Synthesis of 1-(β-coumarinyl)-1-(β-indolyl)trifluoroethanols through regioselective Friedel–Crafts alkylation of indoles with β-(trifluoroacetyl)coumarins catalyzed by Sc(OTf)3

ABSTRACT Runtunuwu, S.D. et al. 2008. Assembling Hybrid Coconut of GSK x DMT Based on RAPD (RANDOMLY AMPLIFIED POLYMORPHIC DNA) Marker. Eugenia 14 (1) : 134-152. The aimed of this research was : 1. assembling hybrid coconut GSK x DMT (Genjah Salak x Dalam Mapanget) that seeds growth was relatifly homogeneous based on RAPD (Randomly Amplified Polymorphic DNA) marker and 2. to found the assembling method of hybrid coconut that will produce massive seeds relatifely short time will homogeneous plant. It was 65 individu trees observe for the average of famale flower per bunch. The result was 25 individu of coconut GSK has the average flower production > 40 per bunch was analyze the homogeneous genetic with the RAPD marker. Based on the analyze RAPD that were 25 individu of GSK coconut trees have the same genetic average 88 % and 14 individu among that was 100 % have same genetic. Further more that 14 individu of GSK was crossing with the 3 individu of DMT that have high yield per year its was DMT 1188, 1172 and 781. Based on the evaluation for the color of buds, high of buds, the steam circle, the petiole color and the germination time of hybrid coconut seeds from the crossing of GSK x DMT 1188 produce more than 70 % seeds that have same genetic, also for crossing of GSK x DMT 1172 have 9 combination and have more than 70 % that same genetic, 10 combination from crossing GSK x DMT 781 have more than 80 % same seeds growth. Therefore, using the RAPD marker were successfully produced 28 crossing of the hybrid coconut GSK x DMT that have relatifly homogeneous seeds growth. Keywords : assembling, hybrid coconut GSK x DMT, RAPD.

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Microwave synthesis, photophysical properties of novel fluorescent iminocoumarins and their application in textile printing

Pigment & Resin Technology ◽

10.1108/prt-04-2014-0029 ◽

2015 ◽

Vol 44 (2) ◽

pp. 87-93 ◽

Cited By ~ 5

Author(s):

G.H. Elgemeie ◽

K.A. Ahmed ◽

E.A. ahmed ◽

M.H. helal ◽

D.M. Masoud

Keyword(s):

Blue Light ◽

Microwave Synthesis ◽

Photophysical Properties ◽

Ethyl Cyanoacetate ◽

High Yield ◽

The Novel ◽

Dioxane Solution ◽

Content Type ◽

Textile Printing ◽

Short Time

Purpose – This paper aims to synthesise coumarine flourescent dyes from a cheap material in a very short time with a very high yield, and by using a clean green chemistry. Design/methodology/approach – Efficient microwave synthesis for some novel iminocoumarins starts from the reaction of p-phenyl-enediamine and ethyl cyanoacetate followed by cyclocondensation with salicylaldehyde derivatives. Findings – The synthesized iminocoumarine compounds were characterized by spectroscopic methods. Absorption and fluorescence spectra of the compounds were also recorded. All compounds were fluorescent in 1,4-dioxane solution, they all emitted blue light (440-460 nm). The printing properties were studied, and their applications on printing polyester and polyamide fabrics were studied by silk screen printing. Originality/value – The authors designed efficient microwavel synthesis for some novel iminocoumarine derivatives; The novel procedure features short-reaction time, moderate yields and simple workup; All compounds were fluorescent in 1,4-dioxane solution, and they all emitted blue light; The authors studied their application in printing polyester and polyamide fabrics.

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Studies on 203Hg-Chlormerodrin Rapid Synthesis and Measurement of 203Hg-Chlormerodrin and Determination of its Fate in Rats

Nuklearmedizin ◽

10.1055/s-0038-1624715 ◽

1970 ◽

Vol 09 (03) ◽

pp. 259-267

Author(s):

Akira Hasegawa ◽

Goro Urakubo ◽

Akira Tanaka

Keyword(s):

Isotopic Exchange ◽

Practical Method ◽

Renal Tissue ◽

Whole Body ◽

High Yield ◽

Rapid Synthesis ◽

Isotopic Exchange Reaction ◽

Preferential Binding ◽

Short Time

SummaryThe rapid synthesis of 203Hg-chlormerodrin by an isotopic exchange reaction in organic solvents was investigated using a mixture of inactive chlormerodrin and 203Hg-mercuric chloride. This reaction is promising as a practical method since 203Hg-CM can be so prepared in a short time. In methanol, 3-acetoxy-mercuri-2 methoxypropylurea exchanged at room temperature with 203Hg-mercuric acetate to a relatively high yield. The most suitable solvent for paper chromatography of CM was found to be a mixture of dimethylformamide, water and methanol (5 : 1 : 14 v/v). The fate and distribution of 203Hg-CM in rats were studied after a single oral dose and the maximum of activity was observed in the kidneys during the first 6 hours. A preferential binding of Hg by renal tissue was found. The biological half-life in the whole body was about 18.5 days. This compound was excreted mainly via the faeces but small amounts were excreted in the urine.

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Post-drying of energy sorrel in a grate stock

Research in Agricultural Engineering ◽

10.17221/4921-rae ◽

2012 ◽

Vol 50 (No. 1) ◽

pp. 15-22

Author(s):

P. Hutla ◽

J. Mazancová

Keyword(s):

Water Content ◽

Electric Energy ◽

Energy Crop ◽

Yield Potential ◽

High Yield ◽

Large Capacity ◽

The Czech Republic ◽

Time Switching ◽

Operational Conditions ◽

Short Time

Energy sorrel is a crop with high-yield potential and belongs among the most promissing energy crop for the Czech Republic. The suitable processing technology is harvest by the harvesting cutter with subsequent short-time storage and post-drying of chopped material in the large-capacity hayloft. For chopped sorrel were found-out hydraulic air losses during its passing through the stored layer and they were compared with values for stored forage. Two methods of drying ventilators controlling in the large-capacity heyloft were compared with the regime of time switching within chopped sorrel drying. Electric energy comsumption for ventilators drive in different regimes depends on water content in the material. Method of ventilators or time switching controlling has no effect on drying process result, thus even on water content reduction in the dried material. Under operational conditions the possibility of the chopped energy sorrel in large-capacity heyloft was verified.

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Valorisation of Chinese hickory shell as novel sources for the efficient production of xylooligosaccharides

10.21203/rs.3.rs-868910/v1 ◽

2021 ◽

Author(s):

Zhi-Kun Wang ◽

Caoxing Huang ◽

Jun-Lei Zhong ◽

Lv Tang ◽

Bing Li ◽

...

Keyword(s):

Food Waste ◽

Liquid Fraction ◽

Hydrothermal Process ◽

Maximum Yield ◽

High Yield ◽

Efficient Production ◽

Pretreatment Condition ◽

Sustainable Technologies ◽

Chemical Structures ◽

Short Time

Abstract Chinese hickory shell, a by-product of the food industry, is still not utilized and urgent to develop sustainable technologies for its valorization. This research focuses on the systematical evaluation of degraded products and xylooligosaccharide production with high yield from the shell via hydrothermal process. The results indicated that the pretreatment condition strongly affected the chemical structures and compositions of the liquid fraction. The maximum yield of XOS (55.3 wt%) with limitation of by-products formation was achieved at 160 oC for 2 h. High temperature (220 oC) and short time (0.5 h) contributed to hydrolysis of xylooligosaccharide with high DP to yield 37.5 wt% xylooligosaccharide with DP from 2 to 6. xylooligosaccharide obtained mainly consisted of xylan with branches according to the HSQC NMR analysis. Overall, the production of XOS with a high yield from food waste will facilitate the valorization of food waste in the biorefinery industry.

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Valorization of Chinese hickory shell as novel sources for the efficient production of xylooligosaccharides

Biotechnology for Biofuels ◽

10.1186/s13068-021-02076-9 ◽

2021 ◽

Vol 14 (1) ◽

Author(s):

Zhi-Kun Wang ◽

Caoxing Huang ◽

Jun-Lei Zhong ◽

Yi Wang ◽

Lv Tang ◽

...

Keyword(s):

Food Waste ◽

Liquid Fraction ◽

Hydrothermal Process ◽

Maximum Yield ◽

High Yield ◽

Efficient Production ◽

Pretreatment Condition ◽

Sustainable Technologies ◽

Chemical Structures ◽

Short Time

Abstract Chinese hickory shell, a by-product of the food industry, is still not utilized and urgent to develop sustainable technologies for its valorization. This research focuses on the systematical evaluation of degraded products and xylooligosaccharide production with high yield from the shell via hydrothermal process. The pretreatment was carried out in a bath pressurized reactor at 140–220 °C for 0.5–2 h. The results indicated that the pretreatment condition strongly affected the chemical structures and compositions of the liquid fraction. The maximum yield of XOS (55.3 wt%) with limitation of by-products formation was achieved at 160 °C for 2 h. High temperature (220 °C) and short time (0.5 h) contributed to hydrolysis of xylooligosaccharide with high DP to yield 37.5 wt% xylooligosaccharide with DP from 2 to 6. Xylooligosaccharide obtained mainly consisted of xylan with branches according to the HSQC NMR analysis. Overall, the production of XOS with a high yield from food waste will facilitate the valorization of food waste in the biorefinery industry. Graphical Abstract

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Thiazolidine Deprotection by 2-Aminobenzamide-Based Aldehyde Scavenger for One-Pot Multiple Peptide Ligation

10.26434/chemrxiv.14721477 ◽

2021 ◽

Author(s):

Koki Nakatsu ◽

Hitoshi Murakami ◽

Gosuke Hayashi ◽

Akimitsu Okamoto

Keyword(s):

Native Chemical Ligation ◽

High Yield ◽

Side Reactions ◽

Model Peptide ◽

One Pot ◽

Chemical Ligation ◽

Good Ability ◽

Synthetic Proteins ◽

Short Time ◽

Peptide Ligation

Strategies for one-pot peptide ligation enable chemists to access synthetic proteins at a high yield in a short time. Herein, we report a new one-pot multi-segments ligation strategy using N-terminal thiazolidine (Thz) peptide and a formaldehyde scavenger. Among our designed 2-aminobenzamide-based aldehyde scavengers, 2-amino-5-methoxy-N’,N’-dimethylbenzohydrazide showed a good ability to capture formaldehyde from Thz at pH 4.0. This scavenger had compatibility with the conditions of native chemical ligation at pH 7.5. Using this scavenger for a model peptide ligation system, we performed one-pot four-segment ligation at a high yield without significant side reactions.

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3,2,1 and stop! An innovative, straightforward and clean route for the flash synthesis of metallacarboranes

Green Chemistry ◽

10.1039/c8gc03943g ◽

2019 ◽

Vol 21 (8) ◽

pp. 1925-1928 ◽

Cited By ~ 3

Author(s):

Ines Bennour ◽

Ana M. Cioran ◽

Francesc Teixidor ◽

Clara Viñas

Keyword(s):

High Temperature ◽

High Yield ◽

Short Time

Analogs to metallocene can be synthesised in high yield by heating solids [HNMe3][C2B9H12]/CoCl2·xH2O to high temperature for very short time.

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Uniaxial Properties versus Temperature, Creep and Impact Energy of an Austenitic Steel

High Temperature Materials and Processes ◽

10.1515/htmp-2015-0174 ◽

2017 ◽

Vol 36 (2) ◽

pp. 135-143

Author(s):

Josip Brnic ◽

Goran Turkalj ◽

Sanjin Krscanski ◽

Goran Vukelic ◽

Marko Canadija

Keyword(s):

Tensile Strength ◽

Yield Strength ◽

Impact Energy ◽

Creep Resistance ◽

Testing Machine ◽

High Yield ◽

High Yield Strength ◽

Heat Resistant Steel ◽

Computer Controlled ◽

Short Time

AbstractIn this paper, uniaxial material properties, creep resistance and impact energy of the austenitic heat-resistant steel (1.4841) are experimentally determined and analysed. Engineering stress–strain diagrams and uniaxial short-time creep curves are examined with computer-controlled testing machine. Impact energy has been determined and fracture toughness assessed. Investigated data are shown in the form of curves related to ultimate tensile strength, yield strength, modulus of elasticity and creep resistance. All of these experimentally obtained results are analysed and may be used in the design process of the structure where considered material is intended to be applied. Based on these results, considered material may be classified as material of high tensile strength (688 MPa/293 K; 326 MPa/923 K) and high yield strength (498 MPa/293 K; 283 MPa/923 K) as well as satisfactory creep resistance (temperature/stress $ \to $strain (%) at 1,200 min: 823 K/167 MPa $ \to $0.25 %; 923 K/85 MPa $ \to $0.2 %).

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Solvent-Free Biginelli Reactions Catalyzed by Hierarchical Zeolite Utilizing Ball Mill Technique: Green Sustainable Process

10.20944/preprints201702.0015.v1 ◽

2017 ◽

Author(s):

Ameen Shahid ◽

Nesreen S. Ahmed ◽

Tamer S. Saleh ◽

Shaeel A. Al-Thabaiti ◽

Sulaiman N. Basahel ◽

...

Keyword(s):

Ethyl Acetate ◽

Ball Mill ◽

Zeolite Catalyst ◽

High Yield ◽

One Pot ◽

Hierarchical Zeolite ◽

Three Component Reaction ◽

High Yields ◽

Biginelli Reactions ◽

Short Time

A sustainable green one pot procedure for the synthesis of dihydropyrimidinones (DHPMs) derivatives by a three-component reaction of β-ketoester derivatives, aldehyde and urea or thiourea over the alkali-treated H-ZSM-5 zeolite under ball-milling has been developed. The product was isolated by simple washing of the crude reaction residue with ethyl acetate followed by evaporation of solvent. The hierachical zeolite catalyst (MFI27_6) showed high yield (86–96%) of dihydropyrimidinones (DHPMs), in very short time (10-30 min). The catalyst is recycled for subsequent reactions in four runs without appreciable loss of activity and high yields of products provide efficient protocol for Biginelli reactions.

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