keyword
MENU ▼
Read by QxMD icon Read
search

twin

keyword
https://www.readbyqxmd.com/read/27910841/incommensurate-density-modulation-in-a-na-rich-plagioclase-feldspar-z-contrast-imaging-and-single-crystal-x-ray-diffraction-study
#1
Huifang Xu, Shiyun Jin, Bruce C Noll
Plagioclase feldspars are the most abundant mineral in the Earth's crust. Intermediate plagioclase feldspars commonly display incommensurately modulated or aperiodic structures. Z-contrast images show both Ca-Na ordering and density modulation. The local structure of lamellae domains has I1-like symmetry. The neighboring lamellae domains are in an inversion twinning relationship. With a state-of-the-art X-ray diffraction unit, second-order satellite reflections (f-reflections) are observed for the first time in andesine (An45), a Na-rich e-plagioclase...
December 1, 2016: Acta Crystallographica Section B, Structural Science, Crystal Engineering and Materials
https://www.readbyqxmd.com/read/27909831/the-2017-international-workshop-on-statistical-genetic-methods-for-human-complex-traits-formerly-the-methodology-of-twin-and-family-studies-advanced-workshop-march-6th-march-10th-2017
#2
https://www.readbyqxmd.com/read/27909830/the-inventory-of-callous-unemotional-traits-icu-in-children-reliability-and-heritability
#3
Ashlee A Moore, Dever Carney, Elizabeth Moroney, Laura Machlin, Kenneth E Towbin, Melissa A Brotman, Daniel S Pine, Ellen Leibenluft, Roxann Roberson-Nay, John M Hettema
Callous-unemotional (CU) traits comprise the core symptoms of psychopathy, yet no study has estimated the heritability of CU traits in a community sample of children using an instrument designed solely to assess CU traits. The current study uses data from 339 twin pairs aged 9-14 to examine the reliability and heritability of the parent-report Inventory of Callous-unemotional Traits (ICU) at two assessments approximately 3 weeks apart. Time-specific measurement error was taken into account to obtain a more accurate estimate of the heritability reflecting the latent liability to CU traits...
December 1, 2016: Behavior Genetics
https://www.readbyqxmd.com/read/27909437/differentially-methylated-dna-regions-in-monozygotic-twin-pairs-discordant-for-rheumatoid-arthritis-an-epigenome-wide-study
#4
Anders J Svendsen, Kristina Gervin, Robert Lyle, Lene Christiansen, Kirsten Kyvik, Peter Junker, Christian Nielsen, Gunnar Houen, Qihua Tan
OBJECTIVES: In an explorative epigenome-wide association study (EWAS) to search for gene independent, differentially methylated DNA positions and regions (DMRs) associated with rheumatoid arthritis (RA) by studying monozygotic (MZ) twin pairs discordant for RA. METHODS: Genomic DNA was isolated from whole blood samples from 28 MZ twin pairs discordant for RA. DNA methylation was measured using the HumanMethylation450 BeadChips. Smoking, anti-cyclic citrullinated peptide antibodies, and immunosuppressive treatment were included as covariates...
2016: Frontiers in Immunology
https://www.readbyqxmd.com/read/27908245/perfect-hemihedral-twinning-in-crystals-of-the-%C3%AE-subunit-of-translation-initiation-factor-2-from-sulfolobus-solfataricus-cause-and-effect
#5
O V Kravchenko, O S Nikonov, N A Nevskaya, E A Stolboushkina, V I Arkhipova, M B Garber, S V Nikonov
The crystal structure of the γ-subunit of translation initiation factor 2 from the archaeon Sulfolobus solfataricus (SsoIF2γ) has been solved based on perfectly hemihedral twinned data. The protein was cocrystallized with the 10-fold molar excess of GTP analog (GDPCP) over protein. However, no nucleotide was found in the structure, and the model demonstrated the apo form of the protein. Two slightly different molecules in the asymmetric unit of the crystal are related by the non-crystallographic 2-fold axis and form a tightly associated dimer...
October 2016: Biochemistry. Biokhimii︠a︡
https://www.readbyqxmd.com/read/27907899/reducing-the-number-of-fetuses-in-a-pregnancy-providers-and-patients-views-of-challenges
#6
Robert L Klitzman
STUDY QUESTION: How do patients and providers perceive and make decisions about possible reductions of multi-fetal pregnancies? SUMMARY ANSWER: Physicians may be transferring additional embryos, assuming that patients will later undergo reduction if need be; but decisions to reduce pregnancies are difficult for patients, who may agree to undergo the procedure in advance and later renege. WHAT IS ALREADY KNOWN: Implanting more than one embryo increases the likelihood that at least one embryo will successfully lead to a child but also that the patient may end up with twins or higher-order multiple births...
November 2016: Human Reproduction
https://www.readbyqxmd.com/read/27907898/obstetrical-and-perinatal-outcomes-following-blastocyst-transfer-compared-to-cleavage-transfer-a-systematic-review-and-meta-analysis
#7
W P Martins, C O Nastri, L Rienzi, S Z van der Poel, C R Gracia, C Racowsky
STUDY QUESTION: Is blastocyst transfer safe when compared to cleavage stage embryo transfer regarding obstetric and perinatal outcomes? SUMMARY ANSWER: The clinical equipoise between blastocyst and cleavage stage embryo transfer remains as the evidence associating blastocyst transfer with some adverse perinatal outcomes is of low/very low quality. WHAT IS KNOWN ALREADY: Extended embryo culture to the blastocyst stage provides some theoretical advantages and disadvantages...
November 2016: Human Reproduction
https://www.readbyqxmd.com/read/27906324/energy-level-systems-and-transitions-of-ho-luag-laser-resonantly-pumped-by-a-narrow-line-width-tm-fiber-laser
#8
Hao Chen, Ting Zhao, Hao Yang, Le Zhang, Tianyuan Zhou, Dingyuan Tang, Chingping Wong, Yung-Fu Chen, Deyuan Shen
We presented a Ho:LuAG ceramic laser in-band pumped by a narrow emission line-width Tm fiber laser at 1907 nm. All of potential transitions between 5I7 and 5I8 manifold were discussed to form the Ho's in-band-pump energy level systems, which were not described in details earlier. For the emission band centered at ~2095 nm, both laser absorption and emission transition separately consisted of two groups were first analyzed and observed. Using output couplers (OCs) with different transmittances (T = 6, 10 and 20%), the similar ~0...
November 28, 2016: Optics Express
https://www.readbyqxmd.com/read/27906038/craniopagus-parasiticus-a-parasitic-head-protruding-from-temporal-area-of-cranium-a-case-report
#9
Wassihun Nega, Meku Damte, Yonas Girma, Getachew Desta, Mengistu Hailemariam
BACKGROUND: Craniopagus parasiticus is rare with an incidence of approximately four to six cases in 10,000,000 births. In our case, the head of the parasitic twin protruded from the temporal area of the normal twin's cranium. The parasitic twin had two deformed lower limbs, of which one was rudimentary, and long bones of the bilateral lower limbs and some pelvic bone. Dissection of the mass of the parasitic twin's body revealed the intestine but no chest organs or abdominal organs. There was a rudimentary labium but no vaginal opening...
December 1, 2016: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/27905320/nanoporous-nanocomposite-membranes-via-hybrid-twin-screw-extrusion-multijet-electrospinning
#10
Semra Senturk-Ozer, Seda Aktas, Jing He, Frank T Fisher, Dilhan M Kalyon
Non-woven nanoporous membranes of poly(caprolactone), PCL, incorporated with multi-walled carbon nanotubes, CNTs, could be fabricated via an industrially-scalable hybrid twin screw extrusion and electrospinning process. The utilization of a spinneret with multiple nozzles allowed the increase of the flow rate beyond what is possible with conventional electrospinning using a single nozzle, albeit at the expense of difficulties in the control of the thickness distributions of the nanofibrous membranes. The thickness and orientation distributions and the resulting mechanical properties of the membranes could be modified via changes in voltage, angular velocity of the collector mandrel and separation distance of the collector from the spinneret...
December 1, 2016: Nanotechnology
https://www.readbyqxmd.com/read/27903647/the-production-and-utilization-of-gdp-glucose-in-the-biosynthesis-of-trehalose-6-phosphate-by-streptomyces-venezuelae
#11
Matías D Asencion Diez, Farzana Miah, Clare E M Stevenson, David M Lawson, Alberto A Iglesias, Stephen Bornemann
Trehalose-6-phosphate synthase OtsA from streptomycetes is unusual in that it uses GDP-glucose as the donor substrate rather than the more commonly used UDP-glucose. We now confirm that OtsA from Streptomyces venezuelae has such a preference for GDP-glucose and can utilise ADP-glucose to some extent too. A crystal structure of the enzyme shows that it shares twin Rossmann-like domains with the UDP-glucose-specific OtsA from Escherichia coli However, it is structurally more similar to Streptomyces hygroscopicus VldE, a GDP-valienol-dependent pseudo-glycosyltransferase enzyme...
November 30, 2016: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/27903320/effects-of-intrauterine-environment-on-the-magnitude-of-differences-within-the-pairs-of-monozygotic-and-dizygotic-twins
#12
Małgorzata Waszak, Krystyna Cieślik, Marzena Skrzypczak-Zielińska, Marlena Szalata, Karolina Wielgus, Oliwia Zakerska-Banaszak, Grzegorz Bręborowicz, Ryszard Słomski
The aim of this study was to determine the effects of intrauterine environment on the magnitude of intrapair differences in six somatic traits of monozygotic (MZ) and dizygotic (DZ) twins (1,263 pairs; 424 MZ twins and 839 DZ twins). Differences in intrauterine environments of MZ twins enforced division of the research material into four groups: (1) MZ-MC-TTTS - MZ twins from monochorionic (MC) pregnancies with twin-to-twin transfusion syndrome (TTTS), (2) MZ-MC (without TTTS)-MZ twins from MC pregnancies without TTTS, (3) MZ-DC-MZ twins from dichorionic (DC) pregnancies, and (4) DZ-DZ twins...
December 1, 2016: Twin Research and Human Genetics: the Official Journal of the International Society for Twin Studies
https://www.readbyqxmd.com/read/27902441/biosynthesis-of-selenate-reductase-in-salmonella-enterica-critical-roles-for-the-signal-peptide-and-dmsd
#13
Katherine Connelly, Calum Stevenson, Holger Kneuper, Frank Sargent
Salmonella enterica serovar Typhimurium is a Gram negative bacterium with a flexible respiratory capability. Under anaerobic conditions, S. enterica can utilise a range of terminal electron acceptors to sustain respiratory electron transport chains, including the potentially toxic compound selenate. The S. enterica selenate reductase is a membrane-bound enzyme encoded by the ynfEFGH-dmsD operon. The active enzyme is predicted to comprise at least three subunits where YnfE is a molybdenum-containing catalytic subunit...
October 20, 2016: Microbiology
https://www.readbyqxmd.com/read/27901447/multivariate-analysis-of-thyrotropin-in-preterm-newborns-based-on-adequacy-of-weight-for-gestational-age
#14
Vicente María Bosch-Giménez, Antonio Palazón-Bru, Álvaro Blasco-Barbero, Mercedes Juste-Ruiz, María Mercedes Rizo-Baeza, Ernesto Cortés-Castell
BACKGROUND: Different and conflicting data have been published concerning thyroid-stimulating hormone (TSH) levels among small-for-gestational-age (SGA) and appropriate-for-gestational-age (AGA) newborns. The hypothesis of our study was that SGA preterm infants have higher TSH levels than those who are not underweight. METHODS: This cross-sectional study analysed the TSH levels of all preterm newborns with a negative congenital hypothyroidism screening result (TSH<7...
November 30, 2016: Thyroid: Official Journal of the American Thyroid Association
https://www.readbyqxmd.com/read/27900537/rnai-mediated-resistance-to-rice-black-streaked-dwarf-virus-in-transgenic-rice
#15
Mohamed M S Ahmed, Shiquan Bian, Muyue Wang, Jing Zhao, Bingwei Zhang, Qiaoquan Liu, Changquan Zhang, Shuzhu Tang, Minghong Gu, Hengxiu Yu
Rice black-streaked dwarf virus (RBSDV), a member of the genus Fijivirus in the family Reoviridae, causes significant economic losses in rice production in China and many other Asian countries. Development of resistant varieties by using conventional breeding methods is limited, as germplasm with high level of resistance to RBSDV have not yet been found. One of the most promising methods to confer resistance against RBSDV is the use of RNA interference (RNAi) technology. RBSDV non-structural protein P7-2, encoded by S7-2 gene, is a potential F-box protein and involved in the plant-virus interaction through the ubiquitination pathway...
November 30, 2016: Transgenic Research
https://www.readbyqxmd.com/read/27900236/identification-of-two-sulfated-cholesterol-metabolites-found-in-the-urine-of-a-patient-with-niemann-pick-disease-type-c-as-novel-candidate-diagnostic-markers
#16
Masamitsu Maekawa, Kaoru Omura, Shoutaro Sekiguchi, Takashi Iida, Daisuke Saigusa, Hiroaki Yamaguchi, Nariyasu Mano
In the urine of a Niemann-Pick disease type C (NPC) patient, we have identified three characteristic intense peaks that have not been observed in the urine of a 3β-hydroxysteroid-Δ(5)-C27-steroid dehydrogenase deficiency patient or a healthy infant and adult. Based on accurate masses of the protonated molecules, we focused on two of them as candidate NPC diagnostic markers. Two synthesized authentic preparations agreed with the two compounds found in NPC patient urine in regard to both chromatographic behavior and accurate masses of the deprotonated molecules...
2016: Mass Spectrometry
https://www.readbyqxmd.com/read/27898952/frequency-of-leukochimerism-in-holstein-and-jersey-twinsets
#17
A S Young, B W Kirkpatrick
The current study was conducted to test breed difference in the frequency of leukochimerism. This study used leukochimerism as evidence of placental vascular anastomosis formation and compared its frequency in the Holstein and Jersey breeds. We test the null hypothesis that there is no difference in incidence of leukochimerism in the Holstein and Jersey breeds. Hair and blood samples were collected from 85 Jersey twinsets and 80 Holstein twinsets, ranging in age from 1 d to 8 yr. An additional 7 Holstein twinsets (6 complete and 1 partial where 1 twin died) were sampled originally 48 to 72 h after birth and resampled at 5 to 10 mo of age to provide an assessment of whether leukochimerism changed with age...
November 2016: Journal of Animal Science
https://www.readbyqxmd.com/read/27898944/life-cycle-efficiency-of-beef-production-viii-relationship-between-residual-feed-intake-of-heifers-and-subsequent-cow-efficiency-ratios
#18
M E Davis, P A Lancaster, J J Rutledge, L V Cundiff
Data were collected from 1953 through 1980 from identical and fraternal twin beef and dairy females born in 1953, 1954, 1959, 1964, and 1969, and from crossbred females born as singles in 1974, and their progeny. Numbers of dams that weaned at least 1 calf and were included in the first analysis were 37, 45, and 56 in the 1964, 1969, and 1974 data sets, respectively. Respective numbers of dams that weaned 3 calves and were included in a second analysis were 6, 8, 8, 22, 33, and 33 in the 1953, 1954, 1959, 1964, 1969, and 1974 experiments...
November 2016: Journal of Animal Science
https://www.readbyqxmd.com/read/27898444/what-twin-studies-have-taught-us-about-myopia
#19
Yanxian Chen, Wei Wang, Xiaotong Han, William Yan, Mingguang He
Myopia has become epidemic, particularly in East Asia, and is a major cause of visual impairment worldwide. Twin studies are an important resource to investigate the genetics and the gene-environment interaction in myopia. This article aims to provide an overview of major findings regarding myopia from different types of twin studies, from the heritability of myopia-related traits to novel findings of genome-wide association studies. In the postgenomic era, twin studies will continue to serve as a unique method in the investigation of gene-environment interaction...
November 2016: Asia-Pacific Journal of Ophthalmology
https://www.readbyqxmd.com/read/27898055/increased-dna-methylation-variability-in-type-1-diabetes-across-three-immune-effector-cell-types
#20
Dirk S Paul, Andrew E Teschendorff, Mary A N Dang, Robert Lowe, Mohammed I Hawa, Simone Ecker, Huriya Beyan, Stephanie Cunningham, Alexandra R Fouts, Anita Ramelius, Frances Burden, Samantha Farrow, Sophia Rowlston, Karola Rehnstrom, Mattia Frontini, Kate Downes, Stephan Busche, Warren A Cheung, Bing Ge, Marie-Michelle Simon, David Bujold, Tony Kwan, Guillaume Bourque, Avik Datta, Ernesto Lowy, Laura Clarke, Paul Flicek, Emanuele Libertini, Simon Heath, Marta Gut, Ivo G Gut, Willem H Ouwehand, Tomi Pastinen, Nicole Soranzo, Sabine E Hofer, Beate Karges, Thomas Meissner, Bernhard O Boehm, Corrado Cilio, Helena Elding Larsson, Åke Lernmark, Andrea K Steck, Vardhman K Rakyan, Stephan Beck, R David Leslie
The incidence of type 1 diabetes (T1D) has substantially increased over the past decade, suggesting a role for non-genetic factors such as epigenetic mechanisms in disease development. Here we present an epigenome-wide association study across 406,365 CpGs in 52 monozygotic twin pairs discordant for T1D in three immune effector cell types. We observe a substantial enrichment of differentially variable CpG positions (DVPs) in T1D twins when compared with their healthy co-twins and when compared with healthy, unrelated individuals...
November 29, 2016: Nature Communications
keyword
keyword
597
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"