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Acta Metallurgica Sinica(English Letters) 2004年第6期17卷 830-834页

作者： Y.h.Li J.Wang Y.S.Li Y.KShan Dep.ofMaterialScienceandEngineering ShenyangLigongUmversityShenyang110168China InstituteofIndustry NingboPolytechnicNingbo315800China SchoolofMaterial＆ChemicalEngineering SouthernInstituteofMetallurgy＇Ganzhou341000China InstituteofMetalResearch TheChineseAcademyofSdencesShenyang110016China

Recrystallization behavior of a low carbon X70 pipeline steel was studied in the plane strain compression condition. It was found that the dynamic recovery but no dynamic recrystal- lization occurred in the current ex... 详细信息

关键词： pipeline steel, plane strain compression, recrystallization, austenite grain boundary

Mineralogy and geochemistry of fine-grained Dahab stream sediments, Southeastern Sinai, Egypt: emphasis on the intergrowths of Fe–Ti oxides

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Acta Geochimica 2021年第6期40卷 871-894页

作者： Adel A.Surour Ahmed.M.A.El-Kammar Ebtisam h.Arafa hala M.Korany Petroleum and Mining Geology Faculty of SciencesGalala University43511 New Galala CityEgypt Department of Geology Faculty of ScienceCairo UniversityGiza 12613Egypt

Mineralogical and geochemical characteristics of stream sediments collected from 30 stations in the Dahab-Wadi Kid area(southeastern Sinai,Egypt)are *** studied sediments contain considerable amounts of heavy minerals,including abundant Fe–Ti oxides,with up to 25.94%index figure that measures the relative abundance of heavy minerals to light *** of the sediments and nature of Fe–Ti oxide intergrowths,in addition to some non-opaque heavy minerals,indicate multiple provenances with contributions from a variety of Neoproterozoic mafic to felsic *** amounts of heavy minerals are derived from schists that belong to the so-called Wadi Kid volcanosedimentary *** to the considerable contribution of the felsic intrusions represented by within-plate granites,the sediments are enriched in REE-bearing minerals(e.g.,monazite,cerianite,La-cerianite and allanite),V-bearing thorite,zircon,and a ZrO_(2) *** majority of Fe–Ti oxides are derived from the mafic intrusions,and they show evidence of pre-,syn-and post-depositional phases of alteration and formation of *** to the geochemical signature of the bulk silt fraction,there is remarkable enrichment of LREEs with distinct negative Eu anomaly,and this supports dominance of a provenance dominated by felsic intrusions(i.e.,the A-type within-plate granite and associated pegmatites).Also,the felsic provenance is responsible for slight abnormality of ∑PU+Th content(up to~37 ppm)and few anomalous samples bear uraniferous zircon and Ce-type *** present paper sheds light on the fertility of the Dahab stream sediments in some economic minerals for possible future exploitation,not for gold only,but for potential REEbearing minerals that are needed for a wide spectrum of modern technological industries.

关键词： Dahab stream sediments Silt fraction Fe-Ti oxides Textural variations Rees enrichment

Arterial complication of irreversible electroporation procedure for locally advanced pancreatic cancer

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World Journal of Gastrointestinal Oncology 2016年第10期8卷 751-756页

作者： Yahya Ekici Tugan Tezcaner hüseyin Onur Aydin Fatih Boyvat G?khan Moray Department of General Surgery Medical Faculty of Baskent University Department of Radiology Medical Faculty of Baskent University

Irreversible electroporation(IRE) is a non-thermal ablation technique used especially in locally advanced pancreatic carcinomas that are considered surgically *** present the first case of acute superior mesenteric artery(SMA) occlusion secondary to pancreatic IRE procedure that has not been reported before in the literature.A 66-year-old man underwent neoadjuvant chemoradiotherapy for locally advanced pancreatic ductal *** procedure was applied to the patient during laparotomy under general *** finishing the procedure,an acute intestinal ischemia was detected.A conventional vascular angiography was performed and a metallic stent was successfully placed to the SMA and blood flow was *** is important to be careful in such cases of tumor involvement of SMA when evaluating for IRE procedure of pancreatic tumor.

关键词： Irreversible electroporation Mesenteric artery occlusion Locally advanced pancreatic cancer Superior mesenteric artery

Photometric analysis of two extreme low mass ratio contact binary systems

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Research in Astronomy and Astrophysics 2021年第9期21卷 217-223页

作者： Surjit S.Wadhwa Nick F.h.Tothill Ain Y.De horta Miroslav Filipovié School of Science Western Sydney UniversityLocked Bag 1797PenrithNSW 2751Australia

Multi-band photometry and light curve analysis for two newly recognized contact binary systems,TYC 6995-813-1 and NSVS 13602901,are *** were found to be of extreme low mass ratios 0.11 and 0.17,*** secondary components of both systems show evidence of considerable evolution with elevated densities as well as both luminosity and radii well above their main sequence *** in the absence of significant spot activity,at least one of the systems,TYC 6995-813-1,displays features of magnetic and chromospheric *** 6995-813-1 is also determined to be a potential merger candidate with its current separation near the theoretical instability separation.

关键词： stars:binaries:eclipsing stars:evolution stars:low-mass techniques:photometric

Natural ray-emitting radionuclides in Egyptian cement

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Nuclear Science and Techniques 2005年第6期16卷 376-380页

作者： A.M.EL-ARABI A.ABBADY A.h. EL-KAMEL A. NOSIER A. MOUSTAFA Physics Deptartment Faculty of Science Qena South Valley University Egypt Physics Deptartment Faculty of Science Assiut University Egypt Physics Deptartment Faculty of Science El-Azhar University Egypt

Samples of cement manufactured in Egypt and the raw materials have been analyzed usinggamma-spectroscopy, in order to determine the concentration of natural radionuclides and associated radiologicalhazard. The mean of specific activity due to radionuclides of 226 Ra, 232 Th and 40 K was found to be (20±4), (11± 2),(320±18) (gypsum), (41±8), (27±5), (410±27) (clay), (58±11), (18±3), (321±20) (iron ore) and (37.6±6), (11.8±3),(178.6±15) Bq?kg -1 (Portland cement), respectively. 40 K concentration could not be detected in slag, limestone, sul-phateresistant cement (S.R.C.), clinker and white cement, while the mean specific activities of 226 Ra and 232 Th are(239±16), (48.7±7); (31.5±5), (10±2); (47±7), (20±5); (23±5), (10.4±3) and (23±5), (11±3) Bq?kg -1 , respectively. Theactivities (concentrations) are in the same range as the data released in other countries. The calculated radiation haz-ardparameters for all the samples are still lower than the acceptable values in Egypt and other countries.

关键词： γ射线放射性核埃及伽马射线

A new microchannel capillary flow assay (MCFA) platform with lyophilized chemiluminescence reagents for a smartphone-based POCT detecting malaria

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Microsystems & Nanoengineering 2020年第1期6卷 1316-1333页

作者： Sthitodhi Ghosh Kashish Aggarwal Vinitha T.U Thinh Nguyen Jungyoup han Chong h.Ahn Department of Electrical Engineering and Computer Science Microsystems and BioMEMS LaboratoryUniversity of CincinnatiCincinnatiOH 45221USA Mico BioMed USA Inc. 10999 Reed Hartman HighwaySTE 309CCincinnatiOH 45242USA

There has been a considerable development in microfluidic based immunodiagnostics over the past few years which has greatly favored the growth of novel point-of-care-testing(POCT).however,the realization of an inexpensive,low-power POCT needs cheap and disposable microfluidic devices that can perform autonomously with minimum user *** work,for the first time,reports the development of a new microchannel capillary flow assay(MCFA)platform that can perform chemiluminescence based ELISA with lyophilized chemiluminescent *** new MCFA platform exploits the ultra-high sensitivity of chemiluminescent detection while eliminating the shortcomings associated with liquid reagent handling,control of assay sequence and user *** functionally designed microchannels along with adequate hydrophilicity produce a sequential flow of assay reagents and autonomously performs the ultra-high sensitive chemiluminescence based ELISA for the detection of malaria biomarker such as *** MCFA platform with no external flow control and simple chemiluminescence detection can easily communicate with smartphone via USB-OTG port using a custom-designed optical *** use of the smartphone for display,data transfer,storage and analysis,as well as the source of power allows the development of a smartphone based POCT analyzer for disease *** paper reports a limit of detection(LOD)of 8 ng/mL by the smartphone analyzer which is sensitive enough to detect active malarial *** MCFA platform developed with the smartphone analyzer can be easily customized for different biomarkers,so a hand-held POCT for various infectious diseases can be envisaged with full networking capability at low cost.

关键词： POCT smart capillary

Better tillage selection before ridge–furrow film mulch can facilitate root proliferation, and increase nitrogen accumulation,translocation and grain yield of maize in a semiarid area

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Journal of Integrative Agriculture 2023年第6期22卷 1658-1670页

作者： ZhANG Miao-miao DANG Peng-fei LIYu-ze QIN Xiao-liang Kadambot h.M.SIDDIQUE College of Agronomy/Key Laboratory of Crop Physio-ecology and Tillage Science in Northwestern Loess Plateau Northwest A&F UniversityYangling 712100P.R.China The UWA Institute of Agriculture and School of Agriculture&Environment The University of Western AustraliaPerth WA 6001Australia

Plastic film mulch systems are used widely in arid areas, and the associated tillage measures affect soil properties, root and crop growth, and nutrient uptake. however, much debate surrounds the most suitable tillage method for plastic film mulch systems. We conducted a two-year field experiment to explore the impact of three tillage treatments-rotary tillage before ridge–furrow plastic film mulch(MR), no-tillage before ridge–furrow plastic film mulch(MZ), and plow tillage before ridge–furrow plastic film mulch(MP)-on soil total nitrogen, available nitrogen, root stratification structure,nitrogen transfer and utilization, and maize yield. The results showed that MP had better soil quality than either MR or MZ over 2019 and 2020, with higher nitrate-nitrogen and total nitrogen in the 0–40 cm soil layer. MP improved the soil physicochemical properties more than the other treatments, producing significantly higher root numbers and root biomass for the aerial and underground nodal roots than MR and MZ. At harvest, MP had the highest root biomass density,root length density, and root surface area density in the different soil layers(0–20, 20–40, and 0–40 cm). Significant correlations occurred between root biomass and aboveground nitrogen accumulation during maize growth. During grain filling, MP had the greatest nitrogen transfer amount, significantly increasing root and aboveground nitrogen transfer by 19.63–45.82% and 11.15–24.56%, respectively, relative to the other treatments. MP significantly produced 1.36–26.73%higher grain yields and a higher grain crude protein content at harvest than MR and MZ. MP also had higher values for the nitrogen harvest index, nitrogen uptake efficiency, and partial factor productivity of nitrogen fertilizer than MR and *** conclusion, plow tillage combined with a ridge–furrow plastic film mulch system facilitated maize root development and improved nitrogen utilization, thereby increasing maize yield more than the other treatments.

关键词： maize tillage plastic film mulch root nitrogen transfer

Incidence and risk factors for the development of anemia following gastric bypass surgery

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World Journal of Gastroenterology 2010年第15期16卷 1867-1870页

作者： Dimitrios V Avgerinos Omar h Llaguna Matthew Seigerman Amanda J Lefkowitz I Michael Leitman Department of Surgery Beth Israel Medical Center Albert Einstein College of Medicine

AIM:To evaluate the incidence and risk factors for the development of anemia after RouxenY gastric bypass (RYGB).METhODS: A retrospective analysis of patients undergoing RYGB from January 2003 to November 2007 was performed. All patients had a preoperative body mass index > 40 kg/m2. A total of 206 patients were evaluated. All patients were given daily supplements of ferrous sulfate tablets for 2 wk following their operation. hematological and metabolic indices were routinely evaluated following surgery. Patients were followed for a minimum of 86 ***: There were 41 males and 165 females with an average age of 40.8 years. 21 patients (10.2%) developed postoperative anemia and 185 patients (89.8%) did not. Anemia was due to iron deficiency in all cases. The groups had similar demographics, surgical procedure and comorbidities. Menstruation (P = 0.02) and peptic ulcer disease (P = 0.01) were risk factors for the development of postoperative ***: Iron deficiency anemia is frequent. RYGB surgery compounds occult blood loss. Increased ferrous sulfate supplementation may prevent iron depletion in populations at increased risk.

关键词： Anemia Complication Gastric bypass surgery Obesity

cGMP regulates Na+/h+ exchanger NhE3 by phosphorylating it at the same amino acids as cAMP but with a different time course

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cGMP regulates Na+/H+ exchanger NHE3 by phosphorylating it a...

Square-root parametrization of dark energy in f(Q)cosmology

2008北京国际生理科学学术大会

作者： ChEN TE KOChINSKY h ChA BY ARONSON P DONOWITZ M Departments of Medicine and Physiology GI DivisionThe Johns Hopkins University School of MedicineBaltimoreMarylandUSA Departments of Internal Medicine Yale University School of MedicineNew HavenConnecticutUSA Departments of Internal Medicine Yale University School of Medicine.New HavenConnecticutUSA

＜正＞Background:The epithelial brush border Na/h exchanger NhE3 is regulated by second messengers during digestion and inhibited in diarrheal *** and cGMP both inhibit NhE3 *** cAMP is known to act by phosphorylating NhE3 at two amino acids,S552 and S605 and reducing plasma membrane NhE3 amount,how elevated cGMP acts is *** study tested the hypothesis that cGMP inhibits NhE3 activity by phosphorylating NhE3 and reducing its plasma membrane ***:Studies were carried out in OK cells,a polarized renal proximal tubule cell line expressing hA-NhE3,the multi-PDZ protein NhERF2 and cGKⅡ. Inhibition by cGMP was measured with BCECF fluorometery and was correlated with changes in phosphorylation of NhE3 determined with anti-phospho-NhE3 S552 and S605 *** NhE3 was determined by cell surface ***:In the presence of NhERF2 and cGKII,cGMP inhibited NhE3 *** occurred rapidly,onset was at 15 min after addition of cGMP,maxium at 45mins and lasted at least 60 *** increased NhE3 phosphorylation at both S552 and S605 similar to the effect of *** phosphorylation of NhE3 did not involve PKA since h89,a PKA inhibitor,did not alter cGMP-induced NhE3 *** the time course of cAMP changes in phosphorylation which occurred quickly but lasted at least 60 min,the effect of cGMP was shorter lived,occurring at 30 but not 60 min at both S552 and *** surface biotinylation in OK/ NhERF2/hA-NhE3/cGKⅡcells showed that cytosolic NhE3 was increased by both cAMP and ***: （1）cGMP inhibits NhE3 by a cGKⅡ,NhERF2 dependent process that involves phosphorylation of NhE3 at S552 and S605 but does not involve PKA.（2）cGMP inhibition of NhE3 appears to involve a change in NhE3 trafficking. （3）cGMP-induced phosphorylation of but not inhibition of NhE3 is shorter lived than that by cAMP,suggesting involvement of different phosphatases,perhaps binding to NhERF2.（4）There is an additional,a

关键词： cGMP NhE3 phosphorylation

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Communications in Theoretical Physics 2023年第12期75卷 105-114页

作者： M Koussour N Myrzakulov Alnadhief h A Alfedeel E I hassan D Sofuoğlu Safa M Mirgani Quantum Physics and Magnetism Team LPMCFaculty of Science Ben M'sikCasablanca Hassan II University L.N.Gumilyov Eurasian National University Ratbay Myrzakulov Eurasian International Centre for Theoretical Physics Department of Mathematics and Statistics Imam Mohammad Ibn Saud Islamic University(IMSIU) Department of Physics Faculty of ScienceUniversity of Khartoum Centre for Space Research North-West University Department of Physics Istanbul University Vezneciler 34134

This paper is a parametrization of the equation of state(Eo S)parameter of dark energy(DE),which is parameterized using square-root(SR)form i.e.ω_(SR)=ω_(0)+ω_(1)z/√z^(2)+1,where ω_(0)and ω_(1) are free *** parametrization is examined in the context of the recently suggested f(Q)gravity theory as an alternative to general relativity(GR),in which gravitational effects are attributed to the non-metricity scalar Q with the functional form f(Q)=Q+αQ^(n),whereαand n are arbitrary *** derive observational constraints on model parameters using the hubble dataset with 31 data points and the Supernovae(SNe)dataset from the Pantheon samples compilation dataset with 1048 data *** the current model,the evolution of the deceleration parameter,density parameter,EoS for DE,and Om(z)diagnostic have all been *** has been shown that the deceleration parameter favors the current accelerated expansion *** has also been shown that the EoS parameter for DE has a quintessence nature at this time.

关键词： cosmology dark energy f(Q)gravity EoS parameter