Results 21 to 30 of about 620,786 (259)
Two new records of flowering plants from Lesotho
Bothalia: African Biodiversity & Conservation, 2017 Background: A number of books, articles and checklists have been published on Lesotho’s flora. The species presented here have been recorded for South Africa but have not previously been recorded for Lesotho.
Khotso Kobisi +2 more
doaj +1 more source
Analysis and Experimental Tests of a High-Performance Evacuated Tubular Collector [PDF]
, 1978 A high-performance collector based on the use of all-glass, evacuated tubular collector elements is described and analyzed, and supporting experimental data presented.
Beekley, D. C., Mather, G. R., Jr.
core +2 more sources
Use of high-thermal conductive aluminum nitride based ceramics in vacuum UHF electronic devices [PDF]
Технологія та конструювання в електронній апаратурі, 2013 Analysis of properties and characteristics of the alumina, beryllium oxide and aluminium nitride based ceramic materials used in UHF electronic devices has been made.
V. I. Chasnyk
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About Bookstores of Ankara [PDF]
Ankara Araştırmaları Dergisi, 2013 This article deals with the bookstores established in Ankara until the year of 1960. The information about the first years of bookselling and the first bookstores in Ankara is considerably scarce because of the very limited number of written documents ...
Turan Tanyer
doaj
Revival of phonecard collection as a hobby in Brazil
Revista Brasileira de História da Mídia, 2023 Phonecards have been collected as a hobby by Brazilian people with a peak in the number of collectors (around 300 thousand people) from 1994 to the beginning of the 2010s. The objective of this study was to report the revival of phonecard collection as a
Wagner de Souza Tavares
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KAJIAN EFISIENSI PANAS KOLEKTOR PEMANAS AIR SURYA PADA MOBILE MINI BIODIESEL PLANT
Rekayasa Mesin, 2022 Integration of solar water heating system and biodiesel unit process has resulted a prototype called Mini Biodiesel Plant. The key of that unit is the effectiveness of heat transfer that occured in the solar collector.
Rinjani Rakasiwi +3 more
doaj +1 more source
An oriented-design simplified model for the efficiency of a flat plate solar air collector [PDF]
, 2010 In systems design, suitably adapted physical models are required. Different modelling approaches for a solar air collector were studied in this paper. First, a classical model was produced, based on a linearization of the conservation of energy equations.
JANNOT, Yves +2 more
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Study on Flotation Separation of High Sulfur Lead-zinc Ore from Yunnan
Kuangchan zonghe liyong, 2022 Study on the mineral processing of a high sulfur lead-zinc ore in Yunnan Province were conducted. Grades of lead, zinc and silver were 2.98%, 2.79% and 114.95 g/t, respectively.
Chenqiang Hu +5 more
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The significance of geological data at hydraulic fracturing planning
Мінеральні ресурси України, 2018 Scientific and methodological aspects of the development of oil and gas fields at the use of hydraulic fracturing have been considered. The causes of unsatisfactory results at hydraulic fracturing, and also factors to be taken into account when choosing ...
H. I. Rudko +4 more
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Experimental Study on Flotation of the Fine Ilmenite with a New Collector TZ-1
Kuangchan zonghe liyong, 2022 In this paper, two new chelating agents were compared with three ilmenite conventional chelating agents, and it was found that the new chelating agents had more advantages in selective collection.
Weisi Li +6 more
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