Liquid nitrogen
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Part 2 book "Gas purification" includes content: Water as an absorbent for gas impurities; sulfur dioxide removal; sulfur recovery processes; liquid phase oxidation processes for hydrogen sulfide removal; control of nitrogen oxides.
531p muasambanhan06 01-02-2024 4 2 Download
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This study investigates the ability of a self-fabricated bio-trickling filter using commercial polyurethane foam as bio-media for treatment of odor-causing gases (e.g., ammonia, hydrogen sulfide, and mercaptans) under different nitrogen loadings in gas and liquid phases.
19p visystrom 22-11-2023 6 2 Download
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In recent years, studies have been carried on the selection and breeding of melon to reduce its production cost. The F1 seeds of this species are usually created by parental lines. Notably, the parental lines are separated from each other to secure the breeding materials.
8p vicaptainmarvel 21-04-2023 4 2 Download
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A study on the effect of the physical states of nitrogen on the breakdown properties of glass fiber reinforced epoxy was carried out. Surface breakdown and volume breakdown of glass fiber reinforced epoxy in nitrogen gas, cryogenic nitrogen gas and liquid nitrogen under AC voltages were investigated.
9p vidudley 20-02-2023 5 2 Download
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Imidazole derivatives are one of the most important classes of nitrogen-containing five-membered heterocycles with a wide range of biological activities. Thus, the synthesis of these heterocycles has attracted intensive research interest.
8p vidudley 20-02-2023 5 2 Download
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A laboratory method for the acid-free synthesis of S-nitrosothiols (RSNO) from NaNO2 and thiols in aqueous buffer of neutral pH is reported. Equimolar amounts of NaNO2 and thiol are added to a 100-µM Na 4EDTA-containing Na2HPO4 buffer (100 mM, pH 7.4). Samples are set into liquid nitrogen for 1 min and then thawed to room temperature or in an ice bath. Dependent upon the RSNO, repetition of the procedure may be required. This method may be of particular importance when the classical acid-based method fails or releases harmful gases such as H2S.
7p langthannam 29-12-2021 11 0 Download
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Chitosan passivated carbon nanodots (C-Dots CHIT) were synthesized from expired molasses via a simple and green thermal synthesis procedure. As-synthesized C-Dots were nitrogen-doped (NC-Dots CHIT) by posttreatment with liquid ammonia and used as nanoprobes for fluorometric detection of mercury ions (Hg(II) aq.). Fluorescence response of NC-Dots CHIT in the presence of mercury was evaluated and compared with that of the polyethylene glycol passivated C-Dots P EG . This sensing strategy using NC-Dots CHIT displayed a wide linear working range from 1.25 µg/mL to 43.
13p tudichquannguyet 29-11-2021 14 3 Download
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Liquid phase tandem Knoevenagel–Michael condensation of various aromatic and heteroaromatic aldehydes with barbituric acid or 2-thiobarbituric acid and malononitrile was studied in a one-pot three-component reaction. For the first time, TMDP was employed as a safe and efficient solvent and/or catalyst in the liquid and aqueous ethanol medium, respectively, for the practical and eco-friendly Knoevenagel–Michael condensation.
10p tudichquannguyet 29-11-2021 8 1 Download
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Conserving the plant genetic resources through any means is of utmost importance to prevent the loss of plant biodiversity. Long-term storage using liquid nitrogen (LN) is usually adopted for developing long-term base collections of crops for use in the distant future. The fruit crops are commonly propagated through vegetative means and are majorly conserved as ex situ field gene banks, which require large areas and demand intensive field management.
11p chauchaungayxua10 19-03-2021 8 2 Download
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Epiphyseal-preservation surgery for osteosarcoma is an alternative method which has been indicated carefully to selected patients. The tumor-devitalised autograft treated with liquid nitrogen procedure is one of the biological reconstruction method to reconstruct the defect after tumor excision.
10p vitennessee2711 01-02-2021 8 2 Download
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This study was conducted with synthetic wastewater from urea and ammonia (representing nitrogen fertilizer production wastewater) and additional carbon source of methane (CH4). Methane and air were supplied to microbial liquid phase using a bubble air stone aerator located at the bottom of a bioreactor with methane gas flowrate ranges from 1 to 2 L/h, air flowrate ranges from 3 to 6 L/h.
10p cothumenhmong9 07-01-2021 11 2 Download
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Limb salvage surgery is becoming increasingly popular after tumor resection in the lower extremity. Biological reconstruction and use of megaprosthesis are main methods for malignant bone tumors of the proximal femur, which remain controversial due to short- and long-term complication in the proximal femur.
8p vipalau2711 30-12-2020 6 1 Download
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There have been several reports of instrumentation failure after three-column resections such as total en bloc spondylectomy (TES) for spinal tumors; however, clinical outcomes of revision surgery for instrumentation failure after TES are seldom reported. Therefore, this study assessed the clinical outcomes of revision surgery for instrumentation failure after TES.
8p vimariana2711 22-12-2020 13 1 Download
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Green gram is a widely cultivated pulse crop rich in protein, essential amino acids and vitamin-B. The quality and quantity of DNA are very important for amplification by PCR. Although quantity of DNA required per reaction in PCR is very low, quality is very crucial. Also, to carry out large number of PCR reactions for genotyping, a good amount of DNA is required. Presence of contaminants like phenols makes it difficult to get good quality DNA from mungbean.
9p caygaocaolon8 07-11-2020 15 2 Download
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The present experiment was undertaken to study effect of nitrogen fixing and phosphate solubilizing bacteria on growth of seedlings of chilli cv. GVC 111 in nursery with the ultimate aim to provide healthy transplantable seedlings for raising the healthy crop.
6p angicungduoc8 07-11-2020 11 2 Download
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Field experiments were conducted from 2010 to 2012 at Zonal Agricultural Research Station, Mandya to study the effect of farmyard manure and bio-digester liquid manure on the performance of aerobic rice – field bean cropping sequence. Soil was red sandy loam in texture, low in organic carbon (0.38 %) and available nitrogen (215.5 kg ha-1 ), medium in available P2O5 (26.2 kg ha-1 ) and K2O (162.3 kg ha-1 ).
10p kequaidan7 01-09-2020 11 1 Download
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The study was undertaken to isolate the DNA of good quality from the banana wilt pathogen Fusarium oxysporum f. sp. cubense (Foc) directly from infected tissues for molecular studies. In this method, laborious and time-consuming procedures such as isolation of the pathogen and its artificial cultivation are avoided. Moreover, grinding of the fungal mycelium using liquid nitrogen is also not needed as the DNA is directly extracting from infected banana tissues.
7p nguaconbaynhay7 15-08-2020 13 1 Download
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A simple and easy protocol for isolation of DNA from major plant pathogen Alternaria spp has been developed in which DNA extracted using CTAB extraction method from fresh mycelium of fungi crushed with sterile sand particles and liquid nitrogen. The DNA was precipitated first with equal volume of phenolchloroform-isoamylalcohol (25:24:1) and further with equal volume of chloroform-isoamylalcohol (24:1). Repeated centrifugation was done at 10000 g for 10 minutes at room temperature.
4p angicungduoc6 22-07-2020 11 1 Download
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Air pollution is a heterogeneous, complex mixture of gases, liquids, and particulate matter. Air pollution has become increasingly visible in cities and towns across world. Many factors contribute to air pollution including industry, lack of vehicular emission controls, dirt roads, poor fuel quality, open burning agricultural dust and pesticides and an expanding maquiladora industry. Our plan will lead to reductions in air pollutant emissions that cause smog and acid rain by up to 55% as early as 2018.
7p trinhthamhodang6 09-07-2020 25 2 Download
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A lab experiment was conducted at the department of microbiology, G. B. Pant University of Agriculture & technology, Pantnagar. MPS activities were measured in liquid media (NBRIP broth) using Ammonium sulphate as N source, glucose and maltose as a carbon source at 10oC. Glucose significantly increased MPS activity and this activity was three times (3610.12PPM) in comparison of maltose (1434.99PPM). The mineral phosphate solubilizing activity was strongly associated with the production of gluconic or citric acids.
7p angicungduoc5 12-06-2020 9 2 Download