检索结果-南通市图书馆

Neural Regeneration Research 2016年第2期11卷 338-344页

作者： Theodora Manoli Jennifer Lynn Schiefer Lukas Schulz Thomas Fuchsberger hans-eberhard schaller Department of Hand Plastic and Reconstructive Surgery Burn Unit BG Trauma Center University of Tuebingen

The influence of duration of immobilization and postoperative sensory re-education on the final outcome after reconstruction of digital nerves with direct suture or muscle-in-vein conduits was investigated. The final sensory outcome of 35 patients with 41 digital nerve injuries, who either underwent a direct suture（DS） or a nerve reconstruction with muscle-in-vein conduits（MVC）, was assessed the earliest 12 months postoperatively using static and moving two-point discrimination as well as Semmes-Weinstein monofilaments. There was no significant difference in sensory recovery in cases with an immobilization of 3–7 days versus 10 days in the DS or MVC group. Moreover, no statistically significant difference in sensory recovery was found in cases receiving postoperative sensory re-education versus those not receiving in the DS or MVC group. An early mobilization does not seem to have a negative impact on the final outcome after digital nerve reconstruction. The effect of sensory re-education after digital nerve reconstruction should be reconsidered.

关键词： nerve regeneration peripheral nerve digital nerve sensory re-education immobilization digital direct suture muscle-in-vein conduits

Comparison of short- with long-term regeneration results after digital nerve reconstruction with musclein-vein conduits

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2015年第10期10卷 1674-1677页

作者： Jennifer Lynn Schiefer Lukas Schulz Rebekka Rath Stéphane Stahl hans-eberhard schaller Theodora Manoli Department of Hand Plastic and Reconstructive Surgery with Burn Center BG Trauma Center University of Tuebingen

Muscle-in-vein conduits are used alternatively to nerve grafts for bridging nerve defects. The purpose of this study was to examine short- and long-term regeneration results after digital nerve reconstruction with muscle-in-vein conduits. Static and moving two-point discriminations and Semmes-Weinstein Monofilaments were used to evaluate sensory recovery 6–12 months and 14–35 months after repair of digital nerves with muscle-in-vein in 7 cases. Both follow-ups were performed after clinical signs of progressing regeneration disappeared. In 4 of 7 cases, a further recovery of both two-point discriminations and in another case of only the static two-point discrimination of 1–3 mm could be found between the short-term and long-term follow-up examination. Moreover, a late recovery of both two-point discriminations was demonstrated in another case. Four of 7 cases showed a sensory improvement by one Semmes-Weinstein Monofilaments. This pilot study suggests that sensory recovery still takes place even when clinical signs of progressing regeneration disappear.

关键词： peripheral nerve regeneration muscle-in-vein conduits digital nerves sensory recovery Semmes-Weinstein two-point discrimination outcome short-term long-term

Evaluation of bone remodeling in regard to the age of scaphoid non-unions

在线全文

学校读者我要写书评

暂无评论

World Journal of Orthopedics 2016年第7期7卷 418-425页

作者： Susanne Rein Uwe Hanisch hans-eberhard schaller hans Zwipp Stefan Rammelt Stefan Weindel Department of Plastic and Hand Surgery Burn UnitTrauma Center Bergmannstrost Center of Orthopaedics and Traumatology University Medicine "Carl Gustav Carus" DresdenTechnicalUniversity Dresden Institute of Pathology "Carl Thiem" Hospital Deptartment of Plastic Hand Reconstructive and Burn SurgeryTrauma Center Tuebingen University Deptartment of Hand Aesthetic and Plastic SurgeryHospital of Linth

AIM: To analyse bone remodeling in regard to the age of scaphoid non-unions(SNU) with ***: Thirty-six patients with symptomatic SNU underwent surgery with resection of the pseudarthrosis. The resected material was evaluated histologically after staining with hematoxylin-eosin(HE), tartrate resistant acid phosphatase(TRAP), CD 68, osteocalcin(OC) and osteopontin(OP). Histological examination was performed in a blinded ***: The number of multinuclear osteoclasts in the TRAP-staining correlated with the age of the SNU and was significantly higher in younger SNU(P = 0.034; r = 0.75). A higher number of OP-immunoreactive osteoblasts significantly correlated with a higher number of OC-immunoreactive osteoblasts(P = 0.001; r = 0.55). Furthermore, a greater number of OP-immunoreactive osteoblasts correlated significantly with a higher number of OP-immunoreactive multinuclear osteoclasts(P = 0.008; r = 0.43). SNU older than 6 mo showed a signifi-cant decrease of the number of fibroblasts(P = 0.04). Smoking and the age of the patients had no influence on bone remodeling in ***: Multinuclear osteoclasts showed a significant decrease in relation to the age of SNU. However, most of the immunhistochemical findings of bone remodeling do not correlate with the age of the SNU. This indicates a permanent imbalance of bone formation and resorption as indicated by a concurrent increase in both osteoblast and osteoclast numbers. A clear histological differentiation into phases of bone remodeling in SNU is not possible.

关键词： Bone remodeling Histology Immunohistological staining Scaphoid non-union Scaphoid Wrist joint

REGENERATION FACTOR 1, a peptide boost for wound healing and plant biotechnology

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Molecular Plant 2024年第9期17卷 1333-1334页

作者： Andreas schaller University of Hohenheim Department of Plant Physiology and Biochemistry70593 StuttgartGermany

Plants respond to wounding such as caused by insect herbivores by activating their defenses and thus increasing their resistance against attacking pests and opportunistic pathogens(Howe and schaller,2008).The phenomenon was first described more than 50 years ago by Green and Ryan,who reported that wounding triggers tomato and potato plants to produce proteinase inhibitors that inhibit digestive proteases in the gut of leaf-eating insects to starve them of nutrients(Green and Ryan,1972).They also observed that the accumulation of proteinase inhibitors is not restricted to wounded leaves but occurs throughout the aerial parts of the *** search for a chemical signal that is released locally in response to wounding and that mediates systemic activation of defense gene expression led to the identification of systemin,the first ever peptide with hormonelike activity in plants(Pearce et al.,1991).These seminal findings sparked much research into systemic defense responses and peptide signaling in general,and we know now that systemin is one of many phytocytokines that regulate a multitude of immune responses in plants(Schilmiller and Howe,2005;Gust et al.,2017).

关键词： wound activation defense

Seasonal movements of American horseshoe crabs Limulus polyphemus in the Great Bay Estuary,New Hampshire (USA)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Current Zoology 2010年第5期56卷 587-598页

作者： Susanne Y schaller Christopher C.CHABOT Winsor H.WATSON Ⅲ Department of Biological Sciences University of New Hampshire Department of Biology Plymouth State University

The goal of this study was to determine the year round movement patterns of American horseshoe crabs, Limulus polyphemus, in the Great Bay Estuary, New Hampshire （USA） by using acoustic telemetry to track the movements of 37 adult Limulus, for periods ranging from 2 to 31 months. During the winter （December-March） horseshoe crabs moved very little. In the spring, when water temperatures exceeded II^C, horseshoe crabs moved at least 1 km further up into the estuary to shallower subtidal areas about a month prior to spawning. The mean distance traveled during spring migrations was 2.6 ＋ 0.5 （n=20） km up the estuary. Mating occurred in May and June and during these months animals spent most of their time in shallow subtidal areas adjacent to mating beaches. In the summer （July-Augnst）, animals moved 1.5 ± 0.5 （n=26） km down the estuary, towards the ocean, and ranged widely, using extensive portions of the estuary. In the fall （September-November） movement was more limited （0.5 ± 0.5 km; n = 24） while animals settled into wintering locations, where they remained until spring. The mean annual linear range for all animals was 4.5 ± 0.3 km （n =35） and the maximum distance traveled by an individual horseshoe crab within one year was 9.2 km. There was no evidence that any of the horseshoe crabs tracked during this study left the estuary

关键词： Limuluspolyphemus Acoustic telemetry Horseshoe crab Tracking Estuary Home range

A Toolbox for the Analysis of Peptide Signa Biogenesis

在线全文

学校读者我要写书评

暂无评论

Molecular Plant 2017年第8期10卷 1023-1025页

作者： Nils Stuhrvvohldt Katharina Schardon Annick Stintzi Andreas schaller Institute of Plant Physiology and Biotechnology University of Hohenheim 70593 Stuttgart Germany

Peptides are emerging as a novel class of extracellular signaling molecules for ceil-to-cell communication in plants. As peptide hormones, they contribute to the control of plant growth and development, and to the interaction of plants with their biotic and abiotic environment. Many new signaling peptides have been identified in recent years and considerable progress has been made with respect to the characterization of signal perception and transduction mechanisms culminating in crystal structures for several peptide receptor complexes. However,

关键词：

Value of histomorphometric tumour thickness and smoothelin for conventional m-classification in early oesophageal adenocarcinoma

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastrointestinal Oncology 2017年第11期9卷 444-451页

作者： Katharina Endhardt Bruno Markl Andreas Probst Tina schaller Daniela Aust Institute of Pathology Klinikum Augsburg Department of Gastroenterology Klinikum Augsburg Institute of Pathology Universitatsklinikum Dresden

AIM To test the validity of tumour thickness measurement in distinguishing between the different infiltration depths, especially when the duplication of muscularis mucosae cannot be demarcated clearly. METHODS We re-evaluated 100 completely embedded Barrett's adenocarcinomas regarding m-classification, maximum tumour thickness, and muscularis mucosae duplication. For validation, smoothelin staining was performed on a subset of cases. RESULTS The m1-, m2-and m3-classified adenocarcinomasshowed a significant lower tumour thickness compared to the m4-and sm1-classified lesions(P < 0.001). Smoothelin staining determined a clear muscularis mucosae duplication in 64% of the tested samples and enabled the differentiation of the two layers in diffuse and merged splits. CONCLUSION Tumour thickness in early oesophageal adenocarcinoma significantly correlates with the depth of infiltration and demonstrates its worth as an accurate p T classification in non-polypoid lesions. We created a new algorithm, which combines histomorphology with morphometric analyses. It is noteworthy that it facilitates the assessment of mucosal vs submucosal infiltration depth. The smoothelin staining strengthened our results of the tumour thickness evaluation and can be used in cases of doubt.

关键词： Smoothelin Endoscopic submucosal dissection Muscularis mucosae Barrett's carcinoma

IN-LINE PARTICLE SIZING FOR PROCESS CONTROL IN NEW DIMENSIONS

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

China Particuology 2004年第4期2卷 185-188页

作者： Wolfgang Witt Michael Heuer Markus schaller Sympatec GmbH System-Partikel-Technik Burgstter StraBe6 D-38678 Clausthal-Zellerfeld GermanySympatec GmbH System-Partikel-Technik Burgstter StraBe6 D-38678 Clausthal-Zellerfeld GermanySympatec GmbH System-Partikel-Technik Burgstter StraBe6 D-38678 Clausthal-Zellerfeld Germany

The combination of laser diffraction with upstream sampling realized a break-through for the in- and on-line particles size analysis in industrial applications. Today, the combination of representative sampling, dry dispersion, particle size analysis by laser diffraction and integrated feedback of the sample is well accepted in many industrial applications. No more interactions of the user are required, and for standard applications the on-line monitoring of particle sizes became nearly as simple as the monitoring of any other process parameter. The increase of inspection interval from 24-hour operation to months has increased user confidence in this technology, and industries with more demanding measurement requirements are seeking to benefit from this performance. This challenge could not be solved with simple scale-ups or scale-downs. New solutions had to be found for the sampling system, the measuring sensor, the adaptation to the environmental conditions and the processing of fast growing volume of data.

关键词： in-line particle size analysis

Cation engineering on lead iodide perovskites for stable and high-performance photovoltaic applications

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2018年第4期27卷 1017-1039页

作者： Jue Gong Peijun Guo Savannah E.Benjamin P.Gregory Van Patten Richard D.schaller Tao Xu Department of Chemistry and Biochemistry Northern Illinois UniversityDeKalbIL 60115USA Center for Nanoscale Materials Argonne National Laboratory9700 South Cass AvenueLemontIL 60439USA Department of Chemistry Middle Tennessee State UniversityMurfreesboroTN 37132USA

Perovskite solar cells （PSCs） based on methylammonium lead iodide （CH3NH3PbI3） have shown unprecedentedly outstanding performance in the recent years. Nevertheless, due to the weak interaction between polar CH3NH3＋（MA＋） and inorganic PbI3 sublattices, CH3NH3PbI3 dramatically suffers from poor moisture stability, thermal decomposition and device hysteresis. As such, strong electrostatic interactions between cations and anionic frameworks are desired for synergistic improvements of the abovementioned issues. While replacements of I with Br and/or CI evidently widen optical bandgaps of perovskite materials, compositional modifications can solely be applied on cation components in order to preserve the broad absorption of solar spectrum. Herein, we review the current successful practices in achieving efficient, stable and minimally hysteretic PSCs with lead iodide perovskite systems that employ photoactive cesium lead iodide （CsPbI3）, formamidinium lead iodide （HC（NH2）2PbI3, or FAPbI3）, MA1-x y-zFAxCsyRbzPbI3 mixed-cation settings as well as two-dimensional butylammonium （C4H9NH3＋, or BA＋）/MA＋, polymeric ammonium （PEI＋）/MA＋ co-cation layered structures. Fundamental aspects behind the stabilization of perovskite phases α-CsPbi3, α-FAPbI3, mixed-cation MA1-x-y-zFAxCsyRb2PbI3 and crystallographic alignment of （BA）2（MA）3Pb4I13 for effective light absorption and charge transport will be discussed. This review will contribute to the continuous development of photovoltaic technology based on PSCs.

关键词： Solar energy conversion Perovskite solar cells Power conversion efficiency Optical bandgaps Device hysteresis Metastabte phases

An ab initio investigation of the second hydration shell of metal cations

在线全文

学校读者我要写书评

暂无评论

计算机与应用化学 2020年 1-8页

作者： Cory C.Pye Courtney R.Gilbert(née schaller) Department of Chemistry Saint Mary's UniversityHalifax

Symmetry and group theory are used to find stationary points on the potential energy surface of the metal ions Mg2+, Zn2+, Cd2+, Al3+, Sc3+, Ga3+, and In3+, with eighteen water molecules（a first and second hydration shell）. Several new local minima have been identified. However, the S6disc structure previously found remains the lowest in energy.

关键词： metal ions second hydration shell symmetry group theory ab initio