Tuning kondo physics in graphene with gate voltage

We show theoretically that graphene, which exhibits a massless dirac-like spectrum for its electrons, can exhibit unconventional kondo effect that can be tuned by an experimentally controllable applied gate voltage. We demonstrate the presence of a finite critical Kondo coupling strength in neutral graphene. We discuss the possibility of multichannel Kondo effect in this system which might lead to a non-fermi liquidlike ground state and provide a discussion of possible experimental realization of Kondo phenomenon in graphene

Effect of Pinching and Growth Retardants on Growth and Flowering in African Marigold Cv. Pusa Narangi Gainda

A study on the effect of pinching and application of growth retardants on growth and flowering in African marigold cv. 'Pusa Narangi Gainda' was carried out in the experimental field of Division of Floriculture and Landscaping, Indian Agricultural Research Institute, New Delhi. Treatments comprised pinching, CCC applied at 1000ppm, 1500ppm or 2000ppm, MH at 500ppm, 1500ppm or 2000ppm; B-9 at 500ppm, 750ppm or 1000ppm, and a Control (no pinching). CCC at 2000ppm recorded minimum plant height (46.0cm), maximum plant-spread (56.0cm) and maximum number of branches (19.0), whereas, maximum plant height (67.0cm), minimum plant-spread (29.66cm) and minimum number of branches (5.33) were recorded in Control (non-pinching). As for flowering and yield, application of CCC at 2000ppm recorded maximum flowering-duration (25.33 days), number of flowers per plant (40), single-flower weight (119.46g), flower yield per plant (408.10g), flower yield per unit area (17.83t/ha) and seed yield per plant (17.80 g), Maximum flower diameter (7.93cm) was recorded with application of CCC 2000ppm, whereas, minimum was recorded with pinching (6.2cm). Spray of growth retardants enhanced flower yield compared to that in Control (no pinching). Maximum shelf-life of flower was recorded with CCC 2000ppm (3.66 days), whereas, minimum was recorded with pinching and non-pinching (2.33 days). Thus, application of CCC at 2000ppm is superior to other treatments tested for increasing flower yield in marigold

What do you fear?: A study on user generated health data and privacy behavior

Health tracking wearables used outside the clinical settings to monitor an individual’s health are widely used recently despite the information privacy concerns these devices evoke. Academic research addressing the effect of fear appeals on information privacy in the context of user-generated health data is scarce. It is important to understand what is an individual’s perspective on health data privacy and the influence of fear appeals on privacy behavior. The present exploratory qualitative study captures an individual’s perspective of information privacy on health data from 27 respondents using an adapted extended parallel process model. The study reveals what individuals perceive as threats and their extent of efficacy to handle the concerns over information privacy. It is observed, fear appeals influenced the respondents to choose between danger control or fear control behavior. This study provides an insight into the importance of an individual’s privacy and their behavioral change, which could prove useful for manufacturers and regulators

Evaluating the performance of horizontal subsurface flow constructed wetlands using natural zeolite (escott)

The objective of the present study was to assess the simultaneous removal of physiochemical parameters in moderate strength wastewater using a lab scale horizontal subsurface flow constructed wetland (HFCW) with natural zeolite as a substrate. In this study, high-density polyethylene tanks (0.36 m2) were planted with phragmites australis and scirpus maritimus and received 0.012 m3/d to 0.08 m3/d of synthetic wastewater corresponding to a HLR of 0.035 to 0.243 m/d and a COD loading rate of 0.0148 kg COD (m2.d)-1 to 0.026 kg COD (m2.d)-1. The HFCW was subjected to three hydraulic retention times (HRT) for 4, 3 and 2 days respectively. Averaged data reported coincided with the plant age (4 to 55 weeks) and covered the entire cold season and early part of the hot season. Based on the 55 weeks of operation, the HFCW unit with zeolite achieved significantly higher removal for COD (85 to 88%), TN (54 to 96%), NH4-N (50 to 99%) and TSS (91 to 96%) respectively at all HRT. This system was proved to be tolerant to high organic loadings and nutrients, suggesting these substrates as viable options for biological treatment of wastewater

FREE RADICAL SCAVENGING AND ANTIOXIDANT PROPERTIES OF MARINE RED ALGAE HYPNEA MUSCIFORMIS

Objective: The study focused on determining the antioxidant properties of the Hypnea musciformis methanol crude extracts, from the red algae.Methods: The evaluation of antioxidant properties was determined by 1,1-diphenyl-2-picrylhydrazyl (DPPH), 2,2'-azinobis 3ethylbenzthiazoline-6-sulphonic acid (ABTS), ferric reducing antioxidant power (FRAP), nitric oxide scavenging assay (NO), reducing power, superoxide radical scavenging (SOD), hydroxyl and hydrogen peroxide radical assay, the metal chelating activity as well as phosphomolypdenum assay.Results: Among the tested red algae, the maximum antioxidant activity was recorded in the methanol extract of Hypnea musciformis. Whereas methanolic crude extract of red algae and diatom showed good antioxidant potential.Conclusion: This study suggests that methanolic crude extracts contain different potential antioxidant compounds capable to scavenge different types of free radicals.Â

Leakage Power Reduction Techniques in Deep Submicron Technologies for VLSI Applications

AbstractThe leakage power dissipation has become one of the most challenging issues in low power VLSI circuit designs especially with on-chip devices as it doubles for every two years[4]-[5]. The scaling down of threshold voltage has contributed enormously towards increase in subthreshold leakage current thereby making the static (leakage) power dissipation very high. According to International Technology Roadmap for Semiconductors (ITRS), the total power dissipation may be significantly contributed by leakage power dissipation [1]. The battery operated devices with long duration in standby mode may be drained out very quickly due to the leakage power. In CMOS submicron technologies, leakage power dissipation plays a significant role. However, various low power design techniques for efficient minimization of leakage power are proposed in the literature review. A comprehensive study and analysis of various leakage power minimization techniques have been presented in this paper. The present research study and its corresponding analysis are mainly focusing on circuit performance parameters. It is implied from the current literature that only an appropriate choice of leakage power minimization technique for a specific application can be effectively carried by a VLSI circuit designer based on sequential analytical approach

PROTECTIVE EFFECT OF THYMOQUINONE ON THE LIVER TISSUES OF 7, 12-DIMETHYLBENZ (A) ANTHRACENE INDUCED EXPERIMENTAL BREAST CANCER RATS

Objective: Thymoquinone (TQ), the main active ingredient of the volatile oil isolated from the Nigella sativa seeds has been shown to possess a widearray of pharmacological effects. Recently, we have reported the anticancer potential of TQ in 7, 12-dimethylbenz (a) anthracene (DMBA) inducedrats. DMBA acts as a potent site and organ-specific carcinogen by generating various reactive metabolic intermediates leading to oxidative stress. Thepresent study was hypothesized to explore the protective effect of TQ against DMBA induced liver injury in rats.Methods: DMBA was used to induce breast cancer in rats. Oral treatment of TQ (25 mg/kg body weight) to DMBA induced rats daily for 4 weeks wasfound to be effective against DMBA induced mammary gland carcinogenesis in female Wistar rats. The levels of nucleic acids, oxidative stress markand antioxidants were determined. The activities of Phase I and Phase II enzymes, tricarboxylic acid (TCA) cycle enzymes were assayed.Results: The increased levels of DNA and RNA were found to be decreased on treatment with TQ. The altered activities of Phase I and Phase IIbiotransformation enzymes were found to be regulated on treatment with thymoqionone. The hepatoprotective nature of TQ was assessed byanalyzing the markers of oxidative stress, and antioxidant competence in DMBA induced rats. Treatment with TQ revealed a significant decline in thelevels of lipid peroxides, and a significant improvement in the levels of enzymatic and non-enzymatic antioxidants in the liver tissue. In addition, TQmodulated the activities of TCA cycle enzymes.Conclusion: The results of the present study clearly indicate that TQ protects the tissues from oxidative stress-mediated damage which is evidentfrom improved antioxidant status.Keywords: 7, 12-dimethylbenz (a) anthracene, Thymoquinone, Oxidative stress, Liver tissues, Antioxidant potential