Low-cost production of cellulases is a key factor in advancing the commercialization of lignocellulosic biorefinery. Thus far, Trichoderma reesei is the leading cellulase producer for biorefinery applications. Over 70 years of research, considerable advancements have been made in comprehending the mechanisms underlying cellulases biosynthesis and secretion in T. reesei, as well as enzymatic cellulose hydrolysis. However, many unknowns still hinder the rational design of strains for robust cellulase production, with an optimized ratio of cellulolytic enzymes to reduce the required dosage for cellulose hydrolysis. Moreover, large-scale cellulase production relies on submerged fermentation, which suffers from several mass transfer limitations. As the mycelia grow, the fermentation broth rapidly develops non-Newtonian properties, necessitating energy-intensive mixing and aeration to facilitate oxygen transfer essential for strain growth. Herein, this paper critically reviews updated progress in these regards, highlights challenges, and outlines potential solutions.

Building operations-that is,the continual activities and pro-cesses required to manage and maintain buildings-are responsible for approximately 30％of global energy use and 26％of carbon dioxide(CO2)emissions.Technological pathways for conserving energy and reducing carbon emissions in building operations,the development of disruptive technologies in this field,and the syn-ergy of low-carbon technologies among the building,transporta-tion,industry,and energy sectors have become global research frontiers.Substantial reductions in operational carbon emissions are expected to transform building construction,operation,main-tenance,and repair,driving revolutionary changes across the industry.

Deep learning-based speech enhancement models, such as the complex U-Net model, achieve good results. However, as these methods simply use convolutional neural networks, they can't effectively handle the special features of the speech spectrum, including long-term temporal dependencies, crossfrequency correlations, and spatial position information. In this paper, we propose a new speech enhancement model called CCAUNet. In the model, we design a novel complex coordinate attention structure to simultaneously pay attention to temporal dependencies, frequency dependencies, and spatial position information. Meanwhile, we employ a multi resolution STFT loss, which is combined with SI-SNR loss to aid complex coordinate attention accurately process spectral features. Experimental results conducted on the Deep Noise Suppression Challenge dataset show that the proposed CCAUNet outperforms all compared models on WB-PESQ, NB-PESQ, STOI and SISNR metrics.

This book focuses on China's building energy usage and CO2 emissions, discussing the current state of building energy in four categories

Background: Bariatric surgery (BS) has been proven to be effective in the treatment of obesity and weight-related diseases, but the anatomic changes after BS make endoscopic retrograde cholangiopancreatography (ERCP) technically challenging. This study aims to assess the safety and clinical outcomes of ERCP in patients with previous BS. Materials and Methods: The National Inpatient Sample from 2007 to 2013 was queried for hospitalizations of adults over 18 years of age with procedure diagnoses of ERCP. Those with prior BS were selected as cases and those without BS as controls. Case-control matching at a ratio of 1 case to 2 controls was performed based on sex, age, race, comorbidities, and obesity. The primary outcomes were inpatient mortality and ERCP-related complications. Multivariate regression analysis was used to identify independent risk factors associated to the primary outcomes. Results: A total of 1,068,862 weighted hospitalizations with ERCP procedure codes were identified. Of these, 6689 with BS were selected as cases, and 13,246 were matched as controls. The reason for hospital admission was most often biliary stone disease (60.7% vs. 55.5%), followed by malignancy (3.5% vs. 12.1%) and cholangitis (7.7% vs. 4.5%) with and without BS, P< 0.05. The BS group had lower rates of post-ERCP pancreatitis (0.1% vs. 1.3%), cholecystitis (0.1% vs. 0.3%), bleeding (1.0% vs. 1.4%), and inpatient mortality (0.2% vs. 0.5%), but had higher rates of cholangitis (5.0% vs. 3.7%) and systemic infections (6.2% vs. 4.8%), all P< 0.05. Conclusions: BS group had lower post-ERCP pancreatitis, cholecystitis and bleeding while had more cholangitis, and systemic infection compared with those without BS. Also, BS was independently associated with reduced inpatient mortality after adjusted for age, race, and comorbidity.

TOPIC: Education, Research, and Quality Improvement TYPE: Original Investigations PURPOSE: Current data shows that obstructive sleep apnea (OSA) can increase the risk of complications in patients undergoing general anesthesia. Many guidelines recommend pre-procedural evaluation in order to decrease the risk of sedation related morbidity and mortality. We aimed to identify the rate of pre-procedural OSA screening as per the Society of Anesthesia and Sleep Medicine (SASM) guidelines published in 2016 at the Veterans Affairs New Jersey Healthcare System in East Orange. METHODS: Data from all patients undergoing general anesthesia at our institution from April 25 to May 17, 2019 were analyzed for the study sample. Demographics, clinical information, and preprocedural documentation were reviewed in order to determine if patients were screened for OSA. In addition, post procedural complications and perioperative outcomes were also noted. RESULTS: There were 84 patients (mean age 65; 94% male) who underwent general anesthesia during the study period. The average BMI was 29 kg/m2with 61% having concomitant cardiopulmonary comorbidities. All of the patients had components of OSA screening prior to general anesthesia. The mean Mallampatti score was 2.54. The following preprocedural documentation and frequencies were noted: past medical history (100%), active medication list (99%), “snoring/apneic episodes” (26%), “morning headaches” (10%), "daytime somnolence" (20%), “nighttime arousal frequency” (12%), physical exam including nasopharyngeal anatomy (98%). Of those screened, 26% had a prior diagnosis of OSA confirmed via sleep study. Of those screened, 11 patients (mean age 71; 100% male) had suffered complications up to 2-weeks post-procedure. Of those with events, 81.8% of them had underlying cardiopulmonary disease and average Mallampatti score 7% higher than those without complications. None required transfer to the intensive care unit. The following events with corresponding frequencies were observed: hypoxia (27%), delirium (55%), arrhythmia (9%), and myocardial ischemia (9%). CONCLUSIONS: During the study period, objective history including underlying conditions, medication lists, and physical exam/airway anatomy were in accordance with the SASM guidelines, however, subjective screening questions to assess for underlying OSA were not consistently documented. One possible way of improving this would be to include a widely recognized screening questionnaires such as: STOP-BANG, Epworth Sleepiness Scale, or the Berlin Questionnaire in the preop screening template used. This establishes the baseline of screening before implementation of a formal screening process after which, a more robust analysis of complications and mitigation of risk will be possible. CLINICAL IMPLICATIONS: The adequacy of preprocedural OSA screening in accordance with the SASM guidelines is important in preventing periprocedural morbidity and mortality in patients undergoing general anesthesia. DISCLOSURES: No relevant relationships by Devashish Anjaria, source=Web Response No relevant relationships by Brooke Baker, source=Web Response No relevant relationships by Jason George, source=Web Response No relevant relationships by Yi Jiang, source=Web Response No relevant relationships by Thomas Ng, source=Web Response No relevant relationships by Maliha Zainib, source=Web Response

The spread of the SARS-Cov-2 (Covid19) virus has placed an unprecedented burden on health and economy worldwide. The rapid spread of Covid19 has been predominantly driven by aerosol transmission. Mathematical epidemiological models have been used to formulate behavioral intervention strategies using a classical differential equation. Here, we apply an SEIAR epidemiological model to a homogeneous population (e.g., the scenario of the Diamond Princess cruise ship). We fit the death and case data using profile likelihood estimation methods and evaluate the role of mask in reduction of disease transmission and mortality rate. Our results suggest a strong reduction in mortality and disease burden provided at least 60% of people wear masks (robust for distinct mask types).

BACKGROUND Nonalcoholic fatty liver disease (NAFLD) has become the leading cause of chronic liver disease with increasing prevalence worldwide. Clostridioides difficile infection (CDI) remains the most common cause of nosocomial diarrhea in developed countries. AIM To assess the impact of NAFLD on the outcomes of hospitalized patients with CDI. METHODS This study was a retrospective cohort study. The Nationwide Inpatient Sample database was used to identify a total of 7239 adults admitted as inpatients with a primary diagnosis of CDI and coexisting NAFLD diagnosis from 2010 to 2014 using ICD-9 codes. Patients with CDI and coexisting NAFLD were compared to those with CDI and coexisting alcoholic liver disease (ALD) and viral liver disease (VLD), individually. Primary outcomes included mortality, length of stay, and total hospitalization charges. Secondary outcomes were in-hospital complications. Multivariate regression was used for outcome analysis after adjusting for possible confounders. RESULTS CDI with NAFLD was independently associated with lower rates of acute respiratory failure (2.7% vs 4.2%, P < 0.01; 2.7% vs 4.2%, P < 0.05), shorter length of stay (days) (5.75 ± 0.16 vs 6.77 ± 0.15, P < 0.001; 5.75 ± 0.16 vs 6.84 ± 0.23, P <0.001), and lower hospitalization charges (dollars) (38150.34 ± 1757.01 vs 46326.72 ± 1809.82, P < 0.001; 38150.34 ± 1757.01 vs 44641.74 ± 1660.66, P < 0.001) when compared to CDI with VLD and CDI with ALD, respectively. CDI with NAFLD was associated with a lower rate of acute kidney injury (13.0% vs 17.2%, P < 0.01), but a higher rate of intestinal perforation (P < 0.01) when compared to VLD. A lower rate of mortality (0.8% vs 2.7%, P < 0.05) but a higher rate of intestinal obstruction (4.6% vs 2.2%, P = 0.001) was also observed when comparing CDI with NAFLD to ALD. CONCLUSION Hospitalized CDI patients with NAFLD had more intestinal complications compared to CDI patients with VLD and ALD. Gut microbiota dysbiosis may contribute to the pathogenesis of intestinal complications.

Objectives Acute diverticulitis is a common gastrointestinal illness due to diverticular inflammation and focal necrosis. Diabetes mellitus has been reported to influence the outcomes of patients with diverticular disease. Our study aimed to examine the inpatient outcomes and complications of patients with acute diverticulitis and coexisting diabetes mellitus. Methods The Nationwide Inpatient Sample was used to identify adult patients in 2014 admitted for acute diverticulitis. Primary outcomes were mortality, length of stay (LOS), and total hospitalization charges. Secondary outcomes were complications of acute diverticulitis and interventions. Results In total, 44 330 of patients with acute diverticulitis and diabetes mellitus were included in the analysis. Acute diverticulitis patients with diabetes mellitus had a higher rate of diverticular bleeding (P < 0.0001), but lower rates of abscess (P < 0.0001), obstruction (P < 0.0001) and colectomy (P < 0.0001) when compared to acute diverticulitis patients without diabetes mellitus. Complicated diabetes mellitus was associated with a longer LOS (P = 0.00003) and greater total hospitalization charges (P = 0.0021) compared to uncomplicated diabetes mellitus when coexisting with acute diverticulitis. Conclusions Acute diverticulitis with diabetes mellitus is associated with a higher rate of diverticular bleeding, lower rates of abscess, obstruction, and colectomy compared to acute diverticulitis without diabetes mellitus. When coexisting with acute diverticulitis, complicated diabetes mellitus is not associated with higher rates of mortality or diverticulitis-related complications compared to uncomplicated diabetes mellitus.

d-Xylose is the most abundant hemicellulosic monomer on earth, but wild-type Saccharomyces cerevisiae has very limited d-xylose uptake capacity. We conducted bioprospecting for new sugar transporters from the d-xylose-consuming filamentous fungus Trichoderma reesei and identified three candidates belonging to the major facilitator superfamily. When they were expressed in yeast and assayed for d-xylose uptake, one of them, Xltr1p, had d-xylose transport activity that was more efficient than that of Gal2p, an endogenous yeast transporter. Site-directed mutagenesis was used to examine the functional contributions of 13 amino acid residues for the uptake of d-xylose, and these experiments identified particular amino acids that function distinctly in d-xylose vs glucose transport (e.g., F300). Excitingly, the yeast strain expressing the N326FXltr1p variant was able to carry a "high efficiency" transport for d-xylose but was nearly unable to utilize glucose; in contrast, the strain with the F300AXltr1p variant grew on glucose but lost d-xylose transport activity.

INTRODUCTION: Barrett’s esophagus (BE) is a metaplastic change of the distal esophageal lining resulting from chronic gastroesophageal reflux disease (GERD). Previous studies have suggested that GERD plays a pivotal role in triggering and promoting atrial fibrillation (Afib) through various mechanisms. This study aimed to exam the impact of BE on the outcomes of patients hospitalized with Afib. METHODS: The National Inpatient Sample (NIS) database was used to identify patients admitted for Afib with BE in 2010–2014. The primary outcomes were hospital mortality, length of stay, disposition status and total hospital charges. Secondary outcomes measured include acute stroke/transient ischemic attack (TIA) and acute heart failure. Propensity score matching and multivariate analysis were used. RESULTS: 11,953 patients admitted for Afib with BE were identified from NIS. The average age of patients having Afib with BE was 72.8 years old, 60.8% were male and 87.1% were Caucasian. Compared to Afib patients without BE, Afib with BE patients had a significantly greater prevalence of concomitant dyslipidemia, aortic atherosclerosis, prior PCI, tobacco use, chronic liver disease (CLD) and chronic pulmonary disease (CPD) (P < 0.05). There was no difference in the Elixhauser comorbidity index score, CHA2DS2-VASC Score between the two groups. After adjusting for possible confounders, patients with Afib and BE had less incidence of acute heart failure (aOR 0.72, P < 0.001, 95% CI 0.59–0.87), less hospital mortality (aOR 0.63, P < 0.01, 95% CI 0.46–0.87), and were more likely to have routine disposition (aOR 1.30, P < 0.0001, 95% CI 1.23–1.38). No significant difference in acute stroke/TIA events, length of stay, and total hospital charges were seen between the two groups.Table 1.: Baseline characteristics for patients admitted for Atrial fibrillation (Afib) with vs. without Barrett's esophagus from 2010 to 2014Table 2.: Selected variables for patients admitted for Atrial fibrillation (Afib) with vs. without Barrett's esophagus from 2010 to 2014Figure 1.: Afib, Arial fibrillarion.CONCLUSION: Despite patients with Afib and BE having greater prevalence of concomitant dyslipidemia, aortic atherosclerosis, prior PCI, tobacco use, CLD and CPD, hospitalized patients develop less acute stroke/TIA and acute heart failure leading to favorable hospital outcomes. This can suggest that the autonomic activity and local inflammatory responses seen with GERD are hindered by these metaplastic changes in BE. Furthermore, administration of proton pump inhibitors may alter pathophysiologic mechanisms that trigger and maintain Afib, and possibly induce conversion to a normal rhythm as discussed in prior literature.

INTRODUCTION: Cholangitis is a serious clinical syndrome of the hepatobiliary system, which can progress to sepsis, multiorgan failure and death. It can result from various etiologies such as primary autoimmune processes and secondary biliary obstruction (gallstones, benign and malignant stenosis). The aim of this study was to determine trends in patients hospitalized with benign cholangitis and factors associated with its inpatient outcomes. METHODS: The NIS database was used to identify hospitalized adult patients with cholangitis from 2010 to 2017 using ICD codes. Patients with malignancy of the gallbladder, bile duct, ampulla, duodenum or pancreas were excluded. Primary outcomes included the trend of prevalence, interventions, and inpatient outcomes. Secondary outcomes were factors that were independently associated with inpatient outcomes. RESULTS: Between 2010 and 2017, there was an uptrend of total benign cholangitis hospitalizations (33.3–38.1 per 10,000 US adults, P < 0.0001) with an annual prevalence change of 0.972 (P < 0.0001). An uptrend in benign calculous cholangitis was also observed (P < 0.0001). For biliary intervention, there were downtrends in ERCP, percutaneous and open biliary procedures (P < 0.0001). Outcomes in this study also showed downtrends in mortality (P = 0.0002) and length of stay (LOS) (P < 0.0001) with an uptrend in total hospital charges (P < 0.0001). After adjusting for covariates, the mortality was significantly higher among African American patients, >40 years old (especially >70), with Medicaid insurance, high Elixhauser comorbidity index (ECI) and specific comorbid conditions such as acute pancreatitis, HCV infection, bile duct obstruction and septicemia compared to the reference group. Total hospital charges were higher, and LOS was longer among patients with non-Caucasian ethnicities, high ECI and comorbid conditions such as cholecystitis, acute pancreatitis, HIV infection, bile duct obstruction and septicemia. CONCLUSION: Between 2010 and 2017, there was an uptrend of benign cholangitis hospitalizations with an increased proportion of calculous cholangitis and a downtrend in biliary procedures. Overall mortality rates and LOS decreased, while the costs of hospitalization increased during this study period. Further analysis identified ethnic disparities in mortality. High ECI, comorbid pancreatic/biliary conditions, infection and septicemia were independently associated with worse outcomes.Figure 1.: Trends in prevalence, procedures, mortality and cost for benign cholangitis from 2010 to 2017.Table 1.: Trends in selected variables for benign cholangitis from 2010 to 2017.Table 2.: Associations of patient and hospital characteristics with mortality, costs and length of stay.