645 research outputs found
Magnetic order at coherent oxide interfaces
No full textGrenzflächen zwischen Perovskitoxiden haben in den letzten zehn Jahren enormes Interesse geweckt, da sie mehrere neuartige Aspekte wie zum Beispiel Grenzflächenkopplung und unterschiedliche magnetische Ordnung aufweisen. Daher präsentiert diese Arbeit eine Untersuchung der neuartigen strukturellen und magnetischen Ordnung an kohärenten Oxidgrenzflächen, insbesondere in La0.7A0.3MnO3/SrRuO3 (A = Sr oder Ca) und La0.7Ca0.3MnO3 / SrTiO3 Heterostrukturen. La0.7A0.3MnO3/SrRuO3 war wegen der ungewöhnlich starken antiferromagnetischen Kopplung an den Grenzflächen zwischen ferromagnetischen Manganit- und Ruthenatschichten von besonderem Interesse. Die strukturellen Aspekte umfassen die elastische Dehnung und für die La0.7Sr0.3MnO3/ SrRuO3-Grenzfläche die atomare Terminationsebene der Perovskit-artigen Schichten an der Grenzfläche. Die elastische Spannung wurde statisch durch Wachstum der Filme auf verschiedenen Substraten oder dynamisch durch Verwendung eines piezoelektrischen Substrats kontrolliert.Interfaces between perovskite oxides have garnered enormous interest in the last decade by featuring several novel aspects such as interfacial coupling, different magnetic order and so on. Therefore, this thesis presents a study of novel structural and magnetic order at coherent oxide interfaces, particularly in La0.7A0.3MnO3/SrRuO3(A=Sr or Ca) and La0.7Ca0.3MnO3/SrTiO3 heterostructures. La0.7A0.3MnO3/SrRuO3 has been of particular interest because of the unusually strong antiferromagnetic coupling at the interfaces between ferromagnetic manganite and ruthenate layers. The structural aspects include elastic strain and, for the La0.7Sr0.3MnO3/SrRuO3interface, the atomic termination plane of the perovskite-type layers at the interface. Elastic strain has been controlled statically through growing the films on different substrates or dynamically by using a piezoelectric substrate.vorgelegt von Sujit Da
On some commensal anomuran and brachyuran crabs (Crustacea: Decapoda) off Visakhapatnam, Northwestern Bay of Bengal
No full textSilambarasan, Krishnan, Kar, Annada Bhusan, Prasad, Gummadi Venkata Ankineedu, Pattnayak, Sujit Kumar, Das, Pratyush, Reddy, Dwarampudi Bhami, Ramalingam, Lakshmana Perumal (2023): On some commensal anomuran and brachyuran crabs (Crustacea: Decapoda) off Visakhapatnam, Northwestern Bay of Bengal. Zootaxa 5325 (4): 541-555, DOI: 10.11646/zootaxa.5325.4.5, URL: http://dx.doi.org/10.11646/zootaxa.5325.4.
Constructing indicators from patent specifications: What they reveal and what they imply?
No full textThe study distinguishes some of the rich sources of information that can be extracted from a patent document and can act as an indicator to measure some of the technological features of patenting activity of a firm/country. The paper attempts to highlight this through empirical examination of patents granted to Indian institutions in the US. The applicability of the indicators that are distinguished and meaning they can convey are addressed in this study
FIGURE 4 in On some commensal anomuran and brachyuran crabs (Crustacea: Decapoda) off Visakhapatnam, Northwestern Bay of Bengal
No full textFIGURE 4. Brachyura associated with cnidarians collected from northwestern Bay of Bengal: A, Quadrella maculosa Alcock, 1898; B, Quadrella coronata Dana, 1852; C, Sphenomerides trapezioides (Wood-Mason in Wood-Mason & Alcock, 1891); D, Dorippoides facchino (Herbst, 1785).Published as part of Silambarasan, Krishnan, Kar, Annada Bhusan, Prasad, Gummadi Venkata Ankineedu, Pattnayak, Sujit Kumar, Das, Pratyush, Reddy, Dwarampudi Bhami & Ramalingam, Lakshmana Perumal, 2023, On some commensal anomuran and brachyuran crabs (Crustacea: Decapoda) off Visakhapatnam, Northwestern Bay of Bengal, pp. 541-555 in Zootaxa 5325 (4) on page 549, DOI: 10.11646/zootaxa.5325.4.5, http://zenodo.org/record/824371
Shield ulcer: A very rare presentation
No full textShield ulcer is a severe form of vernal keratoconjunctivitis (VKC). Shield ulcer is an uncommon, incapacitating corneal manifestation that occurs in 3%–11% of patients suffering from VKC. Patients might present with intense itching, sensitivity to light, and “ropy” discharge from the eyes. Shield ulcer, as a rare complication of VKC, should always be kept in mind for patients suffering from vernal conjunctivitis
Recurrence-free pterygium surgery with special surgical technique
No full textAim: The aim of this study was to evaluate and analyze the surgical outcome of suture-free, glue-free limbal conjunctival autograft after pterygium excision. Design: This was a prospective, interventional, and hospital-based study. Materials and Methods: Forty eyes of 40 patients with primary pterygium were graded, and excision was performed by the single surgeon. To prevent recurrence-free LCAG was used with special surgical technique “subconjunctival resection of fibrovascular pteygium and cauterization of limbal base to destroy abnormal limbal cells along with resection of 7-mm pteygium.” In this technique, we used patient's own blood as a bioadhesive. The eye was patched for 24 h postoperatively. Patients were treated with topical eye drop prednisolone acetate (1%) 1 drop six times per day with gradual tapering every week, eye drop moxifloxacin (0.5%) 1 drop four times per day, eye drop nepafanac (0.5%) 1 drop four times per day, eye drop carboxymethyl cellulose 1 drop six times per day, and carboxymethyl gel at night for 6 weeks. The outcomes were assessed regarding any recurrence, complication(s), and operative time at each follow-up visit on day 1, day 7, day 30, 3 months, 6 months, and 1 year. Results: There were 30 males (75%) and 10 females (25%). The mean age of all the patients was −51.15 (51.15 ± 10.3 years), range 51–60 years. Cosmetic reason was the chief indication of surgery (11 eyes, 27.5%), followed by recurrent redness (nine eyes, 22.5%). There was no recurrence, and the most common complication was hemorrhagic graft (18 eyes, 45%). All grafts appear indistinguishable by 3 months and were free of symptoms. Average surgical time was 18 ± 2 min. Conclusion: (1) 8-mm LCAG with subconjunctival resection of fibrovascular pteygium and cauterization of limbal base to destroy abnormal limbal cells are very affecting in preventing recurrences. (2) Using patient's own blood as bioadhesive is associated with less postoperative discomfort, less postoperative time, and less complications
Sixth nerve palsy - Window to a dreaded brain tumor in children (pontine glioma)
No full textPontine glioma is a rare tumor and exclusively occurs in children. It originates from the glial (connective/supporting) cells of the brain. In children, they are the leading cause of deaths from brain tumors. The usual age of presentation is later half of first decade. Most of the children die within 18 months of diagnosis. It mostly affects 6th and 7th cranial nerves along with hearing defect
Anterior orbital cysticercosis: A case presentation
No full textOne of the most important parasites which frequently cause blindness in humans is the cysticercus cellulosae. Cysticercus cellulosae, the larval form of the pork tapeworm Taenia solium, is the causative organism of cysticercosis, in which humans are the intermediate hosts in the life cycle. Cysticercus cellulosae may become encysted in various bodily tissues, usually the eyes, central nervous system, and subcutaneous tissues. An immunologic reaction with fairly intense inflammatory signs and symptoms may be produced, and the surrounding structures may be compressed. Acquired strabismus, diplopia, recurrent redness, and painful proptosis are some of the clinical signs in patients with orbital cysticercosis. Diagnosis of cysticercosis is based mainly on orbital imaging because of its highly specific appearance. Medical therapy is the main stay of treatment. Cysticercosis is the infestation by cysticercus cellulosae, the larval form of the pork tapeworm, T. solium. It is contracted by ingestion of the infective cysticerci in under cooked pork; ingestion of eggs of T. solium in contaminated water, food, or vegetables; and regurgitation of eggs from the small intestine. The sites for predilection for the development of cysticerci are the central nervous system, subcutaneous tissue, skeletal muscle, heart muscle, and the eye
Traumatic optic neuropathy: Surgical intervention improves vision and color perception
No full textThe most common cause of traumatic optic neuropathy (TON) is indirect injury to the optic nerve, which is thought to be the result of transmitted shock from an orbital impact to the intracanalicular portion of optic nerve. Direct TON can result from penetrating injury or from bony fragments in the optic canal or orbit piercing the optic nerve. Orbital hemorrhage and optic nerve sheath hematoma can also cause TON by direct compression. There may be optic nerve avulsion and transection also. Trauma to the optic nerve rarely improves vision with best of the management. The diagnosis of TON is made clinically based on history and ophthalmic signs along with neurological investigations. The management of indirect optic nerve injury is controversial. Experimental studies of optic nerve injury have employed Corticosteroid Randomization After Significant Head injury study, National Acute Spinal Cord Injury Study (NASCIS 2 and 3) and optic canal depression surgery. Most of the therapeutic regimens have been extrapolated from the NASCIS II, which showed a statistically significant improvement in neurologic outcome (motor and sensory) in a subgroup analysis of acute spinal cord injury patients receiving a methylprednisolone 30 mg/kg bolus within 8 h of injury, followed by 5.4 mg/kg/h for 23 h, but sometimes have high death rates and other complications. Based on the studies, good results can be obtained if interventions are made within 8 h of incident and observation thereafter
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