https://journals.univ-tlemcen.dz/JNPRA/index.php/JNPRA <p style="text-align: justify;"><strong>JNPRA </strong>publishes high-quality manuscripts of original works in all aspects of natural compounds of plants, algae, microbes, and animals. The journal is peer-reviewed and publishes two issues per year. Authors are encouraged to submit complete, unpublished, original works that are not under review in any other journals. All submitted manuscripts are subject to initial examination by the editors for the first step and peer-reviewed by at least two anonymous expert referees for the second step. Major topics of JNPRA enclosed are:</p> <ul> <li> <p style="text-align: justify;"><span style="color: #006600;"><strong>Biology and Biological Chemistry:</strong></span> Biochemistry, Biology, Microbiology, Cell and Molecular Biology, Biotechnology, Neuroscience, Phytochemistry.</p> </li> <li> <p style="text-align: justify;"><span style="color: #006600;"><strong>Medicinal Chemistry:</strong></span> Toxicology, Pharmacology, Pharmacognosy, Nutrition and Health, Therapeutics, Bioactive Compounds, Detoxification, Biological activities.</p> </li> <li> <p style="text-align: justify;"><span style="color: #006600;"><strong>Pharmaceutical Formulations: </strong></span>Formulations from natural products, Analysis, Quality Controls.</p> </li> <li> <p style="text-align: justify;"><span style="color: #006600;"><strong>Agricultural and Food Chemistry:</strong></span> Food Technology, Agricultural and Food Safety, Food analysis.</p> </li> <li> <p style="text-align: justify;"><span style="color: #006600;"><strong>Applications of Natural Resources:</strong> </span>Cosmetics, Dietary Supplements, Nutraceuticals, Biopharmaceutical Science, Waste and co-product valuation.</p> </li> <li> <p style="text-align: justify;"><span style="color: #006600;"><strong>Toxicology:</strong> </span>Detoxification, Toxicological medicine, Risk assessment, Safety evaluation, environmental health, Pollution and public health, Waste and co-product valuation.</p> </li> <li> <p style="text-align: justify;"><strong><span style="color: #006600;">Traditional Medicine and Ethnopharmacology</span>:</strong> folkloric medicine, ethnobotany, ethnopharmacology.</p> </li> </ul> <p style="text-align: justify;"><em>All papers that treated the biological activities of crude extracts are accepted after structure elucidation of active molecules. Papers related to In Silico Design of Bioactive Molecules are welcomed for publication. The paper reporting new compounds and manuscripts describing their biological activity are more solicited for publishing in our journal.</em></p> <ul> <li> <p style="text-align: justify;"><span style="color: #663300;"><u><strong>Frequency:</strong> </u></span>The Journal of Natural Product Research and Applications publishes <strong>a twice per year</strong> (April and November).</p> </li> <li style="text-align: justify;"><span style="color: #663300;"><strong>ISSN (online): <em> 2773-4188</em></strong></span></li> <li style="text-align: justify;"><span style="color: #663300;"><strong><em>DOI: <a href="https://%20doi.org/10.46325/JNPRA">https:// doi.org/10.46325/JNPRA</a></em></strong></span></li> <li> <p style="text-align: justify;"><span style="color: #663300;"><u><strong>Submission:</strong></u> </span>all peer review is single-blind and submissions should be made by sending over our website <a href="https://journals.univ-tlemcen.dz/JNPRA/index.php/JNPRA/about/submissions">(click to submit).</a></p> </li> <li> <p style="text-align: justify;"><a href="https://docs.google.com/document/d/1RYGCoe6qFnGpu-pc44FQ6FzBmGxEpeAw/edit?usp=drivesdk&amp;ouid=102846262700995496353&amp;rtpof=true&amp;sd=true" target="_blank" rel="noopener"><strong><u><span style="color: #663300;">Template JNPRA</span>: </u></strong><span style="color: #000000;">click here to download</span></a></p> </li> <li> <p style="text-align: justify;"><strong><span style="color: #663300;"><u>Journal charges</u></span>:</strong> there are no publication <strong>fees to publish</strong> in the Journal of Natural Product Research and applications (JNPRA).</p> </li> <li> <p style="text-align: justify;"><strong><span style="color: #663300;"><u>Format:</u></span> </strong>Currently, the Journal of Natural Product Research and Applications is publishing<strong> online-only</strong> format.</p> </li> <li> <p style="text-align: justify;"><strong><span style="color: #663300;"><u>Manuscript categories:</u></span> </strong>the Journal of Natural Product Research and Applications publishes <em>full Papers, short communications, reviews, letters to the editor, notes, and book reviews.</em></p> </li> </ul> University of Abou Bekr Belkaid at Tlemcen en-US Journal of Natural Product Research and Applications 2773-4188 https://journals.univ-tlemcen.dz/JNPRA/index.php/JNPRA/article/view/69 <p>Soil compaction constitutes a serious problem for the development and production of crops. This settlement is generally caused by the multiple passages of machinery, particularly in excessive moisture conditions.</p> <p>In this context, a study of the soil bulk density variation as a function of the number of passages, moisture and the state of the soil (tilled or not) are studied. The density study is conducted on a plot located in Morneg-Ben Arous (Tunisa). Experimental tests applied to a sandy soil showed that the density increased as a function of the number of tractor passes and the depth soil, under different moisture levels. In fact, two passes, at a depth 20 cm, under moisture conditions varying between 3-7% and 12-16%, can increase the soil density by 12% and 37% respectively compared to the density of a tilled soil. In addition, following 3 passes, a compaction (Bulk Density =1.6g/cm³) of the wet soil (moisture 12-16%) at 40 cm depth was detected.</p> Nesrine Nefzi, Anis Elaoud, Rim Jalel Hanen Ben Hassen Copyright (c) 2024 https://creativecommons.org/licenses/by-nc/4.0 2024-06-30 2024-06-30 4 01 1 10 10.46325/jnpra.v4i01.69 https://journals.univ-tlemcen.dz/JNPRA/index.php/JNPRA/article/view/71 <p>To assess the toxicity effect of diatomaceous earth on larvae and adults of <em>Ceratitis capitata</em>, we subjected them to different doses to control their mortalities. Adults of <em>Ceratitis capitata</em> were exposed to diatomaceous earth at different concentrations: 0mg/cm²; 2,6mg ; 2,8mg ; 3mg ; 3,2mg ; 3,4mg ; 3,6mg ; 3,8mg and 4 mg/cm². We monitored their mortality rate every 12 hours up to 96 hours of exposure.</p> <p>The larvae were also exposed to different concentrations of the diatomaceous earth mixed with sawdust: 0, 100, 120, 140, 160, 180, 200, 220 and 240 mg/cm³. We monitored their mortality rate every 12 hours up to 96 hours of exposure before pupation.</p> <p>The insecticidal activity of diatomaceous earth on <em>Ceratitis capitata</em> has offered us highly significant results on the different stages (larvae and adults). Indeed, we obtained CL₅₀ of 158.29 mg/cm3 for larvae and 3.262mg/cm² for adults. The mortality average of <em>Ceratitis</em> larvae increased with the doses of diatomite used, reaching its maximum at the dose of 240mg/cm³.&nbsp; The mortality average of <em>Ceratitis</em> adults after exposure to diatomaceous earth showed an ascending curve which started from the dose of 2.60mg/cm² with a mortality average of 43.3% through repetition, reaching its maximum of 10 dead individuals through the repetition of the dose of 4mg/cm². These results allow us to propose this natural product as an alternative to insecticides hitherto used to fight <em>Ceratitis capitata</em>, which will better protect our health and environment.</p> Yassine Bounouira*, Abdellah Mohamed Cherif M'saad Guerfali Meriem Siham Tchouar , Nassira Gaouar Benyelles Copyright (c) 2024 https://creativecommons.org/licenses/by-nc/4.0 2024-06-30 2024-06-30 4 01 11 22 10.46325/jnpra.v4i01.71