Fiber Level Research Articles

Techno-functional, antioxidants, microstructural, and sensory characteristics of biscuits as affected by fat replacer using roasted and germinated chickpea (Cicer arietinum L.)

ABSTRACT Obesity is one of the major causes of non-communicable diseases (NCDs) associated with a dietary pattern rich in saturated fat. The present study utilized roasted and germinated chickpeas (Cicer arietinum) flour (RCPF and GCPF) as a replacement for fat in biscuits, known to have nutraceutical properties. The fat content was modified using the following ratios: 10%, 20%, and 30% (w/w) of RCPF/GCPF. Based on the physicochemical analysis, increased concentrations of RCPF and GCPF in the flour blends resulted in higher levels of protein, ash, and crude fiber contents. GCPF was found to contain higher levels of protein (20.20%), ash (4.86%), and crude fiber (3.64%) compared to RCPF. Increased RCPF and GCPF levels resulted in reduction of gluten content, which indicated weak gluten network. Scanning electron micrographs (SEM) of biscuit samples further supported these observations. The farinograph properties showed significant increase (P<0.05) in water absorption and dough development time. Furthermore, when RCPF and GCPF were added to flour blends and biscuits samples, significant increase (P<0.05) in antioxidant activity, total phenolic content, and total flavonoid content was observed. These trends were observed to be more prominent with higher quantities of RCPF and GCPF. Notably, the antioxidant properties of chickpeas were found to be significantly improved (P<0.05) by the process of germination compared to roasting. Moreover, improvements in antioxidant activity might be caused by the increased levels of phenolic compounds and ascorbic acid due to the actions of endogenous hydrolytic enzymes during germination. The dimensional, textural, and sensory properties indicated that RCPF 20% and GCPF 10% can effectively serve as an organic fat substitute in bakery products with enhanced concentrations of proteins, fibers, antioxidants, and bioactive compounds with nutraceutical properties.

A combined pig model to determine the net absorption of volatile fatty acids in the large intestine under different levels of crude fiber.

This study aimed to develop a combined model to quantify the net absorption of volatile fatty acids (VFA) in the large intestine (LI) of pigs. Fifteen female growing pigs (Duroc × Large White × Landrace) were ranked by body weight (30 ± 2.1 kg) on day 0 and assigned to one of three treatments, namely the basal diet containing different crude fiber (CF) levels (LCF: 3.0% CF, MCF: 4.5% CF, and HCF: 6.0% CF). The pigs were implanted with the terminal ileum fistula and the cannulation of the ileal mesenteric vein (IMV), portal vein (PV), and left femoral artery (LFA) from days 6 to 7. [13 C]-Labeled VFA and P-aminohippuric acid were constantly perfused into the terminal ileum fistula and the cannulation of the IMV (day 15), respectively. Blood samples were collected from the PV and the LFA during perfusion (5 h), and LI samples were collected. The net flux of [12 C]-acetic acid in the PV was greater for LCF versus MCF (p = 0.045), but no difference was observed in the net flux of [12 C]-propionic acid (p = 0.505) and [12 C]-butyric acid (p = 0.35) in the PV among treatments. The deposition of [12 C]-acetic acid in the LI was greater for LCF versus MCF (p = 0.014), whereas the deposition of [12 C]-propionic acid (p = 0.007) and [12 C]-butyric acid (p = 0.037) in the LI was greater for LCF versus HCF. In conclusion, this pig model was found conducive to study the net absorption of VFAs in the LI, and LCF had more net absorption of VFAs in the LI than MCF and HCF.

An Experimental Study on fiber Reinforced Hybrid Concrete

In this project modified hybrid concrete- a novel construction material is manufactured with fibers (steel fibers, polypropylene fibers) and silica fume by drilling through the cement and mortar in order to develop a high strength concrete. The main purpose is to develop a concrete with improved physical and mechanical properties. Experiments to study the mechanical properties of the hybrid concrete were carried out. The present study aims at producing the concrete specimen by reinforcing constant level of fibers (steel fibers of 0.7%, and polypropylene fibers of 0.3%) with the different percentage (5%, 10%, 15% and 20%) of silica fume and then comparing it with normal and fiber reinforced concrete. Different tests were carried out on the hybrid concrete specimen like compressive strength test, flexural strength test, and durability tests on normal concrete. The result obtained from the above tests were supreme than the normal concrete, the hybrid concrete exhibits series of cracks while loading and also has higher flexural and compressive strength than the normal concrete.

Formulasi biskuit tepung tempe biji kedawung (Parkia roxburghii G. Don) untuk pasien diabetes melitus

Formulations of biscuits from kedawung seed tempeh flour (Parkia roxburghii G. Don) for diabetes mellitus patientsBackground: Diabetes mellitus (DM) is a metabolic disease characterized by hyperglycemia. Blood glucose can be controlled with food consumption with low glycaemic index (GI) and glycaemic load (GL) values. Kedawung seeds contain high protein and fiber and can be an alternative to low GI and GL food sources for DM patients. Objectives: This research analyzed total protein, crude fiber, glycaemic index, and glycaemic load levels from biscuits by substituting kedawung seed tempeh flour.Methods: The study was an experimental study with four treatments. The substitution of kedawung seed tempeh flour in biscuits was 0%, 10%, 30%, and 50%. Protein content was analyzed using the Kjeldahl method, and crude fiber was analyzed using the gravimetric method. Statistical analysis was done using the One Way ANOVA and Tukey posthoc test. A hedonic test on 25 semi-trained panelists was conducted to determine the best formulation, and the results were analyzed using the Kruskal Walls and Friedman post-hoc test. IAUC analyzed the glycaemic index from 10 respondents. Results: Biscuits substituting kedawung seed tempe flour affected protein content (p=0.00) and crude fiber (p=0.00). The best acceptance was biscuits with a 10% substitution of kedawung seed tempeh flour, which has a 32.28% glycemic index value and a 9.98% glycemic load. Conclusions: The biscuits substituting kedawung seed tempeh flour significantly increased protein and crude fiber content. Biscuit formulation with 10% kedawung seed tempeh flour had a low glycemic index and glycemic load.

Dietary Effect on Milk Composition in Different Dairy Cattle Farms in Chattogram Metropolitan Area

In the dairy industry milk is the most valuable product. The market value of milk depends on the amount of yield and content of fat in milk. Breed or genetic factors are mostly correlated with the production rate and fat content in milk. For example, Jersey breed cattle have the highest fat and protein percentage in milk than other breeds. But the quality of milk also depends on other dietary factors such as crude fiber and crude protein content of the diet. Fermentation of crude fiber in the rumen produces large amounts of acetic acid and butyric acid which act as a derivative of milk fat. Milk protein concentration depends on the crude protein level in the diet. In this study milk and feed samples were collected from eight dairy farms at Chattogram Metropolitan Area to investigate the dietary effect on milk composition. The highest fat, SNF percentage, and protein percentage of the milk sample were founded in the case of the Munna dairy farm in which the crude fiber level and crude protein level of the feed sample were higher than other dairy farms. The lowest fat, SNF percentage, and protein percentage of the milk sample were founded in the case of the Moinuddin dairy farm in which the crude fiber level of the feed sample was lowest but the level of crude protein in the feed sample was near to Munna dairy farm. A better amount of crude protein in the feed sample was founded in the case of the Moinuddin dairy farm. But due to mastitis and a poor management system, the protein content of milk in this farm was poor.

Effect of Mixing Peanut Vine on Fermentation Quality, Nitrogen Fraction and Microbial Community of High-Moisture Alfalfa Silage

Fresh alfalfa is difficult to ensile successfully because of its high moisture content and greater susceptibility to spoilage by Clostridia, Bacilli or Enterobacter. In this study, we evaluated the effects of mixing high-moisture alfalfa with peanut vine in different proportions on the bacterial communities and fermentation characteristics of silage. The high-moisture alfalfa and peanut vine were mixed at ratios of 10:0 (CK), 8:2 (TI), 7:3 (T2), 6:4 (T3) and 5:5 (T4), respectively. For each treatment, silos (25 × 35 cm) were anaerobically fermented in darkness at room temperature and analyzed after 45 days. The results showed that the CK silage was weakly fermented, as indicated by a low lactic acid concentration, a high pH value, and high levels of propionic acid (PA), butyric acid (BA) and ammonia nitrogen (NH3-N). As the proportion of peanut vine in the mixture increased, the pH level decreased, and levels of BA, propionic acid, NH3-N, crude protein(CP), nonprotein nitrogen and soluble protein also declined (p &lt; 0.05), while the lactic acid concentration increased and levels of neutral detergent fiber (NDF) and water-soluble carbohydrates (WSC) also rose (p &lt; 0.05). A protein component analysis of silage mixtures using the Cornell Net Carbohydrate and Protein System (CNCPS) showed that the content of the nonprotein nitrogen component (PA) decreased when the proportion of peanut vine increased, whereas the content of rapidly degraded protein (PB1) increased. Mixing with peanut vine also influenced the distribution of the bacterial community. Compared with the CK silage, the relative abundances of Enterococcus, Garciella and Anaerosporobacter in T2, T3 and T4 were significantly lower, while the relative abundance of Lactobacillus was significantly higher. In the T2, T3 and T4 groups, Garciella and Anaerosporobacter were not detected. In summary, in this study, we ensiled high-moisture alfalfa, which was weakly fermented. We found that mixing with peanut vine improved fermentation quality and optimized the structure of the bacterial community. Therefore, to improve the fermentation quality and nutritional value of silage, high-moisture alfalfa should be ensiled with at least 30% peanut vine.

Impact of Polyhouse on Production Potential of Bitter Gourd in Off-season

In Bangladesh, the bitter gourd, which is a vegetable, is a wonderful source of magnesium, folate, zinc, phosphorus, and vitamins B1, B2, and B3. It also contains a high level of dietary fiber. From December 2020 to April 2021, an experiment was carried out in the field laboratory of Bangladesh Agricultural University, Mymensingh, to determine how the polyhouse and the local environment affected the growth and yield of bitter gourd during the off-season. It was a factorial experiment using RCBD (Randomized Completely Block Design), in which Factor A represented the impact of a polyhouse and Factor B represented the influence of the environment on the development and yield of bitter gourd during the off-season. Results showed that photochemically active radiation decreased within the polyhouse compared to the open area outside. In terms of soil temperature, soil moisture, and air temperature, a reverse trend was seen. In comparison to an open field during the winter, the polyhouse had higher air, soil, and soil moisture temperatures. Compared to plants cultivated in open fields, bitter gourd plants planted in poly houses had longer stems, more branches, blooms, and higher reproductive efficiency, which led to more fruit setting plants-1 and a higher fruit yield. Additionally, the fruit size in the polyhouse was greater than it was in the open field situation. In comparison to open fields, the fruit output of bitter gourd was approximately 2.5 times higher in polyhouses, which will be helpful to meet up the nutritional demand in the off-season.

Mechanical properties and microscopic characteristics of steel fiber coal gangue concrete

Incorporation of coal gangue in the concrete mixes can realize utilization of the solid waste and reduce extraction/use of natural aggregates. To improve the mechanical properties of coal gangue concrete, this paper studies use of steel fibre together with coal gangue coarse aggregate, coal gangue fine aggregate/sand in various concrete mixes. The effect of volume dosages of steel fibre and different levels of replacing nature coarse aggregate and river sand with coal gangue aggregates on concrete compressive strength was first investigated. Then, a design of experiment using orthogonal test was adopted to study concrete mixes with 3 factors, namely, coal gangue coarse aggregate, coal gangue sand and steel fibre, and each at 3 levels. Through multidimensional statistical data analysis of the test results, the primary and secondary factors and the optimal composition of the steel fibre reinforced coal gangue concrete were identified, and a grey prediction model for compressive strength of the concrete mixes established. The microstructural characteristics and failure mechanism of steel fiber reinforced coal gangue concrete was also studied and discussed.

Comparative growth performance, gizzard weight, ceca digesta short chain fatty acids and nutrient utilization in broiler chickens and turkey poults in response to cereal grain type, fiber level, and multienzyme supplement fed from hatch to 28 days of life

Growth performance, gizzard weight, ceca digesta short-chain fatty acids (SCFA), and apparent retention (AR) of components were investigated in broilers and turkeys in response to cereal grain type, fiber level, and multienzyme supplement (MES) fed from hatch to 28 d of life. 480-day-old male broiler chicks and equal number of turkeys were placed separately in metabolism cages (10 birds/cage) and allocated to 8 diets. The species-specific diets were a corn or wheat-based basal diet without (LF) or with 10% corn DDGS or wheat middlings (HF) and fed without or with MES. This effectively created a 2 (grain types)×2 (fiber levels)×2 (MES) factorial arrangement of treatments. The diets had TiO2 as an indigestible marker. Body weight, feed intake, and mortalities were recorded to calculate body weight gain (BWG) and feed conversion ratio (FCR). Excreta samples were collected on d 25 to 27 for AR, and all birds were necropsied for gizzard weight and ceca digesta on d 28. The interaction between grain and MES in broilers was such that wheat diets with MES had the lowest (P=0.005) FCR. In broilers, LF diets had better (P=0.010) FCR than HF diets. The wheat diets had the highest (P=0.006) concentration of butyric acid in broilers. Broilers fed HF and corn diets had heavier gizzard than broilers-fed LF and wheat diets. The MES improved (P < 0.05) AMEn in HF, corn, and wheat diets in broilers. The turkeys fed wheat diets had the lowest (P=0.019) FCR. Turkeys fed HF wheat diets had the heaviest (P < 0.001) gizzard. In turkeys, the MES improved AMEn in HF and LF corn diets, and only in LF wheat diets compared to respective controls. Treatments had no effect on turkeys cecal SCFA. In conclusion, grain type, fiber, and MES did not affect growth in both species. However, species exhibited differing FCR, gizzard, and energy utilization to fiber and MES.

The effect of fatty infiltration, revision surgery, and sex on lumbar multifidus passive mechanical properties.

Previous research has demonstrated increased stiffness in the multifidus muscle compared to other paraspinal muscles at the fiber bundle level. We aimed to compare single fiber and fiber bundle passive mechanical properties of multifidus muscle: (1) in 40 patients undergoing primary versus revision surgery and (2) in muscle with mild versus severe fatty infiltration. The degree of muscle fatty infiltration was graded using the patients' spine magnetic resonance images. Average single fiber and fiber bundle passive mechanical properties across three tests were compared between primary (N = 30) and revision (N = 10) surgery status, between mild and severe fatty infiltration levels, between sexes, and with age from passive stress-strain tests of excised multifidus muscle intraoperative biopsies. At the single fiber level, elastic modulus was unaffected by degree of fatty infiltration or surgery status. Female sex (p = 0.001) and younger age (p = 0.04) were associated with lower multifidus fiber elastic modulus. At the fiber bundle level, which includes connective tissue around fibers, severe fatty infiltration (p = 0.01) and younger age (p = 0.06) were associated with lower elastic modulus. Primary surgery also demonstrated a moderate, but non-significant effect for lower elastic modulus (p = 0.10). Our results demonstrate that female sex is the primary driver for reduced single fiber elastic modulus of the multifidus, while severity of fatty infiltration is the primary driver for reduced elastic modulus at the level of the fiber bundle in individuals with lumbar spine pathology.

Influence of Staphylococcus epidermidis on Collagen Crimp Patterns of Soft Tissue Allograft

Background: Postoperative infections, commonly from Staphylococcus epidermidis, may result in anterior cruciate ligament graft failure and necessitate revision surgery. In biomechanical studies, S. epidermidis has been shown to establish biofilms on tendons and reduce graft strength. Purpose/Hypothesis: The goal of this study was to determine the effect of bacterial bioburden on the collagen structure of tendon. It was hypothesized that an increase in S. epidermidis biofilm would compromise tendon crimp, a pattern necessary for mechanical integrity, of soft tissue allografts. Study design: Controlled laboratory study. Methods: Cultures of S. epidermidis were used to inoculate tibialis anterior cadaveric tendons. Conditions assessed included 5 × 105 colony-forming units or concentrated spent media from culture (no living bacteria). Incubation times of 30 minutes, 3 hours, 6 hours, and 24 hours were utilized. Second-harmonic generation imaging allowed for visualization of collagen autofluorescence. Crimp lengths were determined using ImageJ and compared based on incubation time. Results: Incubation time positively correlated with increasing S. epidermidis bioburden. Both fine and coarse crimp patterns lengthened with increasing incubation time. Significant coarse crimp changes were observed after only 30-minute incubations (P < .029), whereas significant fine crimp lengthening occurred after 6 hours (P < .0001). No changes in crimp length were identified after incubation in media lacking living bacteria. Conclusion: The results of this study demonstrate that exposure to S. epidermidis negatively affects collagen crimp structure. Structural alterations at the collagen fiber level occur within 30 minutes of exposure to media containing S. epidermidis. Clinical Relevance: Our study highlights the need for antimicrobial precautions to prevent graft colonization and maximize graft mechanical strength.

Reactions of Finger Millet (Eleusine coracana (L.) Gaertn) Genotypes for Blast Resistance and Yield in Wukari and Takum Taraba State, Nigeria

Finger millet contains high level of methionine, tryptophan, vitamin B, fibre and minerals such as phosphorus, iron, calcium, which serve a good source of balance diet formulations for hypertension, obesity, diabetic patients, pregnant women, nursing mothers, children, people leaving with HIV, malnourished people, incidence of iron deficiency (anemia), and calcium deficiency causing rickets in young children. Production constraints responsible for the low yields have been identified as pests, blast and Striga, drought, low soil fertility, labor intensity, high weed infestation, low yielding varieties, lodging, and poor attitude to the crop. Finger millet blast about 50% yield losses. This disease has been identified as the highest priority constraint to finger millet production in Nigeria, since most landraces and a number of other genotypes are highly susceptible. Field trials were conducted on 22 germplasm (U 15, P224, ACC 32, ACC14, KNE814, IE 3779, KNE 628, KNE 688, KNE 1149, Etiyo Brown, Gulu E, Kala, RW 127(IE 6613), KNE 392, GBK 029681, ACC 3953, GBK 011136A, KNE 689, KNE 1034, Emiroit, Red local check and Black local check) from ICRISAT and farmers in 3 replicates at Wukari and Takum in 2019, to assess for blast disease resistance and yield. A significant negative correlation (0.52) was found between blast severity and DF (days to flowering) suggesting that late/medium flowering varieties are more resistant than the early ones as indicated by genotypes KNE814, IE 3779, KNE 628, KNE 688, KNE 1149, Gulu E,, KNE 392, GBK 029681, ACC 3953, GBK 011136A, KNE 689, KNE 1034, Emiroit and Red (local check) varieties, which were medium maturing and highly resistance to blast disease, with foliar blast severity (1.07 - 3.0), neck blast (1.5 - 2.5) and finger blast (11 - 25 %), NET (3.45 - 4.38), NFPH (5.80) and subsequently highest yield (1565 - 1887 kg/ha), compared to black local variety with the highest foliar blast severity (4.00 - 6.70), neck blast (2.7 - 4.40), finger blast (32 - 36 %), NET (2.50 - 2.70), NFPH (3.30 - 4.70) and lowest yield (688 - 989 kg/ha), respectively in Wukari and Takum locations. Hence, these varieties resistant to foliar, neck, finger blast diseases, good yield parameters are recommended as sources of germplasm for genetic improvement and further research.

Reactions of Finger Millet (Eleusine coracana (L.) Gaertn) Genotypes for Blast Resistance and Yield in Wukari and Takum Taraba State, Nigeria

Finger millet contains high level of methionine, tryptophan, vitamin B, fibre and minerals such as phosphorus, iron, calcium, which serve a good source of balance diet formulations for hypertension, obesity, diabetic patients, pregnant women, nursing mothers, children, people leaving with HIV, malnourished people, incidence of iron deficiency (anemia), and calcium deficiency causing rickets in young children. Production constraints responsible for the low yields have been identified as pests, blast and Striga, drought, low soil fertility, labor intensity, high weed infestation, low yielding varieties, lodging, and poor attitude to the crop. Finger millet blast about 50% yield losses. This disease has been identified as the highest priority constraint to finger millet production in Nigeria, since most landraces and a number of other genotypes are highly susceptible. Field trials were conducted on 22 germplasm (U 15, P224, ACC 32, ACC14, KNE814, IE 3779, KNE 628, KNE 688, KNE 1149, Etiyo Brown, Gulu E, Kala, RW 127(IE 6613), KNE 392, GBK 029681, ACC 3953, GBK 011136A, KNE 689, KNE 1034, Emiroit, Red local check and Black local check) from ICRISAT and farmers in 3 replicates at Wukari and Takum in 2019, to assess for blast disease resistance and yield. A significant negative correlation (0.52) was found between blast severity and DF (days to flowering) suggesting that late/medium flowering varieties are more resistant than the early ones as indicated by genotypes KNE814, IE 3779, KNE 628, KNE 688, KNE 1149, Gulu E,, KNE 392, GBK 029681, ACC 3953, GBK 011136A, KNE 689, KNE 1034, Emiroit and Red (local check) varieties, which were medium maturing and highly resistance to blast disease, with foliar blast severity (1.07 - 3.0), neck blast (1.5 - 2.5) and finger blast (11 - 25 %), NET (3.45 - 4.38), NFPH (5.80) and subsequently highest yield (1565 - 1887 kg/ha), compared to black local variety with the highest foliar blast severity (4.00 - 6.70), neck blast (2.7 - 4.40), finger blast (32 - 36 %), NET (2.50 - 2.70), NFPH (3.30 - 4.70) and lowest yield (688 - 989 kg/ha), respectively in Wukari and Takum locations. Hence, these varieties resistant to foliar, neck, finger blast diseases, good yield parameters are recommended as sources of germplasm for genetic improvement and further research.

A Practical and Hierarchical Yarn‐based Shading Model for Cloth

AbstractRealistic cloth rendering is a longstanding challenge in computer graphics due to the intricate geometry and hierarchical structure of cloth: Fibers form plies which in turn are combined into yarns which then are woven or knitted into fabrics. Previous fiber‐based models have achieved high‐quality close‐up rendering, but they suffer from high computational cost, which limits their practicality. In this paper, we propose a novel hierarchical model that analytically aggregates light simulation on the fiber level by building on dual‐scattering theory. Based on this, we can perform an efficient simulation of ply and yarn shading. Compared to previous methods, our approach is faster and uses less memory while preserving a similar accuracy. We demonstrate both through comparison with existing fiber‐based shading models. Our yarn shading model can be applied to curves or surfaces, making it highly versatile for cloth shading. This duality paired with its simplicity and flexibility makes the model particularly useful for film and games production.

Review: Nutrient and energy supply in monogastric food producing animals with reduced environmental and climatic footprint and improved gut health.

With more efficient utilisation of dietary nutrients and energy, diversified production systems, modifications of diet composition with respect to feedstuffs included and the use of free amino acids, the negative impact of animal food production on the environment and climate can be reduced. Accurate requirements for nutrients and energy for animals with differing physiological needs, and the use of robust and accurate feed evaluation systems are key for more efficient feed utilisation. Data on CP and amino acid requirements in pigs and poultry indicate that it should be possible to implement indispensable amino acid-balanced diets with low- or reduced-protein content without any reduction in animal performance. Potential feed resources, not competing with human food security, can be derived from the traditional food- and agroindustry, such as various waste streams and co-products of different origins. In addition, novel feedstuffs emerging from aquaculture, biotechnology and innovative new technologies may have potential to provide the lack of indispensable amino acids in organic animal food production. High fibre content is a nutritional limitation of using waste streams and co-products as feed for monogastric animals as it is associated with decreased nutrient digestibility and reduced dietary energy values. However, minimum levels of dietary fibre are needed to maintain the normal physiological function of the gastro-intestinal tract. Moreover, there may be positive effects of fibre in the diet such as improved gut health, increased satiety, and an overall improvement of behaviour and well-being.

The Effect of Red Potato Pulp Preparation and Stage of Its Incorporation into Sourdough or Dough on the Quality and Health-Promoting Value of Bread

The quality and health-promoting properties of enriched bread depend not only on the composition of the additive but also on the baking technology. In this study, the preparation (rice flour, maltodextrin, and red potato pulp) was used in the amount of 5% of the flour in the recipe at various stages of bread production, i.e., during sourdough fermentation or dough kneading. The aim of the study was to analyze the effect of adding the preparation containing red potato pulp on the content of polyphenols and the ability to neutralize free radicals, nutritional composition, physical parameters, and quality of wheat–rye bread using two different baking technologies. The preparations made with red potato pulp are an excellent source of bioactive compounds. The breads with preparations added to the sourdough were characterized by greater volume and lower hardness, and higher levels of minerals and dietary fiber than breads with preparations added to the dough. It was found that the breads with preparations added to the dough were characterized by up to 4.5 times more polyphenols, 3.5 times more flavonoids, and 6 times more phenolic acids and flavonols than breads with preparations added to sourdough, which translated into their greater antioxidant potential.

Baseline Study on Microplastic Distribution in the Open Surface Waters of the Korean Southwest Sea

This study investigated microplastic distribution characteristics by collecting surface seawater from sea areas to the south of Jeju Island in August 2020. The average microplastic abundance was 0.46 ± 0.27 particles/L (n = 23), and PE had a high ratio, averaging 53%. The levels of fragments and fibers were observed to be 69% and 31% on average, respectively. The most common size of the microplastics was on average 0.02–0.30 mm at a level of 69%. We found a higher abundance of microplastics in the study area than in other open waters such as the Arctic Central Basin and the Atlantic Ocean, whereas the abundance was lower than that in previous studies on coastal areas. We studied an area of open sea connecting China, Japan, and the Pacific Ocean, and, in this region, the microplastic distribution varies depending on sea currents in the surrounding areas. In the summer, the western and central regions of the study sea area have low salinity levels due to discharge from China’s Yangtze River. This generally indicates that high-density plastic deposits are found in the Yangtze River estuary, and low-density plastics are found in the study area. Furthermore, this implies that low- and high-density plastics are transported in water for long periods of time due to the Taiwan Warm Current and because the eastern sea area has high salinity.

A Comparative Study of Skin Changes in Different Species of Mice in Chronic Photoaging Models.

This study aimed to design a novel mouse model of chronic photoaging. We used three different species of mice (C57BL/6J, ICR, and KM) to create a chronic photoaging model of the skin. The irradiation time was gradually increased for 40 consecutive days. The skins of the mice were removed on day 41 and subjected to staining to observe them for morphological changes. Immunohistochemistry was used to detect tumor necrosis factor-α (TNF-α) and p53 expression; superoxide dismutase (SOD) and malondialdehyde (MDA) were measured as well. Compared with C57BL/J mice, which showed hyperpigmentation, the irradiated skin of ICR and KM mice showed more obvious skin thickening and photoaging changes of the collagen and elastic fibers. KM mice had higher levels of inflammation, oxidative stress, and senescent cells. Compared with the 5-month-old KM mice, the photoaging changes of the 9-month-old KM mice were more pronounced, the SOD values were lower, and the MDA values were higher. In summary, KM mice have higher levels of abnormal elastic fibers, inflammation, cellular senescence, and oxidative stress than ICR mice, and are more suitable for studies related to chronic skin photoaging. C57BL/6J mice were found to be suitable for studies related to skin pigmentation due to photoaging.

Parametric 3D simulations of spun yarns and fabrics

Yarns and fabrics usually have regular structures such as periodic patterns as well as irregular texture such as surface hairiness. To improve the accuracy of fabric simulation, a fibre and yarn level parametric modelling method based on the Rhino&Grasshopper package was developed in this study. The geometric and structural characteristics of fibre and spun yarn were analysed. The fibre cross-section shape, packing distribution, and yarn hairiness were established to build a three-dimensional yarn model first. Then, realistic simulation of a woven fabric was carried out, incorporating yarn hairiness features for the first time. The results show that the fibre to fabric parametric modelling method based on Rhino&Grasshopper has high fidelity and broad application prospects.

Isolation and Extraction of Monomers from Insoluble Dietary Fiber.

Insoluble dietary fiber is a macromolecular polysaccharide aggregate composed of pectin, glycoproteins, lignin, cellulose, and hemicellulose. All agricultural by-products contain significant levels of insoluble dietary fiber. With the recognition of the increasing scarcity of non-renewable energy sources, the conversion of single components of dietary fiber into renewable energy sources and their use has become an ongoing concern. The isolation and extraction of single fractions from insoluble dietary fiber is one of the most important recent research directions. The continuous development of technologies for the separation and extraction of single components is aimed at expanding the use of cellulose, hemicellulose, and lignin for food, industrial, cosmetic, biomedical, and other applications. Here, to expand the use of single components to meet the new needs of future development, separation and extraction methods for single components are summarized, in addition to the prospects of new raw materials in the future.