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Schiff bases can be synthesized by reacting Vanillin and p-aminoacetophenone using a natural acid catalyst such as lime juice (Citrus aurantifolia.) with the grinding method. The purposes of this study were to determine the characterization. The yield of synthesized compounds calculated and also determined...

In the previous research, it has been found that cyclohexanone pentaerythritol ketal has some bioactivity in the treatment of hurt in sports. In this work, cyclohexanone pentaerythritol ketal was synthesized from cyclohexanone and pentaerythritol by condensation catalyzed by zeolite and modified zeolite,...

A Schiff base is a compound with functional group that contains a carbon-nitrogen double bond with the nitrogen atom conected to an aryl or alkyl group. It is usually formed by condensation of an aldehyde or keton with a primary amine. The 2-methoxy-4-((4-methoxyphenilimino) methyl) phenol compound could...

Well-defined PEGylated zwitterionic triblock copolymer, poly(ethylene glycol)-b-poly¬¬¬¬(methacrylic acid)-b-poly(2-aminoethyl methacrylate) (PEG-b-PMAA-b -PAEMA), was prepar¬e¬d from poly(ethylene glycol)-b-poly(tert-butyl meth acrylate) -b-poly(N-(tert-butoxycarbonyl)¬¬¬¬ amino ethyl methacrylate)(PEG-b-PtBocMA-b-PtBoc...

A novel solvent-free photosensitive polyester based on the hyperbranched aliphatic polyesters has been studied. The hyperbranched aliphatic polyesters (Polymer A), which was prepared from 2,2-dihydroxymethyl butyric acid(DMBA) containing one carboxylic group and two hydroxylic groups, Trimethylolpropane(TMP)...

Buyat Bay is a small bay located Minahasa, North Sulawesi, Indonesia. The bay was famous due to the mining activities of Newmont Minahasa Raya Ltd (NMR) since 1996, where NMR utilizes this bay as the flow of the disposal of tailings (mining waste) for its gold mining activity. The aim of this study is...

The fishery sector is one of the main commodities in South Sumatra because fish consumption in South Sumatra is relatively high due to the many processed snacks made with fish. Based on BPS data, fish commodity is one of the contributors to 0.27% of increasing inflation in South Sumatra. This is an opportunity...

Voacanga foetida (Bl) Rolfe (Apocynaceae) locally called Tampa Badak is a widely distributed plant in Indonesia. Indonesian people use this plant as a traditional medicine to treat infections, pain, diarrhea, itching, and swelling. VF-1 is an alkaloid compound that has been previously isolated from the...

Tert-butyl 4-formyl-3, 6-dihydropyridine-1(2H)-carboxylate(9) is an important intermediate for small molecule anticancer drugs. A rapid and high yield synthetic method for tert-butyl 4-formyl-3, 6-dihydropyridine-1(2H)-carboxylate was established in this work. The target compound was synthesized from...

Controlled degradation of poly-hydroxybutyrate (PHB) can be obtained by alcoholysis with two types of alcohol in the presence of p-toluenesulfonic acid as catalyst. PHB oligomers terminated with free hydroxyl groups were prepared in this way and characterized using NMR, DSC and TG analyses. The degradation...

Five new acidic ionic liquids were firstly synthesized from 8-hydroxyquinoline and five kinds of acid such as H2PO4, H2SO4, CH3SO3H, TSOH, HBF4 by one-pot method. The structures of the synthesized compounds were characterized by 1H NMR, IR and MS. Acidities of the ILs was determined by Hammett acidity...

Nitrogen-containing heterocyclic compounds become main trend of chemical materials gradually due to its structure diversification, high selectivity, low toxicity and other environmental- friendly characteristics. Meanwhile, it is very important in pharmaceutical research and development. Wherein, people...

4-(pyrrolidin-1-ylmethyl)benzaldehyde (1) as a water-soluble aldehyde is an important intermediate for small molecule anticancer drugs. A rapid and high yield synthetic method for 4-(pyrrolidin-1-ylmethyl)benzaldehyde (1) was established in this work. The target compound was synthesized from the commercially...

A new terbium ( ) complex of the Schiff base (HL) derived from1-phenyl-3-furyl-4-benzoyl-4, 5-dihydropyrazol-5- one (PFBP) and 2-aminobenzimidazole (2-AB) has been synthesized and investigated by photolum-inescence spectroscopy. The molecular structure was characterized by IR spectra, UV spectra and...

The fiberglass reinforced plastic (FRP) pipelines have been used widely in oil-gas gathering and transportation. The defects of FRP pipelines would increase with the extension of service time. However, it is very difficult to detect the defects of FRP pipelines on-spot quickly. In this paper, a new method...

4-(4-aminophenoxy)-N-propylpicoliamide 4 is an important intermediate for the synthesis of many biologically active compounds. The compound 4-(4-aminophenoxy)-N-propylpicolinamide was obtained by three simple steps to synthesis from picolinic acid. In this paper, three novel 3-phenyl-1H-pyrazole derivatives...

Tinospora crispa is a plant of the Menispermaceae family which is one of the endemic plants in Indonesia, commonly called as Brotowali. Tinospora crispa have been used traditionally to treat fever, diabetes, rheumatism and sinusitis. The chemical components of the plant have not been reported so far....

From the Turpinia arguta Seem, twelve compounds were isolated and identified as corosolic acidacid-28-O- -D-glucopyranosyl ester(1), pomolic acid(2), ursolic acid(3), quercetin (4), rhoifolin (5), apigenin-7-O-rutinoside(6), quercetin-3- O-a-L-ara- binopyranoside(7), p-hydroxy cinnamic acid(8), caffeic...

A series of N-alkylated chitosan (NACS) with various alkyl chain length and degree of substitution (DS) was prepared by a reductive amination method. The synthesis and structural characteristics of NACS was determined by FTIR, NMR and elemental analysis (EA). Fluorescence spectroscopy was used to analyze...

Coal bed methane(CBM) exists in the pore of coal, and the fracture of the coal seam also provides the seepage path for mining. The correct evaluation of the pore is the key to the exploration and development of coalbed methane, which is also a difficult point. In this paper, we use NMR experiments to...

Polysaccharide has many biological functions, such as anti-tumor, anti-virus and so on. The function of polysaccharide is closely related to its structure. The structure of polysaccharides can be classified into primary structure and advanced structure. There are many methods for the analysis of polysaccharide...

Objectives: This study investigated individual, community and district level factors associated with neonatal mortality among a national sample of Nepalese women. Methods: Data were drawn from the 2006 Nepalese Demographic and Health Survey on women aged 15–49 who delivered within three years prior...

Miriplatin, a novel lipophilic platinum complex has been developed to treat hepatocellular carcinoma. An improvd synthetic route was designed and used to prepare the target compound. Pt(C6H14N2)I2 was reacted with CH3(CH2)12COOAg in water subsequently product was separated from AgI by dissolved in ethanol....

Reinfection with different DENV serotypes might develop cross immunity that aggravates the illness via antibody-dependent enhancement. Identifying the DENV epitopes can help in the development of a tetravalent vaccine. However, the available prediction technologies (i.e., X-crystallography and NMR) are...

From Cinnamomum camphora, ten compounds were isolated and identified as 4-hydroxysesamin (1), 3,3 -dihydroxy-4,4 -dimethoxytetrahydrofuran lignanoid (2), 3, 4- methylenedioxyphenyl-3 ,9-dihydroxy-4 -methoxy- tetrahydrofuran lignanoid (3), lyoniresinol (4) , (+)-3 -(3, 4 – methylenedioxyphenyl)- 1,2-...

Under the influence of water and external loads, the microstructure of loess changes, leading to a loss of strength and ultimately frequent engineering accidents. The fractal characteristics and influencing factors of the microscopic pore structure of unsaturated loess were investigated using nuclear...

Poly (lactic acid) has become a hot topic in biomedical field due to good biocompatibility and biodegradability. As an important method for synthesis of poly lactic acid materials, ring-opening polymerization of lactide catalyzed by metal complexes can achieve the controllable polymerization of lactide...

Optically active fluorescent sensor containing a 1,1 -binaphthyl core and N,N'-diamine was synthesized and characterized by NMR spectroscopy. S-N1,N1'-(2,2'-dimethoxy-[1,1'-binaphthalene]-6,6'-diyl)bis (ethane-1,2-diamine) was synthesized by coupling reaction with Pd(dppf)Cl2 and Cu(phen)Cl2.

The purpose of this research was to investigate the effect of IBL strategy on chemistry undergraduate students' conceptual understanding and science process skill achievement in NMR Spectroscopy. This research involved two classes of Determination of Organic Structure course. One of them was chosen randomly...

One new monoterpenoid compound 4'-acetyl-eucommiol (1) and two known compounds eucommiol(2), 1-deoxyeucommiol(3) were isolated from the leaves of Eucommia ulmoides. The structures of the new monoterpenoid eucommiol were elucidated by means of chemical evidence and 1D-and 2D-NMR (1H, 13C, HSQC, HMBC,...

A new kind of photosensitive polyester based on the hyperbranched aliphatic polyesters has been investigated. The hyperbranched aliphatic polyesters (polymer A) with 0.69 of the degrees of branching (DB) was prepared from 2,2-dihydroxymethyl butyric acid. Followed by end-modified with maleic anhydride...

In order to study whether different concrete aggregate sizes have certain effects on the mechanical properties of concrete, three specimens with different concrete aggregate sizes were scanned by low field nuclear magnetic resonance testing method after fatigue test loading in this paper. By testing...

objectives: Nutmeg is a native Indonesian plant which is widely exported in the form of nutmeg and nutmeg essential oil. Exploration of nutmeg essential oils content and its activities continues to be carried out. Nutmeg essential oil contained 8-11% of myristicin, and this compound has alkenylbenzenes...

Before outbreaks of avian influenza (AI) among commercial laying duck in Central Java in 2012, duck were considered as reservoir of this virus, the outbreaks reveals that duck were also susceptible for AI infection. The outbreaks among laying ducks in 2012 were caused by AIV subtype H5N1 clade 2.3.2,,...

3-Praziquantel-4-(4-chlorophenylsulfonyl)-1,2,5-oxadiazol-2-oxide was synthesized via the coupling reaction of praziquante and 1,2,5-oxadiazole in ethylene glycol, and its molecular structure was confirmed by the melting point and spectroscopic data (UV, IR, and 1H NMR). Moreover, it may be a potential...

Cervical cancer attitudes a significant health challenge due to its high prevalence and mortality rates. As an alternative approach to treating cancer, scientists are exploring the use of bioactive compounds derived from herbal plants. One such plant is the bottle brush plant (C. citrinus). Isolation...

Polyacrylonitrile copolymers containing amine groups (Poly(AN-VA-DEMA) copolymers) were synthesized by the aqueous precipitation copolymerization of acrylonitrile (AN), vinyl acetate (VA) and methacrylic acid 2-dimethylaminoethyl ester (DEMA) with a Na2S2O5-NaClO3 redox initiating system. The influences...

One new monoterpenoid, 5-aldehyde-6'-O-sinapoyljasminoside A (1), together with two known compounds 6'-O-sinapoyljasminoside B(2) and 6'-O-trans-sinapoyljasminoside L(3), were isolated from the fruits of Gardenia jasminoides Ellis. The structures of the new monoterpenoid compound were elucidated by means...

The nuclear magnetic resonance (NMR) method is introduced in order to make the test of crosslink density of composite solid propellant easier than traditional methods. The research status of mechanical properties of nuclear magnetic resonance and solid propellant is briefly introduced, so is the basic...

The 3-(10-bromodecyl)-5-isopropyl-2-methyl-1,4-benzoquinone (1) have been synthesized and structurally characterized by mass spectrometer (LC-MS), FT-IR, 1H-NMR and 13C-NMR spectra. The synthesis was carried out by refluxed Thymoquinone (TQ) with bromoundecanoic acid in the presence of acetonitrile:water...

The poor outlook for triple-negative breast cancer (TNBC) is due in part to the absence of effective targeted treatments and the variability in clinical response to standard chemotherapy. Previously, we saw positive outcomes in reducing cancer cell survival on TINCR-knocked out cells and in this study...

One method for synthesis of prenyl alcohol starting from isoprene was developed. Isoprene was chlorinated by concentrated hydrochloric acid, then esterification and saponification were occurring until prenyl alcohol was prepared. Some key influencing factors including reaction temperature,reaction time...

The paper presents data on the yield, chemical composition of bitumen extracted from the brown coal of the Tyulgan deposit. Bitumens were extracted from brown coal by the following methods: I) sequential extraction with ethanol, n-heptane, alcohol-benzene according to the Grefe method, II) low-temperature...

Implementing the strong commitment to the United Nations’ sustainable development goals, on May 10, 2017, the Prime Minister of Vietnam issued Decision No. 622/QD-TTg promulgating the “National Action Plan to Implement the 2030 Agenda for Sustainable Development.” Accordingly, ensuring the quality of...

The different understanding of the research course is analyzed in this paper. Based on the essence of its concept, we delve further into the idea of the research course teaching model and the development of target for emotion, knowledge, and ability. Meanwhile, the theory of research course teaching...

The purpose of this study is to isolate, purify and characterize active compounds from E. heterophylla L. plants and to know the antidiabetic activity of pure Katemas (E.heterophylla, L.) leaf compounds in vitro and in silico (molecular docking) through inhibition of alpha glucosidase enzymes. In this...

Russia, China and, Mongolia are among the countries having large reserves of coals which are traditionally utilized mainly as a fuel for energy generation. In the present paper, the solvolysis of a large series of different-ranked coals from various deposits of Russia and Mongolia in anthracene oil as...

3-Butyryloxy-16-(β-naphthylmethylene)-5α-androstane-17-one, a novel androstanone derivative, was synthesized by aldol condensation between epiandrosterone and β-naphthaldehyde and subsequent esterification reaction. The structure of the new product was characterized by 1H NMR, 13C NMR, IR, UV and mass...

The rise in temperature induces alterations in the unfrozen water content(ωu) at the soil-rock mixture and concrete interface, leading to a subsequent deterioration in interfacial strength. In this study, rough concrete surfaces were fabricated via 3D printing technology, and composite specimens comprising...