8 results for “R. B. Iffa”

AuthorR. B. Iffa1 article

Research ArticleOpen accessIn the author namesThermodynamic Investigation of Two-Stage Absorption Refrigeration System Connected by a CompressorL. Kairouani, E. Nehdi, R. B. IffaThe present work is to analyze a two-stage cycle based on the ammonia-water absorption system, with intermediate compression. The two generators of the system are heated by geothermal energy at low temperature. The study shows that this system makes it possible at lower generator temperature, under the limits permitted by the systems suggested up to now. For Tg = 335 … …American Journal of Applied Sciences, Vol. 2, Issue 6 · 30 Jun 2005 · 6,741 accessesView PDF Cite

Research ArticleOpen accessIn the author namesEffect of Leucaena leucocephala Protein Supplement on Nutrient Intake, Milk Yield and Quality, Hematology, Metabolites and Economy Efficiency in Etawah Crossbreed GoatsIdat Galih Permana, Salwa Iffat Zahidah Arif, Fajar Rezki Pambudi et al.Legumes, such as Leucaena leucocephala (LL), have high protein and Rumen degradable Protein (RUP) content, so adding legumes to the diet of dairy goats can meet the protein requirements for milk synthesis. However, the addition of LL alone is insufficient to meet the RUP requirement of dairy goats, thus requiring other protein sources. LL Protein Supplement (LLPS) is a feed … …American Journal of Animal and Veterinary Sciences, Vol. 20, Issue 2 · 23 Aug 2025 · 5,348 accessesView PDF Cite

Research ArticleOpen accessIn the author namesOptimal Control Strategy for Parallel Fan-Powered VAV SystemsNabil Nassif, Iffat Ridwana, Mostafa Tahmasebi, Pejman EbrahimiASHRAE Guideline 36 recommends resetting the Supply Air Temperature (SAT) for Variable Air Volume (VAV) systems to balance fan power, heating and cooling loads and zone reheat requirements. This is achieved by employing a trim and response algorithm in conjunction with using the outside air temperature and readings from zone cooling loops. However, resetting the SAT for the VAV systems … …Energy Research Journal, Vol. 13, Issue 1 · 6 Jun 2022 · 10,355 accessesView PDF Cite

Research ArticleOpen accessIn the author namesCytotoxic Activity of Tinospora crispa Crude Extracts (Stem) Against K562 Human Leukemia CellsNormah Awang, Haziratul Iffah Ruzali, Rapidah Mohamad et al.Tinospora crispa (T. crispa) is traditionally used as an herbal medicine for treatment of gout and is an analgesic, anti-inflammatory and antihyperuricemic agent. Cytotoxicity of hexane, dichloromethane, ethanol and aqueous extracts of T. crispa stem against K562 cells was assessed. Crude extracts of T. crispa stem were obtained by sonication and maceration methods. T. crispa stem powder was macerated and … …OnLine Journal of Biological Sciences, Vol. 19, Issue 2 · 11 May 2019 · 7,872 accessesView PDF Cite