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美国明塔克矿用浮选柱改善浮选回收率

国外金属矿山 1998年第2期23卷 51-56页

作者：金宗德刘明鉴 R.J.斯特罗坎尔 d.v.约翰逊美国钢公司明塔克矿

明塔克矿为生产优质低硅自熔性球团，采用了浮选降硅。粗浮选泡沫曾用derrick细筛回收－500目的细粒铁，但效果欠佳，故改用浮选柱取代细筛。与细筛相比，铁精矿产率提高24％，质量有所提高，全厂铁回收率提高了1．25％。介绍了影响浮... 详细信息

明塔克矿为生产优质低硅自熔性球团，采用了浮选降硅。粗浮选泡沫曾用derrick细筛回收－500目的细粒铁，但效果欠佳，故改用浮选柱取代细筛。与细筛相比，铁精矿产率提高24％，质量有所提高，全厂铁回收率提高了1．25％。介绍了影响浮选柱生产的控制因素，阐述了在流程中采用计算机控制的加法器箱装置，合理控制从浮选柱精矿分配到最终精矿的矿量，实现初步优化生产。

关键词：浮选柱浮选回收率铁矿石浮选柱控制选矿

dietary xylanase and live yeast supplementation influence intestinal bacterial populations and growth performance of piglets fed a sorghum-based diet

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Animal Nutrition 2020年第4期6卷 457-466页

作者： Gemma González-Ortiz Marco A.callegari Pete Wilcock diego Melo-duran Michael R.Bedford hilário R.v.Oliveira Marcos A.A.da silva carlos R.Pierozan caio A.da silva AB vista MarlboroughWiltshireSN84ANUnited Kingdom AKEI Animal Research Fartura18870000Brazil servei de Nutricio i Benestar Animal(sNiBA) Department de Ciencia Animal i dels AlimentsUniversitat Autonoma de Barcelona(UAB)08193Spain Universidade Estadual Norte do Parana Bandeirantes86360000Brazil Universidade Estadual de Londrina Londrina86051990Brazil

This study was to evaluate the effect of xylanase supplementation and the addition of live yeast,saccharomyces cerevisiae,on growth performance and intestinal microbiota in *** hundred and eighty commercial crossbred 23-d-old piglets(PIc 417)were sorted by initial BW and allocated to 3 treatments:control(cTR)diet,cTR diet supplemented with xylanase at 16,000 birch xylan units/kg(XYL)and XYL diet supplemented with live yeast(2 x 1010 cFU/g)at 1 kg/t(XYL+LY).Each treatment had 10 replicates,with 6 animals each.A sorghum-based diet and water were available ad libitum for 42 d of the *** daily gain(AdG)and average daily feed intake(AdFI)were measured from 0 to 42 d(23-to 65-d-old)and feed conversion ratio(FcR)*** the end of the study,bacterial identification through 16 s rRna(v3 to v4)sequencing of the ileal and caecal digesta from one piglet per replicate was *** treatment effects were observed on *** offered the live yeast in addition to the xylanase had increased AdG compared with those supplemented with xylanase alone(XYL+LY ***;P=0.655).FcR was improved with XYL and XYL+LY compared with cTR(P=0.018).clostridiaceae counts in the ileum tended to reduce by 10%with XYL and 14%with XYL+LY compared to cTR(P=0.07).XYL and XYL+LY increased the counts of Lactobacillaceae in the caecum compared with cTR(Pdietary supplementation of live yeast combined with xylanase improved growth performance and microbial balance of piglets during the nursery phase.

关键词： sorghum Nursery piglet Xylanase Live yeast Growth performance Microbiota

Tailoring of structural,optical and electrical properties of anatase TiO_(2)via doping of cobalt and nitrogen ions

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Journal of Materials science & Technology 2022年第16期111卷 287-297页

作者： Anchal sharma Puneet Negi Ruhit Jyoti Konwar hemaunt Kumar Yogita verma shailja Prakash chandra sati Bhargav Rajyaguru himanshu dadhich N.A.shah P.s.solanki department of Physics Eternal UniversityBaru SahibHimachal Pradesh173101India centre of Excellence in Energy science and Technology Shoolini UniversitySolanHimachal Pradesh173229India department of Applied science and humanities Rajkiya Engineering CollegeBijnorUttar Pradesh246725India department of Physics Rajiv Gandhi Government Post Graduate CollegeMandsaurMadhya Pradesh458001India department of Physics Saurashtra UniversityRajkot360005India

Pure(pristine)anatase and mono–doped and co–doped derivatives of TiO_(2)having nitrogen(N)and cobalt(co)as dopants with respective fixed doping concentrations of 0.7 mol.%and 1.0 mol.%were synthesized using auto–combustion sol–gel *** doping effects at corresponding non–metal and transition metal sites of TiO_(2)on the basis of the structural,optical and electrical properties have been investigated.X–ray diffraction(XRd)measurement confirms the formation of pure anatase phase of TiO_(2)for all samples having I41/amd space group of tetragonal structure which has been also verified by the Raman spectroscopy *** crystallographic parameters have been calculated by performing Rietveld refinement of XRd data including average crystallite size that has been observed in the range of10–15 *** anatase phase indicates the incorporation of co^(2+)into TiO_(2)lattice which assists the substitution of N in place of oxygen in co–doped TiO_(2).The band gap tuning towards the visible region from3.2 to 2.1 e v has been achieved with mono–doping and co–doping of the N and co in TiO_(2)*** can be described in terms of the formation of localized levels of N–2p and co–3d states in mono–doping and an isolated intermediate band formation in co–doping *** properties have been investigated in details and explained as the synergetic effects of structural and inherent ionic characters of various *** observed band gaps of all doped samples lie within the visible region which makes them pertinent as the solar energy harnessing materials for photocatalytic and photovoltaic applications.

关键词： TiO_(2) sol–Gel X–ray diffraction Electrical properties Optical properties

cathodic hydrogen as Electron donor in Enhanced Reductive dechlorination

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chinese Journal of chemical Engineering 2013年第12期21卷 1386-1390页

作者：张瑞玲路晓霞 danny d. Reible 焦刚珍秦松岩 school of Environmental science and safety Engineering Tianjin University of Technology Tianjin 300384 China Anchor Qea LLC Austin TX 78746 USA department of civil & Environmental Engineering Texas Tech University Lubbock TX 79409-1023 USA

In situ capping is an attractive and cost-effective method for remediation of contaminated sediments,but few studies on enhancing contaminant degradation in sediment caps have been reported,especially for chlorinated *** enhanced bioactive barrier is a new process for in situ remediation for reducible compounds in soil or *** primary objective of this study is to determine if electrodes in sediment could create a redox gradient and provide electron acceptor/donor to stimulate degradation of chlorinated *** results demonstrate that graphite electrodes lead to sustainable evolution of hydrogen,displaying zero-order kinetics in the initial stages with different *** constant rates of hydrogen evolution at 3,4,and 5 v are1.05,2.54,and 4.3 nmol·L 1·d 1,*** higher voltage can produce more hydrogen,but it could not keep long time because the over potentials on electrode surfaces prevent its *** study shows that 4 v is more appropriate for hydrogen *** measured and evaluated concentration of 1,2,3,5-tetrachlorobenzene in pore water of sediment and concentration of sulfate show that dechlorination is inhibited at higher concentration of sulfate.

关键词： hydrogen electrode reductive dechlorination capping

What Is the Missing dark Energy in a Nutshell and the hawking-hartle Quantum Wave collapse

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International Journal of Astronomy and Astrophysics 2013年第3期3卷 205-211页

作者： Mohamed s. El naschie department of Physics University of Alexandria Alexandria Egypt

We reason that in quantum cosmology there are two kinds of energy. The first is the ordinary energy of the quantum particle which we can measure. The second is the dark energy of the quantum wave by quantum duality. Because measurement collapses the hawking-hartle quantum wave of the cosmos, dark energy cannot be detected or measured in any conventional manner. The quantitative results are confirmed using some exact solutions for the hydrogen atom. In particular the ordinary energy of the quantum particle is given by E(0) = (/2)(mc2) where is hardy’s probability of quantum entanglement, =( - 1)/2 is the hausdorff dimension of the zero measure thin cantor set modeling the quantum particle, while the dark energy of the quantum wave is given by E(d) = (5/2)(mc2) where is the hausdorff dimension of the positive measure thick empty cantor set modeling the quantum wave and the factor five (5) is the Kaluza-Klein spacetime dimension to which the measure zero thin cantor set d(0) = (0,) and the thick empty set d(-1) = (1,) must be lifted to give the five dimensional analogue sets namely and 5 needed for calculating the energy density E(0) and E(d) which together add to Einstein’s maximal total energy density E(total) = E(0) + E(d) = mc2 = E(Einstein). These results seem to be in complete agreement with the WMAP, supernova and recent Planck cosmic measurement as well as the 2005 quantum gravity experiments of v. v. Nesvizhersky and his associates. It also confirms the equivalence of wormhole solutions of Einstein’s equations and quantum entanglement by scaling the Planck scale.

关键词： Kaluza-Klein dark Energy Quantum Particle as Zero set Quantum Wave as an Empty set Quantum Gravity Experiments hawking-hartle Wave dark Energy of the Quantum Wave scaling the Planck scale Equivalence of Einstein-Rosen Bridges spooky Action at distance

Immunogenicity and Reactogenicity of vaccine Boosters after ***2.s Priming

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四川生理科学杂志 2021年第11期43卷 1861-1861页

作者： Roos s G sablerolles From the departments of Internal Medicine (R.s.G.s. M.L.) Hospital Pharmacy (R.S.G.S. W.J.R.R. P.H.M.K.) and Viroscience (D.G. K.S.S. M.P.G.K. C.H.G. R.D.V.) and the Department of Internal Medicine Division of Allergy and Clinical Immunology and Department of Immunology (V.A.S.H.D.) Erasmus University Medical Center Rotterdam the Center of Tropical Medicine and Travel Medicine Department of Infectious Diseases (A.G. H.M.G.G.) and the Department of Experimental Immunology Amsterdam University Medical Centers Amsterdam Institute for Infection and Immunity University of Amsterdam (N.A.K.) Amsterdam the Department of Internal Medicine and Infectious Diseases (D.F.P.) and the Department of Medical Microbiology and Infection Prevention University Medical Center Groningen University of Groningen (A.L.W.H. D.B.) Groningen the Department of Infectious Diseases Leiden University Medical Center Leiden (L.G.V.) and the Center for Infectious Disease Control National Institute for Public Health and the Environment Bilthoven (D.B.) - all in the Netherlands.

Background:The ***2.s vaccine,which was approved as a single-shot immunization regimen,has been shown to be effective against severe coronavirus disease ***,this vaccine induces lower severe acute respiratory syndrome coronavirus 2(sARs-cov-2)spike protein(s)-specific antibody levels than those induced by messenger Rna(mRna)-based *** immunogenicity and reactogenicity of a homologous or heterologous booster in persons who have received an ***2.s priming dose are unclear.

关键词： vaccine acute respiratory

solar Activity, solar Wind and Geomagnetic signatures

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Atmospheric and climate sciences 2013年第4期3卷 610-617页

作者： Jean-Louis Zerbo Frédéric Ouattara christine Amory Mazaudier Jean-Pierre Legrand John d. Richardson Ecole Normale supérieure de l’Université de Koudougou Koudougou Burkina Faso Institut national des sciences de l’Univers (INsU) Paris France Kavli Institute for Astrophysics and space Research Massachusetts Institute of Technology Cambridge USA LPP-Laboratoire de Physique des Plasmas/UPMc/Polytechnique/cNRs Saint-Maur-des-Fossés France Université Polytechnique de Bobo-dioulasso Bobo-Dioulasso Burkina Faso

The present study investigates solar events through geomagnetic activity and physical processes on the sun: 1) Quiet activity (QA) related to the slow solar wind, 2) Recurrent activity (RA) related to high and moderate speed solar wind streams from coronal holes, 3) shock activity (sA) identified by observations of sscs and 4) Unclear activity (UA) which contains all activity not covered by the first three cases. For recent cycles, we analyze and emphasize some important results: Quiet activity is predominant for cycle 23, comprising 40% of the total activity and over 80% of the activity near solar minimum. shock and recurrent activity contributions to total geomagnetic activity are largest in cycle 20. The most fluctuating events are observed during cycles 21 and 22. Throughout solar cycle 23, the contribution, from each type of activity, differs from recent solar cycles, with larger percentages of quiet and recurrent activity and less unclear activity. These percentages are similar to those in solar cycles observed in the late 1800s. since 1963, solar wind data are available. We analyze the distribution of the solar wind velocity for each geomagnetic class of activity and find that: 1) Within each activity type aa does not depend on v, 2) Approximately 80% of the solar wind has v s for QA and 80% of the solar wind has v > 450 km/s for RA, 3) sA and UA both have 60% of the solar wind v > 450 km/s. We found the following conditions for all four solar cycles: 1) For QA 95% of solar wind speeds are in the range 399 ± 69 km/s, 2) For RA 95% of the solar wind speeds range from 582 ± 110 km/s, 3) For sA 95% of the solar wind velocities are order of 482 ± 101.4 km/s, and 4) For UA 95% of solar wind speeds are 480 ± 85.82 km/s. These results confirm the classification scheme that QA reflects slow wind effects, RA effects high wind stream and UA answers to the fluctuations between high wind stream (~60%) and slow wind (~40%). The study shows that high wind stream (

关键词： solar Wind Geomagnetic Activity solar Activity Geomagnetic Index aa

An improved Lc–Ms/Ms method for the quantification of alverine and para hydroxy alverine in human plasma for a bioequivalence study

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Journal of Pharmaceutical Analysis 2017年第2期7卷 95-102页

作者： dhiraj M.Rathod Keyur R.Patel hiren N.Mistri Arvind G.Jangid Pranav s.shrivastav Mallika sanyal department of chemistry Kadi Sarva VishwavidyalayaGandhinagarAhmedabad-382015India Bioanalytical Research department Accutest Research LabBodakdevAhmedabad-380059India department of chemistry School of SciencesGujarat UniversityAhmedabad-380009India department of chemistry St.Xavier's CollegeNavrangpuraAhmedabad-380009India

A highly sensitive and selective high performance liquid chromatography–tandem mass spectrometry method was developed and validated for the quantification of alverine（ALv） and its active metabolite, para hydroxy alverine（PhA）, in human plasma. For sample preparation, solid phase extraction of analytes was performed on Phenomenex strata-X cartridges using alverine-d5 as the internal standard. The analytes were separated on symmetry shield RP18（150 mm×3.9 mm, 5 μm） column with a mobile phase consisting of acetonitrile and10 mM ammonium formate（65：35, v/v）. detection and quantitation was done by electrospray ionization mass spectrometry in the positive mode using multiple reaction monitoring. The assay method was fully validated over the concentration range of 15.0–15,000 pg/mL for ALv and 30.0–15,000 pg/mL for PhA. The intra-day and inter-day accuracy and precision（% cv） ranged from 94.00% to 96.00% and 0.48% to 4.15% for both the analytes. The mean recovery obtained for ALv and PhA was 80.59% and 81.26%, respectively. Matrix effect,expressed as Is-normalized matrix factor ranged from 0.982 to 1.009 for both the analytes. The application of the method was demonstrated for the specific analysis of ALv and PhA for a bioequivalence study in 52 healthy subjects using 120 mg ALv capsules. The assay reproducibility was also verified by reanalysis of 175 incurred subject samples.

关键词： Alverine Para hydroxy alverine Liquid chromatography–tandem mass spectrometry Bioequivalence study human plasma

负荷双能cT定量心肌灌注的初步经验:正常、缺血及梗死心肌的碘浓度差异

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国际医学放射学杂志 2016年第6期 705-705页

作者： c.d.sánchez-Gracián R.O.Pernas c.T.López E.s.Armentia A.v.Liste M.v.caama?o 张璋 Radiology department Povisa Hospital

摘要目的将MRI作为参考标准,探讨使用负荷双能cT(dEcT-s)心肌灌注得到的碘浓度值能否用于鉴别正常、缺血及梗死心肌。方法本回顾性研究经过本单位伦理委员

关键词：梗死心肌碘浓度 cT 心肌灌注双能差异