Packing density

The molecular structure of bis(2‒isobutyrylamidophenyl)amine (H3 LNNN) has been determined from single‒crystal X-ray diffraction data. The crystal packing of H3 LNNN is governed by the N–H⋯O and C–H⋯O hydrogen-bonding and C–H⋯π stacking interactions between the vicinal molecules. The intermolecular interactions in the crystal structure of H3 LNNN have been also examined via Hirshfeld surface analysis and fingerprint plots. The Hirshfeld surface analysis showed that the important role of N–H⋯O and C– H⋯π interactions in the solid‒state structure of H3 LNNN.

33p langthannam 29-12-2021 7 0   Download

This paper proposes a new method of mix design for UHPC using high volume fly ash (HVFA), that is referred to the particle packing optimization of the Compressive Packing Model proposed by F. de Larrard. This proposed method also considers the heat treatment curing duration to maximize the compressive strength of HVFA UHPC.

12p inception36 30-11-2021 15 0   Download

Ketoprofen and isoniazid together are a potential combination of a nonsteroidal antiinflammatory drug and an antitubercular medicine to treat tuberculosis and associated symptoms like fever and fatigue. The Schiff base of isoniazid with ketoprofen is synthesized in this research. Infrared spectroscopy (IR) and X-ray diffraction (XRD) analysis of the crystal packing proved the formation of the Schiff base and the existence of N-H···O hydrogen bonds between the hydrogen-bonded dimer of the Schiff base.

23p tudichquannguyet 29-11-2021 15 0   Download

In some recently experiments with virus, Abstract their core part are DNA tightly packed with very high charge density. The contribution of this highly charged part to the electrical field outside virus now cannot be easily neglected in general case. In this work we propose a simple core-shell model for this type of soft particles and virus.

10p vijichoo2711 04-06-2021 17 1   Download

The study was under taken to assess the impact of differential in-pack gaseous conditions generated through modified atmosphere packaging (MAP) using different packaging films (low density polyethylene (LDPE) and polypropylene (PP), having thickness 150 guage and bag area 0.14m2 ) with and without perforations and variable head space (HS) on the quality of broccoli stored for 10 days at 15°C and relative humidity (RH) of 75%.

14p chauchaungayxua8 03-10-2020 11 1   Download

Studies were carried out to find out the influence of different packaging materials on the seed quality parameters of chickpea. Freshly harvested and fully matured chickpea grains (cv. GJG-3) were cleaned, sorted, graded and dried up to 7.6 % (w.b.) moisture content for safe storage. The dried grains were packed in different packaging materials viz.

10p quenchua6 15-06-2020 20 2   Download

In the last decade most of the developed countries entered into a new packaging trend called tray packaging which was unexplored in India especially for meat and meat products.

16p trinhthamhodang3 12-02-2020 18 0   Download

The experiment aim to evaluate the packaging material for extending the shelf life of pomegranate with retaining better fruit quality attributes. Freshly harvested pomegranate fruits packed in low density polyethylene (LDPE) (25 micron), polypropylene (PP) (25 micron), cling film and cellophane paper film. Among all these packaging materials, the pomegranate fruits packed in LDPE 25 micron film had the least reduction in physiological loss in weight, minimal decay loss and highest ascorbic acid content.

9p nguathienthan2 19-12-2019 18 0   Download

Experiments were conducted to development, quality evaluation and storage stability of multi- flour noodles made from wheat flour, soya bean flour, carrot powder, mushroom flour and apple pomace powder. The noodles were formulated by taking different proportion of multi-flours in the ratio of (T100) 100:0:0:0:0, (T90) 90:2.5:2.5:2.5:2.5, (T80) 80:5.0:5.0:5.0:5.0, (T70) 70:7.5:7.5:7.5:7.5, (T60) 60:10:10:10:10 and (T50) 50:12.5:12.5:12.5:12.5 respectively. Wheat flour of the ratio of 100:0:0:0:0 was considered as control.

6p kethamoi2 15-12-2019 21 1   Download

Pumpkin belongs to cucurbitaceae family grown widely in tropical and sub-tropical countries. Pumpkins are the sources of various functional compounds such as carotenoids, vitamins, minerals, dietary fibres, etc. Therefore, an attempt was made by drying of pumpkin for production of flour and its quality evaluation during storage. Different pre-treatments were applied to pumpkin shreds to standardize the method for preparation of pumpkin flour on the basis of chemical quality.

12p cothumenhmong1 11-12-2019 13 0   Download

Chromium has been recognized as a new and important micro-nutrient, essential for both human and animal nutrition. This study was conducted to evaluate the appropriateness and/or the use of safety level of dietary chromium picolinate (Cr-Pic), and its effects on the physiological responses, the histometric characteristics, and the chemical analysis of dorsal muscles of mono-sex Nile tilapia, Oreochromis niloticus. niloticus. A total of 420 fingerlings (28.00 ± 0.96 g) were randomly distributed into 21 fiberglass tanks representing seven treatments at a rate of 20 fish m3 .

8p kethamoi1 17-11-2019 18 0   Download

We develop an analogue for sphere packing of the linear programming bounds for error-correcting codes, and use it to prove upper bounds for the density of sphere packings, which are the best bounds known at least for dimensions 4 through 36. We conjecture that our approach can be used to solve the sphere packing problem in dimensions 8 and 24. Contents 1. Introduction 2. Lattices, Fourier transforms, and Poisson summation 3. Principal theorems 4. Homogeneous spaces 5. Conditions for a sharp bound 6. Stationary points 7. Numerical results 8. Uniqueness Appendix A. ...

27p tuanloccuoi 04-01-2013 46 5   Download

Sphere packings is one of the most fascinating and challenging subjects in mathematics. Almost four centuries ago, Kepler studied the densities of sphere packings and made his famous conjecture. Several decades later, Gregory and Newton discussed the kissing numbers of spheres and proposed the Gregory-Newton problem. Since then, these problems and related ones have attracted the attention of many prominent mathematicians such as Blichfeldt, Dirichlet, Gauss, Hermite, Korkin, Lagrange, Minkowski, Thue, Voronoi, Watson, and Zolotarev, as well as many active today....

256p maket1311 16-10-2012 38 2   Download

The benchmark guide for compressor technology pros You don't have to scour piles of technical literature for compressor answers any longer. The Compressor Handbook compiled by Paul Hanlon packs all the answers on design procedures, practical application, and maintenance of compressors—straight from top experts on these widely used machines.

760p beobobeo 01-08-2012 120 26   Download

Tuyển tập các báo cáo nghiên cứu khoa học về toán học trên tạp chí toán học quốc tế đề tài: Determining Lower Bounds for Packing Densities of Non-layered Patterns Using Weighted Templates...

10p thulanh6 15-09-2011 57 1   Download

Tuyển tập các báo cáo nghiên cứu khoa học trên tạp chí toán học quốc tế đề tài: Packing densities of patterns...

16p thulanh5 13-09-2011 43 2   Download

For n  2, let PG(n, 2) be the finite projective geometry of dimension n over F2, the field of order 2. The elements or points of PG(n, 2) are the one-dimensional vector subspaces of Fn+1 2 ; the lines of PG(n, 2) are the two-dimensional vector subspaces of Fn+1 2 . Each such one-dimensional subspace {0, x} is represented by the non-zero vector x contained in it. For ease of notation, if {e0, e1, . . . , en} is a basis of Fn+1 2 and x is an element of PG(n, 2), then we denote x by a1 . . .as, where x = ea1 +·...

7p thulanh5 12-09-2011 34 2   Download

Tuyển tập các báo cáo nghiên cứu khoa học ngành toán học tạp chí toán học quốc tế đề tài: The packing density of other layered permutations

16p lame_266 12-09-2011 23 1   Download

Tuyển tập các báo cáo nghiên cứu khoa học ngành toán học tạp chí toán học quốc tế đề tài: On packing densities of permutations...

20p thulanh4 11-09-2011 54 1   Download

The column is the only device in the high-performance liquid chromatography (HPLC) system which actually separates an injected mixture. Column packing materials are the “media” producing the separation, and properties of this media are of primary importance for successful separations.

64p bigbaby87 03-09-2010 130 32   Download