scholarly journals The effect of cocrystallization method and citric acid as coformer on water solubility of ethyl p-metoxycinnamate particle

2020 ◽  
Author(s):  
Revika Rachmaniar ◽  
Hesti Riasari ◽  
Lisarah Fauziah ◽  
Kenti ◽  
Rival Ferdiansyah
Keyword(s):  
Citric Acid ◽  
Water Solubility

scholarly journals Variasi Antioksidan dalam Pembuatan Protected Active Dried Yeast

2021 ◽  
Vol 19 (1) ◽  
pp. 1
Author(s):  
Ronny Purwadi ◽  
Vita Wonoputri ◽  
Febri Ulfa Fitriana ◽  
Najwa Shufia Choliq
Keyword(s):  
Ascorbic Acid ◽  
Citric Acid ◽  
Shelf Life ◽  
Death Rate ◽  
Water Solubility ◽  
Ascorbyl Palmitate ◽  
Inhibitory Effect ◽  
Co2 Production ◽  
Synthetic Antioxidants ◽  
Rate Test

Abstrak. Penggunaan antioksidan pada pembuatan protected active dried yeast (PADY) dapat memperpanjang umur simpan ragi kering. Antioksidan yang sering digunakan adalah antioksidan sintesis BHA dan BHT yang diduga bersifat karsinogenik. Penelitian ini bertujuan untuk mencari alternatif antioksidan yang lebih aman. Lima antioksidan yaitu asam sitrat, asam askorbat, tokoferol, natrium eritrobat, dan askorbil palmitat pada rentang konsentrasi 0,025-0,5% diuji pada suspensi ragiuntuk mempelajari efek inhibisi dari antioksidan tersebut. Uji laju produksi CO2 menunjukkan sifat noninhibisi dari asam askorbat, natrium eritorbat, asam sitrat, dan tokoferol, sedangkan sifat inhibisi askorbil palmitat dan BHT perlu diteliti lebih lanjut. Formulasi antioksidan terpilih untuk produksi PADY adalah asam sitrat 0,5%, asam askorbat 0,5%, dan tokoferol 0,5%. Pengeringan ragi dengan spray dryer menghasilkan PADY dengan kadar air sesuai standar. PADY dengan sifat fisik terbaik adalah variasi asam sitrat 0,5% dan asam askorbat 0,5% karena kelarutan dalam air yang baik serta granula yang lebih halus. Stabilitas vitalitas PADY diukur selama 45-50 hari, dan didapatkan PADY dengan antioksidan asam askorbat 0,5% memiliki konstanta laju kematian terendah, yaitu 0,0492/hari, setara dengan umur simpan 20 hari. Dengan demikian, formulasi antioksidan asam askorbat 0,5% berpotensi untuk dikembangkan pada produksi PADY. Kata kunci: antioksidan, ragi kering, stabilitas, vitalitas. Abstract. Variation of Antioxidant in Production of Protected Active Dried Yeast. The use of antioxidants in production of protected active dried yeast (PADY) can increase dried yeast’s shelf life. Usually, the antioxidants used are synthetic antioxidants such as BHA and BHT, which are known to be carcinogenic. Therefore, the aim of this research is to study antioxidant alternative that is safer. Five antioxidants, i.e. citric acid, ascorbic acid, tocopherol, sodium erythorbate, and ascorbyl palmitate in concentration range of 0.025-0.5% were tested on yeast suspension to study its inhibitory effect. CO2 production rate test showed noninhibitory characteristic of ascorbic acid, sodium erythorbate, citric acid, and tocopherol, whereas ascorbyl palmitate and BHT showed inhibitory characteristic. Formulations of antioxidants selected are 0.5% citric acid, 0.5% ascorbic acid, and 0.5% tocopherol. Spray drying of yeast resulted in PADY with moisture content within standard. PADYs with the best physical properties are 0.5% citric acid and 0.5% ascorbic acid variation due to good water solubility and finer granules. Vitality stability of PADY was measured for 45-50 days. PADY with 0.5% ascorbic acid had the lowest death rate constant, i.e. 0.0492/day, which is equivalent to 20-days shelf life. Thus, ascorbic acid antioxidant formulation of 0.5% can be developed in the production of PADY. Keywords: antioxidant, dried yeast, stability, vitality.

scholarly journals Investigation of the Influence of Temperature of Washed Water on the Main Indicators of Fertilizer Precipitate

2021 ◽  
pp. 73-81
Author(s):  
A. L. Giyasidinov ◽  
B. E. Sultonov ◽  
Sh. S. Namazov
Keyword(s):  
Citric Acid ◽  
Laboratory Experiments ◽  
Water Solubility ◽  
Raw Materials ◽  
Optimal Parameters ◽  
Optimal Temperature ◽  
Influence Of Temperature ◽  
Washing Water

The influence of the temperature of washing water on the main indicators of fertilizer precipitates obtained on the basis of mineralized mass (MM) and phosphorite flour (PF) has been studied. For laboratory experiments, MM with the following composition (weight, %) were used: 14.60-P2O5, 43.99-CaO;14.11-CO2, 1.58-SO3; CaO:P2O5=3.01 and PF, which has the following composition (weight,%):17.76-P2O5, 47.51-CaO; 5.27-i.r.; CaO:Р2О5=2,68. The optimal temperature of washing water can be considered 80-90oC of both phosphate raw materials (PRM). Under optimal parameters, the following formulations of fertilizer precipitates (weight.%) are obtained:P2O5total.=21.60-22.65;P2O5acceptable by citric acid=11.42-12.19; P2O5water solubility=2.08-2.20; CaOtotal.=40.89-41.40; CaOacceptable by citric acid.=22.12-23.07; CaO water solubility=4.03-4.26; Ntotal.=1.69-1.79 based on MM and P2O5total.=24.86-26.07; P2O5acceptable by citric acid=13.19-14.08; P2O5water solubility=2.40-2.57; CaOtotal=45.19-45.41; CaOacceptable by citric acid=24.54-25.37; CaOwater solubility=4.25-4.48; Ntotal.=1.78-1.90 based on PF. The degree of washing of fertilizer precipitates from Ca(NO3)2 is 97.82-98.01 and 97.75-97.98%, respectively for MM and PF.

scholarly journals Corn and Rice Starch-Based Bio-Plastics as Alternative Packaging Materials

Fibers ◽  
2019 ◽  
Vol 7 (4) ◽  
pp. 32 ◽  
Author(s):  
Marichelvam ◽  
Jawaid ◽  
Asim
Keyword(s):  
Citric Acid ◽  
Thermogravimetric Analysis ◽  
Water Absorption ◽  
Tensile Properties ◽  
Water Solubility ◽  
Thermoplastic Starch ◽  
Rice Starch ◽  
Packaging Materials ◽  
Commercial Applications ◽  
Thickness Testing

Due to the negative environmental impacts of synthetic plastics, the development of biodegradable plastics for both industrial and commercial applications is essential today. Researchers have developed various starch-based composites for different applications. The present work investigates the corn and rice starch-based bioplastics for packaging applications. Various samples of bioplastics are produced, with different compositions of corn and rice starch, glycerol, citric acid, and gelatin. The tensile properties were improved after adding rice starch. However, water absorption and water solubility were reduced. On the basis of these results, the best sample was analyzed for thickness testing, biodegradability properties, SEM, hydrophilicity, thermogravimetric analysis, and sealing properties of bioplastic. The results show the suitability of rice and corn-based thermoplastic starch for packaging applications.

scholarly journals 310 Using synergistic antibacterial combinations based on vegetable essential oils to replace feeding antibiotics

2019 ◽  
Vol 97 (Supplement_3) ◽  
pp. 10-10
Author(s):  
yanping Hu ◽  
Jie Huang ◽  
Zhongxin Zhou
Keyword(s):  
Fatty Acids ◽  
Citric Acid ◽  
Organic Acids ◽  
Essential Oils ◽  
Octanoic Acid ◽  
Water Solubility ◽  
Enterotoxigenic Escherichia Coli ◽  
Medium Chain ◽  
Medium Chain Fatty Acids ◽  
Chain Fatty Acids

Abstract Vegetable essential oils, medium-chain fatty acids and organic acids have great potential in the development of alternatives to feeding antibiotics, but many problems in practice limit their application, such as irritating odor, poor water solubility, easy oxidation and volatility. In this study, we found that vegetable essential oils (carcilol, cinnamaldehyde, terptol-4) and medium chain fatty acids (octanoic acid and nonanoic acid) or organic acids (citric acid) had significantly synergistic bactericidal effects on enterotoxigenic Escherichia coli and Salmonella enteribacilli, which are both common pathogens causing piglets diarrhea. Furthermore, we also compared the tolerances of the enterotoxigenic Escherichia coli against plant essential oils (cinnamaldehyde, carcocol, 4- terptol), medium chain fatty acids (octanoic acid and nonylic acid), organic acids (citric acid), and commonly used antibiotic growth promoter (gentamycin sulfate). They were in vitro cultured with ETEC strain for 30 consecutive generations and the minimum inhibitory concentration (MIC) value was detected. The results showed that the MIC values of carvonol, cinnamaldehyde, terpineol-4, octanoic acid, nonylic acid, and citric acid against the ETEC bacteria increased by 5, 3, 1, 0.3, 0.4 and 0 times. But the MIC value of gentamicin against ETEC bacteria increased, in the 20th generation, by more than 64 times. In conclusions, the synergistic bactericidal combination based on the plant essential oil and middle chain fatty acid or organic acid may be a better strategy to replace feeding antibiotics because their synergistic bactericidal combination can greatly reduce the effective concentration of plant essential oil, medium chain fatty acid and organic acid, thus alleviating to a certain extent the shortcomings of unstable effects caused by the irritating odor, the poor water solubility, easy oxidation and volatility. The synergistic bactericidal combination based on plant essential oils are also relatively difficult to cause bacterial tolerance and alleviate bacterial resistance to a certain extent.

scholarly journals Influence of cellulose fibers on physicochemical properties of biodegradable films based on polysaccharide derivatives

2020 ◽  
Vol 5 (1) ◽  
pp. 462-465
Author(s):  
Adrian K. Antosik ◽  
Katarzyna Wilpiszewska
Keyword(s):  
Mechanical Properties ◽  
Citric Acid ◽  
Physicochemical Properties ◽  
Young’S Modulus ◽  
Water Solubility ◽  
Filler Content ◽  
Young's Modulus ◽  
Cellulose Fibers ◽  
Biodegradable Films ◽  
Polysaccharide Derivatives

AbstractThe article presents a method of obtaining films based on carboxymethyl polysaccharide derivatives cross-linked with citric acid and reinforced with cellulose fibers (CFs). The addition of CFs to a film improves the mechanical properties of the composite. With the increase of filler content, the water solubility drops from 64 to 61%, respectively, for a system without a filler and that containing 7 wt% CFs, whereas Young’s modulus increases from 4.8 to 24.8 MPa for a film containing 5 wt% filler.

ANALISIS FISIKA KIMIA DARI KERANG DARA (Anadara granosa) YANG BERASAL DARI KAYUTANYO KAB. BANGGAI The Analysis of physical chemical from dara shells (Anadara granosa) origin from Kayutanyo, Kab.Banggai

2018 ◽  
Vol 2 (2) ◽  
Author(s):  
SULASMI ANGGO
Keyword(s):  
Protein Content ◽  
Water Content ◽  
Water Solubility ◽  
Gravimetric Method ◽  
Fat Content ◽  
Carbohydrate Content ◽  
Dust Content ◽  
Total Dust ◽  
Physical Chemical ◽  
Anadara Granosa

The Analysis of physical chemical from dara shells (Anadara granosa) origin from Kayutanyo, kab. Banggai, has been conducted.Dara shell meat is sleaned and dried and after that powered with blender. Determine % rendement, water bonding capacity and index water solubility with Anderson method, coarse fat content with gravimetric method and carbohydrate method with “bye difference” decrease method.The result of analysis showed rendement value is 24,35%, water bonding capacity is 1,6248 gram/ml, index water solubility is 0,202 gram/ml, water content is 79,0045%, total dust content is 1,072%, coarse protein content is 2,25%, coarse fat content is 8,47%, carbohydrate content is 9,2035%. Keyword : Dara shells, (Anadara granosa), analysis physical chemical

Coadministration of citric acid allows oxytetracycline dose reduction in yellowtail Seriola quinqueradiata infected with Vibrio anguillarum

2020 ◽  
Vol 140 ◽  
pp. 25-29
Author(s):  
K Akiyama ◽  
N Hirazawa ◽  
A Hatanaka
Keyword(s):  
Body Weight ◽  
Citric Acid ◽  
Effective Treatment ◽  
Dose Reduction ◽  
Vibrio Anguillarum ◽  
Enhancing Effect ◽  
Bacterial Diseases ◽  
Seriola Quinqueradiata ◽  
Poor Efficacy

Oxytetracycline (OTC) has been commonly used as an effective antibiotic against various fish bacterial diseases, including vibriosis. In this study, the absorption-enhancing effect of citric acid on oral OTC pharmacokinetics and treatment of artificial Vibrio anguillarum infection was evaluated in juvenile yellowtail Seriola quinqueradiata followed by serum OTC concentration analysis. When 25 mg kg-1 body weight (BW) OTC was administered in combination with 1250 mg kg-1 BW citric acid, the serum OTC concentration reached almost the same concentration as that of the group treated with 50 mg kg-1 BW OTC. This coadministration successfully suppressed mortality due to vibriosis similar to the group treated with 50 mg kg-1 BW OTC. Conversely, poor efficacy was observed when only 25 mg kg-1 BW OTC was administered. These results suggest that coadministration of citric acid can be beneficial in reducing the dose of OTC needed for effective treatment, and thus contributes to the goal of reduced use of this antibiotic in aquaculture.

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