Tag: 300-400

Continuous biodiesel production in a helicoidal reactor using ultrasound-assisted transesterification reaction of waste cooking oil was written by Delavari, Armin;Halek, Farah;Amini, Mohammad. And the article was included in Clean Technologies and Environmental Policy in 2015.Formula: C20H40O2 The following contents are mentioned in the article:

Designing of a continuous biodiesel production system from waste cooking oil with ultrasonic homogenizer assistant through transesterification reaction was studied. Through some pre-tests based on cavitation phenomenon to accelerate the transesterification reaction, two types of reactors (batch and continuous) were used. GC-MS results showed the total content of 94.2 % of Me esters derived from different fatty acids formed in a batch reactor using a magnetic stirrer and an elec. heater. These results were then compared to those of two ultrasonic homogenizers with low and high capacities of 400 and 1,500 W, which tested successfully under mild conditions. The results indicated the advantages of using ultrasonic homogenizer. The continuous system consisted of a 1,500 W ultrasonic homogenizer and glass helicoidal reactor with a tube length of 20 m. This set-up was kept submerged in a hot water bath. As a result, the reaction time decreased to 150 s, the methanol/oil molar ratio was 8.6 and the weight % of NaOH/oil was 0.5 %. After separation of undesired contents, the phys. and chem. characteristics of the final product were measured according to ASTM standard methods. Study of performance of the system also showed a significant improvement in yield of the reaction (90 %) compared to prior studies. This study involved multiple reactions and reactants, such as Methyl nonadecanoate (cas: 1731-94-8Formula: C20H40O2).

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. 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.Formula: C20H40O2

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

Optimization of oil yield of Phaleria macrocarpa seed using response surface methodology and its fatty acids constituents was written by Azmir, J.;Zaidul, I. S. M.;Rahman, M. M.;Sharif, K. M.;Sahena, F.;Jahurul, M. H. A.;Mohamed, A.. And the article was included in Industrial Crops and Products in 2014.Application In Synthesis of Methyl nonadecanoate The following contents are mentioned in the article:

Phaleria macrocarpa (Mahkota dewa) seed was examined to determine the optimal conditions of oil yield by solvent extraction method using n-hexane as extracting solvent. Response surface methodol. (RSM) was employed to describe explicitly the influence of extraction time, temperature and solvent-to-feed ratio on the yield of oil using central composite design (CCD). The linear, quadratic and interaction terms of the studied variables have significant (P < 0.05) effect on the oil yield. The temperature of 72 °C, extraction time of 8.4 h and solvent-to-feed ratio of 10.9 mL/g were the optimal conditions for seed oil extraction The maximum oil yield was 55.32 g/100 g dry weight under these optimal conditions. Main chem. constituents of oil were determined by Gas chromatog.-mass spectroscopy (GC-MS) and Fourier transform IR spectroscopy (FTIR). Twelve components were identified by GC-MS anal. after formation of fatty acid Me ester (FAME). Total saturated fatty acids were 19.38% whereas monounsaturated fatty acids and polyunsaturated fatty acids were 44.23% and 36.38%, resp. Oleic acid, 18:1 (43.56%) and linoleic acid, 18:2 (36.25%) were the main fatty acid constituents of Mahkota dewa seed oil. The quantity of unsaturated fatty acids was higher than saturated fatty acids in P. macrocarpa seed oil. This study involved multiple reactions and reactants, such as Methyl nonadecanoate (cas: 1731-94-8Application In Synthesis of Methyl nonadecanoate).

Methyl nonadecanoate (cas: 1731-94-8) 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. Polyesters are important plastics, with monomers linked by ester moieties. 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.Application In Synthesis of Methyl nonadecanoate

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

CuAAC mediated synthesis of cyclen cored glycodendrimers of high sugar tethers at low generation was written by Agrahari, Anand K.;Jaiswal, Manoj K.;Yadav, Mangal S.;Tiwari, Vinod K.. And the article was included in Carbohydrate Research in 2021.SDS of cas: 604-69-3 The following contents are mentioned in the article:

Glycodendrimers are receiving considerable attention to mimic a number of imperative features of cell surface glycoconjugate and acquired excellent relevance to a wide domain of investigations including medicine, pharmaceutics, catalysis, nanotechnol., carbohydrate-protein interaction, and moreover in drug delivery systems. Toward this end, an expeditious, modular, and regioselective triazole-forming CuAAC click approach along with double stage convergent synthetic method was chosen to develop a variety of novel chlorine-containing cyclen cored glycodendrimers of high sugar tethers at low generation of promising therapeutic potential. We developed a novel chlorine-containing hyper-core unit with 12 alkynyl functionality originated from cyclen scaffold which was confirmed by its single crystal X-ray data anal. Further, the modular CuAAC technique was utilized to produce a variety of novel 12-sugar coated (G₀) glycodendrimers with β-Glc-, β-Man-, β-Gal-, β-Lac, along with 36-galactose coated (G₁) glycodendrimer in good-to-high yield. The structures of the developed glycodendrimer architectures have been well elucidated by extensive spectral anal. including NMR (¹H & ¹³CNMR), HRMS, MALDI-TOF MS, UV-Vis, IR, and SEC (Size Exclusion Chromatogram) data. This study involved multiple reactions and reactants, such as (2S,3R,4S,5R,6R)-6-(Acetoxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetrayl tetraacetate (cas: 604-69-3SDS of cas: 604-69-3).

(2S,3R,4S,5R,6R)-6-(Acetoxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetrayl tetraacetate (cas: 604-69-3) belongs to esters. Carboxylic acid esters of low molecular weight are colourless, volatile liquids with pleasant odours, slightly soluble in water. 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.SDS of cas: 604-69-3

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

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

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

Structural Modification of O/W Bigels by Glycerol Monostearate for Improved Co-Delivery of Curcumin and Epigallocatechin Gallate was written by Lu, Yao;Zhong, Yuan;Guo, Xinlu;Zhang, Jie;Gao, Yanxiang;Mao, Like. And the article was included in ACS Food Science & Technology in 2022.Safety of Glyceryl monostearate The following contents are mentioned in the article:

Bigels of oleogel-in-hydrogel structures were developed as carriers for curcumin and epigallocatechin gallate (EGCG), and the roles of oleogelator (glycerol monostearate, GMS) content on the structures and delivery functionality were elucidated. The results indicated that hardness and viscosity of the bigels were gradually enhanced with the increase in GMS content. In the meantime, oil holding capacity of the bigels was improved, while water holding capacity remained unchanged. XRD anal. and CLSM observation revealed that higher GMS content contributed to higher crystallinity and more compact gel systems. When curcumin and EGCG were incorporated within bigels, their release could also be modulated by the gel structures. Curcumin was slowly released in gastric digestion and rapidly released in intestinal juices. Higher content of GMS led to a much lower release rate of curcumin. EGCG was quickly released in the gastric juice, and the release rate was almost constant afterward. GMS content had little effect on the release of EGCG. The information obtained proved that bigels could codeliver functional ingredients of different polarities, whose release could be modulated by gel structures. This study involved multiple reactions and reactants, such as Glyceryl monostearate (cas: 31566-31-1Safety of Glyceryl monostearate).

Glyceryl monostearate (cas: 31566-31-1) 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 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.Safety of Glyceryl monostearate

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

Structural characterization of the thermal extracts of lignite was written by Wang, Zhicai;Shui, Hengfu;Pan, Chunxiu;Li, Liang;Ren, Shibiao;Lei, Zhiping;Kang, Shigang;Wei, Cheng;Hu, Jingchen. And the article was included in Fuel Processing Technology in 2014.HPLC of Formula: 1731-94-8 The following contents are mentioned in the article:

Thermal extraction (TE) with nonspecific solvent at high temperature is a potential technol. to sep. organic materials from coal, especially low-rank coal such as lignite. In this paper, thermal extract (TES) of Xianfeng lignite (XL) in toluene/methanol (3:1, volume) mixed solvent at 300 °C was separated into different sub-fractions by the method of column chromatog. combined with Soxhlet extraction in THF (THF). These sub-fractions were characterized by element anal., FTIR, ¹H NMR and GC/MS. 78 compounds including C_12-30 higher aliphatic hydrocarbons (HAHs), aromatic hydrocarbons (AHs), C_17-27 fatty acid Me esters (FAMEs) and other heteroat. compounds were identified from the TES. As two groups of predominant components, HAHs and FAMEs are the intrinsic components in XL except for small amount of FAMEs produced by esterification and transesterification reactions in the TE process. Further, the mechanism of TE was also speculated by the characterization results of TES. As a result, the TE with nonspecific solvent at high temperature can not only improve the extract yield of organic materials, but also obtain chems. such as HAHs and FAMEs from lignite. This study involved multiple reactions and reactants, such as Methyl nonadecanoate (cas: 1731-94-8HPLC of Formula: 1731-94-8).

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. 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.HPLC of Formula: 1731-94-8

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

Formulation and evaluation of hydrophobic polymer based matrix sustained release tablets of captopril was written by Mishra, Shreyash;Upadhyay, Pranav Kumar. And the article was included in European Journal of Biomedical and Pharmaceutical Sciences in 2022.Electric Literature of C21H44O5 The following contents are mentioned in the article:

A review. The purpose of the present study was to prepare oral sustained release matrix tablets of highly water soluble drug, Captopril using a hydrophobic polymer compritol (glyceryl behenate) and to evaluate the effect of hydrophobic polymer and effect of methods of preparation on the release of the drug The tablets were prepared by direct compression, wet granulation techniques. The matrix tablets were evaluated for various parameters as phys. appearance, dimensions, hardness, weight variation, friability, drug content, in vitro dissolution studies. Also the matrix tablets prepared by hot melt granulation showed more effective retarded release rate than tablets prepared by direct compression and wet granulation techniques. Compritol 888 ATO can be used as a matrix former to sustain the release of water soluble drugs. Tizanidine hydrochloride tablets were prepared by melt direct compression technique using xanthum gum, glyceryl behenate, glyceryl monostearate and stearic acid in different proportion. Formulated sustend release tablets were evaluated for appearance, dimensions (diameter and thickness), weight varation, hardness, friability, drug content and in-vitro release of Tizanidine hydrochloride. This study involved multiple reactions and reactants, such as Glyceryl monostearate (cas: 31566-31-1Electric Literature of C21H44O5).

Glyceryl monostearate (cas: 31566-31-1) 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. 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.Electric Literature of C21H44O5

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

Chromatographic efficiency of polar capillary columns applied for the analysis of fatty acid methyl esters by gas chromatography was written by Waktola, Habtewold D.;Mjos, Svein A.. And the article was included in Journal of Separation Science in 2018.Recommanded Product: Methyl nonadecanoate The following contents are mentioned in the article:

The chromatog. efficiency that could be achieved in temperature-programmed gas chromatog. was compared for four capillary columns that are typically applied for anal. of fatty acid Me esters (FAME). Three different carrier gases, hydrogen, helium and nitrogen, were applied. For each experiment, the carrier gas velocities and the temperature rates were varied with a full 9 × 3 design, with nine levels on the carrier gas velocity and temperature rates of 1, 2 or 3°/min. Response surface methodol. was used to create models of chromatog. efficiency as a function of temperature rate and carrier gas velocity. The chromatog. efficiency was defined as the inverse of peak widths measured in retention index units. The final results were standardized so that the efficiencies that could be achieved within a certain time frame, defined by the retention time of the last compound in the chromatogram, could be compared. There were clear differences in the efficiencies that could be achieved with the different columns and that the efficiency decreased with increasing polarity of the stationary phase. The differences can be explained by higher resistance to mass transfer in the stationary phase in the most polar columns. This study involved multiple reactions and reactants, such as Methyl nonadecanoate (cas: 1731-94-8Recommanded Product: Methyl nonadecanoate).

Methyl nonadecanoate (cas: 1731-94-8) 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. 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.Recommanded Product: Methyl nonadecanoate

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