5,387 research outputs found
Nucleophilicity/Electrophilicity Excess in Analyzing Molecular Electronics
Intramolecular electron transfer capability of all metal aromatic and
anti-aromatic aluminum cluster compounds is studied in terms of density
functional theory based global and local reactivity descriptors. This study
will provide important inputs towards the fabrication of the material required
for molecular electronics.Comment: 21 pages, 6 figures, 13 table
Molecular dynamics studies on phenol– water clusters
Architectures of the molecules and their behavior in the clustered system are important for various consequence functions in the realistic environment. In order to gain detailed knowledge of the phenol-water clusters, 1-nano second (ns) the molecular dynamic (MD) simulation has been performed. The various structural parameters have been obtained from the MD trajectories. MD simulation reveals the presence of well-defined hydrogen-bonded network of water molecules around the phenol molecule and their dynamics. The existence of cooperativity in the hydrogen bonding and high dynamics nature of hydrogen-bonded network are evident from the present study. The calculated mutual diffusion coefficient is in close agreement with the experimental value of the phenol-water system
Kick-starting economic growth: An interview with Dr K. V. Subramanian, India's Chief Economic Advisor
Role of Elasticity on Forces and Deflections of a Submerged Elastic Plate in Waves
Source: ICHE Conference Archive - https://mdi-de.baw.de/icheArchiv
Discosiella Sydow and Discosiellina gen. nov.
Discosiella cylindrospora H. and P. Sydow, the type species of the genus Discosiella H. and P. Sydow, is redescribed from a study of type material. It is concluded that the conidial appendages of this fungus are mucoid in nature, a fact not mentioned by the Sydows in their diagnosis and description. The diagnosis of Discosiella is suitably emended. From the original description of D. longiciliata Agnihothrudu, supplemented by a study of the type material of this species, it is concluded that it cannot be retained in the genus Discosiella as emended in this paper and is now accommodated in a new genus Discosiellina as D. longiciliata (Agnihothrudu) comb. nov
Can Cluster Evaporation Explain the Missing Thermal Energy in Galaxy Clusters?
Resent observations of a number of galaxy clusters using the
Sunyaev-Zel'dovich effect indicate that about 1/3 of baryonic mass is missing
from the hot intracluster medium (ICM), which is significantly larger than the
fraction of stars and cool gas, which account for only about 10%. Here we
address the question whether the remaining can be accounted for by
thermal evaporation of gas from clusters. We have found that evaporation can
occur only from the cluster ``surface'', , and not from it's
interior. We evaluated particle diffusion through the magnetized ICM for
several scenarios of ISM turbulence and found that diffusivity is suppressed by
at least a factor of 100 or more, compared to the Spitzer value. Thus, only
particles from radii r\ga0.9r_{\rm vir} can evaporate. Diffusion of particles
from inside the cluster, r\la0.9r_{\rm vir}, takes longer than the Hubble
time. This lowers the cluster-averaged fraction of the evaporated hot gas to
few percent or less. However, if the missing hot component {\it is indeed} due
to evaporation, this strongly constrains the magnetic field structure in the
cluster envelope, namely either (i) the gas is completely unmagnetized
( gauss) in the cluster halo or (ii) the magnetic fields in the
ICM are rather homogeneous and non-turbulent.Comment: ApJL, accepted version; 4 pages, 2 figure
Durability properties of fly ash and silica fume blended concrete for marine environment
1803-1812The improvement in durability and strength by replacing the conventional components with supplementary materials in concrete is one of the recently focused areas in concrete technology. From the previous till the recent times serious efforts have been taken to improve the structural adequacy and durability characteristics of concrete so as to efficiently replace the usual conventional concrete. In this present research work, the mechanical and durability properties of the concrete blended with fly ash (FC) and silica fume (SC) are studied in detail. The partial replacement of cement with silica fume and fly ash in the concrete improves the overall property of the concrete, gives a way for the reuse of the supplementary material to be efficiently brought back giving a cleaner environment. The fly ash is used with the replacement percentages of 10, 15 and 20 of the cement whereas for silica fume the replacement percentages are 8, 10 and 12, respectively. Also the study is extended to combination mixes to test the strength and durability and it has been found that the increase in the percentage of the silica fume increases the strength reduces the workability and permeability to a high extent and the inclusion of the fly ash paves a way for the increase in the durability property. The effect of the cementitious material with FC and SC on the concrete is compared with the nominal concrete and also the suitability in the usage of marine environment is validated in accordance with the International codes
Tensor fascia lata muscle pedicle grafting for avascular necrosis femoral head
Background: Osteonecrosis of femoral head (AVN) is a disabling condition with ill-defined etiology and pathogenesis. In more than 60% it leads to osteoarthritis of hip joint. Treatment for this condition includes both operative and non-operative methods with variable success rates. Surgical options being aimed at both conservation of femoral head and arthroplasty of hip joint. Aim of our study was to evaluate the efficacy of tensor fascia lata muscle pedicle grafting in the management of osteonecrosis of femoral head.Methods: 27 cases with a mean age of 38.7 years (range from 24 to 52) who underwent tensor fascia lata muscle pedicle grafting in the management of osteonecrosis of femoral head were prospectively evaluated with a mean follow up period of 7.3 years (range from 3 to 12 years). Watson-Jones approach was used in all patients. Average hospital stay was 12 days. Harris hip score was used for the evaluation of clinical outcome.Results: In our series of 27 cases, the Harris hip score was excellent (90-100) in 19, good (80-89) in 5, fair (70-79) in 2 and poor (<70) in 1 case at final follow up.Conclusions: Tensor fascia lata muscle pedicle grafting is an effective, technically easier, pain relieving head-preserving procedure and will improve outcome in properly selected patients with osteonecrosis of femoral head.
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