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Yao Shen, Yao-Dong Li, Hongliang Wo, Yuesheng Li, Shoudong Shen, Bingying Pan, Qisi Wang, H C Walker, P Steffens, M Boehm, Yiqing Hao, D L Quintero-Castro, L W Harriger, M D Frontzek, Lijie Hao, Siqin Meng, Qingming Zhang, Gang Chen, Jun Zhao
A quantum spin liquid is an exotic quantum state of matter in which spins are highly entangled and remain disordered down to zero temperature. Such a state of matter is potentially relevant to high-temperature superconductivity and quantum-information applications, and experimental identification of a quantum spin liquid state is of fundamental importance for our understanding of quantum matter. Theoretical studies have proposed various quantum-spin-liquid ground states, most of which are characterized by exotic spin excitations with fractional quantum numbers (termed 'spinons')...
December 5, 2016: Nature
Amaia Hervás, Teresa de Santos, Javier Quintero, Pedro M Ruíz-Lázaro, José A Alda, Alberto Fernández-Jaén, Josep A Ramos-Quiroga
INTRODUCTION: Attention Deficit Hyperactivity Disorder (ADHD) is one of the most prevalent neurodevelopmental disorders in childhood, which is frequently maintained in adolescent and adult age. It presents great clinical heterogeneity, significantly affecting the functioning of those who suffer it. Although drug treatments obtain results by themselves, the approach should be multidisciplinary and be adapted to the specific needs of each patient and his/ her family. Given the variety of drugs currently available to treat ADHD, there are diverse opinions on the most effective way to approach this disorder...
November 2016: Actas Españolas de Psiquiatría
Paulo José Llinás, Rafael Fernando Serrano, Laureano Quintero Barrera, Juan Carlos Quiceno Noguera, Juan Pablo Martinez Cano
BACKGROUND: The World Games is a multisport event, second in importance only to the Olympic Games. Systematic surveillance of injuries and ill-health episodes is an essential part of modern integral healthcare given to athletes. AIM: To describe and analyse injuries and ill-health episodes affecting competitors during the Cali World Games 2013. METHODS: This is a cross-sectional study of injuries and ill-health episodes suffered by competing athletes...
2016: BMJ Open Sport & Exercise Medicine
Mayerly Prada Rico, Jaime Fernández Sarmiento, Ana María Rojas Velasquez, Luz Stella González Chaparro, Ricardo Gastelbondo Amaya, Hernando Mulett Hoyos, Daniel Tibaduiza, Ana Maria Quintero Gómez
BACKGROUND: Anticoagulation of the continuous renal replacement therapy (CRRT) circuit is an important technical aspect of this medical procedure. Most studies evaluating the efficacy and safety of citrate use have been carried out in adults, and little evidence is available for the pediatric patient population. The aim of this study was to compare regional citrate anticoagulation versus systemic heparin anticoagulation in terms of the lifetime of hemofilters in a pediatric population receiving CRRT at a pediatric center in Bogota, Colombia...
November 28, 2016: Pediatric Nephrology: Journal of the International Pediatric Nephrology Association
Hugo Villamil-Ramírez, Paola León-Mimila, Luis R Macias-Kauffer, Adrián Canizalez-Román, Marisela Villalobos-Comparán, Nidia León-Sicairos, Joel Vega-Badillo, Fausto Sánchez-Muñoz, Blanca López-Contreras, Sofía Morán-Ramos, Teresa Villarreal-Molina, Luis C Zurita, Francisco Campos-Pérez, Adriana Huertas-Vazquez, Rafael Bojalil, Sandra Romero-Hidalgo, Carlos A Aguilar-Salinas, Samuel Canizales-Quinteros
Obesity is a major public health concern in Mexico and worldwide. Although the estimated heritability is high, common variants identified by genome-wide association studies explain only a small proportion of this heritability. A combination of linkage and association strategies could be a more robust and powerful approach to identify other obesity-susceptibility variants. We thus sought to identify novel genetic variants associated with obesity-related traits in the Mexican population by combining these methods...
November 24, 2016: Journal of Human Genetics
Jose J Virgen-Ortíz, Veymar G Tacias-Pascacio, Daniela B Hirata, Beatriz Torrestiana-Sanchez, Arnulfo Rosales-Quintero, Roberto Fernandez-Lafuente
Lipase B from Candida antarctica (CALB) has been physically immobilized on octyl-agarose via interfacial activation. The incubation of the enzyme in 80% ethanol at pH 5 and 25°C has not significant effect on enzyme activity. Moreover, the hydrolysis of 100mM tributyrin catalyzed by this biocatalyst exhibited a quite linear reaction course. However, a new cycle of tributyrin hydrolysis showed a drastic drop in the activity. SDS-PAGE gels of the supernatant and the biocatalyst showed a significant enzyme desorption after the reaction...
January 2017: Enzyme and Microbial Technology
Fernando Bugatto, Rocío Quintero-Prado, José M Vilar-Sánchez, Germán Perdomo, Rafael Torrejón, José L Bartha
INTRODUCTION: The influence of maternal body mass index (BMI) on respiratory quotient during pregnancy is not clear. We aim to evaluate longitudinal changes in energy expenditure, respiratory quotient and substrate oxidation rates in normal and overweight women with uncomplicated pregnancies. We hypothesized that the threshold period in switching from a predominantly carbohydrate to a predominantly lipid metabolism may be different in normal and overweight women. MATERIAL AND METHODS: Forty healthy pregnant women were recruited for a prospective cohort study...
November 15, 2016: Acta Obstetricia et Gynecologica Scandinavica
C Quintero-Quiroz, J Tiana-Alsina, J Romà, M C Torrent, C Masoller
Identifying transitions to complex dynamical regimes is a fundamental open problem with many practical applications. Semi- conductor lasers with optical feedback are excellent testbeds for studying such transitions, as they can generate a rich variety of output signals. Here we apply three analysis tools to quantify various aspects of the dynamical transitions that occur as the laser pump current increases. These tools allow to quantitatively detect the onset of two different regimes, low-frequency fluctuations and coherence collapse, and can be used for identifying the operating conditions that result in specific dynamical properties of the laser output...
November 18, 2016: Scientific Reports
Marcello Ziosi, Ivano Di Meo, Giulio Kleiner, Xing-Huang Gao, Emanuele Barca, Maria J Sanchez-Quintero, Saba Tadesse, Hongfeng Jiang, Changhong Qiao, Richard J Rodenburg, Emmanuel Scalais, Markus Schuelke, Belinda Willard, Maria Hatzoglou, Valeria Tiranti, Catarina M Quinzii
Coenzyme Q (CoQ) is an electron acceptor for sulfide-quinone reductase (SQR), the first enzyme of the hydrogen sulfide oxidation pathway. Here, we show that lack of CoQ in human skin fibroblasts causes impairment of hydrogen sulfide oxidation, proportional to the residual levels of CoQ. Biochemical and molecular abnormalities are rescued by CoQ supplementation in vitro and recapitulated by pharmacological inhibition of CoQ biosynthesis in skin fibroblasts and ADCK3 depletion in HeLa cells. Kidneys of Pdss2(kd/kd) mice, which only have ~15% residual CoQ concentrations and are clinically affected, showed (i) reduced protein levels of SQR and downstream enzymes, (ii) accumulation of hydrogen sulfides, and (iii) glutathione depletion...
November 17, 2016: EMBO Molecular Medicine
Zhe Wang, D L Quintero-Castro, S Zherlitsyn, S Yasin, Y Skourski, A T M N Islam, B Lake, J Deisenhofer, A Loidl
This corrects the article DOI: 10.1103/PhysRevLett.116.147201.
October 28, 2016: Physical Review Letters
April W Armstrong, Delfina Guadalupe Villanueva Quintero, Cristina M Echeverría, Yihua Gu, Mahinda Karunaratne, Ofelia Reyes Servín
BACKGROUND: Psoriasis severity and treatment responsiveness vary by body region, which differentially impacts quality of life (QoL). OBJECTIVE: The objective of the study was to examine adalimumab efficacy by body region and regional response and QoL relationship. METHODS: Patients (n = 1212) with moderate-to-severe psoriasis were randomized 2:1 to 80 mg at week 0, followed by adalimumab 40 mg or placebo every other week for 16 weeks in the double-blind REVEAL study...
December 2016: American Journal of Clinical Dermatology
Weilin Lin, Frank Erdmann, Andres Quintero, Gunter Fischer, Yixin Zhang
Single atom substitution of cyclosporin A (CsA) through thioxylation has been used to study the structure-activity relationship of the immunosuppressive complex, involving the CsA receptor protein cyclophilin 18 (Cyp18) and the immunological target protein phosphatase calcineurin (CaN), illustrating the contributions of peptide backbone in protein-drug interaction. Moreover, the subtle difference between thioxylation positions in CsA has led to a remarkable change in the quenching effect on Cyp18 intrinsic fluorescence...
October 17, 2016: Bioorganic & Medicinal Chemistry Letters
Porfirio Quintero-Cadena, Paul W Sternberg
Enhancers physically interact with transcriptional promoters, looping over distances that can span multiple regulatory elements. Given that enhancer-promoter (EP) interactions generally occur via common protein complexes, it is unclear whether EP pairing is predominantly deterministic or proximity guided. Here we present cross-organismic evidence suggesting that most EP pairs are compatible, largely determined by physical proximity rather than specific interactions. By re-analyzing transcriptome datasets, we find that the transcription of gene neighbors is correlated over distances that scale with genome size...
October 31, 2016: G3: Genes—Genomes—Genetics
Edgar Quinteros, Alexandre Ribó, Roberto Mejía, Alejandro López, Wilfredo Belteton, Aimee Comandari, Carlos M Orantes, Ernesto B Pleites, Carlos E Hernández, Dina L López
Pesticide handling in farming activities involves substantial hazards for the rural population and for the environment. In Latin America, it is estimated that the population at risk of being affected by heavy metals is over 4 million. This research describes the different types of exposure to pesticides and heavy metals in a rural population (Loma del Gallo), considering both environmental and occupational exposure. This study consists of an inspection in a former pesticide factory (QUIMAGRO), analysis of heavy metals in samples from surface and ground water in the community close to the factory, and a survey to the local population about their perceptions of pesticide exposures...
October 28, 2016: Environmental Science and Pollution Research International
Rodrigo Arreola, Samantha Alvarez-Herrera, Gilberto Pérez-Sánchez, Enrique Becerril-Villanueva, Carlos Cruz-Fuentes, Enrique Octavio Flores-Gutierrez, María Eugenia Garcés-Alvarez, Dora Luz de la Cruz-Aguilera, Emilio Medina-Rivero, Gabriela Hurtado-Alvarado, Saray Quintero-Fabián, Lenin Pavón
Dopamine (DA), a neurotransmitter in the central nervous system (CNS), has modulatory functions at the systemic level. The peripheral and central nervous systems have independent dopaminergic system (DAS) that share mechanisms and molecular machinery. In the past century, experimental evidence has accumulated on the proteins knowledge that is involved in the synthesis, reuptake, and transportation of DA in leukocytes and the differential expression of the D1-like (D1R and D5R) and D2-like receptors (D2R, D3R, and D4R)...
2016: Journal of Immunology Research
Antonino Baez-Rogelio, Yolanda Elizabeth Morales-García, Verónica Quintero-Hernández, Jesús Muñoz-Rojas
In this Crystal Ball we describe the negative effects of the scheme of intensive agriculture of the green revolution technology. To recover the contaminated soils derived from intensive farming is necessary introduce new successful technologies to replace the use of chemical fertilizer and toxic pesticides by organic fertilizers and biological control agents. Our principal speculation is that in a short time authors in the field of PGPB and bioremediation will be expanding the knowledge on the development of different formulations containing super-bacteria or a mixture of super-bacteria able to provide beneficial effect for agriculture and bioremediation...
October 28, 2016: Microbial Biotechnology
Susan Sierau, Tilman Brand, Jody Todd Manly, Andrea Schlesier-Michel, Annette M Klein, Anna Andreas, Leonhard Quintero Garzón, Jan Keil, Martin J Binser, Kai von Klitzing, Lars O White
Practitioners and researchers alike face the challenge that different sources report inconsistent information regarding child maltreatment. The present study capitalizes on concordance and discordance between different sources and probes applicability of a multisource approach to data from three perspectives on maltreatment-Child Protection Services (CPS) records, caregivers, and children. The sample comprised 686 participants in early childhood (3- to 8-year-olds; n = 275) or late childhood/adolescence (9- to 16-year-olds; n = 411), 161 from two CPS sites and 525 from the community oversampled for psychosocial risk...
October 26, 2016: Child Maltreatment
Carlos Vila, Lucia Quintero, Gonzalo Blay, M Carmen Muñoz, José R Pedro
An efficient organocatalytic asymmetric synthesis of α-hydroxyketones has been developed. Quinine-derived thiourea catalyzed the enantioselective Friedel-Crafts alkylation of naphthols and activated phenols with aryl- and alkylglyoxal hydrates, providing the corresponding chiral α-hydroxyketones with high yields (up to 97%) and excellent enantioselectivities (up to 99% ee).
October 25, 2016: Organic Letters
María Benlloch-González, José Manuel Quintero, María Paz Suárez, Rosa Sánchez-Lucas, Ricardo Fernández-Escobar, Manuel Benlloch
There is little information about the prolonged effect of a moderately high temperature on the growth of olive (Olea europaea L.). It has been suggested that when the temperature of the air rises above 35°C the shoot growth of olive is inhibited while there is any reference on how growth is affected when the soil is warmed. In order to examine these effects, mist-cuttings and young plants generated from seeds were grown under moderate high temperature (37°C) for 64 and 42days respectively. In our study, plant dry matter accumulation was reduced when the temperature of both the air and the root medium was moderately high...
December 1, 2016: Journal of Plant Physiology
Letícia Couto Garcia, Danilo Bandini Ribeiro, Fabio de Oliveira Roque, Jose Manuel Ochoa-Quintero, William F Laurance
In November 2015, a large mine-tailing dam owned by Samarco Corporation collapsed in Brazil, generating a massive wave of toxic mud that spread down the Doce River, killing 19 people and affecting biodiversity across hundreds of kilometers of river, riparian lands, and Atlantic coast. Besides the disaster's serious human and socioeconomic tolls, we estimate the regional loss of environmental services to be ~US$5.21 billion/year. Although our estimate is conservative, it is still six times higher than the fine imposed on Samarco by Brazilian environmental authorities...
October 22, 2016: Ecological Applications: a Publication of the Ecological Society of America
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