874 research outputs found
Comparative Study of Impact of Azotobacter and Trichoderma with Other Fertilizers on Maize Growth
Biofertilizers may be a better eco-friendly option to maintain soil fertility. The study was conducted to investigate the effect of Azotobacter and Trichoderma on the vegetative growth of maize (Zea mays L.) plants. The experiment was carried out in medium sized pots, at IAAS, Lamjung (Feb 2017 - May 2017) in completely randomized design (CRD), consisting eight treatments and three replications. Treatments were namely T1 (control), T2 (Azotobacter), T3 (Trichoderma), T4 (Azotobacter + Trichoderma), T5 (NPK), T6 (Azotobacter + Trichoderma + FYM), T7 (Azotobacter + Trichoderma + FYM + NPK), T8 (FYM). Azotobacter showed a positive increase in plant height, stem girth, dry shoot weight, root length and width, and root weight while Trichoderma displayed either negative or minimal impact. Effect of FYM was lower than Azotobacter but considerably higher than Trichoderma. Trichoderma seriously inhibited the expression of Azotobacter when used together. Trichoderma even suppressed the outcome (except shoot weight) of FYM when used together. Root length was the longest in Azotobacter inoculation. The highest number of leaves was in T7 followed by Azotobacter (T2) and NPK (T5). Unlike leaf width, Azotobacter showed a negligible increase in leaves length while Trichoderma wherever present showed the negative impact. Minimum chlorophyll content was found in Azotobacter or Trichoderma after 73 days. Azotobacter treatment showed early tasseling than Trichoderma. The association of Azotobacter and Trichoderma increased the biomass. Azotobacter has significant effects on growth parameters of maize and can supplement chemical fertilizer, while Trichoderma was found to inhibit most of the growth parameters
Optical Upconversion Properties Of Tm2O3 / Yb2O3 Doped Lead Tellurite Glasses
The melt-quench process was used to create the lead-tellurite glasses codoped with lanthanides as thulium and ytterbium. Thermal characterization carried by differential scanning calorimetry. X-ray diffraction is studies to get the nature of sold sample. The UV-Visible-IR absorption spectra was carried in range of 300 nm to 1100 nm. There were four unique absorption peaks on the glass thulium –ytterbium doped glass. The frequency up-conversion (UC) fluorescence has been seen at room temperature by 975 nm excitation
Aperiodic tumbling of microrods advected in a microchannel flow
We report on an experimental investigation of the tumbling of microrods in
the shear flow of a microchannel (40 x 2.5 x 0.4 mm). The rods are 20 to 30
microns long and their diameters are of the order of 1 micron. Images of the
centre-of-mass motion and the orientational dynamics of the rods are recorded
using a microscope equipped with a CCD camera. A motorised microscope stage is
used to track individual rods as they move along the channel. Automated image
analysis determines the position and orientation of a tracked rods in each
video frame. We find different behaviours, depending on the particle shape, its
initial position, and orientation. First, we observe periodic as well as
aperiodic tumbling. Second, the data show that different tumbling trajectories
exhibit different sensitivities to external perturbations. These observations
can be explained by slight asymmetries of the rods. Third we observe that after
some time, initially periodic trajectories lose their phase. We attribute this
to drift of the centre of mass of the rod from one to another stream line of
the channel flow.Comment: 14 pages, 8 figures, as accepted for publicatio
The layer disorders defect in coir fiber under thermal and chemical treatment
Natural coir fibers, subjectd to thermal treatments in the range of 0oC
to 200oC and alkali treatment with 5% to 30% concentration w/w, have been used in
the present investigation to determine the interlayer variability of the cellulose
planes (020), (110) and (110). Among the equatorial reflections (110), (110) and
(020), the extent of variability is found to be more with the proportion of such
affected planes less for (020) reflection in the native cellulose at lower
temperature while at higher temperature (110) and (110) become more affected by
variability defect. (110) and (1 10) planes are more affected also with alkali
treatment.The layer disorders defect in coir fiber under thermal and chemical treatment
D N Mahato*, B K Mathur and S Bhattacharjee
Department of Physics, Indian Institute of Technology,
Kharagpur-721 302, West Bengal, India
E-mail : [email protected] of Physics, Indian Institute of Technology,
Kharagpur-721 302, West Bengal, Indi
Surface Defects from Fractional Branes -- II
A generic half-BPS surface defect of supersymmetric U
Yang-Mills theory is described by a partition of and a
set of continuous parameters. We show that such a defect can be realized
by stacks of fractional D3-branes in Type II B string theory on a
orbifold background in which the brane world-volume is partially
extended along the orbifold directions. In this set up we show that the
continuous parameters correspond to constant background values of certain
twisted closed string scalars of the orbifold. These results extend and
generalize what we have presented for the simple defects in a previous paper.Comment: 37 page
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