Category: esters-buliding-blocks

Comparative chemical and biological study of roots and aerial parts of Halocnemum strobilaceum growing wildly in Egypt was written by Abdel Razek, M. M. M.;Moussa, A. Y.;El-Shanawany, M. A.;Singab, A. B.. And the article was included in Journal of Pharmaceutical Sciences and Research in 2019.Safety of Methyl nonadecanoate The following contents are mentioned in the article:

Halocnemum strobilaceum is a terrestrial halophytic plant with reported folk medicinal uses. RAPD-PCR was used to amplify the DNA fragments where 83 amplified DNA fragments result from the RAPD-PCR, and primer P2 was the best sequence dominating them. GC/MS anal. identified the components of both the root and the aerial parts hexane extracts as hexadecanoic acid Me ester (38.88%) and 9-octadecenoic acid (Z)- Me ester (23.25%) in the former and dodecane (9.83%), heptadecane (8.26%) and octadecane (8.2%) in the latter. MTT cell viability assay was carried out on three different human cell lines, MCF-7, Hep-G2 and Caco-2, to evaluate the cytotoxic potential of H. strobilaceum; furthermore, the cup well diffusion and serial dilution methods were utilized to screen for the anti-infective potential. Marked activity was recorded for the aerial part against the MCF-7 cell line after 24h, 48h and 72h, with IC50 values of 227.40, 184.45 and 135.68 μg/mL, resp., and moderate cell killing effect was manifested by the root part with IC50 values of 341.98, 308.77 and 218.99 μg/mL. H. strobilaceum root extract exhibits significant effect against Bacillus subtilis and Staphylococcus aureus, with MIC values of 6.25 and 50 μg/mL resp. H. strobilaceum is a promising candidate for further future biol. studies. This study involved multiple reactions and reactants, such as Methyl nonadecanoate (cas: 1731-94-8Safety of Methyl nonadecanoate).

Methyl nonadecanoate (cas: 1731-94-8) belongs to esters. Esters typically have a pleasant smell; those of low molecular weight are commonly used as fragrances and are found in essential oils and pheromones. Acyl chlorides and acid anhydrides alcoholysis is another way to produce esters. Acyl chlorides and acid anhydrides react with alcohols to produce esters. Anydrous conditions are recommended since both acyl chlorides and acid anhydrides react with water.Safety of Methyl nonadecanoate

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Optimization of Lipid Nanoparticles for Intramuscular Administration of mRNA Vaccines was written by Hassett, Kimberly J.;Benenato, Kerry E.;Jacquinet, Eric;Lee, Aisha;Woods, Angela;Yuzhakov, Olga;Himansu, Sunny;Deterling, Jessica;Geilich, Benjamin M.;Ketova, Tatiana;Mihai, Cosmin;Lynn, Andy;McFadyen, Iain;Moore, Melissa J.;Senn, Joseph J.;Stanton, Matthew G.;Almarsson, Orn;Ciaramella, Giuseppe;Brito, Luis A.. And the article was included in Molecular Therapy–Nucleic Acids in 2019.Computed Properties of C43H79NO2 The following contents are mentioned in the article:

MRNA vaccines have the potential to tackle many unmet medical needs that are unable to be addressed with conventional vaccine technologies. A potent and well-tolerated delivery technol. is integral to fully realizing the potential of mRNA vaccines. Pre-clin. and clin. studies have demonstrated that mRNA delivered i.m. (IM) with first-generation lipid nanoparticles (LNPs) generates robust immune responses. Despite progress made over the past several years, there remains significant opportunity for improvement, as the most advanced LNPs were designed for i.v. (IV) delivery of siRNA to the liver. Here, we screened a panel of proprietary biodegradable ionizable lipids for both expression and immunogenicity in a rodent model when administered IM. A subset of compounds was selected and further evaluated for tolerability, immunogenicity, and expression in rodents and non-human primates (NHPs). A lead formulation was identified that yielded a robust immune response with improved tolerability. More importantly for vaccines, increased innate immune stimulation driven by LNPs does not equate to increased immunogenicity, illustrating that mRNA vaccine tolerability can be improved without affecting potency. This study involved multiple reactions and reactants, such as (6Z,9Z,28Z,31Z)-Heptatriaconta-6,9,28,31-tetraen-19-yl 4-(dimethylamino)butanoate (cas: 1224606-06-7Computed Properties of C43H79NO2).

(6Z,9Z,28Z,31Z)-Heptatriaconta-6,9,28,31-tetraen-19-yl 4-(dimethylamino)butanoate (cas: 1224606-06-7) belongs to esters. Esters typically have a pleasant smell; those of low molecular weight are commonly used as fragrances and are found in essential oils and pheromones. Esters contain a carbonyl center, which gives rise to 120° C–C–O and O–C–O angles. Unlike amides, esters are structurally flexible functional groups because rotation about the C–O–C bonds has a low barrier. Their flexibility and low polarity is manifested in their physical properties; they tend to be less rigid (lower melting point) and more volatile (lower boiling point) than the corresponding amides. Computed Properties of C43H79NO2

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Characterization of Potent Aroma Compounds in Preserved Egg Yolk by Gas Chromatography-Olfactometry, Quantitative Measurements, and Odor Activity Value was written by Zhang, Yu;Liu, Yuping;Yang, Wenxi;Huang, Jia;Liu, Yingqiao;Huang, Mingquan;Sun, Baoguo;Li, Changlin. And the article was included in Journal of Agricultural and Food Chemistry in 2018.HPLC of Formula: 2253-73-8 The following contents are mentioned in the article:

To characterize potent odor-active compounds in preserved egg yolk (PEY), volatile compounds were isolated by headspace solid-phase microextraction and solvent-assisted flavor evaporation Gas chromatog.-olfactometry (GC-O) and gas chromatog.-mass spectrometry (GC-MS) analyses identified a total of 53 odor-active compounds by comparing the odor characteristics, MS data, and retention indexes with those of reference compounds Twenty-seven odorants were detected in at least five isolates that were extracted and analyzed by the same method, and their flavor dilution (FD) factors, ranging from 1 to 2048, were measured by aroma extract dilution anal. (AEDA). To further determine their contribution to the overall aroma profile of PEY, 22 odorants with FD factors ≥16 and GC-MS responses were quantitated, and their odor activity values (OAVs) were calculated According to the OAV results, 19 odorants with OAVs ≥ 1 are the potent odorants that greatly contribute to the characteristic aroma of PEY. Nine compounds were identified for the first time: (E,Z)-2,6-nonadienal, (E)-2-nonenal, 2-methylbutanal, di-Me disulfide, trimethylamine, methional, di-Me trisulfide, diisopropyl disulfide, and di-Et disulfide. This study involved multiple reactions and reactants, such as Isopropylisothiocyanate (cas: 2253-73-8HPLC of Formula: 2253-73-8).

Isopropylisothiocyanate (cas: 2253-73-8) belongs to esters. Volatile esters with characteristic odours are used in synthetic flavours, perfumes, and cosmetics. Certain volatile esters are used as solvents for lacquers, paints, and varnishes. Esters contain a carbonyl center, which gives rise to 120° C–C–O and O–C–O angles. Unlike amides, esters are structurally flexible functional groups because rotation about the C–O–C bonds has a low barrier. Their flexibility and low polarity is manifested in their physical properties; they tend to be less rigid (lower melting point) and more volatile (lower boiling point) than the corresponding amides. HPLC of Formula: 2253-73-8

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Size and Charge Characterization of Lipid Nanoparticles for mRNA Vaccines was written by Malburet, Camille;Leclercq, Laurent;Cotte, Jean-Francois;Thiebaud, Jerome;Bazin, Emilie;Garinot, Marie;Cottet, Herve. And the article was included in Analytical Chemistry (Washington, DC, United States) in 2022.Recommanded Product: (6Z,9Z,28Z,31Z)-Heptatriaconta-6,9,28,31-tetraen-19-yl 4-(dimethylamino)butanoate The following contents are mentioned in the article:

mRNA vaccines have come into the spotlight as a promising and adaptive alternative to conventional vaccine approaches. The efficacy of mRNA vaccines relies on the ability of mRNA to reach the cytoplasm of cells, where it can be translated into proteins of interest, allowing it to trigger the immune response. However, unprotected mRNA is unstable and susceptible to degradation by exo- and endonucleases, and its neg. charges are electrostatically repulsed by the anionic cell membranes. Therefore, mRNA needs a delivery system that protects the nucleic acid from degradation and allows it to enter into the cells. Lipid nanoparticles (LNPs) represent a nonviral leading vector for mRNA delivery. Physicochem. parameters of LNPs, including their size and their charge, directly impact their in vivo behavior and, therefore, their cellular internalization. In this work, Taylor dispersion anal. (TDA) was used as a new methodol. for the characterization of the size and polydispersity of LNPs, and capillary electrophoresis (CE) was used for the determination of LNP global charge. The results obtained were compared with those obtained by dynamic light scattering (DLS) and laser Doppler electrophoresis (LDE). This study involved multiple reactions and reactants, such as (6Z,9Z,28Z,31Z)-Heptatriaconta-6,9,28,31-tetraen-19-yl 4-(dimethylamino)butanoate (cas: 1224606-06-7Recommanded Product: (6Z,9Z,28Z,31Z)-Heptatriaconta-6,9,28,31-tetraen-19-yl 4-(dimethylamino)butanoate).

(6Z,9Z,28Z,31Z)-Heptatriaconta-6,9,28,31-tetraen-19-yl 4-(dimethylamino)butanoate (cas: 1224606-06-7) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Esters are more polar than ethers but less polar than alcohols. They participate in hydrogen bonds as hydrogen-bond acceptors, but cannot act as hydrogen-bond donors, unlike their parent alcohols. This ability to participate in hydrogen bonding confers some water-solubility.Recommanded Product: (6Z,9Z,28Z,31Z)-Heptatriaconta-6,9,28,31-tetraen-19-yl 4-(dimethylamino)butanoate

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Synchronous pressing and refining after solid-phase preadsorption technology as a new method for rapeseed oil preparation was written by Wang, Weijun;Yang, Bo;Huang, Fenghong;Zheng, Chang;Li, Wenlin;Liu, Tieliang;Liu, Changsheng. And the article was included in LWT–Food Science and Technology in 2022.Name: Glyceryl monostearate The following contents are mentioned in the article:

A new method for rapeseed oil preparation named synchronous pressing and refining after solid-phase preadsorption technol. was investigated. Rapeseed and adsorbents were first mixed evenly to form premixes, and the product oils were then obtained by direct pressing and filtering. The phospholipid content, acid value, a* value, chlorophyll, carotene, polyphenol contents of crude oil increased, while L* and b* values decreased with increasing squeezing chamber temperature A moderate adsorbent dosage and temperature could improve the refining effects. Silicon dioxide had the highest dephosphorization and deacidification rates of 95% and 42%, resp., when the dosage was 30 g/kg at 130 °C. Activated clay decreased the chlorophyll and carotene contents by 75% and 38%, resp. Sucrose fatty acid ester had dephosphorization and deacidification rates of 67s% and 41%, resp. Ascorbic palmitate had a dephosphorization rate of 74% and retained polyphenols intactly. This technol. would not affect the oil yield and could decrease the peroxide value of rapeseed oil. It realized the simultaneous completion of pressing and refining with the advantages of a short preparation time and environmental sustainability. This study involved multiple reactions and reactants, such as Glyceryl monostearate (cas: 31566-31-1Name: Glyceryl monostearate).

Glyceryl monostearate (cas: 31566-31-1) belongs to esters. Carboxylic acid esters of low molecular weight are colourless, volatile liquids with pleasant odours, slightly soluble in water. Many esters have the potential for conformational isomerism, but they tend to adopt an s-cis (or Z) conformation rather than the s-trans (or E) alternative, due to a combination of hyperconjugation and dipole minimization effects. The preference for the Z conformation is influenced by the nature of the substituents and solvent, if present. Lactones with small rings are restricted to the s-trans (i.e. E) conformation due to their cyclic structure.Name: Glyceryl monostearate

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Minimal metallo-nanozymes constructed through amino acid coordinated self-assembly for hydrolase-like catalysis was written by Han, Jingjing;Zou, Qianli;Su, Weiwei;Yan, Xuehai. And the article was included in Chemical Engineering Journal (Amsterdam, Netherlands) in 2020.SDS of cas: 5003-48-5 The following contents are mentioned in the article:

Bioinspired nanozymes are promising in mimicking natural processes and developing function-enhanced architectures. However, constructing artificial enzyme systems with catalytic efficiencies rivaling that of natural enzymes in a minimal principle is challenging. Herein, we report the construction of minimal metallo-nanozymes through amino acid coordinated self-assembly by using amino acid derivatives and zinc (II) ions as the building blocks, reminiscent of the components of the catalytic architectures in natural hydrolases. The obtained metallo-nanozymes possess high and robust activity comparable to that of natural lipase in catalytically hydrolyzing Ph acetate. In addition, catalytic performance of the metallo-nanozymes can be facilely optimized by changing the ratio between the building blocks and the introduction of addnl. biomols. The metallo-nanozymes also show catalytic activity in producing acetylsalicylic acid through the hydrolyzation of a prodrug, benorilate. This work highlights the minimal principle and excellent catalytic performance of stable metallo-nanozymes, opening up immense opportunities in the development of highly efficient nanozymes and catalytic prodrug conversion. This study involved multiple reactions and reactants, such as 4-Acetamidophenyl 2-acetoxybenzoate (cas: 5003-48-5SDS of cas: 5003-48-5).

4-Acetamidophenyl 2-acetoxybenzoate (cas: 5003-48-5) belongs to esters. Volatile esters with characteristic odours are used in synthetic flavours, perfumes, and cosmetics. Certain volatile esters are used as solvents for lacquers, paints, and varnishes. Cyclic esters are called lactones, regardless of whether they are derived from an organic or inorganic acid. One example of an organic lactone is γ-valerolactone.SDS of cas: 5003-48-5

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Aquatic Toxicity Assessment of Esters Towards the Daphnia magna Through PCA-ANFIS was written by Asadollahi-Baboli, M.. And the article was included in Bulletin of Environmental Contamination and Toxicology in 2013.COA of Formula: C7H14O3 The following contents are mentioned in the article:

The widespread production of esters combined with their ability to migrate in different compartments, makes their environmental toxicity important. In this background, the multivariate image anal.-quant. structure-toxicity relationship (MIA-QSTR) method coupled to principal component anal.-adaptive neuro-fuzzy inference systems (PCA-ANFIS) was applied to assess the toxicity of esters to Daphnia magna. In MIA-QSTR, pixels of chem. structures (2D images) stand for descriptors, and structural changes account for the variance in toxicities. The ANFIS procedure was capable of correlating the inputs (PCA scores) with the toxicities accurately. The PCA-ANFIS also was statistically validated for its predictive power using cross-validation, applicability domain and Y-scrambling evaluation procedures. The satisfactory results (R_p² = 0.926, Q_LOO² = 0.887, R_L25 %O² = 0.843, RMSE_LOO = 0.320 and RMSE_L25 %O = 0.379) suggests that the QSTR model could be proposed as an alternative method for aquatic toxicity assessment of esters allowing possible application in the European Union regulation REACH. This study involved multiple reactions and reactants, such as Ethyl 3-ethoxypropanoate (cas: 763-69-9COA of Formula: C7H14O3).

Ethyl 3-ethoxypropanoate (cas: 763-69-9) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits. Many esters have the potential for conformational isomerism, but they tend to adopt an s-cis (or Z) conformation rather than the s-trans (or E) alternative, due to a combination of hyperconjugation and dipole minimization effects. The preference for the Z conformation is influenced by the nature of the substituents and solvent, if present. Lactones with small rings are restricted to the s-trans (i.e. E) conformation due to their cyclic structure.COA of Formula: C7H14O3

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Prediction of flash points of pure organic compounds: Evaluation of the DIPPR database was written by Alibakhshi, A.;Mirshahvalad, H.;Alibakhshi, S.. And the article was included in Process Safety and Environmental Protection in 2017.Electric Literature of C7H14O3 The following contents are mentioned in the article:

The flash point is one of the most important flammability properties of compounds for the design of inherently safe processes. Many models have been developed to predict the flash point using the DIPPR database. However, for only 740 of the 1628 organic compounds available in the DIPPR database, the data for both flash point and normal b.p. were exptl. determined For the other compounds, at least one of these properties was predicted and therefore is not appropriate for model development. The present study introduces a model to predict the flash points of pure organic compounds using their mol. structures and normal b.ps. The new model exploits the equality of the relative errors observed for the normal b.p. and flash point values predicted using the Joback method. Consequently, the relative error of the predicted normal b.ps. can be used as a scaling factor to modify the predicted flash points. The ability of the model to evaluate the accuracy of a database was investigated. The ratio of the relative error of the predicted flash point to the relative error of the predicted normal b.p. obtained using the Joback method was proposed as a measure to evaluate the accuracy of flash point data. This study involved multiple reactions and reactants, such as Ethyl 3-ethoxypropanoate (cas: 763-69-9Electric Literature of C7H14O3).

Ethyl 3-ethoxypropanoate (cas: 763-69-9) belongs to esters. Esters are also usually derived from carboxylic acids. It may also be obtained by reaction of acid anhydride or acid halides with alcohols or by the reaction of salts of carboxylic acids with alkyl halides. Liquid esters of low volatility serve as softening agents for resins and plastics. Esters also include many industrially important polymers. Polymethyl methacrylate is a glass substitute sold under the names Lucite and Plexiglas; polyethylene terephthalate is used as a film (Mylar) and as textile fibres sold as Terylene, Fortrel, and Dacron.Electric Literature of C7H14O3

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Shelf Life Extension of Sardines (Sardinella albella) Using Betel Leaf (Piper betle) Incorporated Ice was written by Arulkumar, Abimannan;Swain, Bhikari;Paramasivam, Sadayan. And the article was included in Food and Bioprocess Technology in 2020.COA of Formula: C15H22O2 The following contents are mentioned in the article:

Abstract: The present study aimed to evaluate the combined effects of betel leaf (Piper betle) extracts on sardine (Sardinella albella) muscle to extend its shelf life during storage in ice. Addnl., the effects of betel leaf extracts on microbial activity, biochem., sensory score, and biogenic amines formation were monitored in S. albella stored with traditional ice and ice with betel leaf extract during a 14-day storage period. Identification of bioactive compounds from P. betle revealed the presence of potent biopreservative compounds such as 4-methoxy-isophthalic acid, phenol, and propanoic acid. The effect of blended P. betle at two different concentrations (0.05% and 0.1% /L of distilled water) in the ice medium was tested for the protection of sardine meat and compared with preservation in traditional ice. Inhibitory effects (p < 0.05) on the microbial proliferation and biochem. markers of fish deterioration were evidenced for ice containing both concentrations of P. betle after 10-14 days compared with the control. The sensory score acceptability limit was reached at 10 days for sardines stored in traditional ice and 14 days for sardines stored in ice containing P. betle extract This study involved multiple reactions and reactants, such as 2-Ethylhexyl benzoate (cas: 5444-75-7COA of Formula: C15H22O2).

2-Ethylhexyl benzoate (cas: 5444-75-7) belongs to esters. Volatile esters with characteristic odours are used in synthetic flavours, perfumes, and cosmetics. Certain volatile esters are used as solvents for lacquers, paints, and varnishes. Because of their lack of hydrogen-bond-donating ability, esters do not self-associate. Consequently, esters are more volatile than carboxylic acids of similar molecular weight.COA of Formula: C15H22O2

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics