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Search results for: ∆2-Androstene-1α,17β-diol� Acetate C21H32O3 CAS: 5846-70-8

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#34509840   2021/09/04 To Up

Acetate and electricity generation from methane in conductive fiber membrane- microbial fuel cells.

Microbial conversion of methane to electricity, fuels, and liquid chemicals has attracted much attention. However, due to the low solubility of methane, it is not considered a suitable substrate for microbial fuel cells (MFCs). In this study, a conductive fiber membrane (CFM) module was constructed as the bioanode of methane-driven MFCs, directly delivering methane. After biofilm formation on the CFM surface, a steady voltage output of 0.6 to 0.7 V was recorded, and the CFM-MFCs obtained a maximum power density of 64 ± 2 mW/m. Moreover, methane oxidation produced a high concentration of intermediate acetate (up to 7.1 mM). High-throughput 16S rRNA gene sequencing suggests that the microbial community was significantly changed after electricity generation. Methane-related archaea formed a symbiotic consortium with characterized electroactive bacteria and fermentative bacteria, suggesting a combination of three types of microorganisms for methane conversion into acetate and electricity.
Ya-Nan Bai, Fang Zhang, Lin-Peng Yu, Ya-Li Zhang, Yun Wu, Tai-Chu Lau, He-Ping Zhao, Raymond J Zeng

2614 related Products with: Acetate and electricity generation from methane in conductive fiber membrane- microbial fuel cells.

4 Membranes/Box4 Membranes/Box4 Membranes/Box100μg4 Membranes/Box96 assays4 Membranes/Box10 mg-1x10e7 cells4 Membranes/Box

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#34467579   2021/09/01 To Up

Screening and characterisation of potential antioxidant, hypoglycemic and hypolipidemic components revealed in Portulaca oleracea via multi-target affinity ultrafiltration LC-MS and molecular docking.

Portulaca oleracea is a commonly used nutritional vegetable and traditional herbal medicine with plenty of nutrients and manifold pharmacological activities. However, the potential active ingredients for its remarkable antioxidant, hypoglycemic and hypolipidemic activities remain unexplored.
Hui Zhang, Guilin Chen, Jinpeng Yang, Chunlei Yang, Mingquan Guo

2595 related Products with: Screening and characterisation of potential antioxidant, hypoglycemic and hypolipidemic components revealed in Portulaca oleracea via multi-target affinity ultrafiltration LC-MS and molecular docking.

25 mg10 mg500 mg 5 G100ug200 5 G200ug25 mg96 wells (1 kit)1 g10 mg

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#34453896   2021/08/25 To Up

Effects of different carbon sources on the efficiency of sulfur-oxidizing denitrifying microorganisms.

This study aims to compare the effects of different carbon sources on sulfur-oxidizing denitrifying microorganisms by using glucose, ethanol, and acetate as carbon sources. Under the same chemical oxygen demand Cr (COD), nitrate, and sulfide concentrations, the removal rate of nitrate and total organic carbon, and the yield of elemental sulfur in a static experiment and a continuous flow reactor with glucose as the carbon source were lower than those with ethanol and acetic acid as the carbon source. The core sulfur-oxidizing denitrifying bacteria that use glucose as the carbon source were Azoarcus, Geoalkalibacter, and Mangroviflexus; those that use ethanol as the carbon source were Arcobacter, Pseudomonas, and Thauera; those that use acetate as the carbon source were Pseudomonas and Azoarcus. The metabolic activity of microorganisms that use different carbon sources was explained by functional gene detection. The fluctuation of gltA, a functional gene indicating heterotrophic metabolism of microorganisms, was small in three reactors, but that of the sulfur oxidation gene, Sqr, in the reactor with acetic acid as the carbon source was larger. Our results suggest that acetate is a more suitable carbon source for denitrification-desulfurization systems.
Shuang Gao, Zhiling Li, Yanan Hou, Aijie Wang, Qian Liu, Cong Huang

2825 related Products with: Effects of different carbon sources on the efficiency of sulfur-oxidizing denitrifying microorganisms.

5 G500IU 500 ml 2 ml Ready-to-use 3x 500 ml1 g100ug Lyophilized1 mg 100 G5 mg10 ug

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#34364957   2021/08/05 To Up

RIFM fragrance ingredient safety assessment, pinocarvyl acetate, CAS Registry Number 1078-95-1.


A M Api, D Belsito, D Botelho, M Bruze, G A Burton, J Buschmann, M A Cancellieri, M L Dagli, M Date, W Dekant, C Deodhar, A D Fryer, L Jones, K Joshi, M Kumar, A Lapczynski, M Lavelle, I Lee, D C Liebler, H Moustakas, M Na, T M Penning, G Ritacco, J Romine, N Sadekar, T W Schultz, D Selechnik, F Siddiqi, I G Sipes, G Sullivan, Y Thakkar, Y Tokura

1277 related Products with: RIFM fragrance ingredient safety assessment, pinocarvyl acetate, CAS Registry Number 1078-95-1.

1KG 1KG 100 G 100 G 1KG 100 G 25 G 5 MG 500 G 25 G 1KG 5 G

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#34363882   2021/08/04 To Up

RIFM fragrance ingredient safety assessment, dihydrocarvyl acetate, CAS Registry Number 20777-49-5.

The existing information supports the use of this material as described in this safety assessment. Dihydrocarvyl acetate was evaluated for genotoxicity, repeated dose toxicity, reproductive toxicity, local respiratory toxicity, phototoxicity/photoallergenicity, skin sensitization, and environmental safety. Data from read-across analogs dihydrocarveol (isomer unspecified) (CAS # 619-01-2) and acetic acid (CAS # 64-19-7) show that dihydrocarvyl acetate is not expected to be genotoxic. Data on read-across analogs isopulegol (CAS # 89-79-2) and acetic acid (CAS # 64-19-7 provide a calculated MOE >100 for the repeated dose toxicity endpoint. The reproductive and local respiratory toxicity endpoints were evaluated using the TTC for a Cramer Class I material, and the exposure to dihydrocarvyl acetate is below the TTC (0.03 mg/kg/day and 1.4 mg/day, respectively). Data from read-across analog 4-methyl-8-methylenetricyclo [3.3.1.(3,7)]decan-2-yl acetate (CAS # 122,760-85-4) provided dihydrocarvyl acetate a NESIL of 2500 μg/cm for the skin sensitization endpoint. The phototoxicity/photoallergenicity endpoints were evaluated based on UV/Vis spectra; dihydrocarvyl acetate is not expected to be phototoxic/photoallergenic. The environmental endpoints were evaluated; dihydrocarvyl acetate was found not to be PBT as per the IFRA Environmental Standards, and its risk quotients, based on its current volume of use in Europe and North America (i.e., PEC/PNEC), are <1.
A M Api, D Belsito, D Botelho, M Bruze, G A Burton, J Buschmann, M A Cancellieri, M L Dagli, M Date, W Dekant, C Deodhar, A D Fryer, L Jones, K Joshi, M Kumar, A Lapczynski, M Lavelle, I Lee, D C Liebler, H Moustakas, M Na, T M Penning, G Ritacco, J Romine, N Sadekar, T W Schultz, D Selechnik, F Siddiqi, I G Sipes, G Sullivan, Y Thakkar, Y Tokura

1895 related Products with: RIFM fragrance ingredient safety assessment, dihydrocarvyl acetate, CAS Registry Number 20777-49-5.

25 G 1KG 5 G 1 G 100 G 1KG 100 G 5 G 1KG 1KG 100 G 100 G

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#34358606   2021/08/03 To Up

RIFM fragrance ingredient safety assessment, isopulegyl acetate, CAS Registry Number 57576-09-7.


A M Api, D Belsito, D Botelho, M Bruze, G A Burton, J Buschmann, M A Cancellieri, M L Dagli, M Date, W Dekant, C Deodhar, A D Fryer, L Jones, K Joshi, M Kumar, A Lapczynski, M Lavelle, I Lee, D C Liebler, H Moustakas, M Na, T M Penning, G Ritacco, J Romine, N Sadekar, T W Schultz, D Selechnik, F Siddiqi, I G Sipes, G Sullivan, Y Thakkar, Y Tokura

1038 related Products with: RIFM fragrance ingredient safety assessment, isopulegyl acetate, CAS Registry Number 57576-09-7.

25 G 1KG 5 G 1 G 100 G 1KG 100 G 5 G 1KG 1KG 100 G 100 G

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#34343279   2021/08/03 To Up

Efficient One-Step Separation of Five Flavonoids from the Crude Extract of the Waste Pomace of Sea Buckthorn Berries through Counter-Current Chromatography.

The pomace of sea buckthorn berries is usually discarded when transforming into nonalcoholic or alcoholic beverages, jellies, jams, juices, candies and dairy products. Here, we established a promising approach for one step separation of five flavonoids from the waste pomace of sea buckthorn berries through counter-current chromatography. The crude extract of waste pomace of sea buckthorn berries after juicing was injected into counter-current chromatography with hexane/ethyl acetate/ethanol/water (v/v/v/v, 5:7:5:7) as the solvent system. As a result, five flavonoids, including quercetin, laricitrin, isorhamnetin-7-O-rhamnoside, kaempferol and isorhamnetin, were obtained in a single step separation. Our finding showed that ethanol is a good substitute for methanol to regulate the partition coefficient in hexane/ethyl acetate/ methanol/water system. This study provided a significant measure to utilize the waste pomace of Sea buckthorn berries.
Tao Chen, Shuo Wang, Hongmei Li, Cheng Shen, Shuping Yan, Yangfei Wei, Zhibo Song, Peipei Li, Yulin Li

1202 related Products with: Efficient One-Step Separation of Five Flavonoids from the Crude Extract of the Waste Pomace of Sea Buckthorn Berries through Counter-Current Chromatography.

5 G11mg1 ml2000 IU100.00 ul1500 Units

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#34298332   2021/07/16 To Up

The synergistic effect of rumen cellulolytic bacteria and activated carbon on thermophilic digestion of cornstalk.

To explore the bioaugmentation of rumen cellulolytic bacteria (RCB) and activated carbon (AC) on thermophilic digestion of cornstalk, biochemical methane potential tests were carried out. Adding RCB or AC can improve methane production, while simultaneous existence of AC (10 g/L) and RCB (5%) obtained the best performance. The maximum cellulose degradation rate, methane production rate and methane yield were 66.92%, 32.2 L/(kgVS·d), and 144.9 L/kgVS, which increased by 30.23%, 51.17%, and 20.35% compared with control group. The cellulolytic and fermentative bacteria (Hydrogenispora), syntrophic acetate-oxidizing bacteria (norank_o_MBA03), and hydrogenotrophic Methanothermobacter were crucial for thermophilic digestion of cornstalk. The enhancement of AC was due to the enrichment of Hydrogenispora and Methanothermobacter, while RCB can increase the abundance of cellulolytic bacteria (Halocella and norank_o_M55-D21) and mixotrophic Methanosarcina. The synergetic effect of AC and RCB owing to the enriched cellulolytic bacteria, the enhanced syntrophic acetate oxidation and the concentrated carbon metabolic flow to methane.
Zhijie Xie, Xianghui Meng, Hongxia Ding, Qin Cao, Yichao Chen, Xiaofeng Liu, Dong Li

1551 related Products with: The synergistic effect of rumen cellulolytic bacteria and activated carbon on thermophilic digestion of cornstalk.

5 G 2 ml 1000 tests100 25 mg50mg0.1 mg 1 kit(s) 1 ml100ug0.1 mg

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#34297483   2021/07/23 To Up

Revisiting the sex pheromone of the fall armyworm Spodoptera frugiperda, a new invasive pest in South China.

The fall armyworm Spodoptera frugiperda is a worldwide serious agricultural pest, and recently invades in South China. Sex pheromone can be employed to monitor its population dynamics accurately in the field. However, the pheromone components previously reported by testing different geographic populations and strains are not consistent. On the basis of confirming that the S. frugiperda population from Yunnan province belonged to the corn strain, we analyzed the potential sex pheromone components in the pheromone gland extracts of females using the gas chromatography coupled with electroantennographic detection (GC-EAD), gas chromatography coupled with mass spectrometry (GC-MS) and electroantennography (EAG). The results show that (Z)-9-tetradecenal acetate (Z9-14:Ac), (Z)-11-hexadecenyl acetate (Z11-16:Ac), (Z)-7-dodecenyl acetate (Z7-12:Ac) or (E)-7-dodecenyl acetate (E7-12:Ac) with a ratio of 100: 15.8: 3.9 induced EAD responses to varying degree: Z9-14:Ac elicited a strong EAD response, Z7-12:Ac or E7-12:Ac elicited a small but clear EAD response, while Z11-16:Ac elicited a weak EAD response. The further single sensillum recording (SSR) showed that Z9-14:Ac and Z7-12:Ac induced dose-dependent activities in two types (A and B) of sensilla in male antennae, respectively, while the sensilla in response to E7-12:Ac and Z11-16:Ac was not recorded. Finally, wind tunnel tests reveal that Z9-14:Ac and Z7-12:Ac are two principal sex pheromone components of the tested population. This article is protected by copyright. All rights reserved.
Nan-Ji Jiang, Bao-Tong Mo, Hao Guo, Jun Yang, Rui Tang, Chen-Zhu Wang

1861 related Products with: Revisiting the sex pheromone of the fall armyworm Spodoptera frugiperda, a new invasive pest in South China.

10.1 mg

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#34213250   // To Up

[Preparation of brazilein from by high performance countercurrent chromatography].

Brazilein is among the main chemical constituents of . It has diverse pharmacological activities. Modern pharmacological studies have shown that the compound has antitumor, anti-inflammatory, antibacterial, antioxidant, immunomodulatory, and other pharmacological activities. Brazilein is often used as a stain in various industries. The separation of brazilein by traditional column chromatography will not only result in contamination of the chromatographic column materials, but also lead to loss of the active ingredient. Countercurrent chromatography is an advanced liquid-liquid chromatographic separation technique. It has been widely used for natural product separation and isolation as it offers several advantages, such as low solvent consumption, a highly selective solvent system, and high recoveries. Typical countercurrent chromatography techniques include centrifugal partition chromatography (CPC), high-speed countercurrent chromatography (HSCCC), and high performance countercurrent chromatography (HPCCC). It is well known that choosing a suitable solvent system is vital in countercurrent separation. Therefore, two methods were introduced for choosing a suitable solvent system. One is the generally useful estimation of solvent systems (GUESS) method, which employs thin-layer chromatography (TLC) to identify a suitable solvent system with minimal labor for the rapid purification of target compounds, and another is the Shake-Flash method. The solvent system could be determined by observing the distribution of the sample in the upper and lower phases. Two kinds of solvent systems were screened using the TLC-GUESS and Shake-Flash methods, and tested through the analysis mode of the HPCCC instrument. The results showed that chloroform-methanol-water (4:3:2, v/v/v) was the optimal solvent system for HPCCC separation. A total of 15.2 mg of brazilein and 5.7 mg of caesappanin C were obtained from an ethyl acetate extract with high purities (95.6% and 89.0%, analyzed by HPLC) in one step using the preparation mode of HPCCC, the reversed-phase liquid chromatography mode with the apparatus rotated at 1600 r/min, a flow rate of 10 mL/min, separation temperature of 25℃, and detection wavelength of 285 nm. Their structures were determined by spectroscopic and spectrometric analyses. Brazilein stained the solid packing material in the column and was difficult to elute. The results showed that the use of HPCCC for the separation of brazilein can not only prevent the loss of target active ingredients in , but also shorten the separation and purification times and improve the operating efficiency. Therefore, HPCCC can be used for the separation and preparation of other pigment compounds in and other dye plants.
Wenqian He, Qingfei Fan, Lan Zhou, Fengmei Huang, Xian Jiang, Zhi Na, Huabin Hu, Qishi Song

2712 related Products with: [Preparation of brazilein from by high performance countercurrent chromatography].

1000 assays96 Tests/kit4 Arrays/Slide2 Sample Kit25 6 ml Ready-to-use 100μl1x96 well plate4 Membranes/Box

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