2,4-Dinitro-1-naphthyl 4-toluene­sulfonate

In the title compound, C17H12N2O7S, the dihedral angle between the benzene ring and the naphthyl plane is 26.34 (6)°. The nitro groups make dihedral angles of 40.09 (4) and 37.05 (3)° with the naphthyl plane. In the crystal structure, weak intra- and inter­molecular C—H⋯O inter­actions are observed

‘Child’s play’ is ‘work’…is the view in Steiner-Waldorf early childhood education

Remember your own childhood days. Whizzing recklessly down the street, we boys with short knickers, with bruised knees and triumphant facial expressions and a stick in hand wheeled old and disused scooter tyres. We stood on the steps of the entrance and played “On the bank-In the river” in its myriad variations. We simply sat down and played with the traditional five stones, tamarind seeds or sea shells. We roamed in our own groups and made adventurous journeys picking mangoes and guavas. We ran, we played, we laughed, we climbed trees and we fell and we got back to our feet again and most importantly we sweated. A reminder call from our parents and we were inside the house to wash ourselves and study or eat the simple meal together as a family. TV was an uncommon device

PHYTOCHEMICAL ANALYSIS OF RUELLIA PATULA USING GAS CHROMATOGRAPHY‑MASS SPECTROMETRY

ABSTRACTObjective: Ruellia patula (Jacq.) a medicinally important plant belongs to the family Acanthaceae. Traditionally, the leaves are used in the treatment ofmany diseases such as insect bites, itches, eye diseases, and skin problems. In the present study, the qualitative and quantitative analysis of bioactivecompounds by gas chromatography (GC) and mass spectroscopy (MS) techniques.Methods: The chemical compositions of the ethanol extract of R. patula leaves were investigated using Perkin–Elmer GC‑MS.Result: In the GC‑MS analysis of ethanol extract of R. patula L. reported the presence of 15 compounds. The major compound constituents are 3, 7, 11,15‑tetramethyl‑2‑hexadecen‑1‑ol (28.75%), and α‑sitosterol (14.35%).Conclusion: Identification of these compounds can help in the development of new drugs.Keywords: Ruellia patula, Ethanol extract, Phytochemical compounds, gas chromatography‑mass spectroscopy analysis, Biological activity ofphyto‑components

Methyl 6-(4-chloro­phen­yl)-2,4-dimethyl-1,3-dioxo-1,2,3,4,6,6a,7,12b-octa­hydro­chromeno[4′,3′:4,5]pyrano[2,3-d]pyrimidine-6a-carboxyl­ate

In the title compound, C24H21ClN2O6, the two fused six-membered pyran rings adopt half-chair conformations. The dihedral angle between the pyrimidine ring and the chloro­phenyl ring is 51.55 (3)°. In the crystal, mol­ecules are linked by pairs of weak inter­molecular C—H⋯O hydrogen bonds, forming inversion dimers. A C—H⋯π inter­action is also observed

Mineral Composition of Marine Macroalgae from Mandapam Coastal Regions; Southeast Coast of India

The present study focused on the trace metal and mineral composition analysis of various seaweeds such as Chlorophyceae (Cladophora glomerata, Ulva reticulata, Halimeda macroloba, H.tuna), Phaeophyceae (Dictyota dichotoma, Padina pavonica) Rhodophyceae (Gracilaria crassa, Gelidiella acerosa, Hypnea musciformis) collected from Mandapam coastal regions, Southeast coast of India. Among these groups of seaweeds, U. reticulata belonging to the Chlorophyceae showed the maximum contents of mineral elements such as chromium, copper, and magnesium. H.tuna observed the minimum level of mineral content such as cobalt, iron, magnesium, manganese, nickel, lead and zinc

2-(5,7-Dimeth­oxy-4-oxo-4H-chromen-2-yl)phenyl 4-toluene­sulfonate

In the crystal structure of the title compound, C24H20O7S, the chromone system makes a dihedral angle of 37.32 (7)° with the adjacent benzene ring. The chromone ring system and the tolyl ring are almost parallel, with a dihedral angle of 4.56 (9)°. The tolyl ring is twisted at an angle of 41.75 (6)° with respect to the benzene ring. Weak intra- and inter­molecular C—H⋯O inter­actions are observed

Methyl 3-(4-isopropyl­phen­yl)-1-phenyl-3,3a,4,9b-tetra­hydro-1H-chromeno[4,3-c]isoxazole-3a-carboxyl­ate

In the title compound, C27H27NO4, the five-membered isoxazole ring adopts an envelope conformation and the six-membered pyran ring adopts a half-chair conformation. The dihedral angle between the mean planes of the isoxazole ring and the chromene ring system is 54.95 (4)°

1-[2-(2,4-Dinitro­benzyl­ideneamino)phen­yl]-3-phenyl­thio­urea

In the title compound, C20H15N5O4S, the central benzene ring makes dihedral angles of 59.5 (1) and 51.7 (1)°, respectively, with the terminal phenyl and benzene rings. The mol­ecular structure exhibits weak intra­molecular N—H⋯N and C—H⋯S inter­actions. In the crystal structure, mol­ecules are linked by weak inter­molecular N—H⋯S and C—H⋯O inter­actions, forming a chain along [11]