bluuebunny/crossref_metadata_2025_split huggingface dataset:
Heterogeneization of alpha diimines nickel catalysts for the polymerization of ethylene and methylmethacrylate
Authors: Matos Inês , Fernandes Auguste , Catalão Rita , Botelho do Rego Ana M. , Ascenso José R. , Fonseca Isabel F. , Lemos Francisco , Marques Maria M. 
Published: July 2017

AbstractIn this paper we present two different techniques for the preparation of single site heterogeneous catalyst. The first method consists in the impregnation of a solution of the organometallic compound in MCM41. The second method intends to establish the in situ synthesis of the complex within the solid’s pores by the reaction of the organic ligand with the metal cation previously introduced in the support. The direct deposition of the organometallic complex in the support resulted in an active catalyst which gives polyethylene with the same microstructure as the one obtained with the related homogeneous systems. The heterogeneous catalysts obtained by reaction of the ligand with the metal already present in the support showed a lower catalytic activity.
Role of interfacial interaction on the crystallization behavior and melting characteristics of PP/Nano-CaCO3 composites modified with different compatibilizers
Authors: Wang Yuhai , Shen Hao , Li Gu , Mai Kancheng 
Published: July 2017

AbstractPP/nano-CaCO3 composites with different interfacial interaction were prepared by addition of compatibilizers with the same polar groups but different backbones. The non-isothermal and isothermal crystallization behavior of PP/nano- CaCO3 composites was investigated using differential scanning calorimetry (DSC). The results indicated that the interfacial interaction between PP and nano-CaCO3 increased the crystallization temperature and crystallization rate of PP due to the heterogeneous nucleation of nano-CaCO3. The interfacial interaction between nano- CaCO3 and compatibilizer further increased the crystallization temperature and crystallization rate of PP and induced the formation of β-crystal of PP due to the synergistic effect of heterogeneous nucleation between nano-CaCO3 and compatibilizer. This synergistic effect of heterogeneous nucleation between nano- CaCO3 and compatibilizer depended on the interfacial interaction between compatibilizer and PP matrix. The increased compatibility between compatibilizer and PP matrix favoured the heterogeneous nucleation between nano-CaCO3 and compatibilizer
Clinical features and genotyping of patients with primary carnitine deficiency identified by newborn screening
Authors: Sun Yun , Wang Yan-yun , Jiang Tao 
Published: July 2017

AbstractBackground:The objective of the study was to investigate clinical and gene mutation characteristics of primary carnitine deficiency (PCD) patients identified by newborn screening using tandem mass spectrometry (MS/MS).Methods:Tandem mass spectrometry (MS/MS) was applied to screen inherited metabolic disease and seven patients with PCD were diagnosed among 62,568 samples. TheResults:The initial free carnitine (C0) concentrations of the patients were 6.43±1.36 μmol/L, and the recall screening concentrations were 5.59±0.89 μmol/L. The patients were treated with oral carnitine, so the levels after treatment were 20.24±3.88 μmol/L. All patients had two pathogenic mutation alleles.Conclusions:The combined application of MS/MS and a next generation sequencing panel could be used for the accurate diagnosis of PCD. The results of genetic diagnosis can guide the assisted reproductive treatment. The prognosis of PCD patients is good after early treatment.
Comparison of healthcare utilization and outcomes by gestational diabetes diagnostic criteria
Authors: Lauring Julianne R. , Kunselman Allen R. , Pauli Jaimey M. , Repke John T. , Ural Serdar H. 
Published: July 2017

Abstract

Objective:
To compare healthcare utilization and outcomes using the Carpenter-Coustan (CC) criteria vs. the National Diabetes Data Group (NDDG) criteria for gestational diabetes mellitus (GDM).

Methods:
This is a retrospective cohort study. Prior to 8/21/2013, patients were classified as “GDM by CC” if they met criteria. After 8/21/2013, patients were classified as “GDM by NDDG” if they met criteria and “Meeting CC non-GDM” if they met CC, but failed to reach NDDG criteria. “Non-GDM” women did not meet any criteria for GDM. Records were reviewed after delivery.

Results:
There was a 41% reduction in GDM diagnosed using NDDG compared to CC (P=0.01). There was no significant difference in triage visits, ultrasounds for growth or hospital admissions. Women classified as “Meeting CC non-GDM” were more likely to have preeclampsia than “GDM by CC” women [OR 11.11 (2.7, 50.0), P=0.0006]. Newborns of mothers “Meeting CC non-GDM” were more likely to be admitted to neonatal intensive care units than “GDM by CC” [OR 6.25 (1.7, 33.3), P=0.006], “GDM by NDDG” [OR 5.56 (1.3, 33.3), P=0.018] and “Non-GDM” newborns [OR 6.47 (2.6, 14.8), P=0.0003].

Conclusion:
Using the NDDG criteria may increase healthcare costs because while it decreases the number of patients being diagnosed with GDM, it may also increase maternal and neonatal complications without changing maternal healthcare utilization.
First trimester β-hCG and estradiol levels in singleton and twin pregnancies after assisted reproduction
Authors: Póvoa Ana , Xavier Pedro , Matias Alexandra , Blickstein Isaac 
Published: July 2017

Abstract

Objective
To compare levels of β-hCG and estradiol collected during the first trimester in singleton and twin pregnancies following assisted reproduction technologies (ART).

Methods
We prospectively evaluated 50 singleton and 47 dichorionic twin pregnancies that eventually ended in live births. Patients were recruited from a single ART center with standard treatment protocols followed by fresh embryo transfers. Hormone measurements were performed within a narrow gestational age range and analyzed in a single laboratory thus minimizing inter- and intra-assay variability. We measured serum β-hCG at 13 days after embryo transfer as well as samples of β-hCG and estradiol at 8–9 weeks+6 days.

Results
No significant differences existed between singletons and twins in respect to demographic and cycle characteristics. β-hCG and estradiol were all significantly higher in twins (P<0.05).

Conclusion
The data confirms the higher levels of β-hCG and estradiol in twins, pointing to the potential role of these placental hormones in early support of a twin pregnancy.
Smoothing Approximation to the Square-Root Exact Penalty Function
Authors: Duan Yaqiong , Lian Shujun 
Published: July 2017

AbstractIn this paper, smoothing approximation to the square-root exact penalty functions is devised for inequality constrained optimization. It is shown that an approximately optimal solution of the smoothed penalty problem is an approximately optimal solution of the original problem. An algorithm based on the new smoothed penalty functions is proposed and shown to be convergent under mild conditions. Three numerical examples show that the algorithm is efficient.
Kinetic properties and structural analysis of LaCrO3nanoparticles
Authors: Enhessari Morteza , Salehabadi Ali , Khoobi Asma , Amiri Razie 
Published: July 2017

AbstractLaCrO3perovskite nanopowders were successfully prepared via a sol-gel method using stoichiometric proportion of materials containing lanthanum and chromium in stearic acid complexing agent. Structural analysis of LaCrO3indicated an octahedral framework in its XRD pattern bearing crystallite size in the range of 28 nm. The particle sizes were confirmed by morphological scanning of the sample. The optical properties of LaCrO3nanopowders clearly indicated an interesting optical activity of LaCrO3in the UV and visible ranges. The degradation activation energy (Ed) was calculated from the output of a moderate thermal programming profile at about 207.97 kJ·mol-1using Kissinger equation. Capacity, impedance and AC resistance of the perovskites was obtained at 2.970 nF, 2.522 MΩ and 16.19 MΩ, respectively.
Crystal structure of bis(tetraethylammonium) [1,1′-biphenyl]-2,2′-dicarboxylate trihydrate, C30H54N2O7
Authors: Cheng Di , Zai Yanbing 
Published: July 2017

Abstract
C30H54N2O7, orthorhombic, P21212 (no. 18), a = 11.6240(9) Å, b = 12.9628(11) Å, c = 10.5166(9) Å, V = 1584.6(2) Å3, Z = 2, R
gt(F) = 0.038, wR
ref(F
2) = 0.115, T = 296 K.
Maize and Potato Intercropping: A Technology to Increase Productivity and Profitability in Tigray
Authors: Kidane Beyenesh Z. , Hailu Mereseit H. , Haile Haile T. 
Published: July 2017

Abstract
Smallholders have limited landholding in the highlands of Tigray and therefore there is a critical need to improve land use efficiency (LUE). One way to improve the LUE is through intercropping of companion crops including maize and potato. An experiment was conducted to evaluate the intercropping ratio as a means to improve land use efficiency during the 2012 cropping season. The treatments tested were three intercropping ratios of maize: potato in 1:1, 1:2, 2:1 row arrangement compared against the maize and potato only cropping. The objective of the study was to identify the best intercropping ratio that maximizes land use efficiency. Land equivalent ratio (LER) was used to compare the land use efficiency of the intercrops with each sole crop. The total yield of intercropped crops were greater than sole cropping, shown by LER>1. The overall advantage of intercropping ranged from 35 to 58%. The highest land equivalent value of 58% was recorded for one maize and two potato rows arrangements indicated a yield advantage of 58% over sole crop. The partial land equivalent value of both crops in intercropping was less than one indicating the cohesiveness of both crops in intercropping. Thus, it can be concluded that 1maize: 2 potato intercropping is a viable agronomic option in increasing land use efficiency and increased food security. It is, therefore, imperative to demonstrate the best treatment under farmer’s condition.
Drug Flow Through Clinical Infusion Systems: How Modeling of the Common-volume Helps Explain Clinical Events
Authors: Lovich Mark A. , Peterfreund Robert A. 
Published: July 2017

AbstractThis review aims to describe analytic models of drug infusion that demonstrate the impact of the infusion system common-volume on drug delivery. The common-volume of a drug infusion system is defined as the volume residing between the point where drug and inert carrier streams meet and the patient’s blood. We describe 3 sets of models. The first is quantitative modeling which includes algebraic mathematical constructs and forward-difference computational simulation. The second set of models is with in vitro benchtop simulation of clinical infusion system architecture. This modeling employs devices including pumps, manifolds, tubing and catheters used in patient care. The final set of models confirms in vitro findings with pharmacodynamic endpoints in living large mammals. Such modeling reveals subtle but important issues inherent in drug infusion therapy that can potentially lead to patient instability and morbidity. The common-volume is an often overlooked reservoir of drugs, especially when infusions flows are slowed or stopped. Even with medications and carriers flowing, some mass of drug always resides within this common-volume. This reservoir of drug can be inadvertently delivered into patients. When infusions are initiated, or when dose rate or carrier flow is altered, there can be a significant lag between intended and actual drug delivery. In the case of vasoactive and inotropic drug infusions, these unappreciated time delays between intended and actual drug delivery can lead to iatrogenic hemodynamic instability. When a drug infusion is discontinued, drug delivery continues until the common-volume is fully cleared of residual drug by the carrier. The findings from all 3 sets of models described in this review indicate that minimizing the common-volume of drug infusion systems may enhance patient safety. The presented models may also be configured into teaching tools and possibly point to technological solutions that might mitigate sources of iatrogenic patient lability.
Some inferences on the distribution of the Demmel condition number of complex Wishart matrices
Authors: Shakil M. , Ahsanullah M. 
Published: July 2017

Abstract
In recent years, many researchers have studied the distributions of the Demmel (or the scaled) condition numbers (DCN) of complex Wishart matrices. In this paper, several new distributional properties of the distribution of the Demmel condition number of complex Wishart matrices are presented. The limiting distributions of the standardized extreme order statistics are given. Since the truncated distributions arise in practical statistics where the ability of record observations is limited to a given threshold or within a specified range, there has been a great interest, in recent years, in the characterizations of probability distributions by truncated moments. Before a particular probability distribution model is applied to fit the realworld data, it is necessary to confirm whether the given continuous probability distribution satisfies the underlying requirements by its characterization. Therefore, in this paper, some characterizations of the distribution of DCN are also shown. We hope that the findings of this paper will be quite useful in many fields of pure and applied sciences, such as, probability, statistics, multivariate statistics, linear algebra, operator algebra theory, actuarial science, physics, wireless communications, and polarimetric synthetic aperture radar (PolSAR), among others.
Design, synthesis, and antibacterial activity of novel 8-methoxyquinoline-2-carboxamide compounds containing 1,3,4-thiadiazole moiety
Authors: Qu Tengfei , Qu Lailiang , Wang Xiaoguang , Xu Ting , Xiao Xiao , Ding Min , Deng Li , Guo Yong 
Published: July 2017

Abstract
A series of novel 8-methoxyquinoline-2-carboxamide compounds containing 1,3,4-thiadiazole moiety was designed and synthesized by using an active substructure combination method. Then, the antibacterial activities of all the target compounds were evaluated in vitro against three Gram-positive bacteria and three Gram-negative bacteria. The antibacterial assay showed that some target compounds displayed moderate to good antibacterial efficacy in comparison with the reference drug Chloromycin. Some interesting results of structure-activity relationships were also discussed.
Instrumentación cervical en pacientes menores de 10 años. [Cervical Instrumentation and Fusion in Children Under 10 Years Old.]
Authors: Sotomayor Harrynson Enmanuel , Remondino Rodrigo , Tello Carlos , Galaretto Eduardo , Francheri Ida , Bersusky Ernesto , Noel Mariano 
Published: July 2017

<p><strong>Objetivos:</strong> Evaluar los resultados postoperatorios de una serie de pacientes pediátricos menores de 10 años sometidos a fusión cervical instrumentada, descripción de la técnica quirúrgica y complicaciones.</p><p><strong>Introducción: </strong>La instrumentación de la columna cervical pediátrica ha ganado terreno en la última década. Las diferencias anatómicas y biomecánicas entre la columna cervical pediátrica y del adulto hacen que la cirugía requiera de una minuciosa preparación preoperatoria toda vez que se utilizan implantes diseñados para adultos.</p><p><strong>Métodos:</strong> Se evaluaron 28 pacientes con patología cervical tratados con fusión instrumentada utilizando las técnicas descriptas por Roy-Camille y Magerlpara masas laterales, de Goel-Harms para C1-C2, y las fusiones occípito-cervicales con placas occipitales o rótulas. Los criterios de inclusión: menores de 10 años, cirugía primaria con un seguimiento mínimo de 2 años.</p><p><strong>Resultados:</strong> Obtuvimos una muestra de 17 mujeres y 11 hombres con un seguimiento promedio de 3,8 años (2-10). La edad promedio fue 6,1 años (1,6-10). Existió una tasa promedio de complicaciones generales del 32.1%. Las patologías que más complicaciones registraron fueron: síndromes genéticos 6 casos (21,4%), junto a las displasias esqueléticas 3 casos (10,7%). 13 pacientes fueron menores de 6 años, 7 de ellos presentaron complicaciones (53,8%).</p><p><strong>Conclusión:</strong> La instrumentacion cervical en pacientes menores de 10 años demostró ser un procedimiento factible y seguro. Las displasias vertebrales, anomalías congénitas y sindrómicas, sumado al factor edad menores de 6 años, son las principales variables asociadas a las complicaciones obtenidas.</p><p>Trabajo descriptivo retrospectivo Nivel IV</p>
Association between SNP rs9485372 in TAB2 gene and breast cancer risk  in Vietnamese women
Authors: Huong Nguyen Thi Lan , Thanh Nguyen Thi Ngoc , Hue Nguyen Thi 
Published: July 2017

Background: Breast cancer is a complex and common cancer in women. In the purpose of prevention and treatment of the disease, many studies have been conducted recently all over the world. The genetic factor is known as an important factor has been studied to provide information for early diagnosis. Within several genetic factors involved in the development of breast cancer, TAB2 gene in 6q25.1 is a breast cancer susceptibility locus. The SNP r9485372 in TAB2 gene is associated with breast cancer in East Asian population including Chinese and Korean but not in Indian and Japanese. In this study, we conducted a case-control study to evaluate the association of this SNP with breast cancer risk in the Vietnamese population.
Methods: 109 controls and 111 cases were genotyped by HRM method and logistic regression analysed.
Results: We found that the frequency of SNP alleles is roughly similar to East Asian population: the major allele is G occupied 59.63%, the minor allele is A with 40.37% in the Vietnamese population. The allelic distribution of SNP rs9485372 was not significantly different between case and control group (ORA vs. G (95% CI) = 0.93 (0.64 - 1.37), P-value = 0.73).
Conclusion: Our finding thus suggested that this SNP is not significantly associated with breast cancer in Vietnamese women. However, the power of this study is quite low at only 4.46% that was partly caused by a small sample size. Hence, a further study needs to be conducted with a larger sample size in the future to confirm the association of this SNP with breast cancer in Vietnamese women.
Effect of Alcohol Consumption on Clinical Attachment Loss Progression in an Urban Population From South Brazil: A 5‐Year Longitudinal Study
Authors: Wagner Marcius C. , Haas Alex N. , Oppermann Rui V. , Rosing Cassiano K. , Albandar Jasim M. , Susin Cristiano 
Published: July 2017

Background: The aim of this study is to investigate the impact of alcohol consumption on clinical attachment loss (AL) progression over a period of 5 years.Methods: A multistage probability sampling strategy was used to draw a representative sample of the metropolitan area of Porto Alegre, Brazil. Five hundred thirty‐two individuals (209 males and 293 females) aged 18 to 65 years at baseline with no medical history of diabetes and at least six teeth were included in this analysis. Full‐mouth periodontal examinations with six sites per tooth were conducted at baseline and after 5 years. Alcohol consumption was assessed at baseline by asking participants about the usual number of drinks consumed in a week. Four categories of alcohol consumption were defined: 1) non‐drinker; 2) ≤1 glass/week; 3) >1 glass/week and ≤1 glass/day; and 4) >1 glass/day. Individuals showing at least two teeth with proximal (clinical AL) progression ≥3 mm over 5 years were classified as having disease progression. Multiple Poisson regression models adjusted for age, sex, smoking, socioeconomic status, and body mass index were used to estimate relative risks (RRs) and 95% confidence intervals (CIs).Results: Overall, individuals who consumed >1 glass/day had 30% higher risk for clinical AL progression (RR = 1.30; 95% CI: 1.07 to 1.58) than non‐drinkers. Among males, risk of clinical AL progression for individuals drinking >1 glass/day was 34% higher than non‐drinkers (RR = 1.34; 95% CI: 1.09 to 1.64). Never‐smoker males drinking ≤1 glass/week had significantly lower risk for clinical AL progression than non‐drinkers (RR = 0.52; 95% CI: 0.30 to 0.89), whereas those drinking >1 glass/day had significantly higher risk (RR = 1.50; 95% CI: 1.08 to 1.99). Among females, no association between alcohol consumption and clinical AL progression was observed.Conclusions: Alcohol consumption increased the risk of clinical AL progression, and this effect was more pronounced in males. Low dosages (≤1.37 g of alcohol/day) of alcohol consumption may be beneficial to prevent periodontal disease progression in males. The impact of alcohol cessation initiatives on periodontal health should be evaluated.
A “saga” político-ecológica da algaroba no semiárido brasileiro
Authors: Burnett Annahid 
Published: July 2017

A “saga” da algaroba (Prosopis juliflora) no semiárido envolveu uma grande diversidade de atores sociais, dentro do cenário desenvolvimentista, quando se pregava a introdução desta espécie como “salvação” socioeconômica para a região. O objetivo deste artigo é de analisar a construção do discurso salvacionista que deu suporte à implantação da tecnologia da algaroba. Investigar que atores sociais participaram dessa construção e quais eram suas estratégias e interesses. Como metodologia usamos o levantamento bibliográfico pertinente ao objeto de estudo na referida época, como também da documentação dos registros da imprensa escrita nos jornais da região. Palavras-chave: algaroba, ecologia, semiárido, desenvolvimento, tecnologia.
O uso do calendário socioecológico na estruturação do currículo das escolas indígenas: uma proposta interdisciplinar e intercultural
Authors: Nunes Cleunice de Barros , Valadares Juarez Melgaço , Da Silveira Júnior Célio 
Published: July 2017

Neste trabalho, analisamos a trajetória de um grupo de professores indígenas da etnia Xakriabá, que vivem no Norte de Minas Gerais, e que, nos últimos anos, tem se voltado para a incorporação e valorização da sua cultura no currículo de suas escolas. Como instrumento teórico-metodológico, esses professores têm se amparado no Calendário Socioecológico proposto por Gasché. A partir das entrevistas realizadas com dois professores, buscamos os limites e as possibilidades que vivenciaram ao longo desse processo: Que conteúdos construíram para o currículo, a partir do uso do calendário socioecológico? Que dificuldades encontraram? Por meio de uma abordagem qualitativa, procuramos apreender a dinâmica, a complexidade e o desenrolar da trama curricular na escola, a partir dos significados atribuídos por seus atores ao cumprimento da tarefa. Apoiados no referencial do francês René Kaës, buscamos os impasses vividos e as saídas encontradas pelos professores, de forma a aprofundar nosso conhecimento sobre a função social da escola para os povos indígenas. As respostas obtidas nos evidenciaram as dificuldades de se incorporar a “cultura indígena” em articulação com os saberes acadêmicos. Conclusões importantes sobre os desafios na implementação de experiências curriculares inovadoras são mencionadas, bem como são indicados alguns impactos para a formação docente.