Elevated CO2 ameliorates the high temperature stress effects on physio-biochemical, growth, yield traits of maize hybrids

The rising temperatures and levels of carbon dioxide in the atmosphere are anticipated to have a significant impact on the productivity of agricultural crops. Although, the individual effects of elevated CO2 and temperature have been extensively studied in C3 and C4 crops, there remains a scarcity of research investigating their interactive effects specifically on maize hybrids. The impact of elevated temperature and its interaction with elevated CO2 on phenology, physiology, biomass, and grain yield of maize hybrids was assessed in a field experiment using Free Air Temperature Elevation (FATE) facility. The results showed that elevated temperature (eT) increased the anthesis silking interval (ASI), while the presence of elevated CO2 along with elevated temperature (eT + eCO2) mitigated this effect. The differential expression were observed between hybrids depending on their genetic potential. Furthermore, the net photosynthetic rate (Anet), stomatal conductance (gs), and transpiration rate (Tr) of hybrids decreased under elevated temperature but eT + eCO2 condition helped in reverting its impact to some extent. In term of leaf composition, the highest level of total soluble sugars (TSS) and starch was observed under eT + eCO2 conditions, possibly due to improved Anet in the presence of elevated eCO2. The negative impact of eT was also evident through increased proline and MDA content, but eT + eCO2 ameliorated the adverse effect of eT. The biomass and grain yield also responded similarly, among the hybrids 900M GOLD recorded superior performance for grain yield at eT condition exceeding 35 °C. On the other hand, DHM117 experienced a significant reduction in grain yield under eT, but performed better under eT + eCO2 due to its improved physiological response to eCO2. The study indicated that elevated levels of carbon dioxide can actually mitigate the detrimental effects of elevated temperature on maize crop. This positive impact on maize crop can be attributed to an enhanced physiological performance in the presence of eCO2 which enables the plants to maintain satisfactory yield levels despite the challenging environmental conditions.

Recurrent Giant Cell Tumour of Maxilla: A case report and review of literature

Giant cell tumors (GCTs) are rare, locally aggressive neoplasms that commonly affect the long bones. However, GCTs can also occur in the craniofacial region, including the maxilla. This case report presents a rare case of recurrent giant cell tumor of the maxilla in a 32-year-old male patient. The patient underwent a total maxillectomy with clear margins, which resulted in successful local control. This report highlights the clinical presentation, diagnostic approach, treatment modalities, and favorable prognosis associated with recurrent giant cell tumors of the maxilla.

Isolated adult ileocecal intussusception in sigmoid colon due to non-specific inflammation

Adult ileocecal intussusception due to non-specific inflammation is a rare condition. Intussusception is the intestinal segment telescoping into the adjacent intestinal lumen. Typically, a pathological lesion is discovered with a high percentage of malignancy. Intussusception of the most common ileocolic kind includes the appendix, but it is uncommon for an appendix to serve as the lead point. The patient was admitted to the emergency department with a complaint of acute intestinal obstruction. After getting a diagnostic workup, an exploratory laparotomy was done, and the ileocecal and ascending colon segment was intussuscepted directly into the sigmoid colon. Transverse and descending colon were normal, and resection of necrosed intussuscepted bowel, primary repair of sigmoid colon with ileostomy with transverse colon as distal mucus fistula done, after the 3-month restoration of bowel continuity done, patient discharged and doing well. After the diagnosis of intussusception, the best surgical choice is in the hands of an experienced surgeon.

Isolated cysticercosis of breast mimicking a mass lesion: A case report

INTRODUCTION AND IMPORTANCE

Cysticercosis is a zoonotic disease caused by the larval form of Taenia solium. Its occurrence as a breast lump is rarely observed and therefore presents significant diagnostic challenges, especially in non-endemic regions.

CASE PRESENTATION

A 25-year-old female patient presented with a lump in her left breast. The lesion was initially non-diagnostic on ultrasound and fine needle aspiration cytology. Excision biopsy of the cystic lesion was done, and histopathological examination confirmed it to be cysticercosis. Post surgery patient was given Albendazole, and she was asymptomatic during the 3 month follow up.

CLINICAL DISCUSSION

This case highlights the disease's ability to present in atypical forms, such as a breast lump, and the importance of considering cysticercosis in differential diagnosis, especially in endemic regions. Ultrasonography remains the preferred initial diagnostic modality, and the role of FNAC and histopathology is crucial for confirmation. The case also emphasizes the need for heightened clinical suspicion, even when traditional risk factors like pork consumption are absent.

CONCLUSION

This case emphasizes the importance of considering cysticercosis as a differential diagnosis for breast lumps, even with atypical presentation or in a non-endemic region. It highlights the need for greater awareness of this disease, stringent public health measures, and improved personal hygiene to combat its spread.

Role of cytopathology in diagnosing phaeohyphomycosis masquerading as nerve abscess in a lepromatous leprosy patient: A case report

INTRODUCTION AND IMPORTANCE

Phaeohyphomycosis is a rare fungal infection primarily affecting immunocompromised individuals. Its clinical manifestations are diverse, and diagnosis can be challenging, particularly when lesions mimic other conditions.

CASE PRESENTATION

A 66-year-old male, with a history of irregular leprosy treatment and prolonged steroid use, presented with symptoms suggestive of a nerve abscess. On examination, cystic swellings were observed on the left thumb and leg. Histopathological examination and fine needle aspiration cytology (FNAC) revealed melanized hyphae, leading to a final diagnosis of phaeohyphomycosis. The patient was treated with oral itraconazole, leading to regression in lesion size.

CLINICAL DISCUSSION

Leprosy patients on long-term steroids are especially susceptible. The pathogenicity of these fungi in immunocompetent people is believed to be due to melanin in their cell walls, which defends against host defenses. Diagnosis involves histopathological examinations, staining, and fungal culture. Treatment involves surgical excision and antifungal drugs. If untreated, it can lead to severe complications including fatal brain infections.

CONCLUSION

This case highlights the unusual presentation of phaeohyphomycosis mimicking a nerve abscess in a leprosy patient. It underscores the importance of a high degree of clinical suspicion in diagnosing such rare infections, particularly in immunocompromised individuals. It also emphasizes the value of FNAC in reaching a definitive diagnosis. Prompt diagnosis and appropriate treatment are essential to prevent potentially serious outcomes.

Analysis of application of digital image analysis in histopathology quality control

Introduction

A correct histopathological diagnosis is dependent on an array of technical variables. The quality and completeness of a histological section on a slide is extremely prudent for correct interpretation. However, this is mostly done manually and depends largely on the expertise of histotechnician. In this study, we analysed the application of digital image analysis for quality control of histological section as a proof-of-concept.

Material and methods

Images of 1000 histological sections and their corresponding blocks were captured. Area of the section was measured from these digital images of tissue block (Digiblock) and slide (Digislide). The data was analysed to calculate DigislideQC score, dividing the area of tissue on the slide by the tissue area on the block and it was compared with the number of recuts done for incomplete section.

Results

Digislide QC score ranged from 0.1 to 0.99. It showed an area under curve (AUC) of 98.8%. A cut-off value of 0.65 had a sensitivity of 99.6% and a specificity of 96.7%.

Conclusion

Digiblock and Digislide images can provide information about quality of sections. DigislideQC score can correctly identify the slides which require recuts before it is sent for reporting and potentially reduce histopathologists' slide screening effort and ultimately turnaround time. These can be incorporated in routine histopathology workflows and lab information systems. This simple technology can also improve future digital pathology and telepathology workflows.

Pest scenario of Helicoverpa armigera (Hub.) on pigeonpea during future climate change periods under RCP based projections in India

Gram pod borer, Helicoverpa armigera (Hub.) is the major insect pest of pigeonpea and prediction of number of generations (no. of gen.) and generation time (gen. time) using growing degree days (GDD) approach during three future climate change periods viz., Near (NP), Distant (DP) and Far Distant (FDP) periods at eleven major pigeonpea growing locations of India was attempted. Multi-model ensemble of Maximum (Tmax) and Minimum (Tmin) temperature data of four Representative Concentration Pathways viz., RCP 2.6, 4.5, 6.0 and 8.5 of Coupled Model Inter comparison Project 5 (CMIP5) models was adopted here. The increase in projected Tmax and Tmin are significant during 3 climate change periods (CCPs) viz., the NP, DP and FDP over base line (BL) period under four RCP scenarios at all locations and would be higher (4.7-5.1 °C) in RCP 8.5 and in FDP. More number of annual (10-17) and seasonal (5-8) gens. are expected to occur with greater percent increase in FDP (8 to 38%) over base line followed by DP (7 to 22%) and NP (5to 10%) periods with shortened annual gen. time (4 to 27%) across 4 RCPs. The reduction of crop duration was substantial in short, medium and long duration pigeonpeas at all locations across 4 RCPs and 3 CCPs. The seasonal no.of gen. is expected to increase (5 to 35%) with shortened gen. time (4 to 26%) even with reduced crop duration across DP and FDP climate periods of 6.0 and 8.5 RCPs in LD pigeonpea. More no. of gen. of H. armigera with reduced gen. time are expected to occur at Ludhiana, Coimbatore, Mohanpur, Warangal and Akola locations over BL period in 4 RCPs when normal duration of pigeonpeas is considered. Geographical location (66 to 72%), climate period (11 to 19%), RCPs (5-7%) and their interaction (0.04-1%) is vital and together explained more than 90% of the total variation in future pest scenario. The findings indicate that the incidence of H. armigera would be higher on pigeonpea during ensuing CCPs in India under global warming context.

Giant cell tumor of soft tissue: A case report

INTRODUCTION AND IMPORTANCE

Giant cell tumor of soft tissue (GCT-ST) is a rare primary neoplasm of soft tissues. It usually involves superficial and deeper soft tissues of upper and lower extremities, followed by trunk.

CASE PRESENTATION

A 28-year-old female, presented with a painful mass in left abdominal wall for three months. On examination, it measured 4 × 4 cm with ill-defined margins. CECT showed ill-defined enhancing lesion deep to muscle planes with possible invasion of peritoneal layer. Histopathology showed multinodular architecture with intervening fibrous septa and metaplastic bony tissue encasing the tumor. Tumor composed of round to oval mononuclear cells and osteoclast like multinucleated giant cells. Mitotic figures were eight per hpf. A diagnosis GCT-ST of anterior abdominal wall was made. Patient was treated with surgery followed by adjuvant radiotherapy. Patient is disease free at one year follow up.

CLINICAL DISCUSSION

These tumors mostly involve extremities and trunk and usually presents as a painless mass. Clinical features depend upon the exact location of the tumor. Common differential diagnosis includes tenosynovial giant cell tumors and malignant giant cell tumors of soft tissue and GCT of Bone.

CONCLUSION

Diagnosis of GCT-ST is difficult on cytopathology and radiology alone. Histopathological diagnosis should be done to rule out the malignant lesions. Complete surgical resection with clear resection margins is the mainstay of treatment. Adjuvant radiotherapy should be considered in case of incomplete resection. Long follow-up is necessary for these tumors as local recurrence and risk of metastasis cannot be predicted.

Evaluation of CNS depressant and anti-anxiety activities of leaves of Convolvulus pluricaulis

BACKGROUND

Convolvulus pluricaulis is a native plant that is commonly mentioned in Ayurveda as a Rasayana and is primarily recommended for use in mental stimulation and rejuvenation therapy. Convolvulus pluricaulis is used as a brain tonic. The plant is reported to be a prominent memory-improving drug. It is used as a psychostimulant and tranquilizer. It is reported to reduce mental tension.

OBJECTIVE

The present study aimed to explore the protective effect of hydroalcoholic extract from the leaves of Convolvulus pluricaulis, along with CNS depressant and anti-anxiety activities, in models of mice.

METHODS

The extract from leaves of Convolvulus pluricaulis were sequentially isolated with a mixture of water and alcohol solution in the soxhlet apparatus. An acute toxicity study was conducted as per OECD guidelines no. 423, in which 18 Albino male mice were treated with different doses (1, 10, 100, 500, 1000, and 2000 mg/kg) of hydroalcoholic extract of Convolvulus pluricaulis and assessed for toxicity parameters for 14 days. Various psychomotor activities of hydroalcoholic extract from leaves of Convolvulus pluricaulis for 100, 200, and 300 mg/kg doses were performed in mice by using various tests like actophotometer, open field, rota-rod, grip strength tests, elevated plus maze, hole board test, inclined plane, chimney test.

RESULTS

The hydroalcoholic extract from leaves of Convolvulus pluricaulis was found to fall under category 4 in the acute toxicity study. Therefore, 100, 200, and 300 mg/kg doses of hydroalcoholic extract of leaves of Convolvulus pluricaulis were selected for the further pharmacological study. The results of psychomotor tests (actophotometer, open field, rota-rod, grip strength, hole board test, inclined plane, chimney test, elevated plus maze, light-dark model) for test doses 100, 200, and 300 in mice showed CNS depressant and anti-anxiety effects.

CONCLUSION

Hydroalcoholic extract from leaves of Convolvulus pluricaulis at the 100, 200, and 300 mg/kg doses has shown CNS depressant and anti-anxiety effects in mice models.

A Comprehensive Review on PCSK9 as Mechanistic Target Approach in Cancer Therapy

PCSK9 is a strongly expressed protein in the liver and brain that binds to the LDLR and regulates cholesterol in the liver effectively. Other receptors with which it interacts include VLDLR, LRP1, ApoER2, and OLR1. PCSK9 gain-of-function results in lysosomal degradation of these receptors, which may result in hyperlipidemia. PCSK9 deficiency results in a lower amount of cholesterol, which reduces cholesterol's accessibility to cancer cells. PCSK9 regulates several proteins and signaling pathways in cancer, including JNK, NF-κВ, and the mitochondrial-mediated apoptotic pathway. In the liver, breast, lungs, and colon tissue, PCSK9 initiates and facilitates cancer development, while in prostate cancer cells, it induces apoptosis. PCSK9 has a significant impact on brain cancer, promoting cancer cell survival by manipulating the mitochondrial apoptotic pathway and exhibiting apoptotic activity in neurons by influencing the NF-κВ, JNK, and caspase-dependent pathways. The PCSK9 impact in cancer at different organs is explored in this study, as well as the targeted signaling mechanisms involved in cancer growth. As a result, these signaling mechanisms may be aimed for the development and exploration of anti-cancer drugs in the immediate future.

A Rare Case of Concurrent Ovarian Lesions: Ovarian Fibroma and Serous Cystadenoma in Contralateral Ovaries

Ovarian stroma and surface epithelium develop from two different embryological primordia and give rise to tumors of distinct characteristics. The simultaneous presence of two kinds of ovarian tumors in one patient is rare. Concurrent presence of a large ovarian fibroma in one ovary, and a serous cystadenoma in the seemingly normal-looking contralateral ovary was found in a 55-year-old woman. The unusual coexistence of these tumors warrants a closer and longer follow-up of the patient. To the best of our knowledge, this is the fourth case to be reported in the literature. All surgically isolated tissues should undergo detailed histopathological examination, including normal-looking tissues which are excised as a part of the procedure.

Restoring soil carbon in marginal land of Indian Himalayas: Impact of crop intensification and conservation tillage

Soil carbon (C) loss is the prime sign of land degradation, and C pools have a great impact on soil quality and climate change mitigation. Hence, a field experiment was conducted for three consecutive years to assess the impact of crop intensification and conservation tillage practices on changes in the C pool at different soil depths of marginal land of the Indian Himalayas. The experiment consisted of two intensified cropping systems viz., CS1-Summer maize (Zea mays L.) -rainy season maize-lentil (Lens esculenta L.) and CS2-Summer maize-rainy season maize-mustard (Brassica juncea (L.) Czern) and five tillage practices viz., No-till (NT); NT + live mulch of cowpea (NT + LMC); reduced tillage (RT); RT + LMC and conventional tillage (CT). Results revealed that CS2 produced significantly higher biomass, C retention efficiency (9.85%), and sequestrated greater C (0.42 Mg ha^-1 yr^-1) in the soil system than CS1. Of the various tillage practices, RT + LMC registered higher biomass and recycled greater biomass and C than those under other tillage practices. However, the highest soil organic carbon (SOC) content (7.03 g kg^-1) and pool (9.62 Mg ha^-1) in 0-10 cm depth were observed under NT + LMC. The non-labile C pool size under NT in 0-10 cm and 10-20 cm depths was significantly greater than those under CT. The NT + LMC sequestrated significantly higher SOC (0.57 Mg ha^-1 yr^-1) than other tillage practices. Thus, the study indicated that the adoption of an intensified maize-based system under RT + LMC or NT + LMC would increase SOC storage and C sequestration in marginal lands of the Indian Himalayas.

Exploring agricultural waste biomass for energy, food and feed production and pollution mitigation: A review

Globally agricultural production system generates a huge amount of solid waste. Improper agri-waste management causes environmental pollution which resulted in economic losses and human health-related problems. Hence, there is an urgent need to design and develop eco-friendly, cost-effective, and socially acceptable agri-waste management technologies. Agri-waste has high energy conversion efficiency as compared to fossil fuel-based energy generation materials. Agri-waste can potentially be exploited for the production of second-generation biofuels. However, composted agri-waste can be an alternative to energy-intensive chemical fertilizers in organic production systems. Furthermore, value-added agri-waste can be a potential feedstock for livestock and industrial products. But comprehensive information concerning agri-waste management is lacking in the literature. Therefore, the present study reviewed the latest advancements in efficient agri-waste management technologies. This latest review will help the researchers and policy planners to formulate environmentally robust residue management practices for achieving a green economy in the agricultural production sector.

Nanofertilizers for agricultural and environmental sustainability

Indiscriminate use of chemical fertilizers in the agricultural production systems to keep pace with the food and nutritional demand of the galloping population had an adverse impact on ecosystem services and environmental quality. Hence, an alternative mechanism is to be developed to enhance farm production and environmental sustainability. A nanohybrid construct like nanofertilizers (NFs) is an excellent alternative to overcome the negative impact of traditional chemical fertilizers. The NFs provide smart nutrient delivery to the plants and proves their efficacy in terms of crop productivity and environmental sustainability over bulky chemical fertilizers. Plants can absorb NFs by foliage or roots depending upon the application methods and properties of the particles. NFs enhance the biotic and abiotic stresses tolerance in plants. It reduces the production cost and mitigates the environmental footprint. Multitude benefits of the NFs open new vistas towards sustainable agriculture and climate change mitigation. Although supra-optimal doses of NFs have a detrimental effect on crop growth, soil health, and environmental outcomes. The extensive release of NFs into the environment and food chain may pose a risk to human health, hence, need careful assessment. Thus, a thorough review on the role of different NFs and their impact on crop growth, productivity, soil, and environmental quality is required, which would be helpful for the research of sustainable agriculture.

Adverse events and Breakthrough infections associated with COVID-19 vaccination in the Indian population

Vaccines against COVID‐19 provide immunity to deter severe morbidities associated with the infection. However, it does not prevent infection altogether in all exposed individuals. Furthermore, emerging variants of SARS‐CoV‐2 impose a threat concerning the competency of the vaccines in combating the infection. This study aims to determine the variability in adverse events and the extent of breakthrough infections in the Indian population. A retrospective study was conducted using a pre‐validated questionnaire encompassing social, demographic, general health, the status of SARS‐CoV‐2 infection, vaccination, associated adverse events, and breakthrough infections in the Indian population. Informed consent and ethical approval were obtained as per Indian Council of Medical Research (ICMR) guidelines. Participants, who provided the complete information, were Indian citizens, above 18 years, and if vaccinated, administered with either Covishield or Covaxin, were considered for the study. Data have been compiled in Microsoft Excel and analyzed for statistical differences using STATA 11. The responses from 2051 individuals fulfilling the inclusion criteria were analyzed. Among 2051, 1119 respondents were vaccinated and 932 respondents were non‐vaccinated. Among 1119 vaccinated respondents, 7 were excluded because of missing data. Therefore, out of 1112 vaccinated, 413 experienced adverse events with a major fraction of younger individuals, age 18–40 years, getting affected (74.82%; 309/413). Furthermore, considerably more females than males encountered adverse consequences to vaccination (p < 0.05). Among vaccinated participants, breakthrough infections were observed in 7.91% (88/1112; 57.96% males and 42.04% females) with the older age group, 61 years and above (odds ratio, 3.25 [1.32–8.03]; p = 0.011), and males were found to be at higher risk. Further research is needed to find the age and sex‐related factors in determining vaccine effectiveness and adverse events.

Significant higher adverse events following COVID‐19 vaccination in females in comparison to males.

Breakthrough infections among Indian population was found to be 7.91%.

Older people and males were found to be at high risk for getting breakthrough infections.

Antimicrobial resistance in neonates with suspected sepsis

SETTING

Nobel Medical College and Teaching Hospital, Biratnagar, Nepal.

OBJECTIVE

To determine the pattern of antimicrobial resistance and hospital exit outcomes in neonates with suspected sepsis in a tertiary neonatal intensive care unit (NICU).

DESIGN

This hospital-based cohort study was conducted to follow patients from January to December 2019. All identified cases of suspected sepsis were enlisted from hospital records.

RESULTS

Sepsis was suspected in 177 (88%) of the 200 cases admitted in the NICU; 52 (29%) were culture-positive. Pseudomonas was the predominant organism isolated (n = 40; 78%), followed by coagulase negative staphylococcus (n = 12, 23%). Nine (17%) of the 52 isolates were resistant to the Access and Watch group of antibiotics, including some resistance to Reserve group drugs such as imipenem and linezolid. Most treated cases (n = 170, 96%) improved, although 7 (4%) left against medical advice.

CONCLUSION

Most of the pathogens were resistant to WHO Access and Watch antibiotics and occasional resistance was observed to Reserve group drugs. Most sepsis was caused by Gram-negative bacilli. Improving turnaround times for antibiotic sensitivity testing using point-of-care testing, and a greater yield of culture-positive results are needed to enhance the management of neonatal sepsis.

Optimization of Man Power Deployment for Covid-19 Screening in a Tertiary Care Hospital: A Study of Utility of Queuing Analysis

OBJECTIVES

The recent Covid-19 pandemic has burdened the healthcare facilities, especially in the presence of limited infrastructure. We aimed at applying a queuing model to the Covid-19 screening area so as to optimize the screening services and ensuring that no patient is refused the service.

METHODS

The mean arrival time of patients, number of physicians, mean screening time and queue characteristics were observed and entered in the M/M/c/K queuing model using R programming to optimize the number of physicians required in the screening area.

RESULTS

Considering the mean arrival of 7 patients in 10 minutes and screening of 3 patients in 10 minutes by 1 physician, 2 physicians were assigned. At this capacity, the probability of saturation of the system was 15% with patient loss rate of 1.05 per 10 minutes. Queuing simulation with 3 physicians reduced the patient loss rate to 0.013 per 10 minutes and a saturation probability of 0.2%. However, an increase of arrival rate from 10 to 20 led to an early saturation of the system.

CONCLUSION

Queuing models offer an opportunity for the healthcare providers and hospital administrators to optimize patient care services, especially in critical areas with an ever-changing situation such as the current pandemic.

Comparison of asynchronous and synchronous methods of online teaching for students of medical laboratory technology course: A cross-sectional analysis

BACKGROUND

In the wake of the novel coronavirus pandemic, the closure of educational institutions has imposed a situation of potential gap in learning. Since training of medical and paramedical students is vital in creation of our army of these frontline health-care workers, this study was aimed at comparing the asynchronous and synchronous methods of online teaching for imparting training to students of medical laboratory technology (MLT).

MATERIALS AND METHODS

This cross-sectional study included 33 students of the 1^st-year batch of MLT course at a tertiary level hospital. Ten lectures each from the subject of biomedical statistics were delivered through asynchronous (lecture shared on WhatsApp group) and synchronous (online live lecture) methods followed by a brief examination for each topic. A short survey was designed to assess the students' perception of clarity of concepts, confidence of solving the examination, and their preference for one of these methods. Appropriate statistical tests were applied to the data.

RESULTS

Synchronous method of online teaching was preferred by majority of the students (P < 0.001). Students' clarity in understanding of the concepts (P < 0.001) and confidence of the ability to solve examination questions (P < 0.05) was higher after synchronous teaching. The examination scores after synchronous online teaching were significantly higher (P = 0.0156) than those for topics covered through asynchronous method.

CONCLUSION

Online teaching, especially the synchronous method, offers an opportunity of continuum of training during crisis situations such as the ongoing novel coronavirus pandemic. The wide availability of internet services and the ever-changing global situation mandates readiness for this modality of teaching, both for the teachers and the students.

The Milan System for Reporting Salivary Gland Cytopathology: An outcome of retrospective application to three years' cytology data of a tertiary care hospital

Objectives:

Fine-needle aspiration cytology (FNAC) of the salivary gland lesions has diverse and sometimes overlapping features that pose a diagnostic challenge for the cytopathologists. The Milan System for Reporting Salivary Gland Cytopathology (MSRSGC) has been introduced to bring uniformity in the reporting of salivary gland FNAC and improve the clinic-pathologic communication resulting in better patient management. The aim of the present study was to assess the application of the MSRSGC on FNAC specimens of salivary gland lesions at a tertiary care hospital.

Material and Methods:

All salivary gland aspiration cytology cases along with histopathology follow-up of salivary gland lesions, wherever available, over a period of 36 months were analyzed and re-categorized according to MSRSGC into six categories and the risk of malignancy (ROM) was computed.

Results:

Of the 123 patients, 23 (18.69%) were classified as non-diagnostic, 39 cases (31.7%) as non-neoplastic, one (0.81%) as atypia of undetermined significance (AUS), benign neoplasm in 49 (39.8%) cases, uncertain malignant potential in two cases (1.63%), suspicious of malignancy in two cases, and malignant in seven cases (5.69%). Out of 123 cases, histopathological correlation was available in 34 cases, for which the ROM was calculated. The ROM was 0% for non-neoplastic, 11.1% for benign neoplasm, and 100% each for salivary neoplasm of uncertain neoplastic potential, and 100% for malignant categories.

Conclusion:

In the present study, the distribution of cases according to MSRSGC was comparable with the previous studies. The proportion of cases classified as AUS was within the goal set by MSRSGC at less than 10%. A risk-based stratification of salivary gland lesions in the form of MSRSGC is essential in the present era to guide and alert the clinician about the subsequent management plan and convey the ROM.

Study of artifacts in thermodynamic and structural properties of Li-Mg alloy in liquid state using linear and exponential models

Temperature-dependent interaction parameters of Redlich-Kister (R–K) polynomials for Li–Mg alloy in liquid phase have been optimized using experimental data in the framework of linear and exponential models. These parameters have then been used to compute the thermodynamic properties (excess Gibbs free energy of mixing, enthalpy of mixing and activity) and structural property (concentration fluctuations in the long-wavelength limit) of the alloy at temperatures 1000 K, 1300 K, 1600 K, 1900 K, and 2200 K. The negative values of excess Gibbs free energy of mixing computed using linear T-dependent parameters increases with the rise in the temperature of the system beyond 1000 K while the same physical quantity computed using the exponential T-dependent interaction parameters decreases with the rise in temperatures and does not show any unusual trends up to 2200 K. Similar behavior has been found in the case of other thermodynamic and structural functions. The unusual behavior that appears in the thermodynamic and structural functions computed using linear T-dependent parameters can be eliminated if these functions are computed using exponential T-dependent parameters.

Middle ear adenoma with neuroendocrine differentiation: Report of a rare case

Middle ear adenoma with neuroendocrine differentiation (MEA-ND) is also called as neuroendocrine adenoma. Neuroendocrine tumors are rarely seen in the head and neck region and are even more rare in the middle ear. Clinical and radiological findings are non-specific and seldom suggest this diagnosis. Nomenclature and behavior of this tumor has been historically controversial. Both epithelial as well as neuroendocrine origin have been suggested. They comprise <2% of all ear tumors and commonly present with unilateral hearing loss, aural fullness, and tinnitus. We present a case report of MEA-ND in a 24-year-old woman who presented with heaviness and tinnitus in the right ear.

Emission characteristics of ultrafine particles from bare and Al2O3 coated graphite for high temperature applications

Owing to its exceptional properties at high temperature, graphite is used in several applications such as structural material and fuel block in high temperature nuclear reactors. Air ingress is one of the serious safety concerns in these reactors. Oxidation of graphite leading to increased porosity affects its mechanical strength and may lead to core collapse resulting in a severe accident. During such a scenario, generation of graphite particles could be the main hazard. Once generated, these particles often in fine and ultrafine sizes, may carry radioactivity to large distances and/or for long times. These particles owing to their higher surface to volume ratio possess an additional inhalation hazard. Ultrafine particles have the potential to enter into respiratory tract and cause damage to body organs. Coating of graphite components is preferred to reduce the oxidation induced damages at high temperatures. In the present work, effect of alumina (Al2O3) coating on the emission characteristics of particles from graphite under high temperature conditions has been investigated. Bare and Al2O3 coated graphite specimens were heated within a closed chamber at varying temperatures during these experiments. Temporal evolution of concentrations of gases (CO and CO2) and particles were measured. The results reveal that Al2O3 coating on the graphite delayed the oxidation behavior and the structure of graphite remained largely intact at high temperatures. A significant reduction in aerosol formation and CO emission was also noticed for the coated specimens.

Incidental detection of microfilaria in cyst fluid of Mucinous cystadenocarcinoma of ovary: A rare case report

INTRODUCTION

Filariasis is a major health problem in certain parts of India. Microfilaria detection on exfoliative and fluid cytology is extremely rare and it is even very rare to find microfilaria coexistent with neoplastic lesions.

PRESENTATION OF CASE

A 45-year-old nulliparous female, who presented with complaints of lower abdominal swelling and pain. Initially, a clinical diagnosis of cystadenoma was made. Ascitic fluid cytology of the patient showed 3-dimensional clusters of cells along with an occasional microfilaria. On histopathology, a diagnosis of Mucinous cystadenocarcinoma of ovary was made.

DISCUSSION

Most common cause of lymphatic filariasis is W. bancrofti followed by Brugia species and it affects young adults. The adult form of the filaria lodge in lymph vessels, and due to lymphatic blockage in neoplasms they appear in tissue fluid or on surface material. It is the first case report of microfilaria being detected in ovarian cystic fluid cytology in a patient of Mucinous cystadenocarcinoma of ovary.

CONCLUSION

Filaria is an incidental finding in most of the cases, hence, cytopathologist should be vigilant and careful screening of all the slides should be done, especially in a country like India, where it is highly endemic.

Interplay of oxidative stress and antioxidant bio markers in oil adjuvant Brucella melitensis vaccinated and challenged mice

The intracellular nature of Brucella leads to rise in oxidative stress due to bacterial invasion, particularly at the site of predilection spleen and lymph nodes. The present study aimed to evaluate the erythrocytic and tissue specific oxidative stress responses induced during oil adjuvant killed Brucella melitensis vaccination. The results of the study clearly implicated a significant increase in level of catalase, and superoxide dismutase (SOD) activity and lipid peroxidation (LPO), and total protein content in erythrocytes after vaccination. The activity of glutathione-S-transferase (GST) was unaltered during the period of experiment. The catalase activity and GSH content was significantly increased in lung and spleen tissues. The tissues GST levels increased significantly in all tissues, while tissue SOD level increased significantly only in lung tissues. Thus, it can be inferred that oil adjuvant based Brucella vaccine induces negligible signs of inflammatory pathophysiology and supports the development of significant level of protection against virulent Brucella challenge.

Nerve Sheath Myxoma of Scalp: A Rare Site of Presentation

Nerve sheath myxoma, a superficial myxoid tumor, was first described in 1969 by Harkin and Reed. Tumor has cytological and histological resemblance with neurothekeoma, another cutaneous myxoid lesion. Nerve sheath myxoma affects individuals of all age groups and equal predilection for both genders with most favored sites being the fingers and knee. Here, we present a case report of nerve sheath myxoma of the scalp, diagnosed and confirmed with histopathology and immunohistochemistry.

Emerging contaminants in a river receiving untreated wastewater from an Indian urban centre

Research over the last decade on emerging trace organic contaminants in aquatic systems has largely focused on sources such as treated wastewaters in high income countries, with relatively few studies relating to wastewater sources of these contaminants in low and middle income countries. We undertook a longitudinal survey of the Ahar River for a number of emerging organic contaminants (including pharmaceuticals, hormones, personal care products and industrial chemicals) which flows through the city of Udaipur, India. Udaipur is a city of approximately 450,000 people with no wastewater treatment occurring at the time of this survey. We found the concentrations of many of the contaminants within the river water were similar to those commonly reported in untreated wastewater in high income countries. For example, concentrations of pharmaceuticals, such as carbamazepine, antibiotics and non-steroidal anti-inflammatory drugs, ranged up to 1900 ng/L. Other organic contaminants, such as steroid estrogens (up to 124 ng/L), steroid androgens (up to 1560 ng/L), benzotriazoles (up to 11 μg/L), DEET (up to 390 ng/L), BPA (up to 300 ng/L) and caffeine (up to 37.5 μg/L), were all similar to previously reported concentrations in wastewaters in high income countries. An assessment of the population densities in the watersheds feeding into the river showed increasing population density of a watershed led to a corresponding downstream increase in the concentrations of the organic contaminants, with quantifiable concentrations still present up to 10 km downstream of the areas directly adjacent to the highest population densities. Overall, this study highlights how a relatively clean river can be contaminated by untreated wastewater released from an urban centre.

Effect of Tris-egg Yolk, Soya Milk, and Liposome-based Extenders on Sahiwal (Bos indicus) Sperm Quality during Pre- and Post-Cryopreservation Stages

BACKGROUND

Even though there are plenty of semen cryopreservation extenders available, their adoption is limited. Although normal tris-based egg yolk (EYC) extender is widely used, it leads to compromised post-thaw sperm quality.

OBJECTIVE

To find a standard semen extender, six different semen extenders were validated.

METHODS

In a split study, six aliquots of zebu cattle fresh semen ejaculate were cryopreserved in extenders containing egg yolk obtained from hen which was reared either in 1) normal, 2) omega-3 enriched, and 3) herbal enriched diet supplementation, and egg yolk free extenders such as 4) soya lecithin, 5) Bioxcell and 6) Optixcell.

RESULT

Significantly poor sperm quality and kinematics were observed in extender containing herbal egg yolk. However, omega-3 enriched egg yolk extender was on par with EYC. Among all extenders, soya lecithin and bioxcell have shown better sperm quality. Sperm motility was significantly higher in semen extended in liposome-based extender Optixcell.

CONCULSION

Optixcell can be considered as a standard extender for cattle semen cryopreservation to maintain adequate sperm quality required for artificial insemination.

Octamer 4 expression and lymph node metastasis in ductal carcinoma of breast: Are they associated?

Purpose: Octamer 4 (Oct-4) is a transcription factor which is required for the self-renewal and pluripotency of embryonic stem cells and germ cells. In this study, we tried to examine the association of expression of Oct-4 with lymph node metastasis in ductal carcinoma of the breast. Methods: The study was conducted on a total of 45 cases of invasive ductal carcinoma of breast, no special type. Oct-4 expression was studied on paraffin-embedded sections by immunohistochemistry. Results: Oct-4 expression was seen in 22.2% of cases. No statistically significant association was found between the expression of Oct-4 and histological type, tumor size, histological grade, and lymph node metastasis. Of Oct-4 positive tumor, 80% of cases showed lymph node metastasis, as compared to 62.85% without Oct-4 expression. However, the association was statistically insignificant. Conclusion: Oct-4 expression can be a promising biomarker of carcinogenesis, metastatic potential, and prognosis of carcinoma breast. However, the study with larger sample size is needed to establish the clinicopathological potential of this biomarker.

Multinodular adult rhabdomyoma in female: A rare case report

Rhabdomyomas are rare benign mesenchymal tumors of striated muscle origin. These are classified as cardiac and extracardiac types. Extracardiac type is further classified as adult, fetal and genital types. Adult rhabdomyoma represents <2% of all muscular tumors. It mostly occurs in adults (median: 60 years). Males are more commonly affected (M:F = 3:1) and usually present as solitary lesion. We report a rare case of multinodular adult rhabdomyoma arising from the floor of the mouth. A 55-year-old female presented with a painless, soft, mobile, nontender and multinodular swelling in the right submandibular region and the floor of the mouth for 2 months. Fine-needle aspiration cytology showed cellular smears of large elongated to round cells with abundant eosinophilic granular cytoplasm, small nuclei and occasionally prominent nucleoli. Histology revealed partially encapsulated lesion showing sheets of large, oval to polygonal cells with abundant deeply eosinophilic and granular cytoplasm, with small peripherally placed nuclei with few cells showing prominent nucleoli. Prominent cytoplasmic vacuolations (periodic acid-Schiff positive) were present. The cells were positive for desmin and myogenin. This case is an extremely rare presentation of multinodular adult rhabdomyoma in a female. The correct identification of this lesion is important to avoid an unnecessarily aggressive resection, yet providing potentially curative therapy.

Failure rate prediction of equipment: can Weibull distribution be applied to automated hematology analyzers?

Background Life cycle prediction measures, that provide information on the probability of failure of equipments, have been applied in electronic and mechanical engineering and for predicting the strength of dental implants. However, the same has not been utilized as yet in medical equipment such as hematology analyzers. Methods Failure data of five automated hematology analyzers (3-part differential) was collected over 14 consecutive months and a Weibull probability plot was made. The scale and shape parameters of this plot were used to predict failure probability distribution. This was then combined with various costs involved in remedial maintenance to get a cost analysis. Results The analyzers in their "useful life" period were found to suffer fewer actual and predicted failures compared to those in the "wear out" phase. Cost analysis showed a considerably higher per month cost of remedial maintenance of analyzers compared to the price of a comprehensive maintenance contract. Conclusions Our study demonstrates, for the first time, that Weibull distribution can be applied well to hematology analyzers for modeling of failure data and the resultant information is helpful in the cost analysis of maintenance to allow for prudent and informed decision making with regards to the mode of maintenance of analyzers.

Ethnic Variations of Blood Groups in a Medical College of Eastern Nepal

Background Red blood cells contain antigens in its membrane which are inherited according to Mendelian law. ABO and Rhesus blood group systems are considered the most important blood group systems for clinical procedures, blood transfusion, organ transplantation, anthropological study and medico-legal purposes. Determination of ABO and Rhesus blood groups and its frequency distribution in a multiethnic country like Nepal is important for effective management of blood banks, safe blood transfusion services. The trend of blood groups and its ethnic distributions in the eastern part of Nepal is still unknown. Objective To find the distribution of blood groups among the subjects of different ethnic groups of eastern Nepal. Method A cross-sectional perspective study was carried out among the subjects visited in the laboratory of Nobel Medical College, Biratnagar, Nepal for a period of one year from August 1, 2015 to July 30, 2016. Result The 11,960 subjects were included in the present study, among which 5012 were males and 6948 were females. The study revealed that in ABO system, blood group distribution was 34.80% O, 28.66% A, 27.66% B and 6.89% AB. With regard to Rh blood group system, Rhesus +ve was 96.79% and Rhesus -ve was 3.21%. O blood group dominant ethnic groups were Brahmin, Bhujel, Biswakarma, Shah, Gurung, Marwari, Magar, Mahato, Mandal, Newar, Sanyasi, Tamang, Terai Brahmin and Yadav. Similarly, blood group A dominant ethnic groups were Chhetri, Dhimal, Limbu, Rai and Muslim. Howerver, blood group B was dominant in ethnic groups, namely Biswakarma, Rajput, Satar and Tharu. Conclusion The frequency distribution pattern of ABO blood group was observed as O > A> B > AB and in Rhesus system, Rhesus +ve > Rhesus -ve. Variation in blood groups distribution was observed in various ethnic groups.

Gastric lavage in babies born through meconium stained amniotic fluid in prevention of early feed intolerance: A randomized controlled trial

OBJECTIVE

To evaluate the efficacy of gastric lavage (GL) in preventing feed intolerance in babies born through Meconium stained amniotic fluid (MSAF).

STUDY DESIGN

In this randomized trial conducted at a tertiary care hospital, neonates born of MSAF after 34 weeks period of gestation requiring routine care were randomly allocated to GL with 10 ml/kg of normal saline. The control group did not receive GL. The subjects were monitored for first 24 hours in predefined time epochs. The primary outcome was incidence of feed intolerance which was defined as vomiting or abdominal distension more than 2 cm from baseline measure. Babies were also monitored for potential adverse events due to GL and total duration of hospital stay.

RESULTS

Baseline parameters were comparable. The incidence of feed intolerance was not significant in the GL group [4.6% vs 9.2%; RR 0.92 (0.29-3)]. There were no adverse events secondary to GL. The duration of hospital stay was comparable between groups.

CONCLUSION

GL in neonates born of MSAF does not reduce feed intolerance.

Quantification of dislocation nucleation stress in TiN through high-resolution in situ indentation experiments and first principles calculations

Through in situ indentation of TiN in a high-resolution transmission electron microscope, the nucleation of full as well as partial dislocations has been observed from {001} and {111} surfaces, respectively. The critical elastic strains associated with the nucleation of the dislocations were analyzed from the recorded atomic displacements, and the nucleation stresses corresponding to the measured critical strains were computed using density functional theory. The resolved shear stress was estimated to be 13.8 GPa for the partial dislocation 1/6 <110> {111} and 6.7 GPa for the full dislocation ½ <110> {110}. Such an approach of quantifying nucleation stresses for defects via in situ high-resolution experiment coupled with density functional theory calculation may be applied to other unit processes.

Evaluation of Effectiveness of Neonatal Resuscitation Programme (NRP) Course Among Paediatric Residents of BPKIHS

Introduction: Neonatal resuscitation is an essential skill for neonatal care providers, especially for junior doctors who are often the first persons to attend to a newborn in need of resuscitation. The Neonatal Resuscitation Programme (NRP) training course offers a comprehensive and systematic training programme that has been adopted in 130 countries worldwide. Reports from different countries attributed the improvements in neonatal mortality and morbidity over the past two decades partly to the implementation of a systematic neonatal resuscitation training programme. The objective of this study was to evaluate the effectiveness of Neonatal Resuscitation Programme (NRP) in improving the knowledge of the paediatric resident doctors after completion of the course.Materials and Methods: This was a cross-sectional interventional study. The resident doctors who attended the NRP course were enrolled. The knowledge was evaluated by written 30-item questionnaire pre- and post- course score. Statistical analysis was done by descriptive statistics and paired t-test. p- value of <0.05 was taken as significant.Results: Data of 18 paediatric residents who attended the course were analyzed. There were four female and 14 male residents. Out of 18 residents, eight were from first year, seven were from second year and three were from third year. Their mean scores (out of 30) were 13.84 (SD 2.57) (pre-course) and 16.68 [(SD 3.15) (post-course) (p=0.001)].Conclusions: NRP course produced a modest gain in residents’ knowledge on neonatal resuscitation at the end of their course. NRP training has the potential to substantially improve knowledge of neonatal resuscitation.J Nepal Paediatr Soc 2015;35(1):18-23

Oral Cancer Care and Oromaxillofacial Surgery

Oral cancers are one of the most common cancers affecting people of Nepal and it the sixth most common cancer in the world. Unlike other cancers the early detection of the disease is possible through a routine examination of the oral cavity which is usually done by a dental practitioner. Through a series of phases like prevention, screening, early intervention, diagnosis and staging, management with tumor ablative surgeries, and rehabilitation to restore the function and esthetic part for better clinical outcome, the role of the specialty of dentistry is immensified. From a patient perspective, having a direct referral line within the dental community between dentists and oral and maxillofacial surgeons will contribute to cost reduction and improvement in outcomes. Trained oral and maxillofacial surgeon especially in the head and neck oncology plays a vital role in exploring functional multidisciplinary efforts to enhance patient care, academic excellence and research initiatives and evaluate for gaps in patient care. This article highlights the role of such professionals in a multidisciplinary team approach for the proper management of head and neck cancers which have significantly and logically additive effect for a better outcome.

Ulcerated primary fibrosarcoma of breast: case report and review of literature

Breast carcinoma is a common condition worldwide but stromal sarcomas of breast are rarity in day to day surgical practice. Out of primary breast sarcomas, fibrosarcoma constitutes only 16% of cases. We report a primary fibrosarcoma of breast in a young female patient which presented as ulcerated growth and fixity to chest wall and multiple ipsilateral axillary lympadenopathy (Stage IIIb). After biopsy confirmation palliation mastectomy was done and patient was sent for chemoradiotherapy.

Acute inhalation toxicity of smoke of fentanyl and its 1-substituted analogs in Swiss albino mice

Fentanyl (N-(1-phenethyl-4-piperidinyl)propionanilide) is a synthetic, potent narcotic analgesic agent. However, it is known to have several side effects, which led to synthesis and evaluation of its new analogs for the management of pain. We have earlier reported the comparative bioassay of fentanyl and its eight 1-substituted analogs (1-8) in mice. Three compounds, viz., N-(1-(2-phenoxyethyl)-4-piperidinyl)propionanilide (2), N-isopropyl-3-(4-(N-phenylpropionamido)piperidin-1-yl)propanamide (5), and N-t-butyl-3-(4-(N-phenylpropionamido)piperidin-1-yl)propanamide (6) were found to be more effective and less toxic compared to fentanyl. The present study reports the comparative acute inhalation toxicity of smoke of fentanyl and its three analogs, viz., 2, 5, and 6 in mice. Animals were exposed to different concentrations of smoke generated by heating the compounds. Exposure was performed in a head only all glass static exposure assembly for 15 min to determine the median lethal concentration (LC50). The breathing pattern and various respiratory parameters of the animals were also monitored online using a polygraph. Out of three compounds tested, analog 5 was found to be most toxic (LC50 = 2820 mg/m3) while 2 was least toxic (LC50 = >8000 mg/m3). All the compounds caused long lasting respiratory depression in a dose-dependent manner, which did not completely resolve even after discontinuation of exposure. Aerodynamic median diameter and geometric standard deviation of smoke particles was determined employing eight-stage Andersen sampler. The particles were found to be within the respirable range. The study, however, concludes that due to possible decomposition of the compounds by heating or its poor absorption by the alveolar surface, the present inhalation technique cannot be employed to generate smoke of fentanyl and its analogs for any medical or surreptitious use.

Biomass fuel use and the exposure of children to particulate air pollution in southern Nepal

The exposure of children to air pollution in low resource settings is believed to be high because of the common use of biomass fuels for cooking. We used microenvironment sampling to estimate the respirable fraction of air pollution (particles with median diameter less than 4 μm) to which 7-9 year old children in southern Nepal were exposed. Sampling was conducted for a total 2649 h in 55 households, 8 schools and 8 outdoor locations of rural Dhanusha. We conducted gravimetric and photometric sampling in a subsample of the children in our study in the locations in which they usually resided (bedroom/living room, kitchen, veranda, in school and outdoors), repeated three times over one year. Using time activity information, a 24-hour time weighted average was modeled for all the children in the study. Approximately two-thirds of homes used biomass fuels, with the remainder mostly using gas. The exposure of children to air pollution was very high. The 24-hour time weighted average over the whole year was 168 μg/m(3). The non-kitchen related samples tended to show approximately double the concentration in winter than spring/autumn, and four times that of the monsoon season. There was no difference between the exposure of boys and girls. Air pollution in rural households was much higher than the World Health Organization and the National Ambient Air Quality Standards for Nepal recommendations for particulate exposure.

Drought stress responses in crops

Among the effects of impending climate change, drought will have a profound impact on crop productivity in the future. Response to drought stress has been studied widely, and the model plant Arabidopsis has guided the studies on crop plants with genome sequence information viz., rice, wheat, maize and sorghum. Since the value of functions of genes, dynamics of pathways and interaction of networks for drought tolerance in plants can only be judged by evidence from field performance, this mini-review provides a research update focussing on the current developments on the response to drought in crop plants. Studies in Arabidopsis provide the basis for interpreting the available information in a systems biology perspective. In particular, the elucidation of the mechanism of drought stress response in crops is considered from evidence-based outputs emerging from recent omic studies in crops.

Increase in flavan-3-ols by silencing flavonol synthase mRNA affects the transcript expression and activity levels of antioxidant enzymes in tobacco

Flavonoids are plant secondary metabolites widespread throughout the plant kingdom involved in many physiological and biochemical functions. Amongst the flavonoids, flavan-3-ols (catechin and epicatechin) are known for their direct free radical scavenging activity in vitro, but studies on their antioxidant potential and interaction with antioxidant enzymes in vivo are lacking. Here, the flavonoid pathway was engineered by silencing a gene encoding flavonol synthase (FLS) in tobacco to direct the flow of metabolites towards production of flavan-3-ols. FLS silencing reduced flavonol content 17-53%, while it increased catechin and epicatechin content 51-93% and 18-27%, respectively. The silenced lines showed a significant increase in expression of genes for dihydroflavonol reductase and anthocyanidin synthase, a downstream gene towards epicatechin production, with no significant change in expression of other genes of the flavonoid pathway. Effects of accumulation of flavan-3-ols in FLS silenced lines on transcript level and activities of antioxidant enzymes were studied. Transcripts of the antioxidant enzymes glutathione reductase (GR), ascorbate peroxidase (APx), and catalase (CAT) increased, while glutathione-S-transferase (GST), decreased in FLS silenced lines. Enhanced activity of all the antioxidant enzymes was observed in silenced tobacco lines. To validate the affect of flavan-3-ols on the antioxidant system, in vitro experiments were conducted with tobacco seedlings exposed to two concentrations of catechin (10  and 50 μm) for 2 days. In vitro exposed seedlings produced similar levels of transcripts and activity of antioxidant enzymes as FLS silenced seedlings. Results suggest that flavan-3-ols (catechin) might be increasing activity of GR, Apx and CAT by elevating their mRNAs levels. Since these enzymes are involved in scavenging of reactive oxygen species, this strategy would help in tailoring crops for enhanced catechin production as well as making them tolerant to oxidative stresses.

In silico targeted genome mining and comparative modelling reveals a putative protein similar to an Arabidopsis drought tolerance DNA binding transcription factor in Chromosome 6 of Sorghum bicolor genome

Arabidopsis Thaliana HARDY (AtHRD) is a gene with an APETELA 2 / Ethylene Responsive Factor (AP2/ERF) domain linked to improved performance under drought in rice. We hypothesized that the sorghum genome could possess a similar gene product and were motivated to conduct a computational genome scale mining for the protein and analyse its structural and functional properties. AtHRD sequence was used as a query to BLAST against the sorghum genome dataset followed by multiple alignment analysis. A homology model of the target was built using a template detected based on the pair-wise comparison of hidden Markov models for alignments. DNA docking with a matrix of homologous interface contacts was done. Functional and structural analysis of the query and target was conducted using various online servers. A High-scoring segment pair from Chromosome 6 of the sorghum genome in the region between 54948120 and 54948668 had 68 amino acid similarities out of the 184 residues and was 1.4% above twilight zone threshold. The homology model showed 86.8% residues in most favoured regions. The target protein which had an AP2/ERF domain when docked with GCC box DNA motif had conserved residues involved in binding; it had a long unstructured region beyond the AP2 domain with several motifs for the recognition of serine/threonine protein kinase group. The protein model showed that it could bind to a GCC box which is present in several drought responsive genes. The presence of possible signalling domains and intrinsic disorder in the target protein suggest that this could play a role in drought tolerance which is an inherent character of sorghum. These results offer a jumpstart for validation experiments which could pave the way for cis/trans genic improvement of a range of crops.

Variation in melatonin receptors (Mel(1a) and Mel(1b)) and androgen receptor (AR) expression in the spleen of a seasonally breeding bird, Perdicula asiatica

Daily variation in the peripheral level of melatonin plays a major role in integrating reproduction and environmental information for seasonally breeding birds. However, the variation in immunity and reproduction has never been assessed in any avian species on a 24 h time scale. Therefore, to understand the relationship between immune function and reproductive phases in a seasonally breeding bird, Perdicula asiatica, the Indian jungle bush quail, we studied the daily variation of melatonin and testosterone levels along with expression of their receptors Mel(1a), Mel(1b), and androgen receptor in the spleen during the reproductively active phase. Immunocytochemistry for the melatonin receptors Mel(1a) and Mel(1b) presented a differential distribution pattern. Western blot of splenic protein suggested a daily rhythm of melatonin receptors, while acrophases for the two melatonin receptors Mel(1a) and Mel(1b) differed by 4 h, suggesting that the expression of the receptors may peak at different times, causing more of either Mel(1a) or Mel(1b) to be available at a particular time to mediate function. The circulatory melatonin level correlated with percentage stimulation ratio of splenocytes and plasma interleukin-2 level, but did not correlate with testosterone or androgen receptor, suggesting that melatonin could be a major hormone imparting a time-of-day effect on the modulation of immune function in a seasonally breeding bird during the reproductively active phase.

Management of intra-vitreal cysticercosis

BACKGROUND

south east Asia is an endemic zone for cysticercosis. Oocular cysticercosis is emerging as a common problem which if untreated can lead to severe visual loss in 3-5 years.

CASES

we describe here a case series of three patients with intravitreal cysticercosis and managed by surgical cyst removal by pars plana vitrectomy.

OBSERVATION

the procedure was successful in all cases to maintain anatomical integrity of the globe with some functional gain of vision.

CONCLUSION

surgical intervention in ocular intravitreal cysticercosis is an acceptable approach with good results.

Genetic architecture, inter-relationship and selection criteria for yield improvement in rice (Oryza sativa L.)

This study has been conducted to determine the extent of genetic association between yield of Rice (Oryza sativa L.) and its components. The present experiment was carried out with 40 Rice (Oryza sativa L.) genotypes which were evaluated in a randomized block design with 3 replications during wet season of 2007 and 2008. Results showed that sufficient amount of variability was found in the entire gene pool for all traits studied. Higher magnitude of genotypic and phenotypic coefficients of variation was recorded for seed yield, harvest index, biological yield, number of spikelets per panicle, flag leaf length, plant height and number of tillers indicates that these characters are least influence by environment. High heritability coupled with high genetic advance as percent of mean was registered for seed yield, harvest index, number of spikelets per panicle, biological yield and flag leaf length, suggesting preponderance of additive gene action in the expression of these characters. Grain yield was significantly and positively associated with harvest index, number of tillers per hill, number of panicle per plant, panicle length, number of spikelet's per panicle and test weight at both genotypic and phenotypic levels. Path coefficient analysis revealed that harvest index, biological yield, number of tillers per hill, panicle length, number of spikelets per panicle, plant height and test weight had direct positive effect on seed yield, indicating these are the main contributors to yield. From this study it may be concluded that harvest index, number of tillers per hill, panicle length and number of spikelet per panicle and test weight are the most important characters that contributed directly to yield. Thus, these characters may serve selection criteria for improving genetic potential of rice.

Brain MR imaging and 1H-MR spectroscopy changes in patients with extrahepatic portal vein obstruction from early childhood to adulthood

BACKGROUND AND PURPOSE

MR imaging and (1)H-MR spectroscopy changes are well reported in cirrhotic patients, whereas they are inadequately reported in EHPVO. The aim of this study was to investigate age-related changes in brain MR imaging and metabolite profile in EHPVO with and without MHE and to explore any correlation of imaging and (1)H-MR spectroscopy parameters with blood ammonia.

MATERIALS AND METHODS

Sixty-three patients with EHPVO (children, 7-12 years [n = 22], adolescents, 13-18 years [n = 15] and adults, 19-41 years [n = 26]) and 47 healthy age/sex-matched volunteers were studied. Neuropsychological tests, MR imaging, (1)H-MR spectroscopy, and blood ammonia estimation were performed in all subjects.

RESULTS

Of 63 EHPVO patients, 25 (40%) who had MHE showed significantly increased MD, Glx, and blood ammonia in all 3 age groups; however, myo-inositol was significantly lower only in adults when compared with controls. MD positively correlated with blood ammonia and Glx in all age groups. Brain choline levels were normal in all patients with different age groups.

CONCLUSIONS

Increases in brain MD, Glx, and blood ammonia were associated with MHE in all age groups. Normal brain choline in EHPVO signifies healthy liver and may serve as a diagnostic marker for its differentiation from cirrhosis-induced encephalopathy. Significant decrease of myo-inositol in adults is probably due to cellular osmoregulation secondary to long-standing hyperammonemia.

Evaluation and optimization of preparative variables for controlled-release floating microspheres of levodopa/carbidopa

Levodopa, a prodrug of dopamine, is the first line drug in the treatment of Parkinson's disease. All current levodopa products are formulated in combination with aromatic amino acid decarboxylase inhibitors such as carbidopa or benserazide to prevent the peripheral metabolism of levodopa. The objective of the present investigation was to produce floating microspheres of carbidopa (CD)/levodopa (LD) to enhance their efficacy by increasing their gastric residence time, which is major technique to improve efficacy of narrow absorption window drugs. The microspheres were prepared by the o/w emulsion-solvent diffusion method using polymers hydroxypropylmethyl cellulose K15 M (HPMC K15 M) and ethyl cellulose (EC). The effects of various formulation and process variables on the particle size, in vitro floating behavior, percent drug entrapment, and in vitro drug release were studied. The size and surface morphology of prepared microspheres were characterized by optical and scanning electron microscopy, respectively. In vitro drug release studies were performed and drug release kinetics was evaluated using the linear regression analysis. The prepared microspheres exhibited prolonged drug release (approximately 10h) and remained buoyant for >12 h. Spherical and smooth-surfaced microspheres with encapsulation efficiency ranging from 43% to 80% were obtained. In vitro studies demonstrated diffusion-controlled drug release from the microspheres.