First derivative

The study aims to assess the diesel oil adsorption capacity of activated carbon derived from rambutan peel, a prevalent agricultural by-product in Vietnam. The adsorption process will be investigated using various adsorption isotherms (Langmuir, Freundlich, Temkin, Dubin-Radushkevich), adsorption kinetics (pseudo-first order and pseudo-second order).

18p vibecca 01-10-2024 2 1   Download

To evaluate the efficacy and safety of TS1-Cisplatin regimen in the first - line treatment of metastatic gastric cancer patients. Methods: 38 eligible patients were treated with TS1-cisplatin at Hanoi Medical University Hospital from January 2018 to December 2021.

5p vinatisu 29-08-2024 2 0   Download

In the present report, a novel concept of frequency response function (FRF) is introduced for piezoelectric beam. First, a model of Timoshenko beam bonded with a piezoelectric layer is established and used for deriving the conventional frequency response function acknowledged as mechanical frequency response function (MERF). Then, the output charge produced in the piezoelectric layer is calculated from the MFRF and therefore obtained frequency-dependent function is called electrical frequency response function (EFRF) for the integrated beam.

16p dianmotminh02 03-05-2024 5 1   Download

Compared to RNA-sequencing transcript differential analysis, gene-level differential expression analysis is more robust and experimentally actionable. However, the use of gene counts for statistical analysis can mask transcript-level dynamics. We demonstrate that ‘analysis first, aggregation second,’ where the p values derived from transcript analysis are aggregated to obtain gene-level results, increase sensitivity and accuracy.

11p vimichaelfaraday 25-03-2022 13 3   Download

The microvessels area (MVA), derived from microvascular proliferation, is a biomarker useful for highgrade glioma classifcation. Nevertheless, its measurement is costly, labor-intense, and invasive. Finding radiologic cor‑ relations with MVA could provide a complementary non-invasive approach without an extra cost and labor intensity and from the first stage.

13p vielonmusk 21-01-2022 8 0   Download

In this paper, I mention the approximate calculation of the function value at a point, based on the first derivative at its neighborhood points. The article shows which function classes can be applied to approximate. The paper also points out the importance of approximation as an estimate of the error of that calculation.

6p tamynhan9 02-12-2020 7 2   Download

This paper presents a new penalty function called logarithmic penalty function (LPF) and examines the convergence of the proposed LPF method. Furthermore, the LaGrange multiplier for equality constrained optimization is derived based on the first-order necessary condition.

10p tohitohi 22-05-2020 13 0   Download

This paper presents a numerical solution for vibration analysis of cantilevered non-uniform trapezoidal thick plates. Based on the first shear deformation theory, kinetic and strain energies of the plate are derived and using Hamilton's principle, governing equations and boundary conditions are derived.

22p tohitohi 19-05-2020 18 0   Download

The effects of mismatch parameters on isochromatic fringe patterns were studied using the technique of photoelasticity. First, the mathematical equations of isochromatic fringes were derived for singular stress field near a bi-material notch.

6p tohitohi 19-05-2020 7 0   Download

Three natural compounds including betulin (1), betulinic acid (2) and lupeolactone (3) were isolated from the dichloromethane extract of Helicteres hirsuta Lour. for the first time. Their structures have been elucidated by modern spectroscopic methods as IR, 1H-NMR, 13C-NMR, DEPT, HSQC, HMBC, MS and by comparison with those of previously reported data.

8p slimzslimz 08-12-2019 38 1   Download

Some issues on inflectional and derivational morphology in English; Using VOA special English in teaching listening skill for the first year international relation cadets at Military Science Academy; A study on English reading strategies employed by construction engineering students at University of Transport and Communications....

124p kethamoi 02-10-2019 34 1   Download

This paper proposes a hydrodynamic/sediment model for simulating bedload sediment through a river section. Firstly, flow characteristics such as depth-averaged velocity were obtained by solving the governing equation, which is derived from the Reynolds equations and allows for taking into account the gravity, bed shear stress, turbulent diffusion force and secondary flow in calculations.

8p thihuynh3006 16-03-2018 49 0   Download

From the methanol extract of the leaves of Chlorophytum laxum R. Br. (Athericaceae), a new (1) and two known (2, 3) derivatives of furancarboxaldehyde, and a derivative of anthraquinone (4) were isolated by various chromatography methods. Their structures were elucidated as 5- (ethoxymethyl)-2-furancarboxaldehyde (1), 5-hydroxymethyl-2-furancarboxaldehyde (2) and cirsiumaldehyde (3) and 1,5-dihydroxy-3-hydroxymethylanthraquinone (4) by analyses of the NMR (1D-, 2D-NMR), EI-MS and ESI-MS spectra. This is the first report of 2, 3, and 4 from C. laxum.

5p uocvong04 24-09-2015 45 4   Download

The first objective of Kalman filtering With a radar tracking implementation is to give deep enough insight into the mathematics of the Kalman filter algorithm to be able to choose the correct type of algorithm and to set all the parameters correctly in a basic application. This description also includes several examples of different approaches to derive and to explain the Kalman filter algorithm.

48p tieuluanhoangduy 15-06-2015 62 6   Download

First the notion "paraphrase" is defined, and then several different types of paraphrase are analyzed: transformational, attenuated, lexical, derivational, and real-world. Next, several different methods of retrieving information are discussed utilizing the notions of paraphrase defined previously.

11p nghetay_1 06-04-2013 37 1   Download

Limited proteolysis in combination with liquid chromatography-ion trap mass spectrometry (LC-MS) was used to analyze engineered or natural proteins derived from a type I modular polyketide synthase (PKS), the 6-deoxyerythronolide B synthase (DEBS), and comprising either the first two extension modules linked to the chain-terminating thioesterase (TE) (DEBS1-TE); or the last two extension modules (DEBS3) or the first exten-sion module linked to TE (diketide synthase, DKS).

15p awards 06-04-2013 38 1   Download

UDP-glucose dehydrogenase catalyzes the NAD + -depend-ent twofold oxidation of UDP-glucose to give UDP-glucu-ronic acid. A sequestered aldehyde intermediate is produced in the first oxidation step and a covalently bound thioester is produced in the second oxidation step. This work demon-strates that theStreptococcus pyogenesenzyme incorporates a single solvent-derived oxygen atom during catalysis and probably does not generate an imine intermediate.

9p dell39 03-04-2013 46 3   Download

Plumbago indicaL. contains naphthoquinones that are derived from six acetate units. To characterize the enzyme catalyzing the first step in the biosynthesis of these metabolites, a cDNA encoding a type III polyketide synthase (PKS) was isolated from roots of P. indica. The translated poly-peptide shared 47–60% identical residues with PKSs from other plant spe-cies.

12p inspiron33 23-03-2013 30 4   Download

2C-Methyl-d-erythritol-4-phosphate synthase, encoded by the ispC gene (also designated dxr), catalyzes the first committed step in the nonmevalo-nate isoprenoid biosynthetic pathway. The reaction involves the isomeriza-tion of 1-deoxy-d-xylulose 5-phosphate, giving a branched-chain aldose derivative that is subsequently reduced to 2C-methyl-d-erythritol 4-phos-phate.

14p galaxyss3 07-03-2013 47 4   Download

One of several potential approaches to study mechanisms of action of bio-logically active compounds is to develop their agonists and antagonists. In the present study, we report the identification of the first known molecule antagonizing the activity of the plant hormone cytokinin at the receptor level.

10p vinaphone15 27-02-2013 33 2   Download