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Prograde and retrograde growth of monazite in migmatites:An example from the Nagercoil Block,southern India

Geoscience Frontiers 2015年第3期6卷 373-387页

作者： Tim E.Johnson Chris Clark Richard J.m.taylor m.Santosh Alan S.Collins Department of Applied Geology The Institute for Geoscience Research(TIGeR)Curtin University School of the Earth Sciences and Resources China University of Geosciences(Beijing) Tectonics Resources and Exploration(TRaX)Department of Earth SciencesUniversity of Adelaide

Data from a migmatised metapelite raft enclosed within charnockite provide quantitative constraints on the pressure-temperature-time （P-T-t） evolution of the Nagercoil Block at the southernmost tip of peninsular India. An inferred peak metamorphic assemblage of garnet, K-feldspar, sillimanite, plagioclase, magnetite, ilmenite, spinel and melt is consistent with peak metamorphic pressures of 6-8 kbar and temperatures in excess of 900 ℃. Subsequent growth of cordierite and biotite record high-temperature retrograde decompression to around 5 kbar and 800 ℃. SHRImP U-Pb dating of magmatic zircon cores suggests that the sedimentary protoliths were in part derived from felsic igneous rocks with Palae- oproterozoic crystallisation ages. New growth of metamorphic zircon on the rims of detrital grains constrains the onset of melt crystallisation, and the minimum age of the metamorphic peak, to around 560 ma. The data suggest two stages of monazite growth. The first generation of REE-enriched monazite grew during partial melting along the prograde path at around 570 ma via the incongruent breakdown of apatite. Relatively REE-depleted rims, which have a pronounced negative europium anomaly, grew during melt crystallisation along the retrograde path at around 535 ma. Our data show the rocks remained at suprasolidus temperatures for at least 35 million years and probably much longer, supporting a long-lived high-grade metamorphic history. The metamorphic conditions, timing and duration of the implied clockwise P-T-t path are similar to that previously established for other regions in peninsular India during the Ediacaran to Cambrian assembly of that part of the Gondwanan supercontinent.

关键词： monazire migmatite Zircon Geochronology Phase equilibria modelling Gondwana

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Round spermatid injection into human oocytes:a systematic review and meta-analysis

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Asian Journal of Andrology 2021年第4期23卷 363-369页

作者： Brent m Hanson taylor P Kohn Alexander W Pastuszak Richard T Scott Jr Philip J Cheng James m Hotaling Department of Reproductive Endocrinology and Infertility IVI-Reproductive Medicine Associates of New JerseyBasking RidgeNJ 07920USA Department of Urology The Brady Urological Institute at Johns Hopkins UniversityBaltimoreMD 21287USA Department of Surgery University of Utah Center for Reconstructive Urology and Men's HealthSalt Lake CityUT 84108USA

many azoospermic men do not possess mature spermatozoa at the time of surgical sperm *** study is a systematic review and meta-analysis evaluating outcomes following round spermatid injection(ROSI),a technique which utilizes immature precursors of spermatozoa for *** electronic search was performed to identify relevant articles published through October *** cohort studies in English involving male patients who had round spermatids identified and used for fertilization with human oocytes were *** rate,pregnancy rate,and resultant delivery rate were assessed following ***-analysis outcomes were analyzed using a random-effects *** were extracted from 22 studies involving 1099 couples and 4218 embryo *** fertilization rate after ROSI was 38.7%(95%confidence interval[CI]:31.5%–46.3%),while the pregnancy rate was 3.7%(95%CI:3.2%–4.4%).The resultant delivery rate was low,with 4.3%of embryo transfers resulting in a delivery(95%CI:2.3%–7.7%).The pregnancy rate per couple was 13.4%(95%CI:6.8%–19.1%)and the resultant delivery rate per couple was 8.1%(95%CI:6.1%–14.4%).ROSI has resulted in clinical pregnancies and live births,but success rates are considerably lower than those achieved with mature *** this technique may be a feasible alternative for men with azoospermia who decline other options,couples should be aware that the odds of a successful delivery are greatly diminished and the prognosis is relatively poor.

关键词： azoospermia in vitro fertilization infertility spermatozoa testis

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Strategies towards statistically robust interpretations of in situ U-Pb zircon geochronology

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Geoscience Frontiers 2016年第4期7卷 581-589页

作者： Christopher J.Spencer Christopher L.Kirkland Richard J.m.taylor The Institute of Geoscience Research(TIGeR) Department of Applied GeologyWestern Australian School of MinesCurtin UniversityWA 6102Australia Centre for Exploration Targeting-Curtin Node Department of Applied GeologyWestern Australian School of MinesCurtin UniversityWA 6102Australia Australian Research Council Centre of Excellence for Core to Crust Fluid SystemsPerthWA 6102Australia

Zircon U-Pb geochronology has become a keystone tool across Earth science, arguably providing the gold standard in resolving deep geological time. The development of rapid in situ analysis of zircon （via laser ablation and secondary ionization mass spectrometry） has allowed for large amounts of data to be generated in a relatively short amount of time and such large volume datasets offer the ability to address a range of geological questions that would otherwise remain intractable （e.g. detrital zircons as a sedi- ment fingerprinting method）. The ease of acquisition, while bringing benefit to the Earth science com- munity, has also led to diverse interpretations of geochronological data. In this work we seek to refocus U -Pb zircon geochronology toward best practice by providing a robust statistically coherent workflow. We discuss a range of data filtering approaches and their inherent limitations （e.g. discordance and the reduced chi-squared; mSWD）. We evaluate appropriate mechanisms to calculate the most geologically appropriate age from both 238U/206pb and 207pb/206pb ratios and demonstrate the cross over position when chronometric power swaps between these ratios. As our in situ analytical techniques become progressively more precise, appropriate statistical handing of U-Pb datasets will become increasingly pertinent.

关键词： Zircon Geochronology U-Pb Geostatistics mSWD

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Synthesis of a-SnWO_4 thin-film electrodes by hydrothermal conversion from crystalline WO_3

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Chinese Chemical Letters 2015年第4期26卷 474-478页

作者： Kayla J.Pyper taylor C.Evans Bart m.Bartlett Department of Chemistry University of michigan

Thin film electrodes of the orthorhombic form of tin tungstate （α-SnWO4） were prepared using a hydrothermal method to convert thin films of WO3 in aqueous SnCI2. The pH dependence of the growth mechanism was identified by scanning electron microscopy （SEm） and X-ray diffraction （XRD）. The XRD patterns show complete conversion of WO3（s） to SnWO4（s） at pH 1, 4, and 7. SEm images reveal a morphology change from sponge-like platelets to sharp nanowires as the pH increases from 1 to 7. The α-SnWO4 thin films were reddish brown in color, and display an indirect band gap of 1.9 eV by diffuse reflectance UV-vis spectroscopy. α-SnWO4 is therefore solar-responsive, and a chopped light linear sweep voltammogram recorded under 100 mW/cm2 Am1.5 simulated solar illumination in a pH 5 0.1 mol/L KPi buffer show a visible light response for photoelectrochemical water oxidation, producing 32 μA/cm2 at 1.23 V vs. RHE.

关键词： Alpha tin tungstateHydrothermal conversionmicrostructureHydrothermal method

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油气两相流工况下汽车发动机轴承气蚀磨损的模拟试验研究

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机械工程学报 2001年第2期37卷 83-86,95页

作者：安琦 Priest m taylor C m 华东理工大学机械学院上海200237 The University of LeedsLS29JT UK

采用超声振动原理建立了一台汽车发动机滑动轴承模拟气蚀试验装置。试验研究了空气混入滑动轴承后对其气蚀磨损的影响。通过大量试验研究结果的分析比较 ,发现空气的混入会使滑动轴承的气蚀磨损降低 ,且含气率越高这种影响作用越明显。

关键词：油气两相流滑动轴承气蚀磨损汽车发动机试验装置

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Patterns of sperm use by twice-mated female Queensland fruit flies

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Insect Science 2022年第4期29卷 1159-1169页

作者： Jason Shadmany Siu F.Lee Thu N.m.Nguyen Phillip W.taylor Applied BioSciences Macquarie UniversityNorth RydeNSWAustralia CSIRO Land and Water Black MountainACTAustralia School of BioSciences University of MelbourneParkvilleVictoriaAustralia

multiple mating by females,polyandry,is common in insects,including in tephritid fruit *** insects that remate commonly store sperm of multiple *** the sperm of different males contribute to paternity is an important element of sexual *** behavior and reproduction of the Queensland fruit fly(Qfly),Bactrocera tryoni,has been extensively investigated both in relation to understanding this economically important species’reproductive biology and in relation to implications for Sterile Insect Technique(SIT),whereby sterile flies are released to constrain reproduction of pest *** numerous studies of pre-and postcopulatory sexual selection in Qfly,there have been no direct studies of paternity patterns in polyandrous female *** used two morphologically distinguishable lines to investigate patterns of sperm use in *** two lines showed comparable mating performance evidenced by similar mating and remating frequency,copula duration,and proportion of second mate paternity(P2)between reciprocal *** mechanism of sperm usage,with P2 close to 0.5 immediately after the second mating followed by gradual decrease of P2 as females aged,is most consistent with stratification or repositioning of *** observed in the present study are compared with the available information from other tephritid fruit flies,and are discussed in relation to this species’reproductive biology,known patterns of sperm storage,and SIT.

关键词： muliple mating polyandry sperm competition sperm pecedence Tephritidac

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Application of serine integrases for secondary metabolite pathway assembly in Streptomyces

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Synthetic and Systems Biotechnology 2020年第2期5卷 111-119页

作者： Hong Gao Gabrielle taylor Stephanie K.Evans Paul C.m.Fogg margaret C.m.Smith Department of Biology University of YorkYorkYO105DDUnited Kingdom School of Health&Life Science Teesside UniversityMiddlesbroughTS13BA National Horizons Centre Darlington campusTeesside UniversityDarlingtonDL11HG

Serine integrases have been shown to be efficient tools for metabolic pathway *** further improve the flexibility and efficiency of pathway engineering via serine integrases,we explored how multiple orthogonally active serine integrases can be applied for use in vitro for the heterologous expression of complex biosynthesis pathways in Streptomyces spp.,the major producers of useful bioactive natural *** results show that multiple orthogonal serine integrases efficiently assemble the genes from a complex biosynthesis pathway in a single in vitro recombination reaction,potentially permitting a versatile combinatorial assembly ***,the assembly strategy also permitted the incorporation of a well-characterised promoter upstream of each gene for expression in a heterologous *** results demonstrate how site-specific recombination based on orthogonal serine integrases can be applied in Streptomyces spp.

关键词： Serine integrase Pathway assembly Streptomyces Erythromycin

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Alcohol-induced Wnt signaling inhibition during bone fracture healing is normalized by intermittent parathyroid hormone treatment

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Animal models and Experimental medicine 2020年第2期3卷 200-207页

作者： Esha m.Kapania taylor JReif Aaron Tsumura Jonathan m。Eby John J.Callaci Internal medicine-Pediatric Resident Rush University Medical CenterChicagoILUSA Limb Lengthening and Complex Reconstruction Fellowship Hospital for Special SurgeryNew YorkNYUSA Department of Orthopaedic Surgery and Rehabilitation Loyola University Medical CenterMaywoodILUSA Alcohol Research Program(ARP) Loyola University Chicago Stritch School of MedicineMaywoodILUSA

Nearly half of orthopaedic trauma patients are intoxicated at the time of injury, and excess alcohol consumption increases the risk for fracture nonunion. Previous studies show alcohol disrupts fracture associated Wnt signaling required for normal bone fracture repair. Intermittent parathyroid hormone(PTH) promotes bone growth through canonical Wnt signaling, however, no studies have investigated the effect of PTH on alcohol-inhibited bone fracture repair. male C57 BL/6 mice received two-3 day alcohol binges separated by 4 days before receiving a mid-shaft tibia fracture. Postoperatively, mice received PTH daily until euthanasia. Wnt/β-catenin signaling was analyzed at 9 days post-fracture. As previously observed, acute alcohol exposure resulted in a >2-fold decrease in total and the active form of β-catenin and a 2-fold increase in inactive β-catenin within the fracture callus. Intermittent PTH abrogated the effect of alcohol on β-catenin within the fracture callus. Upstream of β-catenin, alcohol-treated animals had a 2-fold decrease in total LRP6, the Wnt co-receptor, which was restored with PTH treatment. Alcohol nor PTH had any significant effect on GSK-3β. These data show that intermittent PTH following a tibia fracture restores normal expression of Wnt signaling proteins within the fracture callus of alcohol-treated mice.

关键词： ethanol fracture callus parathyroid hormone Wnt signaling pathway

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温度及压力对滑动轴承气蚀磨损影响的实验研究

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机械科学与技术 2001年第4期20卷 565-566页

作者：安琦 C.m.taylor 华东理工大学机械学院上海200237 SchoolofmechanicalEngineering UniversityofLeedsLS29JTUK

采用超声振动原理建立了滑动轴承模拟气蚀实验装置 ,研究了温度及压力变化对滑动轴承气蚀磨损的影响。发现温度及压力的升高都会使滑动轴承的气蚀磨损增加。

关键词：滑动轴承气蚀温度压力磨损

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mate assessment behavior is correlated to learning ability in female threespine sticklebacks

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Current Zoology 2019年第3期65卷 295-304页

作者： taylor L.RYSTROm Theo C.m.BAKKER Ingolf P.RICK Department of Behavioural Biology University of Munster Badestrasse 13 Munster 48149 Germany Institute for Evolutionary Biology and Ecology University of Bonn An der Immenburg 153121 Bonn Germany

In many species, males signal quality with elaborate traits, but females often show inter-individual variation in pref ere nee for these traits. Choosi ng a mate requires multiple cog nitive steps;therefore, cog nitive style (how an in dividual processes information) likely in fluences the perception of sexual signals and ability to choose a high-quality mate. An important component of cognitive style is flexibility;cognitively flexible individuals are more perceptive to shifts in cues. We hypothesized that cognitively flexible individuals would acquire more information about potential mates, better discern between two quality-signaling traits, and thus be more discriminatory. Here, we show that mate assessment is correlated to other cognitive traits. Although we did not detect an effect of cogn itive style on mate pref ere nee or discriminatio n, we found that female threespi ne sticklebacks Gasterosteus aculeatus that spent more time assessing potential mates (more responsive) in a dichotomous mate choice task reached both the initial and reversal learning criterion in a spatial learning task with fewer errors. However, these highly responsive females made more consecutive mistakes immediately at the beginning of the reversal phase, suggest!ng that they did not quickly adapt to the en vironmental cha nge but in stead rapidly formed strict routi nes duri ng the learning task that were eventually reversible after repeated errors. Furthermore, we found evidenee for condition-dependent mate pref ere nee, with larger females preferring the high-quality male. These are among the first results that illustrate how cog nitive traits might in flue nee mate choice, which has implicati ons for the st re ngth and di recti on of sexual selection.

关键词： cognition cognitive flexibility choosiness computer animation mate choice sexual selection

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