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Experimental analysis of a two-cell passive direct methanol fuel cell stack
Muralikrishna Boni,Surapaneni Srinivasa Rao,Golagani Naga Srinivasulu 한국화학공학회 2022 Korean Journal of Chemical Engineering Vol.39 No.1
Passive direct methanol fuel cells (DMFC) are applicable for charging portable electronic devices. In passive DMFC, fuel and oxidants are supplied through diffusion and natural convection process. The present experimental work analyzed the effect of the membrane electrode assembly (MEA) activation, methanol concentration, bolt tightening torque and stability of the fuel cell stack. Newly fabricated MEA were activated for different time durations of 0, 6, 12 and 18 hrs at 1M of methanol concentration with a constant load. The concentration of methanol varied from 1M to 6M and also bolt torque varied from 4N-m to 8N-m. Further, open circuit voltage (OCV) and voltage stability with respect to time were analyzed. From the results, it is observed that the fuel cell performance was enhanced from 1M to 5M and then decreased. From 0-12 hrs, the cell performance increased with respect to time and then continued the same performance at the 18th hr. From the results, it is also observed that increased bolt torque from 4N-m to 7N-m enhanced the fuel cell performance and then decreased. The fuel cell performance was analyzed in terms of maximum power density and maximum current density.
Yunhai Ma,Thiruventhan Karunakaran,Vishnu Priya Veeraraghavan,Surapaneni Krishna Mohan,Shuling Li 한국생물공학회 2019 Biotechnology and Bioprocess Engineering Vol.24 No.4
Thyroid cancer is the most widespread endocrine malignant cancer and its worldwide occurrence rates are swiftly mounting more pressure in the research institutions. Even though the transience of thyroid cancer is comparatively short, its rate of reappearance is moderately elevated, which is a major cause of the incurable disease of the thyroid gland. Consequently, we used natural component which restrains the cancer cell growth by amending precise molecular mechanisms. In this current study, we assessed sesame, which is a very active substance that inhibits cell proliferation by modulation of JAK/STAT-3 signaling in thyroid cancer cell lines (FTC-133). Results showed that sesame triggers cytotoxicity, ROS production and apoptosis in FTC-133 cell lines by time-dependent approach. Furthermore, Signal Transducer and Activating Transcription (STAT-3) is a novel oncogenic transcriptional factor which normalizes apoptosis and proliferation. The reticence of STAT-3 transcription was measured as an innovative approach to hamper thyroid cancer cell growth. In this current study, we established that sesame deactivates STAT-3 translocation, thereby reducing the elevated expression of, cyclin-D1, Bcl-2 and diminished expression of Bax, caspase-9 and 3 in FTC-133 cell lines. Conclusively, sesame hampers thyroid cell expansion and initiates apoptosis by hindering STAT-3 translocation.
Chejerla Mohan Kumar Varma,Patil Kalmeshwer Gouda,Surapaneni Saikumar,Vinay Shenoy,Halagappa Eshwarappa,Sarla Neelamraju 한국작물학회 2012 Journal of crop science and biotechnology Vol.15 No.3
Wild species of the genus Oryza are a good source of beneficial alleles for enhancing rice yield under normal and adverse conditions. BC2F3 population was derived from a cross between Oryza sativa IR58025B and Oryza meridionalis Ng. (2n = 24, AA) a heat tolerant wild species to evaluate 12 yield traits under irrigated and aerobic conditions. Analysis of variance and genetic estimates indicated there is substantial genetic variation among progenies under both conditions. Grain yield had high heritability (61.9%) and genetic advance (36.4%) under irrigated conditions but moderate heritability (49.6%) and genetic advance (13.3%) under aerobic conditions indicating that selection for yield will be effective under both conditions. Panicle number, grain number, spikelet fertility,and test weight showed significant positive correlation with grain yield under both conditions. Families out-performing IR58025B for yield under both conditions were obtained providing evidence that phenotypically inferior O. meridionalis contributed to yield increase. This species can be a novel source of natural genetic variation for the improvement of rice under irrigated as well as under aerobic condition
Sudhir K Dutta,Sandeep Verma,Vardhmaan Jain,Balarama K Surapaneni,Rakesh Vinayek,Laila Phillips,Padmanabhan P Nair 대한소화기 기능성질환∙운동학회 2019 Journal of Neurogastroenterology and Motility (JNM Vol.25 No.3
2 decades evidence has emerged to suggest that inflammation-derived oxidative damage and cytokine induced toxicity may play asignificant role in the neuronal damage associated with Parkinson’s disease (PD). Presence of pro-inflammatory cytokines and T cellinfiltration has been observed in the brain parenchyma of patients with PD. Furthermore, evidence for inflammatory changes hasbeen reported in the enteric nervous system, the vagus nerve branches and glial cells. The presence of α-synuclein deposits in thepost-mortem brain biopsy in patients with PD has further substantiated the role of inflammation in PD. It has been suggested thatthe α-synuclein misfolding might begin in the gut and spread “prion like” via the vagus nerve into lower brainstem and ultimately tothe midbrain; this is known as the Braak hypothesis. It is noteworthy that the presence of gastrointestinal symptoms (constipation,dysphagia, and hypersalivation), altered gut microbiota and leaky gut have been observed in PD patients several years prior to theclinical onset of the disease. These clinical observations have been supported by in vitro studies in mice as well, demonstrating the roleof genetic (α-synuclein overexpression) and environmental (gut dysbiosis) factors in the pathogenesis of PD. The restoration of the gutmicrobiome in patients with PD may alter the clinical progression of PD and this alteration can be accomplished by carefully designedstudies using customized probiotics and fecal microbiota transplantation.
Varma, Chejerla Mohan Kumar,Gouda, Patil Kalmeshwer,Saikumar, Surapaneni,Shenoy, Vinay,Shashidhar, Halagappa Eshwarappa,Neelamraju, Sarla 한국작물학회 2012 Journal of crop science and biotechnology Vol.15 No.3
Wild species of the genus Oryza are a good source of beneficial alleles for enhancing rice yield under normal and adverse conditions. $Bc_2F_3$ population was derived from a cross between Oryza sativa IR58025B and Oryza meridionalis Ng. (2n = 24, AA) a heat tolerant wild species to evaluate 12 yield traits under irrigated and aerobic conditions. Analysis of variance and genetic estimates indicated there is substantial genetic variation among progenies under both conditions. Grain yield had high heritability (61.9%) and genetic advance (36.4%) under irrigated conditions but moderate heritability (49.6%) and genetic advance (13.3%) under aerobic conditions indicating that selection for yield will be effective under both conditions. Panicle number, grain number, spikelet fertility, and test weight showed significant positive correlation with grain yield under both conditions. Families out-performing IR58025B for yield under both conditions were obtained providing evidence that phenotypically inferior O. meridionalis contributed to yield increase. This species can be a novel source of natural genetic variation for the improvement of rice under irrigated as well as under aerobic condition.