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https://www.readbyqxmd.com/read/28549378/multi-layer-snse-nanoflake-field-effect-transistors-with-low-resistance-au-ohmic-contacts
#1
Sang-Hyeok Cho, Kwanghee Cho, No-Won Park, Soonyong Park, Jung-Hyuk Koh, Sang-Kwon Lee
We report p-type tin monoselenide (SnSe) single crystals, grown in double-sealed quartz ampoules using a modified Bridgman technique at 920 °C. X-ray powder diffraction (XRD) and energy dispersive X-ray spectroscopy (EDX) measurements clearly confirm that the grown SnSe consists of single-crystal SnSe. Electrical transport of multi-layer SnSe nanoflakes, which were prepared by exfoliation from bulk single crystals, was conducted using back-gated field-effect transistor (FET) structures with Au and Ti contacts on SiO2/Si substrates, revealing that multi-layer SnSe nanoflakes exhibit p-type semiconductor characteristics owing to the Sn vacancies on the surfaces of SnSe nanoflakes...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28548905/brca-associated-cancers-role-of-imaging-in-screening-diagnosis-and-management
#2
Michelle V Lee, Venkata S Katabathina, Michyla L Bowerson, Marina I Mityul, Anup S Shetty, Khaled M Elsayes, Aparna Balachandran, Priya R Bhosale, Ann E McCullough, Christine O Menias
Harmful mutations of the BRCA tumor suppressor genes result in a greater lifetime risk for malignancy-breast and ovarian cancers in particular. An increased risk for male breast, fallopian tube, primary peritoneal, pancreatic, prostate, and colon cancers also has been reported. The BRCA gene is inherited in an autosomal dominant pattern and tends to be highly penetrant; thus, there is an increased incidence of these cancers in affected families. Compared with sporadic tumors, BRCA-associated malignancies have unique manifestations, clinical features, and pathologic profiles...
May 26, 2017: Radiographics: a Review Publication of the Radiological Society of North America, Inc
https://www.readbyqxmd.com/read/28546993/nationwide-genetic-analysis-for-molecularly-unresolved-cystic-fibrosis-patients-in-a-multiethnic-society-implications-for-preconception-carrier-screening
#3
Doron M Behar, Ori Inbar, Michal Shteinberg, Michal Gur, Huda Mussaffi, David Shoseyov, Moshe Ashkenazi, Soliman Alkrinawi, Concetta Bormans, Fahed Hakim, Meir Mei-Zahav, Malena Cohen-Cymberknoh, Adi Dagan, Dario Prais, Ifat Sarouk, Patrick Stafler, Bat El Bar Aluma, Gidon Akler, Elie Picard, Micha Aviram, Ori Efrati, Galit Livnat, Joseph Rivlin, Lea Bentur, Hannah Blau, Eitan Kerem, Amihood Singer
BACKGROUND: Preconception carrier screening for cystic fibrosis (CF) is usually performed using ethnically targeted panels of selected mutations. This has been recently challenged by the use of expanded, ethnically indifferent, pan-population panels. Israel is characterized by genetically heterogeneous populations carrying a wide range of CFTR mutations. To assess the potential of expanding the current Israeli preconception screening program, we sought the subset of molecularly unresolved CF patients listed in the Israeli CF data registry comprising ~650 patients...
May 2017: Molecular Genetics & Genomic Medicine
https://www.readbyqxmd.com/read/28545452/a-simple-fast-and-inexpensive-method-for-mutation-scanning-of-cftr-gene
#4
Juan Emilio Figueredo Lago, Anny Armas Cayarga, Yaimé Josefina González González, Teresa Collazo Mesa
BACKGROUND: Mutation scanning methods in Cystic Fibrosis Transmembrane Conductance Regulator (CFTR) gene may not distinguish between a Cystic Fibrosis (CF) causing mutation and a benign variant. We have developed a simple and fast method for scanning 14 selected CF-causing mutations which have high frequency in Latin America. METHODS: In a group of 35 samples coming from CF patients previously characterized and using two allele-specific real-time multiplex PCRs targeting wild-type and mutant alleles respectively, we detect the presence of mutations by analyzing the Ct variation...
May 25, 2017: BMC Medical Genetics
https://www.readbyqxmd.com/read/28534900/interplay-between-many-body-effects-and-coulomb-screening-in-the-optical-bandgap-of-atomically-thin-mos2
#5
Youngsin Park, Sang Wook Han, Christopher C S Chan, Benjamin P L Reid, Robert A Taylor, Nammee Kim, Yongcheol Jo, Hyunsik Im, Kwang S Kim
Due to its unique layer-number dependent electronic band structure and strong excitonic features, atomically thin MoS2 is an ideal 2D system where intriguing photoexcited-carrier-induced phenomena can be detected in excitonic luminescence. We perform micro-photoluminescence (PL) measurements and observe that the PL peak redshifts nonlinearly in mono- and bi-layer MoS2 as the excitation power is increased. The excited carrier-induced optical bandgap shrinkage is found to be proportional to n(4/3), where n is the optically-induced free carrier density...
May 23, 2017: Nanoscale
https://www.readbyqxmd.com/read/28533154/preconception-and-prenatal-genetic-counselling
#6
REVIEW
Adonis S Ioannides
Identifying individuals at risk of having children affected by genetic conditions or congenital anomalies allows counselling that aims to inform reproductive decisions. This process takes place either at the preconception or early prenatal stage, although more options are available if risks are identified before the pregnancy. Preconception counselling covers issues that can affect the health of the mother and baby including folic acid supplementation. Carrier screening for autosomal recessive diseases, such as beta thalassaemia, has resulted in a significantly reduced incidence in many countries...
April 21, 2017: Best Practice & Research. Clinical Obstetrics & Gynaecology
https://www.readbyqxmd.com/read/28529116/italian-consensus-guidelines-for-the-management-of-hepatitis-b-virus-infections-in-patients-with-rheumatoid-arthritis
#7
Marco Sebastiani, Fabiola Atzeni, Laura Milazzo, Luca Quartuccio, Carlo Scirè, Giovanni Battista Gaeta, Giovanni Lapadula, Orlando Armignacco, Marcello Tavio, Ignazio Olivieri, Pierluigi Meroni, Laura Bazzichi, Walter Grassi, Alessandro Mathieu, Claudio Mastroianni, Evangelista Sagnelli, Teresa Santantonio, Caterina Uberti Foppa, Massimo Puoti, Loredana Sarmati, Paolo Airò, Oscar Massimiliano Epis, Rossana Scrivo, Miriam Gargiulo, Agostino Riva, Andreina Manfredi, Giovanni Ciancio, Gianguglielmo Zehender, Gloria Taliani, Luca Meroni, Salvatore Sollima, Piercarlo Sarzi-Puttini, Massimo Galli
OBJECTIVES: Hepatitis B (HBV) infection, which is prevalent worldwide, is also frequently seen in patients with rheumatoid arthritis (RA). The Italian Society of Rheumatology (SIR) and the Italian Society of Infectious and Tropical Diseases (SIMIT) endorsed a national consensus process to review the available evidence on HBV management in RA patients and to produce practical, hospital-wide recommendations. METHODS: The consensus panel consisted of infectious disease consultants, rheumatologists and epidemiologists and used the criteria of the Oxford Centre for Evidence-based Medicine to assess the quality of the evidence and the strength of their recommendations...
May 18, 2017: Joint, Bone, Spine: Revue du Rhumatisme
https://www.readbyqxmd.com/read/28525623/the-survey-of-tinea-capitis-and-scalp-dermatophyte-carriage-in-nursing-home-residents
#8
Chien-Yio Lin, Hsiu-Jung Lo, Ming-Gene Tu, Yu-Ming Ju, Yun-Chen Fan, Chih-Chao Lin, Ya-Ting Chiang, Yun-Liang Yang, Kai-Ting Chen, Pei-Lun Sun
Tinea capitis is a contagious dermatophyte infection of scalp and associated hairs. On the other hand, asymptomatic carriage is a status of positive dermatophyte scalp culture, but without signs or symptoms of tinea capitis, and no evidence of hair shaft invasion confirmed by direct microscopy. Tinea capitis and asymptomatic carriage mostly occur in children, but adult females are becoming another population in recent decades. In this study, we focused on the prevalence and related fungi of tinea capitis and asymptomatic carriage in elderly by the shampoo brush method, as well as the source of transmission, in 10 nursing home residents...
May 18, 2017: Medical Mycology: Official Publication of the International Society for Human and Animal Mycology
https://www.readbyqxmd.com/read/28522225/genetic-screening-of-spinal-muscular-atrophy-using-a-real-time-modified-cop-pcr-technique-with-dried-blood-spot-dna
#9
Mawaddah Ar Rochmah, Nur Imma Fatimah Harahap, Emma Tabe Eko Niba, Kenta Nakanishi, Hiroyuki Awano, Ichiro Morioka, Kazumoto Iijima, Toshio Saito, Kayoko Saito, Poh San Lai, Yasuhiro Takeshima, Atsuko Takeuchi, Yoshihiro Bouike, Maya Okamoto, Hisahide Nishio, Masakazu Shinohara
BACKGROUND: Spinal muscular atrophy (SMA) is a common neuromuscular disorder caused by mutations in SMN1. More than 95% of SMA patients carry homozygous SMN1 deletion. SMA is the leading genetic cause of infant death, and has been considered an incurable disease. However, a recent clinical trial with an antisense oligonucleotide drug has shown encouraging clinical efficacy. Thus, early and accurate detection of SMN1 deletion may improve prognosis of many infantile SMA patients. METHODS: A total of 88 DNA samples (37 SMA patients, 12 carriers and 39 controls) from dried blood spots (DBS) on filter paper were analyzed...
May 15, 2017: Brain & Development
https://www.readbyqxmd.com/read/28520953/evolving-insights-into-the-epidemiology-and-control-of-clostridium-difficile-in-hospitals
#10
Daniel A Caroff, Deborah S Yokoe, Michael Klompas
Typing studies suggest most cases of hospital-onset Clostridium difficile infection are unrelated to other cases of active disease in the hospital. New cases may instead be due to transmissions from asymptomatic carriers or progression of latent C.difficile present-on-admission to active infection. Direct exposure to antibiotics remains the primary risk factor for C.difficile infection but ward-level antibiotic use, antibiotic exposure of the prior room occupant, and C.difficile status of the prior room occupant increase risk for C...
May 17, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28518213/relationship-between-toll-like-receptor-2-r753q-and-t16934a-polymorphisms-and-staphylococcus-aureus-nasal-carriage
#11
Maciej Żukowski, Olga Taryma-Leśniak, Mariusz Kaczmarczyk, Katarzyna Kotfis, Łukasz Szydłowski, Andrzej Ciechanowicz, Mirosław Brykczyński, Agnieszka Żukowska
BACKGROUND: The association among specific single-nucleotide polymorphisms (SNPs) in TLR2 R753Q (rs5743708) and T16934A (rs4696480) and the nasal carriage of Staphylococcus aureus was studied in adults before CABG. METHODS: The TLR2 polymorphisms were genotyped in 299 consecutive patients prepared for a CABG operation. Genotyping was performed using restriction fragment length polymorphism (RFLP) analysis of PCR-amplified fragments. Two nasal swab cultures were taken within 2 weeks before the operation...
May 18, 2017: Anaesthesiology Intensive Therapy
https://www.readbyqxmd.com/read/28517016/graphene-as-an-electrode-for-solution-processed-electron-transporting-organic-transistors
#12
Subir Parui, Mário Ribeiro, Ainhoa Atxabal, Roger Llopis, Fèlix Casanova, Luis E Hueso
Organic field-effect transistors (OFETs) are fundamental building blocks for plastic electronics such as organic photovoltaics or bendable displays with organic light emitting diodes, and radio-frequency identification (RFID) tags. A key part in the performance of OFET is the organic material constituting the channel. OFETs based on solution-processed polymers represent a new class of organic electronic devices. Recent developments in upscale solution-processed polymers have advanced towards high throughput, low-cost, and environmentally friendly materials for high-performance applications...
May 18, 2017: Nanoscale
https://www.readbyqxmd.com/read/28515472/carrier-frequency-of-wilson-s-disease-in-the-korean-population-a-dna-based-approach
#13
Ja-Hyun Jang, Taeheon Lee, Sunghee Bang, Young-Eun Kim, Eun-Hae Cho
Wilson's disease (WD) is an autosomal recessive disorder caused by ATP7B gene mutation. The frequency of WD is about 1 in 30 000 worldwide. In the present study, we screened 14 835 dried blood spots (DBSs) from asymptomatic Korean neonates and retrospectively reviewed massively parallel sequencing of 1090 control individuals to estimate carrier frequency. TaqMan real-time PCR assays were conducted to detect six mutations that account for 58.3% of mutations in Korean WD patients: c.2333G>T (p.Arg778Leu), c...
May 18, 2017: Journal of Human Genetics
https://www.readbyqxmd.com/read/28515446/phase-channel-dynamics-reveal-the-role-of-impurities-and-screening-in-a-quasi-one-dimensional-charge-density-wave-system
#14
M D Thomson, K Rabia, F Meng, M Bykov, S van Smaalen, H G Roskos
Charge density waves (CDWs), i.e. the periodic spatial modulation of coupled electronic and lattice density, are ubiquitous in low-dimensional conductors and have taken on renewed relevance due their role in state-of-the-art materials, e.g. high-T c superconductors, topological insulators and low-dimensional carbon. As CDWs are described by a complex order parameter to represent both the amplitude and phase, they are formally analogous to BCS superconductors and spin-waves, providing a prototype of collective phenomena for the further development of field theories and ab-initio calculations of complex solids...
May 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28513235/impact-of-interaction-between-cyp1a1-genetic-polymorphisms-and-smoking-on-coronary-artery-disease-in-the-han-of-china
#15
Dao-Di Peng, Wei Xie, Zai-Xin Yu
AIMS: To investigate the association of CYP1A1 genotype and additional gene-smoking interaction with coronary artery disease (CAD) risk based on a Chinese case-control study. METHODS: A total of 1862 participants (1134 men, 728 women) were selected, including 620 CAD patients and 1242 normal controls. Logistic regression was performed to investigate association of CYP1A1 genotype, gene-gene, and gene-smoking interaction with CAD. Generalized multifactor dimensionality reduction (GMDR) was used to screen the best gene-gene and gene-smoking interaction combination, cross-validation consistency, the testing balanced accuracy, and the sign test, to assess if each selected interaction was calculated...
May 17, 2017: Clinical and Experimental Hypertension: CHE
https://www.readbyqxmd.com/read/28512454/new-insights-into-the-regulation-of-cell-surface-signaling-activity-acquired-from-a-mutagenesis-screen-of-the-pseudomonas-putida-iuty-sigma-anti-sigma-factor
#16
Karlijn C Bastiaansen, Cristina Civantos, Wilbert Bitter, María A Llamas
Cell-surface signaling (CSS) is a signal transfer system that allows Gram-negative bacteria to detect environmental signals and generate a cytosolic response. These systems are composed of an outer membrane receptor that senses the inducing signal, an extracytoplasmic function sigma factor (σ(ECF)) that targets the cytosolic response by modifying gene expression and a cytoplasmic membrane anti-sigma factor that keeps the σ(ECF) in an inactive state in the absence of the signal and transduces its presence from the outer membrane to the cytosol...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28510419/sunlight-promotes-fast-release-of-hazardous-cadmium-from-widely-used-commercial-cadmium-pigment
#17
Huiting Liu, Han Gao, Mingce Long, Heyun Fu, Pedro J J Alvarez, Qilin Li, Shourong Zheng, Xiaolei Qu, Dongqiang Zhu
Cadmium pigments are widely used in the polymer and ceramic industry. Their potential environmental risk is under debate, being the major barrier for appropriate regulation. We show that 83.0 ± 0.2 % of hazardous cadmium ion (Cd2+) was released from the commercial cadmium sulfoselenide pigment (i.e., cadmium red) in aqueous suspension within 24 h under simulated sunlit conditions. This photo-dissolution process also generated sub-20 nm pigment nanoparticles. Cd2+ release is attributed to the reactions between photogenerated holes and the pigment lattices...
May 16, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28505178/a-reverse-dot-blot-assay-for-the-screening-of-twenty-mutations-in-four-genes-associated-with-nshl-in-a-chinese-population
#18
Siping Li, Qi Peng, Shengyun Liao, Wenrui Li, Qiang Ma, Xiaomei Lu
BACKGROUND: Congenital deafness is one of the most distressing disorders affecting humanity and exhibits a high incidence worldwide. Most cases of congenital deafness in the Chinese population are caused by defects in a limited number of genes. A convenient and reliable method for detecting common deafness-related gene mutations in the Chinese population is required. METHODS: We developed a PCR-reverse dot blot (RDB) assay for screening 20 hotspot mutations of GJB2, GJB3, SLC26A4, and MT-RNR1, which are common non-syndromic hearing loss (NSHL)-associated genes in the Chinese population...
2017: PloS One
https://www.readbyqxmd.com/read/28504962/association-of-stat4-and-ptpn22-polymorphisms-and-their-interactions-with-type-1-autoimmune-hepatitis-susceptibility-in-chinese-han-children
#19
Xiaofeng Li, Huiqin Chen, Yun Cai, Pingping Zhang, Zhuanggui Chen
AIMS: To investigate the impact of signal transducer and activator of transcription 4 (STAT4) and the protein tyrosine phosphatase N22 (PTPN22) gene single nucleotide polymorphisms (SNPs), gene- gene interactions and haplotype on type-1 Autoimmune Hepatitis (AIH) risk. RESULTS: Logistic regression analysis showed that type 1 AIH was significantly higher in carriers of T allele of rs7574865 than those with GG genotype (P- value less than 0.001), higher in carriers of C allele of rs7582694 than those with GG genotype (P- value < 0...
April 27, 2017: Oncotarget
https://www.readbyqxmd.com/read/28503568/a-novel-72-t%C3%A2-a-%C3%AE-promoter-mutation-causing-slightly-elevated-hba2-in-a-vietnamese-heterozygote
#20
Monica Pirastru, Paolo Mereu, Chau Quynh Nguyen, Nhan Viet Nguyen, Thang Duy Nguyen, Laura Manca
We report a novel β(+)-thalassemia mutation found in a Vietnamese family. The molecular defect T→A lies at -72 of the β-globin gene promoter, within the conserved CCAAT box. The index case was a 5-year-old child having red blood cells indices close to normal and slightly increased level of HbA2 (3.96%). The expression of the mutated β allele was inferred by luciferase reporter assay in K562 cells. The β -72 determinant is the eighth β-thalassemic mutation identified in Vietnam and it was not previously reported in any population...
2017: BioMed Research International
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