for the πK atom lifetime of View the MathML sourceτ=(2.5−1.8+3.0) fs and a first measurement of the S-wave isospin-odd πK scattering length View the MathML source|a0−|=13|a1/2��a3/2|=(0.11−0.04+0.09)Mπ−1 (aIaI for isospin I).

Oracion funebre, que en las anniversarias Honras de los militares defuntos de España, celebradas en la Santa Iglesia de Mexico

Según Palau, XI, 201420, fué impreso en la ciudad de México, en el año 1768

Business problems of the war

Diversity, fertilize, motorize, specialize.--The truth about the price of meat.--Lest women realize.--Our diminishing herds.--Why the banker should help to increase livestock production.--Food shortage: an appeal to physicians.--Stabilizing business.--Enthusiam.--Thoroughness.

Tratado definitivo de paz concluido entre el Rey Nuestro Señor y la Repùblica Francesa : firmado en Basilea a 22 de Julio de 1795

Mode of access: Internet.

A natural history of birds : the most of which have not hitherto been figured or described ... : containing de representations of thirty-nine birds ... sixteen cooper-plates, which the figures of many curious ... anmals ... : part IV /

Forma parte de la obra completa: "A natural history of uncommon birds, and of some other rare and undescribed animals ..."

Mémoires de chymie de M. C. W. Schéele /

Mode of access: Internet.

Select exercises for young proficients in the mathematicks ... /

Mode of access: Internet.

Farmacología chirúrgica ó Ciencia de medicamentos externos é internos para curar las enfermedades de cirugia : con un Tratado de farmacia relativo á la preparacion y composicion de los medicamentos /

Mode of access: Internet.

Xenophontos logos eis Agesilaon ton Basilea = Xenophontis de Agesilao rege oratio : Graeca recognovit, cum Codice Msto. Harleiano & omnibus ferè libris editis contulit, plurimis in locis emendavit, versionem latinam reformavit, observationibus fuis auxit & illustravit /

Mode of access: Internet.

Corpus Iuris Civilis Romani, in quo Institutiones, Digesta ad Codicem Florentinum emendata, codex item et novellae ... /

Mode of access: Internet.