128,506 results match your criteria reaction determined

Propofol represses cell growth and metastasis by modulating the circNCAPG/miR-200a-3p/RAB5A axis in glioma.

World Neurosurg 2021 Jun 12. Epub 2021 Jun 12.

Department of Anesthesiology, The First Hospital of Hebei Medicine University, Shijiazhuang, Hebei,050011, P.R. China. Electronic address:

Background: Glioma is a common primary intracranial tumor, with high infiltration and aggression. Propofol (Pro) is associated with growth and metastasis in glioma. Meanwhile, circular RNA non-SMC condensin I complex subunit G (circNCAPG, hsa_circ_0007244) has been reported to be upregulated in glioma. Read More

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Coronavirus Disease-2019 (COVID-19) and Pituitary Apoplexy: A Single-Center Case Series and Review of the Literature.

World Neurosurg 2021 Jun 12. Epub 2021 Jun 12.

Departments of Neurosurgery(,) University of Mississippi Medical Center, Jackson, MS, United States.

Background: Pituitary apoplexy (PA) is a rare but life-threatening condition characterized by pituitary infarction and hemorrhage, most often in the setting of a preexisting adenoma. The risk factors and mechanisms associated with PA are poorly understood. Although neurovascular manifestations of coronavirus disease-19 (COVID-19) infection have been documented, its association with PA is to be determined. Read More

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Intraspecific variations of the cytoplasmic male sterility genes and in Brassica maurorum and Moricandia arvensis, and the specificity of the mRNA processing.

Genome 2021 Jun 15. Epub 2021 Jun 15.

Dept. Biotech., Fac. Eng., Kyoto Sangyo Univ., Motoyama, Kamigamo, Kyoto, Kyoto, Japan, 603-8555;

The mitochondrial gene co-transcribed with and causes cytoplasmic male sterility in crops, is widely distributed across wild species and genera of . However, intraspecific variations in the presence of have not yet been studied, and the mechanisms for the wide distribution of the gene remain unclear. We analyzed the presence and sequence variations of in two wild species, and . Read More

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Clinical and epidemiological aspects of feline sporotrichosis caused by Sporothrix brasiliensis and in vitro antifungal susceptibility.

Vet Res Commun 2021 Jun 15. Epub 2021 Jun 15.

Department of Dermatological, Infectious, and Parasitic Diseases, School of Medicine (FAMERP), São José Do Rio Preto, São José do Rio Preto, Brazil.

Sporotrichosis is a subcutaneous mycosis resulting from the traumatic implantation of pathogenic Sporothrix species. In Brazil, zoonotic transmission plays an important role in the epidemiology of the disease, involving especially cats. The objective of this study was to isolate Sporothrix spp. Read More

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Baicalin attenuates adriamycin-induced nephrotic syndrome by regulating fibrosis procession and inflammatory reaction.

Genes Genomics 2021 Jun 15. Epub 2021 Jun 15.

Traditional Chinese Medicine Department of Rheumatism, Huazhong University of Science and Technology Union Shenzhen Hospital (Nanshan Hospital), 89 Taoyuan Road, Nanshan District, Shenzhen, 518052, Guangdong, China.

Background: Baicalin has anti-inflammatory, antibacterial, blood platelet aggregation-inhibiting, free oxygen radical-clearing, and endotoxin-decreasing properties. However, its molecular mechanism involved in the treatment of Adriamycin-induced nephrotic syndrome (NS) is still unclear.

Objective: This study aimed to explore the effects of baicalin on Adriamycin-induced nephrotic syndrome (NS) and to characterize the genes involved in this progression. Read More

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Mitochondrial genome variations are associated with amyotrophic lateral sclerosis in patients from mainland China.

J Neurol 2021 Jun 15. Epub 2021 Jun 15.

Department of Neurology, Xiangya Hospital, Central South University, 87 Xiangya Rd, Changsha, Hunan, People's Republic of China.

Background: Amyotrophic lateral sclerosis (ALS) is a late-onset neurodegenerative disorder. Mitochondrial dysfunction is involved in the complex pathophysiology of ALS; however, the role of mitochondrial DNA (mtDNA) variants in ALS is poorly understood. We aimed to elucidate the role of mtDNA variants in the pathogenesis of ALS. Read More

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Thermal Decomposition of 2-Methyltetrahydrofuran behind Reflected Shock Waves over the Temperature Range of 1179-1361 K.

J Phys Chem A 2021 Jun 15. Epub 2021 Jun 15.

Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, India.

The thermal unimolecular decomposition of 2-methyltetrahydrofuran (2-MTHF) was studied behind reflected shock waves in a single-pulse shock tube over the temperature range of 1179-1361 K and pressure range of 9-17 atm. Methane, ethylene, ethane, 1,3-butadiene, propylene, acetaldehyde, and acetylene were identified as products in the decomposition of 2-MTHF. A reaction scheme was proposed to explain the mechanism for the observed products. Read More

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CircASXL1 knockdown represses the progression of colorectal cancer by downregulating GRIK3 expression by sponging miR-1205.

World J Surg Oncol 2021 Jun 14;19(1):176. Epub 2021 Jun 14.

Department of General Surgery, Shanghai Fengxian Central Hospital, No. 6600, Nanfeng Road, Nanqiao New Town, Fengxian District, Shanghai, 201400, China.

Background: Colorectal cancer (CRC) is a common aggressive tumor that poses a heavy burden to human health. An increasing number of studies have reported that circular RNA (circRNA) is involved in the progression of CRC. In this study, the special profiles of circASXL1 (circ_0001136) in CRC progression were revealed. Read More

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Biodegradation of an essential oil UVCB - Whole substance testing and constituent specific analytics yield biodegradation kinetics of mixture constituents.

Chemosphere 2021 Sep 1;278:130409. Epub 2021 Apr 1.

Technical University of Denmark, Department of Environmental Engineering, Building 115, 2800 Kgs, Lyngby, Denmark. Electronic address:

Testing and assessing the persistency, bioaccumulative and toxic properties of UVCBs (substances of Unknown or Variable composition, Complex reaction products or Biological materials) pose major technical and analytical challenges. The main aim of this study was to combine whole substance biodegradation testing with constituent specific analytics for determining primary biodegradation kinetics of the main UVCB constituents. An additional aim was to link the primary biodegradation kinetics of the main constituents to the bioaccumulation potential and baseline toxicity potential of the UVCB. Read More

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September 2021

Manometric real-time studies of the mechanochemical synthesis of zeolitic imidazolate frameworks.

Chem Sci 2020 Jan 2;11(8):2141-2147. Epub 2020 Jan 2.

Department of Chemistry, McGill University H3A 0B8 Montreal Quebec Canada

We demonstrate a simple method for real-time monitoring of mechanochemical synthesis of metal-organic frameworks, by measuring changes in pressure of gas produced in the reaction. Using this manometric method to monitor the mechanosynthesis of the zeolitic imidazolate framework ZIF-8 from basic zinc carbonate reveals an intriguing feedback mechanism in which the initially formed ZIF-8 reacts with the CO byproduct to produce a complex metal carbonate phase, the structure of which is determined directly from powder X-ray diffraction data. We also show that the formation of the carbonate phase may be prevented by addition of excess ligand. Read More

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January 2020

Enzymes in a golden cage.

Chem Sci 2020 Mar 28;11(15):3965-3977. Epub 2020 Mar 28.

Institute of Chemistry, The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem Jerusalem 9190401 Israel

We describe a general method for the entrapment of enzymes within bulk metallic gold. This is a new approach for the immobilization of enzymes on metals, which is commonly carried out by 2D adsorption or covalent biding, that is, the enzyme is in contact with the metal at a specific contact zone of the enzyme, while most of the rest of it remains exposed to the environment. The 3D metallic encaging of the enzymes is quite different: the enzyme is in contact with the metallic cage walls all around it and is well protected inside. Read More

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Diastereoselective synthesis of chiral 3-substituted isoindolinones rhodium(III)-catalyzed oxidative C-H olefination/annulation.

Org Biomol Chem 2021 Jun 14. Epub 2021 Jun 14.

College of Chemistry, Green Catalysis Center, Zhengzhou University, Zhengzhou 450001, People's Republic of China.

A new method for the direct and stereoselective synthesis of 3-substituted isoindolinones via Rh(iii)-catalyzed chiral N-sulfinyl amide directed asymmetric [4 + 1] annulation of benzamides with acrylic esters has been developed. The reaction proceeded through an oxidative C-H olefination and a subsequent cyclization by intramolecular aza-Michael addition, producing a series of diastereoisomeric chiral isoindolinones (20 examples) in generally good yields with a dr value up to 5.5 : 1. Read More

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Diagnostic accuracy of the interferon-gamma release assay (IGRA) for cases of feline mycobacteriosis.

Prev Vet Med 2021 Jun 8;193:105409. Epub 2021 Jun 8.

The Royal (Dick) School of Veterinary Studies and The Roslin Institute, The University of Edinburgh, Easter Bush, Midlothian, EH25 9RG, United Kingdom.

The aim of this study was to evaluate the sensitivity and specificity of the interferon-gamma release assay (IGRA) for diagnosing infections with members of the Mycobacterium (M.) tuberculosis-complex (MTBC) and non-tuberculous mycobacteria (NTM) in domestic cats, and to generate defined feline-specific cut-off values using receiver operating characteristic (ROC) curve analysis to improve test performance. Records of 594 cats that had been tested by IGRA were explored to identify individuals that had a culture and/or polymerase chain reaction (PCR)-confirmed case of mycobacterial disease, and those that had a final diagnosis of non-mycobacterial disease. Read More

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Platelet function in patients undergoing surgical and transcatheter aortic valve replacement: a comparative study.

Kardiol Pol 2021 ;79(5):554-561

1st Department of Cardiology, Poznan University of Medical Sciences, Poznań, Poland.

Background: Intervention-induced platelet hypercoagulability may pose a risk of serious adverse events for patients.

Aims: This study aimed to assess whether surgical and transcatheter aortic valve replacement (SAVR and TAVR) differ in periprocedural platelet activity.

Methods: The total number of 24 patients with a mean age (SD) of 71 (13) years who underwent SAVR (n = 12) or TAVR (n = 12) were recruited for the study. Read More

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January 2021

Formation of diethylamine thermal ionization mass spectrum on NaAu intermetallide.

Rapid Commun Mass Spectrom 2021 Jun 14:e9144. Epub 2021 Jun 14.

Ioffe Physical-Technical Institute of the Russian Academy of Sciences, St. Petersburg, Russia.

Rationale: The mass-spectra of amine thermal ionization on intermetallic NaAu emitters differ significantly from those of the same compounds on the surfaces of transition metals and their oxides. The factors underlying these differences are determined through studying the processes taking place on intermetallic surfaces, which form the corresponding mass spectra.

Methods: The dependence of mass-spectral composition and individual line intensity at diethylamine thermal ionization on intermetallic NaAu surface on diethylamine pressure, oxygen, Na atom current and emitter temperature was studied using the magnet sector mass spectrometer. Read More

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Clinical Prediction Tool to Assess the Likelihood of a Positive SARS-Cov-2 (COVID-19) Polymerase Chain Reaction Test in Patients with Flu-like Symptoms.

West J Emerg Med 2021 Mar 24;22(3):592-598. Epub 2021 Mar 24.

Pontificia Universidad Católica de Chile, Section of Emergency Medicine, Santiago, Chile.

Introduction: The clinical presentation of coronavirus disease 2019 (COVID-19) overlaps with many other common cold and influenza viruses. Identifying patients with a higher probability of infection becomes crucial in settings with limited access to testing. We developed a prediction instrument to assess the likelihood of a positive polymerase chain reaction (PCR) test, based solely on clinical variables that can be determined within the time frame of an emergency department (ED) patient encounter. Read More

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Provider Antibody Serology Study of Virus in the Emergency Room (PASSOVER) Study: Special Population COVID-19 Seroprevalence.

West J Emerg Med 2021 Apr 9;22(3):565-571. Epub 2021 Apr 9.

Children's Hospital of Orange County, Research Institute, Orange, California.

Introduction: Limited data on the seroprevalence of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) among healthcare workers (HCW) are publicly available. In this study we sought to determine the seroprevalence of SARS-CoV-2 in a population of HCWs in a pediatric emergency department (ED).

Methods: We conducted this observational cohort study from April 14-May 13, 2020 in a pediatric ED in Orange County, CA. Read More

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π-Conjugated stannole copolymers synthesised by a tin-selective Stille cross-coupling reaction.

Mater Adv 2021 Mar 27;2(10):3282-3293. Epub 2021 Mar 27.

Institute for Organic and Analytical Chemistry, University of Bremen Leobener Str. 7 28359 Bremen Germany

The synthesis of four well-defined conjugated polymers containing unusual heterocycle units in the main chain, namely stannole units as building blocks, is reported. The stannole-thiophenyl copolymers were generated by tin-selective Stille coupling reactions in nearly quantitative yields of 94% to 98%. NMR data show that the tin atoms in the rings remain unaffected. Read More

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Voltage-Gated Sodium Channel () Mutation-Based Pyrethroid Resistance in Populations of Three Endemic Dengue Risk Areas of Sri Lanka.

Biomed Res Int 2021 22;2021:8874092. Epub 2021 May 22.

Molecular Medicine Unit, Faculty of Medicine, University of Kelaniya, Sri Lanka.

Background: Pyrethroid insecticides are widely used in many countries for chemical-based control of . Regardless of their efficacy, the constant use of insecticides has induced insecticide resistance mechanisms, such as knockdown resistance () in mosquitoes. Sri Lankan Vector Controlling Entities (VCE) have been using a variety of pyrethroid insecticides as the primary approach for dengue control. Read More

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Simulation of the Electrochemical Impedance in a Three-Dimensional, Complex Microstructure of Solid Oxide Fuel Cell Cathode and Its Application in the Microstructure Characterization.

Front Chem 2021 27;9:627699. Epub 2021 May 27.

Department of Materials Science and Engineering, University of Michigan, Ann Arbor, MI, United States.

Electrochemical impedance spectroscopy (EIS) is a powerful technique for material characterization and diagnosis of the solid oxide fuel cells (SOFC) as it enables separation of different phenomena such as bulk diffusion and surface reaction that occur simultaneously in the SOFC. In this work, we simulate the electrochemical impedance in an experimentally determined, three-dimensional (3D) microstructure of a mixed ion-electron conducting (MIEC) SOFC cathode. We determine the impedance response by solving the mass conservation equation in the cathode under the conditions of an AC load across the cathode's thickness and surface reaction at the pore/solid interface. Read More

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Real-life adherence to subcutaneous immunotherapy: What has changed in the era of the COVID-19 pandemic.

World Allergy Organ J 2021 Jun 8:100558. Epub 2021 Jun 8.

Department of Allergy and Clinical Immunology, University of Health Sciences, Atatürk Chest Diseases and Thoracic Surgery Training and Research Hospital, Ankara, Turkey.

Background: Allergen immunotherapy (AIT) must be continued for 3 years, to achieve a long-term modifying effect. Adherence is a key to ensure effectiveness. The objective of this study was, first of all, to evaluate the adherence with subcutaneous immunotherapy (SCIT) and to identify the main causes of SCIT withdrawal in real-life practice in our clinic. Read More

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Clinical presentation and course of the novel coronavirus disease 2019 in patients with various types of cancer: A retrospective case-control analysis of an experienced cancer center in Turkey.

J Cancer Res Ther 2021 Apr-Jun;17(2):556-564

Department of Medical Oncology, University of Health Sciences, Gulhane School of Medicine, Ankara, Turkey.

Objective: Cancers have been reported to worsen the clinical course of coronavirus disease 2019 (COVID-19) infection. We aimed to demonstrate the real-life data on health outcomes in COVID-19-infected cancer patients.

Materials And Methods: We analyzed the data of 43 COVID-19-infected cancer patients in our COVID-19 clinics between March 25, 2020, and May 9, 2020, retrospectively. Read More

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Wnt/β-Catenin signaling pathway participates in the effect of miR-626 on oral squamous cell carcinoma by targeting RASSF4.

J Oral Pathol Med 2021 Jun 14. Epub 2021 Jun 14.

Department of Stomatology, Yantaishan Hospital, Yantai, China.

Background: The role of miR-626 in oral squamous cell carcinoma (OSCC) was investigated by targeting RASSF4.

Methods: MiR-626 and RASSF4 expression was detected in normal oral mucosa or OSCC tissues and OSCC or normal cells. The methylation status of RASSF4 was analyzed using methylation-specific polymerase chain reaction (PCR). Read More

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Insight into the adsorption of europium(III) on muscovite and phlogopite: Effects of pH, electrolytes, humic substances and mica structures.

Chemosphere 2021 Jun 5;282:131087. Epub 2021 Jun 5.

Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-sen University, Zhuhai, 519082, China. Electronic address:

Europium(III), i.e., Eu(III), is chemically analogous to the trivalent lanthanides (Ln) and actinides (An). Read More

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Individual hosts carry H. pylori isolates with different cagA features - motifs and copy number.

Infect Genet Evol 2021 Jun 11;93:104961. Epub 2021 Jun 11.

Department of Microbiology, School of Biology, University College of Sciences, University of Tehran, Tehran, Iran.

Background: H. pylori strains with different genetic contents may infect different or an individual human host. Genetic diversity of cagA is thought to contribute to differences in H. Read More

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Increased regulated on activation, normal T-cell expressed and secreted levels and cysteine-cysteine chemokine receptor 5 upregulation in omental adipose tissue and peripheral blood mononuclear cells are associated with testosterone level and insulin resistance in polycystic ovary syndrome.

Fertil Steril 2021 Jun 9. Epub 2021 Jun 9.

Department of Obstetrics and Gynecology, School of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan; Department of Obstetrics and Gynecology, Shin Kong Wu Ho-Su Memorial Hospital, Taipei, Taiwan. Electronic address:

Objective: To study the relationship between circulating chemokine cysteine-cysteine motif ligand (CCL) 5 levels and cysteine-cysteine chemokine receptor type 5 (CCR5) expression in peripheral blood mononuclear cells (PBMCs) and adipose tissue with hyperandrogenism and insulin resistance in patients with polycystic ovary syndrome (PCOS).

Design: Case-control study.

Setting: University teaching hospital. Read More

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Application of tetrahedral -deoxyribonucleic acid electrochemistry platform coupling aptazymes and hybridized hairpin reactions for the measurement of extracellular adenosine triphosphate in plants.

Anal Chim Acta 2021 Aug 24;1172:338681. Epub 2021 May 24.

Key Laboratory of Bioelectrochemistry & Environmental Analysis of Gansu Province, Northwest Normal University, Lanzhou, 730070, Gansu, China. Electronic address:

Extracellular ATP (eATP) is an important biological signal transduction molecule. Although a variety of detection methods have been extensively used in ATP sensing and analysis, accurate detection of eATP remains difficult due to its extremely low concentration and spatiotemporal distribution. Here, an eATP measurement strategy based on tetrahedral DNA (T-DNA)-modified electrode sensing platform and hybridization chain reaction (HCR) combined with G-quadruplex/Hemin (G4/Hemin) DNAzyme dual signal amplification is proposed. Read More

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Comparison between RT-qPCR for SARS-CoV-2 and expanded triage in sputum of symptomatic and asymptomatic COVID-19 subjects in Ecuador.

BMC Infect Dis 2021 Jun 12;21(1):558. Epub 2021 Jun 12.

Escuela de Ciencias Biológicas e Ingeniería, Universidad Yachay Tech, Hacienda San José s/n, San Miguel de Urcuquí, Ibarra, Ecuador.

Background: The quantitative reverse transcriptase-polymerase chain reaction (RT-qPCR) effectively detects the SARS-COV-2 virus. SARS-CoV-2 Nevertheless, some critical gaps remain in the identification and monitoring of asymptomatic people.

Methods: This retrospective study included 733 asymptomatic and symptomatic COVID-19 subjects, who were submitted to the RT-qPCR test. Read More

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The Mass Transfer Index (MTI): A semi-empirical approach for quantifying transport of solutes in variably saturated porous media.

J Contam Hydrol 2021 May 29;242:103842. Epub 2021 May 29.

Department of Civil and Environmental Engineering, Colorado School of Mines, Golden, CO 80401, United States of America. Electronic address:

The processes impacting solute transport through unsaturated porous media have been receiving renewed attention due to their relevance to the transport of emerging contaminants. A set of well-monitored and highly controlled experiments in sand columns were conducted to determine the effect of partial saturation on conservative solute breakthrough in porous media. The results suggest traditional transport parameter estimation methods inadequately account for the pore-scale processes of mass transfer to the immobile zones and the effects of partial saturation on advective transport, even for conservative tracers. Read More

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MiR-124 protects against cognitive dysfunction induced by sevoflurane anesthesia in vivo and in vitro through targeting calpain small subunit 1 via NF-κB signaling pathway.

Adv Clin Exp Med 2021 Jun 11. Epub 2021 Jun 11.

Department of Anesthesiology, The Third Hospital of Hebei Medical University, Shijiazhuang, China.

Background: Postoperative cognitive dysfunction (POCD) is an impairment of cognition that affects post-surgery patients. Sevoflurane anesthesia is linked to cognitive dysfunction correlated to the expression of miRNA levels.

Objectives: In the current study, we investigated if miR-124 can offer protection against cognitive deficits induced by sevoflurane in a spatial learning paradigm, and examined the molecular mechanisms through cell cultures. Read More

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