bluuebunny/crossref_metadata_2025_split huggingface dataset:
IR‐Spektren 15N‐isotopenmarkierter Nitrido‐, Chlorthionitreno‐ und Cyclothiazeno‐Komplexe von Molybdän, Wolfram und Rhenium
Authors: Dietrich Armin , Dehnicke Kurt 
Published: April 2007

AbstractIR Spectra of 15N Labelled Nitrido, Chlorothionitreno and Cyclothiazeno Complexes of Molybdenum, Tungsten and RheniumThe IR spectra of selected, 15N labelled complexes of molybdenum, tungsten, and rhenium with metal‐nitrogen multiple bonds are reported. The examined compounds include nitrido complexes (I), chlorothionitreno complexes (II), and cyclo‐thiazeno complexes (III): The results of IR spectroscopy allow reliable assignments of characteristic vibrational modes for the types I and II, whereas the assignments of vibrational modes of compounds of type III are influenced by MN3S2 ring vibrations.
Synthese, Kristallstruktur und quantenchemische Untersuchung des phosphanstabilisierten Nickel‐Schwefel Clusters [Ni32S24(PPh3)10]
Authors: Koenig Sven , Eichhöfer Andreas , Crawford Nathan R. M. , Ahlrichs Reinhart , Fenske Dieter 
Published: April 2007

AbstractSynthesis, Crystal Structure and Quantum Chemical Investigation of the Phosphine‐stabilized Ni–S‐Cluster [Ni32S24(PPh3)10]The reaction of iPrSSiMe3 and S(SiMe3)2 with [NiCl2(PPh3)2] in THF results in crystals of [Ni32S24(PPh3)10]·6THF (1). The structure of this compound was determined by single crystal X‐ray structural analysis. Since the crystallographic analysis for [Ni32S24(PPh3)10] remained ambiguous with respect of the assignment of the disordered Ni‐ and S‐atoms in the centre of the cluster, we performed DFT computations to address this problem. The theoretical investigations support the composition of the new sulfur‐bridged nickel cluster compound [Ni32S24(PPh3)10]. We report herein the synthesis, structure and theoretical investigation of [Ni32S24(PPh3)10]. In addition we comment on the analogous selenium compound.
Structural Evidences for the Oxidation of α‐Hydroxycarboxilic Acids to Oxalate Assisted by Copper(II) Ions
Authors: Castiñeiras Alfonso , Balboa Susana , Carballo Rosa , González‐Pérez Josefa María , Niclós‐Gutiérrez Juan 
Published: April 2007

AbstractThe mono‐, di‐ or poly‐nuclear copper(II)‐oxalate complexes [Cu(phen)(ox)(H2O)]·H2O (1), {[Cu(μ‐ox)(bpy)]·H2O· 1/2EtOH}n (2), {[Cu(μ‐ox)(bpy)]·2H2O}n (3), [{Cu(NO3)(bpy)(H2O)}2(μ‐ox)] (4) and [{Cu(NO3)(phen)(H2O)}2(μ‐ox)] (5) (ox = oxalato, phen = 1,10‐phenanthroline y bpy = 2,2′‐bipyridine) were prepared by reacting Cu2CO3(OH)2·2H2O or Cu(NO3)2·3H2O salts with glycolic (H2GLYO) or lactic (H2LACO) acids or D‐gluconic acid δ‐lactone (δ‐gluconolactone, H2δ‐Glc) in presence of diimine ancillary ligands. Their crystal structures are reported. The copper(II) atom exhibits a 4+1 five‐coordinate CuN2O2O′ environment in 1, a 4+2 elongated rhombic octahedral CuN2O2O′2 stereochemistry in 2 or 3, and a 4+1+1 tetragonally elongated octahedral Cu2N2O2O′O″ surrounding in 4 or 5. The ligand arrangement and the packing of 5 seem to be strongly influenced by intra‐ and inter‐molecular hydrogen bonding as well as π,π‐stacking interactions between C6‐rings from adjacent phen ligands. The most striking feature now reported is the CuII‐mediated oxidation of GLYO2−, LACO2&&minus;; or δ‐Glc2&&minus;; leading to the formation of corresponding CuII‐oxalate derivatives. For the glycolate case a mechanism involving a cleavage of the α‐C‐H bonds is proposed, whereas for lactate or D‐gluconate related systems an oxidative degradation through C‐C bond cleavage are assumed.
Phosphanimin‐Derivate des Osmium(IV): Kristallstrukturen von trans‐[OsCl4(HNPEt3)2] und (H2NPPh3)2[OsCl6]·2CH3CN
Authors: Neumüller Bernhard , Dehnicke Kurt 
Published: April 2007

AbstractPhosphoraneimine Derivatives of Osmium(IV): Crystal Structures of trans‐[OsCl4(HNPEt3)2] and (H2NPPh3)2[OsCl6]·2CH3CNtrans‐[OsCl4(HNPEt3)2] (1) was prepared by reaction of osmium pentachloride with the silylated phosphoraneimine Me3SiNPEt3 in dichloromethane solution forming yellow moisture sensitive single crystals. The hexachloroosmate(IV) (H2NPPh3)2[OsCl6]·2CH3CN (2) was obtained as yellow single crystals from osmium pentachloride and N‐chlorotriphenylphosphoraneimine, ClNPPh3, in acetonitrile solution. 1 and 2 are characterized by IR spectroscopy and single crystal X‐ray structure determinations.1: Space group P21/c, Z = 2, lattice dimensions at 193 K: a = 830.9(1), b = 1031.1(1), c = 1307.7(1) pm, β = 106.15(1)°, R1 = 0.0248. 1 forms centrosymmetric molecules with distances Os–N of 202.9(4) pm and Os–Cl of 234.7 pm on average.2: Space group ${\rm P}{\bar 1}$, Z = 2, lattice dimensions at 193 K: a = 1030.7(1), b = 1432.6(1), c = 1448.8(1) pm, α = 90.98(1)°, β = 92.40(1)°, γ = 92.98(1)°, R1= 0.0545. 2 forms an ionic structure with (H2NPPh3)+ cations and two different site positions of the centrosymmetric [OsCl6]2− anions. The cations are connected with one of the anions by N‐H···Cl bridges as well as with the solvate molecules CH3CN by N–H···N bridges.
Supramolecular Architecture of a Copper(II) Complex with Lactato and 2,2′‐Dipyridylamine Showing Embedded Water Chains
Authors: Carballo Rosa , Castiñeiras Alfonso , Covelo Berta , Lago Ana B. , Vázquez López Ezequiel M. 
Published: April 2007

AbstractA new mixed‐ligand complex [CuL2(dipyam)]·3H2O (1) (L = lactato and dipyam = 2,2′‐dipyridylamine) has been prepared and structurally characterized by X‐ray diffraction. The presence of three crystallization water molecules creates several hydrogen‐bonded networks. Two crystallographic unique crystallization water molecules are arranged into infinite one‐dimensional chains embedded by additional hydrogen bonds between stacked complex double‐chains, but the third crystallization water molecule is apart from the chain and acts as bridge to form centrosymmetric complex tetramers.
3‐D Supramolecular Arrangement of [K(O2NC6H4NNNC6H4NO2)]2 through K···O Secondary Bonding – Synthesis and Crystal Structure Analysis of a 1,3‐Diaryl Symmetric‐substituted Triazenide Complex Polymer of Potassium
Authors: Hörner Manfredo , Marques da Silva Aline , Fenner Herton 
Published: April 2007

AbstractA solution of 1,3‐(4‐nitrophenyl)triazenein methanol treated with potassium hydroxide yields dark‐red crystalline blocks of {[K(O2NC6H4NNNC6H4NO2)]2}n, a triazenide complex polymer of potassium. The centrosymmetric binuclear entities are connected by weak intermolecular K···O interactions, and are related to chains by translation along the [010] crystallographic direction. Additional weak secondary K···O interactions give raise to a 3–D supramolecular arrangement.
[Ga19R6]− (R = C(SiMe3)3: A Structurally Characterized Metalloid Cluster Ion and its Stepwise Chlorination in the Gas Phase – a Model Reaction for the Oxidation of Metal‐Nanoparticles?
Authors: Koch Katharina , Schnöckel Hansgeorg 
Published: April 2007

AbstractThe title compound and its fragments after the collision activated dissociation are investigated under mass spectrometric conditions (FT‐ICR) in order to detect intermediates during the subsequent reaction with a large excess of Cl2. All fragments perform similar reactions: the elimination of two molecules GaCl, e. g. [Ga13(GaR)4]− + Cl2 → [Ga11(GaR)4]− + 2 GaCl like a mechanism recently described for the chlorination of [Al13]− clusters. In contrast, the parent ion [Ga13(GaR)6]− exhibits a completely different sequence: only one GaCl is eliminated and the other Cl atom of each reacting Cl2 molecule stabilizes the cluster surface: e.g. [Ga13(GaR)6]− + Cl2 → [Ga12(GaClR)(GaR)6]− + GaCl. Finally, [Ga12R6Cl6]− results. Surprisingly, this cluster ion does not obey the Wade rule (with an icosahedral Ga12 core); instead an isomer is formed containing an octahedral Ga6 entity which is surrounded by a protecting (GaRCl)6 surface. This unexpected result is casting a light on the mechanism of every oxidation process of metal clusters, nanoparticles, and metal surfaces. Furthermore it provides a challenge to investigate the limits of Wade's rules.
The Persistence of the HgCl2 Molecule in Five New Compounds in the System (NH4)wHgxCly(H2O)z with w:x:y:z = 1:5:11:0, 2:3:8:1, 4:3:10:2, 2:1:4:1, and 10:3:16:0
Authors: Nockemann Peter , Pantenburg Ingo , Meyer Gerd 
Published: April 2007

AbstractFive new compounds in the system (NH4)Cl/HgCl2/H2O have been obtained as colourless single crystals, (NH4)Hg5Cl11, (NH4)2Hg3Cl8(H2O), (NH4)4Hg3Cl10(H2O)2, (NH4)2HgCl4(H2O), and (NH4)10Hg3Cl16. In all of these, as in HgCl2 itself, (almost) linear HgCl2 molecules persist with Hg‐Cl distances varying from 229 to 236 pm. In (NH4)10Hg3Cl16 there are also tetrahedra [HgCl4] with d(Hg‐Cl) = 247 pm present. If larger Hg‐Cl distances (of up to 340 pm) are considered as belonging to the coordination sphere of HgII, the structures may be described as consisting of isolated octahedra and tetrahedra as in (NH4)10Hg3Cl16, edge‐connected chains as in (NH4)2HgCl4(H2O), edge‐connected chains and layers of octahedra as in (NH4)4Hg3Cl10(H2O)2, corrugated layers of edge‐connected octahedra as in (NH4)2Hg3Cl8(H2O), and, finally, a three‐dimensional network of connected six‐ and seven‐coordinate Hg‐Cl polyhedra as in (NH4)Hg5Cl11. The water molecules are never attached to HgII. The (NH4)+ cations, and sometimes Cl− anions, play a role for electroneutrality only.
Differential Expressions of Cyclin D1 Associated with Better Prognosis of Cancers of Ampulla of Vater
Authors: Chang Ming‐Chug , Chang Yu‐Ting , Sun Chia‐Tung , Chiu Yen‐Feng , Lin Jaw‐Town , Tien Yu‐Wen 
Published: April 2007

AbstractBackgroundPeriampullary cancers, the incidence of which increases gradually with industrialization, still pose a significant challenge to clinicians and researchers. Specifically, the role of cell‐cycle proteins and tumor suppressor genes in these cancers is not yet clear. Recent studies have revealed that genes and proteins related to cell cycle and apoptosis regulation may be involved in pancreatic carcinogenesis.MethodsTissue samples were obtained from patients with periampullary cancers who underwent surgery at the National Taiwan University Hospital without receiving previous chemotherapy or radiation therapy. All periampullary cancer tissue samples were examined by a pathologist, who was unaware of the parameters to be investigated. A total of 68 patients with periampullary cancers (29 ampulla of Vater cancers (AVCs) and 39 pancreatic ductal cancers (PDCs), including various stages and histological subtypes, were enrolled. The relevant demographic and clinicopathological information was obtained from medical records.ResultsCell‐cycle proteins, including p16, Rb, cyclin D1, p53, and E2F1, were analyzed by immunohistochemical staining. Here, significant differences were noted between AVCs and PDCs with regard to the expression of cyclin D1. This corresponded to a poor prognosis in PDCs (P < 0.05); AVCs, on the other hand, showed a relatively high survival rate. There is no obvious statistical difference between the 2 groups with regard to the expression of p16, Rb, p53, and E2F1. The study also revealed that cyclin D1 plays different roles in the carcinogenesis of AVCs and PDCs.ConclusionsThe expression of cyclin D1 is more often correlated with prognosis in AVCs than in PDCs, and may serve as a biomarker for the disease.
Neurectomy to Prevent Persistent Pain after Inguinal Herniorraphy: A Prospective Study Using Objective Criteria to Assess Pain
Authors: Pappalardo Giuseppe , Frattaroli Fabrizio Maria , Mongardini Massimo , Salvi Pier Federico , Lombardi Augusto , Conte Anna Maria , Arezzo Maria Felice 
Published: April 2007

AbstractBackgroundAlthough tension‐free mesh repair has markedly improved the outcome of inguinal hernia surgery, it has only minimally reduced the incidence of persistent postoperative pain. The pathogenesis of this complication and treatment remain unclear.Study designIn order to objectively assess whether iliohypogastric neurectomy reduces the incidence and intensity of persistent postoperative pain, we prospectively studied 100 male patients with bilateral inguinal hernia who underwent tension‐free surgical repair, combined with iliohypogastric neurectomy on the right side alone. Pain was evaluated postoperatively on days 1 and 7 and at 1 and 2 years by means of a visual analog scale. Patients were given a questionnaire including coded terms for describing pain. These terms were designed to compare pain on the neurectomized and non‐neurectomized sides and assess altered sensation (hypoesthesia and paresthesia) on both sides.ResultsThere were differences in the incidence and intensity of pain between the neurectomized and non‐neurectomized sides, though these differences were not significant. Individual patient assessment showed that from postoperative day 7 onward patients had on average less pain on the neurectomized side.Pain reduction was more prominent in patients who scored 4 or more on the visual analog scale. No significant difference was found in the incidence of sensory alterations between the two sides. Two years after inguinal hernia repair, only one of the 100 patients studied still had persistent pain (>4 on the visual analog scale); this pain was on the non‐neurectomized side.ConclusionsOur prospective data do not reach statistical significance to claim that iliohypogastric neurectomy reduces the incidence and intensity of persistent postoperative pain after tension‐free inguinal hernioplasty. Studies on larger patient samples are warranted to provide definitive, statistically supported conclusions.
Gene expression profiling of human lymph node metastases and matched primary breast carcinomas: Clinical implications
Authors: Suzuki Mika , Tarin David 
Published: April 2007

AbstractThe genetic program that drives tumor metastasis and the mode and timing of its initiation are of great practical significance to clinical management. Modern technical advances open new opportunities for gaining useful relevant information. Gene expression profiles of histologically‐verified viable tissue from lymph node metastases were compared with those of matched primary breast cancers from 10 different patients, among samples from over 400 cases, using high‐throughput oligonucleotide arrays comprising probes for 22,000 genes. It was observed that metastases have very similar expression signatures to their parent tumors. However, detailed computational analysis revealed that a small number of genes were consistently differentially expressed between 100% of tumors and metastases, suggesting that these are mechanistically important. Lists of such candidate genes, of potential clinical interest, are provided. We interpret these results in the framework of a meta‐analysis of previous investigations by others and ourselves and of existing clinical knowledge on the behavior of human tumors. The collective data show that metastases resemble their primary tumors but the signatures obtained in different studies are not sufficiently reproducible or informative to be prognostically useful, although they do give valuable insights into the pathogenesis and biology of human tumor metastasis. The findings indicate that the genetic program encoding metastasis is implemented progressively over time although, occasionally, this evolution can occur rapidly, early in the life of the neoplasm. The important clinical significance of this deduction is that, in most patients, early detection provides time for appropriate therapeutic intervention to be effective in obstructing metastasis.
Estimation of human daily boron exposure in a boron-rich area
Authors: Korkmaz Mehmet , Şaylı Uğur , Şaylı Bekir Sıtkı , Bakırdere Sezgin , Titretir Serap , Yavuz Ataman Osman , Keskin Sıddık 
Published: April 2007

Although, the safe limits of human daily boron (B) exposure are not absolutely clear, there is a growing interest in B and its effects on human health. The aim of the present study was to estimate daily B exposure in 66 males in Turkey living in a B-rich area using water containing at least 2 mg/l boron, with an average age of 38·55 (se 1·66) years and an average number of years of residence in the B-rich area of 35·89 (se 1·73). Another group of males (n 57), living in the city centres of Balıkesir and Ankara, were taken as controls; the average age and number of years of residence for this group were 29·44 (se 1·43) and 10·26 (se 1·83) years, respectively. As it is assumed that the B level in urine reflects daily B exposure, the amount of urinary B of both the study and control groups was analysed by using an inductively coupled plasma optical emission spectrometry (ICP-OES) technique. The average daily B exposure value was calculated as 6·77 (se 0·47) mg in the study group and 1·26 (se 0·1) mg in the controls. The results of this study are expected to contribute to creating a reference value for a safe daily B exposure.
Consumption of fish and risk of colon cancer in the Norwegian Women and Cancer (NOWAC) study
Authors: Engeset Dagrun , Andersen Vegard , Hjartåker Anette , Lund Eiliv 
Published: April 2007

Recent studies have shown a decreased risk of colon cancer with consumption of fish. However, most studies on fish consumption do not distinguish between lean and fatty fish, or between poached and fried fish. The aim of this study was to investigate any association between fish consumption and colon cancer in The Norwegian Women and Cancer (NOWAC) study. We focused mainly on lean fish, which was further divided into poached and fried fish. A total of 63 914 women were included in the analysis, 254 of whom were found to have colon cancer during follow-up. Since fish consumption was one of the main topics of interest in the NOWAC study, there is a predominance of women from northern Norway due to higher fish intake in this area; hence the study is not representative of the whole of Norway. The participants completed a semi-quantitative FFQ between 1996 and 1999, and were followed-up for incidence of colon cancer until 2004. No association between fish consumption and risk of colon cancer was seen, except for the third tertile of poached lean fish consumption (relative risk (RR) 1·46, 95 % CI 1·04, 2·06). This association disappeared when excluding women with less than 1 year of follow-up. In conclusion, the present study does not support the hypothesis of a protective effect of fish against colon cancer risk.
Intranasal myopericytoma. A tumour with perivascular myoid differentiation: the changing nomenclature for haemangiopericytoma
Authors: Wilson T , Hellquist H B , Ray S , Pickles J 
Published: April 2007

AbstractWe present a case report of a patient who developed a sinonasal myopericytoma treated by surgical excision through a lateral rhinotomy. Some aggressive features on pre-operative computed tomography scanning and the complexity of recent changes in the histological nomenclature for these tumours led to consideration of adjuvant therapy. The close histological relationship between myopericytoma, myofibromatosis, solitary myofibroma and infantile haemangiopericytoma is discussed. This group of lesions constitute a single morphological spectrum with differentiation towards perivascular myoid cells (pericytes). Currently myopericytoma is the most appropriate and accepted term embracing all these entities. A review of the literature has been reassuring in identifying these tumours as benign but with a reasonably high rate of local recurrence (17 per cent). The treatment of choice is surgical excision with further excisions for local recurrence.
Non-injective representations of a closed surface group into PSL(2, )
Authors: FUNAR LOUIS , WOLFF MAXIME 
Published: April 2007

AbstractLet e denote the Euler class on the space ${\text{\rm Hom}(\Gamma_g,{PSL(2,{\mathbb R})}}$ of representations of the fundamental group Γg of the closed surface Σg of genus g. Goldman showed that the connected components of ${\text{\rm Hom}(\Gamma_g,{PSL(2,{\mathbb R})}}$ are precisely the inverse images e−1(k), for 2−2g≤ k≤ 2g−2, and that the components of Euler class 2−2g and 2g−2 consist of the injective representations whose image is a discrete subgroup of ${PSL(2,{\mathbb R})}$. We prove that non-faithful representations are dense in all the other components. We show that the image of a discrete representation essentially determines its Euler class. Moreover, we show that for every genus and possible corresponding Euler class, there exist discrete representations.
Real double-points of deformations of -simple map-germs from n to 2n
Authors: KLOTZ CARSTEN , POP OTILIA , RIEGER JOACHIM H. 
Published: April 2007

AbstractThe only stable singularities of a real map-germ $f:{\mathbb R} ^n\to{\mathbb R} ^{2n}$ are isolated transverse double-points. All ${{\cal A}}$-simple germs f have a deformation with the maximal number d(f) of real double-points (this is a partial generalization to higher n of the result of A'Campo [1] and Gusein-Zade [13] that all plane curve-germs have a deformation with δ real double points, with the extra hypothesis of ${{\cal A}}$-simplicity). The proof of this result is based on a classification of all ${{\cal A}}$-simple orbits.
Consumption of herbal remedies and dietary supplements amongst patients hospitalized in medical wards
Authors: Goldstein Lee H. , Elias Mazen , Ron‐Avraham Gilat , Biniaurishvili Ben Zion , Madjar Magali , Kamargash Irena , Braunstein Rony , Berkovitch Matitiahu , Golik Ahuva 
Published: April 2007

What is already known about this subject • In general, use of herbal remedies and supplements is constantly rising in the western population and this may be potentially dangerous due to adverse effects and drug–herb interactions.• All information up to now has been derived from the general population or outpatients.• There are no publications on the rate of consumption of herbals in inpatients, or the awareness of the medical team of this fact. What this study adds • Approximately 25% of patients hospitalized in internal medicine wards consume some kind of herbal or dietary supplement.• Consumption is associated with higher income, nonsmoking and benign prostatic hypertrophy.• The medical team was aware of the consumption in only 23% of the cases, and all drug–herbal interactions which we discovered were missed by the medical team.AimsHerbal remedies may have adverse effects and potentially serious interactions with some commonly prescribed conventional medications. Little is known about consumption of herbal remedies and dietary supplements by hospitalized patients. The aim was to evaluate the rate of consumption and characterize the patients hospitalized in internal medicine departments who consume herbal remedies and dietary supplements. Also, to assess the medical teams' awareness and assess the percentage of patients with possible drug–herb interactions.MethodsPatients hospitalized in the medical wards of two hospitals in Israel were interviewed about their use of herbal remedies or dietary supplements. The medical records were searched for evidence that the medical team had knowledge of the use of herbal remedies or dietary supplements.ResultsTwo hundred and ninety‐nine hospitalized medical patients were interviewed. Of the participants, 26.8% were herbal or dietary supplement consumers (HC). On multivariate analysis the only variates associated with herbal or dietary supplement consumption were the hospital [odds ratio (OR) 2.97, 95% confidence interval (CI) 1.29, 6.52], income (OR 0.39, 95% CI 0.15, 1.05), smoking habits (OR 0.17, 95% CI 0.05, 0.55) and benign prostatic hypertrophy (OR 4.64, 95% CI 1.3, 16.5). Ninety‐four percent of the patients had not been asked specifically of herbal consumption by the medical team. Only 23% of the hospital's medical files of the HC patients had any record of the use of herbal or dietary supplements. Seven possible drug–herbal interactions were encountered (7.1%). The most serious was an interaction between camomile tea and ciclosporin.ConclusionsHerbal remedy consumption is common amongst patients hospitalized in internal medicine wards and is often overlooked by the medical team. Patients and doctors should be more aware of the possible adverse effects and of the potential of herb–drug interactions.