Biochemical Characterization of High Mercury Tolerance in a Pseudomonas Spp. Isolated from Industrial Effluent

A mercury resistant Pseudomonas spp. was isolated from industrial effluent that was able to tolerate 200 µM HgCl2. The Hg2+-resistant Pseudomonas spp. exhibited elevated stress-regulatory mechanisms as indicated by its high and inducible mercury reductase activity, high intrinsic catalase activity and enhanced resistance to Hg2+-induced release of protein-bound iron. An enhanced resistance of the bacterium to Hg2+-induced lipid peroxidation was observed as indicated by 40% lower conjugated diene and 60% lower lipid hydroperoxide content compared to a non-mercury resistant strain Pseudomonas aeruginosa (ATCC 27853). Phospholipid (PL) analysis of both the species reveled intrinsic differences in their PL composition. We observed 80% PE, 15% PG and 5% of an unidentified PL (U) in MRP compared to 65% PE, 20% PG and 17% CL in Pseudomonas aeruginosa (ATCC 27853). Mercury toxicity led to significant reorganization of PL in Pseudomonas aeruginosa (ATCC 27853) compared to MRP. While HgCl2 led to 25% increase in PE, 35% depletion in CL and 27% depletion in PG content of Pseudomonas aeruginosa (ATCC 27853), MRP exhibited only 5% enhancement in PE content that was accompanied by 20% depletion in PG content, indicating that MRP resists mercury induced PL organization. Interaction of the MRP with polystyrene surface showed two fold higher Hg2+-induced exopolysaccharide secretion and elevated biofilm forming ability compared to Pseudomonas aeruginosa (ATCC 27853). Our investigation reveals a novel Pseudomonas spp. with high Hg2+-tolerance mechanisms that can be utilized for efficient bioremediation of mercury

Uniqueness theorems related to weighted sharing of two sets

Using the notion of weighted sharing of sets, we study the uniqueness problem of meromorphic functions sharing two finite sets. Our results are inspired from an article due to J. F. Chen (Open Math., 15 (2017), 1244–1250)

Anomalous transport regime in non-Hermitian, Anderson-localizing hybrid systems

In a disordered environment, the probability of transmission of a wave reduces with increasing disorder, the ultimate limit of which is the near-zero transmission due to Anderson localization. Under localizing conditions, transport is arrested because the wave is trapped in the bulk of the sample with decaying-exponential coupling to the boundaries. Any further increase in disorder does not modify the overall transport properties. Here, we report the experimental demonstration of a hitherto-unrealized anomalous transport of hybrid particles under localizing disorder in a non-Hermitian setting. We create hybrid polariton-photon states in a one-dimensional copper sample with a comb-shaped periodic microstructure designed for microwave frequencies. Metallic dissipation realizes the necessary non-Hermiticity. Disorder is introduced by deliberate alterations of the periodic microstructure. Direct measurement of wave-functions and phases was achieved by a near-field probe. At a particular disorder, We observe the onset of Anderson localization of the hybrid states endorsed by exponential tails of the wavefunction. However, at stronger disorder and under conditions that support localization, an unexpected enhancement in the transmission was facilitated by an emergent mini-band. The transmission was traced to the hopping of the hybrid particle over multiple co-existing localized resonances that exchange energy due to the non-orthogonality. These emergent states are manifested in all configurations under strong disorder, suggesting the formation of a novel transport regime. This is verified by measuring the averaged conductance which endorses an anomalous transport regime in the hybrid, non-Hermitian environment under strong disorder. These experimental observations open up new unexplored avenues in the ambit of disorder under non-Hermitian conditions.Comment: 7 pages, 5 figure

Failure analysis of a spring for a fuel pump bracket assembly

33-36This investigation is primarily aimed to examine the premature failure of a spring used in a fuel pump bracket assembly. Preliminary visual examinations along with detailed SEM studies are made on the damaged surface and fracture surface of the failed spring. In addition, microstructural investigations along with hardness measurements are carried out to understand the reason for the premature failure. Finally, it is concluded that improper heat treatment of the spring material is responsible for failure

First Chemosensor for Selective Detection and Quantification of L‑4-Hydroxyproline in Collagen and Other Bio Samples

Amino pyridine-based rhodamine conjugate (APR) has been developed as a first chemosensor for selective detection and quantification of L-4-Hydroxyproline (Hyp). The “turn-on” fluorescence property of the chemosensor makes it unique for easy estimation of Hyp in collagen and biological samples

Not Available

Not AvailableAttempt was made to study the impact of intermittent irrigations and different nitrogen (N) doses on growth, yield, N use efficiency and water footprints of rice. A rice cultivar, ‘Lalat’ was grown with 3 water regimes in main plots (W1 = continuous flooding of 5 cm, W2 = irrigation after 2 days of water disappearance, W3 = irrigation after 5 days of water disappearance) and 5 N levels in subplots (N1=0 kg N ha-1, N2=60 kg N ha-1, N3=90 kg N ha-1, N4=120 kg N ha-1, N5=150 kg N ha-1). Among water management, lowest mean water footprint (WFP) was observed with W2 but it was at par with W1. Yield, biomass and leaf area also did not significantly differ (P> 0.05) between W1 and W2, but these were significantly lower in W3. These results suggest W2 can reduce water input without affecting rice yields. On the other hand, water productivity in terms of irrigation was higher in W3 though grain yield was less under this treatment. Among N treatments, the lowest average WFP of 1277 m3 t-1 was achieved under 150 kg N ha-1 which was at par with 120 kg N ha-1 but highest WFP of 2532 m3 t-1 was observed when no N was applied. The reduction of WFP with higher dose of N was attributed to mainly increased grain yield of rice. No significant water×nitrogen interactions on biomass, grain yield, WFP, N uptake and N use efficiency were observed.Not Availabl