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Resonant energy transfer in molecular systems can remain efficient under substantial environmental dephasing, making transport enhancement alone an insufficient indicator of persistent quantum coherence. A central question is whether the environmental scale governing the disappearance of coherence-sensitive behaviour coincides with the scale governing the loss of resonance-enhanced transfer. This work develops an open quantum-system framework for examining that separation in a weakly driven donor-bridge-acceptor molecular network.

Extreme climatic events represent a major constraint for rain-dependent family farming in tropical areas. This study analyses the effects of climate extremes on family farming in the Commune of Ouinhi, southern Benin, through rainfall and temperature variability, their impacts on agricultural yields and household livelihoods, and the statistical correlation between these parameters.

Nanotechnology is an important and rapidly growing area of study and development, where a unique phenomenon offers innovative applications. Nanotechnology around the world is applied in various fields like agriculture, health, environment, forestry etc. In forestry, the technology provides solution to many forest-related problems and it is utilised for improving and protecting wood quality, extinguishing forest fires, successful seed germination, and effective herbal medication delivery.

This article investigates the parameters that influence shearing cutting forces for three grades of sheet metal materials. A test setup was designed to carry out the cutting experiments. The experimental design implemented takes into account the influence of process parameters (cutting rate and sheet orientation) and geometric parameters (cutting edge radius). The influence of the material type is analyzed through the use of three sheet metal grades. On the one hand, the results show that shearing cutting forces increase proportionally with the material's ultimate tensile strength.

Ribosomal RNA (rRNA) gene transcription accounts for most of the RNA in prokaryotic and eukaryotic cells. Nucleolus organizer regions (NORs), which span millions of base pairs, include hundreds to thousands of tandemly repeated head-to-tail rRNA genes in eukaryotes. RNA Polymerase I (Pol I) transcribes these nucleolar rRNA genes, and the expression of these genes is regulated by the physiological requirement for ribosomes. Regulation occurs at several levels, one of which is an epigenetic on/off switch that controls the number of active rRNA genes.

L’élevage pastoral sahélien joue un rôle prépondérant dans l’économie des pays de l’Afrique de l’Ouest. Ces systèmes d’élevage mobile apparaissent comme la principale activité agricole de valorisation durable d’une ressource naturelle fragile et éparse dans les zones sèches sahéliennes dont la couverture végétale est particulièrement malmenée. Toutefois cet élevage est souvent aussi source de dégradation des ressources naturelles.

The soils of Burkina Faso are poor in major nutrients, with a particularly pronounced deficiency in phosphorus. However, the country has enormous deposits of natural phosphate (Burkina phosphate), but these are little used in agricultural production because of their slow solubilization. Phosphate rock was therefore processed to make the phosphorus more readily available to crops. This processing involved partial acidification and calcination.

Dans les régions sahéliennes, les collectivités territoriales sont confrontées à des changements climatiques qui affectent les systèmes de production et les moyens d'existence des populations. Cette étude analyse les tendances et le niveau d’intégration des changements climatiques dans les Plans de Développement Communal (PDC)de Bandé. L’étude repose sur des données climatiques journalières couvrant la période 1981-2024, complétées par des enquêtes auprès des acteurs locaux et une évaluation des documents de planification communale.

Animal diversity is a key component of ecosystem stability and sustainable development. The Bundelkhand region of Central India spread across UP and MP supports a variety of mammals, birds, reptiles, amphibians, fishes and insects. The region supports a diverse assemblage of vertebrate and invertebrate fauna despite recurrent droughts, rocky terrain, and increasing anthropogenic pressures. However Rapid Habitat degradation, deforestation, mining, climate change, water scarcity and human- wildlife conflict have severely affected its faunal diversity.

Food insecurity remains a significant global problem especially in developing countries like Nigeria. This challenge increases human suffering and predisposes young, adult and aged to disease attack, impaired human growth and reduced life expectancy. Hence, this study examined the determinants of food security among farming households of South-South region of Nigeria. Secondary data of General Household Survey data, wave 4, panel 2018/2019 from the National Bureau of Statistics was used for the study. Purposive sampling was used to select Delta and Akwa Ibom states from the region.