Towards mitigating ecological degradation in G-7 countries : accounting for economic effect dynamics, renewable energy consumption, and innovation

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Aquifer Vulnerability Mapping in Katsina-Ala Area, Central Nigeria Using Integrated Electrical Conductivity (IEC)

The present demand for water are not only to detect and develop new groundwater systems to meet up with the millennium development goals, but also to protect existing water reservoirs against contaminants. This research work is aimed at mapping out aquifer vulnerability by integrated electrical conductivity (IEC) in Katsina-Ala area, Central Nigeria. With Schlumberger configuration, Twenty-Six (26) vertical electrical soundings (VES) were occupied in the present study using Abem terrameter SAS 300c at the peak of dry season (January to March) from which the VES data collected was interpreted for geo-electrical parameters. The parameters estimated for overburden was used to calculate the IEC and was indexed to generate a vulnerability map of the study area. The indexes revealed three strong regimes which include vulnerable ( , highly vulnerable (IEC  and extremely vulnerable (IEC from 0 to 1240脳10-3siesmens)"> . The result will aid in the design of modalities for monitoring and protection of aquifer front against contaminants in the study area. Keywords: Aquifer, Integrated electrical conductivity, Overburden, Vulnerability, Katsina-Al

Case report of vulvar schwannoma and literature review

Schwannoma is a rare benign encapsulated tumor derived from neural sheath cells. The tumor is more common in the head and neck regions and the extremities. Its location in the vulvovaginal region is a rare phenomenon with a few reported cases worldwide. We report a case of a large vulvar schwannoma occurring in an 18-year-old woman, primigravidae at 35 weeks gestation. The ulcerated tumor mass which measured 10.5 × 7 × 6.5 cm and weighed 249.2 grams was located on the right labium majus with extension into the vagina. The tumor evoked strong immunohistochemical reactivity to S-100. There was no evidence of recurrence after several weeks of excision of the neoplasm

Towards mitigating ecological degradation in G-7 countries : accounting for economic effect dynamics, renewable energy consumption, and innovation

The 21(st) century economic growth is characterized by extensive production and consumption, which increases anthropogenic emissions. However, reducing emission levels require ecological sustainability through innovation and modern technological consideration. This paper investigated not only renewable energy-driven environmental quality but also captured innovation research investment in renewables within the framework of the environmental Kuznets curve (EKC) model for G-7 countries. The findings confirmed the presence of EKC hypothesis for G-7 countries. In addition, renewable energy and innovation were identified to exert negative effects on ecological footprint. To capture the entire conditional distribution of the ecological footprint, we applied the Method of Moments Quantile Regression with fixed-effects. The results affirmed the negative effects of renewable energy innovation. Besides, their effects were heterogeneous across the quantiles with evidence of diminishing effects from lower to higher quantiles, suggesting that countries with lower levels of ecological footprint are possibly more prone to the environmental deterioration effect of income growth. The results of the causality test support economic growth-induced ecological degradation, growth-induced renewables, and innovation-induced ecological conservation. The results further showed a feedback effect between renewables and ecological footprint, innovation, and income growth as well as innovation and renewables. These findings portend important implications for the realization of carbon-free economies in G-7 countries by 2100