Mathematically optimized production, purification and characterization of penicillin G acylase from soil bacterial isolates AA17A and AA17B

260-268This research article deals with production of industrial enzyme penicillin G acylase from soil bacterial isolates namely AA17A and AA17B, which are selected from 80 soil samples. The strains were selected based on qualitative (turbidity) and quantitative (HPLC) test for 6-aminopenicillanic acid (6APA) production. The enzyme was assayed for its activity and optimized for production of enzyme using design of experiments software (DOE) “Design Expert 8.0.7.1”. Optimization of enzyme production of four carbon sources (glucose, glycerol, sucrose and starch), four nitrogen sources (beef extract, tryptone, peptone and yeast extract), for temperature (25°C, 30°C, 35°C and 40°C), four pH (6, 7, 8, 9), four inoculum volumes (2.5 ml, 5.0 ml, 7.5 ml, 10.0 ml) and the phenyl acetic acid (PAA) level  (0.15%, 0.17%, 0.185%, 0.2%). The penicillin acylase activity was enhanced to 1.2 fold under following optimized culture conditions: carbon source - glucose (8%), nitrogen source - beef extract (2%), pH 9.0, temperature 30ºC, phenyl acetic acid 0.185%, inoculum volume 5 ml. Approximately 1.22-fold purification from the initial culture broth was achieved during ammonium sulphate precipitation (70-80%) with a yield of 4.6% enzyme. The specific activity of the final partially purified enzyme was 13.73 IU/mg protein

Comparison of two palliative regimens of radiation on the quality of life in metastatic non small cell lung cancer

Background: Lung cancer is one of the most common cancers in males worldwide and its number is increasing every year. Of these cases 75-80% case are of non-small cell type. Methods: This study was conducted on 30 patients of stage IV non-small cell lung cancer in the department of radiation oncology at tertiary care center, Shimla, Himachal Pradesh India from 1st Jun 2019 to 30th Jun 2020 by dividing them into study and control arm for assessing quality of life (QOL) with EORTC QLQ-C30 version3.0. Results: We observed significant improvement in Global health scale of control arm (p=0.005) but it got worse in study arm (p=0.743). All the parameters of Functional scale i.e. Physical (p=0.584; 0.170), Role (p=0.213; 0.016), Emotional (p=0.239; 0.002), Cognitive (p=0.793; 0.247) and Social functioning (p=0.030; 0.231) got worse in study arm while they improved in control arm. As far as Symptom scale is concerned, in the study arm; dyspnea (p=0.724), appetite (p=0.836), constipation (0.192), diarrhea (p=0.341) improved but other symptoms like fatigue (p=0.566), nausea (p=0.347), pain (p=0.305), insomnia (p=0.025), financial difficulties (p=0.082) got worse while in control arm; fatigue (p=0.003), pain (p=0.000), dyspnea (p=0.022), insomnia (p=0.336), appetite (p=0.028), constipation (0.019), diarrhea (p=0.336), financial difficulties (p=0.336) improved and nausea (p=0.120) got worse. Conclusion: QOL assessment by the physician before commencement of the treatment and later on at every visit seems to be beneficial for symptom relief and to allay the anxiety of both patient and their attendants

Addition of temozolamide as radiosensitizer in brain metastasis: experience from a resource limited centre in sub-Himalayan region

Background: Brain metastasis is a common, debilitating and undesirable neurological complication of systemic cancer and a significant cause of morbidity and mortality. Methods: 39 patients of brain metastasis with Ca breast/Ca lung as primaries were randomized into a study arm and control arm in between 1st August 2018 to 31st July 2019 at IGMC Shimla. Control arm consisted of WBRT (30 GY/10 fractions/5 days a week). Study arm consisted of WBRT with same dose and temozolamide administered 75mg /m2/day during RT days. Results: Out of 39 patients 34 patients completed treatment out of which 17 in study and 17 in control arm. Response to brain lesions could not be assessed in 20 out of 39 patients. In remaining 19 patients 36.8% patients in study arm and 20% patients in control arm had partial response (PR). 5.3% patient in study arm and none in control arm has complete response (CR). 25% patients in control arm and 15.8% patients in study arm had stable disease. Improvement in QOL (FACT- G) seen in both study and control arm post Rx, however improvement sustained in study arm at 1st F/u. Conclusions: Leveraging the additional radio-sensitizing effect of TMZ may hold promise as an attractive strategy to enhance the quality of life in patients with a favourable performance status. Moreover, RPA could serve as a decisive factor in tailoring the treatment approach, guiding the choice between palliative radiotherapy and best supportive care for these individuals

1st Workshop on Maritime Computer Vision (MaCVi) 2023: Challenge Results

The 1$^{\text{st}}$ Workshop on Maritime Computer Vision (MaCVi) 2023 focused on maritime computer vision for Unmanned Aerial Vehicles (UAV) and Unmanned Surface Vehicle (USV), and organized several subchallenges in this domain: (i) UAV-based Maritime Object Detection, (ii) UAV-based Maritime Object Tracking, (iii) USV-based Maritime Obstacle Segmentation and (iv) USV-based Maritime Obstacle Detection. The subchallenges were based on the SeaDronesSee and MODS benchmarks. This report summarizes the main findings of the individual subchallenges and introduces a new benchmark, called SeaDronesSee Object Detection v2, which extends the previous benchmark by including more classes and footage. We provide statistical and qualitative analyses, and assess trends in the best-performing methodologies of over 130 submissions. The methods are summarized in the appendix. The datasets, evaluation code and the leaderboard are publicly available at https://seadronessee.cs.uni-tuebingen.de/macvi.Comment: MaCVi 2023 was part of WACV 2023. This report (38 pages) discusses the competition as part of MaCV

Optimization of enzymatic saccharification of microwave pretreated sugarcane tops through response surface methodology for biofuel

992-996The optimization of biomass loading enzyme loading, surfactant concentration and incubation time, using response surface methodology (RSM) and Box Behnken design for enzymatic saccharification of sugarcane tops (SCT) for maximum recovery of fermentable sugars using crude cellulases, resulted in 90.24% saccharification efficiency. Maximum saccharification yield of 0.376 g/g glucose as substrate for ethanol production was observed at optimal conditions of 10% biomass loading (pretreated), 100FPU/g of cellulase loading, 0.04% (w/w) surfactant concentration and 72 h of incubation time

<span style="font-size:15.0pt;mso-bidi-font-size:12.0pt" lang="EN-GB">Mathematical model-based optimization of physico-enzymatic hydrolysis of <i style="mso-bidi-font-style:normal">Pinus roxburghii </i>needles for the production of reducing sugars </span>

944-953The objective of this study was to optimize the physico-enzymatic pretreatment of <i style="mso-bidi-font-style: normal">P.roxburghii fallen foliage (needles) to produce reducing sugars through response surface methodology (RSM) with central composite face centered design (CCD). Under this, five parameters, i.e., concentration of laccase, cellulose and xylanase, steam explosion pressure and incubation period, at three levels with twenty six runs were taken into account. Cellulase, xylanase and laccase enzymes with activity 4.563, 38.32 and 0.05 IU/mL, respectively, were produced from locally isolated microbial strains. The analysis of variance (ANOVA) was applied for the validation of the predicted model at 95% of confidence level. This model predicted 334 mg/g release of reducing sugars on treating P.roxburghii fallen foliage with 1.18 mL of cellulose, 0.31 mL of xylanase and 0.01 mL of laccase, 14.39 psi steam explosion pressure and 24 h of incubation time. The experimental results obtained were in good agreement to predicted values, making it a reliable optimized model for five factors in combination to predict reducing sugar yield for ethanol production for bio-fuel industry. </span

Development of a microbial consortium for production of blend of enzymes for hydrolysis of agricultural wastes into sugars

585-590This study presents development of a blend of enzymes capable of degrading lignocellulosic biomass from a locally isolated microbial consortium through solid state fermentation. Different agro wastes (wheat bran, rice husk and pine needles) were taken in all combinations as a substrate and at 1:1:1 ratio, optimum production of blend of enzymes was obtained with 0.673 U/ml, 0.214 U/ml and 0.032 U/ml activities respectively after 3 days of incubation at 37°C. This blend of enzyme hydrolysed pine waste and released 0.454 g/g of sugar at 37°C at 120 rpm for 48 h. Produced blend of enzymes was found very potent and can have great application in biofuel, phytochemical and other industries

Prospective randomized trial to compare the outcome and tolerability of delivering the same total dose of radiation in 61/2 weeks versus 51/2 weeks time in head and neck cancers

Background: Concurrent chemoradiation is currently considered to be the standard of care in the treatment of head and neck cancer. In developing countries like ours, a good number of patients cannot tolerate chemoradiation because of the poor general condition and financial constraints. Those patients are treated with radiation alone. The optimum radiotherapy (RT) schedule for best local control and acceptable toxicity is not yet clear. We aimed to find out whether shortening of treatment time using six instead of five RT fractions per week improves the locoregional control in squamous cell carcinoma of head and neck. Materials and Methods: We conducted a prospective randomized study for a period of 2 years from September 2007 to August 2009 in 109 untreated patients of squamous cell carcinoma of head and neck with histologically confirmed diagnosis and no evidence of distant metastasis. Study group (55 patients) received accelerated RT with 6 fractions per week (66 Gy/33#/51/2 weeks). Control group (54 patients) received conventional RT with 5 fractions per week (66 Gy/33#/61/2 weeks). Tumor control, survival, acute and late toxicities were assessed. Results: At a median follow-up of 43 months, 29 patients (52.7%) in the 6 fractions group and 24 patients (44.4%) in the 5 fractions group were disease-free (P = 0.852). The benefit of shortening was higher for advanced disease control though it was not statistically significant. Grade 3 and 4 skin toxicity was significantly higher in the accelerated RT (70.9%) arm as compared to conventional (35.1%) arm (P = 0.04). Grade 3 mucositis was significantly higher in the accelerated RT arm (32.7% vs. 16.6%; P = 0.041). Those acute toxicities were managed conservatively. There was no difference in late toxicities between the two arms. Conclusion: Use of 6 fractions per week instead of 5 fractions per week is feasible, tolerable, and results in a better outcome in the patients of head and neck cancers

Synthesis of well–dispersed silver nanorods of different aspect ratios and their antimicrobial properties against gram positive and negative bacterial strains

In the present contribution, we describe the synthesis of highly dispersed silver nanorods (NRs) of different aspect ratios using a chemical route. The shape and size of the synthesized NRs were characterized by Transmission Electron Microscopy (TEM) and UV-visible spectroscopy. Longitudinal and transverse absorptions bands confirm the rod type structure. The experimentally recorded UV-visible spectra of NRs solutions were fitted by using an expression of the extinction coefficient for rod like nano structures under the dipole approximation. Simulated and experimentally observed UV-visible spectra were compared to determine the aspect ratios (R) of NRs. The average values of R for NR1, NR2 and NR3 solutions are estimated to be 3.0 ± 0.1, 1.8 ± 0.1 and 1.2 ± 0.1, respectively. These values are in good agreement with those obtained by TEM micrographs. The silver NRs of known aspect ratios are used to study antimicrobial activities against B. subtilis (gram positive) and E. coli (gram negative) microbes. We observed that the NRs of intermediate aspect ratio (R = 1.8) have greater antimicrobial effect against both, B. subtilis (gram positive) and E. coli (gram negative). The NRs of aspect ratio, R = 3.0 has better antimicrobial activities against gram positive than on the gram negative