WITHDRAWN: Wildlife use of Riparian Vegetation Buffer Zones in High Voltage Powerline Rights-of-Way in Quebec Deciduous Forest

2008 ◽  
pp. 439-447
Author(s):  
A. Bérubé ◽  
M. Larose ◽  
M. Belles-lsles ◽  
G.J. Doucet
Keyword(s):  
High Voltage ◽  
Riparian Vegetation ◽  
Deciduous Forest ◽  
Buffer Zones ◽  
Wildlife Use

scholarly journals Development of lake conservation

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Renny Varghese
Keyword(s):  
Riparian Vegetation ◽  
Public Involvement ◽  
Metropolitan Region ◽  
Garden City ◽  
Buffer Zones ◽  
The Public ◽  
Pollution Levels ◽  
High Pollution ◽  
The City ◽  
Minor Irrigation

The city of Bengaluru, once known as the Garden City of India and the City of Lakes, has now transformed into the Silicon Valley of India. This transformation has happened over the last few decades and has caused major changes to the City’s landscape. One if the important issues the city faces today is the scarcity of water. Researchers owe this issue to the depletion of lakes due to high pollution levels, encroachment and dumping of solid waste in the lakes. The neighborhood Bannerghutta is located in the Southern part of Bangalore Metropolitan Region, which is in developing stages and handful of lakes are found and comes under Minor Irrigation Department. The project focusses on Safeguarding the lake and transforming buffers into public recreational areas with functional strips of riparian vegetation. Safeguarding of lake ensures the habited of that area is preserved and protected. The transformation of lake buffer zones into public recreational spaces ensures the area to be free of any buildings that might otherwise be built on this land. Also, bringing in the public into the space would allow increased public involvement in the lakes campaign and would ensure better maintenance of the functional parts of the lake. A recreational space is perceived as a destination and would add value to the place. Keywords: Safeguarding the lake, developing stages and handful of lakes

Elimination effects of riparian vegetation buffer zones on surface water nitrogen and phosphorus in Shenyang suburbs

2011 ◽  
Vol 19 (2) ◽  
pp. 403-408 ◽  
Author(s):  
Li-Feng YAN ◽  
Xian-Feng SHI ◽  
Li-Zhong YU ◽  
Yong-Gang MIAO ◽  
Li-Ping YAO ◽  
...  
Keyword(s):  
Surface Water ◽  
Riparian Vegetation ◽  
Nitrogen And Phosphorus ◽  
Buffer Zones

scholarly journals Streambank erodibility and lateral instability hazard in the Manahara River, Kathmandu basin, Nepal

2007 ◽  
Vol 35 ◽  
pp. 55-66
Author(s):  
Pramila Shrestha ◽  
Naresh Kazi Tamrakar
Keyword(s):  
Riparian Vegetation ◽  
Anthropogenic Activities ◽  
Hazard Index ◽  
Anthropogenic Disturbances ◽  
Stress Index ◽  
Lateral Instability ◽  
Buffer Zones ◽  
Order Stream ◽  
High Hazard ◽  
Fifth Order

The Manahara River, a large tributary of the Bagmati River, is located in the northeast of the Kathmandu basin. Recently, the river (especially, its lower reach) has been excessively mined for sand and gravel. Such anthropogenic activities together with the natural processes have led to rapid and haphazard shifting of its channel. As a result, its banks and adjacent areas are subject to failures and other mass movements. In this paper, the river course is evaluated in terms of its bank erosion and lateral instability (BELI) hazard by considering bank erodibility hazard index, near-bank stress index, lateral instability hazard index, and anthropogenic disturbances. The downstream reaches of the fourth-order stream belong to a moderate BELI hazard, whereas the fifth-order stream in the middle reach, near Mulpani, falls under a very high hazard. The rest of its fifth-order stretch exhibits a high hazard. An increase in the degree of anthropogenic disturbances increases the BELI hazard in the downstream stretch of the river. Poor riparian vegetation seems to be one of the factors aggravating the bank erodibility hazard in the river. Hence, the restoration of bank vegetation and establishment of riparian vegetation buffer zones can significantly reduce the BELI hazard.

scholarly journals Caloric content of leaves of five tree species from the riparian vegetation in a forest fragment from South Brazil

2015 ◽  
Vol 27 (3) ◽  
pp. 247-253
Author(s):  
Leandro Fabrício Fiori ◽  
Vivian de Mello Cionek ◽  
Patricia Almeida Sacramento ◽  
Evanilde Benedito
Keyword(s):  
Tree Species ◽  
Riparian Vegetation ◽  
Deciduous Forest ◽  
Energy Content ◽  
Caloric Content ◽  
Trophic Chain ◽  
Forest Fragment ◽  
Riparian Tree ◽  
Leaf Species ◽  
South Brazil

Abstract Aim: The measurement of the caloric content evidences the amount of energy that remains in the leaf and that can be released to the aquatic trophic chain. We assessed the energy content of leaves from five riparian tree species of a forest fragment in south Brazil and analyzed whether leaf caloric content varied between leaf species and between seasons (dry and wet). The studied sites are located in Northwest of Paraná State, inside a Semi-Deciduous Forest fragment beside two headwater streams. Methods Sampling sites were located along the riparian vegetation of these two water bodies, and due to its proximity and absence of statistical differences of caloric values, analyzed as one compartment. Results Caloric content varied significantly among species and among all pairs of species, with exception of Nectandra cuspidata Ness and Calophyllum brasiliensis Cambess. Two species presented significant differences between seasons, Sloanea guianensis (Aubl.) Ben and Calophyllum brasiliensis Cambess. Conclusions The absence of significant seasonal differences of energy content for some species may be due to the characteristics of the tropical forest, in which temperature did not varied dramatically between seasons. However, the energy differed between species and seasons for some species, emphasizing the necessity of a preliminary inspection of energy content, before tracing energy fluxes instead of using a single value to all species from riparian vegetation.

High Voltage Electron Microscopy of Ion-Milled Dental Enamel

1974 ◽  
Vol 32 ◽  
pp. 60-61
Author(s):  
L. D. Ackerman ◽  
S. H. Y. Wei
Keyword(s):  
Electron Microscopy ◽  
High Voltage ◽  
Third Molar ◽  
Polarized Light ◽  
Dental Enamel ◽  
Longitudinal Section ◽  
Ion Milling ◽  
High Voltage Electron Microscopy ◽  
Voltage Electron ◽  
High Voltage Electron

Mature human dental enamel has presented investigators with several difficulties in ultramicrotomy of specimens for electron microscopy due to its high degree of mineralization. This study explores the possibility of combining ion-milling and high voltage electron microscopy as a means of circumventing the problems of ultramicrotomy.A longitudinal section of an extracted human third molar was ground to a thickness of about 30 um and polarized light micrographs were taken. The specimen was attached to a single hole grid and thinned by argon-ion bombardment at 15° incidence while rotating at 15 rpm. The beam current in each of two guns was 50 μA with an accelerating voltage of 4 kV. A 20 nm carbon coating was evaporated onto the specimen to prevent an electron charge from building up during electron microscopy.

Three-Dimensional Visualization of the T-System of Frog Muscle Using High Voltage Electron Microscopy and a Lanthanum Stain

1977 ◽  
Vol 35 ◽  
pp. 570-571 ◽  
Author(s):  
Lee D. Peachey ◽  
Clara Franzini-Armstrong
Keyword(s):  
Electron Microscopy ◽  
High Voltage ◽  
Three Dimensional ◽  
Biological Tissues ◽  
High Voltage Electron Microscopy ◽  
Transverse Tubular System ◽  
Peroxidase Reaction ◽  
Voltage Electron ◽  
High Voltage Electron ◽  
T System

The effective study of biological tissues in thick slices of embedded material by high voltage electron microscopy (HVEM) requires highly selective staining of those structures to be visualized so that they are not hidden or obscured by other structures in the image. A tilt pair of micrographs with subsequent stereoscopic viewing can be an important aid in three-dimensional visualization of these images, once an appropriate stain has been found. The peroxidase reaction has been used for this purpose in visualizing the T-system (transverse tubular system) of frog skeletal muscle by HVEM (1). We have found infiltration with lanthanum hydroxide to be particularly useful for three-dimensional visualization of certain aspects of the structure of the T- system in skeletal muscles of the frog. Specifically, lanthanum more completely fills the lumen of the tubules and is denser than the peroxidase reaction product.

Resolution, Contrast and Interpretation of HVEM Images of Crystals

1973 ◽  
Vol 31 ◽  
pp. 228-229
Author(s):  
L. E. Thomas ◽  
J. S. Lally ◽  
R. M. Fisher
Keyword(s):  
High Voltage ◽  
Chromatic Aberration ◽  
Crystalline Materials ◽  
Resolution Parameter ◽  
Instrument Resolution ◽  
Imaging Conditions ◽  
Beam Excitation ◽  
Optimum Imaging

In addition to improved penetration at high voltage, the characteristics of HVEM images of crystalline materials are changed markedly as a result of many-beam excitation effects. This leads to changes in optimum imaging conditions for dislocations, planar faults, precipitates and other features.Resolution - Because of longer focal lengths and correspondingly larger aberrations, the usual instrument resolution parameter, CS174 λ 374 changes by only a factor of 2 from 100 kV to 1 MV. Since 90% of this change occurs below 500 kV any improvement in “classical” resolution in the MVEM is insignificant. However, as is widely recognized, an improvement in resolution for “thick” specimens (i.e. more than 1000 Å) due to reduced chromatic aberration is very large.

Radiation-Induced Precipitation at Thin Foil Surfaces in Ni-Be Alloys

1982 ◽  
Vol 40 ◽  
pp. 598-599
Author(s):  
T. Mukai ◽  
T. E. Mitchell
Keyword(s):  
Electron Microscopy ◽  
High Voltage ◽  
Electron Irradiation ◽  
High Vacuum ◽  
Thin Foil ◽  
Homogeneous Precipitation ◽  
High Voltage Electron Microscopy ◽  
Voltage Electron ◽  
High Voltage Electron ◽  
Radiation Induced

Radiation-induced homogeneous precipitation in Ni-Be alloys was recently observed by high voltage electron microscopy. A coupling of interstitial flux with solute Be atoms is responsible for the precipitation. The present investigation further shows that precipitation is also induced at thin foil surfaces by electron irradiation under a high vacuum.

The Reduction of Chromatic Aberrations Due to Instrumental Instabilities

1971 ◽  
Vol 29 ◽  
pp. 14-15
Author(s):  
J. S. Lally ◽  
R. Evans
Keyword(s):  
Electron Microscope ◽  
High Voltage ◽  
Focal Length ◽  
Chromatic Aberration ◽  
Objective Lens ◽  
Usual Practice ◽  
Voltage Electron ◽  
Short Focal Length ◽  
Chromatic Aberrations ◽  
Electron Microscopes

One of the instrumental factors often limiting the resolution of the electron microscope is image defocussing due to changes in accelerating voltage or objective lens current. This factor is particularly important in high voltage electron microscopes both because of the higher voltages and lens currents required but also because of the inherently longer focal lengths, i.e. 6 mm in contrast to 1.5-2.2 mm for modern short focal length objectives.The usual practice in commercial electron microscopes is to design separately stabilized accelerating voltage and lens supplies. In this case chromatic aberration in the image is caused by the random and independent fluctuations of both the high voltage and objective lens current.

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