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Surface roughness of zirconia for full-contour crowns after clinically simulated grinding and polishing

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International Journal of Oral Science 2014年第4期6卷 241-246页

作者： Rim Hmaidouch wolf-Dieter mller Hans-Christoph Lauer Paul Weigl Department of Prosthodontics and Geriatric Dentistry Faculty of Oral and Dental Medicine at Johann Wolfgang Goethe-University Department of Prosthodontics and Geriatric Dentistry University of Medicine Charite Department of Postgraduate Education Faculty of Oral and Dental Medicine at Johann Wolfgang Goethe-University

The aim of this study was to evaluate the effect of controlled intraoral grinding and polishing on the roughness of full-contour zirconia compared to classical veneered zirconia. Thirty bar-shaped zirconia specimens were fabricated and divided into two groups（n515）. Fifteen specimens（group 1） were glazed and 15 specimens（group 2） were veneered with feldspathic ceramic and then glazed. Prior to grinding,maximum roughness depth（Rmax） values were measured using a profilometer, 5 times per specimen. Simulated clinical grinding and polishing were performed on the specimens under water coolant for 15 s and 2 N pressure. For grinding, NTI diamonds burs with grain sizes of 20 mm, 10 mm, and 7.5 mm were used sequentially. The ground surfaces were polished using NTI kits with coarse, medium and fine polishers. After each step, Rmaxvalues were determined. Differences between groups were examined using one-way analysis of variance（ANOVA）. The roughness of group 1 was significantly lower than that of group 2. The roughness increased significantly after coarse grinding in both groups. The results after glazing were similar to those obtained after fine grinding for non-veneered zirconia. However, fine-ground veneered zirconia had significantly higher roughness than venerred, glazed zirconia. No significant difference was found between fine-polished and glazed zirconia, but after the fine polishing of veneered zirconia, the roughness was significantly higher than after *** can be concluded that for full-contour zirconia, fewer defects and lower roughness values resulted after grinding and polishing compared to veneered zirconia. After polishing zirconia, lower roughness values were achieved compared to glazing; more interesting was that the grinding of glazed zirconia using the NTI three-step system could deliver smooth surfaces comparable to untreated glazed zirconia surfaces.

关键词： full-contour zirconia grinding polishing roughness veneering porcelain

Reconstructing landscapes of ungulate parturition and predation using vegetation phenology

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Current Zoology 2022年第3期68卷 275-283页

作者： Paige VAN DE VUURST Seth A.mOORE Edmund J.ISAAC Yvette CHENAUX-IBRAHIm Tiffany m.wolf Luis E.ESCOBAR Department of Fish and Wildlife Conservation Virginia TechBlacksburgVA 24061USA Department of Biology and Environment Grand Portage Band of Lake Superior ChippewaGrand PortageMN 55605USA Veterinary Population medicine University of MinnesotaSt PaulMN 55108USA

Enhanced vegetation index(EVI)data can be used to identify and define the space in which ungulates practice parturition and encounter *** study explores the use of EVI data to identify landscapes linked to ungulate parturition and predation events across space,time,and environmental *** a case study,we used the moose population(Alces alces)of northern minnesota in the *** remotely sensed EVI data rasters and global positioning system collar data,we quantified how vegetation phenology and moose movement shaped the births and predation of 52 moose calves from 2013 to 2020 on or adjacent to the Grand Portage Indian *** known sources of predation were American black bears(Ursus americanus,n=22)and gray wolves(Canis lupus,n=28).Satellite-derived data summarizing seasonal landscape features at the local level revealed that landscape heterogeneity use by moose can help to quantitatively identify landscapes of parturition and predation in space and time across large *** phenology proved to be differentiable between adult moose ranges,sites of cow parturition,and sites of calf *** characteristics of each moose group were consistent and tractable based on environment,suggesting that sites of parturition and predation of moose are predictable in space and *** is possible that moose selected specific landscapes for parturition despite risk of increased predation of their calves,which could be an example of an"ecological trap."This analytical framework can be employed to identify areas for future ungulate research on the impacts of landscape on parturition and predation dynamics.

关键词： bear EVI moose parturition predation prey vegetation phenology

Differences in mean Number of Consonant-Vowel-Consonant Words Decoded between Letter-Sound Readers and Non Letter-Sound Readers

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Open Journal of Nursing 2014年第6期4卷 409-450页

作者： Gail m. wolf Oregon Health & Science University Portland Oregon USA

Children’s failure to develop simple word decoding skills in early years is linked to future poor reading, school dropout, and poor health [1] [2]. Letter-sound knowledge is needed for word decoding development;however questions remain on what types of letter-sound knowledge help children decode simple words [3]. This study investigated the differences in mean number of consonant-vowel-consonant (CVC) words decoded between two groups of children, a letter-sound reading group and non letter-sound reading group. Children aged 4 to 6 in both groups, attempted to decode a variety of simple words such as tan, sit, hen, pig, dot, and fun. Analysis determined word decoding differences existed between the two groups. The alternate hypothesis was accepted;the letter-sound reading group had a significantly higher mean in number of consonant-vowel-consonant words decoded compared to the non letter-sound reading group. The study informs the teaching approaches needed to improve early decoding skills showing letter-sound reading ability is an important step for learning to decode simple consonant-vowel-consonant words.

关键词： Letter-Sound Reading Decoding Automaticity Practicing Reading

The Earth’s Thermodynamic Carbon-Hydrogen-Oxygen System and its Significance for the Chemical and Energy Sectors

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The Earth’s Thermodynamic Carbon-Hydrogen-Oxygen System and...

A new oxidative pathway of nitric oxide production from oximes in plants

2004年国际氢能大会

作者： B.m.wolf Dr. managing Partner Choren Industries GmbH Freiberg Germany

＜正＞The sun carries on a carbon cycle on earth through the process of photosynthesis and produces biomass from carbon dioxide and water while releasing oxygen. One part of the biomass was deposited and carbonized into fossil fuels. But the supplies of fuel created in this manner are finite, using them increases the carbon dioxide partial pressure in the atmosphere and this is affecting our climate. Suggestions are made to imitate the natural process of fuel production by utilizing carbon dioxide or biomass as the carbon carrier and hydrogen produced from water electrolysis using renewable energy sources to provide the electrical *** achieve this, Choren Industries GmbH in Germany is presenting its technical model for manufacturing renewable synthetic fuels. A description of the technical apparatus is provided and the initial practical results from testing the fuel in road traffic are presented.

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molecular Plant 2024年第1期17卷 178-198页

作者： Pedro Lopez-Gomez Javier Buezo marina Urra Alfonso Cornejo Raquel Esteban Jorge Fernandez de los Reyes Estibaliz Urarte Estefania Rodriguez-Dobreva Alejandro Chamizo-Ampudia Alejandro Eguaras Sebastian wolf Daniel marino Victor martinez-merino Jose F.moran Institute for multidisciplinary Research in Applied Biology(ImAB) Department of SciencesPublic University of Navarre(UPNA)Avda.de Pamplona 12331192 MutilvaSpain Institute for Advanced materials and mathematics(INAmAT2) Department of SciencesPublic University of Navarre(UPNA)Campus de Arosadia31006 PamplonaSpain Department of Plant Biology and Ecology University of the Basque Country(UPV/EHU)Sarriena s/nApdo.64448080 BilbaoSpain Center for Plant molecular Biology(ZmBP) University of TubingenGeschwister-Scholl-Platz72074 TubingenGermany Institute of Natural Resources and Agrobiology of Salamanca(IRNASA) Department of Plant-Microorganism InteractionsSpanish National Research Council(CSIC)Cordel de Merinas40-5237008SalamancaSpain Department of Biochemistry Area of Molecular BiologyVeterinary FacultyUniversity of LeonCampus de Vegazanas/n.24071 LeonSpain

Nitric oxide(NO)is an essential reactive oxygen species and a signal molecule in *** several studies have proposed the occurrence of oxidative NO production,only reductive routes for NO production,such as the nitrate(NO_(3)^(-))-upper-reductase pathway,have been evidenced to date in land ***,plants grown axenically with ammonium as the sole source of nitrogen exhibit contents of nitrite and NO3−,evidencing the existence of a metabolic pathway for oxidative production of *** hypothesized that oximes,such as indole-3-acetaldoxime(IAOx),a precursor to indole-3-acetic acid,are intermediate oxidation products in NO *** detected the production of NO from IAOx and other oximes catalyzed by peroxidase(POD)enzyme using both 4-amino-5-methylamino-2′,7′-difluorescein fluorescence and *** stimulated the reaction,while superoxide dismutase inhibited ***,mouse NO synthase can also use IAOx to produce NO at a lower rate than *** provided a full mechanism for POD-dependent NO production from IAOx consistent with the experimental data and supported by density functional theory *** showed that the addition of IAOx to extracts from medicago truncatula increased the in vitro production of NO,while in vivo supplementation of IAOx and other oximes increased the number of lateral roots,as shown for NO donors,and a more than 10-fold increase in IAOx dehydratase ***,we found that in vivo supplementation of IAOx increased NO production in Arabidopsis thaliana wild-type plants,while prx33-34 mutant plants,defective in POD33-34,had reduced *** data show that the release of NO by IAOx,as well as its auxinic effect,explain the superroot ***,our study reveals that plants produce NO utilizing diverse molecules such as oximes,POD,and flavins,which are widely distributed in the plant kingdom,thus introducing a long-awaited oxidative pathway to NO production in plants.T

关键词： ammonium oxidation auxin nitric oxide oxime peroxidase root phenotype

mALDI-TOF mass Spectrometric Analysis of Brain Tumor Cyst Fluid Reveals a Protein Peak Corresponding to ApoC1 and LuzP6

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作者： m.·沃尔夫(m. wolf)

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Open Journal of modern Neurosurgery 2018年第3期8卷 251-263页

作者： mathias Groll Jochen Frenzel matthias Krause Anne Schanzer wolf müller Klaus Eschrich Ulf Nestler Department of Neurosurgery University Hospital LeipzigLeipzigGermany Rudolf-Schonheimer-Institute of Biochemistry Medical FacultyUniversity of LeipzigLeipzigGermany Institute of Neuropathology Justus Liebig University GiessenGiessenGermany Institute of Neuropathology University Hospital LeipzigLeipzigGermany

Objectives: SELDI-TOF and mALDI-TOF mass spectrometry (mS) are laser desorption technologies that allow for proteomic examination of molecular masses in small amounts of samples. In a precedent study, the feasibility of SELDI-TOF mS assessment of proteins in cerebrospinal fluid and tumor cyst fluid had been shown. In the present study, we analyzed whether mALDI-TOF mS examination of these fluids leads to comparable results. methods: During neurosurgical intervention, cyst fluids from 24 glioblastomas and 15 metastases were collected. As control, cerebrospinal fluid samples from 23 patients were obtained. The samples were prepared using a protocol optimized for mALDI-TOF mS. mass spectra were recorded and peaks were extracted, characterized by masses and relative intensities. These peaks were analyzed for statistically significant differences between the diagnosis groups and compared to SELDI-TOF mS data. Results: 41 protein peaks known from the SELDI-TOF mS analysis could be confirmed by mALDI-TOF mS, and the cellular expression of the proteins LuzP6 and ApoC1, corresponding to the protein peaks 6433 and 6632, was shown immunohistochemically in glioblas-toma tissue. The mALDI-TOF spectrometry extends the range of analysis down to 1.4 kDa, whereas the upper detection limit lies below 23 kDa. Discussion: The presented proteomic approach yields an inventory of protein masses, found in the tumor cyst at the time of puncture. It does not reveal pathophysiologic, metabolic or secretory pathways that lead to the presence of proteins in the cyst. These have to be assessed immunohistochemically or on mRNA level in the surrounding tumor cells. Conclusion: mALDI-TOF mS of tumor cyst fluid discloses protein sizes, overexpressed or lost in tumor tissue. A thorough proteomic work-up is needed to identify the underlying proteins and metabolic pathways.

关键词： Cerebrospinal Fluid Cerebral metastasis Glioblastoma mass Spectrometry Tumor Cyst

SPRAY RETENTION ON GREEN FOXTAIL （SETARIA VIRIDIS） USING AIRBRUSH AND BROADCAST SPRAYERS AND ITS ImPACT ON THE EFFICACY OF A mYCOHERBICIDE AGENT

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SPRAY RETENTION ON GREEN FOXTAIL （SETARIA VIRIDIS） USING A...

The 18th Asian-Pacific Weed Science Society Conference

作者： G.Peng T.m.wolf K.N.Byer B.Caldwell Agriculture and Agri-Food Canada Saskatoon Research Center107 Science PlaceSaskatoonSaskatchewanCanadaS7N 0X2

＜正＞It was previously observed that broadcast spraying of a foliar mycoherbicide agent（94-409A） on green foxtail at volumes ranging from 100 to 800 L/ha did not achieve the same level of control as did airbrush spraying to the point of *** addition,regardless of application method,the youngest and erect top leaf often showed least damage in comparison to older leaves,and plant regrowth often occurred. Several contributing factors may be involved,including lower actual application volumes of the broadcast spray and possible physical effects due to the force of the airbrush *** were conducted to compare the spray retention of different application methods,to examine the retention on different leaves of green foxtail,and to improve the retention efficiency and biocontrol efficacy through selection of nozzle, travel speed,spore concentration,and *** retention using various application methods was determined by measuring a tracer dye（Rhodamine WT） in spray solutions using fluorescence *** biocontrol efficacy,spore suspensions of the fungal agent were applied to the plant foliage at predetermined concentrations and the inoculated plants were given a period of dew prior to being returned to the *** severity and plant fresh weight were measured one week after the treatment as efficacy *** achieve the same retention volume as that of run-off airbrush spray,an application volume around 2,000 L per hectare was required with a Tee-Jet XR-8004 *** retention on the top leaf was similar to that on lower leaves on a leaf dry matter *** broadcast spray providing equivalent retention as airbrush inoculation resulted in comparable control of green foxtail, reducing plant fresh wish by more than 90%when compared to non-treated controls. Droplet size,nozzle angle,and travel speed appear to have variable effects on the spray retention,and subsequently on the efficacy of weed *** the conce

关键词： Spray retention biological control and green foxtail

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神经病病例研究

神经病病例研究