scholarly journals Global one-step inversion of satellite occultation measurements: A practical method

2004 ◽  
Vol 109 (D9) ◽  
Author(s):  
Filip Vanhellemont
Keyword(s):  
Practical Method ◽  
One Step

A Simple Synthesis of the Anticancer Drug Altretamine

2020 ◽  
Vol 17 (8) ◽  
pp. 628-630
Author(s):  
Vu Binh Duong ◽  
Pham Van Hien ◽  
Tran Thai Ngoc ◽  
Phan Dinh Chau ◽  
Tran Khac Vu
Keyword(s):  
Aqueous Solution ◽  
Anticancer Drug ◽  
Potassium Hydroxide ◽  
Large Scale ◽  
Synthesis Method ◽  
Practical Method ◽  
Cyanuric Chloride ◽  
Simple Synthesis ◽  
High Yield ◽  
One Step

A simple and practical method for the synthesis on a large scale of altretamine (1), a wellknown antitumor drug, has been successfully developed. The synthesis method involves the conversion of cyanuric chloride (2) into altretamine (1) by dimethylamination of 2 with an aqueous solution of 40% dimethylamine and potassium hydroxide in 1, -dioxan 4in one step to give altretamine (1) in high yield.

Finite Element Analysis and Experimental Study of an Electromagnetic Shell Part with Flow Control Forming

2013 ◽  
Vol 690-693 ◽  
pp. 2982-2989
Author(s):  
Zhi Wei Huang ◽  
Yuan Yuan Wan ◽  
Yan Bin Wang ◽  
Lu Chang Che ◽  
Chuan Lin Liu ◽  
...  
Keyword(s):  
Flow Control ◽  
Room Temperature ◽  
Steel Sheet ◽  
Equivalent Stress ◽  
Metal Flow ◽  
Practical Method ◽  
Element Analysis ◽  
One Step ◽  
Simulation Results ◽  
Shell Part

In this paper, an electromagnetic shell part was studied with the design of die, simulation and the flow control forming (FCF) method. The important technology of FCF was the design of cavity die to control metal flow. The simulation results indicate that pyramidal faces of cavity die exerted a significant influence on qualities of parts. The simulation results also revealed that the effective stresses of the sheet were inhomogeneous and the distributions of the equivalent stress were lamellar with obvious gradients. Experimental results show that steel sheet (08Al) could be formed in one step into intricate shapes at room temperature. This confirmed that FCF is a safe, clean and practical method for the near net forming of parts.

scholarly journals Evaluation of a simple device for bacteriological sampling of respirator-generated aerosols

1977 ◽  
Vol 5 (2) ◽  
pp. 178-183
Author(s):  
K J Ryan ◽  
S F Mihalyi
Keyword(s):  
Escherichia Coli ◽  
Pseudomonas Aeruginosa ◽  
Nosocomial Pneumonia ◽  
Bacterial Contamination ◽  
Practical Method ◽  
Simple Device ◽  
Step Process ◽  
One Step ◽  
Low Levels

The Aerotest sampler (Olympic Medical Corp., Seattle, Wash.) is designed to detect bacterial contamination of respirator-generated aerosols in a simple one-step process. The sampler was evaluated by controlled contamination of Bennett AP-5, PR-2, and MA-1 respirators with Escherichia coli, Pseudomonas aeruginosa, and Acinetobacter. Bacteria present as viable 1.4 to 3.5-mum particles in each of 77 aerosols were quantitated by using the Andersen viable-particle sampler, and the results were compared with those of colonies obtained from 10-s or 15-cycle Aerotest samples. All aerosols containing counts greater than expected in hospital air were detected by the Aerotest method. Thirteen of 14 aerosols containing less than 20 bacteria/0.028 m3 showed fewer than 5 colonies, whereas all aerosols containing greater than 1,000 bacteria/0.028 m3 showed at least 40 colonies. Aerosols with intermediate counts fell in between. Under the conditions described here, the Aerotest sampler was able to discriminate between the low levels of bacteria commonly found in hospital air and the bacterial contamination associated with nosocomial pneumonia. The Aerotest sampler provides a practical method for surveillance sampling of respirator nebulizers.

An environmentally benign and efficient synthesis of substituted benzothiazole-2-thiols, benzoxazole-2-thiols, and benzimidazoline-2-thiones in water

2017 ◽  
Vol 19 (23) ◽  
pp. 5591-5598 ◽  
Author(s):  
Xing Liu ◽  
Min Liu ◽  
Wan Xu ◽  
Meng-Tian Zeng ◽  
Hui Zhu ◽  
...  
Keyword(s):  
Practical Method ◽  
Environmentally Benign ◽  
Efficient Synthesis ◽  
One Step ◽  
The One

An efficient and practical method for the one-step synthesis of benzothiazole-2-thiols, benzoxazole-2-thiols and benzimidazoline-2-thiones in water was described.

Sulfuryl Fluoride Promoted Thiocyanation of Alcohols: A Practical Method for Preparing Thiocyanates

Synlett ◽  
2020 ◽  
Vol 31 (14) ◽  
pp. 1413-1417
Author(s):  
Chengrong Ding ◽  
Guofu Zhang ◽  
Lidi Xuan ◽  
Yiyong Zhao
Keyword(s):  
Ethyl Acetate ◽  
Functional Group ◽  
High Efficiency ◽  
Bond Cleavage ◽  
Ammonium Thiocyanate ◽  
Practical Method ◽  
Sulfuryl Fluoride ◽  
Mild Conditions ◽  
One Step ◽  
The One

A novel SO2F2-promoted thiocyanation method for the one-step synthesis of thiocyanates through C–O bond cleavage of readily available alcohols with ammonium thiocyanate as the thiocyanating agent was developed. The method avoids the use of additional catalyst, and a variety of (hetero)arene, alkene and aliphatic alcohols reacted with high efficiency in ethyl acetate under mild conditions to afford the corresponding thiocyanates in excellent to quantitative yields with broad functional-group compatibility.

Direct and facile synthesis of acyl azides from carboxylic acids using the trichloroisocyanuric acid–triphenylphosphine system

2013 ◽  
Vol 91 (3) ◽  
pp. 181-185 ◽  
Author(s):  
Batool Akhlaghinia ◽  
Hamed Rouhi-Saadabad
Keyword(s):  
Carboxylic Acids ◽  
Practical Method ◽  
Facile Synthesis ◽  
One Step ◽  
Acyl Azides ◽  
The One ◽  
Trichloroisocyanuric Acid

A mild, efficient, and practical method for the one-step synthesis of acyl azides from carboxylic acids using a safe and inexpensive mixed reagent, trichloroisocyanuric acid–triphenylphosphine, is described.

One-Step CVD Synthesis of Few-Layer SnS2/MoS2 Vertical Heterostructures

NANO ◽  
2019 ◽  
Vol 14 (10) ◽  
pp. 1950129 ◽  
Author(s):  
Hongxiao Zhao ◽  
Yong Yan ◽  
Xiaohui Song ◽  
Aodi Dong ◽  
Jian Su ◽  
...  
Keyword(s):  
Vapor Deposition ◽  
2D Materials ◽  
Chemical Vapor ◽  
Practical Method ◽  
Cvd Method ◽  
Cvd Synthesis ◽  
One Step ◽  
The One ◽  
Controllable Fabrication ◽  
First Time

Constructing van der Waals (vdW) heterostructures with various-layered two-dimensional (2D) materials is attractive to design various materials and devices. For controllable fabrication of vdW heterostructures, it is very important to make the growth process clear. In this work, SnS2/MoS2 vertical heterostructures were synthesized by the one-step chemical vapor deposition (CVD) method. The bottom MoS2 triangle layers can be partially or completely covered by SnS2 layers. The interlayer charge separation was also observed in the heterostructures by photoluminescence (PL) spectroscopy. The growth mechanism of SnS2/MoS2 vertical heterostructures was also discussed for the first time. MoS2 triangle layers form on the substrates at first and then grow a top layer of SnS2. This study will provide an important and practical method, as a guidance to prepare high-quality vertical heterostructures.

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