InAs-AlSb quantum wells in tilted magnetic fields

InAs-AlSb quantum wells are investigated by transport experiments in magnetic fields tilted with respect to the sample normal. Using the coincidence method we find for magnetic fields up to 28 T that the spin splitting can be as large as 5 times the Landau splitting. We find a value of the g-factor of about 13. For small even-integer filling factors the corresponding minima in the Shubnikov-de Haas oscillations cannot be tuned into maxima for arbitrary tilt angles. This indicates the anti-crossing of neighboring Landau and spin levels. Furthermore we find for particular tilt angles a crossover from even-integer dominated Shubnikov-de Haas minima to odd-integer minima as a function of magnetic field

Impact of paddy straw mulch on germination and growth of celery (Apium graveolens L.) seedlings and associated weeds in nursery

A study was undertaken during three consecutive rabi seasons of 2014–15 to 2016–17 at the Research Farm, Department of Agronomy, Punjab Agricultural University, Ludhiana (Punjab) to determine the effect of paddy straw mulch load and retention time on the germination and growth of celery and associated weeds. The experiment was conducted in randomized complete block design (RCBD) with nine treatments viz., paddy straw mulch @ 4 and 6 t ha-1 with retention time of 15, 20, 25 days after sowing (DAS), full time retention (60 DAS), and control (without mulch). The results indicated that application of paddy straw mulch @ 4 or 6 t ha-1 significantly improved the germination of celery in nursery as compared to no mulch treatment but retention of paddy straw mulch beyond 20 days after sowing suppressed the celery seedlings adversely resulting in lowering seedling population as well as fresh and dry weight of celery seedlings. Application of paddy straw mulch @ 4 or 6 t ha-1 resulted in significantly lower density and dry weight of weeds as compared to control. Further, each successive increase in retention time of paddy straw mulch from 15 DAS to full time retention (60 DAS) through 20 and 25 DAS significantly reduced the weed population in celery nursery

Spontaneous expulsion of a large infarcted endometrial polyp

A 30-year-female presented to gynaecology OPD with history of polymenorrhea for two months.  Cervical scrape smear was negative for intraepithelial lesion/malignancy. The importance of sending the tissue for histopathological examination cannot be undermined considering the fact that the differential diagnosis includes malignancy

Pattern of adverse drug reactions with chemotherapeutic drugs in a tertiary care hospital of North India: a retrospective study

Background: Adverse drug reactions are important causes of mortality and morbidity in the patients. Early detection, evaluation and monitoring of ADRs is essential to improve public health. Methods: This was an observational, non-interventional and retrospective study conducted at the ADR monitoring centre of a tertiary care hospital of North India. Suspected ADR forms reported over a period of 4 years involving at least one chemotherapeutic drug with at least one dose were analyzed. Results: A total of 261 chemotherapeutic drugs associated ADRs were analyzed. Out of these, maximum numbers of ADRs were reported by males (54%). Maximum reporting was done by Skin and VD department (37.93%). Causality assessment was probable in maximum number of cases (54%). Most common ADRs were skin rashes (21.46%), followed by jaundice, urticaria and fixed drug eruptions. Maximum ADRs were suspected to be caused by Anti tubercular drugs (31.42%) followed by anticancer drugs (14.56%). Conclusions: ADRs due to antibiotics and anticancer drugs is a significant health problem

Infrared imaging and spectral-domain optical coherence tomography findings correlate with microperimetry in acute macular neuroretinopathy: a case report

<p>Abstract</p> <p>Introduction</p> <p>Spectral-domain optical coherence tomography findings in a patient with acute macular neuroretinopathy, and correlation with functional defects on microperimetry, are presented.</p> <p>Case presentation</p> <p>A 25-year old Caucasian woman presented with bitemporal field defects following an upper respiratory tract infection. Her visual acuity was 20/20 in both eyes and a dilated fundus examination revealed bilateral hyperpigmentary changes in the papillomacular bundle. Our patient underwent further evaluation with spectral-domain optical coherence tomography, infrared and fundus autofluorescence imaging. Functional changes were assessed by microperimetry. Infrared imaging showed the classic wedge-shaped defects and spectral-domain optical coherence tomography exhibited changes at the inner segment-outer segment junction, with a thickened outer plexiform layer overlying these areas. Fluorescein and indocyanine green angiography did not demonstrate any perfusion defects or any other abnormality. Microperimetry demonstrated focal elevation in threshold correlating with the wedge-shaped defects in both eyes.</p> <p>Conclusion</p> <p>Spectral-domain optical coherence tomography findings provide new evidence of the involvement of the outer plexiform layer of the retina in acute macular neuroretinopathy.</p

Dissecting DNA Damage Responses in Arabidopsis: A High-Throughput Sequencing Approach

Cells are constantly bombarded with mutagens, both endogenous and exogenous in origin. Endogenous sources of mutation include reactive oxygen species formed during aerobic respiration, replication errors by DNA polymerase, and spontaneous deamination and depurination (Jackson 2009). Exogenous sources of mutation include UV and ionizing radiation, aflatoxins, and polycyclic aromatic hydrocarbons (i.e. compounds found in diesel exhaust and cigarette smoke). As a result, thousands of DNA lesions are created every day. Lesions can stall and impede DNA transcription and replication if they are not removed by DNA repair mechanisms or bypassed by replication. Phosphoinositide 3-kinase (PI3-K) related protein kinases (PIKKs) regulate the DNA damage response in cells (Cimprich 2008). Commonly referred to as the “sentries to the gate of genome stability,” ataxia-telangiectasia mutated (ATM) and ATM and RAD3-related (ATR) promote signaling, cell cycle arrest, and DNA repair in the face of DNA damage. Arabidopsis thaliana plants lacking ATR, when irradiated with UVB, incur elevated stem cell death in growing root tips (Furukawa 2010). Programmed cell death (PCD) is an important protective mechanism that restores tissue homeostasis in stem cell niches and prevents the accumulation of irreparably damaged cells in tissues, albeit with a delay in growth. Without ATR to stabilize damaged replication forks, double strand breaks (DSBs) occur where there is persistent ssDNA, and ATM or ATR (partially redundant in this signaling capacity) initiate repair or PCD if DSBs accumulate. In plants lacking both ATR and ATM, UV-B irradiation results in less stem cell death than in wild type plants. In attempts to cross atr[superscript -/-] plants with an EMS-mutagenized line, we discovered a root terminating phenotype which appears to be dependent on ATR and an unknown gene (ursu). We are using Illumina high-throughput genome sequencing and bioinformatic techniques to map the location of this additional gene

Major and minor fisheries harbours of India. 8. Fisherries harbours along the coasts of North Andhra Pradesh, Orissa and West Bengal

The present account gives information about the three major and five minor fisheries harbours along the coasts of north Andhra Pradesh, Orissa and West Benga

Zero-field spin splitting in InAs-AlSb quantum wells revisited

We present magnetotransport experiments on high-quality InAs-AlSb quantum wells that show a perfectly clean single-period Shubnikov-de Haas oscillation down to very low magnetic fields. In contrast to theoretical expectations based on an asymmetry induced zero-field spin splitting, no beating effect is observed. The carrier density has been changed by the persistent photo conductivity effect as well as via the application of hydrostatic pressure in order to influence the electric field at the interface of the electron gas. Still no indication of spin splitting at zero magnetic field was observed in spite of highly resolved Shubnikov- de Haas oscillations up to filling factors of 200. This surprising and unexpected result is discussed in view of other recently published data.Comment: 4 pages, 3 figures, submitted to Phys. Rev.