FREQUENCY OF OCULAR SYMPTOMS IN COVID-19 PATIENTS

Objective: To determine the frequency of ocular symptoms in COVID 19 patients and its association with systemic symptoms in active COVID 19 patients.   Methods: This is a cross sectional observational study of laboratory confirmed COVID-19 patients who were admitted in isolation wards for a period from Dec 16, 2020 to Jan 15, 2021. A structured form was used to extract the data from electronic medical records. Data collected included sociodemographic characteristics, presenting symptoms, systemic signs and symptoms, ocular symptoms, past medical history, RT-PCR and chest radiographic findings.  Results: A total of 44 patients (30 (68.2%) males and 14 (31.82%) females) were admitted to the isolation wards during the study period. The mean age (+ SD) age was 55.75 + 14.53 with median range 57.50 (14-92). Age <30 years i.e. 4.5%, 30-50 i.e. 27.3% and >50 i.e. 68.2%.Ocular symptoms were present in 17 patients (38.6%).   Conclusion:  We conclude from our study that Ocular symptoms were present in 17 patients (38.6%) out of 44 (Total number of patients) However, these symptoms were mild, had no fixed pattern of occurrence, neither associated with the severity of the systemic disease nor associated with any serious ocular outcome

Impact of genetically modified crops on rhizosphere microorganisms and processes:A review focusing on Bt cotton

In recent years, the cultivation of genetically modified (GM) crops has become a topic of great interest, due in part to the considerable public controversy, which exists concerning their potential benefits or adverse effects. Since the development of the first GM crop about 25 years ago, a diverse range of new cultivars have been released into the environment which were developed by employing advanced molecular techniques to introduce new beneficial genes from a wide variety of sources. While GM crops have great potential for enhancing agricultural production, their potential impacts on soil biota are only partially understood and information on their long-term impact on soil biota is scant. Several recent studies have indicated that GM crops may cause changes in both the invertebrate and microorganism soil biota associated with these crops, with some laboratory-based experiments even revealing transfer of genes from GM plants to native soil bacteria. However, processes such as gene transfer and stable inheritance to subsequent generations remain unproven in natural soil systems. In addition, although significant research efforts have recently been directed towards understanding the effects of GM crops on soil biota, the wide variation in the scientific observations has often hindered an accurate understanding of the issues. Thus, this review collated and synthesized all available information on the microbiological and biochemical effects of GM crops on soil biota with a special focus on GM Bt-cotton. The review also addressed the key issues associated with the use of GM crops including herbicide resistance, transgene flow and explored the plausibility of horizontal gene transfer in soil

Architecture for parallel PV strings using the switched-capacitor-based differential power processing technique

Mismatch effects are common in photovoltaic (PV) systems, which affect the overall system performance and the PV module life. A mismatch causes an imbalance in the PV module voltages, and therefore, it is not recommended to connect PV modules in parallel due to increased power losses and stresses. To mitigate the effect of mismatch, module-level power electronics converters are considered as an effective solution. Accordingly, this paper introduces a differential power processing (DPP) converter based on switched-capacitors (SCs) for parallel-connected PV strings. The proposed DPP converters are connected across each PV module, which equalizes the PV module voltages. The technique can help to generate more output power regardless of mismatch between PV modules and make the parallelization of PV strings possible. The proposed architecture is analyzed through simulations and compared with parallel-connected PV strings using Schottky diodes.</p

Thiamine supplementation for the treatment of heart failure: A review of the literature

A systematic review of the literature was performed by searching Pubmed and EMBASE databases using the terms "thiamine," "vitamin B1," "heart failure," "systolic dysfunction," "ventricular dysfunction," "cardiomyopathy," "ventricular failure," and "systolic failure." Relevant trials and articles were evaluated pertaining to thiamine deficiency in patients with heart failure (HF) and references were searched for further inclusion of articles. A total of 20 articles were reviewed and summarized in detail. While more research is needed to fully elucidate the clinical thiamine deficiency in HF patients, recent evidence has indicated that supplementing with thiamine in HF patients has the potential to improve left ventricular ejection fraction. Thiamine deficiency appears to be not uncommon in patients with HF, and supplementation with thiamine has been shown to improve cardiac function, urine output, weight loss, and signs and symptoms of HF. Therefore, this simple therapy should be tested in large-scale randomized clinical trial to further determine the effects of thiamine in HF patients

Optimal aspirin dose in acute coronary syndromes: An emerging consensus

Numerous clinical trials testing the efficacy of aspirin for the secondary prevention of cardiovascular disease have been published. We reviewed the literature pertaining to aspirin dose in acute coronary syndrome patients. Clinical trials assessing the comparative efficacy of different doses of aspirin are scarce. This complex antiplatelet therapy landscape makes it difficult to identify the best aspirin dose for optimizing efficacy and minimizing risk of adverse events, while complying with the various guidelines and recommendations. Despite this fact, current evidence suggests that aspirin doses of 75-100 mg/day may offer the optimal benefit:risk ratio in acute coronary syndrome patients

Sustainable applications of rice feedstock in agro-environmental and construction sectors: A global perspective

Rice is second only to maize among the world's most important cereal crops, with a global harvested area of approximately 158 million hectares and an annual production of more than 700 million tonnes as paddy rice. At this scale, rice production generates vast amounts of waste in the form of straw, husk, and bran. Because of high cellulose, lignin, and silica contents, rice biowaste (RB) can be used to produce rice biochar (RBC) and rice compost (RC). Furthermore, RB can be used as sorbents, soil conditioners, bricks/concrete blocks, flat steel products, and biofuels, all of which make significant contributions to meeting United Nations Sustainable Development Goals (UNSDGs). Although previous reviews have explored individual applications of rice feedstocks, inadequate attention has been paid to multifunctional values and potential multi-utilities. Here, we offer a comprehensive review of RBC and RC with respect to: (1) preparation and characterization; (2) applications as soil conditioners and organic fertilizers and their effects on soil-carbon sequestration; (3) remediation of toxic element–contaminated soils and water; (4) removal of colors, dyes, endocrine-disrupting chemicals, personal-care products, and residual pesticides from water; and (5) applications in the construction industry. Specifically, we describe the opportunities for the sustainable use of RBC and RC in the management of contaminated soils and water as well as the construction industry. Overall, this review is expected to lengthen the list of possible multifunctional applications of RBC and RC. © 2021 Elsevier Lt

Pros and Cons of Biochar to Soil Potentially Toxic Element Mobilization and Phytoavailability: Environmental Implications

While the potential of biochar (BC) to immobilize potentially toxic elements (PTEs) in contaminated soils has been studied and reviewed, no review has focused on the potential use of BC for enhancing the phytoremediation efficacy of PTE-contaminated soils. Consequently, the overarching purpose in this study is to critically review the effects of BC on the mobilization, phytoextraction, phytostabilization, and bioremediation of PTEs in contaminated soils. Potential mechanisms of the interactions between BC and PTEs in soils are also reviewed in detail. We discuss the promises and challenges of various approaches, including potential environmental implications, of BC application to PTE-contaminated soils. The properties of BC (e.g., surface functional groups, mineral content, ionic content, and π-electrons) govern its impact on the (im)mobilization of PTEs, which is complex and highly element-specific. This review demonstrates the contrary effects of BC on PTE mobilization and highlights possible opportunities for using BC as a mobilizing agent for enhancing phytoremediation of PTEs-contaminated soils. © 2022, The Author(s)