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Sengendo F, Subramanian S, Chemurot M, Tanga CM, Egonyu JP. Efficient Harvesting of Safe Edible Grasshoppers: Evaluation of Modified Drums and Light-Emitting Diode Bulbs for Harvesting Ruspolia differens (Orthoptera: Tettigoniidae) in Uganda. JOURNAL OF ECONOMIC ENTOMOLOGY 2021; 114:676-683. [PMID: 33704488 DOI: 10.1093/jee/toab025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Indexed: 06/12/2023]
Abstract
Ruspolia differens (Serville) (Orthoptera: Tettigoniidae) is a delicacy in many African countries. It is commonly mass-harvested from the wild using light traps consisting of energy-intensive mercury bulbs which pollute the environment when poorly disposed. The catch is collected using open-ended drums which are inefficient in retaining the insects. The drums also collect nontarget insects including those that produce toxic chemicals (such as pederin) that cause severe burns to human skin. To prevent escape of trapped R. differens, trappers apply potentially hazardous substances like waste cooking oil on the walls of drums. Here, we modified the collection drum by fitting a funnel to retain R. differens; and partitioned it into three compartments with wire meshes of variable sizes to filter nontarget insects. Additionally, we replaced mercury bulbs with light-emitting diode (LED) bulbs which are energy-efficient. We evaluated the performance of the modified R. differens trap (modified drums and LED bulbs) compared to the current collection drums and mercury bulbs. The catch of R. differens in the modified drums was comparable to that of current drums. Nontarget insects were significantly filtered from the catch collected in modified drums compared to the current drums. Further, LED bulbs of 400 W trapped a comparable quantity of R. differens as 400 W mercury bulbs, but with less than half the consumption of electricity compared to the mercury bulbs. We concluded that modified R. differens light traps have better energy-use efficiency and ensure safety to collectors, processors, and consumers.
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Subramanian S, Chavre PP. Marriage and career issues. Indian J Anaesth 2021; 65:87-88. [PMID: 33767513 PMCID: PMC7980241 DOI: 10.4103/ija.ija_1570_20] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2020] [Revised: 12/20/2020] [Accepted: 12/21/2020] [Indexed: 11/24/2022] Open
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Hampton P, Halliday A, Aassi M, Subramanian S, Jain M, Griffiths CEM. Twelve-week secukinumab treatment is consistently efficacious for moderate-to-severe psoriasis regardless of prior biologic and non-biologic systemic treatment: Post hoc analysis of six randomised trials. J Eur Acad Dermatol Venereol 2021; 35:928-937. [PMID: 33030755 PMCID: PMC7986672 DOI: 10.1111/jdv.16982] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Accepted: 09/22/2020] [Indexed: 01/12/2023]
Abstract
Background The efficacy of biologic therapies is greater among biologic‐naïve vs. biologic‐experienced psoriasis patients. However, little is known as to whether prior use of other systemic therapies impacts secukinumab efficacy in patients with moderate‐to‐severe psoriasis. Objective To investigate the impact of prior exposure to systemic therapies upon the efficacy and safety of secukinumab 300 mg for moderate‐to‐severe psoriasis. Methods Post hoc analysis of six randomised controlled trials (RCTs) comparing secukinumab with placebo, ustekinumab or etanercept at 12 weeks of treatment. Data comparing secukinumab with placebo and ustekinumab were meta‐analysed, while comparisons between secukinumab and etanercept were from a single RCT. Four subgroups of patients were assessed: (i) naïve to non‐biologic systemics (NBS) and biologics; (ii) exposed to NBS but naïve to biologics; (iii) naïve to NBS but exposed to biologics; and (iv) exposed to NBS and biologics. Outcomes of interest included the following: investigator’s global assessment (IGA) score, absolute psoriasis area and severity index (PASI) response, PASI 75, PASI 90 and PASI 100 responses, and dermatology life quality index (DLQI). Safety was also assessed. Results One thousand three hundred and eighty‐three patients were included in the secukinumab vs. placebo meta‐analysis: 1776 in the secukinumab vs. ustekinumab meta‐analysis and 653 in the within‐trial analyses of secukinumab vs. etanercept. For all subgroups, secukinumab was significantly more efficacious than placebo for all outcomes measured. Secukinumab generated greater responses in biologic‐naïve patients, while prior NBS had a negligible impact on treatment response. Furthermore, secukinumab was more efficacious than both ustekinumab and etanercept on many outcomes, with an even greater difference for biologic‐naïve than biologic‐exposed patients. Safety results were consistent with individual clinical trial results. Conclusions Twelve‐week treatment with secukinumab 300 mg is consistently more efficacious than placebo, etanercept and ustekinumab in patients with moderate‐to‐severe psoriasis, regardless of prior exposure to biologics or NBS. Secukinumab had a comparable safety profile to both etanercept and ustekinumab.
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Anil AG, Sunil Kumar Naik T, Subramanian S, Ramamurthy PC. A novel non-enzymatic urea sensor based on the nickel complex of a benzimidazoyl pyridine derivative. J Electroanal Chem (Lausanne) 2021. [DOI: 10.1016/j.jelechem.2021.115062] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Ilamurugu A, Chandrasekaran A, Ayyalusamy A, Prasanna Satpathy S, Reddy JM, Arora S, Subramanian S, Velayudham R. Volumetric and dosimetric impact of MRI in delineation of gross tumor volume of non-spinal vertebral metastases treated with stereotactic ablative radiation therapy. Cancer Radiother 2021; 25:135-140. [PMID: 33422419 DOI: 10.1016/j.canrad.2020.06.032] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2019] [Revised: 10/16/2019] [Accepted: 06/16/2020] [Indexed: 12/31/2022]
Abstract
PURPOSE To investigate the Gross Tumor Volumes (GTV) and its dosimetric impact of magnetic resonance imaging (MRI) assisted contouring for non-spinal metastasis treated with stereotactic ablative body radiotherapy (SABR). MATERIAL AND METHODS Five observer contours on CT (GTVCT) and CT+MR (GTVCT+MR) were evaluated against expert team contours (GTVEC) for 14 selected cases. Dice Similarity Index (DSC) and Geographical Miss Index (GMI) quantify observer variation. We also analyze the maximum dose (Dmax) and dose received by 0.35cc (D0.35cc) of the spinal cord (SC) for GTVCT and GTVCT+MR, where optimization parameters and priorities were unchanged. Percent rank function is also evaluated for SC doses. RESULTS The mean DSC and GMI scores for the CT-only dataset are 0.6974 and 0.2851 and for CT+MR dataset is 0.7764 and 0.1907 respectively. Statistically, significant results were found for mean GTV volumes between GTVEC versus GTVCT and GTVCT versus GTVCT+MR (P<0.001). Dosimetric analysis of Dmax and D0.35cc exceeded 84.2% and 88.5% of times its respective threshold doses for CT-only dataset, whereas for the CT+MR dataset, it exceeded only by 18% and 15.7% times. 'Percent rank' function analysis for SC doses also indicates the same. CONCLUSION This study supports MRI fusion for GTV and OAR delineation for non-spinal metastasis. Our study showed that the dosimetric analysis is vital for observer variation studies and the addition of the MR data set is significant to improve the confidence of Stereotactic treatments.
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Rhodes JM, Subramanian S, Laird E, Griffin G, Kenny RA. Perspective: Vitamin D deficiency and COVID-19 severity - plausibly linked by latitude, ethnicity, impacts on cytokines, ACE2 and thrombosis. J Intern Med 2021; 289:97-115. [PMID: 32613681 PMCID: PMC7361294 DOI: 10.1111/joim.13149] [Citation(s) in RCA: 147] [Impact Index Per Article: 49.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/03/2020] [Revised: 06/16/2020] [Accepted: 06/23/2020] [Indexed: 02/06/2023]
Abstract
BACKGROUND SARS-CoV-2 coronavirus infection ranges from asymptomatic through to fatal COVID-19 characterized by a 'cytokine storm' and lung failure. Vitamin D deficiency has been postulated as a determinant of severity. OBJECTIVES To review the evidence relevant to vitamin D and COVID-19. METHODS Narrative review. RESULTS Regression modelling shows that more northerly countries in the Northern Hemisphere are currently (May 2020) showing relatively high COVID-19 mortality, with an estimated 4.4% increase in mortality for each 1 degree latitude north of 28 degrees North (P = 0.031) after adjustment for age of population. This supports a role for ultraviolet B acting via vitamin D synthesis. Factors associated with worse COVID-19 prognosis include old age, ethnicity, male sex, obesity, diabetes and hypertension and these also associate with deficiency of vitamin D or its response. Vitamin D deficiency is also linked to severity of childhood respiratory illness. Experimentally, vitamin D increases the ratio of angiotensin-converting enzyme 2 (ACE2) to ACE, thus increasing angiotensin II hydrolysis and reducing subsequent inflammatory cytokine response to pathogens and lung injury. CONCLUSIONS Substantial evidence supports a link between vitamin D deficiency and COVID-19 severity but it is all indirect. Community-based placebo-controlled trials of vitamin D supplementation may be difficult. Further evidence could come from study of COVID-19 outcomes in large cohorts with information on prescribing data for vitamin D supplementation or assay of serum unbound 25(OH) vitamin D levels. Meanwhile, vitamin D supplementation should be strongly advised for people likely to be deficient.
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Babu G, Bahl A, Bhattacharya GS, Bhowmik KT, Dattatraya PS, Ghadyalpatil N, Karandikar SM, Kulkarni P, Sridharan N, Parikh P, Prabhash K, Raja T, Rajasundaram S, Subramanian S, Talapatra K, Vaid A. Oncology Gold Standard ® practical consensus recommendations for the use of monoclonal antibodies in the management of squamous cell carcinoma of head and neck. South Asian J Cancer 2020; 6:154-160. [PMID: 29404293 PMCID: PMC5763625 DOI: 10.4103/sajc.sajc_181_17] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
We present the 2017 Oncology Gold Standard Practical Consensus Recommendation for use of monoclonal antibodies in the management of advanced squamous cell carcinoma of head neck region.
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Aarthi M, Subramanian S, Krishnan P. Colistin resistance among multidrug resistant gram negative bacteria isolated from cancer patients from Chennai, South India. Int J Infect Dis 2020. [DOI: 10.1016/j.ijid.2020.09.136] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Vellaiyan S, Subramanian S, Ayyalusamy A, Kantapalayem K, Kumar B. Feasibility of Deformed MR Contours in Stereotactic Body Radiotherapy of Liver. Int J Radiat Oncol Biol Phys 2020. [DOI: 10.1016/j.ijrobp.2020.07.2396] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Abstract
The world has continued to change rapidly since the last version of this article was written on May 20, 2020. Yet, as this article goes to press, we are aware of two realities; first, that we cannot perennially chase a moving target, but second, that nothing about the fundamental trends that we have identified appear to have changed. India is firmly in the throes of a vicious pandemic that we can only hope will abate with the development of an effective vaccine. Our plea for the widespread provision of adequate health and medical facilities, adequate protection for the elderly, and transfers to those severely affected by the lockdown are absolutely unchanged in the face of the latest data. In contrast, the brutal enforcement of a lockdown with none of these accompanying measures can only worsen outcomes for the poorest and most vulnerable among the population.
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Zainol N, Subramanian S, Adnan A, Zulkifli N, Zain A, Kassim N, Kamarudin A. The potential source for composite flours as food ingredient from local grown crops. FOOD RESEARCH 2020. [DOI: 10.26656/fr.2017.4(s2).s11] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The market of composite flour is growing as consumer nowadays choosing a healthy diet
as personal preference. The suitability of the composite flour for use as intermediate or
finish food ingredients highly depends on its physicochemical properties and its
nutritional value. In this study, four types of local fruit crops (particularly their seeds)
namely rambutan, cempedak, durian and nangka were dried and ground into powder
form. The physicochemical properties such as bulk density, pH, water absorption capacity
(WAC), oil absorption capacity (OAC), foam stability (FS), foam capacity (FC) as well as
gelatinization properties of these composite flour were studied. Mineral content and heavy
metal analytes were also determined. Results for bulk density from the least to the higher
amount was 0.54±0.00 g/mL, 0.57±0.00 g/mL, 0.58±0.01 g/mL, 0.66±0.00 g/mL ,
0.70±0.00 g/mL and 0.72±0.00 g/mL for rambutan flour, cempedak flour, tapioca flour,
nangka flour, wheat flour and durian flour, respectively. Both cempedak flour and nangka
flour showed the lowest pH value (5.72±0.01, 5.73±0.00), followed by rambutan flour and
durian flour (6.67±0.00, 6.90±0.00) which similar to that tapioca flour and wheat flour
(6.65±0.1, 6.08±0.0), respectively. Rambutan flour, cempedak flour and wheat flours
showed the highest value in% of foam stability meanwhile these composite flours showed
the lowest value in% of foam capacity. Results for water absorption capacity (WAC) and
oil absorption capacity (OAC) in a range of 6% to 42% and 8% to 12% respectively,
however, durian flour obtained the highest value for WAC while the value for OAC was
the lowest. All of the composite flour possesses gelling properties at 13% concentration
except for cempedak flour which completely gels at 20% of concentration. Rambutan
flour showed the highest mineral analyte particularly in Zinc (107.19±0.17) and Copper
(14.22±0.27) followed by nangka flour [Zinc (64.20±0.32) and Copper (10.40±0.12)] and
durian flour [Zinc (52.38±0.42) and Copper (7.97±0.05)]. Level of heavy metal toxicity
was under risk for all types of composite flour.
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Duhlian L, Koramutla MK, Subramanian S, Chamola R, Bhattacharya R. Comparative transcriptomics revealed differential regulation of defense related genes in Brassica juncea leading to successful and unsuccessful infestation by aphid species. Sci Rep 2020; 10:10583. [PMID: 32601289 PMCID: PMC7324606 DOI: 10.1038/s41598-020-66217-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2019] [Accepted: 05/18/2020] [Indexed: 11/09/2022] Open
Abstract
Productivity of Indian mustard (B. juncea), a major oil yielding crop in rapeseed-mustard group is heavily inflicted by mustard aphid, L. erysimi. Mustard aphid, a specialist aphid species on rapeseed-mustard crops, rapidly multiplies and colonizes the plants leading to successful infestation. In contrary, legume specific cowpea aphid, A. craccivora when released on B. juncea plants fails to build up population and thus remains unsuccessful in infestation. In the present study, differential host response of B. juncea to the two aphid species, one being successful insect-pest and the other being unsuccessful on it has been studied based on transcriptome analysis. Differential feeding efficiency of the two aphid species on mustard plants was evident from the amount of secreted honeydews. Leaf-transcriptomes of healthy and infested plants, treated with the two aphid species, were generated by RNA sequencing on Illumina platform and de novo assembly of the quality reads. A comparative assessment of the differentially expressed genes due to treatments revealed a large extent of overlaps as well as distinctness with respect to the set of genes and their direction of regulation. With respect to host-genes related to transcription factors, oxidative homeostasis, defense hormones and secondary metabolites, L. erysimi led to either suppression or limited activation of the transcript levels compared to A. craccivora. Further, a comprehensive view of the DEGs suggested more potential of successful insect-pests towards transcriptional reprogramming of the host. qRT-PCR based validation of randomly selected up- and down-regulated transcripts authenticated the transcriptome data.
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Kiliyanpilakkil VB, Subramanian S. Fracture of femoral component in an Oxford ® unicompartmental knee replacement with displaced posterior fragment: a case report. Ann R Coll Surg Engl 2020; 102:e148-e151. [PMID: 32233923 DOI: 10.1308/rcsann.2020.0064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Femur component fracture is very rare with Oxford® unicompartmental knee replacement. We report a case from the UK with displacement and rotation of the broken femoral component posterior to the peg. Potential predisposing factors include polywear with metal on metal articulation. The patient had excellent results following revision arthroplasty.
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Subramanian S, Boggu PR, Yun J, Jung S. Structure Activity Relationship of 4‐Phenyl‐1‐(1‐Acylindolin‐5‐Ylsulfonyl)Pyrrolidin‐2‐Ones on Anticancer Activity. B KOREAN CHEM SOC 2020. [DOI: 10.1002/bkcs.11995] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Shi G, Subramanian S, Cao Q, Demehri S, Siewerdsen JH, Zbijewski W. Application of a Novel Ultra-High Resolution Multi-Detector CT in Quantitative Imaging of Trabecular Microstructure. PROCEEDINGS OF SPIE--THE INTERNATIONAL SOCIETY FOR OPTICAL ENGINEERING 2020; 11317:113171E. [PMID: 33597792 PMCID: PMC7885907 DOI: 10.1117/12.2552385] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
PURPOSE To evaluate the performance of a novel ultra-high resolution multi-detector CT scanner (Canon Aquilion Precision UHR CT), capable of visualizing ~150 μm details, in quantitative assessment of bone microarchitecture. Compared to conventional CT, the spatial resolution of UHR CT begins to approach the size of the trabeculae. This might enable measurements of microstructural correlates of osteoporosis, osteoarthritis, and other bone disease. METHODS The UHR CT system features a 160-row x-ray detector with 250×250 μm pixels (measured at isocenter) and a custom-designed x-ray source with a 0.4×0.5 mm focal spot. Visualization of high contrast details down to ~150 μm has been achieved on this device, which is now commercially available for clinical use. To evaluate the performance of UHR CT in quantification of bone microstructure, we imaged a variety of human bone samples (including ulna, radius, and vertebrae) embedded in a ~16 cm diameter plastic cylinder and in an anthropomorphic thorax phantom (QRM-Thorax, QRM Gmbh). Helical UHR CT acquisitions (120 kVp tube voltage) were acquired at scan exposures of 375 mAs - 5 mAs. For comparison, the samples were also imaged using a Normal Resolution (NR) mode available on the scanner, involving 500 μm slice thickness, exposure of 50 mAs, and a focal spot of 0.6×1.3 mm. We obtained micro-CT (μCT) of the bone samples at ~28 μm voxel size as a gold-standard reference. Geometric measurements of bone microstructure were performed in 17 regions-of-interests (ROIs) distributed throughout the bones of the phantoms; image registration was used to place the ROIs at corresponding locations in the UHR CT and NR CT. Trabecular thickness Tb.Th, spacing Tb.Sp, and Bone Volume fraction BvTv were obtained. The UHR and NR imaging protocols were compared terms of correlations to μCT and error of trabecular measurements. The effect of dose on trabecular morphometry was also studied for the UHR CT. Furthermore, we evaluated the sensitivity of texture features of trabecular bone (recently proposed as an alternative to geometric indices of microstructure) to imaging protocol. Image texture evaluation was performed using ~150 regions of interest (ROIs) across all bone samples. Three-dimensional Gray Level Co-occurrence Matrix (GLCM) and Gray Level Run Length Matrix (GLRM) features were extracted for each ROI. We analyzed correlation and concordance correlation coefficient (CCC) of the mean ROI values of texture features obtained using the UHR and NR modes. RESULTS UHR CT reconstructions of bone samples clearly demonstrated improved visualization of the trabeculae compared to NR CT. UHR CT achieved substantially better correlations for all three metrics of bone microstructure, in particular for BvTv (correlation coefficient of 0.91 for UHR CT compared to 0.84 for NR CT) and TbSp (correlation of 0.74 for UHR CT and 0.047 for NR CT). The error obtained with UHR CT was generally smaller than that of NR CT. For TbSp, the mean deviation from μCT (averaged across all bone samples) was only ~0.07 for UHR CT, compared to 0.25 for NR CT. Analysis of reproducibility of texture features of trabecular bone between UHR CT and NR CT revealed fair correlations (>0.7) for the majority of GLCM features, but relatively poor CCC (e.g. 0.02 for Energy and 0.04 for Entropy). The magnitude of texture metrics is particularly affected by the enhanced spatial resolution of UHR CT. CONCLUSION The recently introduced UHR CT achieves improved correlation and reduced error in measurements of trabecular bone microstructure compared to conventional resolution CT. Future development of diagnostic strategies based on textural biomarkers derived from UHR CT will need to account for potential sensitivity of texture features to image resolution.
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Usharani NJ, Shringi R, Sanghavi H, Subramanian S, Bhattacharya SS. Role of size, alio-/multi-valency and non-stoichiometry in the synthesis of phase-pure high entropy oxide (Co,Cu,Mg,Na,Ni,Zn)O. Dalton Trans 2020; 49:7123-7132. [DOI: 10.1039/d0dt00958j] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Presence of multivalency/non-stoichiometry to accommodate a different-sized cation and maintaining electroneutrality were identified as the critical criteria for single-phase formation in multicomponent/high entropy systems.
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Kalatova D, Subramanian S, Luliak M, Gulasova M, Jancovic M, Prochazkova K, Hupkova I, Otrubova J, Libova L, Katunska M, Popovicova M, Topolska A, Sramkova M, Hofbauerova B, Murgova A, Kimuli D. Psychosocial and Medical Intervention before Emergency Travel in Humanitarian Workers – How early is not too late? CLINICAL SOCIAL WORK AND HEALTH INTERVENTION 2019. [DOI: 10.22359/cswhi_10_4_05] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Subramanian S, Brehler M, Cao Q, Quevedo Gonzalez FJ, Breighner RE, Carrino JA, Wright T, Yorkston J, Siewerdsen JH, Zbijewski W. Quantitative Evaluation of Bone Microstructure using High-Resolution Extremity Cone-Beam CT with a CMOS Detector. PROCEEDINGS OF SPIE--THE INTERNATIONAL SOCIETY FOR OPTICAL ENGINEERING 2019; 10953. [PMID: 31814656 DOI: 10.1117/12.2515504] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Purpose A high-resolution cone-beam CT (CBCT) system for extremity imaging has been developed using a custom complementary metal-oxide-semiconductor (CMOS) x-ray detector. The system has spatial resolution capability beyond that of recently introduced clinical orthopedic CBCT. We evaluate performance of this new scanner in quantifying trabecular microstructure in subchondral bone of the knee. Methods The high-resolution scanner uses the same mechanical platform as the commercially available Carestream OnSight 3D extremity CBCT, but replaces the conventional amorphous silicon flat-panel detector (a-Si:H FPD with 0.137 mm pixels and a ~0.7 mm thick scintillator) with a Dalsa Xineos3030 CMOS detector (0.1 mm pixels and a custom 0.4 mm scintillator). The CMOS system demonstrates ~40% improved spatial resolution (FWHM of a ~0.1 mm tungsten wire) and ~4× faster scan time than FPD-based extremity CBCT (FPD-CBCT). To investigate potential benefits of this enhanced spatial resolution in quantitative assessment of bone microstructure, 26 trabecular core samples were obtained from four cadaveric tibias and imaged using FPD-CBCT (75 μm voxels), CMOS-CBCT (75 μm voxels), and reference micro-CT (μCT, 15 μm voxels). CBCT bone segmentations were obtained using local Bernsen's thresholding combined with global histogram-based pre-thresholding; μCT segmentation involved Otsu's method. Measurements of trabecular thickness (Tb.Th), spacing (Tb.Sp), number (Tb.N) and bone volume (BV/TV) were performed in registered regions of interest in the segmented CBCT and μCT reconstructions. Results CMOS-CBCT achieved noticeably improved delineation of trabecular detail compared to FPD-CBCT. Correlations with reference μCT for metrics of bone microstructure were better for CMOS-CBCT than FPD-CBCT, in particular for Tb.Th (increase in Pearson correlation from 0.84 with FPD-CBCT to 0.96 with CMOS-CBCT) and Tb.Sp (increase from 0.80 to 0.85). This improved quantitative performance of CMOS-CBCT is accompanied by a reduction in scan time, from ~60 sec for a clinical high resolution protocol on FPD-CBCT to ~17 sec for CMOS-CBCT. Conclusion The CMOS-based extremity CBCT prototype achieves improved performance in quantification of bone microstructure, while retaining other diagnostic capabilities of its FPD-based precursor, including weight-bearing imaging. The new system offers a promising platform for quantitative imaging of skeletal health in osteoporosis and osteoarthritis.
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Kumar Chandel R, M. Nebapure S, Sharma M, Subramanian S, Srivastava C, Paul Khurana S. INSECTICIDAL AND REPELLENT ACTIVITIES OF EUCALYPTUS OIL AGAINST LESSER GRAIN BORER RHYZOPERTHA DOMINICA (FABRICIUS). JOURNAL OF MICROBIOLOGY, BIOTECHNOLOGY AND FOOD SCIENCES 2019. [DOI: 10.15414/jmbfs.2019/20.9.3.525-529] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Lesser grain borer Rhyzopertha dominica (F.) is a destructive insect pest of stored grains. Both larvae and adults of the pest attack whole, sound grain and cause extensive damage. Larvae are internal feeders whereas adults are free living and bore into the commodity and can fly. Fumigation is the most useful and effective method to manage this insect pest. There are several insecticides available in the market to manage this pest but some insecticides have been banned because of environmental pollutions and for some insecticides this insect pest has developed resistance. Therefore efforts are required to find safe, effective and viable alternatives. Natural products are well known to have a range of useful biological properties against insect pests. Recently, there has been considerable interest in essential oils and extracts of medicinal and edible plant and herbs for the development of alternative insecticides and fumigants. This research was initiated to evaluate the fumigation toxicity and repellent action of Eucalyptus globulus Labill essential oil against adults of R. dominica. GC/MS analysis showed the major components of E. globulus essential oil as 1,8-cineole (22.35%), α-pinene (12.58%) limonene (4.01%), aristolene (3.35%), p-cymene (3.25%), trans-verbenol (3.02%), isosativene (2.85%), α-myrcene (2.15%) and terpinen-4-ol (2.10%). Fumigation toxicity and repellent activity showed that as the concentration and exposure time increased the mortality and repellency also increased. Maximum repellency of 62.0% was observed at 0.32μl/cm2 concentration after 36 hours of exposure.
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Prabhakaran DC, Bolaños-Benitez V, Sivry Y, Gelabert A, Riotte J, Subramanian S. Mechanistic studies on the bioremediation of Cr(VI) using Sphingopyxis macrogoltabida SUK2c, a Cr(VI) tolerant bacterial isolate. Biochem Eng J 2019. [DOI: 10.1016/j.bej.2019.107292] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Rajesh A, Mangamma G, Sairam T, Subramanian S. Probing host-guest interactions in hydroxyapatite intercalated graphene oxide nanocomposite: NMR and scanning probe microscopy studies. Chem Phys Lett 2019. [DOI: 10.1016/j.cplett.2019.136636] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Straub P, Tanga C, Osuga I, Windisch W, Subramanian S. Experimental feeding studies with crickets and locusts on the use of feed mixtures composed of storable feed materials commonly used in livestock production. Anim Feed Sci Technol 2019. [DOI: 10.1016/j.anifeedsci.2019.114215] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Subramanian S. The Emergence of Principal–Agent– Principal Model in India: The Case of Infosys Ltd. IIM KOZHIKODE SOCIETY & MANAGEMENT REVIEW 2019. [DOI: 10.1177/2277975219836536] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Sebastian S, Myers S, Nadir S, Subramanian S. Systematic Review: Efficacy and Safety of Accelerated Induction Regimes in Infliximab Rescue Therapy for Hospitalized Patients with Acute Severe Colitis. Dig Dis Sci 2019; 64:1119-1128. [PMID: 30535888 DOI: 10.1007/s10620-018-5407-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/16/2018] [Accepted: 11/29/2018] [Indexed: 12/13/2022]
Abstract
BACKGROUND Pharmacokinetic data suggest that standard induction dosing schedules may not be sufficient in patients with acute severe colitis (ASUC). Hence, intensified induction regimes are increasingly used in the rescue treatment of hospitalized patients with ASUC to avoid the need for colectomy although the evidence for this is uncertain. AIM To conduct a systematic review of short- and long-term efficacy outcomes from accelerated infliximab induction studies. METHODS Systematic search of relevant databases (MEDLINE, EMBASE, Cochrane Database of Systematic Reviews) and relevant conference proceedings (Digestive Diseases Week, European Colitis and Crohn's Organisation Congress, United European Gastroenterology Week) was done. RESULTS We identified ten relevant studies with a total of 705 patients, of whom 308 received an intensified infliximab regime. Pooled analysis showed no difference in short-term or long-term colectomy rates in those receiving accelerated induction regimes when compared to standard induction. No significant differences in complication rates were identified. CONCLUSIONS The available uncontrolled studies so far do not suggest short-term or long-term benefit in using accelerated induction in hospitalized ASUC. The overall poor quality of available studies with confounding variables indicates the need for a randomized controlled trial with personalized risk stratification.
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Sood R, Paul J, Rajan S, Subramanian S, Balasubramanian D, Iyer S. PO-076 Predictors of postoperative pneumonia in patient undergoing oral cancer resection and its management. Radiother Oncol 2019. [DOI: 10.1016/s0167-8140(19)30242-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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