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https://www.readbyqxmd.com/read/28738556/development-of-a-new-sample-preparation-method-based-on-liquid-liquid-liquid-extraction-combined-with-dispersive-liquid-liquid-microextraction-and-its-application-on-unfiltered-samples-containing-high-content-of-solids
#1
Mir Ali Farajzadeh, Maryam Abbaspour
A new sample preparation method based on liquid-liquid-liquid extraction combined with dispersive liquid-liquid microextraction followed by gas chromatography-flame ionization detection has been reported for the extraction/preconcentration and determination of trace levels of twelve pesticide residues from different samples with high content of solids without filtration. This method consists of a three-phase system including an aqueous phase (sample solution), acetonitrile, and hexane. The extraction mechanism is based on different affinities of the substances from the sample matrices towards each of the involved phase, which provides a high selectivity to the process...
November 1, 2017: Talanta
https://www.readbyqxmd.com/read/28737241/factors-associated-with-the-severity-of-premenstrual-syndrome-among-iranian-college-students
#2
Maryam Farahmand, Fahimeh Ramezani Tehrani, Davood Khalili, Gholamreza Amin, Reza Negarandeh
AIM: Premenstrual syndrome (PMS) is characterized by physical, cognitive, and behavioral symptoms that occur cyclically, from several days to 2 weeks before menses, which resolve either quickly or during the early days of menstruation. The aim of this study was to determine the factors associated with the severity of PMS in Iranian college students. METHODS: The cross-sectional study was performed among 298 college students (aged 18-35 years) with PMS, of whom, 271 college students completed the Iranian version of the Premenstrual Symptoms Screening Tool questionnaire to determine the severity of PMS...
July 24, 2017: Journal of Obstetrics and Gynaecology Research
https://www.readbyqxmd.com/read/28736850/progressive-ataxia-and-palatal-tremor-two-autopsy-cases-of-a-novel-tauopathy
#3
Andrew F Gao, Achinoam Faust-Socher, Maryam Al-Murshed, Marc R Del Bigio, Anthony E Lang, David G Munoz
BACKGROUND: Sporadic progressive ataxia and palatal tremor is a rare syndrome characterized by mid- to late-adult-onset symptomatic palatal tremor and slowly progressive cerebellar ataxia. To date, there has been only one autopsy report, which described a novel 4-repeat tauopathy with hypertrophic olivary degeneration and tau-positive inclusions in olivary neurons and dystrophic neuritic processes termed glomeruloid bodies. We report on 2 additional autopsy cases. METHODS: Sections from selected paraffin-embedded brain regions were stained with hematoxylin and eosin/Luxol fast blue and processed for phosphorylated tau, 3-repeat tau, 4-repeat tau, neurofilament, glial fibrillary acid protein, phosphorylated α-synuclein, phosphorylated TAR DNA-binding protein 43, beta-amyloid, and p62 immunohistochemistry...
July 24, 2017: Movement Disorders: Official Journal of the Movement Disorder Society
https://www.readbyqxmd.com/read/28736690/decellularization-of-human-internal-mammary-artery-biomechanical-properties-and-histopathological-evaluation
#4
Abdol-Mohammad Kajbafzadeh, Reza Khorramirouz, Seyede Maryam Kameli, Javad Hashemi, Amin Bagheri
This study undertook to create small-diameter vascular grafts and assess their structure and mechanical properties to withstand arterial implantation. Twenty samples of intact human internal mammary arteries (IMAs) were collected and decellularized using detergent-based methods. To evaluate residual cellular and extracellular matrix (ECM) components, histological analysis was performed. Moreover, collagen typing and ECM structure were analyzed by Picrosirius red and Movat's pentachrome staining. Scanning electron microscopy was also applied to assess microarchitecture of both endothelial and adventitial surfaces of native and decellularized arterial samples...
2017: BioResearch Open Access
https://www.readbyqxmd.com/read/28735828/investigation-of-dietary-supplements-prevalence-as-complementary-therapy-comparison-between-hospitalized-psoriasis-patients-and-non-psoriasis-patients-correlation-with-disease-severity-and-quality-of-life
#5
Hadis Yousefzadeh, Mahmoud Mahmoudi, Mahnaz Banihashemi, Maryam Rastin, Farahzad Jabbari Azad
OBJECTIVES: Psoriasis patients are often displeased with traditional medical treatments and they may self-prescribe dietary supplements as an alternative or complementary treatments. We aimed to investigate the prevalence of self-medication of dietary supplements among psoriasis and non-psoriasis cases and its impact on disease severity and quality of life. DESIGN AND SETTING: This case-control study evaluated 252 records of psoriasis patients and 245 non-psoriasis cases...
August 2017: Complementary Therapies in Medicine
https://www.readbyqxmd.com/read/28735616/research-techniques-made-simple-an-introduction-to%C3%A2-use-and-analysis-of-big-data-in-dermatology
#6
Mackenzie R Wehner, Katherine A Levandoski, Martin Kulldorff, Maryam M Asgari
Big data is a term used for any collection of datasets whose size and complexity exceeds the capabilities of traditional data processing applications. Big data repositories, including those for molecular, clinical, and epidemiology data, offer unprecedented research opportunities to help guide scientific advancement. Advantages of big data can include ease and low cost of collection, ability to approach prospectively and retrospectively, utility for hypothesis generation in addition to hypothesis testing, and the promise of precision medicine...
August 2017: Journal of Investigative Dermatology
https://www.readbyqxmd.com/read/28735055/molecular-analysis-of-virulence-genes-and-the-accessory-gene-regulator-agr-types-among-methicillin-resistant-staphylococcus-aureus-mrsa-strains
#7
Sara Cheraghi, Leyla Pourgholi, Maryam Shafaati, Shirinsadat Hashemi Fesharaki, Arash Jalali, Rahim Nosrati, MohammadAli Boroumand
OBJECTIVES: Methicillin resistant S. aureus (MRSA) strains are a main cause of hospital-acquired infections and are considered as a serious public-health concern. MRSA isolates have plenty of virulence factors, which are the basis for its pathogenicity. The controlling and coordination of the expression of these genes perform by the accessory gene regulator (agr). The aim of this study was to determine the rate of some virulence genes encoding the enterotoxin, exfoliative toxin genes (eta), the adhesin genes and identification of agr specificity groups in MRSA isolates...
July 19, 2017: Journal of Global Antimicrobial Resistance
https://www.readbyqxmd.com/read/28735002/immobilization-of-%C3%AE-galactosidase-on-surface-modified-cobalt-multiwalled-carbon-nanotube-nanocomposite-improves-enzyme-stability-and-resistance-to-inhibitor
#8
Maryam Khan, Qayyum Husain, Rani Bushra
The present study aimed to work out a high yield procedure for immobilization of Aspergillus oryzae β-galactosidase on polyaniline cobalt multiwalled carbon nanotubes nanocomposite (PANI/Co/MWCNTNC) by physical adsorption and covalent attachment via glutaraldehyde. The binding was confirmed by scanning and transmission electron microscopy along with Fourier transform-infrared spectroscopy. The immobilization yields obtained for adsorbed and cross-linked enzymes were 93% and 97%, respectively. The covalently immobilized enzyme was remarkably more stable at extremes of pH and temperature compared to native and adsorbed enzymes...
July 19, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28734274/genetic-analysis-of-iranian-patients-with-familial-hypercholesterolemia
#9
Mahdis Ekrami, Maryam Torabi, Soudeh Ghafouri-Fard, Javad Mowla, Bahram Mohammad Soltani, Feyzollah Hashemi-Gorji, Zahra Mohebbi, Mohammad Miryounesi
Background: Familial hypercholesterolemia (FH) is a frequent autosomal dominant disorder of lipoprotein metabolism. This disorder is generally caused by mutations in low-density lipoprotein receptor (LDLR), apolipoprotein B 100 (APOB), and proprotein convertase subtilisin/kexin type 9 (PCSK9) genes. In the present study, we aimed at identifying the common LDLR and APOB gene mutations in an Iranian population. Methods: Eighty unrelated Iranian patients with FH entered the study, based on Simon Broome diagnostic criteria...
July 23, 2017: Iranian Biomedical Journal
https://www.readbyqxmd.com/read/28734096/association-of-toxoplasma-gondii-infection-with-schizophrenia-and-its-relationship-with-suicide-attempts-in-these-patients
#10
Maryam Ansari-Lari, Hassan Farashbandi, Fahimeh Mohammadi
OBJECTIVES: To investigate the association of schizophrenia and T. gondii, and to assess the association of infection with suicide attempts and age of onset of schizophrenia in these patients. METHODS: Case-control study Fars Province, southern Iran. Cases were individuals with psychiatric diagnosis of schizophrenia as per Diagnostic and Statistical Manual of Mental Disorders (DSM-IV) criteria. Controls were healthy blood donors, frequency matched with patients according to age and sex...
July 22, 2017: Tropical Medicine & International Health: TM & IH
https://www.readbyqxmd.com/read/28733657/a-gene-network-regulated-by-fgf-signalling-during-ear-development
#11
Maryam Anwar, Monica Tambalo, Ramya Ranganathan, Timothy Grocott, Andrea Streit
During development cell commitment is regulated by inductive signals that are tightly controlled in time and space. In response, cells activate specific programmes, but the transcriptional circuits that maintain cell identity in a changing signalling environment are often poorly understood. Specification of inner ear progenitors is initiated by FGF signalling. Here, we establish the genetic hierarchy downstream of FGF by systematic analysis of many ear factors combined with a network inference approach. We show that FGF rapidly activates a small circuit of transcription factors forming positive feedback loops to stabilise otic progenitor identity...
July 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28732973/enhanced-photodegradation-of-dye-in-waste-water-using-iron-vanadate-nanocomposite-ultrasound-assisted-preparation-and-characterization
#12
Maryam Ghiyasiyan-Arani, Masoud Salavati-Niasari, Sara Naseh
The paper proposes a new approach to Schiff-base ligand assisted sonochemical synthesis of iron vanadate. In this disquisition, we tried to comparing various factors and reaction condition on morphology, size and uniformity of as-obtained samples. Some parameters including Schiff-base capping agent (Bis(acetylacetone) ethylenediamine=H2acacen), electrolyte (NH4F), solvent and reaction time were investigated to reach optimum condition. XRD, FT-IR, EDS, SEM and TEM were used in order to determine purity and structural morphology of as-synthesized products...
November 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28732927/ultrasound-promoted-dispersive-micro-solid-phase-extraction-of-trace-anti-hypertensive-drugs-from-biological-matrices-using-a-sonochemically-synthesized-conductive-polymer-nanocomposite
#13
Maryam Hemmati, Maryam Rajabi, Alireza Asghari
In this work, a rapid and efficient procedure named ultrasound meliorated dispersive micro solid-phase extraction followed by high performance liquid chromatography-ultra violet detection (US-D-μSPE-HPLC-UV) was developed for the pre-concentration of the main trace anti-hypertensive drugs in complex matrices. The basis of this procedure was a polypyrrole-sodium dodecylbenzenesulfonate/zinc oxide (PPy-DBSNa/ZnO) nanocomposite. It was readily synthesized by the impressive way of in situ sonochemical oxidative polymerization in the presence of some additives such as FeCl3 and DBSNa, ultimately leading to the effective coating of PPy on the ZnO nanoparticle cores...
November 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28732600/hierarchy-and-plasticity-in-the-intestinal-stem-cell-compartment
#14
REVIEW
Maryam Yousefi, Linheng Li, Christopher J Lengner
Somatic stem cells maintain tissue homeostasis by organizing themselves in such a way that they can maintain proliferative output while simultaneously protecting themselves from DNA damage that may lead to oncogenic transformation. There is considerable debate about how such stem cell compartments are organized. Burgeoning evidence from the small intestine and colon provides support for a two-stem cell model involving an actively proliferating but injury-sensitive stem cell and a rare, injury-resistant pool of quiescent stem cells...
July 18, 2017: Trends in Cell Biology
https://www.readbyqxmd.com/read/28732430/bee-pollen-flavonoids-as-a-therapeutic-agent-in-allergic-and-immunological-disorders
#15
Masoomeh Jannesar, Maryam Sharif Shoushtari, Ahmad Majd, Zahra Pourpak
Bee pollen grains, as the male reproductive part of seed-bearing plants contain considerable concentrations of various phytochemicals and nutrients. Since antiquity, people throughout the world used pollens to cure colds, flu, ulcers, premature aging, anemia and colitis. It is now well-documented that some bee pollen secondary metabolites (e.g. flavonoid) may have positive health effects. In recent years, the flavonoids have attracted much interest because of their wide range of biological properties and their beneficial effects on human health...
June 2017: Iranian Journal of Allergy, Asthma, and Immunology
https://www.readbyqxmd.com/read/28732161/an-elegant-ph-responsive-nanovehicle-for-drug-delivery-based-on-triazine-dendrimer-modified-magnetic-nanoparticles
#16
Amir Landarani-Isfahani, Majid Moghadam, Shima Mohammadi, Maryam Royvaran, Naimeh Moshtael-Arani, Saghar Rezaei, Shahram Tangestaninejad, Valiollah Mirkhani, Iraj Mohammadpoor-Baltork
Owing to properties of magnetic nanoparticles and elegant three-dimensional macromolecule architectural features, dendrimeric structures have been investigated as nanoscale drug delivery systems. In this paper, a novel magnetic nanocarrier, generation two (G2) triazine dendrimer modified Fe3O4@SiO2 magnetic nanoparticles (MNP-G2), was designed, fabricated and characterized by Fourier transform infrared (FT-IR), thermal gravimetric analysis (TGA), vibrating sample magnetometer (VSM), field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM) and dynamic light scattering (DLS)...
July 21, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28731592/arginase-activity-of-leishmania-isolated-from-patients-with-cutaneous-leishmaniasis
#17
Alireza Badirzadeh, Tahereh Taheri, Fatemeh Abedi-Astaneh, Yasaman Taslimi, Zahra Abdossamadi, Hossein Montakhab-Yeganeh, Maryam Aghashahi, Maryam Niyyati, Sima Rafati
Cutaneous leishmaniasis (CL) is one of the most important vector-borne parasitic diseases, highly endemic in Iran, and its prevalence is increasing all over the country. Arginase (ARG) activity in isolated Leishmania parasites from CL patients is yet to be explored. This study aimed to compare the ARG activity of isolated Leishmania promastigotes from CL patients with a standard strain of L. major and its influences on the disease pathogenesis. We recruited 16 confirmed CL patients from Qom province, in central Iran; after detection of Leishmania species using PCR-RFLP, we assessed the levels of ARG in the isolated promastigotes and determined the parasites' growth rate...
July 21, 2017: Parasite Immunology
https://www.readbyqxmd.com/read/28731561/association-of-glycaemic-index-and-glycaemic-load-with-metabolic-syndrome-in-an-iranian-adult-population-isfahan-healthy-heart-program
#18
Noushin Mohammadifard, Marjan Mansourian, Firouzeh Sajjadi, Maryam Maghroun, Ali Pourmoghaddas, Narges Yazdekhasti, Nizal Sarrafzadegan
AIM: There is controversy around the clinical effects of the dietary glycaemic index (GI) and glycaemic load (GL) on cardiovascular diseases risk factors such as metabolic syndrome (MetS). So, the present study was performed to evaluate the relationship between GI or GL and metabolic syndrome in an Iranian adult population in 2007. METHODS: The study was based on data from a sub-sample of the Isfahan Healthy Heart Program (IHHP), collected across three cities in central Iran, in the year 2007...
February 2017: Nutrition & Dietetics: the Journal of the Dietitians Association of Australia
https://www.readbyqxmd.com/read/28730681/histone-variants-expression-in-peripheral-blood-mononuclear-cells-of-patients-with-rheumatoid-arthritis
#19
Maryam Asadipour, Vahideh Hassan-Zadeh, Naheed Aryaeian, Farhad Shahram, Mahdi Mahmoudi
AIM: The purpose of the present study was to analyze the expression of four histone variants, implicated in the regulation of gene expression, in peripheral blood mononuclear cell (PBMC) samples of patients with rheumatoid arthritis and healthy controls. METHOD: We analyzed the expression of three genes encoding histone variants H3.3, H2A.Z, macroH2A1.1 and macroH2A1.2 in PBMC samples of 50 patients with RA, diagnosed according to American College of Rheumatology (ACR) criteria, and 51 matched healthy controls using SYBR green real-time polymerase chain reaction...
July 21, 2017: International Journal of Rheumatic Diseases
https://www.readbyqxmd.com/read/28729544/remarkable-hexafunctional-anion-receptor-with-operational-urea-based-inner-cleft-and-thiourea-based-outer-cleft-novel-design-with-high-efficiency-for-sulfate-binding
#20
Maryam Emami Khansari, Ali Mirchi, Avijit Pramanik, Corey R Johnson, Jerzy Leszczynski, Md Alamgir Hossain
The recognition of anions by designed receptors has attracted much attention in recent days. In particular, the selective binding of sulfate with artificial receptors is important because of its relevance to many biological and environmental applications. However, the development of organized molecular receptors with high-efficiency for sulfate binding still remains a significant challenge. We report a novel para-phenylene-bridged hexafunctional tripodal receptor that contains a urea-based inner cleft and a thiourea-based outer cleft, providing perfect sites for step-wise binding of two anions within a single cavity...
July 20, 2017: Scientific Reports
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