Phytochemical analyses of aqueous extracts of two medicinal plants from Gabon: Pseudospondias longifolia and Antrocaryon klaineanum

Pseudospondias longifolia (Anacardiaceae) and Antrocaryon klaineanum (Anacardiaceae) are two plants used in the traditional medicine in Gabon. The aqueous extracts of their stem barks were phytochemically analysed. Alkaloids, saponins, tannins and reductor compounds were found in the extract of both plants. Flavonoids were only found in the extract of Pseudospondias longifolia whereas both extracts did not contain sterols and terpenoids. Keywords: Pseudospondias longifolia, Antrocaryon klaineanum, phytochemical, medicinal plants

Differential cross section measurements for the production of a W boson in association with jets in proton–proton collisions at √s = 7 TeV

Measurements are reported of differential cross sections for the production of a W boson, which decays into a muon and a neutrino, in association with jets, as a function of several variables, including the transverse momenta (pT) and pseudorapidities of the four leading jets, the scalar sum of jet transverse momenta (HT), and the difference in azimuthal angle between the directions of each jet and the muon. The data sample of pp collisions at a centre-of-mass energy of 7 TeV was collected with the CMS detector at the LHC and corresponds to an integrated luminosity of 5.0 fb[superscript −1]. The measured cross sections are compared to predictions from Monte Carlo generators, MadGraph + pythia and sherpa, and to next-to-leading-order calculations from BlackHat + sherpa. The differential cross sections are found to be in agreement with the predictions, apart from the pT distributions of the leading jets at high pT values, the distributions of the HT at high-HT and low jet multiplicity, and the distribution of the difference in azimuthal angle between the leading jet and the muon at low values.United States. Dept. of EnergyNational Science Foundation (U.S.)Alfred P. Sloan Foundatio

Optimasi Portofolio Resiko Menggunakan Model Markowitz MVO Dikaitkan dengan Keterbatasan Manusia dalam Memprediksi Masa Depan dalam Perspektif Al-Qur`an

Risk portfolio on modern finance has become increasingly technical, requiring the use of sophisticated mathematical tools in both research and practice. Since companies cannot insure themselves completely against risk, as human incompetence in predicting the future precisely that written in Al-Quran surah Luqman verse 34, they have to manage it to yield an optimal portfolio. The objective here is to minimize the variance among all portfolios, or alternatively, to maximize expected return among all portfolios that has at least a certain expected return. Furthermore, this study focuses on optimizing risk portfolio so called Markowitz MVO (Mean-Variance Optimization). Some theoretical frameworks for analysis are arithmetic mean, geometric mean, variance, covariance, linear programming, and quadratic programming. Moreover, finding a minimum variance portfolio produces a convex quadratic programming, that is minimizing the objective function ðð¥with constraintsð ð 𥠥 ðandð´ð¥ = ð. The outcome of this research is the solution of optimal risk portofolio in some investments that could be finished smoothly using MATLAB R2007b software together with its graphic analysis

Impacts of the Tropical Pacific/Indian Oceans on the Seasonal Cycle of the West African Monsoon

The current consensus is that drought has developed in the Sahel during the second half of the twentieth century as a result of remote effects of oceanic anomalies amplified by local land–atmosphere interactions. This paper focuses on the impacts of oceanic anomalies upon West African climate and specifically aims to identify those from SST anomalies in the Pacific/Indian Oceans during spring and summer seasons, when they were significant. Idealized sensitivity experiments are performed with four atmospheric general circulation models (AGCMs). The prescribed SST patterns used in the AGCMs are based on the leading mode of covariability between SST anomalies over the Pacific/Indian Oceans and summer rainfall over West Africa. The results show that such oceanic anomalies in the Pacific/Indian Ocean lead to a northward shift of an anomalous dry belt from the Gulf of Guinea to the Sahel as the season advances. In the Sahel, the magnitude of rainfall anomalies is comparable to that obtained by other authors using SST anomalies confined to the proximity of the Atlantic Ocean. The mechanism connecting the Pacific/Indian SST anomalies with West African rainfall has a strong seasonal cycle. In spring (May and June), anomalous subsidence develops over both the Maritime Continent and the equatorial Atlantic in response to the enhanced equatorial heating. Precipitation increases over continental West Africa in association with stronger zonal convergence of moisture. In addition, precipitation decreases over the Gulf of Guinea. During the monsoon peak (July and August), the SST anomalies move westward over the equatorial Pacific and the two regions where subsidence occurred earlier in the seasons merge over West Africa. The monsoon weakens and rainfall decreases over the Sahel, especially in August.Peer reviewe

Search for heavy resonances decaying to two Higgs bosons in final states containing four b quarks

A search is presented for narrow heavy resonances X decaying into pairs of Higgs bosons (H) in proton-proton collisions collected by the CMS experiment at the LHC at root s = 8 TeV. The data correspond to an integrated luminosity of 19.7 fb(-1). The search considers HH resonances with masses between 1 and 3 TeV, having final states of two b quark pairs. Each Higgs boson is produced with large momentum, and the hadronization products of the pair of b quarks can usually be reconstructed as single large jets. The background from multijet and t (t) over bar events is significantly reduced by applying requirements related to the flavor of the jet, its mass, and its substructure. The signal would be identified as a peak on top of the dijet invariant mass spectrum of the remaining background events. No evidence is observed for such a signal. Upper limits obtained at 95 confidence level for the product of the production cross section and branching fraction sigma(gg -> X) B(X -> HH -> b (b) over barb (b) over bar) range from 10 to 1.5 fb for the mass of X from 1.15 to 2.0 TeV, significantly extending previous searches. For a warped extra dimension theory with amass scale Lambda(R) = 1 TeV, the data exclude radion scalar masses between 1.15 and 1.55 TeV

Measurement of the top quark mass using charged particles in pp collisions at root s=8 TeV

Peer reviewe

Search for supersymmetry in events with one lepton and multiple jets in proton-proton collisions at root s=13 TeV

Peer reviewe

Search for anomalous couplings in boosted WW/WZ -> l nu q(q)over-bar production in proton-proton collisions at root s=8TeV

Peer reviewe

Investigating Eggplant Fruit (Solanum spp.) Cultivated in Côte d’Ivoire for Their Physicochemical and Antioxidant Characteristics

Eggplant is one of the most commonly consumed vegetables in Côte d’Ivoire. For this purpose, the nutrient constituents of eggplant varieties (Niguema, N’drowa, Aliona, Bello, Kotobi, Italy, Tiger, Kalenda and Gnangnan) were evaluated by standard procedures. The proximate composition in dry weight basis was significantly (P < 0.05) varied and ranged: dry matter 86.72-93.29%, crude protein 9.94-22.11%, crude fat 5.07-20.43%, crude fiber 23.15-50.53%, crude ash 5.14-10.09%, carbohydrate 12.41-39.22%, and energy value 211.53-320.94 kcal/100g. Gnangnan had the highest content in fat. Kalenda had the highest protein content, N’drowa had the highest fiber content, Bello had the highest content in carbohydrate, while Tiger presented the highest content in both ash and energy values. The phenolic content ranges from 618.28 to 977.35 mg/100g while the vitamin C ranges from 92.88 to 150.59 mg/100g in dry weight basis. Italy had the highest content in phenolic while Kalenda had the highest content in vitamin C. Interrelationships between the parameters analysed and the different eggplant varieties were investigated by principal component analysis (PCA). PCA revealed differences between the eggplant varieties and classified them into three clusters on the basis of the measured parameters: Cluster 1 (Gnangnan), Cluster 2 (Niguema, N’drowa, Italy and Aliona) and Cluster 3 (Bello, Kalenda, Kotobi and Tiger) This study is a contribution to the knowledge of the nutritional composition of eggplant cultivated in Côte d’Ivoire. In view of these results, eggplant can help to reduce the nutrition-related disorders in Africa. Keywords: Eggplant, Varieties, Proximate composition, Antioxidant DOI: 10.7176/FSQM/102-07 Publication date: November 30th 202