Sign inSubmit
Tips: “quotes” for a phrase · author:Lee · a DOI goes straight to its article

84 articles for “Dark”
Set a search alert
Research ArticleOpen accessIn the abstractReduction of Isolation Period of Coal Humic AcidsClaudia Hui Hui Chen, Osumanu Haruna Ahmed, Nik Muhamad Ab. Majid, Mohamadu Boyie JallohProblem statement: The isolation of Humic Acids (HA) from coal is laborious, costly and time consuming. The extraction and fractionation periods of HA vary from 4 h to 7 days. Fractionation period ranges from 12-24 h. However, most studies use 24 h as extraction period and also 24 h as fractionation period. This study was conducted to investigate whether the … …American Journal of Applied Sciences, Vol. 6, Issue 7 · 31 Jul 2009 · 7,241 accessesView PDFCite
Research ArticleOpen accessIn the abstractMicrofacies and Sedimentary Environments of Gurpi and Pabdeh Formations in Southwest of IranMohammad BahramiProblem statement: The Upper Cretaceous Gurpi and lower Tertiary Pabdeh formations as units of folded Zagros Zone were studied in three different regions (Tang-e-Abolhiat, Tang-e-Zanjiran and Maharloo) in Fars Province, Iran. Approach: Gurpi formation consisted of thin to medium sized layers of gray marl and marlstone interbedded with thin layers of argillaceous limestone and shale. The dominant microfacies in this … …American Journal of Applied Sciences, Vol. 6, Issue 7 · 31 Jul 2009 · 7,738 accessesView PDFCite
Research ArticleOpen accessIn the abstractComparative Study of Volatile Compounds from Genus OcimumS. Raseetha Vani, S. F. Cheng, C. H. ChuahThere are distinct varieties of basil types in the genus Ocimum which makes them very special. Genus Ocimum is widespread over Asia, Africa and Central & Southern America. All basils are member of the Lamiaceae family. The colors of the leaves vary from bright green to purple-green and sometimes almost black. Fresh basil leaves have a strong and characteristic aroma, … …American Journal of Applied Sciences, Vol. 6, Issue 3 · 31 Mar 2009 · 12,676 accessesView PDFCite
Research ArticleOpen accessIn the abstractDetermination of Minimal Duration Essential for Isolation of Humic Acids From Soils in Forest Restoration ProgrammesMohd Ramzan Nur Hanisah, Osumanu Haruna Ahmed, Kasim Susilawati et al.This study was conducted to investigate whether a simple and rapid method could be developed for extracting, fractionating and purifying soil HA in forest rehabilitation programmes. Humic acids from 10 g of soil were extracted with 100 mL of 0.10 M NaOH. Different extraction periods (4, 8, 12, 16, 20 and 24 h) were tested. Samples were centrifuged (16,211 G … …American Journal of Agricultural and Biological Sciences, Vol. 3, Issue 3 · 30 Sep 2008 · 8,176 accessesView PDFCite
Research ArticleOpen accessIn the abstractImpairment of Retrograde Neuronal Transport in Cardiac Vagal Motoneurons in Streptozotocin-Induced Diabetic Rats: A Wheat Ger Agglutinin-Horseradish Peroxidase Neurohistochemical studyA. Odekunle, C.M. PhillipsCentral projections of vagal motoneurons to the heart were studied in diabetic rats using Wheat germ Agglutinin-Horseradish peroxidase (WGA-HRP). Experimental rats were rendered diabetic by intraperitoneal injection of streptozotocin in citrate buffer. The diabetic rats were maintained in a stable diabetic state by daily injection of insulin for 24 weeks. Age-matched control rats were injected intraperitoneally with citrate buffer not … …OnLine Journal of Biological Sciences, Vol. 8, Issue 2 · 30 Jun 2008 · 6,744 accessesView PDFCite
Research ArticleOpen accessIn the abstractEffect of Exposure to Various Durations of Light on Serum Insulin-Like Growth Factor-I in Prepubertal Holstein HeifersL.J. Spicer, B.A. Buchanan, L.T. Chapin, H.A. TuckerOur objective was to determine if prolonged exposure to various durations of light (i.e., photoperiod) would affect serum IGF-I concentrations in heifers. Thus, 16 Holstein heifers, 2 to 4 mo of age, were exposed during a 5-wk pretreatment period to 12 h of cool-white fluorescent light (L) at an intensity of 1200 lux and 12 h of dark (D). At … …American Journal of Animal and Veterinary Sciences, Vol. 2, Issue 2 · 30 Dec 2007 · 6,673 accessesView PDFCite
Research ArticleOpen accessIn the abstractEffect of UV-C on Drought Tolerance of Alfalfa (Medicago sativa) CallusAli Akbar Ehsanpour, Roya RazavizadehWater stress and unfavorable climate decrease the growth and development of plant globally. Medicago is a valuable plant as a source of food for animal, foliage and for medicine. Since, Iran is located in a dry area; consequently, the study of plant responses to water stress is important. In this research UV-C radiation was used to induce physiological and genetic … …American Journal of Biochemistry and Biotechnology, Vol. 1, Issue 2 · 30 Jun 2005 · 6,809 accessesView PDFCite
Research ArticleOpen accessIn the abstractEffect of Water Bath Heating on Tannin Content and Quality Improvement Potential of Gambier (Uncaria gambir Roxb.)Daimon Syukri, Bastian Nova, Rina Yenrina et al.Gambir (Uncaria gambir Roxb.) is a source of natural phenolic compounds rich in catechins and tannins and has potential as a sustainable industrial raw material. During heating, phenolic compounds may undergo structural changes, including possible oxidation and polymerization, which can affect gambier quality beyond its catechin content. This study evaluated the effect of indirect heating duration using a water bath … …OnLine Journal of Biological Sciences, Vol. 26, Issue 4 · 23 Sep 2026 · 715 accessesView PDFCite
Research ArticleOpen accessIn the abstractInhibitory Effects of Artemisia afra Extracts on the Bio-Activity of Banana TyrosinaseTsholofelo Motshologane, Jacobus Pieter Hough Van WykMelasma, formerly known as chloasma, is an acquired pigmentary condition, occurring most commonly on the face of humans. This disorder, which is more prevalent in females and darker skin types, is predominantly attributed to Ultraviolet (UV) exposure and hormonal influences. This condition is caused by an over-production of melanin, a pigment that gives color to the skin, hair, and eyes … …OnLine Journal of Biological Sciences, Vol. 25, Issue 1 · 18 Jan 2025 · 4,621 accessesView PDFCite
Case ReportOpen accessIn the abstractChromomycosis: Case Reports of Exuberant Forms Including Carcinomatous DegenerationCarla Andréa Avelar Pires, Aline de Lima Dias, Adriana Kamilly Leitão Pitman Machado et al.Chromomycosis, or chromomycosis, is a chronic, progressive cutaneous and subcutaneous mycosis caused by several species of pheoid or dermaticeous (darkly pigmented) fungi. It mainly affects male patients, in the age group between 30 and 60 years and is more common on rural areas, being associated to traumatic events, which may explain the high frequency of involvement of the lower limbs … …American Journal of Infectious Diseases, Vol. 15, Issue 1 · 6 Feb 2019 · 7,765 accessesView PDFCite