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71.
Structural complexes in the squid giant axon membrane sensitive to ionic concentrations and cardiac glycosides
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Giant nerve fibers of squid Sepioteuthis sepioidea were incubated for 10 min in artificial sea water (ASW) under control conditions, in the absence of various ions, and in the presence of cardiac glycosides. The nerve fibers were fixed in OsO4 and embedded in Epon, and structural complexes along the axolemma were studied. 相似文献
72.
Gert Kwakkel Carel GM Meskers Erwin E van Wegen Guus J Lankhorst Alexander CH Geurts Annet A van Kuijk Eline Lindeman Anne Visser-Meily Erwin de Vlugt J Hans Arendzen 《BMC neurology》2008,8(1):49
Background
Main claims of the literature are that functional recovery of the paretic upper limb is mainly defined within the first month post stroke and that rehabilitation services should preferably be applied intensively and in a task-oriented way within this particular time window. EXplaining PLastICITy after stroke (acronym EXPLICIT-stroke) aims to explore the underlying mechanisms of post stroke upper limb recovery. Two randomized single blinded trials form the core of the programme, investigating the effects of early modified Constraint-Induced Movement Therapy (modified CIMT) and EMG-triggered Neuro-Muscular Stimulation (EMG-NMS) in patients with respectively a favourable or poor probability for recovery of dexterity. 相似文献73.
Arvind K Awasthi GM Nagaraja GV Naik Sriramana Kanginakudru K Thangavelu Javaregowda Nagaraju 《BMC genetics》2004,5(1):1
Background
The genus Morus, known as mulberry, is a dioecious and cross-pollinating plant that is the sole food for the domesticated silkworm, Bombyx mori. Traditional methods using morphological traits for classification are largely unsuccessful in establishing the diversity and relationships among different mulberry species because of environmental influence on traits of interest. As a more robust alternative, PCR based marker assays including RAPD and ISSR were employed to study the genetic diversity and interrelationships among twelve domesticated and three wild mulberry species. 相似文献74.
Harriëtte Riese Tanja GM Vrijkotte Piet Meijer Cees Kluft Eco JC de Geus 《BMC cardiovascular disorders》2002,2(1):9-12
Background
Serum C-reactive protein (CRP) has been identified in prospective epidemiological research as an independent risk marker for cardiovascular disease. In this paper, short-term biological variation of CRP is documented and a strategy to test the reliability of a single CRP sample is proposed. 相似文献75.
Foliar elemental composition of European forest tree species associated with evolutionary traits and present environmental and competitive conditions
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76.
77.
Fish populations in Albasini and Nandoni dams are negatively affected by extensive netting practices. This observation was made by the authors following a number of fish health assessment surveys related to aquatic pollution in the Luvuvhu River catchment. A comparison between the number and size of fish collected over a period of ten years indicated decreases in the average size and a consistent low number of fish, despite similar extensive sampling efforts. Unregulated netting is a common practice in both dams. This may become a serious problem as fish from these two dams are an important source of protein for the local communities. The purpose of this note is to report that gillnets are illegally used in the system and on the effect this could have on the fish population. The authors suggest educational and awareness initiatives to inform local communities about the importance of utilising fish in a sustainable manner to ensure the livelihood of generations to come. 相似文献
78.
Esther Reefman Marcelus CJM de Jong Hilde Kuiper Marcel F Jonkman Pieter C Limburg Cees GM Kallenberg Marc Bijl 《Arthritis research & therapy》2007,8(6):R156
Apoptotic cells are thought to play an essential role in the pathogenesis of systemic lupus erythematosus (SLE). We hypothesise
that delayed or altered clearance of apoptotic cells after UV irradiation will lead to inflammation in the skin of SLE patients.
Fifteen SLE patients and 13 controls were irradiated with two minimal erythemal doses (MEDs) of ultraviolet B light (UVB).
Subsequently, skin biopsies were analysed (immuno)histologically, over 10 days, for numbers of apoptotic cells, T cells, macrophages,
and deposition of immunoglobulin and complement. Additionally, to compare results with cutaneous lesions of SLE patients,
20 biopsies of lupus erythematosus (LE) skin lesions were analysed morphologically for apoptotic cells and infiltrate. Clearance
rate of apoptotic cells after irradiation did not differ between patients and controls. Influx of macrophages in dermal and
epidermal layers was significantly increased in patients compared with controls. Five out of 15 patients developed a dermal
infiltrate that was associated with increased epidermal influx of T cells and macrophages but not with numbers of apoptotic
cells or epidermal deposition of immunoglobulins. Macrophages were ingesting multiple apoptotic bodies. Inflammatory lesions
in these patients were localised near accumulations of apoptotic keratinocytes similar as was seen in the majority of LE skin
lesions. In vivo clearance rate of apoptotic cells is comparable between SLE patients and controls. However, the presence of inflammatory
lesions in the vicinity of apoptotic cells, as observed both in UVB-induced and in LE skin lesions in SLE patients, suggests
that these lesions result from an inflammatory clearance of apoptotic cells. 相似文献
79.
Background
Experimental populations of Escherichia coli have evolved for 20,000 generations in a uniform environment. Their rate of improvement, as measured in competitions with the ancestor in that environment, has declined substantially over this period. This deceleration has been interpreted as the bacteria approaching a peak or plateau in a fitness landscape. Alternatively, this deceleration might be caused by non-transitive competitive interactions, in particular such that the measured advantage of later genotypes relative to earlier ones would be greater if they competed directly. 相似文献80.
Giulio Galla Gianni Barcaccia Angelo Ramina Silvio Collani Fiammetta Alagna Luciana Baldoni Nicolò GM Cultrera Federico Martinelli Luca Sebastiani Pietro Tonutti 《BMC plant biology》2009,9(1):128-17