Waste Materials Research Articles

Lignin-Based Antioxidant Hydrogel Patch for the Management of Atopic Dermatitis by Mitigating Oxidative Stress in the Skin.

Atopic dermatitis (AD), a chronic skin condition characterized by itching, redness, and inflammation, is closely associated with heightened levels of endogenous reactive oxygen species (ROS) in the skin. ROS can contribute to the onset and progression of AD through oxidative stress, which leads to the release of proinflammatory cytokines, T-cell differentiation, and the exacerbation of skin symptoms. In this study, we aim to develop a therapeutic antioxidant hydrogel patch for the potential treatment of AD using lignin, a biomass waste material. Lignin contains polyphenol groups that enable it to scavenge ROS and exhibit antioxidant properties. The lignin hydrogel patches, possessing optimized mechanical properties through the control of the lignin and cross-linker ratio, demonstrated high ROS-scavenging capabilities. Furthermore, the lignin hydrogel demonstrated excellent biocompatibility with the skin, exhibiting beneficial properties in protecting human keratinocytes under high oxidative conditions. When applied to an AD mouse model, the hydrogel patch effectively reduced epidermal thickness in inflamed regions, decreased mast cell infiltration, and regulated inflammatory cytokine levels. These findings collectively suggest that lignin serves as a therapeutic hydrogel patch for managing AD by modulating oxidative stress through its ROS-scavenging ability.

The effects of water content on mineralogical and drainage quality dynamics in weathering mine waste rock

Water content plays a critical yet ambivalent role in the physical and geochemical stability of mine tailings and waste rock, but its effects on individual chemical weathering reactions (dissolution and precipitation) and bulk water quality remain poorly understood. We experimented with synthetic waste rock to quantitatively reconcile modal and textural mineralogical parameters (mineral size, association, and liberation) with leachate quality at different water saturation levels (5–100%). Leachate pH consistently decreased from a 13-week average of 6.14 at 100% saturation to 5.37 at 5% saturation. Simultaneously, mineralogical analyses revealed a reduction in the size of carbonate phases over the course of weathering, decreasing from 200 µm to 145 µm as water saturation increased from 5% to 100%, which could be a contributing factor to more alkaline pH in samples with higher water saturation. Total concentrations of iron (Fe) and copper (Cu) in solution increased with lower moisture, with Cu concentrations increasing 24-fold in samples at 5% saturation compared to full saturation. In contrast, arsenic (As) concentration increased with higher moisture levels, which we attribute to reduced galvanic protection of As-bearing pyrite from oxidation. Multivariate statistical evaluation allowed us to uncover correlations between water chemistry and mineralogical data (i.e., sulfide associations or phase perimeters) and to explain chemical differences between samples, particularly those at 100% and 5% water saturation. Our findings underscore the importance of conducting quantitative mineralogical investigations on mine waste materials and considering their stored water content in the formulation of mine waste management strategies.

Assessing the durability properties of sandcrete blocks incorporating iron filings as fine aggregate

The rising costs of construction materials, particularly sandcrete blocks, necessitate the exploration of cost-effective alternatives. This study examines the feasibility of incorporating iron filings (IF), a by-product of metal workshops, into hollow sandcrete block production and assesses their performance under harsh conditions. IF was used to replace 5–20 % of the fine aggregate component in blocks at a step of 5 %, mixed at a 1:8 ratio, and sized at 450mm×150mm×225mm. The study evaluated the impact of acidic exposure on the density, sorptivity, and compressive strength of these blocks, as well as their sensitivity to elevated temperatures. The results showed that IF blocks had significantly lower density than non-IF blocks, especially those cured with H₂SO₄. For instance, blocks with 15 % IF and cured in 0.3 mol/dm³ H₂SO₄ had a 13.9 % reduction in density. Despite higher acid concentrations, IF samples demonstrated better sorptivity, absorbing water more slowly than non-IF samples. However, exposure to acidic media reduced compressive strength by 1.9 %–47.8 % for HNO₃ exposure and 0.5 %–42.4 % for H₂SO₄ exposure. None of the acid-exposed blocks met the minimum standards for load-bearing (2.5 MPa) or non-load-bearing walls (2.0 MPa) as per NIS standards. Furthermore, the sensitivity of IF sandcrete blocks to changes in compressive strength under elevated temperatures decreased by almost half, from 0.026 to 0.014 MPa/°C, as the curing period increased from 7 to 28 days. Blocks with 5–15 % IF showed improved compressive strength at temperatures below 150 °C, but strength declined sharply beyond this temperature. By utilising IF, a readily available waste material, the implications of the study are significant for promoting a circular economy in the construction industry. However, the performance of the blocks against durability concerns needs to be improved further before integrating such waste materials into developing sustainable and resilient construction materials

ELEMENTerial – Construction System Study for CLT Offcuts

The ELEMENTerial research project focuses on the development of an innovative design and construction system for Cross-Laminated Timber (CLT) offcuts. CLT construction, while offering advantages for automation, raises concerns about offcut waste, which constitute 5-10% of the material production in Estonian CLT timber industry. This research highlights the importance of aligning timber construction with circular economy principles by effectively utilising offcuts. The study focuses on the development of a design method, creating a versatile and holistic construction system that breaks away from traditional orthogonal designs. Algorithmic tools are employed to streamline the design process and to help manage the complexities of working with smaller elements. The outcomes include a geometric strategy, offering variable configurations for assembly in walls, floors, ceilings and openings. The research demonstrates the potential to automate and pre-rationalise the design process, providing design freedom beyond orthogonal constraints and shell structures. The applications range from shelters to facade systems, building extensions to potentially large-scale construction systems. This study offers environmental benefits and design flexibility in the construction industry. It holds a potential to guide the sector towards reduced waste and increased material efficiency, fostering sustainability and economic value from waste materials. The prospects for future research include further automation, refinement of connection details, and efficiency in production and material usage.

Anaerobic Two-Phase Co-Digestion for Renewable Energy Production: Estimating the Effect of Substrate Pretreatment, Hydraulic Retention Time and Participating Microbial Consortia

Green and sustainable economies have recently become a key issue in long-term growth and well-being. Co-digestion of various waste materials in an eco-friendly way through biogas production has become the preferred method for their utilization and valorization. The possibility of hydrogen and methane yield maximization depends on the most suitable alkali reagent for pretreatment of waste lignocellulosic material, which was revealed in batch tests to determine the hydrogen production potential. The mixture for digestion consisted of pretreated wheat straw mixed with waste algal biomass in a ratio of 80:20 (w/w). The maximum hydrogen yield was achieved after applying sodium hydroxide thermoalkaline pretreatment, with a two-fold higher yield than the untreated control. Hydrogen production was stable and methane was not present in the resultant gas. The influence of the hydraulic retention time (HRT) on the maintenance of cascade installation was studied. The maximum daily concentration of hydrogen was achieved at an HRT of 2 days—42.5% H2—and the maximum concentration of methane was 56.1% at an HRT of 6 days. Accumulation of volatile fatty acids was registered in the first step and their depletion was noted in the second one. The obtained values of the cellulose content demonstrated that it was utilized by up to 2.75% in the methanogenic bioreactor at the end of the process. Metagenomics analyses revealed the bacteria Thermocaproicibacter melissae (44.9%) and Clostridium cellulosi (41.9%) participated in the consortium, accomplishing substrate hydrolysis and acidogenesis in the first stage. Less in abundance were Thermoanaerobacterium butyriciformans, Calorimonas adulescens, Pseudomonas aeruginosa and Anaerocolumna chitinilytica. Methanogenesis was performed by an archaeon closely related to Bathyarchaeota (99.5%) and Methanobacterium formicicum. The most abundant bacterial strains in the methanogenic fermenter were Abyssalbus ytuae (30%), Proteiniphilum acetatigenes (26%) and Ruficoccus amylovorans (13%).

“Waste Is Wealth”: Circular Economy Strategies from Media Persuasion to Utilization

Circular economy strategies encompassing “Waste is Wealth” (also known as “Waste is Gold”) policies in Thailand have been popularised through various media. This study focused on a community of people in the central north of Thailand and their ”return waste for money” practices, with 403 participants surveyed in mid-2022. The analysis of their responses, using descriptive and inferential statistics, identified the factors contributing to the gap between the available information in the media regarding the existence of regulations and policies addressing the recycling and reusing of waste and people’s responses to that information. Residents’ knowledge and understanding of proper waste management, derived from the media, were essential elements in educating communities. The collection and disposal of garbage were handled very differently between the rural and urban communities, with different municipalities making different provisions for residents’ waste disposal. Our analysis showed that a holistic approach was needed, particularly including the publication of comprehensive and understandable information on government policies and regulations, the differentiation of waste material types, garbage and waste collection, and disposal methods, including returning, recycling, and reuse, which were identified as being necessary for effective and efficient waste disposal and encouraging recycling and reuse. It was shown that without valid information available via social media and the mass media, peoples’ attitudes and behaviours will not change and the recycling of plastic waste materials will be limited, even with the promise of Waste is Wealth.

Sustainable Waste Management in Orthopedic Healthcare Services

It is estimated that globally medical surgical specialties, including orthopedics, produce large amounts of hospital waste. However, the possibilities of recycling materials are not well highlighted. Orthopedic hospitals can collect larger volumes of recyclables that could be kept out of landfills. The general objective of this study is to identify the categories and related amounts of waste and recyclable materials produced by the main types of medical interventions in orthopedics. The specific objective is to evaluate the amounts of waste produced in the preoperative and intraoperative periods, but also their recycling potential. For one month, we analyzed eight types of orthopedic medical interventions, of which five were surgical and three were nonsurgical. These were performed at the County Emergency Clinical Hospital of Targu Mures in Romania. For surgical interventions, the waste was collected separately in the preoperative and intraoperative periods. Waste was divided into recyclable, nonrecyclable, and biological categories. The waste bags were weighed with a portable scale. The main results are the average amounts of recyclable waste produced per case in the eight types of medical interventions. The secondary results show the average amounts per case of nonrecyclable, biological, and total waste. To test for statistically significant differences between the types of medical interventions, we performed an analysis of variance. Seventy-four cases were included in the study. An amount of 466.2 kg of waste was collected, with an average mass of 6.3 kg per case. During the preoperative period, 130.3 kg of waste was produced, of which 78% was recyclable. During the intraoperative period, 303.8 kg of waste was produced and only 11% was recyclable. Trauma surgery produced the largest amount of waste, followed by arthroplasty. A quarter of orthopedic waste is recyclable, and the greatest potential for recycling is preoperative waste, which can be effectively recycled at three-quarters. Through effective recycling programs, the ecological footprint of orthopedic–traumatology interventions can be reduced.

Biodegradable PLA-based materials modified with hemp extract

Biodegradable polymers are susceptible to environmental degradation, particularly when exposed to factors such as moisture, temperature, light, and microorganisms. To mitigate these aging and degradation processes, the incorporation of anti-aging substances is crucial. While the polymer industry has traditionally relied on synthetic stabilizers, there is a growing interest in naturally occurring compounds as environmentally friendly alternatives. Hemp extract, the focus of this study, is a promising natural stabilizer mixture that is readily available. Hemp-derived stabilizers represent a relatively new area of research on polymeric materials, with limited studies evaluating the impact of hemp extract on degradation processes. This study investigated the effects of weathering and thermo-oxidative aging on PLA matrices containing hemp extract using infrared spectroscopy, spectrophotometry, static mechanical testing, and surface free energy analysis. These findings demonstrate that hemp extract effectively inhibits thermo-oxidative aging but has a catalytic effect on atmospheric aging. This difference can be attributed to distinct oxidation and reduction reactions under varying conditions, resulting in different decomposition products. Further research in this area is warranted due to the increasing interest in hemp and its derivatives as functional materials and substances, as well as the growing amount of waste materials generated during their production.

KELIMPAHAN MAKRO DEBRIS DI EKOSISTEM MANGROVE MUARA TUKAD MATI, BALI

Macro debris refers to waste materials ranging in size from 2.5 cm to 1 m, commonly found both on the water's surface and on the seabed. The accumulation of such large debris in coastal and marine environments can lead to various consequences, including disturbances to ecosystem stability and threats to the survival of organisms. Additionally, it diminishes the aesthetic quality of the environment. Among the ecosystems most susceptible to becoming repositories for this waste is the mangrove ecosystem. This study aims to quantify the amount, types, and abundance of macro debris scattered in the Tukad Mati Estuary Mangrove Area, Badung Regency, Bali. The research methodology involved several steps, starting with the selection of research stations. Transects measuring 5 x 5 meters were established. Within these designated areas, samples of macro debris were collected and categorized according to their composition, including materials such as plastic, fabric, glass, metal, and rubber. The results revealed that the total mass of macro debris collected in the Tukad Mati Estuary area amounted to 42,630 grams. The types of macro debris found in the Tukad Mati Estuary mangrove ecosystem consist of plastic, fabric, glass, metal, and rubber. Based on their quantity, the composition of macro debris is dominated by plastic at 87.02%, followed by fabric at 4.24%, rubber at 4.17%, glass at 2.67%, and metal being the least at 1.89%. Based on their weight, the composition of macro debris is highest for plastic at 32.33%, followed by rubber at 27.29%, fabric at 20.23%, glass at 14.36%, and metal being the lowest at 5.78%. The abundance of macro debris in the Tukad Mati Estuary mangrove ecosystem ranges from 0.85 items/m² to 10.68 items/m². Keywords: Marine Debris; Pollution; Tukad Mati Estuary; Mangrove

Simulating waste plastic flows in Australia

Plastics waste is a significant issue in Australia, with plastics waste generation continuing to grow. Central to the ‘circular economy’ concept is the flow of waste materials back into production, to be remade into new products. However, in Australia these flows are not visible due to limitations in published datasets. In this study, a waste supply-use framework is employed to model waste flows from consumption, through waste treatment and back into new production. This approach reveals how both plastics waste and recycled plastics become embodied in final consumption. The analysis shows there is currently no evidence that plastics waste generation has decoupled from either population or GDP growth. In fact, the recycling rate has declined in relative terms, potentially caused by recycling infrastructure limitations and an overall decline in Australian manufacturing.

Selenium bioaccumulation in Daphnia pulexvia aqueous and dietary exposure.

Pit lakes are currently being investigated as a way to store and reclaim waste materials in the Alberta Oil Sands (AOS) region, Canada. Lake Miwasin (LM) is a pilot-scale pit lake consisting of treated fine tailings overlayed with oil sands process-affected water (OSPW) blended with fresh surface water. In October 2021, the surface water contained a mean concentration of 1.33 ± 0.04µg/L dissolved selenium (Se), slightly above the Canadian Council of Ministers of Environment water quality guideline for long-term protection of aquatic life (1µg Se/L). This study assessed the bioaccumulation of Se by the cladoceran Daphnia pulex under laboratory conditions through both aqueous and dietary exposure routes for comparison to field-collected specimens. In 12-day semi-static tests, lab-cultured D.pulex were exposed to water, and algae grown in media spiked with selenate. Results showed that Se bioaccumulation by lab-cultured D. pulex increased in all exposure treatments from days 5 to 12, with maximum Se concentrations of 3.08-3.47µg/g dry weight (dw) observed within the exposure range tested. Interestingly, lower Se bioaccumulation concentrations (1.26-1.58µg/g dw) were observed in the highest dissolved Se and dietary Se treatments, suggesting potential internal regulatory mechanisms. In addition, native D. pulex (LM) collected from Lake Miwasin and cultured in-house were exposed in 8-day semi-static tests to Lake Miwasin surface water and algae cultured in Lake Miwasin surface water. Selenium bioaccumulation in native D. pulex (LM) ranged from 2.00 to 2.04µg/g dw at day 8 and was not significantly different (p > 0.05) compared to Se concentrations in D. pulex collected from Lake Miwasin (2.15 ± 0.28µg/g) in summer 2022.

Rheological, mechanical, and microscopic properties of polypropylene fiber reinforced-geopolymer concrete for additive manufacturing

This study focuses on developing fiber-reinforced geopolymer concrete (GPC) for 3D printing, utilizing construction waste materials and polypropylene fibers. The GPC, reinforced with 0.8 %, 1.0 %, and 1.2 % polypropylene fibers by volume, underwent comprehensive testing, including rheological, mechanical, and microstructural analyses for lab-cast and 3D-printed samples. The results indicated that the 0.8 % polypropylene fibers enhanced flexural and tensile strengths by 8.2 % and 71.7 %, respectively, albeit decreasing compressive strength by 26.2 %. Higher polypropylene percentages led to adverse effects on material properties. Microscopic analysis revealed the formation of voids around fibers and features associated with incomplete hydration. The study emphasizes the need for optimizing water content and the use of longer polypropylene fibers. It also highlights the benefits of using GPC in the 3D printing of structural components.

Bio responsive block: The performance of bio waste material with reduced environmental impact

The key purpose of this research is to establish guidelines on how to manage Bio Waste Material. A field study was performed to examine the environmental problems caused by Bio Waste Material that is made up of Perna Viridis (PV) shells, the latter of which is a common type of mussel found in Bang Ja Kreng Community, Samut Songkhram Province. This area is a fishery location and experiences vast quantities of shell waste, which ultimately impacts community pollution. It is not possible to dispose of this waste in a traditional manner and there are no specific locations where the shells can be dumped. Consequently, most people secretly dispose of them in mangrove forests or along public roadsides. Thus, in order to facilitate future use, the researcher conducted an analytical investigation to examine material performance. The temperatures at which mussel shells were burned were 400, 800, and 1200 °C. An X-ray diffractometer (XRD), a device that examines X-ray diffraction through layers of atoms or molecules in materials or sample substances, was Utilised to Analyse their elements. Furthermore, this analytical investigation also included X-ray fluorescence (XRF) as a tool to examine the elemental compositions. It was discovered that burning altered the chemical structure at different temperatures. Portland cement contained the same components. It was revealed that CaO constituted as much as 80.14 % of the weight below 1200 °C. In general, CaO was discovered to constitute up to 64.73 % of the weight when comparing cement. It is a substance that is used to research cement reduction when manufacturing Bio-Responsive Blocks. In order to compare lower costs and larger profits, the compound was divided into different ratios. An ANSYS simulation was used to Analyse the material properties and create three models: one for a single concrete Block and another for an 80 × 80 cm wall. The experiments did not involve the use of columns or beams. Instead of using the wall as a load-bearing wall, the goal was to add value to the product processing of mussel shell waste and determine how it can be recycled and reused beneficially (i.e., to improve sustainability or create a pleasant community environment.

Advancing sustainable production of eco-friendly foamed concrete: a comprehensive review on utilizing waste materials for cement reduction

Advancing sustainable production of eco-friendly foamed concrete: a comprehensive review on utilizing waste materials for cement reduction

Upcycling of tetra pack waste cellulose into reducing sugars for bioethanol production using Saccharomyces cerevisiae

Bioethanol production from waste materials offers a promising avenue for sustainable energy and waste management. In this study, fermentable sugars derived from tetra pack waste cellulose were bio-transformed into bioethanol using Saccharomyces cerevisiae. Tetra pack waste (180 g) yielded tetra pack cellulosic pulp (TPCP) of 145 g, after removing the different layers representing 80.56 ± 0.32% of the original weight. Cellulase from Bacillus sp. RL-07, with a cellulolytic potential of 6.98 ± 0.36 U/ml, released 32.72 ± 0.12 mg/ml of reducing sugars, achieving 44.60 ± 0.56% saccharification of TPCP under optimized conditions. Subsequent fermentation of the broth (1 L) with tetra pack cellulosic pulp hydrolysate (TPCPH) (50% v/v), containing 5.12 g of reducing sugars, by S. cerevisiae yielded 1.42 g of bioethanol per g of reducing sugars under optimized conditions, with a volume productivity of 0.24 g/l/h and a purity of 96.42% was confirmed by GC/MS analysis.The results of this study underscore the viability of utilizing tetra pack waste for bioethanol production, offering a sustainable solution for waste management while alleviating energy deficits and reducing environmental pollution. These findings align with objectives aimed at fostering sustainable progress and development.

Effect of Soil Stabilization on Structural Design of Flexible Pavement

Inadequate subgrade conditions often diminish the lifespan of pavements built on these soils. However, this challenge can be addressed through various methods, including soil stabilization, which enhances soil strength. This research focuses on soil stabilization using two types of waste materials (rubber and plastic) as additives in concentrations of 5%, 10%, and 15%, along with a consistent cement inclusion of 3% across all samples. Different tests, such as Sieve analysis, Atterberg Limits, Specific Gravity, Standard proctor Test and California Bearing Ratio, were performed for both the soil and the additive materials. As a result, this stabilization approach improved the California Bearing Ratio (CBR), leading to thinner pavement layers, which potentially lowers construction costs. Notably, the highest CBR observed was 49.95% with 10% plastic, while the top result for rubber was a 28.01% CBR at 5% inclusion. These enhancements in CBR values contributed to reducing the total thickness of the pavement layers by (435 mm) for both materials.

Precious Metal Recovery from Wastewater Using Bio-Based Techniques.

The recovery of metals from waste material has been on the increase in the past few years due to a number of reasons such as supporting the diversification of metal supply resources. In addition, the alternative use of the waste material for metal recovery can add to the main production line, boosting production throughput and profitability thus, allowing companies to sustain their activities during times of low commodity prices. While there has been a lot of research and interest in the recovery of precious metals such as platinum group metals (PGMs), Au, and Ag from solid waste material, there has been limited focus on the recovery of these value metals from wastewater. This is mostly related to challenges associated with finding cost-effective technologies that can recover these metals from solutions of low metal concentrations. In recent years, bio-based technologies have, however, become established as potential alternatives to traditional techniques in the treatment of wastewater due to their ability to recover metals from solutions of low concentrations. While wastewater might be characterized by some significant value metal content, it also contains other components that have potential economic value if recovered or converted to by-products. Such an approach may not only provide an opportunity for extraction of metal resources from wastewater but also contributes toward the circular economy. This chapter presents insights into precious metal recovery from wastewater using bio-based technologies, compares such an approach to the traditional techniques, explores the recovery of other value-added products and finally considers some of the challenges associated with the large-scale application of the bio-based technologies.

Push-out test of eco-friendly steel-concrete–steel composite sections enhanced by polypropylene fibers: An experimental study and statistical analysis

Steel-concrete-steel (SCS) structural element solutions are rising due to their advantages over conventional reinforced concrete in terms of cost and strength. The impact of SCS sections with various core materials on the structural performance of composites has not yet been fully explored experimentally, and in this work, both slag and polypropylene fibers were incorporated in producing eco-friendly steel-concrete-steel composite sections. This study examined the ductility, ultimate strength, failure modes, and energy absorption capacities of steel-concrete-steel filled with eco-friendly concrete, enhanced by polypropylene fiber (PPF) to understand its impact on modern structural projects. Eco-friendly concrete was produced by the partial replacement of cement with waste material such as ground granulated blast-furnace slag (GGBS) to reduce carbon dioxide emitted as one of the by-products of cement which harms the environment. A constant rate of cement replacement with GGBS was used. Polypropylene fibers were used as a fill material in the structural elements to enhance the performance. Seven specimens of SCS were analyzed for their mechanical properties using push-out monotonic loading. The control specimen was constructed with a conventional concrete core, even as testing specimens had different amounts of polypropylene fiber added to the core. The current investigation indicates that the impact of polypropylene fiber (PPF) material filling concrete on SCS performance is somewhat smaller than that of ordinary concrete (less than 10 percent). Applying PPF to concrete can increase its tensile strength, slow the spread of cracks, and strengthen the material overall. The compressive strengths of the samples were affected by the proportion of PPF, with the strength increasing from 47.6 MPa to 56.43 MPa as the PPF levels increased from 0 to 2 percent. Compared to the control sample, the PPF SCS specimens had an increased energy absorption. On the other hand, in comparison to PPF SCS specimens, the ductility level of the control sample was smaller.

Critical review on physiological aspects of Samana Vata

Background: Samana Vata which is located near the seat of Agni and it have role in digestion as well as in the assimilation of ingested food. Anna Grahana, Pachana, Vivechana and Munchan are the functions of Samana Vata. The physiological functions of Samana Vata can be correlated with enteric nervous system which is known as the second brain, and parasympathetic and sympathetic supply of autonomic nervous system. ENS functions by maintaining the enteric homeostasis and also act as modulator in gut barrier functions. After the food reaches stomach, several digestive juice acts on it. Gastric juice, pancreatic juice, all contains important digestive enzymes and act on food. Secretion of this enzyme is mostly under the control of intrinsic and extrinsic enteric nervous system. Aims and Objective: To critically analyse the concept of Samana Vata and find out the correlation with modern physiology. Materials and Methods: Literature review was referred from different classical text books and relevant modern textbooks, articles, data bases like google scholar, pubmed. Conclusion: Samana Vata chiefly locates in the middle part of body. It is primarily responsible for stimulation of Agni and leads to digestion, absorption, separation of essence and waste material. Function of Samana Vata, described by Acharyas can be compared with the physiological function of enteric nervous system. It can be partially correlated with enteric nervous system, sympathetic and parasympathetic supply of autonomic nervous system.

Fabrication of heteroatom-doped cobalt oxide yolk–shell microsphere using recycled solution from waste materials and their excellent electrochemical properties as an anode material for lithium-ion batteries

Fabrication of heteroatom-doped cobalt oxide yolk–shell microsphere using recycled solution from waste materials and their excellent electrochemical properties as an anode material for lithium-ion batteries