... forest environment, and thus also the degree of damage to trees, have not been sufficiently explained so far (N, H 2003) The extent of damage is probably influenced mostly by (1) abundance ... the damage that small mammals cause to woody plants, only minimal attention is paid to research of their ecology in the forest environment Methods for the estimation of a risk of rodent damage ... Generally, protection of stands against rodent-caused damage is underestimated and many foresters anxiously await the end of winter when the extent of damage to plantations becomes apparent, being unable...
Ngày tải lên: 07/08/2014, 10:21
... The great deal of knowledge accumulated in the past three decades on the mechanisms underlying damage inflicted to the brain tissue by cerebral ischemia has failed to translate into effective medicines ... years, numerous studies have addressed the role of the endocannabinoid system in stroke and in the mechanisms of post-ischemic neuronal death (Table 1) To this end, models of focal and global ischemia ... 2-AG may attenuate OGD injury in cortical cells, although via CB1-independent and CB2-independent mechanisms [36], and that the CB receptor agonist WIN 55212-2, at low (3–30 nm) concentrations,...
Ngày tải lên: 07/03/2014, 03:20
Báo cáo khoa học: " The cross-reactivity of the enterovirus 71 to human brain tissue and identification of the cross-reactivity related fragments" ppsx
... cross-reactivity with human brain tissues There were 10 peptides showed weak cross-reactivity with human brain tissues and there were peptides showed no cross-reactivity with human brain tissues Sera of patients ... and IgM was free with ELISA analysis The human tissues of cerebra was not stained obviously with negative control sera (Fig 1B-F), while the human tissues of cerebra was stained on the neuron glial ... in these tissues Jia et al Virology Journal 2010, 7:47 http://www.virologyj.com/content/7/1/47 Page of 10 Figure Cross reaction of the IgG from EV71 infected patients’ sera with human tissues...
Ngày tải lên: 12/08/2014, 04:21
Non neuronal mechanisms of brain damage and repair after stroke
... (e.g., via reducing parenchymal damage) ? Endothelial-specific genetic manipulations should address this question and also whether BBB damage may contribute to parenchymal damage It should be noted that ... compartments should be required It is in this context that this monograph Nonneuronal Mechanisms of Brain Damage and Repair After Stroke represents a significant addition to the literature and ... Jiping Tang, and John H Zhang The Role of Nonneuronal Nrf2 Pathway in Ischemic Stroke: Damage Control and Potential Tissue Repair 377 Tuo Yang, Yang Sun, and Feng Zhang Stem Cell Therapy for...
Ngày tải lên: 14/05/2018, 12:38
Báo cáo khoa học: Increased glucose metabolism and ATP level in brain tissue of Huntington’s disease transgenic mice pdf
... in the literature, our results suggest that the neuronal damage in HD tissue may be associated with increased energy metabolism at the tissue level leading to modified levels of various intermediary ... Finally, one more issue that needs to be discussed is the relation of the damaged neurones and the enhanced ATP concentration at the tissue level demonstrated in the present study The higher ATP concentration ... in the energy impairment suggested for HD [7] is not understood in detail Data from post mortem tissues (caudate and putamen of the striatum) of HD patients [8,9] suggest decreased activities...
Ngày tải lên: 23/03/2014, 10:20
Mechanisms of Slow Sorption of Organic Chemicals to Natural Particles docx
... exhaustive extraction that results from degradation of the parent molecule It is safe to say that the mechanisms governing sorption rates are not fully established Thus, this paper is partly speculative ... depend greatly on the heterogeneity of the flow field and the type of particles that make it up Mechanisms Possible Rate-Limiting Steps The potential causes of slow sorption are activation energy ... size fraction Concluding Remarks Regarding Mechanism It is quite likely that both OMD and SRPD mechanisms operate in the environment, often probably together in the same particle OMD may predominate...
Ngày tải lên: 28/03/2014, 20:20
Báo cáo khoa học: Mechanisms of obesity and related pathologies: Transcriptional control of adipose tissue development pdf
... Adipose tissue is the most abundant tissue in humans, representing approximately 10–29% of body weight It is found in a multitude of locations and consists of two major forms: white adipose tissue ... more adipocytes for hypertrophic expansion This review discusses the mechanisms controlling the formation and function of adipose tissue and how these processes might be altered by various therapeutic ... adipose tissue development C Vernochet et al cytokines and hormones An excess of food intake can increase fat mass and disrupt energy balance Recent studies suggest that enlarged adipose tissue...
Ngày tải lên: 29/03/2014, 22:21
Báo cáo khoa học: Mechanisms of obesity and related pathologies: The macro- and microcirculation of adipose tissue pdf
... adipose tissue later in this minireview Adipose tissue angiogenesis Studies that describe the quality of adipose tissue consistently point to the microvasculature and angiogenesis within adipose tissue ... existing adipose tissue may result in increased levels of inflammation Adipose tissue and tumor growth Although adipose tissue vascularization functions in a delicate balance in tissue homeostasis, ... differences among adipose tissue depots with respect to the overall rate of adipocyte dysfunction, local degree of inflammation and tissue vascularization [2] Adipose tissue is a heterogeneous...
Ngày tải lên: 29/03/2014, 22:21
Super Brain - Unleashing the Explosive Power of Your Mind to Maximize Health, Happiness, and Spiritual Well-being
... feedback Any ordinary person hooked up to a biofeedback machine can quickly learn to control bodily mechanisms that usually run on automatic You can lower your blood pressure, for example, or change ... compensate for the loss and try to reestablish missing connections, which e ectively rebuilds the damaged neural network The neighboring neurons step up their game and undergo “compensatory regeneration” ... Cruikshank cut only one branch and found that the gap he created was soon lled in with new nerve tissue When he submitted his paper to the Royal Society, however, it met with skepticism and wasn’t...
Ngày tải lên: 01/06/2014, 21:23
Báo cáo hóa học: " Research Article Neural Mechanisms of Motion Detection, Integration, and Segregation: From Biology to Artificial Image Processing Systems" docx
... spatiotemporal filtering mechanisms in order to deal with spatial and temporal scales (compare [37]) The initial motion estimation mechanism is detailed in the following The mechanisms for further ... Advances in Signal Processing (iii) Reentrant mechanisms for modulatory signal enhancement together with subsequent feature competition using center-surround mechanisms for activity normalization implement ... object motion In many cases, such mechanisms tend to smooth the velocity field in an undesired fashion, since the smoothness constraints are controlled by localized mechanisms only In our proposal,...
Ngày tải lên: 21/06/2014, 09:20
Báo cáo lâm nghiệp: "Rodent-caused damage to forest trees from the viewpoint of forestry practice" potx
... endangered tree species, age of the most damaged trees, prevalent type of damage and characteristics of vegetation of severely damaged plots (3) Control of damage caused by small mammals Information ... section we asked for information on the extent of damage in the locality, if the damage caused by small mammals is below, near, or above the damage caused by wind, snow, insects and large herbivores, ... significant damage all over the Czech Republic and almost every forest district reported the occurrence of severe as well as mild damage over the years For 35% of the addressed foresters, damage caused...
Ngày tải lên: 07/08/2014, 03:22
Báo cáo lâm nghiệp:"Effects of field vegetation control on pine weevil (Hylobius abietis) damage to newly planted Norway spruce seedlings" ppt
... 1998, June 6, 1999 and October 12, 1999 Pine weevil damage was recorded using a 6-level scale where = undamaged, = slightly damaged, , = severely damaged and = dead Feeding by pine weevils was also ... weevil damage colonisation following scarification is an important factor to consider when attempting to reduce pine weevil damage The vegetation cover had only limited effects on weevil damage ... vegetation [6] Scarification reduces damage to seedlings by pine weevils significantly compared to planting in undisturbed humus [5, 11, 13] This reduction in damage is usually most evident in the...
Ngày tải lên: 08/08/2014, 01:21
DESIGN OF MACHINERYAN INTRODUCTION TO THE SYNTHESIS AND ANALYSIS OF MECHANISMS AND MACHINES phần 2 potx
... PLANARMECHANISMSVERSUSSPATIALMECHANISMS The above discussion of controlled movement has assumed that the motions desired are planar (2-D) We live in a three-dimensional world, however, and our mechanisms ... in that world Spatial mechanisms are 3-D devices Their design and analysis is much more complex than that of planar mechanisms, which are 2-D devices The study of spatial mechanisms is beyond ... references for further study are in the bibliography to this chapter However, the study of planar mechanisms is not as practically limiting as it might first appear since many devices in three dimensions...
Ngày tải lên: 08/08/2014, 12:23
DESIGN OF MACHINERYAN INTRODUCTION TO THE SYNTHESIS AND ANALYSIS OF MECHANISMS AND MACHINES phần 3 pot
... solution with a direct, noniterative approach * In some situations, particularly with multiloop mechanisms, a closed-form solution may not be attainable Then an alternative approach is needed, ... and S V.Sreenivasan (1996) "A Study of the Solvabilityof the Position Problem for Multi-CircuitMechanismsby Wayof Example of the Double Butterfly Linkage." Journal of Mechanical Design, 118(3),...
Ngày tải lên: 08/08/2014, 13:20
DESIGN OF MACHINERYAN INTRODUCTION TO THE SYNTHESIS AND ANALYSIS OF MECHANISMS AND MACHINES phần 4 pptx
Ngày tải lên: 08/08/2014, 13:20
DESIGN OF MACHINERYAN INTRODUCTION TO THE SYNTHESIS AND ANALYSIS OF MECHANISMS AND MACHINES phần 5 pps
... need for mechanisms to provide constant velocity motion, matched exactly to the conveyor, in order to carry the tools alongside for a long enough time to their job These cam driven "chaser" mechanisms...
Ngày tải lên: 08/08/2014, 13:20
DESIGN OF MACHINERYAN INTRODUCTION TO THE SYNTHESIS AND ANALYSIS OF MECHANISMS AND MACHINES phần 6 potx
... reverse Rather, the desired ratio gears are selectively locked to the output shaft by synchromesh mechanisms as in Figure 9-43 which shows a four-speed, manually shifted, synchromesh automotive ... epicyclic gear train Perhaps the most common application of differentials is in the final drive mechanisms of wheeled land vehicles When a four-wheeled vehicle turns, the wheels on the outside...
Ngày tải lên: 08/08/2014, 13:20
DESIGN OF MACHINERYAN INTRODUCTION TO THE SYNTHESIS AND ANALYSIS OF MECHANISMS AND MACHINES phần 7 potx
... matrix form, their solution (with a computer) is a trivial task The real work in designing these mechanisms comes in the determination of the shapes and sizes of the members In addition to the ... should be in the vicinity of the natural frequency of the pile-earth system Pll-ll Paint can shaker mechanisms are common in paint and hardware stores While they a good job of mixing the paint, they ... determining and designing a state of static and dynamic balance in rotating elements and also in mechanisms having complex motion, such as the fourbar linkage The methods and equipment used to...
Ngày tải lên: 08/08/2014, 13:20
DESIGN OF MACHINERYAN INTRODUCTION TO THE SYNTHESIS AND ANALYSIS OF MECHANISMS AND MACHINES phần 8 ppsx
... matrix form, their solution (with a computer) is a trivial task The real work in designing these mechanisms comes in the determination of the shapes and sizes of the members In addition to the ... should be in the vicinity of the natural frequency of the pile-earth system Pll-ll Paint can shaker mechanisms are common in paint and hardware stores While they a good job of mixing the paint, they ... determining and designing a state of static and dynamic balance in rotating elements and also in mechanisms having complex motion, such as the fourbar linkage The methods and equipment used to...
Ngày tải lên: 08/08/2014, 13:20
DESIGN OF MACHINERYAN INTRODUCTION TO THE SYNTHESIS AND ANALYSIS OF MECHANISMS AND MACHINES phần 9 docx
Ngày tải lên: 08/08/2014, 13:20