Efficient Air Desulfurization Catalysts Derived from Pig Manure Liquefaction Char

Biochar from the liquefaction of pig manure was used as a precursor of H2S desulfurization adsorbents. In its inorganic matter, it contains marked quantities of calcium, magnesium and iron, which are known as hydrogen sulfide oxidation catalysts. The char was used either as-received or mixed with 10% nanographite. The latter was added to increase both the content of the carbon phase and conductivity. ZnCl2 in two different ratios of char to an activation agent (1:1 and 1:2) was used to create the porosity in the carbon phase. The content of the later was between 18–45%. The activated samples adsorbed 144 mg/g H2S. Sulfur was the predominant product of reactive adsorption. Its deposition in the pore system and blockage of the most active pores ceased the materials’ activity. The presence of the catalytic phase was necessary but not sufficient to guarantee good performance. The developed porosity, which can store oxidation products in the resulting composite, is essential for the good performance of the desulfurization process. The surface of the composite with nanographite showed the highest catalytic activity, similar to that of the commercial Midas® carbon catalyst. The results obtained indicate that a high quality reactive adsorbent/catalyst for H2S removal can be obtained from pig manure liquefaction wastes

Limited palmar fasciectomy for bilateral Dupuytren’s contracture

Dupuytren’s disease is a fibro-proliferative condition affecting the palmar and digital fascia. This disease is very common in Northern Europe but in India it uncommon as there are only a few cases reported, hence also called as ‘Viking Disease’. Surgical fasciectomy is the standard surgical treatment of choice for Dupuytren’s disease. Complications following surgery are high but there is no definitive cure for Dupuytren disease (DD), and recurrence of finger contractures after treatment is common

Camptodactyly correction: A report of two cases

Camptodactyly is a condition where there is a permanent flexion contracture at the proximal interphalangeal joint mostly involving the little finger. This condition has a varied presentation and hence treatment is controversial, whether conservative management or surgical correction. Here, we present two cases of camptodactyly that were managed with surgery

Tuberculosis tenosynovitis of the wrist: a rare case report

Tuberculosis (TB) is a common disease of the Asian continent and has a varied presentation. Involvement of the musculoskeletal system is uncommon and presents in 10% of extrapulmonary tuberculosis. The atypical sites of tuberculous infection are the spine (51%) pelvis (12%), hip and femur (10%), knee and tibia (10%), and ribs (7%), but involvement of the wrist is rare. Tuberculosis tenosynovitis is a rare site of extra-articular TB. Delayed diagnosis and hence treatment is because it mimics many other disease processes and as a result, complications are common. Median nerve compression leading to carpal tunnel syndrome may also occur in these patients. Here, we present a case of tuberculous tenosynovitis involving the wrist flexors and the radial and ulnar bursae treated with surgery

Nano-biotechnology in tumour and cancerous disease: A perspective review

In recent years, drug manufacturers and researchers have begun to consider the nanobiotechnology approach to improve the drug delivery system for tumour and cancer diseases. In this article, we review current strategies to improve tumour and cancer drug delivery, which mainly focuses on sustaining biocompatibility, biodistribution, and active targeting. The conventional therapy using cornerstone drugs such as fludarabine, cisplatin etoposide, and paclitaxel has its own challenges especially not being able to discriminate between tumour versus normal cells which eventually led to toxicity and side effects in the patients. In contrast to the conventional approach, nanoparticle-based drug delivery provides target-specific delivery and controlled release of the drug, which provides a better therapeutic window for treatment options by focusing on the eradication of diseased cells via active targeting and sparing normal cells via passive targeting. Additionally, treatment of tumours associated with the brain is hampered by the impermeability of the blood–brain barriers to the drugs, which eventually led to poor survival in the patients. Nanoparticle-based therapy offers superior delivery of drugs to the target by breaching the blood–brain barriers. Herein, we provide an overview of the properties of nanoparticles that are crucial for nanotechnology applications. We address the potential future applications of nanobiotechnology targeting specific or desired areas. In particular, the use of nanomaterials, biostructures, and drug delivery methods for the targeted treatment of tumours and cancer are explored.Agencia Canaria de Investigación, Innovación y Sociedad de la Información (ACIISI) del Gobierno de Canarias, Grant/Award Number: Project ProID2020010134; Fundación CajaCanarias, Grant/Award Number: Project 2019SP43; State Plan for Scientific, Technical Research and Innovation 2021–2023 from the Spanish Ministry of Science and Innovation, Grant/Award Number: ProjectPLEC2022-009507Peer reviewe

Perspective of electrospun nanofibers in energy and environment

This review summarizes the recent developments of electrospun semiconducting metal oxide/polymer composite nanostructures in energy and environment related applications. Electrospinning technique has the advantage of synthesizing nanostructures with larger surface to volume ratio, higher crystallinity with phase purity and tunable morphologies like nanofibers, nanowires, nanoflowers and nanorods. The electrospun nanostructures have exhibited unique electrical, optical and catalytic properties than the bulk counter parts as well as nanomaterials synthesized through other approaches. These nanostructures have improved diffusion and interaction of molecules, transfer of electrons along the matrix and catalytic properties with further surface modification and functionalization with combination of metals and metal oxides

Primary lumbar hernia: A rarely encountered hernia

Introduction: Lumbar hernia is an uncommon abdominal wall hernia, making its diagnosis and management a challenge to the treating surgeon. Presentation may be misleading and diagnosis often missed. An imaging study forms an indispensable aid in the diagnosis and surgery is the only treatment option. Presentation of case: A 42 year old male presented with history of pain in lower back of 4 years duration and was being treated symptomatically over 4 years with analgesics and physiotherapy. He had noticed a swelling over the left side of his mid-back and consequently on examination was found to have a primary acquired lumbar hernia arising from the deep superior lumbar triangle of Grynfelt. Diagnosis was confirmed by Computed Tomographic imaging. Discussion: A lumbar hernia may be primary or secondary with only about 300 cases of primary lumbar hernia reported in literature. Lumbar hernias manifest through two possible defects in the posterior abdominal wall, the superior being more common. Management remains surgical with various techniques emerging over the years. The patient at our center underwent an open sublay mesh repair with excellent outcome. Conclusion: A surgeon may encounter a primary lumbar hernia perhaps once in his lifetime making it an interesting surgical challenge. Sound anatomical knowledge and adequate imaging are indispensable. Inspite of advances in minimally invasive surgery, it cannot be universally applied to patients with lumbar hernia and management requires a more tailored approach

Effects of Dental Operating Microscope on Anxiety, Behaviour, and Treatment duration among Children in the 5-7 Year Age Group undergoing dental restorative procedures: A Randomised Clinical Trial

Introduction: Fear of the unknown causes anxiety in paediatric patients. The use of tell-show-do, along with audiovisual distraction, promotes positive behaviour and reduces anxiety. The use of a Dental Operating Microscope (DOM) as a visual distraction aid provides better cooperation in paediatric patients. Aim: To evaluate the effects of a DOM on anxiety, behaviour, and treatment time during a restorative procedure in paediatric dental patients. Materials and Methods: The present study was a parallel-arm, randomised clinical trial conducted at IGIDS, Puducherry, India, in 2022, over a period of four months. Healthy five to sevenyear-old children on their first dental visit were selected (n=90) and divided into two groups using simple randomisation. Group A: Restoration of teeth without a DOM, and group B: Restoration of teeth using a DOM. Anxiety and behaviour were measured as soon as the child entered the operatory (T1), after tell-show-do for the procedure (T2), after cavity preparation (T3), and after completion of the restoration (T4). Caries removal efficacy and treatment duration were also assessed. The data obtained were statistically analysed using the Chi-square test and independent sample t-test (p<0.05). Results: Out of the 90 children who participated in the study, 47 (52%) were girls, and 43 (47%) were boys. There was a decrease in anxiety and improved patient behaviour during cavity preparation (T3) and after completion of restoration (T4) in group B (p<0.001). The operator also reported higher visual (71.10%) and tactile (95.60%) scores in caries removal, with a shorter treatment duration in groups where DOM was used (p<0.001). Conclusion: The use of DOM reduced anxiety levels and improved the compliance of children during dental procedures. Operator ergonomics and the quality of treatment could be enhanced by recommending DOM in regular paediatric dental practice

Enhanced super-hydrophobic and switching behavior of ZnO nanostructured surfaces prepared by simple solution - Immersion successive ionic layer adsorption and reaction process

10.1016/j.jcis.2011.07.015Journal of Colloid and Interface Science363151-58JCIS

Electrospun NiO nanofibers as high performance anode material for Li-ion batteries

10.1016/j.jpowsour.2012.11.050Journal of Power Sources227284-290JPSO