Pummelo is the largest citrus species in the Rutaceae family and is important for human health and nutrition. This fruit is underutilized and threatened by human activities in its natural habitat. The present research was conducted in the Devanahalli region of Karnataka, which has a vast diversity of pummelo. This study aimed to evaluate 40 pummelo genotypes, selected through a preliminary survey, using morphological, biochemical and sensory assessments. Fruit and pulp weights ranged from 344.03 to 1746.23 g and 194.39 to 1073.07 g, with mean values of 939.67 and 522.81 g, respectively. Traits such as fruit length, diameter, fruit axis diameter, fruit volume, number of segments, rind thickness, fruit, pulp, peel weight, seed weight and seeds per fruit showed highly significant differences. Biochemical analysis revealed that ascorbic acid content varied from 28.53 to 60 mg/100 g, titratable acidity from 0.73 to 2.07% and total soluble solids from 7.63 to 11.07°Brix. High phenol (55.08–166.17 mg GAE/g FW) and flavonoid (39.26–137.78 mg CE/g FW) content were observed in fruit pulp, indicating significant antioxidant potential. Several morphological and biochemical traits exhibited significant positive correlations. A slightly higher phenotypic coefficient of variation was found for all the characters compared to the corresponding genotypic coefficient of variation. The principal component analysis indicated that the first nine components contributed 94.24% of the total variation. Hierarchical cluster analysis divided the populations into two distinct clusters. Sensory analysis indicated that genotypes, DVP-1 and DVP-2 had higher acceptability rates. The significant variations in plant traits among the genotypes offer great chances to select the best ones for genetic improvement programmes.

The experiments reported in this research paper aimed to evaluate the physico-chemical and sensory characteristics, microbial quality and antioxidant potential of goat's milk paneer during storage (0–12 d, 4 ± 1°C). The juices from five different citrus fruits were used as coagulant (treatments) to make goat's milk paneer. The pH of all paneer samples decreased during storage whereas titratable acidity increased. Ash (%) fat (%) and protein (%) of paneer increased slightly during storage, whereas sensory perception decreased. The juices from all the citrus fruit varieties showed high contents of total phenolics and total flavonoids which ultimately influenced ferric reducing antioxidant power, total antioxidant capacity and radical scavenging activities. As the contents of different juices were also retained in the paneer matrix, so paneer coagulated with citrus juices also showed encouraging results in terms of total phenolic and flavonoid contents, ferric reducing antioxidant power and radical scavenging activities. Amongst all the paneers, the most promising was that coagulated by kinnow juice. In addition, the whey obtained from paneer coagulated by citrus juices also showed appreciable quantities of total phenolic and flavonoid contents, thereby beneficially influencing ferric reducing antioxidant power andradical scavenging activities. It is concluded that citrus juices improve the sensorial quality and antioxidant potential of goat's milk paneer and its whey.

Spatial-temporal changes in the physico-chemical characteristics of the Agura river (Basque Country and Cantabrian region, Spain) were studied over six months, a period that included a long period of unusual drought and the return to more normal hydrological conditions. The chemical composition of the water was affected by water flow. It wasinfluenced either directly through the drainage characteristics at the level of different parts of the surrounding basin,or indirectly through the action of biotic communities on their environment. From these results, some spatial and/ortemporal models have been developed for the dynamics of the different variables in this study.