Tag: M.W=250-300

Kuo, Wen-Jang; Hsiue, Ging-Ho; Jeng, Ru-Jong published the artcile< Synthesis and macroscopic second-order nonlinear optical properties of poly(ether imide)s containing a novel two-dimensional carbazole chromophore with nitro acceptors>, Application of C19H34O2, the main research area is carbazole nitrophenyl substituted preparation formylation condensation reaction.

A two-dimensional carbazole chromophore with nitrophenyl group acceptors was synthesized by diformylation of carbazole and Horner-Emmons-Wadsworth condensation with diethyl-(4′-nitrobenzyl)phosphonate. The chromophore showed first mol. hyperpolarizability of 163 × 10-30 esu, as measured using solvatochromic methods. The NLO chromophore was mixed with an organosol. poly(ether imide) 2,2′-bis(4-aminophenyl)biphenyl-4,4′-hexafluoroisopropylidene diphthalic anhydride copolymer (6FPEI) to obtain a series of guest-host NLO materials containing up to 20% chromophore, with no aggregation despite the chromophore content. The compatibility of the NLO chromophore and the poly(ether imide) was studied by SEM and extraction experiments The compatibility is dependent on the mol. weight distribution of the poly(ether-imide). The second harmonic coefficient (d33) for the NLO-active poly(ether imide)s is 7 to 23 pm V-1, depending on doping level. The effect of two-dimensional structure on the NLO chromophore temporal stability was studied by tracing the second harmonic coefficient as a function of time. The relaxation of the NLO systems was further examined by dielec. measurements. Large rotational cone volume provide the two-dimensional chromophore with excellent orientational stability, as the temperature approaches the glass transition temperature

Journal of Materials Chemistry published new progress about Complex modulus, tan δ. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Application of C19H34O2.

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

Belyaeva, M. A.; Gryaznova, M. V.; Danilov, V. V.; Khapova, O. V.; Ponomarev, A. N.; Ermolaeva, G. M.; Shakhverdov, T. A. published the artcile< New Nanoheterostructures Based on Astralenes: Spectral Characteristics and Some Application Aspects>, Reference of 112-63-0, the main research area is nanoheterostructure astralene spectral property.

Original compositions as suspensions of astralenes with luminescing solubilizers in various solvents, including liquid crystals (LCs), are developed. Using an LC composition as an example, the possibility of extending the dynamic range of optical limiting due to the joint action of two-photon absorption in the LC matrix and stimulated scattering by C nanoparticles is demonstrated. The spectral and luminescent characteristics of such suspensions are determined The role played by the photochem. factor in the photodynamics of optical limiting in C heteronanostructures is discussed.

Optics and Spectroscopy published new progress about IR spectra. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Reference of 112-63-0.

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

Arakawa, Yoshiki; Mineharu, Yohei; Uto, Megumi; Mizowaki, Takashi published the artcile< Optimal managements of elderly patients with glioblastoma.>, Category: esters-buliding-blocks, the main research area is chemotherapy; elderly; glioblastoma; management; radiotherapy; surgery.

Optimizing the management of elderly patients with glioblastoma is an ongoing task in neuro-oncology. The number of patients with this tumor type is gradually increasing with the aging of the population. Although available data and practice recommendations remain limited, the current strategy is maximal safe surgical resection followed by radiotherapy in combination with temozolomide. However, survival is significantly worse than that in the younger population. Surgical resection provides survival benefit in patients with good performance status. Hypofractionated radiotherapy decreases toxicities while maintaining therapeutic efficacy, thus improving treatment adherence and subsequently leading to better quality of life. The intensity of these treatments should be balanced with patient-specific factors and consideration of quality of life. This review discusses the current optimal management in terms of efficacy and safety, as well as future perspectives.

Japanese journal of clinical oncology published new progress about 112-63-0. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Category: esters-buliding-blocks.

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

Lee, Jung Gyu; Choi, Kyung Il; Pae, Ae Nim; Koh, Hun Yeong; Kang, Yonghan; Cho, Yong Seo published the artcile< Indium-mediated diastereoselective allylation reactions: preparation of α-hydroxy and α-amino acids>, Synthetic Route of 112-63-0, the main research area is indium asym allylation glyoxyloylbornane sultam hemiacetal imine.

Stereoisomers of N-glyoxyloylbornane-10,2-sultam hemiacetal I and related imine II reacted with allyl iodide in the presence of indium in DMF to give the corresponding α-hydroxy and α-amino camphor sultam derivatives with high diastereoselectivities (86-90% de). This method could be useful for the preparation of α-hydroxy and α-amino acids.

Journal of the Chemical Society, Perkin Transactions 1 published new progress about Allylation, stereoselective. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Synthetic Route of 112-63-0.

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

Gomez, Javier Chavarro; Zakaria, Rabitah; Aung, Min Min; Mokhtar, Mohd Noriznan; Yunus, Robiah published the artcile< Synthesis and Characterization of Polyurethanes from Residual Palm Oil with High Poly-Unsaturated Fatty Acid Oils as Additive>, Application In Synthesis of 112-63-0, the main research area is palm oil polyurethane synthesis polyunsaturated fatty acid additive characterization; algae oil; bio-based polyurethanes; jatropha oil; recovered palm oil.

In the effort to produce renewable and biodegradable polymers, more studies are being undertaken to explore environmentally friendly sources to replace petroleum-based sources. The oil palm industry is not only the biggest vegetable-oil producer from crops but also one the biggest producers of residual oil that cannot be used for edible purposes due to its low quality. In this paper the development of biopolymers from residual palm oil, residual palm oil with 10% jatropha oil, and residual palm oil with 10% algae oil as additives were explored. Polyols from the different oils were prepared by epoxidation with peroxyacetic acid and alcoholysis under the same conditions and further reacted with polyisocyanate to form polyurethanes. Epoxidized oils, polyols and polyurethanes were analyzed by different techniques such as TGA, DSC, DMA, FTIR and H-NMR. Overall, although the IV of algae oil is slightly higher than that of jatropha oil, the usage of algae oil as additive into the residual palm oil was shown to significantly increase the hard segments and thermal stability of the bio polyurethane compared to the polymer with jatropha oil. Furthermore, when algae oil was mixed with the residual palm oil, it was possible to identify phosphate groups in the polyol which might enhance the fire-retardant properties of the final biopolymer.

Polymers (Basel, Switzerland) published new progress about Acid number. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Application In Synthesis of 112-63-0.

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

Grillet, Pierre-Edouard; Badiou, Stephanie; Lambert, Karen; Sutra, Thibault; Plawecki, Maelle; Raynaud de Mauverger, Eric; Brun, Jean-Frederic; Mercier, Jacques; Gouzi, Fares; Cristol, Jean-Paul published the artcile< Biomarkers of Redox Balance Adjusted to Exercise Intensity as a Useful Tool to Identify Patients at Risk of Muscle Disease through Exercise Test>, Name: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is risk assessment exercise intensity muscle disease; Liquid Chromatography tandem Mass Spectrometry (LC-MS/MS); cardiopulmonary exercise test (CPET); exercise intolerance; maximal oxygen uptake; metabolomics; myopathy; tricarboxylic citric acid cycle.

The screening of skeletal muscle diseases constitutes an unresolved challenge. Currently, exercise tests or plasmatic tests alone have shown limited performance in the screening of subjects with an increased risk of muscle oxidative metabolism impairment. Intensity-adjusted energy substrate levels of lactate (La), pyruvate (Pyr), β-hydroxybutyrate (BOH) and acetoacetate (AA) during a cardiopulmonary exercise test (CPET) could constitute alternative valid biomarkers to select “”at-risk”” patients, requiring the gold-standard diagnosis procedure through muscle biopsy. Thus, we aimed to test: (1) the validity of the V’O2-adjusted La, Pyr, BOH and AA during a CPET for the assessment of the muscle oxidative metabolism (exercise and mitochondrial respiration parameters); and (2) the discriminative value of the V’O2-adjusted energy and redox markers, as well as five other V’O2-adjusted TCA cycle-related metabolites, between healthy subjects, subjects with muscle complaints and muscle disease patients. Two hundred and thirty subjects with muscle complaints without diagnosis, nine patients with a diagnosed muscle disease and ten healthy subjects performed a CPET with blood assessments at rest, at the estimated 1st ventilatory threshold and at the maximal intensity. Twelve subjects with muscle complaints presenting a severe alteration of their profile underwent a muscle biopsy. The V’O2-adjusted plasma levels of La, Pyr, BOH and AA, and their resp. ratios showed significant correlations with functional and muscle fiber mitochondrial respiration parameters. Differences in exercise V’O2-adjusted La/Pyr, BOH, AA and BOH/AA were observed between healthy subjects, subjects with muscle complaints without diagnosis and muscle disease patients. The energy substrate and redox blood profile of complaining subjects with severe exercise intolerance matched the blood profile of muscle disease patients. Adding five tricarboxylic acid cycle intermediates did not improve the discriminative value of the intensity-adjusted energy and redox markers. The V’O2-adjusted La, Pyr, BOH, AA and their resp. ratios constitute valid muscle biomarkers that reveal similar blunted adaptations in muscle disease patients and in subjects with muscle complaints and severe exercise intolerance. A targeted metabolomic approach to improve the screening of at-risk patients is discussed.

Nutrients published new progress about Biopsy. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Name: (9Z,12Z)-Methyl octadeca-9,12-dienoate.

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

Zhao, Yi; Wang, Huiyun; Yin, Yanyan; Shi, Haoyu; Wang, Dong; Shu, Fengjue; Wang, Rongchun; Wang, Lingzhi published the artcile< Anti-melanoma action of small molecular peptides derived from Brucea javanica(L.)Merr. globulin in vitro>, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is dacarbazine anticancer agent Brucea malignant melanoma.

The morbidity of malignant melanoma keeps increasing annually. It has high risks of metastasis, drug resistance, and poor prognosis in clinics. Moreover, the available medicines used commonly, such as dacarbazine, temozolomide, the v-Raf murine sarcoma viral oncogene homolog B1 (BRAF) inhibitor vemurafenib, and the programmed cell death protein 1 inhibitor pembrolizumab, have some limitations at some extent. Therefore, a more effective therapeutic strategy is still urgently necessary. In Brucea javanica(L.)Merr globulins were hydrolyzed with pepsin, then ultra-filtrated to collect small mol. peptides (≤3 kDa). The peptides were then analyzed by anti-proliferative assay, cell-cycle distribution, apoptosis assay, and in vitro wound-scratch assay. Finally, western blotting was conducted to elucidate the underlying anti-melanoma mechanism. The small mol. peptid from B. javanica significantly inhibited malignant melanoma cell proliferation with the IC50 of 2.72 μg/mL for 72 h. Further anal. indicated that B. javanica peptides arrested cell cycle at the S and G2/M phases and induced apoptosis by upregulating p21, p53, Bax, caspase-3, and cleaved PARP while downregulating Bcl-2 expression. The inhibitory migration effects were also confirmed by wound-healing assay. The small mol. biopeptides from B. javanica may be a promising bioactive agent candidate for melanoma treatment.

Journal of Traditional Chinese Medical Sciences published new progress about Antitumor agents. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate.

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

Liu, Qian-Bao; Lu, Jing-Guang; Jiang, Zhi-Hong; Zhang, Wei; Li, Wen-Jia; Qian, Zheng-Ming; Bai, Li-Ping published the artcile< In situ chemical profiling and imaging of cultured and natural Cordyceps sinensis by TOF-SIMS>, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is Cordyceps fatty acid imaging secondary ion mass spectrometry; Cordyceps sinensis; chemical imaging; in situ analysis; time-of-flight secondary ion mass spectrometry; traditional Chinese medicines.

Time-of-flight secondary ion mass spectrometry (TOF-SIMS) is a sensitive surface anal. technol., which can simultaneously acquire diverse chem. components and their precise locations on the surfaces of samples without any requirements for chem. damage pretreatments or addnl. matrixes. Commonly, the quality control of TCMs (traditional Chinese medicines) is limited by the qual. and quant. evaluations of the specifically extractive constituents. In this study, a practical sample preparation strategy named two-layered media embedding sample preparation was developed to obtain ideal freezing sections of dried materials of Cordyceps sinensis. Meanwhile, the well-established sample preparation method was applied for in situ chem. profiling and imaging of natural (NCS) and cultured Cordyceps sinensis (CCS) by using TOF-SIMS. More than 200 components were tentatively identified and imaged in NCS and CCS at the same time. Mass spectrometry imaging revealed that most components have even distributions in caterpillars of Cordyceps sinensis, while TAGs, DAGs, MAGs, and FAs only have distributions outside caterpillars′ digestive chambers. This is the first time that components were in situ imaged for Cordyceps sinensis to exhibit the chem. distributions which have never been achieved by other anal. techniques so far. In addition, chemometrics was used to simplify and explain the massive TOF-SIMS mass data sets, which revealed the high chem. similarity between CCS and NCS. Furthermore, the relative quantification of TOF-SIMS data showed that CCS has comparable proportions of amino acids, nucleosides, monosaccharides, sphingolipids, sterols and other principles to NCS except for fatty acids, glycerides and glycerophospholipids. The higher amounts of TAGs and DAGs in CCS were confirmed by quant. 1H-NMR, indicating reliable relative quantification of TOF-SIMS. In general, our research developed a novel approach of TOF-SIMS for in situ chem. anal. of TCMs, and its successful application in comparative study of CCS and NCS suggested that TOF-SIMS is an advanced and promising anal. technol. for the research of TCMs.

Frontiers in Chemistry (Lausanne, Switzerland) published new progress about Amino acids Role: ANT (Analyte), BSU (Biological Study, Unclassified), ANST (Analytical Study), BIOL (Biological Study). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate.

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

Mohammad, Shabbair; Dhambri, Sabrina; Gori, Didier; Vaxelaire, Carine; Sorin, Geoffroy; Ardisson, Janick; Lannou, Marie-Isabelle published the artcile< Asymmetric Sharpless dihydroxylation reaction of chiral bishomoallylic alcohols: Application to the synthesis of the C1-C10-C5 fragment of FR225654>, Computed Properties of 112-63-0, the main research area is asym Sharpless dihydroxylation chiral bishomoallylic alc pyrimidine ligand.

Toward the synthesis of FR225654, an antidiabetic natural product, the Sharpless asym. dihydroxylation of chiral bishomoallylic alcs., never reported in the literature, was examined Employing the pyrimidine class of ligands, a high level of matched diastereoselectivity was obtained. An application to the stereoselective synthesis of the C1-C10-C5 fragment I of FR225654 was performed.

Synlett published new progress about Alcohols, chiral Role: RCT (Reactant), RACT (Reactant or Reagent) (bishomoallylic). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Computed Properties of 112-63-0.

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

Yu, Mei-xiang; Lei, Bo; Song, Xin; Huang, Yong-mei; Ma, Xiao-qin; Hao, Chen-xia; Yang, Wan-hua; Pan, Man-li published the artcile< Compound XiongShao Capsule ameliorates streptozotocin-induced diabetic peripheral neuropathy in rats via inhibiting apoptosis, oxidative - nitrosative stress and advanced glycation end products>, Electric Literature of 112-63-0, the main research area is compound XiongShao capsule plant extract neuroprotective agent apoptosis; nitroxidative stress diabetic peripheral neuropathy; Advanced glycation end products; BAX/BCL2–caspase-3; Compound XiongShao Capsule; Diabetic peripheral neuropathy; Oxidative – nitrosative stress.

Compound XiongShao Capsule (CXSC), a traditional herb formula, has been approved for using to treat diabetic peripheral neuropathy (DPN) by the Shanghai Food and Drug Administration, with significant efficacy in clinic. This study aimed to investigate the multidimensional pharmacol. mechanisms and synergism of CXSC against DPN in rats. The quality anal. of CXSC was performed by high-performance liquid chromatog. (HPLC) and thin-layer chromatog. Rats with DPNinduced by streptozotocin/high-fat diet for 4 wk were treated with CXSC at three doses (1.2 g/kg, 0.36 g/kg, and 0.12 g/kg), or epalrestat (15 mg/kg) daily for 8 wk continuously. During the treatment period, body weight, serum glucose levels, and nerve function, including nerve conduction velocity (NCV), and mech. and thermal hyperalgesia were tested and assessed every 4 wk. In the 13th week, the histopathol. examination in the sciatic nerve was performed using a transmission electron microscope. The expression of apoptosis-related proteins of BAX, BCL2, and caspase-3 in the sciatic nerve was examined using hematoxylin and eosin staining. The serum levels of advanced glycation end products (AGEs), oxidative-nitrosative stress biomarkers of superoxide dismutase (SOD), and nitric oxide synthase (NOS) were measured using a rat-specific ELISA kit. CXSC had no significant effect on body weight or serum glucose levels (P > 0.05), but it significantly improved mech. hyperalgesia (F5,36 = 18.24, P < 0.0001), thermal hyperalgesia (F5,36 = 8.45, P < 0.0001), and NCV (motor NCV: F5,36 = 7.644, P < 0.0001, sensory NCV: F5,36 = 12.83, P < 0.0001). Besides, it maintained myelin and axonal structure integrity, downregulated the expression of apoptosis-related proteins in the sciatic nerve tissue, reduced AGEs and NOS levels, and enhanced antioxidant enzyme SOD activities in the serum. CXSC exerted neuroprotective effects against rats with DPN through multidimensional pharmacol. mechanisms including antiapoptotic activity in the sciatic nerve and downregulation of the level of serum NOS, SOD and AGEs. Journal of Ethnopharmacology published new progress about Advanced glycosylation end products Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Electric Literature of 112-63-0.

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