检索结果-南通市图书馆

Scanning electron microscope as a flexible tool for investigating the properties of UV-emitting nitride semiconductor thin films

在线全文

学校读者我要写书评

暂无评论

Photonics Research 2019年第11期7卷 I0017-I0026页

作者： C.Trager-Cowan A.Alasmari W.Avis J.Bruckbauer P.R.Edwards B.Hourahine S.Kraeusel G.Kusch R.Johnston G.Naresh-Kumar R.W.Martin M.Nouf-Allehiani E.Pascal L.Spasevski D.Thomson S.Vespucci P.J.Parbrook M.D.Smith J.Enslin F.Mehnke M.Kneissl C.Kuhn T.Wernicke S.Hagedorn a.knauer V.Kueller S.Walde M.Weyers P.-M.Coulon P.A.Shields Y.Zhang L.Jiu Y.Gong R.M.Smith T.Wang A.Winkelmann Department of physics supauniversity of strathclydeglasgow G4 onguk Tyndall national institute university college corkcork t12 r5cpireland Institute of solid state physics lechnische universitat berlin10623 berlingermany Ferdinand-braun-lnstitut leibniz-lnstitut fur hochstfrequenztechnik12489 berlingermany Department of electronic and electrical engineering centre of nanoscience&nanotechnologyuniversity of bathbath ba27ayuk Department of electronic and electrical engineering university of sheffieldsheffield s13jduk Laser components department laser zentrum hannover 5.v.30419 hannovergermany

In this paper we describe the scanning electron microscopy techniques of electron backscatter diffraction, electron channeling contrast imaging, wavelength dispersive X-ray spectroscopy, and cathodoluminescence hyperspectral imaging. We present our recent results on the use of these non-destructive techniques to obtain information on the topography, crystal misorientation, defect distributions, composition, doping, and light emission from a range of UV-emitting nitride semiconductor structures. We aim to illustrate the developing capability of each of these techniques for understanding the properties of UV-emitting nitride semiconductors, and the benefits were appropriate, in combining the techniques.

关键词： electron nitride doping

Psychiatric comorbidities in cancer survivors across tumor subtypes:A systematic review

在线全文

学校读者我要写书评

暂无评论

World Journal of Psychiatry 2022年第4期12卷 623-635页

作者： Anne Bach Klara.knauer Johanna Graf Norbert Schäffeler Andreas Stengel Section Psychooncology Department of Psychosomatic Medicine and PsychotherapyUniversity Hospital TübingenTübingen 72076Germany Germany&CharitéCenter for Internal Medicine and Dermatology Department for Psychosomatic MedicineCharite-Universitätsmedizin BerlinCorporate Member of Freie Universität BerlinHumboldt-Universität zu Berlin and Berlin Institute of HealthBerlin 10117Germany

BACKGROUND Psychiatric disorders are common but underdiagnosed in cancer *** suggests that tumor type has an effect on the prevalence of clinically relevant depression,anxiety,comorbid anxiety-depression and posttraumatic stress disorder(PTSD).AIM To identify studies that examined the prevalence of clinically relevant levels of depression,anxiety,comorbid anxiety-depression and PTSD for patients with one or more tumor sites and compare those prevalences between cancer *** Four databases(PubMed,PsycInfo,PubPsych and the Cochrane Database)were searched and resulted in a total of 2387 articles to be *** be included,a study must have investigated cancer-free and posttreatment survivors using tools to assess clinically relevant levels of the listed psychiatric *** articles were screened by two authors with a third author reviewing debated *** Twenty-six studies on ten different tumor types fulfilled all inclusion criteria and were included in the *** studies showed heterogeneity regarding the study characteristics,number of participants,time since diagnosis,and assessment ***,all four comorbidities show higher prevalences in cancer survivors than the general *** tumor survivors were reported to have a relatively high prevalence of both depression and *** with melanoma survivors reported high prevalences of all four psychiatric *** comorbidities,a wide range in prevalence existed across the tumor *** one cancer site,the prevalence also varied considerably among the *** Psychiatric comorbidities are more frequent in cancer survivors than in the general population,as reflected by the prevalence of depression,anxiety,comorbid anxiety-depression and PTSD across all tumor *** generalized screening tools that examine psychological distress in cancer survivors up to at least ten years after diagnosis could help to

关键词： Cancer survivor Cancer type Prevalence Psychiatric disorder Psychiatric comorbidity Survivorship Tumor site

Associations between Sow Body Condition with Subsequent Reproductive Performance

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Open Journal of Animal Sciences 2023年第3期13卷 310-322页

作者： Miranda R. Authement Mark T. knauer Department of Animal Sciences North Carolina State University Raleigh NC USA

The objective was to quantify relationships between sow body condition and subsequent reproduction. Multiparous sows were measured at breeding (n = 1571) and farrowing (n = 887) on a commercial farm in eastern North Carolina. Sow body condition measures included: sow body condition caliper (CS), weight (BW), backfat, longissimus muscle area (LMA) and visual body condition score (BCS). Sow production traits were: number born alive (NBA), litter birth weight (LBW), number weaned (NW), piglet survival (PS), litter weaning weight (LWW), wean-to-conception interval (WCI), farrowing rate and lactation average daily feed intake. Data were analyzed in SAS using PROC GLM for continuous traits and PROC GLIMMIX for categorical traits. Breeding CS had a curvilinear relationship (P 0.05) with NBA, LBW, NW, PS and WCI, with a CS of 15 being optimal for NBA, NW and PS and 14 ideal for LBW and WCI. Breeding LMA had a curvilinear relationship (P 0.05) with PS, with 51.5 cm2 maximizing survival. Breeding BCS had a curvilinear relationship (P 0.05) with NBA, LBW, NW, PS and WCI, with 3.2 being optimal for NBA, NW and WCI and 3.0 ideal for LBW and PS. Farrowing CS had a curvilinear relationship (P 0.05) with NW and PS, with 15 being optimal. Farrowing BCS had a curvilinear relationship (P 0.05) with NW and PS, with 3.6 being ideal. Farrowing BW had a curvilinear relationship (P 0.05) with LWW and PS, with a BW of 220 and 210 kg, respectively, being optimal. Farrowing LMA had a curvilinear relationship (P 0.05) with WCI, with 51.6 cm2 being ideal. Results provide sow body condition targets to maximize reproductive throughput. The present study suggests feeding sows to a target sow body condition caliper score of 14 to 15 (representing a back angle of 130˚ to 132.5˚) to maximize sow productivity.

关键词： Backfat Body Condition Reproduction Sow Sow Caliper

Associations between Sow Body Lesions with Body Condition and Subsequent Reproductive Performance

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Open Journal of Veterinary Medicine 2023年第7期13卷 111-121页

作者： Miranda R. Authement Mark T. knauer Department of Animal Sciences North Carolina State University Raleigh USA

The objective was to determine the association between foot, leg, vulva and shoulder lesions with body condition and reproduction in group housed sows. Whiteline sows (n = 887) were measured before farrowing and at weaning at a commercial farm in eastern North Carolina. Foot and leg abnormalities included cracked hooves, toe length differences, overgrown hooves and locomotion. Vulva lesions were scored no lesion or lesion present. Shoulder lesions were scored no lesion, abrasion or open wound. Sow body condition measures included the knauer sow caliper (CS), body weight (WT), visual body condition score (BCS), backfat (BF) and longissimus muscle area (LMA). Sow production traits included number born alive, litter birth weight, number weaned, litter weaning weight, piglet survival (number weaned ÷ (total number born + net transfer)), wean-to-conception interval and average daily lactation feed intake. Data were analyzed in SAS using PROC GLM for continuous traits and PROC GLIMMIX for categorical traits. Vulva lesions were recorded on 17.6% of sows at farrowing and 0% at weaning. No shoulder lesions, abrasions and open wounds were recorded on 100%, 0% and 0%, respectively, of sows at farrowing and 73%, 21% and 6%, respectively, at weaning. Foot and leg abnormalities were not associated with body condition or reproduction. Vulva lesions at farrowing were associated with lower CS, WT, BCS and BF at farrowing, and reduced piglet survival (4.3%). Lower CS at farrowing was associated with increased shoulder abrasions and open wounds at weaning. Backfat and BCS at farrowing had curvilinear associations with shoulder lesions at weaning, a BF of 39 mm and a BCS of 4.2 minimizing lesions. Results suggest vulva and shoulder lesions were associated with thinner sows at farrowing and vulva lesions at farrowing were associated with lower piglet survival.

关键词： Caliper Productivity Shoulder Sow Vulva

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

私人妨害原则与相邻权、地役权

清华大学学报（哲学社会科学版） 2003年第1期18卷 64-68页

作者： Nancy J. knauer 葛英姿天普大学比斯利法学院清华大学法学院

文章剖析了英美物权法上“使用权”的概念 ,并解释了财产权就像“权利集束”这个常用比喻 ,并对美国普通法上财产法中的有关相邻方之间土地纠纷的法规进行了比较分析 ,其中特别比较了普通法上的私人妨害原则和中国物权法草案第 9章所规... 详细信息

文章剖析了英美物权法上“使用权”的概念 ,并解释了财产权就像“权利集束”这个常用比喻 ,并对美国普通法上财产法中的有关相邻方之间土地纠纷的法规进行了比较分析 ,其中特别比较了普通法上的私人妨害原则和中国物权法草案第 9章所规定的相邻权的概念 ,并将普通法体系中的各种私人土地使用协议和地役权与中国物权法草案第 16章的内容进行了对比。

关键词：使用权私人妨害原则相邻权地役权物权法

Physical Conditions of Cull Sows Associated with On-Farm Production Records

在线全文

学校读者我要写书评

暂无评论

Open Journal of Veterinary Medicine 2012年第3期2卷 137-150页

作者： Mark knauer Ken Stalder Tom Baas Colin Johnson Locke Karriker Department of Animal Science Iowa State University Ames USA Department of Animal Science North Carolina State University Raleigh USA Veterinary Diagnostic and Production Animal Medicine Department Ames USA

Cull sow physical conditions were associated with on-farm production records. Sows (923) within one integrated U.S. production system were evaluated at two harvest facilities. Physical conditions evaluated at harvest were analyzed by parity, culling code and production measures. Farm culling codes were categorized into poor body condition (BC), old age (G), lameness (L), other (O), poor litter performance (P) and reproductive failure (R). Production measures included lifetime pigs born alive (LPBA), pigs born alive in the last litter (PBALL), pigs per sow per year (PSY) and weaning to culling interval. The L culling code had a greater (P < 0.05) prevalence of cracked hooves when compared to the other five culling codes (30.9% vs. 18.7%). Sows without front cracked hooves tended (P = 0.07) to have greater PSY (0.80) when compared to sows having front cracked hooves. Females without rear digital overgrowth had more (P < 0.05) PBALL (0.54) and tended (P = 0.06) to have increased PSY (0.80) when compared to sows with rear digital overgrowth. Sows without shoulder lesions had greater (P < 0.05) LPBA (2.01) when compared to sows with shoulder lesions. Regression coefficient estimates for percent lung lesion involvement were positive and tended (P < 0.10) to be different from zero for LPBA (0.06) and PSY (0.03). Females with severe teeth wear tended (P ≤ 0.10) to have fewer LPBA (1.36), PBALL (0.45) and had fewer (P < 0.01) PSY (1.10) when compared to sows without severe teeth wear. Sows culled for BC and L had lower (P < 0.01) backfat when compared to sows from the other four culling codes (1.83 and 2.04 cm vs. 2.47 to 2.85 cm, respectively). Multiple cull sow physical conditions evaluated at harvest had associations with on-farm reproductive measures.

关键词： Cull Productivity Sow

TFIIA transcriptional activity is controlled by a ＇cleave-and-run＇ Exportin-1/Taspase 1-switc

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Molecular Cell Biology 2018年第1期10卷 33-47页

作者： Christian Schrenk Verena Fetz Cecilia Vallet Christina Heiselmayer Elisabeth Schroder Astrid Hensel Angelina Hahlbrock Desiree Wunsch Dorothee Goesswein Carolin Bier Negusse Habtemichael Gunter Schneider Roland H. Stauber Shirley K. knauer Molecular and Cellular Oncology/ENT University Hospital of Mainz 55101 Mainz Germany Molecular Biology Centre for Medical Biotechnology (ZMB) University Duisburg-Essen 45141 Essen Germany University Hospital Klinikum rechts der Isar II. Medizinische Klinik Technical University Mfinchen 81675 Munich Germany

Transcription factor TFIIA is controlled by complex regulatory networks including proteolysis by the protease Taspase 1, though the full impact of cleavage remains elusive. Here, we demonstrate that in contrast to the general assumption, de novo produced TFIIA is rapidly confined to the cytoplasm via an evolutionary conserved nuclear export signal （NES, amino acids ^21VINDVRDIFL^30）, interacting with the nuclear export receptor Exportin-1/chromosomal region maintenance 1 （Crml）. Chemical export inhibition or genetic inactivation of the NES not only promotes TFIIA＇s nuclear localization but also affects its transcrip- tional activity. Notably, Taspase 1 processing promotes TFIIA＇s nuclear accumulation by NES masking, and modulates its tran- scriptional activity. Moreover, TFIIA complex formation with the TATA box binding protein （TBP） is cooperatively enhanced by inhibition of proteolysis and nuclear export, leading to an increase of the ceil cycle inhibitor p16INK, which is counteracted by pre- vention of TBP binding. We here identified a novel mechanism how proteolysis and nuclear transport cooperatively fine-tune tran- scriptional programs.

关键词： cdnka2 cell cycle Crml nuclear export proteolysis TBP

Smartline-the smartest way to do HPLC

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Smartline-the smartest way to do HPLC

Current-induced degradation and lifetime prediction of 310 nm ultraviolet light-emitting diodes

第六届化学工程与生物技术展览暨会议

作者： Dr.Christian Schmidt knauer GmbH Hegauer Weg 38 14163 Berlin

＜正＞ With the Smartline, knauer introduces a completely new product line, combining theexperience of more than three decades of developing instruments for HPLC with the mostmodern technology available. Throughout its conception, the many suggestions from andrequirements of our customers were continually implemented.

关键词：

来源： cnki会议 cnki会议评论

在线全文

学校读者我要写书评

暂无评论

Photonics Research 2019年第7期7卷 14-18页

作者： Jan Ruschel Johannes Glaab Batoul Beidoun Neysha Lobo Ploch Jens Rass Tim Kolbe Arne knauer Markus Weyers Sven Einfeldt Michael Kneissl Ferdinand-Braun-Institut Leibniz-Institut fur HochstfrequenztechnikGustav-Kirchhoff-Str.412489 BerlinGermany Technische Universitat Berlin Institut fur FestkorperphysikHardenbergstr.36EW6-710623 BerlinGermany

The impact of operation current on the degradation behavior of 310 nm UV LEDs is investigated over 1000 h of stress. It ranges from 50 to 300 mA and corresponds to current densities from 34 to 201 A/cm^*** separate the impact of current from that of temperature, the junction temperature is kept constant by adjusting the heat sink temperature. Higher current was found to strongly accelerate the optical power reduction during operation. A mathematical model for lifetime prediction is *** indicates that lifetime is inversely proportional to the cube of the current density, suggesting the involvement of Auger recombinati on.

关键词： degradation light-emitting diodes lifetime