Month: October 2022

Chen, Chun-Kai; Lin, Yan-Cheng; Hsu, Li-Che; Ho, Jin-Chieh; Ueda, Mitsuru; Chen, Wen-Chang published the artcile< High Performance Biomass-Based Polyimides for Flexible Electronic Applications>, Formula: C8H4O6, the main research area is biomass biodegradable polyimide flexible electronic OFET.

Biobased polymers have received extensive research attention in flexible and renewable electronics to meet the concept of environmental sustainability. In this study, we develop a series of new polyimides (PIs) from biosources to serve as the substrate and dielecs. for a flexible organic field-effect transistor (OFET). The bioderived diamine, (3R,6S)-hexahydrofuro[3,2-b]furan-3,6-diyl bis(4-aminobenzoate) (ISBA), synthesized from isosorbide (ISB), was reacted with three dianhydrides of pyromellitic dianhydride (PMDA), 3,3′,4,4′-biphenyl-tetracarboxylic dianhydride (BPDA), and cyclobutane-1,2,3,4-tetracarboxylic dianhydride (CBDA) to obtain PIs and copolyimides (Co-PIs) with a high biomass content up to 53%. These bioderived PIs possessed high Td’s over 400°C and Tg’s over 250°C. Furthermore, the CBDA-based and PMDA-based PIs exhibited CTE values below 50 ppm K-1 due to the rigid heterocyclic ISB unit and the structural linearity of the CBDA and PMDA moieties in the polymer backbone. High transparency and low coloration were also observed in the biobased PIs. Finally, highly thermal-resistant PI(ISBA-C95B5) consisting of the CBDA/BPDA mole ratio of 95/5 was applied as the substrate and dielecs. in flexible OFET, demonstrating the compatible and stable performance even after being baked at 200°C for 2 h or 1000 bending cycles. The present study reveals the potential application of biobased PIs in electronic devices for a sustainable economy.

ACS Sustainable Chemistry & Engineering published new progress about Biodegradable materials. 4415-87-6 belongs to class tetrahydrofurans, and the molecular formula is C8H4O6, Formula: C8H4O6.

Referemce:
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem

Datta, Soumendra N; Chalokia, Ramandeep S; Wing, K W; Patel, K; Solanki, R; Desai, Janak published the artcile< Ultramini-percutaneous nephrolithotomy versus retrograde intrarenal surgery in the treatment of 10-30 mm calculi: a randomized controlled trial.>, HPLC of Formula: 58-97-9, the main research area is Minimal invasive management of renal calculi; Randomized controlled trial; Retrograde intrarenal surgery (RIRS); Ultramini-percutaneous nephrolithotomy (UMP).

The surgical management of renal stones 10-30 mm is usually performed with percutaneous nephrolithotomy (PCNL) and retrograde intrarenal surgery (RIRS). Standard form of percutaneous nephrolithotomy has paved the way for miniaturized PCNL in many centres. We wanted to evaluate the efficacy, safety and the cost-effectiveness of ultramini-percutaneous nephrolithotomy (UMP) versus RIRS in the treatment of renal stones with stone burden 10-30 mm. Patients with renal stone burden 10-30 mm were prospectively randomized into either UMP or RIRS. The demographic data, stone characteristic, operative time and cost of the equipment were recorded. The stone free status, analgesic requirement, deterioration of the renal function and hemoglobin and the postoperative complications as per Clavein-Dindo grade were recorded. One hundred and fifty patients met inclusion criteria. Out of these 98 underwent UMP and 46 RIRS. Six withdrew the consent before the procedure. Mean stone size was comparable in either of the groups. Mean laser time and stone extraction time was significantly less for UMP compared to RIRS (41.17 min versus 73.58 min p < 0.0001). Mean consumable costs in the UMP group were considerably less at US$45.73 compared to the RIRS group at $423.11 (p < 0.0001). The stone free rates at 1 month of follow-up were 100% for UMP group and 73% for RIRS group. There were insignificant changes to mean hemoglobin and glomerular filtration rate (GFR) in all patients and the average length of the stay was similar in both the groups. The postoperative complications revealed Grade I and II rate of 10% in the UMP group and 35% in the RIRS group, respectively. We concluded that UMP to be safe, effective and more economical to the RIRS for renal stones up to 3 cm in size.Trial registered with ISRCTN registry ID ISRCTN20935105, Retrospective. Urolithiasis published new progress about 58-97-9. 58-97-9 belongs to class tetrahydrofurans, and the molecular formula is C9H13N2O9P, HPLC of Formula: 58-97-9.

Referemce:
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem

Xie, Chun-yan; Wang, Qinhua; Li, Guanya; Fan, Zhiyong; Wang, Hong; Wu, Xin published the artcile< Dietary supplement with nucleotides in the form of uridine monophosphate or uridine stimulate intestinal development and promote nucleotide transport in weaned piglets>, Category: tetrahydrofurans, the main research area is piglet UMP uridine dietary supplement intestine development nucleotide transport; intestinal development; uridine; uridine monophosphate; weaned piglets.

BACKGROUND : Nucleotides are key constituents of milk, where they are utilized in cell replication, although there are limited studies for weaned piglets. This study evaluated the effects of uridine monophosphate (UMP) with uridine (UR) feed supplementation on the intestinal development and nucleotide transport in weaned piglets. RESULTS : Supplementation with UMP significantly increased (P ≤ 0.05) plasma glucose, and UR supplementation significantly reduced (0.05 ≤ P ≤ 0.10) the plasma total cholesterol (TC) of piglets when compared with that of the control group, although non-significant difference (P ≥ 0.05) in growth performance was observed among three groups. Piglets fed supplementary UR exhibited greater (P ≤ 0.05) crypt depth in the duodenum and ileum when compared with those in the supplementary UMP and control groups. Real-time quant. polymerase chain reaction (RT-qPCR) results revealed that UR supplementation increased (P ≤ 0.05) the relative mRNA levels of genes encoding the transmembrane proteins ZO-1 and occludin in the duodenum mucosa, and ZO-1 in the jejunum mucosa (P ≤ 0.05). Similarly, UR supplementation increased (P ≤ 0.05) expression of solute carriers SLC28A1 and SLC29A1 in the duodenum mucosa. Conversely, claudin-1 expression in the duodenum mucosa was inhibited (P ≤ 0.05) by dietary supplementation with UMP or UR. CONCLUSION : Collectively, our data indicated that dietary supplementation with UMP or UR was conducive to stimulating intestinal development and promoting nucleotide transport in weaned piglets.

Journal of the Science of Food and Agriculture published new progress about Body weight. 58-97-9 belongs to class tetrahydrofurans, and the molecular formula is C9H13N2O9P, Category: tetrahydrofurans.

Referemce:
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem

Pirmoradi, Maryam; Janulaitis, Nida; Gulotty, Robert J. Jr; Kastner, James R. published the artcile< Bi-Metal-Supported Activated Carbon Monolith Catalysts for Selective Hydrogenation of Furfural>, Formula: C5H10O2, the main research area is bi metal supported carbon monolith catalyst hydrogenation furfural.

Activated carbon monolith (ACM) catalysts were impregnated with Pd, Pd-Cu, and Pd-Fe for continuous hydrogenation of aqueous furfural (FUR). The effect of temperature, pressure, and liquid residence time on product selectivity and space-time yield (STY) was determined Adding a second metal to Pd/ACM shifted the selectivity of the catalyst from 2-methylfuran (2MF) and 2-methyltetrahydrofuran (2MTHF) to furfuryl alc. (FA) and tetrahydrofurfuryl alc. (THFA), resp., over the range of tested temperatures and pressures. High STYs of 272 g/Lcat/h (1089 g/kg-cat/h) for THFA and 143 g/Lcat/h (574 g/kg-cat/h) for FA were achieved using Pd-Fe/ACM at 180°C and 300 psig. Similarly, adding Fe increased the FUR, FA, and THFA turnover frequency by a factor of 3, 4, and 60, resp. The effect was not as pronounced when adding Cu. The effect of acetic acid, an impurity present in crude FUR, on FUR conversion and product selectivity was determined The surface area anal. indicated a relatively low loss of surface area over 13 hydrogenation reactions on each catalyst. The presence of a second metal on the monolith catalyst stabilized the Pd particles, reduced the leaching, and altered the product selectivity.

Industrial & Engineering Chemistry Research published new progress about Hydrogenation. 97-99-4 belongs to class tetrahydrofurans, and the molecular formula is C5H10O2, Formula: C5H10O2.

Referemce:
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem

Nazarski, Ryszard B. published the artcile< Physical image vs structure relation: part 12 - structure of 2,2,5,5-tetramethyl-dihydro-furan-3-one oxime and its protonated forms through isomerization and NMR spectra>, Safety of 2,2,5,5-Tetramethyldihydrofuran-3(2H)-one, the main research area is structure methyldihydrofuranone oxime protonated form thermal isomerization NMR GIAO.

The study of an isomeric A/B mixture of the title oxime 1, by photolytic or thermal E,Z-isomerization and NMR measurement including 1H{1H}-NOE difference spectra, led to assignment of the E configuration to its predominating form A. The 1H/13C data were interpreted in terms of steric overcrowding of both forms, especially of the thermolabile photoproduct B. Four classical (empirical) NMR methods of elucidating the oxime geometry were critically tested on these results. Unexpected vapor-phase photoconversion A→B in the window glass-filtered solar UV and spectroscopic findings on their protonated states were discussed, as well. The kinetically controlled formation of the N-protonated species (Z)-5+ was proved exptl. In addition, some 1H NMR assignments reported for structurally similar systems were rationalized (3 and 4) or revised (1 and 7-9) with the GIAO-DFT(B3LYP) and/or GIAO-HF calculational results.

Journal of Physical Organic Chemistry published new progress about Cis-trans thermal isomerization. 5455-94-7 belongs to class tetrahydrofurans, and the molecular formula is C8H14O2, Safety of 2,2,5,5-Tetramethyldihydrofuran-3(2H)-one.

Referemce:
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem

Yeh, Jyun-Yi; Matsagar, Babasaheb M.; S. Chen, Season; Sung, Hsiang-Ling; Tsang, Daniel C. W.; Li, Yi-Pei; Wu, Kevin C.-W. published the artcile< Synergistic effects of Pt-embedded, MIL-53-derived catalysts (Pt@Al2O3) and NaBH4 for water-mediated hydrogenolysis of biomass-derived furfural to 1,5-pentanediol at near-ambient temperature>, Formula: C5H10O2, the main research area is synergistic platinum embedded catalyst Al2O3 NaBH4 hydrogenolysis biomass.

We demonstrate an effective and selective conversion of biomass-derived furfural (FAL) to 1,5-pentanediol (1,5-PD) with high yields through a water-mediated hydrogenolysis process under mild reaction conditions (45°C, aqueous media). A novel alumina-supported platinum catalyst (Pt@Al2O3) with high-loading and uniform distribution of Pt nanoparticles is prepared through in situ synthesis of Pt-embedded metal-organic frameworks (i.e., MIL-53(Al)-NH2). As a typical example, a high yield of 75.2% 1,5-PD can be achieved from FAL conversion. A possible reaction mechanism is proposed based on the exptl. and computational findings, including XPS anal., kinetic studies, acidity measurements, and d. functional theory (DFT) calculations The high effectiveness of the proposed system is attributed to (1) the strong metal support interaction (SMSI) between Pt and penta-coordination aluminum, and (2) the synergistic effects of Bronsted acidic alumina support and the presence of sodium metaborate (NaBO2). Sodium borohydride (NaBH4) acts as both a hydrogen donor and a precursor for NaBO2, which results in an exclusive FAL to 1,5-PD (i.e., no 1,2-pentanediol) by regulating the water-mediated hydrogenolysis pathway as revealed by experiments and DFT calculations The reaction strategy proposed in this study has also manifested remarkable versatility for a wide range of furan derivatives

Journal of Catalysis published new progress about Biomass. 97-99-4 belongs to class tetrahydrofurans, and the molecular formula is C5H10O2, Formula: C5H10O2.

Referemce:
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem

Tang, Feiying; Wang, Liqiang; Dessie Walle, Maru; Mustapha, Abdulhadi; Liu, You-Nian published the artcile< An alloy chemistry strategy to tailoring the d-band center of Ni by Cu for efficient and selective catalytic hydrogenation of furfural>, Category: tetrahydrofurans, the main research area is nickel copper alloy catalyst furfural hydrogenation morphol textural property.

Nickel is a promising catalyst for the hydrogenation of furfural (FA) into furfuryl alc. (FOL) and tetrahydrofurfuryl alc. (TFOL). However, slow H* desorption and low catalytic selectivity limit its practical application. Herein, we employed an alloying strategy to tailoring the d-band center of Ni by Cu for efficient and selective catalytic hydrogenation of furfural. A series of Ni-Cu alloy catalysts (NiCux/C) were prepared by pyrolyzing NiCux-BTC (a MOF containing Cu and Ni) precursors. Theor. calculation demonstrates that Ni exhibits a downshifted d-band center once alloyed by Cu. This change can not only promote the desorption of H from Ni surface to improve the catalytic activity but also thermodynamically favor the transformation of adsorption orientation of FA (from a flat orientation on Ni to a tilted one on Ni-Cu alloy) to enable the selective conversion of FA into FOL or TFOL on demand. NiCu0.33/C catalyst exhibits enhanced activity and selectivity for FA hydrogenation compared to pure Ni and Cu.

Journal of Catalysis published new progress about Density of states. 97-99-4 belongs to class tetrahydrofurans, and the molecular formula is C5H10O2, Category: tetrahydrofurans.

Referemce:
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem

Shirali, Aditya S; Zagzag, Jonathan; Chiang, Yi-Ju; Huang, He; Zhang, Miao; Habra, Mouhammed Amir; Grubbs, Elizabeth G; Fisher, Sarah B; Perrier, Nancy D; Lee, Jeffrey E; Graham, Paul H published the artcile< Differences in Clinicopathologic Behavior of Oncocytic Adrenocortical Neoplasms and Conventional Adrenocortical Carcinomas.>, Electric Literature of 58-97-9, the main research area is .

BACKGROUND: Oncocytic adrenocortical neoplasms (OANs) are rare endocrine tumors that present as a spectrum from benign to malignant. The outcomes after surgical resection of the oncocytic variant of adrenocortical carcinoma remain poorly understood. We sought to characterize the clinicopathologic features of OAN and compare oncocytic adrenocortical carcinoma (OAC) with conventional adrenocortical carcinoma (ACC). PATIENTS AND METHODS: Adult patients who underwent adrenalectomy for OAN or ACC between January 1990 and September 2020 were identified. Demographics, clinicopathologic factors, American Joint Committee on Cancer stage, and cancer-related outcomes were reviewed. A matched cohort analysis of disease-free survival (DFS) and overall survival (OS) was performed between patients with OACs and those with ACCs. RESULTS: Forty-one patients with OAN and 214 patients with ACC were included. The OAN cohort median age was 45.2 years [interquartile ratio (IQR) 38.5-54.0 years], and 61.0% were female. OANs were benign (n = 11), of uncertain malignant potential (UMP, n = 9), or OAC (n = 21). Disease recurrence occurred in 12 (57.1%) patients with OAC compared with 1 (11.1%) and 0 patients with UMP or benign OAN, respectively (p < 0.001). Seven (33.3%) patients with OAC died during follow-up compared with 0 patients with UMP or benign OAN (p = 0.020). Kaplan-Meier survival analysis found no difference in DFS between ACC and OAC groups before (p = 0.218) and after 2:1 matching (p = 0.417). Overall survival was shorter for patients who had ACC compared with those who had OAC (p = 0.031), but the difference was not evident with matched analysis (p = 0.200). CONCLUSIONS: OAN presents as a spectrum from benign indolent tumors to aggressive carcinomas. OACs demonstrate similar clinicopathologic behavior and recurrence-free and overall survival when matched to conventional ACCs. Annals of surgical oncology published new progress about 58-97-9. 58-97-9 belongs to class tetrahydrofurans, and the molecular formula is C9H13N2O9P, Electric Literature of 58-97-9.

Referemce:
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem

Sornkamnerd, Saranyoo; Sasaki, Shuhei; Mitsumata, Tetsu; Takada, Kenji; Okada, Tomohiro; Ando, Shinji; Kaneko, Tatsuo published the artcile< Orientation Analysis of Polymer Chains in Optically Transparent Biopolyimides Having Rigid and Bending Backbones>, Electric Literature of 4415-87-6, the main research area is optically transparent biopolyimide polymer chain orientation.

Optically transparent and heat-resistant polymer films are useful in the field of organic glasses usable for elec. insulators for panels, windows, optical devices, etc. A series of biopolyimides having non-π-conjugated backbones prepared using a renewable diamine, 4,4′-diaminotruxillic acid di-Me esters, and various dianhydride monomers were prepared and cast onto substrates to form transparent films with high heat resistances and good elec. resistance. The second order orientation coefficients (P200) of the biopolyimide films were evaluated by polarized attenuated total reflection Fourier-transform IR spectroscopy, and the P200 values for the C-N stretching vibrations at a wavenumber of 1365 cm-1 displayed a good correlation with that for the aromatic C-C stretching at 1510 cm-1, regardless of the dianhydride structure. The in-plane/out-of-plane birefringence and coefficients of linear thermal expansion exhibited strong correlations with P200 except for those of a few samples. Most of the biopolyimide films exhibited good transparencies with low birefringence and high elec. resistance, which are applicable to flexible substrates with a low coefficient of thermal expansion for panel displays.

ChemistrySelect published new progress about Birefringence. 4415-87-6 belongs to class tetrahydrofurans, and the molecular formula is C8H4O6, Electric Literature of 4415-87-6.

Referemce:
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem

Lens, Sabela; Lazarus, Jeffrey V published the artcile< The paediatric population: the forgotten element to eliminating hepatitis C virus.>, Recommanded Product: ((2R,3S,4R,5R)-5-(2,4-Dioxo-3,4-dihydropyrimidin-1(2H)-yl)-3,4-dihydroxytetrahydrofuran-2-yl)methyl dihydrogen phosphate, the main research area is .

There is no abstract available for this document.

The lancet. Gastroenterology & hepatology published new progress about 58-97-9. 58-97-9 belongs to class tetrahydrofurans, and the molecular formula is C9H13N2O9P, Recommanded Product: ((2R,3S,4R,5R)-5-(2,4-Dioxo-3,4-dihydropyrimidin-1(2H)-yl)-3,4-dihydroxytetrahydrofuran-2-yl)methyl dihydrogen phosphate.

Referemce:
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem