Colorimetric determination of sulfur dioxide in air using a droplet collector of malachite green solution

The measurement of sulfur dioxide in air at the parts-per-billion level is described. The experimental arrangement consists of two optical fibers placed on opposite sides of a liquid droplet of malachite green solution. After light has been passed through the droplet, the transmitted light is measured by a referenced photodetection arrangement. The light used in this absorption process is from a monochromatic source (lambda(max) 625 nm). This arrangement permits the variation of color in the droplet to be measured. The sulfur dioxide in the sample is collected by the droplet; it reacts with malachite green resulting in a colorless dye. The decoloration of the solution is proportional to the concentration of sulfur dioxide sampled. The signal depends on the sample flow rate. The present technique is simple, inexpensive, and permits a fast and near real time measurement while consuming very little reagent, (C) 1999 Academic Press.

John La Farge as collector of Japanese art : motivations and reflections

Throughout his lifetime, American artist John La Farge (1835-1910) amassed an enormous collection of art and books. La Farge’s study of art and culture encompassed several genres and aesthetic elements. La Farge has been credited as the first American artist — even prior to James Abbott McNeill Whistler (1834-1903)— to integrate visual elements and cultural awareness of the Far East within his own Western-trained art. Although many scholars have studied La Farge’s art and life from various perspectives, including his interest in Asian art, the object of the present study is solely focused on La Farge’s collecting of Japanese art.

The adventures of James Collier, first collector of the port of San Francisco,

"Two hundred and fifty copies ... printed."

The lives and opinions of Benj'n Franklin Butler : United States District Attorney for the southern district of New York, and Jesse Hoyt, counsellor at law, formerly Collector of Customs for the port of New York : with anecdotes or biographical sketches of Stephen Allen, George P. Barker ... /

Includes index.

Speech of Mr. Pearce, of Rhode Island : delivered in the House of Representatives, on the 5th, 6th, and 7th days of April, on the resolution of the Judiciary Committee, relative to the Collector of Wiscasset.

Mode of access: Internet.

The lives and opinions of Benj'n Franklin Butler, United States district attorney for the southern district of New York; and Jesse Hoyt, counsellor at law, formerly collector of customs for the port of New York; with anecdotes or biographical sketches of Stephen Allen; George P. Barker [etc] ...

Another edition, practically identical, was issued the same year with the author's name corrected.

Annual report of the Insular Collector of Customs to the honorable Secretary of Finance for the fiscal year ended .

Description based on: 1926.

Confirmation of Daniel D. Moore to be Collector of Internal Revenue : hearings before the Committee on Finance, United States Senate, Seventy-third Congress, second session, on confirmation of Daniel D. Moore, of New Orleans, La., to be Collector of Internal Revenue, Apr.4-13, 1934.

[Pt. 1] has title: Confirmation of Daniel D. Moore to be Collector of Internal Revenue : hearing before a subcommittee of the Committee on Finance ... Feb. 19, 1934.

Reciclando o destino: a trajetória do cortador de cana que se tornou catador de recicláveis e autogestor de seu ofício

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Reliability and quality of water isotope data collected with a lowbudget rain collector

RATIONALELow-budget rain collectors for water isotope analysis, such as the `ball-in-funnel type collector' (BiFC), are widely used in studies on stable water isotopes of rain. To date, however, an experimental quality assessment of such devices in relation to climatic factors does not exist. METHODSWe used Cavity Ring-Down Spectrometry (CRDS) to quantify the effects of evaporation on the O-18 values of reference water under controlled conditions as a function of the elapsed time between rainfall and collection for isotope analysis, the sample volume and the relative humidity (RH: 31% and 67%; 25 degrees C). The climate chamber conditions were chosen to reflect the warm and dry end of field conditions that favor evaporative enrichment (EE). We also tested the performance of the BiFC in the field, and compared our H-2/O-18 data obtained by isotope ratio mass spectrometry (IRMS) with those from the Swiss National Network for the Observation of Isotopes in the Water Cycle (ISOT). RESULTSThe EE increased with time, with a 1 increase in the O-18 values after 10days (RH: 25%; 25 degrees C; 35mL (corresponding to a 5mm rain event); p <0.001). The sample volume strongly affected the EE (max. value +1.5 parts per thousand for 7mL samples (i.e., 1mm rain events) after 72h at 31% and 67% RH; p <0.001), whereas the relative humidity had no significant effect. Using the BiFC in the field, we obtained very tight relationships of the H-2/O-18 values (r(2) 0.95) for three sites along an elevational gradient, not significantly different from that of the next ISOT station. CONCLUSIONSSince the chosen experimental conditions were extreme compared with the field conditions, it was concluded that the BiFC is a highly reliable and inexpensive collector of rainwater for isotope analysis. Copyright (c) 2014 John Wiley & Sons, Ltd.

Portrait of Max Boehm ( 1871-1944 ).

The model is seated, facing the viewer and looking straight at him. He is wearing a business suit and holding a cigar. The pose is relaxed abd the color tonalities warm, with the yellow background dominant. Heavy impasto is used for face and hands. Neg. 37599 Signed upper right, also dated

On the performance analysis and design of a novel shared-layer integrated devices using RCE-p-i-n-PD/SHBT - art. no. 67820J

We have explored the shared-layer integration fabrication of an resonant-cavity-enhanced p-i-n photodector (RCE- p-i-n-PD) and a single heterojunction bipolar transistor (SHBT) with the same epitaxy grown layer structure. MOCVD growth of the different layer structure for the GaAs based RCE- p-i-n-PD/SHBT require compromises to obtain the best performance of the integrated devices. The SHBT is proposed with super-lattice in the collector, and the structure of the base and the collector of the SHBT is used for the RCE. Up to now, the DC characteristics of the integrated device have been obtained.

Voltammetric study of vitamin K-3 at interdigitated array microelectrodes

Cyclic voltammetry of Vitamin K-3 (V-K3) was measured with Pt disk electrode, platinum interdigitated array (Pt-IDA) and Au-IDA microelectrodes in single and dual modes. The effects of pH, scan rate and collector potential on the current of generator and collector were studied. The collection efficiency of V-K3 at IDA electrodes was measured. The linear ranges for current response as a function of V-K3 concentration were found to he 10 mu M-1 mM (i(g)) and 1 mu M - 1 mM (i(c)) for the generator and collector of the Pt-IDA electrode, respectively. The effects of waiting time, potential difference and pulse electrolysis time in differential pulse voltammetry (DPV) on the peak current of V-K3 were studied to get the optimal condition at 0.1 M Na2HPO4, pH 11.50 and 11.0 for Au-IDA and Pt-IDA, respectively.

Some Incidents and Circumstances Written by William F. Haile in the Course of his Life, 1859

William Frederick Haile was born in Putney, Windham County, Vermont on November 4th, 1791. He was raised in Fairfield, Herkimer County, New York. At the age of 21 he entered the United States Army. He served in the War of 1812 as a lieutenant in the 11th United States Infantry. He was severely wounded in the Battle of Lundy’s Lane [not mentioned in this memoir]. After the war he settled in Plattsburgh, New York and became a lawyer. He was a judge from April 1837 to March of 1843. He was also the fifth collector of customs for the District of Champlain. He died on October 1861 at the age of 69. This document was written for the children of William Frederick Haile in January of 1859 [as noted on p.23]. The memoir ends in July of 1814 before the Battle of Lundy’s Lane. Haile’s memoir is laced with names of military personnel and he expresses his opinions freely.

Análise do desempenho térmico de um sistema de aquecimento solar utilizando coletor com superfície absorvedora em chapas de PVC

It s presented a solar collector to be used in a system for heating bath water, whose main characteristic is its low cost. The collector consists of five plates of PVC with 10 mm thick, 200 mm in width and 1400mm in length, with an area equal to 1.4 square meters. The plates were connected in parallel to the ends of PVC tubes of  40 mm and 32 mm. The plates were coated on one side with aluminum sheets of soft drinks and beers cans open. The system worked on a thermosiphon and was tested in two configurations: the plates uncoated and coated with aluminum material, to determine the influence of material on the efficiency of the collector. For both configurations was used EPS plates below the surface to minimize heat losses from the botton. The thermal reservoir of the heating system is, also, alternative and low cost, since it was constructed from a polyethylene tank for storing water, with volume of 150 end 200 liters. It will be presented the thermal efficiency, heat loss, water temperature of the thermal reservoir at the end of the process and simulation of baths for a house with four residents. The will be demonstrated thermal, economic and material viability of the proposed collector, whose main innovation is the use of recyclables materials, cans of beer and soft drinks, to increase the temperature of the absorber plate.