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Gas Separation Membranes: Current Status
Puri Pushpinder S. 한국막학회 1996 멤브레인 Vol.6 No.3
Membrane-based gas separation systems are now widely accepted and employed as unit operation in industrial gas, chemical, and allied industries. Following their successful commercialization in the late seventies to recover hydrogen from ammonia purge gas streams, membrane-based systems have gained acceptance in a wide variety of applications. Numerous systems are in operation today to: recover hydrogen from other purge gas and hydrocarbon streams; adjust the H2/CO ratio in syngas; remove CO2 from natural gas; recover helium; dry gas streams; and separate air. Lower cost, ease of operation, operational flexibility and portability are a few of the reasons membrane-based systems are chosen over absorption and cryogenic-based separations in certain applications.
Endoscopic Ultrasound-Guided Fine-Needle Aspiration of the Adrenal Glands: Analysis of 21 Patients
Rajesh Puri,Ragesh Babu Thandassery,Narendra S. Choudhary,Hardik Kotecha,Smruti Ranjan Misra,Suraj Bhagat,Manish Paliwal,Kaushal Madan,Neeraj Saraf,Haimanti Sarin,Mridula Guleria,Randhir Sud 대한소화기내시경학회 2015 Clinical Endoscopy Vol.48 No.2
Background/Aims: Endoscopic ultrasound-guided fine-needle aspiration (EUS-FNA) cytology of adrenal masses helps in etiological diagnosis. The aim of this study was to evaluate the diagnostic yield of EUS-FNA of adrenal masses in cases where other imaging methods failed and/or were not feasible. Methods: Twenty-one consecutive patients with adrenal masses, in whom adrenal FNA was performed because conventional imaging modalities failed and/or were not feasible, were prospectively evaluated over a period of 3 years. Results: Of the 21 patients (mean age, 56±12.2 years; male:female ratio, 2:1), 12 had pyrexia of unknown origin and the other nine underwent evaluation for metastasis. The median lesion size was 2.4×1.6 cm. Ten patients were diagnosed with tuberculosis (shown by the presence of caseating granulomas [n=10] and acid-fast bacilli [n=4]). Two patients had EUS-FNA results suggestive of histoplasmosis. The other patients had metastatic lung carcinoma (n=6), hepatocellular carcinoma (n=1), and adrenal lipoma (n=1) and adrenal myelolipoma (n=1). EUS results were not suggestive of any particular etiology. No procedure-related adverse events occurred. Conclusions: EUS-FNA is a safe and effective method for evaluating adrenal masses, and it yields diagnosis in cases where tissue diagnosis is impossible or has failed using conventional imaging modalities.
Basant K. Puri,Mussadiq Shah,Peter O.O. Julu,Michele C. Kingston,Jean A. Monro 대한배뇨장애요실금학회 2014 International Neurourology Journal Vol.18 No.2
Purpose: The primary aim was to carry out a pilot study to compare the loss of sexual libido between a group of Lyme disease patients and a group of matched controls. The secondary aim was to evaluate whether loss of libido in Lyme disease patients is associated with urinary bladder detrusor dysfunction. Methods: A group of 16 serologically positive Lyme disease patients and 18 controls were queried directly about loss of libido. Results: The 2 groups were matched with respect to age, sex, body mass index, and mean arterial blood pressure. None of the 34 subjects was taking medication that might affect sexual libido or had undergone a previous operative procedure involving the genitourinary tract. Of the 16 Lyme disease patients, 8 (50%) had no loss of libido, and of the 18 controls, none had loss of libido (P<0.001). In the Lyme disease patient group, there was no statistically significant relationship between loss of libido and urinary bladder detrusor dysfunction (P=0.61). Conclusions: This pilot study suggested an association between Lyme disease and loss of libido. Moreover, this loss of libido did not seem to be associated with urinary bladder detrusor dysfunction. Given these results, we recommend further studies to confirm the association.
REVIEW : Epidemiology of Ulcerative Colitis in South Asia
( Amarender Singh Puri ) 대한장연구학회 2013 Intestinal Research Vol.11 No.4
The South Asian region comprising of India, Pakistan, Bangladesh, Nepal, and Sri Lanka is multi-ethnic with vast cultural differences. Yet they have in common, a strong predisposition for inflammatory bowel disease especially ulcerative colitis (UC). The vast majority of the population is rural with limited access to health care facilities. Community based studies on epidemiology of UC are sparse making it difficult to extrapolate data for the whole region. India has the highest incidence and prevalence of UC in Asia which is higher than the published figures for Korea and Japan, the two leading industrialized countries in Asia. Asian diaspora studies have revealed an unmasking of the disease when natives of this region migrate to countries with a higher prevalence of the disease. Data mainly from the UK suggests a higher incidence of the disease in Asian migrants compared to the indigenous population. Incidence data from within the sub-continent suggests a higher incidence of the disease in India as compared to its southern neighbour Sri Lanka suggesting a north-south gradient. Time trend studies from India do not suggest an increasing incidence of disease as has been observed in other parts of Asia. Some data point to phenotypically different disease in south Asian patients as compared to Caucasians. Familial clustering and cumulative colectomy rates are higher in Western patients as compared to their Asian counterparts. Asian patients with UC have a significantly lower risk of development of colorectal carcinoma vis a vis the Caucasian population. There is a pressing need for more studies on the epidemiology, long-term outcome and natural history of the disease in this region. (Intest Res 2013;11:250-255)
Urinary Bladder Detrusor Dysfunction Symptoms in Lyme Disease
Basant K. Puri,Mussadiq Shah,Peter O. Julu,Michele C. Kingston,Jean A. Monro 대한배뇨장애요실금학회 2013 International Neurourology Journal Vol.17 No.3
Purpose: Symptoms of urinary bladder detrusor dysfunction have been rarely reported in Lyme disease. The aim was to carry out the first systematic study to compare the prevalence of such symptoms in a group of Lyme disease patients and a group of matched controls. Methods: A questionnaire relating to detrusor function was administered to 17 serologically positive Lyme disease patients and to 18 control subjects. Results: The two groups were matched in respect of age, sex, body mass, and mean arterial blood pressure. None of the 35 subjects was taking medication which might affect urinary function and none had undergone a previous operative procedure on the lower urinary tract. Six of the Lyme patients (35%) and none of the controls (0%) had symptoms of detrusor dysfunction (P<0.01). Conclusions: This first systematic controlled study confirms that Lyme disease is associated with urinary bladder detrusor dysfunction. Further evaluation of detrusor function is warranted in this disease.