OJS [Pandawa Inst.]
Not a member yet
75 research outputs found
Sort by
Therapeutic Properties of Green Tea: A Review
No full textThe most consumed beverage in the world is tea after water. Till today the consumption of black tea is 70% while that of green tea is only 20%. One reason for this percentage is lack of awareness about green tea and invested research. Green tea along with caffeine which imparts characteristic taste, bitterness and stimulating effect, is also rich in a group of chemicals, called catechin polyphenols (commonly known as tannins, which contribute to bitter taste and astringency) and deliver antioxidant properties. Furthermore, green tea also comprises of amino acids such as Theanine along with alkaloids such as adenine, dimethylxanthine, theobromine, theophylline, and xanthine. Some vitamins, like vitamin A, vitamin B1, vitamin B2, vitamin B3, vitamin C and vitamin E are also found in green tea. The present review gives the study of various constituents of green tea and their impact on human health. Studies provide strong evidence that owing to antioxidant properties daily intake of green tea may be used as a preventive measure for different types of cancer and other diseases. This review gives a detailed analysis of constituents of green tea and highlighting it's potential as a natural nutraceutical. However, although much of the documented literature mentions positive effect yet much had to be explored on correlation between concentration of green tea and toxicity
Removal of Toxic Cations from Aqueous Solutions using Ginger Root Waste
No full textRecently, the harmful impact of toxic metals in the aquatic environment cannot be over emphasized again. This work investigated the potential application of ginger root waste (GRW) to remove toxic cations (Cd2+ and Pb2+) from the aqueous medium. Batch adsorption examination was carried out as a function of sorbent dose, initial metal ion concentration, contact time, and temperature. The sorption equilibrium of the metal ions onto the GRW was subjected to Langmuir, Freundlich, Elovich and Redlich-Peterson isotherm models over concentration ranges of 10-50 mg/L. Sorption information was used for kinetic and thermodynamic modeling. The GRW materials before and after sorption was characterized using FTIR and SEM. Results showed higher removal percentage of Cd2+ over Pb2+ ions in all the factors studied. The Redlich – Peterson isotherm model affirmed that sorption of Cd2+ and Pb2+ occurred in a heterogenous surface of the sorbent which is strongly influenced by multiple micropores and caves. Kinetic studies revealed that the sorption was controlled through intra-particle diffusion model aided by surface and chemical reactions. Meanwhile, thermodynamic parameters indicated that the Cd2+ and Pb2+ sorption process was endothermic, however, non-spontaneous at temperature of 303 and 313 K. The FTIR and SEM data showed the evidence of successful sorption of the toxic cations on to the sorbent material
The Impact of COVID-19 on Oral Cancer Diagnosis: A Systematic Review
No full textThe Coronavirus-19 pandemic has led to severe collapses in international health systems that have repercussions at all levels of disease prevention. Oral squamous cell carcinoma (OSCC) is the most common head / neck malignancy, and it is usually diagnosed late due to patients neglecting symptoms. The purpose of this systematic review is to verify the impact of Sars-Cov-2 pandemic on OSCC diagnosis. The search methodology follows the PRISMA statement performing a PubMed investigation from 2019 to 2021 using MeSH such as “Covid-19; oral cancer”. A multidisciplinary approach would be effective, with a broadening of the knowledge of health professionals to identify cancerous lesions. A timely diagnosis of OSCC is crucial and its management is fundamental also for dental specialists. With the aim to anticipate the diagnosis, it will be desirable to set prevention campaigns also by the assistance in telemedicine
Impacts of Teak Defoliator (Hyblaea puera) in Carbon Accumulation in Teak (Tectona grandis) Plantation Forest
No full textAmong the insects attacking teak well-known pests of the teak tree (Tectona grandis) i.e., Hyblaea puera (Lepidoptera: Hyblaeidae), popularly known as the teak defoliator is the most widespread and serious pest causing a loss in increment volume of plants. Having a high economic timber value, Tectona grandis has also played an important role in storing carbon. Hence, the present investigation has attempted to study the impacts of teaks defoliator Hyblaea puera on carbon stocks accumulation and overall growth in plantation forests and make acomparison with healthy teak plantation forests without the impacts of teak defoliator. Remaining all other factors constant, the study conducted on tropical regions of eastern Nepal has shown an 18% increase in carbon stocks in 2 years in the teak defoliator infected patch whereas it’s 38% in the healthy patch. Similarly, a highly positive correlation was found between diameter and height in a healthy patch in both the measurement i.e., 0.88 and 0.89. Whereas there is less positive correlation i.e.,0.64 and 0.69 in the infected patch.The mean height increment of the healthy plot was 1.1, while it was 0.5 in the case of the infected plot. Furthermore, the Mean DBH Increment of the Healthy plot was 2.1; however, it was 1.0 in the case of the infected plot. To sum up, this study at tropical regions has presented the impacts of teak defoliator (Hyblaea puera) on growth(height and diameter) and carbon accumulation on Teak plantation area
Impact of Hygiene on Malaria Transmission Dynamics: A Mathematical Model
No full textMalaria continues to pose a major public health challenge, especially in developing countries, as 219 million cases of malaria were found in 89 countries. In this paper, a mathematical model using non-linear differential equations is formulated to describe the impact of hygiene on malaria transmission dynamics. The model is divided into seven compartments which includes five human compartments namely; unhygienic susceptible human population (Su), hygienic susceptible human population (Sn), unhygienic infected human population (Iu), hygienic infected human population (In) and the recovered human population (Rn) while the mosquito population is subdivided into susceptible mosquitoes (Sv) and infected mosquitoes Iv. The positivity of the solution shows that a domain exists where the model is biologically meaningful and mathematically well-posed. The Disease-Free Equilibrium (DFE) point of the model is obtained. Then, the basic reproduction number is computed using the next generation method and established the condition for local stability of the disease-free equilibrium. Thereafter the global stability of the disease-free equilibrium was obtained by constructing the Lyapunov function of the model system. Also, sensitivity analysis of the model system was carried out to identify the influence of the parameters on the basic reproduction number. The result shows that the natural death rate of the mosquitoes is most sensitive to the basic reproduction number
Effect of Plant Growth Regulators on Growth and Quality Flower Production of Chrysanthemum (Chrysanthemum Indicum L.)
No full textA field study was conceded to assess the effect of plant growth regulators on growth and quality flower production of chrysanthemum at Horticulture Research Centre (HRC), Gazipur, Bangladesh. The experiment was laid out in Randomized Complete Block Design (RCBD) with ten (10) treatments and three replications. The treatments of plant growth regulators concentration were T1-50 ppm GA3, T2-100 ppm GA3, T3-150 ppm GA3, T4-400 ppm CCC, T5-600 ppm CCC, T6-800 ppm CCC, T7-250 ppm MH, T8-500 ppm MH, T9-750 ppm MH and, T10-Control. The maximum spreading of plant (27.0 cm) was observed when plants were treated with GA3 @ 150 ppm where the minimum plant spread (16.8 cm) was recorded in plants treated with CCC @ 800 ppm. The higher number of suckers (33) per pot was produced when pots were treated with GA3 @ 150 ppm whereas, application of CCC at three different concentrations produced lower number of suckers. The highest number of flower (40) was recorded with 150 ppm GA3, where minimum number of flowers (25) per pot in 800 ppm CCC. The plants sprayed with 50 ppm GA3 took 48 days to flower initiation, whereas, it took 70 days with 750 ppm MH. the highest plants recorded (7.40 cm) with 800 ppm CCC, whereas, lowest size (6.50 cm) was obtained with the application of 500 ppm MH. The maximum vase life of flowers was recorded for the treatment 800 ppm CCC (15 days), which was at par with 13 days vase life obtained by spraying 600 ppm CCC. Therefore, it is concluded that the GA3 acted as growth promoter and the CCC acted as growth retardants on yield and quality of chrysanthemum
Lepidopteran Insects Status and Diversity: A Review
No full textThe second largest and most well-known insect order Lepidoptera includes both butterflies and moths in the world. This study was started based on secondary information from present literature from different countries on the flora and fauna. So far, much study work was completed on this subject but those workers were not existing to the extension employees, policymakers, and the public in an efficient way to date. In this review paper, we can give the recent data on etymology, distribution and diversity, external morphology, different morphological parts of caterpillar, internal morphology, digestive system, circulatory system, reproduction and growth, respiratory system, and growth and role of the olfactive process in larval and adult lepidopteran insects. There are over one hundred and eighty thousand Lepidoptera species described, divided into one hundred and twenty-six families and forty-six superfamilies, and the total number of living beings was labeled as about ten percent. A result found is that the species of moths is about one hundred sixty thousand compared to one hundred seventy thousand five hundred species of butterflies in the world. Butterflies are an important category of insects that can function as sensors of environmental change. Butterflies are insects from the order Lepidoptera's macro-lepidopteran clade Rhopalocera. The study focused on the lepidopteran insects and the diversity of the world. It presents the review of research imperfect data on specific knowledge in diverse agroecological zones. This study acknowledged investigating breaches in different countries of the world. It also provides information on lepidopterans as alternative food and financial source of the world. It also helps in the sustainable agricultural field
Chemical Regeneration of A Dye-Laden Activated Carbon: Optimization via The Box-Behnken Experimental Design
No full textActivated carbon is widely used as an adsorbent to remove numerous pollutants from water and wastewater. The cost-effectiveness of an adsorbent depends upon its ability to be reused. This study focuses on regenerating Millettia thonningii seed pods' activated carbon (MAC) saturated with Methylene Blue (MB) using acetic acid as a regenerating solvent and exploring its potential to be reused. The effects of the variables such as, the concentration of the regenerating solvent, contact time, and volume of regenerating solvent on the regeneration process were ascertained using the Box-Behnken experimental design, which is a sub-set of Response Surface Methodology. The regeneration process was evaluated based on the desorption capacity of the active carbon. Scanning Electron Microscopy (SEM) and Fourier Transform Infrared spectroscopy (FTIR) was used to characterize the surface of the saturated active carbon before and after regeneration. Results revealed that the concentration of the regenerating solvent had the most significant synergistic effect on the regeneration process. The optimum conditions for the maximum regeneration of the spent activated carbon within the range of the variables studied were found to be: 8M acetic acid, 100 min, and 40 mL of acetic acid. The regenerated and pristine MAC when reused to adsorb fresh MB solutions (50 ml of 10mg/L MB: 0.2g adsorbent) had an adsorption capacity of 2.1912mg/g and 2.0977mg/g for MB respectively. Hence, the regenerated carbon outperformed the pristine active carbon. It could therefore be explored further as a recyclable adsorbent for wastewater treatment
The Identification of Euglenids (Euglenophyceae, Euglenophyta) from the Peat Waters of Palangka Raya, Indonesia
No full textThe aim of this study was to identify and describe the Euglenids (Euglenophyceae, Euglenophyta) from the peat waters of Palangka Raya, Central Kalimantan, Indonesia. This study revealed that 8 species of Euglenids were found in the study sites which belong to 3 genera, namely Euglena, Lepocinclis, and Phacus. The Euglenid species identified include Euglena gracilis G.A. Klebs 1883, Euglena mutabilis F. Schmitz 1884, Lepocinclis acus (O.F.Müller) B.Marin & Melkonian 2003, Lepocinclis ovum (Ehrenberg) Lemmermann 1901, Lepocinclis spirogyroides B.Marin & Melkonian 2003, Phacus cordatus (Pochmann) Zakryś & Lukomska 2015, Phacus helikoides Pochmann 1942, and Phacus orbicularis Hübner 1886. The eight Euglenid species found in this study have never been reported before, thus these findings provide additional new data regarding algae diversity in peat waters of Central Kalimantan, Indonesia
A Review on Calixarene Fluorescent Chemosensor Agents for Various Analytes
No full textCalixarenes are well-known supramolecular host molecules with versatile applications. Over the past decades, hundreds of selective and sensitive detections of several analytes have been reported by employing calixarenes as the chemosensor agent. The detection and quantification of metal ions and anions are crucial as heavy metal ions are harmful to living organisms, while monitoring anions is pivotal in the environmental samples. On the other hand, detecting and quantifying biomolecules and neutral molecules are critical due to their irreplaceable role in human health. In this review, we summarized the application of calixarenes as the supramolecular chemosensor agent for detecting metal ions, anions, biomolecules, and neutral molecules through fluorescent spectroscopy to give brief information on the design and development of the chemosensor field. This review updates the world with the application of calixarene derivatives as fluorescent chemosensors and challenges researchers to design and develop better chemosensor agents in the future