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Guduru Venkat Rao,Partha Pal,Anuradha Sekaran,Pradeep Rebala,Manu Tandan,D. Nageshwar Reddy 대한장연구학회 2023 Intestinal Research Vol.21 No.2
After oncologic resection, histological grading and staging of the tumor give important prognostic information about the future risk of recurrence and hence influence the subsequent management plan. Several studies and their meta-analysis have shown that various histological features (e.g., microscopic positive resection margins, plexitis, granuloma, mesenteric inflammatory activity) can predict postoperative clinical/endoscopic/surgical recurrence after resection in Crohn’s disease (CD). Inclusion of mesentery in surgical resection specimens has been shown to reduce surgical recurrence after ileocolonic resection in CD. However, there is no uniform histopathological staging system for risk stratification in postoperative CD to systematically predict postoperative recurrence. This is because the prediction to date is based on clinical characteristics (smoking status, disease phenotype, surgical history). Histopathological predictors are still not adopted in routine clinical practice due to the lack of a uniform staging system, heterogeneity of published studies and lack of standardized definition of histological features. In this article, we attempted to incorporate all such histological features in a single histological staging system CNM (Crohn’s primary site [resection margin positivity, plexitis, granuloma, depth of infiltration], nodes [presence of granuloma], mesentery [involved or not]) in surgical resection specimen in CD. The proposed CNM classification would help to enable systematic reporting, design future clinical trials, stratify postoperative recurrence risk and choose appropriate postoperative prophylaxis.
Multi-band Conduction Behaviour at the Interface of LaAlO3/SrTiO3 Heterostructures
Veerendra K. Guduru,A. McCollam,J. C. Maan,U. Zeitler,S. Wenderich,M. K. Kruize,A. Brinkman,M. Huijben,G. Koster,D. H. A. Blank,G. Rijnders,H. Hilgenkamp 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.63 No.3
We have measured the Hall resistance and magneto-resistance (MR) of LaAlO3/SrTiO3 heterojunctionsat magnetic fields up to 30 T in a temperature range T = 4 K to 70 K. For temperaturebelow 7 K and above 50 K the devices display linear Hall resistance, indicating that one typeof charge carriers dominate the transport. For temperatures between 10 K and 40 K, the Hallresistance is strongly non-linear, and is accompanied by a large positive MR, which is governedby the component of magnetic field normal to the interface. This behaviour in the intermediatetemperature regime can be related to thermally activated high-mobility carriers.
Vertically aligned Cu-ZnO nanorod arrays for water splitting applications
Babu, Eadi Sunil,Rani, B. Jansi,Ravi, G.,Yuvakkumar, R.,Guduru, Ramesh K.,Ravichandran, S.,Ameen, Faud,Kim, Sungjin,Jeon, Heung Woo Elsevier 2018 Materials letters Vol.222 No.-
<P><B>Abstract</B></P> <P>Vertically aligned Cu-ZnO nanorod arrays were grown using thermal deposition method. Optimum Cu-ZnO and morphology tailoring effect was investigated. Enhanced photoelectrochemical (PEC) activity (0.92 ± 0.2 mA/cm<SUP>2</SUP>) and high photon conversion efficiency (PCE) (0.3490 ± 0.2%) was observed for 5 wt% Cu-ZnO. Cu optimum dopant with ZnO lattice is a promising PEC candidate for water splitting applications.</P> <P><B>Highlights</B></P> <P> <UL> <LI> One step synthesis was adapted to grow vertically aligned nanorod arrays. </LI> <LI> Enhanced photoelectrochemical (PEC) performance of 0.349 ± 0.2% was achieved. </LI> <LI> Highest photon conversion efficiency (PCE) of 0.349 ± 0.2% was achieved. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Zinc oxide nanotips growth by controlling vapor deposition on substrates
Babu, Eadi Sunil,Saravanakumar, B.,Ravi, G.,Yuvakkumar, R.,Ganesh, V.,Guduru, Ramesh K.,Kim, Sungjin Springer-Verlag 2018 Journal of materials science Materials in electron Vol.29 No.8
<P>ZnO nanotips structure fabrication was undertaken through controlled growth by chemical vapor deposition (CVD) method. Substrate position and deposition time role was investigated systematically by controlling the parameters such as temperature, flow rate, and growth pressure. The obtained result showed that ZnO nanorods undergo a sharp regrowth process with increase in ZnO vapor availability in the CVD reactor. The surface morphology and structural properties were investigated by using field-emission scanning electron microscopy and X-ray diffraction (XRD) techniques. The grown nanostructures were used for gas sensor fabrication to detect and to study the sensitivity effects of H-2 and CO.</P>
Novel NiWO<sub>4</sub> nanoberries morphology effect on photoelectrochemical properties
Babu, Eadi Sunil,Rani, B. Jansi,Ravi, G.,Yuvakkumar, R.,Guduru, Ramesh K.,Ganesh, V.,Kim, Sungjin Elsevier 2018 Materials letters Vol.220 No.-
<P><B>Abstract</B></P> <P>We report a novel method to synthesis NiWO<SUB>4</SUB> nanoberries and their morphology dependent photoelectrochemical properties. XRD result revealed monoclinic wolframite NiWO<SUB>4</SUB> structure formation. FESEM and TEM showed average particle and nanoberries size of 4 and 50 nm respectively. Raman active stretching W–O vibration mode at 889 cm<SUP>−1</SUP>, PL blue green emission of intrinsic WO<SUB>6</SUB> <SUP>6−</SUP> complex with double emission center (3T<SUB>1u</SUB>-1A<SUB>1g</SUB>) and FTIR spectrum confirmed NiWO<SUB>4</SUB> formation with a calculated band gap of 2.86 eV. The much higher photocurrent of 0.03 mA/cm<SUP>2</SUP> was obtained at 0 V potential under visible light due to higher band gap (2.86 eV) of nanoberries morphology which led to efficient light absorption and increase in electron and hole separations.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Novel synthesis of NiWO<SUB>4</SUB> nanoberries morphology. </LI> <LI> Higher photocurrent of 0.03 mA/cm<SUP>2</SUP> due to higher band gap 2.86 eV. </LI> <LI> Nanoberries morphology led to absorption, increase electron hole separations. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>Graphical abstract clearly shows the schematic representation of nanoberries formation which is evident that the effect of surfactant for the formation of a big berry contains number of small berries.</P> <P>[DISPLAY OMISSION]</P>
Acquired Movement Disorders Secondary to Giant Tumefactive Perivascular Spaces
Anthony J. Donigian,David Neil Toupin,Donita Lightner,Zain Guduru 대한파킨슨병및이상운동질환학회 2021 Journal Of Movement Disorders Vol.14 No.3
A 17-year-old man with a history of congenital hypothyroidism presented with chronic, nonprogressive left upper extremity shaking and dysconjugate gaze with compensatory tilt since the age of 11 years. On examination, he had vertical nystagmus, saccadic upward gaze, left hyperopia with skew deviation and trace bilateral papilledema. Initial MRI revealed a 4 cm multicystic lesion in the left midbrain that extended into the thalamus and partially obstructed the third ventricle, causing dilatation of the third ventricle with mild lateral ventricular dilatation