bluuebunny/crossref_metadata_2025_split huggingface dataset:
Solid Phase Peptide Synthesis by Four Component Condensation: Peptide Formation on an Isocyano Polymer Support
Authors: Arshady Reza , Ugi Ivar 
Published: February 2015

Abstract
Coupling of various protected amino acids or small peptides on an isocyano polymer and in the presence of 1 -methyl-3-formylindole demonstrates the feasibility of peptide formation by four component condensation on a polymer support, and the final peptide is detached from the resin by 50% trifluoroacetic acid in aceto-nitrile at room temperature.
Verteilung und Valenz der Kationen in Spinellsystemen mit Eisen und Vanadium, III Röntgenographische und Mößbauer-spektroskopische Untersuchung des Spinellsystems ZnFeVO4-Fe3O4 / Distribution and Valence of the Cations in Spinel Systems with Iron and Vanadium, III X-ray Investigation and Mössbauer Spectra of the Spinel System ZnFeVO4-Fe3O4
Authors: Riedel Erwin , Anik Hümeyra , Dützmann Till 
Published: February 2015

Abstract
The spinel system Zni_zFe2:[Fei+2;Vi_I]04 has been prepared by heating mixtures of ZnFeV(>4 and Fe3Ü4 at 1000 °C. The lattice constants, the oxygen parameters and the Mössbauer parameters show that a transition from a nearly normal to an inverse distribu-tion of Fe(II) and Fe(III) exists.
Übergangsmetallbenz - in-Komplexe. Dynamisches Verhalten von [Ta(C6H5)4(C6H4)a(Li • OC4H10)3] / Transition Metal Benzyne Complexes. Fluxional Behaviour of [TA(C6H5)4(C6H4)2(Li·OC4H10)3]
Authors: Sarry Brigitte , Schaffernicht Rolf 
Published: February 2015

Abstract
Products of the reaction between MBr5 and PhLi are proved to be benzyne complexes [M(C6H5)4(CeH4)2(Li · OC4H10)n], (M = Nb, Ta, W). Analysis of the temperature dependent 1 H and 7 Li NMR Spectra of [Ta(C6H5)4(C6H4)2(Li·OC4H10)3] are interpreted on the basis of square antiprismatic/dodecahedral structure with facial C6H4 groups.
The 51V NMR Spectra of Some Oxo-, Peroxo-, Nitrosyl- and Hydroxylamidovanadium Complexes
Authors: Rehder Dieter , Wieghardt Karl 
Published: February 2015

Abstract
The 51V NMR spectra are recorded for 3 dinuclear complexes {VO(ONR2)2μ - O and 13 mononuclear vanadium (+ V) and (+III) chelate complexes of the general formula [VXYZ]q, where X = O2-, NO-; Y = O2-, O2
2-, R2NO-; and Z = picolinate-(pic), dipicolinate2- (dipic), nitrilo-tri(2-propanolate)3-, and o-phenanthroline (phen). Shielding of the 51V nucleus increases as O2- is replaced for NO-, and in the series (O2- + dipic) < (2 O2
2- + pic) < (R2NO- + dipic) < (2 H2NO- + phen) < (2 H2NO- + pic); Et2NO- < H(Me)NO- < H2NO-; and (dinuclear complexes) C5H10NO- < Bz2NO- < Et2NO- These trends are explained on the basis of variations of molecular parameters correlated to electronic and steric factors associated with the ligands. Line widths of the 51V NMR signals are discussed in terms of influences originating from variations of the electric field gradient and the molecular correlation time
4.5 -Dicyano-1.3.2λ3-diazaphospholat - ein anionisches, als Monomer stabiles 1.3.2-Diazaphosphol [1] / 4,5-Dicyano-1,3,2 λ3-diazaphospholate - an Anionic 1,3,2-Diazaphosphole, Stable as a Monomer [1]
Authors: Schmidpeter Alfred , Karaghiosoff Konstantin 
Published: February 2015

Abstract
Diamino-maleodinitrile and P(NMe2)3 condense at room temperature to the dimethyl -ammonium salt of the dicyano-1,3,2-diazaphosphole. Other products may result under different conditions. Mel methylates the ambivalent diazaphosphole anion at nitrogen.
Non-Statistical Label Distribution in Biosynthetic 13C Enriched Amino Acids
Authors: Bengsch E. , Grivet J.-Ph. 
Published: February 2015

Abstract
A combined 13C nuclear magnetic resonance and field desorption mass spectrometric investigation of algae grown on 13CO2 has shown that the isotopic enrichment of amino acids extracted therefrom is neither uniform nor statistical. The use of these two independent techniques allows a new, detailed and accurate insight into the label distribution resulting from biosynthesis. The observed deviations from the statistical abundances are systematic. A system for classifying each member of the complex ensemble of isotopic species has been devised, so that the isotopomers may be ordered according to their relative probability of occurrence.
Studies on Vitamin B12 and Related Compounds, 54 Synthesis of 2-Hydroxyethylcobalamin from Ethylene and Vitamin B12r under "Oxidizing-Reducing" Conditions
Authors: Schrauzer G. N. , Grate Jay W. , Maihub Abdussalam , Xu Hui Bi 
Published: February 2015

Abstract
Reaction of ethylene with hydroxyl radicals under reducing conditions produces radicals which are trapped by Vitamin Bi2r, yielding 2-hydroxyethylcobalamin. Vitamin B12,
Difluorooxoschwefelimidato-metallate, [Ag(NSOF2)2]- und [M(NSOF2)4
2-, (M = Cu, Zn, Mn) / Difluorooxosulfurimidato-metallates, [Ag(NSOF2)2]- and [M(NSOF2)4]2- (M = Cu, Zn, Mn)
Authors: Eisenbarth Rainer , Sundermeyer Wolfgang 
Published: February 2015

Abstract
Difluorooxosulfurimidato-metallates, [Ag(NSOF2)2]- and [M(NSOF2)4]2-, (M = Cu, Zn, Mn), could be obtained by reaction of AgNSOF2 with (C6H5)4AsNSOF2 and the tetrabromo complexes [(CeH5)4P]2MBr4, respectively
Kristallstruktur und spektroskopische Untersuchungen von Dithiomalonsäurediamid H2C(CS-NH2)2: Ein Beispiel für eine Helixstruktur / Crystal Structure and Spectroscopic Investigations of H2C(CS-NH2)2: An Example for an Helix Structure
Authors: Hlawatschek Hartmut , Kiel Gertrud , Gattow Gerhard 
Published: February 2015

Abstract
The crystal structure of dithiomalonediamide (H2C(CS-NH2)2) has been determined. The compound crystallizes in the orthorhombic space group P2nn, No. 34, with a = 4.354(3), b = 7.940(5) and c = 8.458(5) Å. The molecules are connected by S ··· H bridges to form helices along the crystallographic a axes.
Synthese von 1-Aminoalkanphosphonsäuren via Benzhydrylschiffbasen / Synthesis of 1-Aminoalkane Phosphonic Acids via Benzhydrylic Schiff Bases
Authors: Issleib Kurt , Döpfer Klaus-Peter , Balszuweit Arno 
Published: February 2015

Abstract
A simple synthesis of 1-aminoalkanephosphonic acids is described. The addition of diethylphosphite to alkylidene-and arylidenebenzhydrylamines yields the N-benzhydryl-1-aminoalkanphosphonic acid esters. The title compounds are formed by treatment of the N-blocked esters with hydrobromic acid. The starting amine can be recycled from the hydrylbromide.
Na6[Au2O6] - ein „Insel-Aurat" / Na6[Au2O6] - a "Soro-Aurate"
Authors: Klassen Horst , Hoppe Rudolf 
Published: February 2015

Abstract
Na6[Au2O6] crystallizes tetragonally with a = 9.465(1) Å, c = 4.506(1) Å, Z = 2; space group P42/mnm. The crystal structure shows planar [Au2O6]-groups systematically shifted by a/2 · √2̄ along [110], twisted relative to each other by 90°, and stacked along [001].
Effective Coordination Numbers, ECoN, and the Madelung-Part of Lattice Energy, MAPLE, have been calculated and are discussed.
On the Reactions of CF3SF4Cl, (CF3)2SF2, SF4, and OSCl2 with Trimethylsilyl Cyanide
Authors: Kumar Ramesh C. , Shreeve Jean′ne M. 
Published: February 2015

Abstract
A moderately stable hexacoordinated sulfur(VI) compound with four different kinds of ligands, CF3SF2(CN)2Cl, results when CF3SF4Cl is reacted with (CH3)3SiCN. The latter compound also gives F2S(CN)2 and (CF3)2S(CN)2 with SF4 and (CF3)2SF2, respectively. These tetracoordinated suifur(IV) compounds decompose rapidly at 25 °C but are stable at lower temperatures. With OSCl2 and SCl2, the white solids OS(CN)2 and S(CN)2 result. This provides a new, convenient route to S(CN)2.
Synthese und Eigenschaften von Alkyloxi-und Aryloxi-substituierten Trithiadiborolanen / Synthesis and Properties of Alkoxi and Aryloxi Substituted Trithiadiborolanes
Authors: Schmidt Max , Sametschek Erich 
Published: February 2015

Abstract
The first examples of the hitherto unknown 1,2,4-Trithia-3,5-diborolanes with B-O-C-bonds have been synthesized and characterised. The diiodo substituted ring (2) reacts with 2,6-dimethylphenol, to form 3,5-bis-(2,6-dimethylphenyloxi)-1,2,4-trithia-3,5-di-borolane (3) and HI. 3,5-Diethoxi-1,2,4-trithia-3,5-diborolane, 5, and C2H5I are formed via the cleavage of diethylether by 2. From 2 and diisopropylether, the corresponding 3,5-diisopropyloxi-1,2,4-trithia-3,5-diborolane (6) is formed. The unsymmetrical ethers methyl-t-butylether and methylphenylether undergo reactions with 2 resulting in the formation of 3,5-dimethyloxi-1,2,4-trithia-3,5-diborolane (8) (besides t-C4H9I) and 3,5-diphenyloxi-1,2,4-trithia-3,5-diborolane (10) (besides CH3I). The thermal stability of the new compounds is increasing with increasing size of R in the -OR group and from aliphatic to aromatic R in this group.
IR, Raman, 1H NMR and 11B NMR spectra of the compounds are reported as well as some physical and chemical properties.
Quantitative Synthesis of (C6H5)2AsF2+AsF6- and (C6H5)2AsF3 via Interaction of Benzene with Arsenic Pentafluoride
Authors: Tanzella Francis L. , Bartlett Neil 
Published: February 2015

Abstract
Benzene reacts quantitatively with AsF5 to give (C6H5)2AsF2 + AsF6-, the first reported aryl or alkyl fluoroarsonium(V) salt. This reacts quantitatively with CsF to give (C6H5)2AsF3 and CsAsF6. Interaction of (C6H5)2AsF3 with AsF5 reconstitutes the fluoroarsonium salt. Variable temperature 19F NMR studies show (C6H5)2AsF3 to be a rigid trigonal bipyramid, with the phenyl groups in equatorial positions.
Tl6X4S − ein neuer Chalkogenhalogenidtyp in Thalliumsulfid-Thalliumhalogenid-Systemen Tl6X4S − A New Chalcogeno Halide Type in Thallous Sulphide-Thallous Halide Systems
Authors: Blachnik R. , Dreisbach H. A. 
Published: February 2015

Abstract
Phase studies were performed in the system Tl2S + TlX (X = Cl, Br, I) and showed the existence of a new type of compound Tl6X4S in the quasibinary systems. In addition, in the iodide system a high temperature compound Tl3SI exists. The enthalpy of melting of Tl6I4S is given.
Tetrakis(trifluormethylthiyl)hydrazin − ein ungewöhnlich thermolabiles / Hydrazinderivat Tetrakis(trifluoromethylthiyl)hydrazin -an Unusually Thermolabile Hydrazine Derivative
Authors: Schlosser Karl 
Published: February 2015

[(CF3S)2N]2 (1) prepared by irradiation of (CF3S)3N underwent homolytic N−N-bond dissociation below room temperature to give (CF3S)2N-radicals, which were identified by ESR.
The easy N−N-bond cleavage is ascribed to steric strain in 1 and electronic stabilization of 2.
1.2λ3.3λ3-Azadiphosphiridine − Synthese, Kristallstruktur und Eigenschaften / 1,2λ3,3λ3-Azadiphosphiridines − Synthesis, Crystal Structure and Proj)erties
Authors: Niecke Edgar , Nickloweit-Lüke Anke , Rüger Reinhold 
Published: February 2015

Abstract
1,2λ3,3λ3-Azadiphosphiridines are available by elimination of hydrogenhalide from β-and γ-functional molecular frameworks and by 1+2 cycloaddition of phosphinidenes towards aminoiminophosphanes. In contrast to other three-membered phosphorus compounds, azadiphosphiridines decompose by 2+1 cycloreversion to aminoiminophosphanes and phosphinidenes. The molecular structure of an azadiphosphiridine demonstrates the trans arrangement of the exocyclic ligands and the planarity of the endocyclic nitrogen.
Übergangsmetall-Garben-Komplexe, CXXI [1] Fluorcarbenkomplexe des Mangans / Transition Metal Carbene Complexes, CXXI [1] Fluorocarbene Complexes of Manganese
Authors: Aus dem Anorganisch-chemischen Institut der Technischen Univ Ernst Otto , Kleine Willi , Schambeck Werner , Schubert Ulrich 
Published: February 2015

Abstract
The reaction between CH3Cs5H4Mn(CO)3 and LiN(C2H5)2 and subsequent alkylation with [(C2H5)3O]BF4 affords CH3C5H4(CO)2MnC(OC2H5)N(C2H5)2. This carbene complex reacts with borontrihalides BX3 (X = F, Cl) to yield [CH3C5H4(CO)2MnCN(C2H5)2]BX4. Ad-dition of [(C4H9)4N]F to this cationic carbyne complex results in the formation of CH3C5H4(CO)2MnC(F)N(C2H5)2 . In the same way C5H5(CO)2MnC(F)C6H5 is prepared from [C5H5(CO)2MnCC6H5]SbCl6. Fluoride addition can be reversed by reaction of the latter carbene complex with BF3 to give [C5H5(CO)2MnCC6H5]BF4. In the X-ray structure of C5H5(CO)2MnC(F)C6H5 unusual bonding parameters are found, which are consistent with the easy cleavage of the C(carbene)-F bond.
Molecular Complexes, V [1, 2] 1H NMR Investigation of the Caffeine Benzene Complex Followed by AUS Correction of Experimental Data Structural Requirements for Substances to Serve as Internal Reference in Investigations of Weak Complexes
Authors: Stamm Helmut , Stafe Jürgen 
Published: February 2015

Abstract
The 4 proton signals of caffeine, dissolved in carbon tetrachloride, were investigated as functions of benzene concentrations in a very large concentration range. Shifts of the 4 signals were measured relative to both internal and external reference. Scatchard plots of the internally referenced data were curved downwards, the degree of curving increasing from 7-methyl/8-H to 3-methyl to 1-methyl. The 1-methyl plot even showed a maximum in the observed relative shifts ⊿oi which turned to negative values for high benzene concentrations. Scatchard plots of the externally referenced data were curved upwards.
Applying AUS corrections [1, 8] to both sets of data furnished linear Scatchard plots for ah signals. The plots for the 4 protons were parallel to one another in case of the externally referenced data and not parallel for the internally referenced data. Equilibrium quotients K calculated from the externally referenced data for each of the 4 different protons were essentially the same. This gives evidence that the system behaves in accord with the pure 1:1 complex model and does not demand the assumption of simultaneous occurence of higher complexes. The values for K (= .115 l/mol), for the 4 apparent complex shifts (Icpt/K) and for the 4 nuclei specific AUS coefficients a 2 [1, 8] could be confirmed and somewhat improved by a Creswell-Allred processing of the data including AUS correction.
The failure of the AUS correction in producing parallel Scatchard plots from internally referenced shifts is caused by the nonlinear floating with the donor concentration of the internal reference signal. The cause of this nonlinear behaviour is analyzed, and arguments are presented that it can be prevented by use of reference substances with only one single reference group per molecule, i.e. the signal of such an internal reference must not have its origin in two or more equivalent nuclei groups within the reference molecule.
Pyridin-4-on-Nueleosid+: Stabilisierung der Struktur im Kristall und in wäßriger Lösung / Pyridine-4-on Nucleoside: Stabilisation of the Structure in the Crystal and in Aqueous Solution
Authors: Kaiser Peter M. , Nesper Reinhard , Tebbe Karl-Friedrich , Witzel Herbert 
Published: February 2015

Abstract
C10H13NO5 • H2O is monoclinic, space group P2i with a = 773.7 pm, b = 814.6 pm, c= 932.6 pm, β = 109.36° at 143 K, Z = 2. The crystal structure has been refined to R =0.031 with 1340 counter reflections. Features of this nucleoside include an orientation of the base at the glycosidic bond N(l)-C(l') in the anii-range (52.5°), a ribosyl moiety in the C(2')-endo(S) conformation and in contrast to many other nucleosides a trans arrange-ment at C(4')-C(5'). This unusual conformation is stabilized by a distinct H-bonding scheme including the water molecule and the oxygen of the adjacent pyridin-4-on ring system. NMR data indicate on the other side that in solution the conformation of the nucleoside is anti/g + similar to that of other pyrimidine nucleosides. The 5'-OH group replaces the water molecule in the crystal. The preferred anti position of the base cannot be explained by an interaction of H(2,6) of the base with the 5'-OH group or the C(4) oxygen. Both protons which couple with H(3,5) coalesce in a single sharp doublet. Water entropy seems to be the decisive factor for the stabilization of the anti/g+ conformation in aqueous solution.
3,3-Dimethyl-4 [2-methyl-1-propenyl] -1,2-dioxetane: Its Thermal Stability and Chemiluminescent Properties
Authors: Adam Waldemar , Cueto Omar 
Published: February 2015

Abstract
The alkenyl-substituted 1,2-dioxetane (1) was prepared by photosensitized singlet oxygenation of 2,5-dimethyl-2,4-hexadiene and its activation and excitation parameters determined. It is shown that dioxetane (1) is comparable in its thermal stability to alkyl-substituted dioxetanes and an inefficient chemical source of electronic excitation.
Die Photoaddition von Bromtrichlormethan an Acroleindiethylacetal und die Synthese von 4.4.4-Trichlor-⊿2 -butenal / The Photoaddition of Bromotrichloromethane to Acroleindiethylacetal and the Synthesis of 4,4,4-Trichloro-2-butenal
Authors: Seidel Peter , Ugi Ivar 
Published: February 2015

Abstract
The preparation of 4,4,4-trichloro-⊿2 -butenal by photoaddition of bromotrichloro-methane to acroleindiethylacetal, subsequent elimination of hydrogen bromide by DBN, and then acidolysis of the acetal by TFA is described.
Kristallstruktur der stabilen Modifikation von SeCl4 / Crystal Structure of the Stable Modification of SeCl4
Authors: Kniep Rüdiger , Körte Lutz , Mootz Dietrich 
Published: February 2015

Abstract
Single crystals of the stable modification of selenium tetrachloride (α-SeCl4) were grown by sublimation, and the crystal structure was determined. As that of metastable β-SeCl4 it contains tetrameric cubane-like molecules Se4Cl4, but with different point symmetry and in positions which correspond to those of the atoms of the β-tungsten structure type.
K2PdP2 und K2PtAs2, zwei weitere Verbindungen mit MP2(As2)-Kettenstruktur / K2PdP2 and K2PtAs2, two Further Compounds with a MP2(As2)-Chain-Structure
Authors: Rózsa Sándor , Schuster Hans-Uwe 
Published: February 2015

Abstract
K2PdP2 and K2PtAs2 were prepared from the elements. They are isotypic with K2PdAs2 [1] and crystallize orthorhombically, space group Cmcm, with the following constants:
K2PdP2: a = 635.5 pm, b= 1389.8 pm, c = 590.0 pm.
K2PtAs2 :a = 646.5 pm, b= 1410.6 pm, c = 609.6 pm.
Eine Untersuchung über die Energie-Übertragung bei der triplett-sensibilisierten Photo-Isomerisierung der 6-endo- und 6-exo-alkylsubstituierten Tetramethylhomofulvene / An Energy Transfer Study of the Triplet Sensitized Photo-Isomerizations of 6-endo- and 6-exo-Alkyl-Substituted Tetramethylhomofulvenes
Authors: Brune Hans Albert , Lach Peter 
Published: February 2015

Abstract
The isomerizations following triplet sensitized excitations of three diastereomeric pairs of 6-endo-and 6-exo-alkyl substituted 1,2,3,5-Tetramethyl-4-methylenebicyclo[3.1.0]hex-2-enes have been studied with respect to the influence of the steric conditions during triplet energy transfer on the equilibrium constant of the photo-stationary equilibrium.
Aliphatische Flüssigkristalle, IV [1] Synthese einiger 1-(1,3-Dioxan-2- und -5-yl)piperidine / Aliphatic Liquid Crystals, IV [1] Synthesis of Some 1-(1.3-Dioxan-2- and -5-yl)Piperidines
Authors: Sucrow Wolfgang , Lüschen Ronald , Risse Annette 
Published: February 2015

b , 2
The preparation of the title compounds 1and 12 is described. Their configurations are deduced from the NMR spectra. trans-4-Pentyl-1-(trans-2-pentyl-1,3-dioxan-5-yl)piperidine (2) exhibits a broad smectic B phase.
PERCEPCIÓN DE LOS NIÑOS (AS) DE 7 A 12 AÑOS ACERCA DE LAS DROGAS EN AMÉRICA LATINA
Authors: Fernandes Moll Marciana , Sánchez Charpentier Olga 
Published: February 2015

Introducción. El presente artículo tiene como objetivo analizar la percepción de los niños de 7 a12 años acerca de la temática de las drogas, durante el periodo 1992-2012. uno de los problemas más reiterativos en las poblaciones infantiles es el uso del alcohol, tabaco y demás drogas ilícitas, cuya exposición inicia a edades cada vez más tempranas, motivo por el que es fundamental la participación de equipos de trabajo en conjunto con padres, educadores, psicólogos, psiquiatras, trabajadores sociales, poderes públicos, a lo que debe aunarse una estrategia global de promoción de la salud para enfrentar el fenómeno de las drogas en la niñez.Métodos. Para desarrollar esta investigación se empleó la revisión bibliográfica integrativa. Para recolectar información se utilizó diversos artículos completos, indexados en bases de datos LILACS y SCIELO, de los que se recuperó 54 artículos, aunque solo diez se relacionan con la temática en estudio.Resultados. En ninguno de los estudios se estableció diferencia de percepción entre los niños (as) a partir de aspectos como sexo, edad, condiciones económicas, sociales y familiares; no obstante, se relaciona países, sí se detectó diferencias, aunque mínimas, principalmente en lo que respecta al abordaje del tema, el cual se enfoca en el consumo en sí y no en las percepciones que construyen los niños en relación con el consumoConclusión. Los niños perciben como inapropiado el consumo de drogas tanto lícitas como ilícitas, puesto que producen múltiples consecuencias que producen alteraciones en la salud y en la apariencia física, así como bajo rendimiento escolar y deterioro en las relaciones familiares y sociales.
Las necesidades de las adolescentes madres en el contexto educativo: un estudio de caso en una institución de educación pública
Authors: Martínez Esquivel Daniel , Chaves Guillén Jennifer , Guzmán Rojas María Jacinta , Martínez López Luis , Meneses Damian , Mora Martínez Rebeca , Quesada Mora Nazira , Vargas Quesada Sofía 
Published: February 2015

Introducción. El embarazo en la adolescencia es un problema de salud pública que debe ser subsanado en las generaciones presentes a partir de la educación en salud. La Enfermería no debe mostrarse ajena a este proceso, sino que debe ser sensible a las necesidades tanto de las adolescentes en riesgo como de las adolescentes embarazadas, motivo por el que en esta investigación se planteó como pregunta ¿cuáles son las necesidades surgidas en el ámbito educativo en las adolescentes embarazadas?Método. Se diseñó un estudio cualitativo, fenomenológico. Los datos fueron recolectados mediante la técnica de grupo focal en el que participaron tres adolescentes madres. El análisis se realizó desde una perspectiva interpretativa.Resultados. Los principales resultados evidenciaron necesidades personales como uniformes que se ajusten a sus cambios físicos, necesidades de infraestructura como sillas y pupitres adecuados, un espacio específico para la lactancia, tiempo para ver a su hijo o hija y adecuación de los horarios de clase.Conclusión. Se concluye que la implementación de las políticas públicas favorecerá el respeto de los derechos de las adolescentes madres en aspectos personales, académicos y de infraestructura.
Surgimiento de la Escuela de Obstetricia en el mapa social de Costa Rica: finales del siglo XIX y principios del XX
Authors: Martínez Esquivel Daniel , Meza Benavides María De los Ángeles 
Published: February 2015

Introducción. El presente artículo muestra los resultados preliminares que forman parte de la investigación “Funciones sociales de la Enfermería en los diversos procesos históricos desde la construcción de la Salud Pública en la Costa Rica contemporánea”, cuyo propósito es analizar los hechos sociales e históricos que favorecieron la profesionalización de la Enfermería, en un primer momento, con la fundación de la Escuela de Obstetricia en 1897.Materiales y método: Este artículo responde a una investigación histórica basada en tres pasos: la revisión de fuentes primarias como la Gaceta Médica y los informes de la Junta de Caridad, y fuentes secundarias; la evaluación crítica de los datos; y la interpretación y conclusiones de los hechos.Resultados: Los hechos que favorecieron la fundación de la Escuela de Obstetricia se relacionaron con la creciente tasa de mortalidad infantil, la necesidad de institucionalizar las prácticas sanitarias e higienizar a la población para construir un Estado fuerte que promoviera el desarrollo económico, así como con la lucha que emprendió la institución médica contra las prácticas populares de atención de salud.Conclusión. Se concluye que la represión de la curandería y la partería estuvo relacionada con el poder patriarcal. Además, la fundación de la Escuela de Obstetricia se relacionó a las condiciones sociales, políticas y económicas de la época basadas en la línea de desarrollo que estaba teniendo el país