Annals of Chemical Science Research最新文献

{"title":"Inhibiting Effect of Different Carboxylic Acid on Uncatalysed and Co2O3 Catalysed Autoxidation of SO2 in Alkaline Medium- Brief Comparision","authors":"Prasad Dsn","doi":"10.31031/acsr.2020.02.000528","DOIUrl":"https://doi.org/10.31031/acsr.2020.02.000528","url":null,"abstract":"The results of the different carboxylic acids inhibited Co 2 O 3 catalysed autoxidation of S(IV) in alkaline medium have been shows that the reactions follow the free radical mechanism.","PeriodicalId":175500,"journal":{"name":"Annals of Chemical Science Research","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121537001","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":"Variation of Band Gap in Graphene Grown by Plasma Enhanced Chemical Vapor Deposition","authors":"Chang-Soo Park, Hee-Sang Kim","doi":"10.31031/acsr.2020.02.000529","DOIUrl":"https://doi.org/10.31031/acsr.2020.02.000529","url":null,"abstract":"Graphene is a two-dimensional monolayer with linear dispersion relation near the Dirac point and has attracted much interest owing to its superb material properties, such as very high mobility of 10,000 cm2/Vs at room temperature and quantum hall effect to promise for the potential in nanoelectronics [1-4]. However, graphene is a semimetal without an energy band gap which is required to be used as an electronic transistor. Recent studies have shown that band gap is formed at various situation, in nanoribbons, [5] bias-applied, and [6] strained or molecule-doped graphene [7,8]. Though the band gaps were generated in various structures, the control of the electrical properties is still a challenge. On the other hand, defects and impurities in graphene are important in electrical transport, because scattering is a hurdle in carrier transport in graphene, making the modulation of graphene transport quite important for physical and device application. In particular, defects in graphene have been intensely studied because quasi-localized states near the Fermi energy can be induced due to vacancy [9,10]. Here, we report that band gap engineering has been achieved by PECVD growth and plasma treatment can induce modulation of the defective properties of graphene. The graphene films were synthesized by plasma-enhanced chemical vapor deposition (PECVD) at 950 °C on sapphire substrate without catalyst, and the radio frequency plasma power was fixed at 150W. Carrier gas was argon (300sccm) and hydrogen (30sccm). The hydrocarbon, CH4 (1sccm) was used as a source precursor during the growth. Growth time was adjusted from 5min to 60min. Pristine graphene was identified as a bilayer using an optical microscope and Raman signal. Raman spectra of the graphene films were measured at an excitation of 514.5nm at room temperature using a spectrometer (Horiba Jobin-Yvon, HR800UV). The electrical transport was characterized as a function of temperature using low temperature measurement system (Sungwoo Instrument & Sumitomo). Crimson Publishers Wings to the Research Mini Review","PeriodicalId":175500,"journal":{"name":"Annals of Chemical Science Research","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126379930","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":"Synthesis of Cresols on Zeolite","authors":"Torosyan Gh","doi":"10.31031/acsr.2020.02.000526","DOIUrl":"https://doi.org/10.31031/acsr.2020.02.000526","url":null,"abstract":"The industrial method for the synthesis of cresols is technologically complicated, since the synthesis is carried out in an environment of sulfuric acid. Such a strong aggressive environment requires the use of anti-corrosion, expensive equipment, and the process itself creates the possibility of the formation of acidic wastewater [1]. Here is present the results of studies on the use of the previously found effective sorbent for phenol from the water solution-Armenian natural clinoptilolite modified with Ba salts, for use it as a catalyst in the phenol alkylation reaction.","PeriodicalId":175500,"journal":{"name":"Annals of Chemical Science Research","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131146649","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":"Metal Analysis in Rice Seedlings","authors":"P. Chooto","doi":"10.31031/acsr.2020.01.000525","DOIUrl":"https://doi.org/10.31031/acsr.2020.01.000525","url":null,"abstract":"Rice and rice products are widely consumed all over the world and the determinations of metals via a selection of techniques still play a leading role not only for the samples of rice grains but also extended to rice seedlings with the benefits of modifying essential elements into natural samples as well as to monitor the metal pathways and to envisage the mechanisms of metal uptake. In addition, there are a large number of parameters to be dealt with. To help those interested and favored to start or further their studies reach the purpose of these specific projects, this article provides the overview to understand the trend of upcoming research work concerning metal analysis in rice parts, products and environments.","PeriodicalId":175500,"journal":{"name":"Annals of Chemical Science Research","volume":"107 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116459456","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":"Analysis and Identification of two Soaps by Infrared Absorption Spectra and Reflectance Graphs","authors":"K. Chryssou","doi":"10.31031/acsr.2019.01.000523","DOIUrl":"https://doi.org/10.31031/acsr.2019.01.000523","url":null,"abstract":"Two soap bars one green and another white green were analyzed, and their total fatty matter content, unsaponifiable, un-saponified and un-saponified saponifiable matter content, ethanol-insoluble matter, and free caustic alkali content were determined. The infrared spectra of total lipids, unsaponifiable fats, and insoluble matter in ethanol, were recorded for the two soaps. The Kubelka-Munk K/S values were calculated using the expression depended on reflectivity R͚ of the observed soap’s surface, as well as the CIE L*a*b* values for both soaps.","PeriodicalId":175500,"journal":{"name":"Annals of Chemical Science Research","volume":"145 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132772243","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 Preliminary Assessment of Hydrogeochemical Quality of Groundwater around Rural Communities of Abandon Nkalagu Limestone Quarry. SE Nigeria","authors":"Eyankware Mo","doi":"10.31031/acsr.2019.01.000522","DOIUrl":"https://doi.org/10.31031/acsr.2019.01.000522","url":null,"abstract":"The study was conducted with the aim of assessing factors that influence groundwater geochemistry within the study area. Twenty-seven (27) groundwater samples were collected for major cations and anions were analysis. From the results obtained, it was observed that pH value fell within the slightly acidic to basic, values obtained from total dissolved solid showed that twenty six (26) groundwater samples fell within fresh water category, while one (1) groundwater sample fell within brackish water category, electrical conductivity ranges from 16.21 to 1136 µ S/cm. The study revealed that ion exchange and rock weathering are the major geochemical processes that influence groundwater chemistry within the study area. Parson plot revealed that groundwater samples are of different water type; Na-SO 4 , Na-Cl, Ca-Mg-SO 4 and Ca-Mg-Cl water type. Relationship between Na + /Cl¯ versus Ca 2+ / (HCO 3 ¯ + SO 42 ¯ ) showed that groundwater was classified under natural state. TDS versus TH plots revealed that groundwater within study area falls within soft-fresh water category, except sample NA-18. Finally, deduction from Soltan classification revealed that sample locations; NA-01, 02, 03, 04, 06, 07, 08, 10, 11, 12, 13, 15, 16, 17, 19, 21, 22, 23, 24 and 27 were classified under deep meteoric water type, while NA-05, 09, 14, 18, 20, 25 and 26 were classified shallow meteoric water type.","PeriodicalId":175500,"journal":{"name":"Annals of Chemical Science Research","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114826859","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":"The Problem of Commercial Application of Perovskite Solar Cells","authors":"Shiqing Bi","doi":"10.31031/acsr.2019.01.000521","DOIUrl":"https://doi.org/10.31031/acsr.2019.01.000521","url":null,"abstract":"Despite the power conversion efficiency (PCE) in organometal halide perovskite solar cells (PCSs) has achieved 23.7%, the prospect commercial application is not optimistic. The stability and repeatability of conversion efficiency from small-area devices to large-area devices are the main reasons for preventing commercialization. Here, we will discuss these two aspects in detail.","PeriodicalId":175500,"journal":{"name":"Annals of Chemical Science Research","volume":"61 5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126870953","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":"Chemical Design, Synthesis and Bio-efficacy Screening of New Growth Inhibitors of Spodoptera littoralis (Boisd.)","authors":"M. Gad","doi":"10.31031/ACSR.2019.01.000520","DOIUrl":"https://doi.org/10.31031/ACSR.2019.01.000520","url":null,"abstract":"Spodoptera littoralis (Boisduval) (Lepidoptera: Noctuidae) is considered one of the key pests that cause great damage to cotton plants as well as other plants in Egypt [1,2] larvae of this insect can feed on about ninety economically, monetarily and significant plant pertinence to forty families. The achieved control is not successful, when using synthetic insecticides [3] and some biorational agents for example Bacillus thuringiens is Berliner to resist the pest, because of the insect’s high ability to develop resistance toward most of traditional components [4]. Therefore, we need novel compounds that are efficient against this insect, safe to human and ecological well-disposed [5,6]. The substitutional control techniques that show presage as a potential tactic in S. littoralis the executive’s projects is the utilization of biorational control operators for example synthetic insect growth regulators and those dependent on normally materials [7]. Insect growth regulators are development controllers are ventured to be more secure for useful living beings than regular mixes, and they have been effectively utilized in IPM programs against many tree and little natural product [8,9]. There is a need for different insecticides having different modes of action Juvenile hormones analogues [10-13] sesquiterpenoid moieties arranged and discharged by the corpora allata, are significant insect hormones that standardize a bulky diversity of processes during postembryonic growth and adult reproduction in insects [14]. Juvenile hormone analogues display powerful creepy crawly adolescent hormone-mirror action, and consequently cause genuine aggravations in the advancement, multiplication, and conduct of a wide scope of bug [15-16]. This carbamate is utilized for pests’ control in farming, ranger service, and put away items, and is additionally utilized as a general wellbeing bug-spray Juvenile hormone analogue is recorded for control of caterpillars, and scales in Europe, and for flame ants in the U.S. Like most IGRs, fenoxycarb has surprisingly low human toxic quality and is significantly more bug particular than the ordinary bug sprays [17]. The main objective of this study was to determinate the toxicity of new growth inhibitors agents against the cotton leafworm, S. littoralis larvae under laboratory conditions. Crimson Publishers Wings to the Research Research Article","PeriodicalId":175500,"journal":{"name":"Annals of Chemical Science Research","volume":"308 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114416339","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":"Toxicity Alert: Hydrogen Sulfide","authors":"P. Chooto","doi":"10.31031/acsr.2019.01.000519","DOIUrl":"https://doi.org/10.31031/acsr.2019.01.000519","url":null,"abstract":"The way that there are greater and greater number of industrial factories especially petroleum and rubber together with greater amount of wastewater, garbage and pollution causes casualty loss as well as health problems repeatedly. Lately in southern Thailand, there is the case that workers did their jobs in wastewater treatment areas, causing loss of consciousness, serious harm and death due to hydrogen sulfide [1]. Therefore, greater recognition and awareness of this gas are essential which can lead to the prevention as well as careful plan for the operation to make it safer for life in the future.","PeriodicalId":175500,"journal":{"name":"Annals of Chemical Science Research","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126931455","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":"Design, Synthesis and Structural Inspection of Some Novel Di- And Tri-Azomethene Compounds as Chemo Sensors for the Detection of Various Metal Ions","authors":"Abdel-Rahman Lh, Abu-Dief Am, Abdellatif Aah","doi":"10.31031/acsr.2019.01.000518","DOIUrl":"https://doi.org/10.31031/acsr.2019.01.000518","url":null,"abstract":"Synthesis and designing of recent imine compounds with chemo-sensor or colorimetric, that is non-dangerous, eco-friendly and particularly sensitive and selective toward metals, are presently of splendid interest. Many natural sensors had been advanced to find out metallic ions which includes Mn(II)‏ [1], Fe(II)‏ [2], Co(II)‏ [3], Ni(II)‏ [4], Cu(II)‏ [5], Zn(II)‏ [6], Mn(II)‏ [7], VO(II) ‏[8], and Pd(II)‏ [9] in aqueous media. Imine compounds which having an azomethine group (-C=N-), are many of the maximum essential ligands utilized in modernday coordination chemistry because of their well-known coordinative functionality [10-18]. Those imines and their metal imine chelates have extensive utility in exceptional regions of electrochemistry [19], catalysis [20,21], solid phase extraction of metallic ions and separation routs [22], and several kinds of polymerization [23]. They’re additionally discovered to showcase a huge variety of organic activities, which have been containing antibacterial [24], antifungal [25], antimalarial [26], antiproliferative [27], anti-inflammatory [28], antiviral [29], antitumor [30,31] and antioxidant [32]. Furthermore, they may be turning into essential inside the corrosion inhibitors [33], extremely selective polymer membrane electrodes [34], optical sensors [35], and biological probes [36]. Different imines are organized by way of the condensation reaction of prime amines with vivacious carbonyl gatherings of aldehydes in one: one M proportion. on this work, it’s been intended to procure new colorimetric chemosensors for particular recognition of Cr(III)‏, Fe(II)‏, Co(II)‏, Ni(II)‏, Cu(II)‏, Zn(II)‏, Mn(II), VO(II) and Pd(II)‏ particles in aqueous media. Therefore, NBA imine containing nitro group, became prepared via an easy one-pot condensation of 3-nitro-benzaldyhide with 2-amino benzoic acid in 1:1 ratio, respectively while DAPH tri-iminewas synthesized by condensation of 2,6 -diacetyl-pyridine with phenyl-hydrazinium chloride, respectively. So, a new novel imine, that have greater binding nature toward metallic ions, had been synthesized as chemo-sensors. Crimson Publishers Wings to the Research Research Article","PeriodicalId":175500,"journal":{"name":"Annals of Chemical Science Research","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131285101","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}