In recent years, although scholars and practitioners in the supply chain (SC) field have become increasingly aware of the importance of social media for multipurpose applications, the subject remains unclarified about its functions and outcomes, especially in the 4.0 context. This review paper aims to visualize the big picture and structure of knowledge related to the application of social media in managing supply chains by adopting a bibliometric analysis on a sample of 354 research articles retrieved from the Web of Science during the period between 2008 and 2022 with two widely used bibliometric techniques: co-citation and co-word analysis. We discovered five major clusters of how social media is used in the supply chain context, including (1) in enhancing supply chain sustainability and business transformation, (2) social media analytics as an effective technique to extract business value, (3) in facilitating communication and coordination in the supply chain network, (4) in promoting social interaction and customer relationship management, and (5) in the development of supply chain relationship management. These will enable practitioners to adopt early changes in their SC, allowing them to become competitive and gain market leadership. Supply chain managers can connect with other SC stakeholders and share information through social media to improve operations, establish relationships, reduce risks, and altogether reach for sustainability. Potential research ideas are also offered for future investigation.
In 2015, the Vietnam’s Renewable Energy Development Strategy up to 2020 with an outlook to 2050 was approved. Renewable energy sources were developing to ensure energy security and addressing the growing power demand of the country. Increasing renewable energy sources such as biomass, solar, wind and small hydro is the way to shift Vietnam to a sustainable energy future. The general picture on Vietnamese renewable energy practice and experience are presented in this paper. Also it offers suggestion the technical and political keys to minimize the barriers in renewable energy sector. It is the general review of available sources on Green technology for sustainable development: Practice and experience of renewable energy in Vietnam. In conclusion the study gives brief status of energy barriers, biomass, renewable energy, small-hydro power, solar power, and wind power of Vietnam
This paper summarises a study of the application of the synthetic chelate ethylenediaminetetraacetic acid (EDTA), and the natural chelates ethylenediamine-N,N-disuccinic acid (EDDS) and nitrilotriacetate (NTA) to enhance ryegrass uptake of the heavy metal(oid)s (HMs) (As, Cd, Cu, Pb and Zn) from contaminated soils in mining sites. The study compares the effects of these chelates (EDTA, EDDS and NTA) on the phytoavailability of HMs (As, Cd, Cu, Pb, Zn) using ryegrass (Lolium multiflorum) through the single addition and sequential addition methods. The results show that application of EDTA, EDDS and NTA significantly increases ryegrass’s (Lolium multiflorum) shoot uptake of some HMs when compared with no EDTA, EDDS or NTA application, particularly through sequential chelate treatment (EDTA 0.5:1 + 0.5:1; NTA 0.5:1 + 0.5:1; EDDS 0.5:1 + 0.5:1). EDTA 0.5:1 + 0.5:1 was more effective at increasing the concentration of Pb in shoots than were the other chelates (EDDS and NTA) and controls. Moreover, the concentrations of Zn in the shoots of ryegrass in LH significantly increased with the application of split dose (0.5:1 + 0.5:1). The plants displayed symptoms of toxicity including yellow and necrotic leaves at the end of the experiment. The selected chelates (EDTA, EDDS and NTA) led to a significant decrease in plant biomass (yield) 28 days after transfer with a maximum decrease in EDTA treatment (0.5:1 + 0.5:1) soils. This decrease was 3.43-fold in HT, 3-fold in LH and 1.59-fold, respectively, relative to the control. HM concentration and dissolved organic carbon (DOC) in pore water, provided an explanation for why fresh weight was significantly reduced with application of chelates in sequential dose (EDTA 0.5:1 + 0.5:1 and NTA 0.5:1 + 0.5:1).
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