*  Frontiers | Examining the impact of acetylene on N-fixation and the active sediment microbial community | Microbiology
Here we examined the impact of a commonly employed method used to measure nitrogen fixation, the acetylene reduction assay (ARA), on a marine sediment community. Historically, the ARA technique has been broadly employed for its ease of use, in spite of numerous known artifacts. To gauge the severity of these effects in a natural environment, we employed high-throughput sequencing to detect differences in acetylene-treated sediments versus non-treated control sediments after a seven hour incubation. Within this short time period, significant differences were seen broadly across all types of microbes identified in the sediment, implying that the changes induced by acetylene occur quickly. The results have important implications for our understanding of marine nitrogen budgets. Moreover, because the ARA technique has been widely used in terrestrial and freshwater habitats, these results may be applicable to other ecosystems.
*  The importance of the amide configuration in the gelation process and topochemical polymerization of phenylacetylene...
Two series of amide-containing phenylacetylene macrocycles (PAMs) were prepared and self-assembled through a gelation process in an organic solvent. Their gelation properties along with their molecular arrangements in the xerogel state, their morphological features and their reactivity toward the topochemica
*  Global Acetylene black Industry 2014 Market Research Report Market Research Report
was a professional and depth research report on Global Acetylene black industry that you would know the world's major regional market conditions of Acetylene black industry, the main region including North American, Europe and Asia etc, and the main country including United States ,Germany ,Japan and China etc.The report firstly introduced Acetylene black basic information including Acetylene
*  Crop Science Abstract - Nitrogen Fixation by Soybeans: Seasonal and Cultivar Effects, and Comparison of Estimates1 | Digital...
Nitrogen fixation was estimated by acetylene reduction assays for 21 soybean [Glycine max(L)Merr.] cultivars from five maturity groups. Some cultivars were studied for 2 or 3 years. Fixation by four cultivars was also estimated by the isotope dilution method and by comparing N accumulation to that of a nonnodulating cultivar. Nitrogen fixation was related to maturity group. Late maturing cultivars fixed more N2 than early maturing cultivars. Within maturity groups there was little variation in nitrogen fixing activity. During a season when N2 fixation was low, there was little agreement among three methods of measuring fixation. When available soil N was artifically reduced by amendment with carbohydrate, N2 fixation was higher and there was good correlation among the techniques used. The acetylene reduction assay gave lower values than the other two methods.. Please view the pdf by using the Full Text (PDF) link under 'View' to the left.. Copyright © . . ...
*  acetylene Archives - The Words Project
What can one say about acetylene that hasn't already been said millions of times before? Probably quite a bit because how many people talk about acetylene other than welders? Probably not a lot. Despite there being a lot of stuff to say about acetylene that hasn't already been said many times before, I don't know […]. ...
*  "Nitrogen Fixation by Woody Plant Species as Measured by Acetylene Redu" by Robert E. McNiel and Philip L. Carpenter
McNiel, R. E., and P. L. Carpenter. Nitrogen Fixation by Woody Plant Species as Measured by Acetylene Reduction Assay : Technical Paper. Publication FHWA/IN/JHRP-73/13. Joint Highway Research Project, Indiana Department of Transportation and Purdue University, West Lafayette, Indiana, 1973. https://doi.org/10.5703/1288284313852 ...
*  Microbiology Society Journals | Pseudomonas azotifigens sp. nov., a novel nitrogen-fixing bacterium isolated from a compost pile
A nitrogen-fixing bacterium, designated strain 6H33bT, was isolated from a compost pile in Japan. The nitrogenase activity of this strain was detected based on its acetylene-reducing activity under low oxygen concentrations (2-4 %). An analysis of the genes responsible for nitrogen fixation in this strain, nifH and nifD, indicated a close relationship to those of Pseudomonas stutzeri A15 (A1501). Sequence similarity searches based on the 16S rRNA gene sequences showed that strain 6H33bT belongs within the genus Pseudomonas sensu stricto; closest similarity was with Pseudomonas indica (97·3 %). A comparison of several taxonomic characteristics of 6H33bT with those of P. indica and some type strains of the genus Pseudomonas sensu stricto indicated that 6H33bT could be distinguished from P. indica based on the presence of nitrogen fixation ability, the absence of nitrate reduction and denitrification abilities and the utilization of some sugars and organic acids. Phylogenetic ...
*  H CC 9.5 Acidity of Acetylene and Terminal Alkynes. - ppt download
Acetylene is a weak acid, but not nearly as weak as alkanes or alkenes. CompoundpK a HF3.2 H 2 O16 NH CH 4 60 H2CH2CH2CH2C CH 2 HCCH 26 Acetylene
*  Acetylene Plants Delhi Plant & Machinery, Engineering Equipment, Goods & Supplies
Acetylene Plants - Suppliers Manufacturers Wholesalers of Acetylene Gas Plant Plant & Machinery, Engineering Equipment, Goods & Supplies
*  webresearchoo: Review Oxygen / Acetylene Welding Kit, Victor Style with case
In general as far as I know customers who bought Oxygen / Acetylene Welding Kit, Victor Style with caseor other products in the Internet also were interested in reviews, cheap & lowest prices in outlets and stores, shipping, gift ideas, city deals, sales, coupons online, new, holiday & daily deals, bargain, best buy products including special offers on Oxygen / Acetylene Welding Kit, Victor Style with case, best deals, discount coupons, top & hot deals, great offers, last minute deals and so on ...
*  Global Acetylene Gas Market Professional Survey Report 2016 : ReportsnReports
[116 Pages Report] Check for Discount on Global Acetylene Gas Market Professional Survey Report 2016 report by QYResearch Group. Notes: Production, means the output of Acetylene Gas Revenue, means...
*  Patent US3686344 - Production of acetylene - Google Patents
Production of pure acetylene from a cracked gas obtained by cracking gaseous hydrocarbons, the process comprising a number of steps wherein the higher C3 to C5 hydrocarbons remaining in the crude acetylene are washed out with an organic solvent such as toluene.
*  Using Oxygen and Acetylene Cylinders
Hi Guys. Back in the dim and distant past when just a sprog, I was taught that when preparing to use Oxy/Acetylene cylinders. You open both using the bottle key, so that either can be shut off in 1 quick movement. You should not have to reinsert the bottle key to close off the valve. Also that it was necessary to leave the bottle key in the Acetylene Cylinder. Because this was the catalyst and Oxygen will not burn on it's own. With this in mind I asked our apprentice to set up the
*  Stock Videos of Worker weld metal gratings by acetylene torch - Worker in... csp9574718 - Search Movies, Digital Video, Motion...
Worker weld metal gratings by acetylene torch Stock Footage. csp9574718 - Worker in orange clothes weld metal gratings by acetylene torch. Affordable Royalty Free Stock Photography. Downloads for just $2.50, with thousands of images added daily. Subscriptions available for just $39.00. Our stock photo image search engine contains royalty free photos, vector clip art images, clipart illustrations.
*  Clip Art Vector of acetylene safety - a person with a lit cigarette opening an... csp4803696 - Search Clipart, Illustration,...
acetylene safety Vector. csp4803696 - a person with a lit cigarette opening an acetylene bottle. Affordable Royalty Free Stock Photography. Downloads for just $2.50, with thousands of images added daily. Subscriptions available for just $39.00. Our stock photo image search engine contains royalty free photos, vector clip art images, clipart illustrations.
*  US Patent # 8,129,542. Copper-catalysed ligation of azides and acetylenes - Patents.com
A copper catalyzed click chemistry ligation process is employed to bind azides and terminal acetylenes to provide 1,4-disubstituted 1,2,3-triazole triazoles. The process comprises contacting an organ
*  Fixation on Ice: August 2016
Sampling days in the field have been long yet extremely productive. We have collected nitrogen fixation data on primary producers found in four streams with varying temperatures. We can calculate the rate that primary producers are fixing nitrogen using a technique called Acetylene Reduction Assay or ARA. This is one method of measuring fixation which allows us to compare how rates of fixation change across a temperature gradient. You may be thinking "Whoa! Back up. What is this girl talking about?" Let me explain. Some primary producers, for example, one of my favorites, Nostoc Pink, can take nitrogen gas (N2), which is abundant in the air, and utilize the nitrogen for growth and other critical cellular processes. But for the organism to use the nitrogen from N2 gas, it must be converted into a usable form of nitrogen. One particular enzyme known as nitrogenase allows for some organisms to be able to do just that! This enzyme breaks the bonds in N2 gas, or as we call it, "fixes N2 gas", and ...
*  Reliability of the Acetylene Single-Breath Method For Measuring Cardiac Output
Advances in technology have now made it possible to analyze cardiac output (Q) with only a single-breath, making measurements during exercise quicker and less invasive for the subject. Certain non-invasive techniques allow for measurement of the disappearance of a soluble inert gas as it diffuses across the blood-gas barrier in the lungs. The rate of disappearance of the gas is directly proportional to the flow of blood past the lungs and subsequently provides an estimate of pulmonary capillary blood flow (Qc), or Q. The SensorMedics® Corporation (Yorba Linda, CA) has developed a single-breath acetylene (C₂H₂) technique (SensorMedics Vmax 229TM), which includes a simple device to linearize expiratory flow rate by increasing the time by which the sensors can measure the disappearance of the marker gas and improve quantification. The purpose of this investigation was to determine the reproducibility of the C₂H₂ single-breath technique during ramping exercise testing with the addition of a ...
*  Visualization of bond rearrangements in acetylene using near single-cycle laser pulses - Faraday Discussions (RSC Publishing)
The migration of hydrogen atoms resulting in the isomerization of hydrocarbons is an important process which can occur on ultrafast timescales. Here, we visualize the light-induced hydrogen migration of acetylene to vinylidene in an ionic state using two synchronized 4 fs intense laser pulses. The first puls Ultrafast Imaging of Photochemical Dynamics
*  Acetylene vessel filler composition - Patent # 4129450 - PatentGenius
An aqueous slurry composition which is curable at saturated steam pressure and temperature of 360.degree. to 400.degree. F to form a hard porous mass suitable for containing dissolved acetylene gas solutions, comprising lime, crystalline silica, and a thickening agent selected from the group consisting of (a) polyethylene oxide, (b) amorphous glassy silica, (c) a soluble salt of phosphate and a soluble salt of calcium and (d) a soluble salt of phosphate and a neutralizing acid.
*  A solid acetylene reagent with enhanced reactivity: fluoride-mediated functionalization of alcohols and phenols - Green...
The direct vinylation of an OH group in alcohols and phenols was carried out utilizing a novel CaC2/KF solid acetylene reagent in a simple K2CO3/KOH/DMSO system. The functionalization of a series of hydroxyl-group-containing substrates and the post-modification of biologically active molecules were successfu
*  Acetylene Plant Operator Salary in United States - ERI | SalaryExpert
The average acetylene plant operator salary in the United States is $38,747 or an equivalent hourly rate of $19. Salary estimates based on salary survey data collected directly from employers and anonymous employees in the United States
*  What is the balanced equation for the complete combustion of acetylene? | Reference.com
The balanced equation for the combustion of acetylene is 2 H2C2 + 5 O2 ? 4 CO2 + 2 H2O. A combustion reaction occurs when a compound merges with oxygen to release heat in an exothermic...
*  Acetylene - Chemical production and investment cost | IHS Markit
Reports emphasize significant developments in process technology for Acetylene that have potential implications for the chemical and energy industries
*  polypyrrole/nano-sulfur/PVDF/acetylene black composite
Page contains details about polypyrrole/nano-sulfur/PVDF/acetylene black composite . It has composition images, properties, Characterization methods, synthesis, applications and reference articles : nano.nature.com