Prakash, Amruta’s team published research in Fuel in 304 | CAS: 121-79-9

Fuel published new progress about 121-79-9. 121-79-9 belongs to esters-buliding-blocks, auxiliary class Natural product, name is Propyl 3,4,5-trihydroxybenzoate, and the molecular formula is C10H12O5, Quality Control of 121-79-9.

Prakash, Amruta published the artcileUltraviolet induced random mutagenesis in Bacillus amyloliquefaciens (MF 510169) for improving biodiesel production, Quality Control of 121-79-9, the publication is Fuel (2021), 121380, database is CAplus.

The present study aims to mutate Bacillus amyloliquefaciens (MF 510169) randomly for improving lipid accumulation towards green and efficient transformation of bacterial oil into biodiesel. The cellular lipid content of wild type Bacillus strain is improved by exposing the strain to UV light at 254 nm (UV-C) and 365 nm (UV-A) wavelengths for different time intervals from 20 to 380 s. A remarkable increase in lipid content is noted with increase in cell dry weight when exposed to UV-C with 320 s exposure time. The accumulated lipids are extracted and transesterified through acid catalyst (H2SO4, 1.52%) by various means for biodiesel production The chem. profiling of thus obtained biodiesel has been done by employing various spectroscopic techniques. The phys. and chem. properties of thus transesterified biodiesel are well-matching 86-90% with International ASTM standards The antioxidant stability of produced biodiesel tested with an addition of synthetic antioxidants remains stable for 25 d.

Fuel published new progress about 121-79-9. 121-79-9 belongs to esters-buliding-blocks, auxiliary class Natural product, name is Propyl 3,4,5-trihydroxybenzoate, and the molecular formula is C10H12O5, Quality Control of 121-79-9.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Paliwal, Chetan’s team published research in Chemical Engineering Journal (Amsterdam, Netherlands) in 418 | CAS: 121-79-9

Chemical Engineering Journal (Amsterdam, Netherlands) published new progress about 121-79-9. 121-79-9 belongs to esters-buliding-blocks, auxiliary class Natural product, name is Propyl 3,4,5-trihydroxybenzoate, and the molecular formula is C10H12O5, Application of Propyl 3,4,5-trihydroxybenzoate.

Paliwal, Chetan published the artcileDynamic allocation of carbon flux triggered by task-specific chemicals is an effective non-gene disruptive strategy for sustainable and cost-effective algal biorefineries, Application of Propyl 3,4,5-trihydroxybenzoate, the publication is Chemical Engineering Journal (Amsterdam, Netherlands) (2021), 129413, database is CAplus.

Chem. mols. such as butylated hydroxyanisole (CBHA), Pr gallate (CPG), and acetylcholine (CACH) enhance cell growth and/or lipid productivities effectively at the nanomolar concentration (100 nM) in microalgae Scenedesmus dimorphus UTEX1237. The biomass and lipid productivities were improved by 11% (181.60 ± 1.94 mgL-1d-1) and 48% (18.71 ± 0.20 mgL-1d-1), resp., with biomass yields reaching up to 2 g L-1 in CBHA-treated cells compared to Control (Co; 163.62 ± 1.57 mgL-1d-1). In contrast, CACH-treated cells have 41.38% (33.04 ± 0.30 mgL-1d-1), 25.24% (15.88 ± 0.14 mgL-1d-1) and 117% (4.38 ± 0.00μgL-1d-1) higher productivities of carbohydrates, lipids, and tocopherols, resp. compared to Co. However, optimum proteins have been observed in forskolin (CFORS) treatment (59.15 ± 1.83 mgL-1 d-1). The metabolomic anal. illustrates the role of CBHA in the rerouting of carbon flux towards lipids and/or sterols, by enhancing the accumulation of glycolysis-based metabolite, namely acetic acid. At the same time, CACH downregulates it by improving pyruvic acid. In contrast, a citric acid cycle metabolite 2-ketoglutaric acid is downregulated in CACH. These modulators target specific pathways in a given condition to initiate the biosynthesis of metabolites. For instance, Brefeldin (CBREF), Jasmonic acid (CJA), and CACH showed enhancement in total tocopherols and β-carotene. In contrast, all other modulators except CBHA and CACH were also involved in increasing the total carotenoid productivity. Henceforth, such media engineering perspective demonstrates the utilization of specific chems. to dynamically divert the carbon flux towards the biosynthesis of unique metabolites, an effective non-gene disruptive strategy for sustainable and cost-effective algal biorefineries.

Chemical Engineering Journal (Amsterdam, Netherlands) published new progress about 121-79-9. 121-79-9 belongs to esters-buliding-blocks, auxiliary class Natural product, name is Propyl 3,4,5-trihydroxybenzoate, and the molecular formula is C10H12O5, Application of Propyl 3,4,5-trihydroxybenzoate.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Brink, Madri’s team published research in Animal Nutrition in 9 | CAS: 121-79-9

Animal Nutrition published new progress about 121-79-9. 121-79-9 belongs to esters-buliding-blocks, auxiliary class Natural product, name is Propyl 3,4,5-trihydroxybenzoate, and the molecular formula is C10H12O5, Safety of Propyl 3,4,5-trihydroxybenzoate.

Brink, Madri published the artcileReduction of dietary crude protein and feed form: Impact on broiler litter quality, ammonia concentrations, excreta composition, performance, welfare, and meat quality, Safety of Propyl 3,4,5-trihydroxybenzoate, the publication is Animal Nutrition (2022), 291-303, database is CAplus and MEDLINE.

Nitrogen (N) excreted by poultry is converted to ammonia (NH3), presenting an environmental risk and a health risk to the farmer and animals. A study was performed to investigate the effect of reduced CP and feed form on broiler performance and welfare, meat and litter quality, N utilization, and NH3 concentrations at litter level. A total of 2,232 Ross 308 male broilers was divided into 6 treatments and 6 replicates, which was fed diets in both pellet and mash forms with different CP levels of 205.0 g/kg (H, high), 187.5 g/kg (M, intermediate) and 175.0 g/kg (L, low) in the grower phase and 195.0 g/kg (H), 180.0 g/kg (M) and 165.6 g/kg (L) in the finisher phase. Individual amino acids (AA) were supplemented to maintain digestible AA-to-digestible lysine ratios. Decreasing dietary CP content to 187.5 g/kg in the grower phase and 180.0 g/kg in the finisher phase reduced NH3 concentrations at litter level (P < 0.001), but a further reduction in dietary CP had no addnl. effect. Mash treatments had better litter qualities and lower incidences of foot and hock lesions than pellet treatments at d 38 (P < 0.001). In addition, treatments with reduced CP had lower incidence of foot lesions at d 38 (P < 0.001). Broilers fed pelleted diets had higher ADFI, ADG, and final BW, improved feed conversion ratio (FCR), and heavier carcasses (P < 0.001) than those fed mash diets over a production period of 39 d. Performance could not be maintained when birds were fed L CP pelleted diets. This study demonstrated that, with the supplementation of AA to meet requirements, the concentration of dietary CP can be reduced to 187.5 and 180.0 g/kg in the grower and finisher phases resp., without impairing broiler performance, meat yield and quality. Mash diets were favorable when considering the overall litter quality and welfare of the birds. However, they could not maintain the same broiler performance and slaughter yield as pelleted diets. Results from the present study may assist the poultry sector towards a socially acceptable low-emission farming system.

Animal Nutrition published new progress about 121-79-9. 121-79-9 belongs to esters-buliding-blocks, auxiliary class Natural product, name is Propyl 3,4,5-trihydroxybenzoate, and the molecular formula is C10H12O5, Safety of Propyl 3,4,5-trihydroxybenzoate.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Takagi, Daisuke’s team published research in Scientific Reports in 11 | CAS: 121-79-9

Scientific Reports published new progress about 121-79-9. 121-79-9 belongs to esters-buliding-blocks, auxiliary class Natural product, name is Propyl 3,4,5-trihydroxybenzoate, and the molecular formula is C24H26ClNO4, SDS of cas: 121-79-9.

Takagi, Daisuke published the artcileManganese toxicity disrupts indole acetic acid homeostasis and suppresses the CO2 assimilation reaction in rice leaves, SDS of cas: 121-79-9, the publication is Scientific Reports (2021), 11(1), 20922, database is CAplus and MEDLINE.

Despite the essentiality of Mn in terrestrial plants, its excessive accumulation in plant tissues can cause growth defects, known as Mn toxicity. Mn toxicity can be classified into apoplastic and symplastic types depending on its onset. Symplastic Mn toxicity is hypothesised to be more critical for growth defects. However, details of the relationship between growth defects and symplastic Mn toxicity remain elusive. In this study, we aimed to elucidate the mol. mechanisms underlying symplastic Mn toxicity in rice plants. We found that under excess Mn conditions, CO2 assimilation was inhibited by stomatal closure, and both carbon anabolic and catabolic activities were decreased. In addition to stomatal dysfunction, stomatal and leaf anatomical development were also altered by excess Mn accumulation. Furthermore, indole acetic acid (IAA) concentration was decreased, and auxin-responsive gene expression analyses showed IAA-deficient symptoms in leaves due to excess Mn accumulation. These results suggest that excessive Mn accumulation causes IAA deficiency, and low IAA concentrations suppress plant growth by suppressing stomatal opening and leaf anatomical development for efficient CO2 assimilation in leaves.

Scientific Reports published new progress about 121-79-9. 121-79-9 belongs to esters-buliding-blocks, auxiliary class Natural product, name is Propyl 3,4,5-trihydroxybenzoate, and the molecular formula is C24H26ClNO4, SDS of cas: 121-79-9.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Kiselevsky, Dmitry B.’s team published research in Biochemistry (Moscow) in 87 | CAS: 121-79-9

Biochemistry (Moscow) published new progress about 121-79-9. 121-79-9 belongs to esters-buliding-blocks, auxiliary class Natural product, name is Propyl 3,4,5-trihydroxybenzoate, and the molecular formula is C10H12O5, Quality Control of 121-79-9.

Kiselevsky, Dmitry B. published the artcileInvestigation of the Antioxidant Properties of the Quaternized Chitosan Modified with a Gallic Acid Residue Using Peroxidase that Produces Reactive Oxygen Species, Quality Control of 121-79-9, the publication is Biochemistry (Moscow) (2022), 87(2), 141-149, database is CAplus and MEDLINE.

Chitosan modified with a (2-hydroxy-3-trimethylammonium) Pr group and gallic acid residue, or quaternized chitosan with gallic acid (QCG), was synthesized. Antioxidant properties of the produced QCG have been investigated. Peroxidase in combination with NADH and salicyl hydroxamate (SHAM) caused consumption of oxygen and production of H2O2 in aqueous solution as a result of O2 reduction in the peroxidase-oxidase reactions. The rates of O2 consumption and H2O2 generation were reduced in the presence of QCG. The antioxidant Pr gallate (PG) and superoxide dismutase (SOD) had the same effect, but not the quaternized chitosan (QC) without gallic acid. The effect of chitosan derivatives on the production of reactive oxygen species (ROS) in the cells of pea leaf epidermis and on the cell death detected by the destruction of cell nuclei, was investigated. The QCG, QC, and SOD had no effect, while PG decreased the rate of ROS generation in the cells of the epidermis, which was induced by NADH with SHAM or by menadione. The QCG and QC prevented destruction of the guard cell nuclei in the pea leaf epidermis that was caused by NADH with SHAM or by KCN. The SOD had no effect on the destruction of nuclei, while the effect of PG depended on the inducer of the cell death. Suppression of the destruction of guard cell nuclei by chitosan derivatives was associated not with their antioxidant effect, but with the disruption of the plasma membrane of the cells. The results obtained have shown that QCG exhibits antioxidant properties in solutions, but does not prevent generation of ROS in the plant cells. The mechanism of antioxidant effect of QCG is similar to that of PG and SOD.

Biochemistry (Moscow) published new progress about 121-79-9. 121-79-9 belongs to esters-buliding-blocks, auxiliary class Natural product, name is Propyl 3,4,5-trihydroxybenzoate, and the molecular formula is C10H12O5, Quality Control of 121-79-9.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Mohammed, Mona A.’s team published research in Scientific Reports in 12 | CAS: 121-79-9

Scientific Reports published new progress about 121-79-9. 121-79-9 belongs to esters-buliding-blocks, auxiliary class Natural product, name is Propyl 3,4,5-trihydroxybenzoate, and the molecular formula is C10H12O5, SDS of cas: 121-79-9.

Mohammed, Mona A. published the artcilePharmacological and metabolomic profiles of Musa acuminata wastes as a new potential source of anti-ulcerative colitis agents, SDS of cas: 121-79-9, the publication is Scientific Reports (2022), 12(1), 10595, database is CAplus and MEDLINE.

Musa acuminata (MA) is a popular fruit peels in the world. Non-food parts of the plant have been investigated for their antioxidant and anti-ulcerative colitis activity. Metabolomic approaches were found to be informative as a screening tool. It discovered different metabolites depending on statistical anal. The antioxidant activity content was measured by colorimetric method. Seventy six investigated metabolites were observed The identities of some of these markers were confirmed based on their MS2 fragmentation and NMR spectroscopy. These include: cinnamic acid and its dimer 2-hydroxy-4-(4-methoxyphenyl)-1H-phenalen-1-one beside; gallic acid and flavonoids; quercetin, quercetin-3-O-β-D-glucoside, luteolin-7-O-β-D-glucopyranoside. GC/MS anal. of MA peels essential oil led to identification of 37 compounds The leaves, pseudostem and fruit peels extracts were tested for their safety and their anti-ulcerative colitis efficacy in rats. Rats were classified into: normal, pos., prednisolone reference group, MA extracts pretreated groups (250-500 mg/kg) for 2 wk followed by induction of ulcerative colitis by per-rectal infusion of 8% acetic acid. Macroscopic and microscopic examinations were done. Inflammatory markers (ANCA, CRP and Ilβ6) were measured in sera. The butanol extracts showed good antioxidant and anti-inflammatory activities as they ameliorated macroscopic and microscopic signs of ulcerative colitis and lowered the inflammatory markers compared to untreated group. MA wastes can be a potential source of bioactive metabolites for industrial use and future employment as promising anti-ulcerative colitis food supplements.

Scientific Reports published new progress about 121-79-9. 121-79-9 belongs to esters-buliding-blocks, auxiliary class Natural product, name is Propyl 3,4,5-trihydroxybenzoate, and the molecular formula is C10H12O5, SDS of cas: 121-79-9.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Bijla, Laila’s team published research in Waste and Biomass Valorization in | CAS: 121-79-9

Waste and Biomass Valorization published new progress about 121-79-9. 121-79-9 belongs to esters-buliding-blocks, auxiliary class Natural product, name is Propyl 3,4,5-trihydroxybenzoate, and the molecular formula is C10H12O5, Product Details of C10H12O5.

Bijla, Laila published the artcileProximate Composition, Antioxidant Activity, Mineral and Lipid Profiling of Spent Coffee Grounds Collected in Morocco Reveal a Great Potential of Valorization, Product Details of C10H12O5, the publication is Waste and Biomass Valorization, database is CAplus.

Spent coffee grounds (SCGs) are a great pollution hazard towards the environment. However, SCGs may offer important opportunities of valorization. Here, we aimed at assessing SCGs valorization potential through physicochem. characterization. Proximate composition and SCG oil physicochem. traits were determined using official anal. methods. Mineral profiling was performed using inductively coupled plasma optical emission spectrometry. Total phenolic (TPC) and flavonoid content (TFC) along with antioxidant activity were also determined Proximate composition varied greatly among samples: Oil content (8.58 ± 0.01-18.55 ± 0.01%), protein content (13.87 ± 1.12-16.12 ± 1.30%), ash content (2.16 ± 0.01-3.61 ± 0.01%), and carbohydrates content (61.76 ± 1.21-70.37 ± 1.21%). Major elements were K (8323.23 ± 974.00), Ca (6181.18 ± 500.67), and Mg (2526.51 ± 204.64 mg kg-1). SCGs oil was rich in linoleic acid (43.20 ± 2.19%), palmitic acid (31.78 ± 2.02%), and oleic acid (12.68 ± 1.15%). Likewise, β-sitosterol was the most abundant sterol (44.70 ± 0.01%). SCGs contained important TFC (up to 32.18 ± 0.41 mg QE g-1) and TPC (up to 57.48 ± 0.10 mg GAE g-1) with great antioxidant activity as revealed by ABTS (up to 2.22 ± 0.01 mmol TE g-1), DPPH (up to 92.12 ± 0.22%) and FRAP (up to 93.94 ± 6.19 mg TE g-1) as well as DPPH IC50 (up to 53.73 ± 1.03 μg mL-1). SCGs, given their investigated physicochem. properties, present promising valorization opportunities for environment, food industry, pharmaceutical fields and agricultural sector.

Waste and Biomass Valorization published new progress about 121-79-9. 121-79-9 belongs to esters-buliding-blocks, auxiliary class Natural product, name is Propyl 3,4,5-trihydroxybenzoate, and the molecular formula is C10H12O5, Product Details of C10H12O5.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Zhang, Siyu’s team published research in Food Chemistry in 344 | CAS: 121-79-9

Food Chemistry published new progress about 121-79-9. 121-79-9 belongs to esters-buliding-blocks, auxiliary class Natural product, name is Propyl 3,4,5-trihydroxybenzoate, and the molecular formula is C13H16O2, Category: esters-buliding-blocks.

Zhang, Siyu published the artcileSolvent-free enzymatic synthesis of 1,2-dipalmitoylgalloylglycerol: Characterization and optimization of reaction condition, Category: esters-buliding-blocks, the publication is Food Chemistry (2021), 128604, database is CAplus and MEDLINE.

A novel diacylglycerol-based galloyl structured lipid, 1,2-dipalmitoylgalloylglycerol (DPGG), was synthesized using the enzymic transesterification of Pr gallate (PG) and tripalmitin under solvent-free condition. An immobilized and com. available food-grade Candida antarctica lipase B, Lipozyme 435, was used as the biocatalyst. The reaction variables that affect the yield of DPGG were optimized using a 33 full factorial design. At 70°C, DPGG was obtained at a yield of 33.0 ± 2.0% with PG conversion at 44.8 ± 1.8% when the following condition was used: 25 substrate molar ratio of tripalmitin to PG, 120 h reaction time, and 25% enzyme load relative to the total substrate weight The structure of reaction product was elucidated using Fourier-transform IR spectroscopy (FT-IR), electrospray ionization high-resolution accurate-mass tandem mass spectrometry (ESI-HRAM-MS/MS), and 1D and 2D NMR spectroscopy (NMR). The effects of different lipases and galloyl donors/acceptors on the transesterification were also investigated.

Food Chemistry published new progress about 121-79-9. 121-79-9 belongs to esters-buliding-blocks, auxiliary class Natural product, name is Propyl 3,4,5-trihydroxybenzoate, and the molecular formula is C13H16O2, Category: esters-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Zhang, Siyu’s team published research in Food Chemistry in 382 | CAS: 121-79-9

Food Chemistry published new progress about 121-79-9. 121-79-9 belongs to esters-buliding-blocks, auxiliary class Natural product, name is Propyl 3,4,5-trihydroxybenzoate, and the molecular formula is C13H16O2, HPLC of Formula: 121-79-9.

Zhang, Siyu published the artcileLipase-catalyzed one-step regioselective synthesis of 1,2-dioctanoylgalloylglycerol in a solvent-free system: Optimization of reaction conditions and structural elucidation, HPLC of Formula: 121-79-9, the publication is Food Chemistry (2022), 132302, database is CAplus and MEDLINE.

A multi-functional galloylated structured lipid, 1,2-dioctanoylgalloylglycerol (DOGG), was synthesized enzymically via a regioselective transesterification of Pr gallate and trioctanoate using an immobilized food-grade Candida antarctica lipase B (Lipozyme 435) as the biocatalyst under solvent-free condition. The variables that affect the reaction, including reaction temperature, substrate ratio, reaction time, and enzyme load, were evaluated and optimized using Taguchi method and response surface methodol. Both methods predicted the same optimal reaction condition, resulting in a 68.8 ± 1.3% DOGG yield with reaction selectivity of 82.9 ± 0.6% at 90 °C, 25/1 trioctanoate/PG (mol/mol), 72 h reaction, and 25% enzyme load relative to the total substrate weight The structure of the reaction product was elucidated using NMR spectroscopy and ESI-HRMS, confirming the regioselectivity of the reaction. Enzyme retained 50% of its activity after 5 cycles of reuse. It is feasible to synthesize DOGG as a potential antioxidant and nutraceutical using Lipozyme 435.

Food Chemistry published new progress about 121-79-9. 121-79-9 belongs to esters-buliding-blocks, auxiliary class Natural product, name is Propyl 3,4,5-trihydroxybenzoate, and the molecular formula is C13H16O2, HPLC of Formula: 121-79-9.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Toral, P. G.’s team published research in Journal of Dairy Science in 105 | CAS: 121-79-9

Journal of Dairy Science published new progress about 121-79-9. 121-79-9 belongs to esters-buliding-blocks, auxiliary class Natural product, name is Propyl 3,4,5-trihydroxybenzoate, and the molecular formula is C11H15NO2, Related Products of esters-buliding-blocks.

Toral, P. G. published the artcileEffect of lipid supplementation on the endogenous synthesis of milk cis-9,trans-11 conjugated linoleic acid in dairy sheep and goats: A tracer assay with 13c-vaccenic acid, Related Products of esters-buliding-blocks, the publication is Journal of Dairy Science (2022), 105(1), 255-268, database is CAplus and MEDLINE.

A major proportion of milk rumenic acid (RA; cis-9,trans-11 CLA) is synthesized through mammary Δ9-desaturation of vaccenic acid (VA; trans-11 18:1). Diet composition may determine the relative contribution of this endogenous synthesis to milk RA content, with effects that might differ between ruminant species. However, this hypothesis is mostly based on estimated values, proxies of stearoyl-CoA desaturase (SCD) activity, and indirect comparisons between publications in the literature. With the aim of providing new insights into this issue, in vivo Δ9-desaturation of 13C-labeled VA (measured via milk 13C-VA and -RA secretion) was directly compared in sheep and goats fed a diet without lipid supplementation or including 2% of linseed oil. Four Assaf sheep and 4 Murciano-Granadina goats were used in a replicated 2 x 2 crossover design to test the effects of the 2 dietary treatments during 2 consecutive 25-d periods. On d 22 of each period, 500 mg of 13C-VA were i.v. injected to each animal. Dairy performance, milk fatty acid profile, including isotope anal., and mammary mRNA abundance of genes coding for SCD were examined on d 21 to 25 of each period. Supplementation with linseed oil improved milk fat concentration and increased the content of milk VA and RA. However, the isotopic tracer assay suggested no variation in the relative proportion of VA desatd. to milk RA, and the percentage of this CLA isomer deriving from SCD activity would remain constant regardless of dietary treatment. These results put into question a major effect of lipid supplementation on the endogenous synthesis of milk RA and support that mammary Δ9-desaturation capacity would not represent a limiting factor when designing feeding strategies to increase milk RA content. The lack of diet-induced effects was common to caprines and ovines, but inherent interspecies differences in mammary lipogenesis were found. Thus, the higher proportions of VA desaturation and endogenous synthesis of milk RA in sheep supported a greater SCD activity compared with goats, a finding that was not associated with the similar mRNA abundance of SCD1 in the 2 species. On the other hand, transfer efficiency of the isotopic tracer to milk was 37% higher in caprine than in ovine, suggesting a greater efficiency in mammary fatty acid uptake from plasma in caprine.

Journal of Dairy Science published new progress about 121-79-9. 121-79-9 belongs to esters-buliding-blocks, auxiliary class Natural product, name is Propyl 3,4,5-trihydroxybenzoate, and the molecular formula is C11H15NO2, Related Products of esters-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics