Loschmidt echo with a non-equilibrium initial state: early time scaling and enhanced decoherence

We study the Loschmidt echo (LE) in a central spin model in which a central spin is globally coupled to an environment (E) which is subjected to a small and sudden quench at $t=0$ so that its state at $t=0^+$, remains the same as the ground state of the initial environmental Hamiltonian before the quench; this leads to a non-equilibrium situation. This state now evolves with two Hamiltonians, the final Hamiltonian following the quench and its modified version which incorporates an additional term arising due to the coupling of the central spin to the environment. Using a generic short-time scaling of the decay rate, we establish that in the early time limit, the rate of decay of the LE (or the overlap between two states generated from the initial state evolving through two channels) close to the quantum critical point (QCP) of E is independent of the quenching. We do also study the temporal evolution of the LE and establish the presence of a crossover to a situation where the quenching becomes irrelevant. In the limit of large quench amplitude the non-equilibrium initial condition is found to result in a drastic increase in decoherence at large times, even far away from a QCP. These generic results are verified analytically as well as numerically, choosing E to be a transverse Ising chain where the transverse field is suddenly quenched.Comment: 5 pages, 6 figures; New results, figures and references added, title change

Prevention of Protein Oxidation in Chicken Meat during Chilled Storage Using Chitosan Gelatin Films with Green Tea Extracts

In present study, the usability of chitosan and gelatin (1:1) films incorporated with green tea extract (GTE) to improve the shelf life of the chicken meat stored in chilled condition was evaluated. The extract of green tea was evaluated for its phenolic content, antioxidant activity and ferric ion chealating ability. The ChGel films possessed antimicrobial activity and inactivated approximately 3 log cfu/ ml of K. pneumoniae, S. typhi var. Weltevreden, S. typhi var. Oslo, Y. enterocolitica, E. feacalis, B. cereus, E. coli and S. aureus in 3 hours. Incorporation of GTE influenced the optical and mechanical properties of the films. Chicken samples without films were observed to be microbiologically safe for not more than 6 days, while ChGel and ChGel-GTE films improved the microbial safety of chicken samples till day 13. ChGel-GTE films also prevented lipid peroxidation in samples as evident by TBARS value (day 10: control: 1.14; ChGel-GTE: 0.21 mg MDA eq/kg). Protein oxidation during chilled storage of chicken was also prevented by ChGel-GTE by inhibiting protein carbonylation, loss of free thiols groups in protein and lowering the number of disulphde bonds. This study supports use of ChGel films with GTE for enhancing the safety of stored chicken meat not only by maintaining the microbial quality of the samples but also preventing oxidative changes which can hamper the functional, nutritional and sensorial properties

A rare case report of ovarian torsion with sigmoid volvulus

Ovarian torsion results from twisting of the ovary about the suspensory ligament, which contains the ovarian artery and vein, lymphatic’s, and nerves. Volvulus is a torsion of a segment of the alimentary tract, that often leads to intestinal obstruction. Ovarian torsion leading to sigmoid volvulus is the rarest complication which authors found in this case. Hence the case was presented. A 28-year-old women presented with acute pain in abdomen since 14 hours, followed by 2 episodes of vomiting, abdominal distension since 10 hours. Plain X-ray Abdomen erect was done which showed ‘Coffee bean’ sign with multiple air fluid levels suggestive of sigmoid volvulus. On laparotomy, after opening the peritoneum, large right ovarian cyst around 12×11×10 cm with solid and haemorrhagic content with long pedicle around 8 cm with 3 turns of torsion was noted. Abutting the ovarian mass, sigmoid colon was seen twisted around its mesentery including the twisted ovarian pedicle. Hence, the twisted component included the twisted ovarian pedicle and twisted sigmoid mesentery. Stepwise detorsion of ovarian pedicle followed by oophorectomy was done. For sigmoid volvulus, resection of vascular compromised sigmoid colon and descending colon stoma was done. Reanastomosis was done later after 3 months post operatively

An interesting case report of ruptured pyogenic liver abscess with 40 weeks gestation in labour

Pyogenic liver abscess during pregnancy is an extremely rare condition. Although rare, in situations of sepsis or septic shock in pregnancy, as well as the common sources of infection, a possibility of a liver abscess should be considered. We present a case report of 32-year-old primigravida 37.3 weeks by date, 37 weeks by scan with breech presentation with premature rupture of membranes and pain in abdomen since 12 hours with breathlessness, fever and diarrhoea since 2 days came in emergency to study hospital. General condition of the patient on arrival was pulse-140 beats per minute, blood pressure was 90/60 mmHg, respiratory rate was 40/min, on per abdominal examination, breech presentation with fetal heart rate of 150 beats per minute on doppler was noted. Per vaginal examination revealed cervical os 5 cm dilated, 40% effacement, breech presentation, absent membranes. With urgent report of complete hemogram and acid blood gas analysis, metabolic acidosis was noted which was corrected and patient was taken for emergency lower segment caesarean section. Intra-operative, 250 ml greenish pus flakes fluid was noted inside the abdominal cavity. Fluid was drained and sent for culture sensitivity with maximum aseptic precautions, uterus was opened, baby was delivered followed by uterus closure. Ruptured liver abscess 6×4×2 cm in 2nd and 3rd segment of liver was noted, abdominal wash with antibiotics and NS was given, drain was kept. Appropriate antibiotics were started and was discharged on day 14 after suture removal

Condition monitoring of induction motor-vibration analysis technique

Condition Based Monitoring maintenance implies that a precautionary job should be executed at a convinced state of hardware. Such technique stands to be considerably additional cost effective than complete letdown of equipment. When racing to disappointment, an impromptu interference to creation is instigated. Likewise, an inadvertent blow-back may happen, leading to costly consequences. Extra parts or spare parts stock must be kept to replace in case of failure of parts. Booked preventive support results typically in repairing, fixing or supplanting parts, driving in an upkeep that is too exorbitant and ineffective in forestalling breakdowns. To further develop accessibility, the framework is upgraded for higher constancy and the necessity for support is restricted. Maintenance is likewise being completed in a most viable way, furthermore, in an arranged approach. Finally, some condition markers are checking to notice decay and recognize disappointments. This task is focused on the examination of Industrial Induction Motor and distinguishing conceivable condition pointers dependent on vibration estimations and investigation

Energy optimization of industrial drive at Sanjivani sugar factory

India's power sector is facing an actuate problem of meeting the growing demand of electricity. Improving energy efficiency by employing energy efficient devices would be the better alternative for meeting apart of the new demand. The use of energy efficient motor instead of standard induction motor in agricultural and industrial sector. It will result into substantial saving in electrical energy over a standard motor. The effort taken introduced in this paper analyze use of additional energy in different norm in a cycle plant in addition energize the utilization of energy productive motor over standard Induction Motor with boundary like motor input power (kVA), energy consumed (kWh), apparent power, power factor and efficiency (kW)

Complications of gynaecologic laparoscopy: an audit

Background: Minimal access surgery as a modality of treatment for various gynecologic conditions is rapidly gaining grounds in the recent years1. Approximately 30 years after its introduction; the use of laparoscopy in gynecology has evolved from diagnostic purposes into a more coordinated system for the repair or removal of diseased abdominal and pelvic organs. The rapid increase in the number of procedures being performed, the introduction of new equipment, and variability in the training of surgeons all contribute to the complication rate. The objective is to review complications associated with laparoscopic gynecological surgeries and identify associated risk factors.Methods: Hospital based descriptive observational study performed between January 2013 to December 2017 which included all gynecologic laparoscopies performed in present institute. Variables were recorded for patient characteristics, indication for surgery, length of hospital stay (in days), major and minor complications, conversions to laparotomy and postoperative complications. The laparoscopic procedures were divided into three subgroups: Diagnostic cases, tubal sterilization and Advanced operative laparoscopy.Results: Of all 3724 laparoscopies included, overall frequency of major was 1.96 %, and that of minor complications was 3.51%. Of 3724 laparoscopic procedures, 214 complications occurred (5.8% of all procedures) and one death occurred. The level of technical difficulty and existence of prior abdominal surgery were associated with a higher risk of major complications and conversions to laparotomy.Conclusions: Laparoscopic surgery has many advantages, but it is not without complications. Despite rapidly improving technical equipment’s and surgical skill; complication rates and preventable injuries demonstrate continuous pattern. Delayed recognition and intervention add to morbidity and mortality. Each laparoscopic surgeon should be aware of the potential complications, how they can be prevented and managed efficiently

Effect of Oxygen Content on Magnetic Properties of Layered Cobaltites PrBaCo2O5+\delta

The effect of oxygen content on the magnetic properties of the layered perovskites has been investigated. The samples, PrBaCo$_{2}$O$_{5+\delta}$ (0.35 $\leq \delta \leq$ 0.80) were prepared by sol-gel method and characterized by X-ray diffraction and DC magnetization. A detailed magnetic phase diagram for PrBaCo$_{2}$O$_{5+\delta}$ is presented. It is found that unlike in the case of heavier rare-earths, ferromagnetic interactions are present at all temperatures below Tc and even in the antiferromagnetically ordered phase. Moreover, in compounds with lower oxygen content, short range ferromagnetic interactions are present even above Tc. This dependence of magnetic properties on oxygen content in these layered perovskites has been linked to the changes in polyhedra around the Co ions.Comment: 20 pages, 10 figures; J. Appl. Phys. vol. 110 issue 5 (2011

DEVELOPMENT AND VALIDATION OF FIRST ORDER DERIVATIVE SPECTROPHOTOMETRIC METHOD FOR SIMULTANEOUS ESTIMATION OF PARACETAMOL AND TAPENTADOL HYDROCHLORIDE IN TABLET DOSAGE FORM

A simple, precise, accurate and reproducible spectrophotometric method has been developed forSimultaneous estimation of Paracetamol and Tapentadol Hydrochloride by employing first order derivativezero crossing method in 0.1 N Sodium Hydroxide. The first order derivative absorption at 257.1 nm (zerocross point of Paracetamol) was used for quantification of Tapentadol HCl and 289.0 nm (zero cross point ofTapentadol HCl) for quantification of Paracetamol. The linearity was established over the concentrationrange of 15-3