Journal of Applied Chemical Science International最新文献

{"title":"SOMBOR INDICES OF (TUAC_{6}) AND (TUZC_{6}) NANOTUBES","authors":"B. K. Divyashree, R. Jagadeesh, .. Siddabasappa","doi":"10.56557/jacsi/2022/v13i47756","DOIUrl":"https://doi.org/10.56557/jacsi/2022/v13i47756","url":null,"abstract":"In a molecular structure, topological indices help us to capture the uniformity of the structure and also provide us the scientific provincialism to predict properties such as radius of gyrations, boiling points, viscosity etc. In this paper, we compute the sombor indices and the multiplicative sombor indices of (TUAC_{6}[n,m]) and (TUZC_{6}[n,m]) nanotubes. These degree-based topological indices formulas for the nanotubes build the connection which diffuses on the structure of the parameters and also in association, determine the properties of the nanotubes. We also plot the graphs to see the effects of our results on the considered parameters.","PeriodicalId":251966,"journal":{"name":"Journal of Applied Chemical Science International","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134497576","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}

{"title":"EFFECT OF SEASONAL VARIATION ON THE PHYSICO-CHEMICAL PROPERTIES OF SURFACE WATER AND SEDIMENTS OF SOMBRIERO RIVER IN RIVERS STATE, NIGERIA","authors":"Bartholomew Eze Alozie, L. Osuji, A. I. Hart","doi":"10.56557/jacsi/2022/v13i47710","DOIUrl":"https://doi.org/10.56557/jacsi/2022/v13i47710","url":null,"abstract":"Due to the vulnerability of the Sombriero River to contaminants, the effect of seasonal variation on the physico-chemical characteristics of the Sombriero River was investigated with respect to its sediment and surface water samples to ascertain the degree of alterations from the natural background level of the river and adherence to regulatory standards. Surface water and sediments were collected at seven selected sites along the Sombriero River. The dry season sampling was carried out in December, 2020, while the wet season sampling took place in May, 2021. The samples were analyzed in the laboratory following standard operational procedures. The results indicated high alterations (p< 0.05) in the concentrations of cadmium, nickel, zinc, iron, total dissolved solids, turbidity, biochemical oxygen demand, and chemical oxygen demand, beyond the background values of Nigeria’s Department of Petroleum Resources (DPR) and Federal Ministry of Environment (FMENV). The majority of the heavy metals, notably copper, cadmium, lead, manganese, nickel, zinc, and iron, had higher concentrations in water during the dry season, while sodium, potassium, and magnesium showed an increase in concentration in surface water during the wet season. However, the pH level was within the target background values of DPR and FMENV, and showed no significant variation in the dry and wet seasons. For instance, surface water had a pH range of 6.65 –7.18 in the wet season, and 6.93 –7.18 in the dry season. Sediments ranged from 6.06 – 6.59 and 6.10 – 6.88 during the wet season and dry season, respectively. The quality of water influences the health status of any populace, hence, analysis of water for physical, chemical, and biological properties is very important. \u0000 ","PeriodicalId":251966,"journal":{"name":"Journal of Applied Chemical Science International","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129896749","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}

{"title":"A SHORT REVIEW: THE EFFECT OF NANOMATERIALS FOR THERMAL DECOMPOSITION OF SOLID PROPELLANT OXIDIZER AP","authors":"P. Dave, S. Chaturvedi, Riddhi Thakkar, Ruksana Sirach","doi":"10.56557/jacsi/2022/v13i47625","DOIUrl":"https://doi.org/10.56557/jacsi/2022/v13i47625","url":null,"abstract":"This review attempts to discuss data related to the work of kinds of literature on various nanomaterials such as ferrites, oxides, and chromates of transition metals which lead to gain prominent attention in the field of thermal decomposition of solid propellant oxidizer mainly ammonium perchlorate (AP).  The effect of catalysts like metal oxides, inorganic and organic compounds, etc., is discussed for the thermal decomposition of  ammonium perchlorate (AP). This study underscores the experimental effectiveness of these catalysts in the decomposition process of solid propellants which enhances fast decomposition through decreasing their exothermic peak temperature. Such kind of improvements in propellant oxidizer and binder fuel help to increase the efficiency of rocket missiles. \u0000GRAPHICAL ABSTRACT \u0000 This short review includes the discussion on thermolysis of propellant oxidizers and their composite solid propellants from the few prime lists of literature. This aims to understand the behavior of nanomaterials as a catalyst for the thermal decomposition of propellant oxidizer ammonium perchlorate. Ammonium perchlorate has a polyhedron-like shape that undergoes decomposition upon heating from room temperature to ~420 ℃ with gaseous by-products. In the presence of catalyst, the decomposition occurred at a lower temperature than the pure ammonium perchlorate. Thus, it can be used in the formulation of propulsion systems that mainly improve their burn rate ultimately helpful in rocketry. \u0000","PeriodicalId":251966,"journal":{"name":"Journal of Applied Chemical Science International","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117179880","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}

{"title":"ANTIFUNGAL SCREENING OF GARLIC CLOVE EXTRACT AGAINST FUNGI CAUSING SPOILAGE IN OGBONO SEED (Irvingia gabonensis)","authors":"E. F., NWAKOBY, N. E., EZENWATA, I. S.","doi":"10.56557/jacsi/2022/v13i47626","DOIUrl":"https://doi.org/10.56557/jacsi/2022/v13i47626","url":null,"abstract":"Ogbono (Irvingia gabonensis) is a commercial and indigenous fruit tree of west and central Africa commonly known as African manago or wild manago .Garlic (Allium sativum) which is also used in this study  has been used for centuries as a food supplement and has been well documented for its  medicinal properties  in traditional and conventional medicine. This study was carried out in Awka metropolis Anambra State Nigeria. Isolation olate and identification of fungi associated with the deterioration of Ogbono seed  and the inhibition of those fungi isolated growth using garlic cloves extract as an antifungal. Spoilt Ogbono seeds (samples) were purchased from five selected Market Centers in Awka metropolis, and transported immediately to Alpha research laboratory Awka including garlic cloves for analysis. A crude  plant extraction process was carried out on the garlic cloves under optimum operating conditions to obtain the active compound (garlic extract). Each of the spoilt Ogbono seed was cut and washed and the content inoculated on Potato Dextrose Agar and Sabouraud Dextrose Agar respectively and incubated at  28oc and observed for three days after which , the different colonies obtained were identified using the slide culture technique. The fungal analysis shows that Aspergillus spp, Mucor spp, Fusarium spp and Penicillium spp are associated with  the spoilt of Ogbono seed with frequencies of occurrence of 37.50%, 25%,12.50% and 25% respectively. The antifungal activity of garlic seed extracts was determined on all fungi isolate. From the results it is clear that the antifungal activity in inhibiting fungi growth increases as the amount (concentration) of garlic extract increased. From the obtained fungi isolate, Aspergillus spp, Mucor spp, Fusarium spp, Penicillium spp at 5.00mg/ml, the zone of inhibition   were 12.333, 25.000, 17.338, and 0.000 respectively. No effects on the inhibition of Penicillium Spp growth were observed. It can be concluded from the study that   garlic extract showed antifungal activity against the tested fungi organism and it’s suitable in inhibiting growth of fungi in spoilt Ogbono seed.","PeriodicalId":251966,"journal":{"name":"Journal of Applied Chemical Science International","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126585080","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}

{"title":"SEVERAL SPUTTERING PARAMETERS AFFECTING THIN FILM DEPOSITION","authors":"Haroon Ejaz, Shabbir Hussain, Manzar Zahra, Qaisar Mehmood Saharan, Salman Ashiq","doi":"10.56557/jacsi/2022/v13i37590","DOIUrl":"https://doi.org/10.56557/jacsi/2022/v13i37590","url":null,"abstract":"Sputtering is a technique used for thin film deposition on different substrates for centuries. In this technique, the source atoms or electrons are bombarded on the target material that sputters target metal atoms. The emitted target atoms are deposited on the substrate in the form of thin films. Several sputtering parameters control the rate at which films are deposited. These sputtering parameters include voltage applied, sputter yield, type of the gas used, type of the target material used, type of the substrate on which the thin films are to be deposited, the working pressure of the system, power, temperature of the system and substrate, angle of incidence of bombardment and distance between target and substrate. These parameters are essential to have thin films of desired thickness and properties. These properties include electrical properties, thermal properties, optical properties and chemical properties as well.","PeriodicalId":251966,"journal":{"name":"Journal of Applied Chemical Science International","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127743624","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}

{"title":"POLYCYCLIC AROMATIC HYDROCARBON CONTENT IN WATER AND SEDIMENTS IN THE MIDDLE PART OF SHATT AL-ARAB RIVER- SOUTHERN IRAQ","authors":"A. Amer, A. H. Al-Khafaji, K. Kadhim, Mubeen Haseeb","doi":"10.56557/jacsi/2022/v13i37582","DOIUrl":"https://doi.org/10.56557/jacsi/2022/v13i37582","url":null,"abstract":"Polycyclic aromatic hydrocarbons are more carcinogenic and can remain in the water environment by the bioaccumulating in aquatic creatures like fish. The Shatt Al-Arab River begins north of Basrah City at the junction of the Tigris and Euphrates rivers and travels for about 190 kilometers till it reaches the Arabian Gulf. The current study included measuring the concentrations of polycyclic aromatic hydrocarbons (PAHs) in water and sediments of three sites chosen from the middle part of the Shatt Al-Arab River (Al-Ashar, Al-Karmah, and Al-Deir), and some environmental factors were measured, which included (Water Temperature, Dissolved Oxygen, pH, Electrical Conductivity, Salinity and Turbidity). The results of the current study showed that the concentrations of polycyclic aromatic hydrocarbons in water ranged between 6.01-21.7 ng/L, as well as the concentrations in sediments were ranged between 14.6 – 52.5 ng/g D.W. On the other hand the highest concentrations of PAHs appeared during winter while the lowest concentrations appeared during summer. Furthermore, the concentrations of polycyclic aromatic hydrocarbons in water and sediments were affected by the sites, seasons and a number of studied environmental factors, where the temperature was the most important factor.","PeriodicalId":251966,"journal":{"name":"Journal of Applied Chemical Science International","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121811968","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}

{"title":"PHI-PLOT OPTIMIZATION STUDIES OF SOLVENT GRADIENT SIMULATED MOVING BED (SG-SMB) SEPARATION OF THE AMINO ACIDS TRYPTOPHAN AND TYROSINE","authors":"A. G. Castro, L. Câmara","doi":"10.56557/jacsi/2022/v13i37546","DOIUrl":"https://doi.org/10.56557/jacsi/2022/v13i37546","url":null,"abstract":"The phi-plot optimization approach has been effectively used as a search routine to determine the best operational settings for solvent-gradient simulated moving bed process (SG-SMB) separation of various molecular combinations, such as amino acids. Modulating the solvent strength (SG-SMB) improves the performance of the simulated moving bed process-SMB, resulting in a significant increase in purities and productivity, as well as a reduction in solvent consumption. The amino acids tryptophan and tyrosine were separated using the phi-plot optimization method, which has never been investigated before in the context of SG-SMB process separation. The mass transfer kinetic parameters were determined through the chromatographic dynamic data and incorporated into the SG-SMB simulator for the validation of the optimization conditions by the Phi-plot method. A series of optimization studies were carried out varying the solvent concentration and the process flow rates in the context of triangle theory. The dynamic stepwise SG-SMB simulator was used to evaluate the ideal operational conditions for separation using the phi-plot optimization approach. For the conditions studied, the new phi-plot optimization approach was able to determine the optimal operational settings for producing high-purity separations in the extract and raffinate, which was validated by the simulator. The optimization results of the studied conditions were plotted in the triangle theory separation regions which confirms the optimization technique as a viable search routine for such complex task of determination of the best operational conditions of SG-SMB.","PeriodicalId":251966,"journal":{"name":"Journal of Applied Chemical Science International","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116344569","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}

{"title":"GREEN SYNTHESIS, CHARACTERIZATION AND ANTIMICROBIAL ACTIVITY OF PALLADIUM NANOPARTICLES : A REVIEW","authors":"S. Vinodhini, B. S. M. Vithiya, T. Prasad","doi":"10.56557/jacsi/2022/v13i37532","DOIUrl":"https://doi.org/10.56557/jacsi/2022/v13i37532","url":null,"abstract":"Nanoparticles are ultra-fine particles, thickness within a range of 100 nm in diameter. They are held responsible in enormous fields like diagnosis, bio-imaging, drug delivery, cancer therapy, environmental applications, biosensors, electronics, etc., due to their unique physicochemical properties. Among many noble metals, Palladium (Pd) is one such metal that has gained attention in this review. Plant-based biosynthesis has revealed the possibilities of synthesizing nanometric range palladium particles, their stabilization and impact of varying pH, temperature and concentration mostly on development and morphology with nanoparticles. the biosynthesized particles were determined using UV-Visible spectral analysis, FTIR, SEM, TEM - EDX as well as DLS technique whose findings were in support to the role of phytochemicals operating as reducing and stabilizing agents during the Pd (II) reduction to Pd(0). The antimicrobial activity of palladium nanoparticles (Pd NPs) synthesized from different plant extracts was also studied against various pathogens. The results showed the ability of Pd NPs to make the microbes susceptible by a clear zone of inhibition. Despite of all these experiments, the research demands further extensive study to bring out an exact mechanism for the process of Pd (II) reduction to Pd (0) and mode of action of Pd NPs against microbes.","PeriodicalId":251966,"journal":{"name":"Journal of Applied Chemical Science International","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127242877","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}

{"title":"FACILE GREEN SYNTHESIS, CHARACTERIZATION AND SOLAR ASSISTED PHOTOCATALYTIC EFFECT OF Ni2O3 USING Catharanthus roseus AQUEOUS EXTRACT","authors":"M. Sathiyapriya, A. Raja, K. Balasubramani","doi":"10.56557/jacsi/2022/v13i37517","DOIUrl":"https://doi.org/10.56557/jacsi/2022/v13i37517","url":null,"abstract":"The aim of this study was to prepare Ni2O3 nanoparticles by a green methods using the aqueous flower extract of Catharanthus roseus. The synthesized nanoparticles were characterized using UV-Visible diffuse reflectance spectroscopy (UV-vis-DRS), X- ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Scanning electron microscope (SEM) and Energy dispersive X-ray analysis (EDAX). XRD pattern showed confirmed the hexagonal primitive structure of green Ni2O3-NPs with size about 12.34 nm. SEM study reveals that the green Ni2O3-NPs exhibits a sphere shape structure. FT-IR spectra revealed the involvement of polysaccharide in the formation of green Ni2O3-NPs. Photocatalytic degradation of Bismarck brown (BB) dye was carried out using green synthesized green Ni2O3 NPs under solar light irradiation.The optimum condition for degradation is obtained by varying the experimental parameters like concentration, dose, and pH. The photocatalyst of green Ni2O3-NPs exhibit 99 % photocatalytic activity within 120 min. the maximum BB degradation was achieved with green Ni2O3-NPs concentration of 0.1 g/L, initial BB concentration of 10 mg/L at pH 5. Green method for synthesis of green Ni2O3-NPs using flower extracts has been suggested as a possible eco-friendly alternative to chemical and physical methods.  \u0000","PeriodicalId":251966,"journal":{"name":"Journal of Applied Chemical Science International","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121032583","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}

{"title":"RISK ASSESSMENT OF HEAVY METAL CONTAMINATION IN APPLES SOLD WITHIN AWKA METROPOLIS IN ANAMBRA STATE NIGERIA","authors":"Okeke Abuchi Princewill","doi":"10.56557/jacsi/2022/v13i27516","DOIUrl":"https://doi.org/10.56557/jacsi/2022/v13i27516","url":null,"abstract":"The intake of heavy metals through fruit consumption is a food safety problem that severely impacts the health of consumers; so information about food intake and heavy metal concentrations in food products is required to estimate the potential risk it poses to the health of the population. The aim of this study is to estimate the potential risks caused by heavy metals to human health from exposure to Cd, As, Pb and Hg through the intake of yellow and red apple considering the age group and gender. The concentration of each of the metals was quantified by spectrometry of atomic absorption (AAS) and the health risk indices such as health risk index (HRI), the hazard quotient (THQ) and the probability of carcinogenic risk (CR) through the consumption of apple were estimated. The concentrations of the metals analyzed in the apple samples shows the following decreasing order: Cd > Pb > As and Hg. The health risk assessments obtained from the samples of apples are located within the acceptable and tolerable limits; however, the increase in the intake of heavy metals through consumption of apples purchased from the study area may increase the health risk potential of consumers. For this reason, it is recommended to carry out studies on the concentration of heavy metals in various fruits products, mainly those of high demand, to guarantee food security of the population.","PeriodicalId":251966,"journal":{"name":"Journal of Applied Chemical Science International","volume":"309 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127012037","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}