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756 articles for “Chemical”
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Research ArticleOpen accessEvery word in the titleEffects of Bradyrhizobium japonicum on Some Chemical Properties of Ferralsols under Soybean (Glycine max (L.) Merr.) CultivationBen Tshibuyi Kasu-Bandi, Laurent Kidinda Kidinda, Germain Nyembo Kasendue et al.This study was conducted on acidic soils in two different agro-ecological zones in order to evaluate the influence of Bradyrhizobium japonicum on soil chemical properties in the Upper-Katanga (DR Congo). A split plot design with three replicates was installed in two sites. The main plots included three strains of Bradyrhizobium japonicum plus the untreated control and four soybean varieties in … …American Journal of Agricultural and Biological Sciences, Vol. 14, Issue 1 · 17 Oct 2019 · 7,621 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleKnowledge of Chemical Hazards and Prevalence of Darkroom Diseases among Darkroom Technicians and Assistants in Southeast, NigeriaMark C. Okeji, Felicitas U. Idigo, AngelMary C. Anakwue, Uloma NwoguDarkroom technicians and assistants are exposed daily to x-ray processing chemicals. These chemicals contain known irritants which can cause some disease symptoms to its handlers. The aim of this study was to assess the knowledge of chemical hazards and prevalence of darkroom diseases among darkroom technicians and assistants in Southeast, Nigeria. The study adopted cross-sectional survey. A total of 105 … …Current Research in Medicine, Vol. 6, Issue 2 · 24 Nov 2015 · 8,128 accessesView PDFCite
Research ArticleOpen accessEvery word in the titlePhysical, Chemical, Microbiological and Parasitological Parameters in a Composting System of Vegetable Solid ResiduesFrancisco Rafael Martins Soto, Maira Oliveira Silva, Ramieri Moraes et al.This work aimed to evaluate the physical, chemical, microbiological and parasitological parameters in a composting system of Vegetable Solid Residues (VSR). The work was carried out during four months and was constituted of a compost bed of 12 m3 of volume and the proportion used for its filing was of 6:1 (VSR: Sawdust). For the analysis of the microbiological and … …American Journal of Environmental Sciences, Vol. 11, Issue 6 · 21 Nov 2015 · 7,288 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleThe Impact of Working Capital Turnover on Jordanian Chemical Industries’ ProfitabilityLina WarradThe chemical industry is of long-term importance to the maintain development of local economies and consider the largest industrial sectors in Jordan in terms of the exports volume which accomplished JD 1049000S in 2012. Working capital considers being a measure of company’s efficiency and its short-term financial health; moreover, it is a critical component for a business survival and a … …American Journal of Economics and Business Administration, Vol. 5, Issue 3 · 25 Feb 2014 · 7,628 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleAnticancer Activity of Isolated Chemical Constituents from Miliusa smithiaeChonthicha Naphong, Wilart Pompimon, Punchavee SombutsiriMiliusa plants belonging to the family Annonaceae are found in Thailand and have been used as Thai traditional medicines. There have been a few previously reports on the chemical constituents of plants in this genus, describing the presence of aporphine alkaloids, terpenoids, flavonoids, phenylpropanoids, styrylpyrones, bis-styryls and homogentisic acid derivatives. Miliusa smithiae, a new species for Thailand and world, has … …American Journal of Applied Sciences, Vol. 10, Issue 8 · 24 Jul 2013 · 7,263 accessesView PDFCite
Research ArticleOpen accessEvery word in the titlePhysico-Chemical Characteristics of Date Seed Oil Grown in SudanRehab Salih Mahmoud Abdalla, Alsheikh AlGilani Albasheer, Abdel Rahim Mohamed ELHussein, ELrasheed Ahmed GadkariemProblem statement: Studies were conducted on the physical-chemical properties of Sudanese date seed oil extracted from two date palm cultivars (Phoenix dactylifera L.) ALBarakawi and Alqundeila. The extracted oil from ALBarakawi seeds weighed 6.833% w/w oil, Alqundeila oil extracted weighed 5.064% w/w. Approach: The physical properties of ALBarakawi oil were: viscosity: 17cp, refractive Index: 1.444, density: 0.9116 g cm-3 color: … …American Journal of Applied Sciences, Vol. 9, Issue 7 · 5 May 2012 · 9,503 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleDifferences in Soil Physical and Chemical Properties of Rehabilitated and Secondary ForestsM. H. Akbar, O. H. Ahmed, A. S. Jamaluddin et al.Problem statement: The soil properties of tropical rain forest in Southeast Asia have been characterized by several researchers; however empirical data on soil characteristics under rehabilitation program are still limited or even lacking. This research is important to determine the soil physical and chemical properties of a rehabilitated degraded forest land 19 years after planting with various indigenous species in … …American Journal of Applied Sciences, Vol. 7, Issue 9 · 30 Sep 2010 · 12,550 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleEffects of Extractants on the Yields and Selected Chemical Characteristics of Humic Acids Isolated from Tropical Saprists PeatLee Jia Huey, Osumanu Haruna Ahmed, Nik Muhamad Ab. MajidProblem statement: Humic acids are beneficial to soil aggregation, binding of heavy metal, plant growth and many more. However, the isolation of Humic Acids (HA) from its origin is not only time-consuming, but the isolation is also affected by factors such as temperature and the types of extractants and their concentrations. Different concentrations of extractant are said to alter the … …American Journal of Applied Sciences, Vol. 7, Issue 7 · 31 Jul 2010 · 7,507 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleComparison of Selected Chemical Properties of Peat Swamp Soil Before and After Timber HarvestingMuhamad Ismawi Salimin, Seca Gandaseca, Osumanu Haruna Ahmed, Nik Muhamad Ab. MajidProblem statement: Peat swamp is an important component of the world’s wetlands. Once they are disturbed the tendency for the soil degradation is very high. This study compared selected chemical properties of a peat swamp soil before and after timber harvesting. Approach: Peat soil samples were taken at 0-15 cm depth in 6 plots with 0.1 ha each plot at … …American Journal of Environmental Sciences, Vol. 6, Issue 2 · 30 Apr 2010 · 8,792 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleTwo Optimization Methods to Determine the Rate Constants of a Complex Chemical Reaction Using FORTRAN and MATLABAbdel-Latif Aboul Seoud, Lamiaa A.M. AbdallahProblem statement: For chemical reactions, the determination of the rate constants is both very difficult and a time consuming process. The aim of this research was to develop computer programs for determining the rate constants for the general form of any complex reaction at a certain temperature. The development of such program can be very helpful in the control of … …American Journal of Applied Sciences, Vol. 7, Issue 4 · 30 Apr 2010 · 8,050 accessesView PDFCite