American Journal of Chemical and Biochemical Engineering最新文献_第2页

Antibacterial Effects of Chemical Constituents Isolated from the Roots of Cordia myxa (Boraginaceae) on Salmonella typhi (Enterobacteriaceae) 菖蒲根化学成分对伤寒沙门氏菌的抑菌作用

American Journal of Chemical and Biochemical Engineering Pub Date : 2021-02-10 DOI: 10.11648/J.AJCBE.20210501.11

D. Bernard, M. Mathieu, M. Djaouda, Abdou Tchoukoua, Wakayansam Bouba Romeo, M. Alain, L. Benoît

{"title":"Antibacterial Effects of Chemical Constituents Isolated from the Roots of Cordia myxa (Boraginaceae) on Salmonella typhi (Enterobacteriaceae)","authors":"D. Bernard, M. Mathieu, M. Djaouda, Abdou Tchoukoua, Wakayansam Bouba Romeo, M. Alain, L. Benoît","doi":"10.11648/J.AJCBE.20210501.11","DOIUrl":"https://doi.org/10.11648/J.AJCBE.20210501.11","url":null,"abstract":"Cordia myxa is a Cameroonian pharmacopoeia traditional plant. It belongs to the Boraginaceae family, which different parts are used in the treatment of various bacterial infections. The phytochemical screening carried out on the Cordia myxa species indicates the presence of alkaloids, triterpenes, steroids, carbohydrates, flavonoids and saponins. Our investigations on the roots of this plant allowed us to isolate two triterpenes from the ethyl acetate extract, which crystallize in the Hex/AcEt [2/8] solvent system; (23R) campesta-9 (11), 24 (30) diene-18,23-diol 3-O-α-rhamnopyranoside (compound 1) and alphitolic acid (compound 2). The isolation and characterization of these compounds were carried out respectively by silica gel chromatography and by NMR (1D, 2D) spectral analysis. Compound 1and 2 were tested on the in vitro growth of E.coli and Salmonella typhi using the Muller-Hinton solid medium disc method. The results revealed that these compounds have a dose-dependent antibacterial activity on Salmonella typhi. However, compound 2 had a better antibacterial potential on the Salmonella strain (18.6±0.6mm, 30mg/ml) with the MIC=0.25mg/ml than the compound 1 (14.5±0.4mm, 30mg/ml,) with the MIC=0.44mg/ml. Few classes of antibiotics have been tested, to look for those with the best results and compare the different doses of our compounds. The two compounds did not have any effect on E. coli.","PeriodicalId":337881,"journal":{"name":"American Journal of Chemical and Biochemical Engineering","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121702109","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Extraction, Characterization and Dextrinization of Starch from Six (6) Varieties of Tubers from Iwo Osun State Nigeria for Application in the Production of Adhesives 从尼日利亚Iwo Osun州6种块茎中提取、表征和糊化淀粉用于粘合剂生产的研究

American Journal of Chemical and Biochemical Engineering Pub Date : 2019-12-05 DOI: 10.11648/J.AJCBE.20190302.11

Oluwatobi D. Adekunle, Omiye Mobolaji Kayode, Oluwatoyin Kemi Awoyale, M. Dawodu

{"title":"Extraction, Characterization and Dextrinization of Starch from Six (6) Varieties of Tubers from Iwo Osun State Nigeria for Application in the Production of Adhesives","authors":"Oluwatobi D. Adekunle, Omiye Mobolaji Kayode, Oluwatoyin Kemi Awoyale, M. Dawodu","doi":"10.11648/J.AJCBE.20190302.11","DOIUrl":"https://doi.org/10.11648/J.AJCBE.20190302.11","url":null,"abstract":"Tuber crops are widely consumed; they come in various varieties with great nutritional and non- nutritional values. They are very rich in starch. The starch content of each of the six varieties of Nigerian tubers was determined, each of the tubers was wet fractionated in the laboratory and the starch was recovered. The composition of the tubers (dry matter, protein, ash and mineral content) and starch isolation (moisture, starch, protein, phosphorus, fat and carbohydrate) were determined. Substantial differences in the starch content of the tubers were observed. The dry starch recovery ranged from 10.20% to 18.30% and the wet starch recovery ranged from 15.70-32.40%. Moisture content ranged from 13-15.80%, viscosity 275.08 -382.33. The carbohydrate, ash, fat and protein content of the six varieties of the tubers vary from 45% to 53.8%, 1.0 to 2.0%, 19.56 to 21.99% and 10.96-14.29% respectively. All six starches were insoluble in water and ethanol and proved positive to iodine and Fehling’s test. Extracted starch was dextrinated using 0.1M and 0.2M HCl separately at 160 and 100°C to obtain yellow dextrin and white dextrin respectively which were soluble in water. Modified starches were formulated into adhesives. Results obtained indicated satisfactory strength for the adhesives. Thus starches suitable for the production of adhesives were obtained.","PeriodicalId":337881,"journal":{"name":"American Journal of Chemical and Biochemical Engineering","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134038370","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Assessment of Low Temperature Refining Process of Castor Seed Oil for Biodiesel Production 用于生物柴油生产的蓖麻籽油低温精炼工艺的评价

American Journal of Chemical and Biochemical Engineering Pub Date : 2019-01-29 DOI: 10.11648/J.AJCBE.20190301.11

C. Muhammad, M.N.A. Mukhtar, Muhammad Sabiu Jibrin, M. Dabai, A. Baki

{"title":"Assessment of Low Temperature Refining Process of Castor Seed Oil for Biodiesel Production","authors":"C. Muhammad, M.N.A. Mukhtar, Muhammad Sabiu Jibrin, M. Dabai, A. Baki","doi":"10.11648/J.AJCBE.20190301.11","DOIUrl":"https://doi.org/10.11648/J.AJCBE.20190301.11","url":null,"abstract":"In recent years research on biodiesel production from non-edible seed oil is receiving more attention to prevent food vs biofuels problems such as starvation in developing countries. Castor seed oil is potential non-edible biodiesel feedstock, but it has high viscosity and high acid value which are among the undesired factors in biodiesel production. The castor seed oil was extracted using soxhlet extraction method, refined using standard analytical methods and its physicochemical properties was determined using ASTM methods. The crude extracts of castor seeds oil which was characterized as high viscous oil, was refined to improve its quality, and physicochemical properties of refined and crude extracts castor seed oil was studies. The crude extracts oil (41.29±1.54%) produce was refined to reduce its high viscosity (233.0±2.00 mm 2 /s) and acid value (4.488±0.40 mgKOH/g). The viscosity and acid value of the oil significant reduced to 159.0±3.00 mm 2 /s and 2.805±0.20 mgKOH/g after the refining process. The others physicochemical properties such as flash point, saponification value, iodine value, moisture contents, specific gravity, refractive index, kinematic viscosity, cloud point, pour point and free fatty acids qualities were improved after refining. The study show that refined castor seed oil were more suitable in biodiesel production than crude castor seed oil.","PeriodicalId":337881,"journal":{"name":"American Journal of Chemical and Biochemical Engineering","volume":"272 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115902140","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Control of Aflatoxins in Poultry Feed by Using Yeast 酵母控制家禽饲料中的黄曲霉毒素

American Journal of Chemical and Biochemical Engineering Pub Date : 1900-01-01 DOI: 10.11648/j.ajcbe.20220601.13

N. Afzal, Syeda Mona Hassan, Shahzad Sharif Mughal, Alejandro Pando, Alvina Rafiq

引用次数: 4

Cotton Bed Promotes Faster Growth and Higher Biomass Production of Mat-Forming Cyanobacterium Oscillatoria sp. 棉花床促进成席振荡蓝藻加快生长和提高生物量。

American Journal of Chemical and Biochemical Engineering Pub Date : 1900-01-01 DOI: 10.11648/j.ajcbe.20220601.15

Vijetna Singh, Bhumi Nath Tripathi

引用次数: 0

Influence of Blended NPSB Fertilizer Rates and Cattle Manure on Growth, Yield and Yield Components of Black Cumin (Nigella Sativum L.) in Guder, Ethiopia NPSB配施与牛粪对埃塞俄比亚古德地区黑孜然生长、产量及产量成分的影响

American Journal of Chemical and Biochemical Engineering Pub Date : 1900-01-01 DOI: 10.11648/j.ajcbe.20220601.12

Samuel Rabuma, M. Azene, Gudeta Nepir

引用次数: 2

Efficacy of Herbicides to Various Weeds in Perennial Crops 除草剂对多年生作物中各种杂草的防治效果

American Journal of Chemical and Biochemical Engineering Pub Date : 1900-01-01 DOI: 10.11648/j.ajcbe.20220601.11

B. Ayana

引用次数: 0

Electrochemical Behavior of Chloroquin, Azithromycin and Hydroxychloroquin onto Carbon-Clay Paste Electrode Doped with Titanium Oxide (TiO₂) 氯喹、阿奇霉素和羟基氯喹在掺杂二氧化钛(TiO2)碳-粘土糊电极上的电化学行为

American Journal of Chemical and Biochemical Engineering Pub Date : 1900-01-01 DOI: 10.11648/j.ajcbe.20220601.14

Bakary Tigana Djonse Justin, Hambate Gomdje Valéry, Zang Akono Adam Ramses, Niraka Blaise, Djomou Paul Nestor, A. Chtaini

引用次数: 1