bluuebunny/crossref_metadata_2025_split huggingface dataset:
Dimethylsulfoxid‐Komplexe von Beryllium(II)‐chlorid. Kristallstrukturen von [Be(OSMe2)4]Cl2, [Be(OSMe2)3(H2O)]Cl2 und [Be(OSMe2)2(H2O)2]Cl2
Authors: Neumüller Bernhard , Petz Wolfgang , Dehnicke Kurt 
Published: March 2008

AbstractDimethylsulfoxide Complexes of Beryllium(II) Chloride. Crystal Structures of [Be(OSMe2)4]Cl2, [Be(OSMe2)3(H2O)]Cl2 and [Be(OSMe2)2(H2O)2]Cl2Single crystals of the mixed ligand complexes [Be(OSMe2)3(H2O)]Cl2 (2) and [Be(OSMe2)2(H2O)2]Cl2 (3) were obtained from saturated solutions of [Be(OSMe2)4]Cl2 (1) in acetonitrile and dichloromethane, respectively, in the presence of traces of water, while single crystals of 1 were available by reaction of the carbodiphosphorane complex [BeCl2{C(PPh3)2}] with DMSO/toluene solution. All complexes are characterized by X‐ray diffraction and IR spectroscopy.1: Space group Pbca, Z = 8, lattice dimensions at 193 K: a = 962.4(1), b = 1888.8(2), c = 2115.8(2) pm, R1 = 0.0344. 1 consists of [Be(OSMe2)4]2+ cations with distorted tetrahedral coordination of the oxygen atoms of the DMSO molecules with Be–O distances of 161.9 pm on average, and chloride ions.2: Space group $P{\bar 1}$, Z = 2, lattice dimensions at 193 K: a = 903.9(2), b = 925.2(3), c = 1121.3(3) pm, α = 93.65(3)°, β = 108.03(3)°, γ = 115.20(3)°, R1 = 0.0472.3: Space group $P{\bar 1}$, Z = 2, lattice dimensions at 173 K: a = 788.2(2), b = 801.6(2), c = 1070.7(3) pm, α = 86.66(2)°, β = 83.80(2)°, γ = 71.00(2)°, R1 = 0.0699. 2 and 3 also form dications with distorted tetrahedral coordination of the Be2+ ions by the oxygen atoms of DMSO and water molecules, respectively. The chloride ions are associated by strong hydrogen bonds O–H···Cl to give three‐dimensional networks.
Ein neues Selten‐Erd‐Metall(III)‐Fluorid‐Oxoselenat(IV): YF[SeO3]
Authors: Lipp Christian , Schleid Thomas 
Published: March 2008

AbstractA New Rare‐Earth Metal(III) Fluoride Oxoselenate(IV): YF[SeO3]Just two representatives of the rare‐earth metal(III) fluoride oxoselenates(IV) with the formula type MF[SeO3] (M = La and Lu) exist so far, whereas for the intermediate lanthanoids only M3F[SeO3]4‐type compounds (M = Gd and Dy) were accessible. Because of the similar radius of Y3+ to the radii of the heavier lanthanoid cations, a missing link within the MF[SeO3] series could be synthesized now with the example of yttrium(III) fluoride oxoselenate(IV). Contrary to LuF[SeO3] with its triclinic structure, YF[SeO3] crystallizes monoclinically in space group P21/c (no. 14, a = 657.65(7), b = 689.71(7), c = 717.28(7) pm, β = 99.036(5)° and Z = 4). A single Y3+ cation occupying the general site 4e is surrounded by six oxide and two fluoride anions forming [YO6F2]11− polyhedra (d(Y–O) = 228–243 plus 263 pm, d(Y–F) = 219–220 pm). These are linked via common O···O edges to $^{1}_{\infty}\rm \{[YO^{e}_{4/2}O^{t}_{2/1}F^{t}_{2/1}]^{7-}\}$ chains running along [010] and adjacent chains get tied to each other by sharing common O3···O3 and O3···F edges which results in $^{2}_{\infty}\rm \{[Y(O3)_{3/3}(O2)_{2/2}(O1)_{1/1}F_{2/2}]^{4-}\}$ sheets parallel to (100). The Se4+ cations connect these $^{2}_{\infty}\rm \{[YO_{3}F]^{4-}\}$ sheets as ψ1‐tetrahedral [SeO3]2− anions (d(Se–O) = 168–174 pm) for charge balance via all oxygen atoms. Despite the different coordination numbers of seven and eight for the rare‐earth metal(III) cations the structures of LuF[SeO3] and YF[SeO3] appear quite similar. The $^{1}_{\infty}\rm \{[LUO^{e}_{4/2}O^{t}_{1/1}F^{t}_{2/1}]^{5-}\}$ chains containing pentagonal bipyramids [LuO5F2]9− are connected to $^{2}_{\infty}\rm \{[LUO^{e}_{4/2}O^{t}_{1/1}F^{e}_{2/2}]^{4-}\}$ layers running parallel to the (100) plane again. In fact it is only necessary to shorten the partial structure of the straight $^{1}_{\infty}\rm \{[LUF_{2/2}]^{2+}\}$ chains along [001] to achieve the angular $^{1}_{\infty}\rm \{[YF_{2/2}]^{2+}\}$ chains in YF[SeO3]. As a result of this shortening one oxide anion at a time moves into the coordination sphere of a neighboring Y3+ cation and therefore adds up the coordination number for Y3+ to eight. For the synthesis of YF[SeO3] yttrium sesquioxide (Y2O3), yttrium trifluoride (YF3) and selenium dioxide (SeO2) in a molar ratio of 1 : 1 : 3 with CsBr as fluxing agent were reacted within five days at 750 °C in evacuated graphitized silica ampoules.
Incidence and Risk Factors of Recurrence after Surgery for Pathology‐proven Diverticular Disease
Authors: Andeweg Caroline , Peters Joost , Bleichrodt Robert , van Goor Harry 
Published: March 2008

AbstractBackgroundDiverticular disease is a common problem in Western countries. Rationale for elective surgery is to prevent recurrent complicated diverticulitis and to reduce emergency procedures. Recurrent diverticulitis occurs in about 10% after resection. The pathogenesis for recurrence is not completely understood. We studied the incidence and risk factors for recurrence and the overall morbidity and mortality of surgical therapy for diverticular disease.MethodsMedical records of 183 consecutive patients with pathology‐proven diverticulitis were eligible for evaluation. Mean duration of follow‐up was 7.2 years. Number of preoperative episodes, emergency or elective surgeries, type of operation, level of anastomosis, postoperative complications, persistent postoperative pain, complications associated with colostomy reversal, and recurrent diverticulitis were noted. The Kaplan‐Meier method was used to calculate the cumulative probability of recurrence. Cox regression was used to identify possible risk factors for recurrence.ResultsThe incidence of recurrence was 8.7%, with an estimated risk of recurrence over a 15‐year period of 16%. Risk factors associated with recurrence were (younger) age (p < 0.02) and the persistence of postoperative pain (p < 0.005). Persistent abdominal pain after surgery was present in 22%. Eighty percent of patients who needed emergency surgery for acute diverticulitis had no manifestation of diverticular disease prior to surgery. In addition, recurrent diverticulitis was not associated with a higher percentage of emergency procedures.ConclusionEstimated risk of recurrence is high and abdominal complaints after surgical therapy for diverticulitis are frequent. Younger age and persistence of postoperative symptoms predict recurrent diverticulitis after resection. The clinical implication of these findings needs further investigation. The results of this study support the careful selection of patients for surgery for diverticulitis.
Eicosapentaenoic Acid Supplementation for Chronic Hepatitis C Patients During Combination Therapy of Pegylated Interferon α‐2b and Ribavirin
Authors: Kawashima Aiko , Tsukamoto Ikuyo , Koyabu Tomoko , Murakami Yasuko , Kawakami Takayo , Kakibuchi Naoko , Takaguchi Kouichi , Kita Keiji , Okita Misako 
Published: March 2008

AbstractEicosapentaenoic acid (EPA) (1.8 g/day) was administered to 12 chronic hepatitis C patients receiving combination therapy of pegylated interferon (PEG‐IFN) α‐2b and ribavirin for 48 weeks (EPA group). Twelve patients were not administered EPA (control group). All patients also received vitamin E and C (300, 600 mg/day, respectively) during the therapy. Serum alanine aminotransferase improved to a normal level in 8 of 12 patients from the EPA group and 6 of 12 patients from the control group after 12 weeks. Lymphocyte counts decreased significantly after 8 weeks in the control group, but not the EPA group. T‐helper (Th) 1 decreased after 4 weeks in the control group, but not in the EPA group (two‐way ANOVA;P< 0.05). Th1/Th2 ratios were elevated in 9 of 12 patients in the EPA group, and 3 out of 12 in the control group (P< 0.05) after 8 weeks. After 12 weeks, the arachidonic acid/EPA molar ratio of erythrocyte membrane phospholipid correlated negatively with the leukocyte count (n= 24,r= −0.439,P< 0.05) and the neutrophil count (n= 24,r= −0.671,P< 0.02). The hemoglobin level improved after 48 weeks compared with 24 weeks in only the EPA group. These findings suggest that EPA supplementation may be useful in therapy for chronic hepatitis C.
Effect of folic acid in women with and without insulin resistance who have hyperhomocysteinemic polycystic ovary syndrome
Authors: Kazerooni Talieh , Asadi Nasrin , Dehbashi Sedigheh , Zolghadri Jaleh 
Published: March 2008

AbstractObjectiveTo study the effect of folic acid on homocysteine (Hcy) levels in women with insulin resistance and polycystic ovary syndrome (PCOS) in a prospective clinical trial.MethodOf 210 women with PCOS, 70 were hyperhomocysteinemic; and of these, 32 were insulin resistant and 38 were not. The 70 women were treated with folic acid for 3 months. Baseline and serum levels of Hcy and insulin were measured in both groups.ResultsIn both groups Hcy concentrations were significantly decreased following folic acid supplementation. The mean ± SD levels before and after treatment were 14.03 ± 1.5 µmol/L and 12.53 ± 1.72 µmol/L in group 1 (P < 0.001), and they were 12.07 ± 0.87 µmol/L and 8.83 ± 0.78 µmol/L in group 2 (P < 0.001).ConclusionThe Hcy levels of hyperhomocysteinemic women with PCOS were reduced after 3 months of folic acid supplementation, and the rate of reduction was higher among women without insulin resistance. No change was found in fasting insulin levels.
Expression of aquaporin‐1 in normal, hyperplasic, and carcinomatous endometria
Authors: Pan Hong , Sun Chao‐Chao , Zhou Cai‐Yun , Huang He‐Feng 
Published: March 2008

AbstractObjectiveTo explore the relationship between aquaporin‐1 (AQP1) and endometrial adenocarcinoma.MethodIntratumoral microvessel density (IMD) was assessed as well as AQP1 and vascular endothelial growth factor expression in samples from 117 women, 75 with endometrioid adenocarcinoma, 17 with endometrial hyperplasia, and 25 with normal proliferative endometria.ResultsAQP1 was located in the epithelial cells of microvessels and small vessels in all samples. The AQP1/IMD ratio was highest in samples from the first, less in samples from the second, and least in samples from the third group. In samples from endometrioid adenocarcinoma, the AQP1/IMD ratio was significantly correlated with histologic grade, surgical stage, myometrial invasion, and extrauterine metastasis. There was a positive correlation between AQP1 expression and IMD and between AQP1/IMD ratio and VEGF expression.ConclusionAQP1 may be involved in the tumorigenesis and progression of endometrioid adenocarcinoma by promoting angiogenesis, and AQP1 level may be both a tumor indicator and a new therapeutic target.
Identifying biomarkers of endometriosis using serum protein fingerprinting and artificial neural networks
Authors: Wang Liang , Zheng Wei , Mu Lin , Zhang Su‐Zhan 
Published: March 2008

AbstractObjectivesTo use surface‐enhanced laser desorption/ionization time‐of‐flight mass spectrometry (SELDI‐TOF‐MS) protein chip array technology to detect proteomic patterns in the serum of women with endometriosis; build diagnostic models; and evaluate their clinical significance.MethodsSerum samples from women with endometriosis and healthy women were studied using SELDI‐TOF‐MS protein chip technology. For every matched pair, two‐thirds of the samples were used to look for different patterns and one‐third was used for cross‐validation.ResultsFive potential biomarkers were found and the diagnostic system distinguished endometriosis from validation samples with a sensitivity of 91.7% and a specificity of 90.0%.ConclusionThis method shows great potential in identifying biomarkers to be used for endometriosis screening.
A generalization of the topological Brauer group
Authors: Ershov A. V. 
Published: March 2008

AbstractIn the present paper we study some homotopy invariants which can be defined by means of bundles with fiber being a matrix algebra. In particular, we introduce some generalization of the Brauer group in the topological context and show that any of its elements can be represented as a locally trivial bundle with the structure group,k∈. Finally, we discuss its possible applications in the twistedK-theory.
Splitting along a submanifold pair
Authors: Jimenez Rolando , Muranov Yu. V. , Repovš Dušan 
Published: March 2008

AbstractThe paper introduces a group LSP of obstructions to splitting a homotopy equivalence along a pair of submanifolds. We develop exact sequences relating the LSP-groups with various surgery obstruction groups for a manifold triple and structure sets arising from a manifold triple. The natural map from the surgery obstruction group of the ambient manifold to the LSP-group provides an invariant when elements of the Wall group are not realized by normal maps of closed manifolds. Some LSP-groups are computed precisely.
Differences in fatty acid composition between cerebral brain lobes in juvenile pigs after fish oil feeding
Authors: Dullemeijer Carla , Zock Peter L. , Coronel Ruben , Den Ruijter Hester M. , Katan Martijn B. , Brummer Robert-Jan M. , Kok Frans J. , Beekman Jet , Brouwer Ingeborg A. 
Published: March 2008

Very long-chainn-3 PUFA from fish are suggested to play a role in the development of the brain. Fish oil feeding results in higher proportions ofn-3 PUFA in the brains of newborn piglets. However, the effect of fish oil on the fatty acid composition of specific cerebral brain lobes in juvenile pigs is largely uninvestigated. This study examined the effect of a fish oil diet on the fatty acid composition of the frontal, parietal, temporal and occipital brain lobes in juvenile pigs (7 weeks old). Pigs were randomly allocated to a semipurified pig diet containing either 4 % (w/w) fish oil (n19) or 4 % (w/w) high-oleic acid sunflower oil (HOSF diet,n18) for a period of 8 weeks. The fish oil diet resulted in significantly higher proportions (%) of DHA in the frontal (10·6 (sd1·2)), parietal (10·2 (sd1·5)) and occipital brain lobes (9·9 (sd1·3)), but not in the temporal lobe (7·7 (sd1·6)), compared with pigs fed the HOSF diet (frontal lobe, 7·5 (sd1·0); parietal lobe, 8·1 (sd1·3); occipital lobe, 7·3 (sd1·2), temporal lobe, 6·6 (sd1·2). Moreover, the proportion of DHA was significantly lower in the temporal lobe compared with the frontal, parietal and occipital brain lobes in pigs fed a fish oil diet. In conclusion, the brains of juvenile pigs appear to be responsive to dietary fish oil, although the temporal brain lobe is less responsive compared with the other three brain lobes. The functional consequences of these differences are a challenging focus for future investigation.
Prospective study of coffee and tea consumption in relation to risk of type 2 diabetes mellitus among men and women: The Whitehall II study
Authors: Hamer Mark , Witte Daniel R. , Mosdøl Annhild , Marmot Michael G. , Brunner Eric J. 
Published: March 2008

At least fourteen cohort studies have documented an inverse association between coffee consumption and risk of type 2 diabetes. We examined the prospective association between coffee and tea consumption and the risk of type 2 diabetes mellitus among British men (n 4055) and women (n 1768) from the Whitehall II cohort. During 11·7 years follow-up there were a total of 387 incident cases of diabetes confirmed by self-report of doctor's diagnosis or glucose tolerance tests. Despite an inverse association between coffee intake and 2 h post-load glucose concentration at the baseline assessment, combined caffeinated and decaffeinated coffee (hazard ratio (HR) 0·80; 95 % CI 0·54, 1·18) or only decaffeinated coffee intake (HR 0·65; 95 % CI 0·36, 1·16) was not significantly associated with diabetes risk at follow-up after adjustment for possible confounders. There was an association between tea intake and diabetes (HR 0·66; 95 % CI 0·61, 1·22; P < 0·05) after adjustment for age, gender, ethnicity and social status, which was not robust to further adjustments. There was, however, an association between combined intake of tea and coffee (two or more cups per day of both beverage) and diabetes (HR 0·68; 95 % CI 0·46, 0·99; P < 0·05) after full adjustment. In conclusion, relatively moderate intake (more than three cups per day) of coffee and tea were not prospectively associated with incidence of type 2 diabetes although there was evidence of a combined effect. The limited range of exposure and beverage consumption according to socio-economic class may explain these conflicting findings.
Recurrence in pairs
Authors: HADDAD KAMEL , OTT WILLIAM 
Published: March 2008

AbstractWe introduce and study the notion of weak product recurrence. Two sufficient conditions for this type of recurrence are established. We deduce that any point with a dense orbit in either the full one-sided shift on a finite number of symbols or a mixing subshift of finite type is weakly product recurrent. This observation implies that distality does not follow from weak product recurrence. We have therefore answered, in the negative, a question posed by Auslander and Furstenberg.
A comparison of Bayesian prediction techniques for mobile robot trajectory tracking
Authors: Peralta-Cabezas J. L. , Torres-Torriti M. , Guarini-Hermann M. 
Published: March 2008

SUMMARYThis paper presents a performance comparison of different estimation and prediction techniques applied to the problem of tracking multiple robots. The main performance criteria are the magnitude of the estimation or prediction error, the computational effort and the robustness of each method to non-Gaussian noise. Among the different techniques compared are the well-known Kalman filters and their different variants (e.g. extended and unscented), and the more recent techniques relying on Sequential Monte Carlo Sampling methods, such as particle filters and Gaussian Mixture Sigma Point Particle Filter.
Variation patterns within 153 flax (Linum usitatissimum L.) genebank accessions based on evaluation for resistance to fusarium wilt, anthracnose and pasmo
Authors: Diederichsen Axel , Rozhmina Tatiana A. , Kudrjavceva Ljudmilla P. 
Published: March 2008

Germplasm of 153 flax (Linum usitatissimum) accessions from 24 countries held at Plant Gene Resources of Canada (PGRC) was evaluated for resistance to fusarium wilt (Fusarium oxysporum), anthracnose (Colletotrichum lini) and pasmo (Septoria linicola). The screening was conducted at the All-Russian Flax Research Institute (VNIIL) at Torzhok, Russia, over 3 years for fusarium wilt and anthracnose, and over 2 years for pasmo. A disease severity index ranging from 0% (no infection) to 100% (heavy infection) was calculated based on observations after artificial inoculation with the pathogens in the greenhouse (fusarium wilt) or in field nurseries (anthracnose and pasmo). The average disease severity index for fusarium wilt was 56.6 ± 34.4% (range 0–100.0%), for anthracnose 59.8 ± 8.1% (range 43.8–83.9%) and for pasmo 74.2 ± 11.8% (range 27.3–100.0%). The variation of disease severity indices among the years and within each accession was highest for fusarium wilt. Higher than average resistance for all three diseases was found in accessions from East Asia, while germplasm from the Indian subcontinent showed considerably lower than average resistance. Germplasm from North America and South America (mostly linseed) displayed above average resistance to fusarium wilt, while European accessions (mostly fibre flax) showed lower than average resistance to this disease. The different resistance levels reflected the improvements made by plant breeding and differences in the environments under which the germplasm accessions evolved. Accessions with potential use in linseed and fibre flax breeding were identified.
Polarized‐Light‐Stimulated Enzymatic Hydrolysis of Xylan
Authors: Konieczna‐Molenda Anna , Lai Vivian M. F. , Fiedorowicz Maciej , Khachatryan Gohar , Tomasik Piotr 
Published: March 2008

AbstractThe 1‐ to 2‐h illumination of xylanase with visible polarized light (PL) prior to the action of that enzyme upon beechwood xylan significantly increased its activity. The activity only negligibly decreased on 3 months storage. The hydrolysis of xylan proceeded in three well‐distinguished stages. In the first and fastest stage the effect of illumination was only slightly positive. The effect of the stimulation was noted in the second, slower stage. Enzyme stimulated with PL, preferably by means of the 2‐h illumination, performed better than enzyme stimulated with nonpolarized light and non‐stimulated enzyme. In the last, the slowest stage, the rates of the reaction were nearly the same using either stimulated or non‐stimulated enzyme.
Ecological state and monitoring of limnological and biological parameters in Lake Ladoga, Russia
Authors: Viljanen Markku , Drabkova Valentina , Avinsky Valentin , Kapustina Larisa , Raspletina Galina 
Published: March 2008

Lake Ladoga (17 891 km2) is the largest lake in Europe, with a 258 000 km2drainage area that extends to much of north-western European Russia and eastern Finland. Its ecosystem has been systematically investigated since 1976, and sporadically since the 1950s. Monitoring programmes have included studies on its hydrology, water chemistry and biology (phytoplankton, bacterioplankton, zooplankton, benthos, macrophytes and fish). The sampling frequency per vegetation season (spring, summer and autumn) has varied from 2 to 6 times, and samples have been collected at 20–60 fixed stations in the different zones of the lake. These long-term investigations covering over 40 years serve as a good basis for understanding the processes taking place in Lake Ladoga, as well as for assessing the changes and current environmental conditions.
Until the early 1960s, Lake Ladoga was oligotrophic and characterized by good water quality; but within the past 30 years, as a result of human impact, its ecological state seems to have deteriorated. Especially since the 1970s, its trophic state has changed to mesotrophic, with elevated nutrient concentrations, reduced transparency and poorer fish catches, together with structural changes in its plankton, zoobenthos and fish communities. During the last decades, several planktonic, benthic and fish species that are sensitive to eutrophication have disappeared. Conditions in the whole lake, and especially at some of the worst-polluted sites, have actually improved in recent years, however, due to the closing of some of the sources of industrial pollution, and some signs of a recovery have been observed. The present species composition points to mesotrophic and eutrophic conditions in the coastal regions, but mainly oligo-mesotrophic conditions in the pelagic areas.
The aim of this paper is to describe and assess monitoring practices in Lake Ladoga and the results obtained, future prospects, changes that have occurred and the current state of the ecosystems.
Immediate Memory and Simultaneous Stimuli
Authors: Broadbent D. E. 
Published: March 2008

When two sets of digits are presented simultaneously one to one ear and one to the other, the subject may be asked to write them down from immediate memory beginning with those on an ear chosen by the experimenter. He can do this, but any mistakes are usually amongst those on the ear prescribed for later response. If the subject does not know the order of recall until after stimulation, he either shows low efficiency with the same serial order effect, or else normal efficiency with an altered serial order effect. When the order of recall is known in advance, efficiency is also reduced by altering the time of presentation of the last items to be recalled; and also by inserting irrelevant items. All these facts are consistent with a particular theory of immediate memory.