Standard Production Research Articles

The Structure, Functions and Potential Medicinal Effects of Chlorophylls Derived from Microalgae.

Microalgae are considered to be natural producers of bioactive pigments, with the production of pigments from microalgae being a sustainable and economical strategy that promises to alleviate growing demand. Chlorophyll, as the main pigment of photosynthesis, has been widely studied, but its medicinal applications as an antioxidant, antibacterial, and antitumor reagent are still poorly understood. Chlorophyll is the most important pigment in plants and algae, which not only provides food for organisms throughout the biosphere, but also plays an important role in a variety of human and man-made applications. The biological activity of chlorophyll is closely related to its chemical structure; its specific structure offers the possibility for its medicinal applications. This paper reviews the structural and functional roles of microalgal chlorophylls, commonly used extraction methods, and recent advances in medicine, to provide a theoretical basis for the standardization and commercial production and application of chlorophylls.

Implementation and Assistance of Halal Certificates in the Acceleration and Development of Halal Tourism Products in Indonesia and Bahrain

Halal standard products should be an integral and inseparable part of global trade and economic practices which require international standards and standard quality to gain the trust of consumers across countries. The state is present to protect its citizens in fulfilling their citizens' fundamental rights. In line with this, business actors (producers) should also provide protection to consumers. For this purpose, a more active role is required for the state in regulating the economic system, which is described in the strategy carried out by the state in carrying out business instruments, including through regulations. Halal certification-labeling not only aims to provide inner peace to Muslims but also production peace for business actors. Especially in the context of economic globalization and global markets, halal food certification and labeling is increasingly necessary. The problem formulation in this research is as follows: 1. How to implement and assist Halal certification in accelerating Halal Tourism products in Indonesia and Bahrain.2. How to implement and assist Halal Certificates in the Development of Halal Tourism Products for Indonesia and Bahrain. he objectives of this research are as follows: 1. To measure the extent of the implementation and assistance of Halal certification in accelerating Halal Tourism products in Indonesia and Bahrain. 2. To find out how to implement and support Halal Certificates in the development of Halal Tourism Products for Indonesia and Bahrain. The method stages in this research are as follows: 1. Conduct socialization about Halal Certification to MSMEs, through FGD, 2. Directing the procedures for implementing and assisting Halal Certificates in accelerating Halal Tourism products, through Technical Guidance, Workshops, FGDs and Umkm Collaboration.

Microwave hydrolysis, as a sustainable approach in the processing of seaweed for protein and nanocellulose management

The nature of marine biomass is very complex for a material scientist due to the large seasonal variation in the chemical composition that makes it difficult to prepare standardized products. A systematic investigation of the interaction of microwave irradiation with seaweed from Norway and Caribbean region was performed, covering a broad temperature range (130 → 170 °C) and without and with addition of ℽ-valerolactone (GVL) in ratios of 1:4 and 1:2. The temperatures above 150 °C and without addition of GVL led to the closure of mass balances up to 90 % that includes polysaccharides, “pseudo-lignin” fraction, fatty acids, and proteins. Fucoidan and mannose represented >50 % of all detected polysaccharides in ascophyllum nodosum (AN), while aegagropila linnaei (AL) contained mostly glucose. The presence of arabinose and rhamnose in the upper surface of the cell wall hinders the glucose release during microwave treatment. The differences in the polysaccharide composition among both algae samples hindered the definition of a parameters set that can be used in microwave treatment of various seaweed species. A large fraction of protein (> 95 %) remained in the seaweed solid residue. Higher amount of protein was determined in AL, which was dominated by leucine and lysine. Another potential barrier to the application of seaweed in industry is the limited knowledge on the chemical composition of “pseudo-lignin” and extractives. The total amino acid analysis was identified as the most accurate to characterize the protein yield and composition. The results showed that microwave treatment of seaweed is indeed a viable method for producing bioactives in the temperature range 120–150 °C, and proteins and nanocellulose at temperatures above 170 °C without using GVL. The microwave temperature and seaweed type played a dominating role in the mass closure balances leading to >95 % identified compound.

Decidability of the Satisfiability Problem for Boolean Set Theory with the Unordered Cartesian Product Operator

We give a positive solution to the decidability problem for the fragment of set theory, dubbed BST ⊗, consisting of quantifier-free formulae involving the Boolean set operators of union, intersection, and set difference, along with the unordered Cartesian product operator ⊗ (where \(s \otimes t := \big \lbrace \lbrace u,v\rbrace \,\texttt {|}\:u \in s \wedge v \in t \big \rbrace\) ), and the equality predicate, but no membership. Specifically, we provide nondeterministic exponential decision procedures for both the ordinary and the finite satisfiability problems for BST ⊗. We expect that these decision procedures can be adapted for the standard Cartesian product and, with added technicalities, to the cases involving membership, providing a solution to a longstanding problem in computable set theory.

A Study on Suitable Bulk Packaging for Fresh Agricultural Products

This paper aims to investigate suitable packaging for large and bulky agricultural products and to suggest recommendations to enhance packaging-based types of products. Packaging of agricultural products plays a vital role in protecting products from damage and facilitating transportation activities. In Malaysia, regulations for packaging purposes have been outlined under the Grading, Packaging, and Labeling of Agricultural Products (GPL) Regulations enacted under Section 3(2) (c) of Act 141 for the target group, namely manufacturers, wholesalers, exporters, importers, and retailers. However, standard agricultural product packaging practices among these players are not only unable to provide maximum protection in terms of quality, hygiene, and durability, but have negative impacts on agricultural products. There is also a non-compliance issue for bulk packaging weights exceeding 30 kilograms, especially large-sized agricultural products. This research provides a comprehensive, up-to-date review of bulk packaging of fresh agricultural products from the point of view of materials use, cost, and packaging weight. A total of 189 respondents, represented by wholesalers and exporters, were selected. This study found that bulk packaging used by most wholesalers for large-sized fruits in the domestic market must comply with the weight outlined by the GPL regulations. However, all exporters follow the GPL and importing countries' rules. This study also found that Thailand, the Philippines, Vietnam, and Japan mainly used plastic baskets, wooden pallets, and corrugated cardboard boxes and packaging for fresh agricultural produce widely used for export activities. However, the type and packaging materials used varied according to the type of agricultural product.

Combustion characteristics of diisopropoxymethane, a low-reactivity oxymethylene ether

Oxymethylene ethers (OMEs) have been studied for use as low-sooting diesel fuel additives or substitutes; very little literature discusses OMEs as spark-ignition (SI) fuels due to their typically high cetane numbers. In this work, a lower-reactivity, branched OME, diisopropoxymethane (DIPM), is evaluated to determine its effectiveness as a spark-ignition fuel, as it is the lowest-reactivity OME (as determined by Indicated Cetane Number) thus far evaluated in the literature. DIPM is synthesized in-house via acetalization from isopropanol (iPrOH) and trioxane using standard OME production practices. DIPM was then tested in a rapid compression machine (RCM) for autoignition and spark ignition characteristics, and in a modified CFR engine to determine effective octane numbers. In the RCM, an autoignition temperature sweep was performed at stoichiometric conditions from 1000/T = 1.7 - 1.0, at 5:1 inert ratio (comparable to approximately 25% EGR), where it was found that DIPM has ignition delay times 5–10x faster than isooctane and displays NTC ignition behavior. Blends with iPrOH indicate that reactivity can be matched with isooctane with low blend ratios of iPrOH in DIPM. Flame speeds were tested with a laser spark for ignition in the RCM, where the flame speed of DIPM and isooctane is determined to be comparable at engine relevant conditions. In the CFR engine, effective RON and MON based on pressure trace frequency domain measurements were determined for DIPM and a 15 vol% iPrOH in DIPM blend. Neat DIPM has (R+M)/2 = 59 and a negative sensitivity of S = -18, consistent with its NTC behavior and higher reactivity. The DIPM/iPrOH blend has positive sensitivity and a pump-gasoline range (R+M)/2 = 89.3. DIPM on its own is unlikely to be an effective SI fuel, however, when blended with iPrOH as an ON booster, it may be a promising SI candidate fuel.

Studies On The Effect Of Sugar In Bioactive Components Retention On Amla Products

Amla fruit (Emblica officinalis) commonly known as Indian gooseberry or Amla, is perhaps the most important medicinal plant in the Indian traditional system of medicine, the Ayurveda.Vitamin C, tannins and flavonoids present in amla have powerful antioxidant activities. Due to rich Vitamin C content, amla is successfully used in the treatment of diabetes mellitus. It is one of the oldest Indian fruits and considered as "wonder fruit for health". Amla pulp of fresh fruit contains 200-900 mg/100 g of vitamin C. Ascorbic acid retention was found to be decreased with increase in temperature. The fruit is highly perishable in nature and is available for short period from October to January. The amla fruit possess excellent nutritive and therapeutic value and to promote the use of amla among the public. Hence an attempt was made to standardized sweet-based products viz. jam, squash and jelly with different treatments. The prepared amla products were standardized based on sensory evaluation. The bio active components and sensory evaluation of amla products were analysed during the storage period. The shelflife studies of amla jam, squash and jelly were also done at room temperature and it has more shelflife with high organoleptic scores.

Radiative cooling textiles using industry-standard particle-free nonporous micro-structured fibers

Abstract Thermal radiation is a major dissipative pathway for heat generated by the human body and offers a significant thermoregulation mechanism over a wide range of conditions. We could use this in garment design to enhance personal cooling, which can improve the wearing comfort of garments or even result in energy savings in buildings. At present, however, radiative cooling has received insufficient attention in commercial design and production of textiles for wearable garments. Textiles that efficiently transmit the radiative heat were recently demonstrated, but either do not utilize standard weaving and knitting processes for wearable garments or require substantial process modifications. Here, we demonstrate the design and implementation of large-scale radiative cooling textiles for localized cooling management and enhanced thermal comfort using industry-standard particle-free nonporous micro-structured fibers that are fully compatible with standard textile materials and production methods. The micro-structured fibers, yarns and fabrics are part of a hierarchical photonic structure design that renders the textiles highly infrared transparent (up to > 0.8) while assuring visual opacity (up to 0.99). We design radiative cooling textiles with first-principles electromagnetic methods and fabricate them using commercial textile materials and formation facilities. Our “fabless” approach is confirmed by very good quantitative agreement between design and measurements. The resulting fabrics exhibit wearability properties expected of wearable textiles, and lower skin temperature by ≥ 3 °C compared to conventional textiles, which offers the potential for > 30 % energy savings in buildings and increases wearing comfort by significantly reducing the reliance on latent heat dissipation for thermoregulation.

Exploring commercial water electrolyser systems: a data-based analysis of product characteristics

Abstract The urgency for energy transition is evident through the increasing demand for new technologies such as water electrolysers (WEs), which have the potential to generate green hydrogen using renewable electricity. This paper aims to provide a comprehensive overview of the technical capabilities of commercially available WE system products. The analysis is based on publicly accessible data gathered from 28 WE manufacturers worldwide with a total of 186 products, focusing on technology types and various technical characteristics of each WE system, including capacity, footprint, hydrogen output pressure, hydrogen purity and conversion rate. The analysis reveals that the current WE system solutions in the market exhibit diverse and varied characteristics. Further, there is a lack of standardized product specifications adopted by manufacturers. This underscores the urgent need for the development of frameworks and standards. Implementing such standards is crucial for enhancing clarity and understanding, facilitating efficient comparisons and selection processes, and supporting the future advancement of WE technologies and WE-enabled Power-to-X applications on a global scale.

Slow food and the slow food movement: a case study of consumer activism in Turkiye

PurposeThe slow food movement has become increasingly widespread globally in recent years. This paper focuses on explaining how Turkish cuisine, which has a deep-rooted history, meshes with the slow food movement and how this movement affects consumer behavior.Design/methodology/approachBased on expert opinion analysis with academics knowledgeable about the food industry and gastronomy, this paper explores how the slow food movement in Turkiye is evolving and how consumers perceive it. Content analysis was applied to the data obtained from the personal interviews.FindingsThe authors find that the slow food movement creates a strong brand image for businesses that rely on emphasizing the responsibility to the ecological system while appealing to the five senses of consumers. It already shows great potential even in emerging markets where typical household discretionary income is modest.Practical implicationsBased on key theories regarding all sales activism cases, the authors have offered insights into the dynamics, motivations and techniques of the case. Ensuring the preservation of the slow food movement, framing and creating associations need to be examined.Originality/valueSlow food is a movement that emerged against the standard, fast, tasty, but unhealthy products of the fast-food industry. It entails product variety, local flavors and preference for the single-flavor focus embedded in the fast-food movement. The movement started with considerations of gastronomy and later was institutionalized as a social movement phenomenon. Later, it expanded its base to activism, targeting various social issues.

Improving Packaging and Marketing of Local Products Through the Application of Packaging Technology and Innovation to Increase the Income of the Community in Opak Village

Community service activities in the national combination program are conducted in Waqf Village, Sukaratu Village, and Majasari Pandeglang District, with target partners of opaque food artisan groups and waqf farmer groups. The problem of the target partners is that neither partner has been able to implement business management, online marketing, or the application of innovation technology in standard production processes. The purpose of community service in the national service program is to improve the knowledge and skills of target partners in implementing business management, online-based marketing and the application of innovation technology in the production process. The method of activities in community service is socialization of national programs, application of technology in the production process, training, mentoring and evaluation. The results of this activity show that the two target partners can apply business management, online marketing (e-commerce), and the application of packaging technology with nitrogen injects and the application of production with a solar dome dryer to dry opaque fillings, which is very helpful during the rainy season, they can continue production, and there is an increase in the business of both target partners to reach 80%.

Preoperative Immunonutrition and Postoperative Outcomes in Radical Pancreaticoduodenectomy Patients.

This study aimed to compare the patient groups who received and did not receive immunonutrition in terms of mortality and morbidity in patients who underwent radical pancreaticoduodenectomy. Two groups were formed from 40 patients who underwent radical pancreaticoduodenectomy in our clinic in 2021. The patients in study group were given enteral immunonutrition support for 5 days preoperatively. For this purpose, a standard enteral immunonutrition product containing arginine, omega-3 fatty acids, and RNA (dietary nucleotides) was used. Patients' data of demographical, laboratory, postoperative complications, and current clinical status were analyzed. Mortality developed in 5 (25 %) patients in the treatment group and 4 (20 %) patients in the control group in the following months (P > .05). The estimated survival rate in the treatment group was 21.8 ± 2.8 months in the treatment group 19.1 ± 1.7 months in the control group (P > .05). The length of hospital stay was 12.89 ± 3.3 days in the treatment group, while it was 16.47 ± 6.83 days in the control group (P < .05). In the postoperative follow-ups, delayed gastric emptying symptoms developed in 3 patients in the treatment group, while the same complication was observed in 9 patients in the control group (P < .05). Surgical site infections occurred in 4 patients in the treatment group and 9 patients in the control group (P < .05). It was observed that preoperative oral immunonutrition before pancreaticoduodenectomy was effective in reducing the risk of delayed gastric emptying after surgery and the length of hospital stay.

Sensor-independent LAI/FPAR CDR: reconstructing a global sensor-independent climate data record of MODIS and VIIRS LAI/FPAR from 2000 to 2022

Abstract. Leaf area index (LAI) and fraction of photosynthetically active radiation (FPAR) are critical biophysical parameters for the characterization of terrestrial ecosystems. Long-term global LAI/FPAR products, such as the moderate resolution imaging spectroradiometer (MODIS) and the Visible Infrared Imaging Radiometer Suite (VIIRS), provide the fundamental dataset for accessing vegetation dynamics and studying climate change. However, existing global LAI/FPAR products suffer from several limitations, including spatial–temporal inconsistencies and accuracy issues. Considering these limitations, this study develops a sensor-independent (SI) LAI/FPAR climate data record (CDR) based on Terra-MODIS/Aqua-MODIS/VIIRS LAI/FPAR standard products. The SI LAI/FPAR CDR covers the period from 2000 to 2022, at spatial resolutions of 500 m/5 km/0.05∘, 8 d/bimonthly temporal frequencies and available in sinusoidal and WGS1984 projections. The methodology includes (i) comprehensive analyses of sensor-specific quality assessment variables to select high-quality retrievals, (ii) application of the spatial–temporal tensor (ST-tensor) completion model to extrapolate LAI and FPAR beyond areas with high-quality retrievals, (iii) generation of SI LAI/FPAR CDR in various projections and various spatial and temporal resolutions, and (iv) evaluation of the CDR by direct comparisons with ground data and indirectly through reproducing results of LAI/FPAR trends documented in the literature. This paper provides a comprehensive analysis of each step involved in the generation of the SI LAI/FPAR CDR, as well as evaluation of the ST-tensor completion model. Comparisons of SI LAI (FPAR) CDR with ground truth data suggest an RMSE of 0.84 LAI (0.15 FPAR) units with R2 of 0.72 (0.79), which outperform the standard Terra/Aqua/VIIRS LAI (FPAR) products. The SI LAI/FPAR CDR is characterized by a low time series stability (TSS) value, suggesting a more stable and less noisy dataset than sensor-dependent counterparts. Furthermore, the mean absolute error (MAE) of the CDR is also lower, suggesting that SI LAI/FPAR CDR is comparable in accuracy to high-quality retrievals. LAI/FPAR trend analyses based on the SI LAI/FPAR CDR agree with previous studies, which indirectly provides enhanced capabilities to utilize this CDR for studying vegetation dynamics and climate change. Overall, the integration of multiple satellite data sources and the use of advanced gap filling modeling techniques improve the accuracy of the SI LAI/FPAR CDR, ensuring the reliability of long-term vegetation studies, global carbon cycle modeling, and land policy development for informed decision-making and sustainable environmental management. The SI LAI/FPAR CDR is open access and available under a Creative Commons Attribution 4.0 License at https://doi.org/10.5281/zenodo.8076540 (Pu et al., 2023a).

3D SPACE KINEMATICS OF A ROBOT FOR PROCESS AUTOMATION IN METALLURGY

3D SPACE KINEMATICS OF A ROBOT FOR PROCESS AUTOMATION IN METALLURGY

MESENCHYMAL STEM CELL-DERIVED EXTRACELLULAR VESICLE MIMETICS AS OSTEOINDUCTIVE MEDIATORS: AN IN VITRO INVESTIGATION

Mesenchymal stem cells-derived extracellular vesicles (MSC-EVs) have great promise in the field of orthopaedic nanomedicine due to their regenerative, as well as immunomodulatory and anti-inflammatory properties. Researchers are interested in harnessing these biologically sourced nanovesicles as powerful therapeutic tools with intrinsic bioactivity to help treat various orthopaedic diseases and defects. Recently, a new class of EV mimetics has emerged known as nanoghosts (NGs). These vesicles are derived from the plasma membrane of ghost cells, thus inheriting the surface functionalities and characteristics of the parent cell while at the same time allowing for a more standardized and reproducible production and significantly greater yield when compared to EVs. This study aims to investigate and compare the osteoinductive potential of MSC-EVs and MSC-NGs in vitro as novel tools in the field of bone tissue engineering and nanomedicine. To carry out this investigation, MSC-EVs were isolated from serum-free MSC conditioned media through differential ultracentrifugation. The remaining cells were treated with hypotonic buffer to produce MSC-ghosts that were then homogenized and serially extruded through 400 and 200 nm polycarbonate membranes to form the MSC-NGs. The concentration, size distribution, zeta potential, and protein content of the isolated nanoparticles were assessed. Afterwards, MSCs were treated with either MSC-EVs or MSC-NGs under osteogenic conditions, and their differentiation was assessed through secreted ALP assay, qPCR, and Alizarin Red mineralization staining. Isolation of MSC-EVs and MSC-NGs was successful, with relatively similar mean diameter size and colloidal stability. No effect on MSC viability and metabolic activity was observed with either treatment. Both MSC-EV and MSC-NG groups had enhanced osteogenic outcomes compared to the control; however, a trend was observed that suggests MSC-NGs as better osteoinductive mediators compared to MSC-EVs.Acknowledgements: The authors would like to acknowledge Canada Research Chair – Tier 1 in Regenerative Medicine and Nanomedicine, CHRP, and McGill's Faculty of Dental Medicine and Oral Health Sciences for their financial support.

The effects of standardized cannabis products in healthy volunteers and patients: a systematic literature review.

There is growing recognition of the potential of cannabis to treat various medical conditions and symptoms, such as chronic pain, spasticity, and epilepsy. However, one of the biggest challenges is the assurance of a standardized cannabis product that contains a consistent amount of its main psychoactive substances delta-9-tetrahydrocannabinol (THC) and cannabidiol (CBD), and which is compliant with predetermined specifications for these compounds. This is crucial not only to ensure consistent cannabis quality and dosage for patients but also to effectively translate research findings into clinical practice. This systematic literature review provides an overview of the effects of standardized cannabis products from Bedrocan, a leading Dutch producer of pharmaceutical-quality standardized medicinal cannabis. Cannabis administration to healthy volunteers induces dose-dependent acute effects, such as rapidly rising THC and CBD blood concentrations, the subjective experience of high and anxiety, slower reaction time and impaired attention, learning and working memory. Patient studies suggest that treatment with medicinal cannabis reduces pain intensity across a broad range of chronic pain-related medical conditions. Medicinal cannabis showed a mild safety profile, with minor and transient side effects, such as feeling high, coughing and mental confusion. The strength of acute effects, the experience of side effects and the drop-out rate in patient studies may depend on cannabis dose, cannabis composition (CBD:THC ratio), and cannabis use history of participants. Safety and efficacy of standardized medicinal cannabis products should be further investigated in randomized clinical trials with sufficient sample size, with particular focus on cannabis dose and composition, age and differences between males and females.

Effect of planting time and seedling feeding area on the yield and biochemical composition of leek (Allium porrum L.)

In the article, the results of the research carried out in order to study the effect of planting time and feeding area on the biochemical composition of leek (Allium porrum L.) are presented with an in-depth scientific analysis. Planting was done by hand in 4x1 cm rows in 7x40x60 cm boxes in the greenhouse on February 20, March 10, and April 1. Seedlings appeared after 10-12 days, on May 1 they were transplanted to open ground. This ensured that the seedlings were 70, 50, and 30 days old. Planting in open ground was carried out in a scheme of 50x10 cm. Harvesting took place on September 1-5. At the end of the research, the data analysis shows that by evaluating the nature of growth of false stem diameter in leek onion plants at different planting periods during the growing season, it can be noted that the feeding area for seedlings is larger and the seedlings when planted early, standard products had earlier maturity and higher product quality.

Моделі ціноутворення кредитних деривативів

Derivatives play an important role in the processes that take place in the global economy and economic growth. They are critical for hedging risks in the banking sector, managing the interest rate in the activities of pension funds, satisfying insurance claims for insurers and other market participants, i. e. reducing uncertainty arising from fluctuations in prices, credit rates, currency fluctuations, interest rates, etc. Today, they are actively used in the world practice of all industry sectors. The aim of the article is to develop pricing models for credit derivatives, taking into account the relationship between credit derivatives (CD) and structured credit products (SCP), as well as on the basis of identifying differences in the results of credit correlation of defaults, analyzing the evolutionary and essential characteristics of the CD and SCP markets. The authors systematized and classified them; their structural characteristics are provided; the main trends characteristic of the CD and SCP markets in the context of the markets of traditional derivatives are studied; the method of their design with the help of clinical documentation is determined; the major aspects of their modeling and pricing are considered, also an own credit product is designed and the spread is calculated using the pricing model. The article considers the problem of choosing an approach for assessing and calculating the correlation of defaults, which is an integral part of the pricing models of credit derivatives. On the basis of the given methodology for designing the SCP with the help of CD and the key aspects of modeling and pricing of CD and SCP, a basket credit default swap was designed on the basis of three corporate names. The designed product meets all the basic requirements for standard basket products in terms of content. The calculations were made based on the use of two different copulas to assess the correlation of defaults. The results can be used to design and evaluate a derivative on the correlation risk of issuers.

A BIM-based Framework for Quantifying Embodied Emissions from MEP Systems in Building Life Cycle Assessments

Embodied emissions from Mechanical, Electrical, and Plumbing systems (MEP) in buildings contribute substantially to the carbon footprint of buildings. Because of lack of standardized methods, reliable data, and environmental product declarations (EPD), MEP systems have typically been excluded from Life Cycle Assessments (LCAs). With increasing emission reduction efforts for other building components, the share of embodied emissions for MEP will rise if not focused on. This research fills the gap by introducing a comprehensive framework for quantifying embodied emissions for Mechanical and plumbing systems (MP). Our approach includes three main components: a BIM based embodied emissions calculation methodology, an EPD database, and guidelines for estimating emissions in data gaps. Seamless integration into the building information model (BIM) tool Revit, allows MEP designers to access real-time emissions data and engage in iterative design for reduced carbon footprint. Testing of the framework on a building in the design-stage indicates that emissions from replacement of components can constitute up to 50% of total material emissions for MP during the calculation period, that the emissions from MP can be in the order of 8-20 % of the total emissions from material use in a new office building and that ventilation, heating and fire suppression constitute the largest contribution to the total. Optimization of MP-solutions appears to offer substantial emission reduction.

Confronting dark matter freeze-in during reheating with constraints from inflation

We investigate the production of particle Dark Matter (DM) in a minimal freeze-in model considering a non-instantaneous reheating phase after inflation.We demonstrate that for low reheating temperatures, bosonic or fermionic reheating from monomial potentials can lead to a different evolution in the DM production and hence to distinct predictions for the parent particle lifetime and mass, constrained by long-lived particle (LLP) searches.We highlight that such scenario predictsparent particle decay lengths larger compared to using the instantaneous reheating approximation. Moreover, we demonstrate the importance of an accurate definition of the reheating temperature and emphasize its relevance for the correct interpretation of experimental constraints.We explore different models of inflation, which can lead to the considered reheating potential. We find that the extent to which the standard DM freeze-in production can be modified crucially depends on the underlying inflationary model. Based on the latest CMB constraints, we derive lower limits on the decay length of the parent particle and confront these results with the corresponding reach of LLP searches.Our findings underscore the impact of the specific dynamics of inflation on DM freeze-in production and highlight their importance for the interpretation of collider signatures.At the same time, our results indicate the potential for LLP searches to shed light on the underlying dynamics of reheating.