Synthesis of gum acacia-cl-acrylic acid-co-itaconic acid hydrogels for efficient removal of toxic dye rhodamine-B: A step for sustainable environment.

In the present study, we prepared Gum Acacia-cl-Acrylic acid-co-itaconic acid (GA-cl-AA-co-IA) hydrogels by free radical crosslink polymerization method for the efficient removal of Rhodamine-B (RhB) dye. The hydrogels were further characterized by different characterization techniques: Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), thermogravimetric analysis (TGA), Atomic force microscopy (AFM), Brunuer-Emmett-Teller (BET) and field emission scanning electron microscopy (FE-SEM) to confirm synthesis. The synthesis parameters were optimized by swelling studies, which were performed by gravimetric analysis method.

Gum acacia based hydrogels and their composite for waste water treatment: A review.

The non-toxic nature of natural polysaccharides and their biodegradability makes them the first choice of researchers. Various natural polysaccharides are available nowadays, like cellulose, starch, chitosan, gum acacia, guar gum etc. Among these, gum acacia is a common natural polysaccharide presently used in research and technology.

Variations in the concentration, source activity, and atmospheric processing of PM-associated water-soluble ionic species over Jammu, India.

Concentrations, sources, and atmospheric processing of water-soluble ionic species associated with PM collected from 2015 to 2017 were studied in Jammu, an urban location in the North-Western Himalayan Region (NWHR). Being ecologically sensitive and sparsely studied for dynamics in PM and associated WSIS, the present study is important for developing robust air pollution abatement strategies for the air-shed of NWHR. Twenty-four hourly PM samples were collected on weekly basis at a receptor site and analyzed for WSIS using ion chromatography system.

Particulate bound polycyclic aromatic hydrocarbons over Dhauladhar region of the north-western Himalayas.

A systematic yearlong study was carried out in Dhauladhar region of the North-Western Himalayas to investigate dynamics in the composition and concentration of particulate bound polycyclic aromatic hydrocarbons (PAHs) and their source(s) activity. PM samples were collected for 24 h, once every week during January 2015-January 2016, at an urban mid-altitude site (Dharamshala) and a rural low-altitude site (Pohara). PAHs were identified and quantified using high performance liquid chromatography coupled with UV-detector.

Water-soluble ionic species in atmospheric aerosols over Dhauladhar region of North-Western Himalaya.

Water-soluble ionic species (WSIS) have been used as potential markers for different source(s) and underlining process(es) emitting and transforming atmospheric aerosols. PM aerosol sampling was performed once in a week for a complete one year, at a mid-altitude urban and a low-altitude rural location simultaneously in the Dhauladhar region of the North-Western Himalaya. Aerosol samples were analysed for major WSIS (anions: F, Cl, NO, PO and SO; cations: Na, NH, K, Ca and Mg) using the ion chromatography system.

Aerosol-associated n-alkanes over Dhauladhar region of North-Western Himalaya: seasonal variations in sources and processes.

Particulate n-alkanes are major constituents of organic aerosols (OA). Being primary in origin, chemically stable and thus long-lived, n-alkanes retains source signatures and along with diagnostic parameters have extensively been used to identify source(s) of OA. Systematic, yearlong study was carried out in the Dhauladhar region of North-Western Himalaya (NWH) to investigate dynamics in the composition and concentration of aerosol-associated n-alkanes.

Wintertime carbonaceous aerosols over Dhauladhar region of North-Western Himalayas.

Carbonaceous aerosols play an important role in affecting human health, radiative forcing, hydrological cycle, and climate change. As our current understanding about the carbonaceous aerosols, the source(s) and process(es) associated with them in the ecologically sensitive North-Western Himalayas are limited; this systematic study was planned to understand inherent dynamics in the mass concentration and source contribution of carbonaceous aerosols in the Dhauladhar region. During four winter months (January 2015-April 2015), 24-h PM samples were collected every week simultaneously at the rural site of Pohara (32.

A systematic analysis of cell cycle regulators in yeast reveals that most factors act independently of cell size to control initiation of division.

Upstream events that trigger initiation of cell division, at a point called START in yeast, determine the overall rates of cell proliferation. The identity and complete sequence of those events remain unknown. Previous studies relied mainly on cell size changes to identify systematically genes required for the timely completion of START.