Effects of light on plant regeneration

Plants have the capacity to regenerate new shoot apical meristems in vitro, but the regeneration rates can vary greatly. Light is a essential environmental factor that could affect plant regeneration. Varying light conditions are known to affect regeneration, but the optimal conditions of light have yet to be determined. By utilizing Arabidopsis seeds with the temporal-inducible ectopic expression of WUSCHEL line (35S>>WUS), de novo shoot regeneration was stimulated under varying light intensities, wavelengths and photoperiods. High light intensities (60-76 µmol m-2 s-1) were found to be most beneficial with respect to shoot regeneration, with a periodic light/dark cycle showing an increase in regeneration frequency over constant light conditions of the same light intensity. The absence of light on the other hand, showed the most reduction in regeneration events. Exclusive exposure to blue light (470nm) showed higher regeneration frequencies than red light (636nm). Regeneration events were shown to be coordinated by the requirement of multiple factors that work alone or in tandem. Furthermore, the better understanding of environmental factors such as wavelength requirements could see potential integration into commercial development of environmental growth plant breeding chambers that are highly optimized for crop breeding.Bachelor of Science in Biological Science

A Silent Asymptomatic Solid Pancreas Tumor in a Nonsmoking Athletic Female: Pancreatic Ductal Adenocarcinoma

A silent solid endocrine tumor of pancreas, intraductal adenocarcinoma of pancreas, is the fourth leading cancer-related death in the US. However, it is expected to become the third leading cause by 2030 owing to delayed diagnosis and slow progress in management. Chronic pancreatitis is at risk for pancreatic ductal adenocarcinoma (PDAC). PDAC is diagnostic with transabdominal sonogram, blood test such as carbohydrate antigen 19-9 (CA 19-9), and imaging. PDAC has a dismal prognosis. The survival rate in 5 years is barely 6%, while late detection rate is 80–85% with unresectable stage upon diagnosis. Here, we present a 51-year-old asymptomatic female with intermittent constipation and abdominal pain for 1 month with obstructive jaundice with PDAC with liver metastasis

A Rare Thermophilic Bug in Complicated Diverticular Abscess

Actinomycosis is a form of painful abscess in the gastrointestinal tract or in deep tissue caused by actinomyces species. They are one of the commensal bacteria in the oral cavity and gastrointestinal tract of humans but can opportunistically cause infection in immunosuppressive hosts through invasion of breached mucosa or necrotic tissue while mimicking malignancy, gastrointestinal tuberculosis, and inflammatory bowel disease. Actinomyces israelii is, by far, the major and most common human pathogen throughout literatures. By virtue of rarity and diagnostic confusion with masquerading malignancies, only 10% of the cases have been diagnosed preoperatively, so as to be able to verge patients from undergoing unnecessary surgical intervention. Herein, we present a rare case of complicated diverticular abscess manifested by Actinomyces meyeri after postoperative tissue diagnosis

A Rare Thermophilic Bug in Complicated Diverticular Abscess

Actinomycosis is a form of painful abscess in the gastrointestinal tract or in deep tissue caused by actinomyces species. They are one of the commensal bacteria in the oral cavity and gastrointestinal tract of humans but can opportunistically cause infection in immunosuppressive hosts through invasion of breached mucosa or necrotic tissue while mimicking malignancy, gastrointestinal tuberculosis, and inflammatory bowel disease. Actinomyces israelii is, by far, the major and most common human pathogen throughout literatures. By virtue of rarity and diagnostic confusion with masquerading malignancies, only 10% of the cases have been diagnosed preoperatively, so as to be able to verge patients from undergoing unnecessary surgical intervention. Herein, we present a rare case of complicated diverticular abscess manifested by Actinomyces meyeri after postoperative tissue diagnosis